2017 Annual Report To Our Shareholders 2017 marked a successful year. Columbia had another solid year of production as our bankers grew relationships on both sides of the balance sheet. Our full year record earnings were helped, in part, by rising rates as evidenced by the expansion in our net interest margin during the year. A year of strong financial performance and growth Net income for 2017 was a record $112.8 million, an increase of 8% from net income of $104.9 million for 2016. Diluted earnings per share were $1.86 for 2017 compared to $1.81 for 2016. Our balance sheet grew substantially during the year due to the combination of our acquisition of Pacific Continental Bank and organic growth. Total assets at year-end 2017 were $12.72 billion, up 34% from $9.51 billion for the prior year. Total deposits were $10.53 billion, up 31% from $8.06 billion. Total net loans were $8.36 billion, up 35% from $6.21 billion the prior year. We also had strong loan originations of $1.20 billion during the year. Our credit metrics remain strong. At the end of 2017, our ratio of nonperforming assets to total assets was 0.63%, compared to 0.35% for the prior year. This metric was influenced by the nonperforming assets acquired through the Pacific Continental Bank acquisition, but still compares favorably to our group of peer banks. Columbia Bank’s total risk-based capital ratio at December 31, 2017, was 12.81%, well in excess of the minimum of 10% required to be considered “well- capitalized” under regulatory standards. Our solid capital levels give us the flexibility to continue our consideration of best options for the effective deployment of resources. Pacific Continental Bank joins the Columbia family The primary highlight of the last year was our acquisition of Pacific Continental, which enhanced our network of branches along the I-5 corridor through Eugene, Oregon, and brought our asset size well beyond the $10 billion threshold. It further strengthened Columbia’s position in key Northwest metropolitan markets while adding additional expertise in dental, healthcare and nonprofit business segments. We are pleased to welcome this group of talented bankers into the Columbia Bank family. Columbia appoints new leadership and welcomes new directors Following the untimely loss of our colleague, friend and former President and Chief Executive Officer, Melanie Dressel, early in the year, the board concluded a nationwide search for a successor. Former Executive Vice President and Chief Operating Officer, Hadley Robbins, was named President and CEO on July 1, 2017. Mr. Robbins brings more than three decades of community bank leadership experience to the role and represents attributes that best encompass the bank’s culture: a commitment to maintaining an exceptional workplace, a focus on client satisfaction and a dedication to each of our communities. Former Chief Financial Officer, Clint Stein, assumed the role of Chief Operating Officer following Mr. Robbins’ promotion to CEO. Mr. Stein brings more than a decade of senior leadership experience at Columbia. In his new role, he will have direct responsibility for the bank’s customer- facing lines of business, including Commercial Banking, Retail Banking and Wealth Management areas, as well as operational groups supporting those lines of business. We were pleased to announce several additions to our board last year. Randal (Randy) Lund joined the board on July 26, 2017. A former partner of 37 years with KPMG, Mr. Lund serves on the audit committee and the mergers and acquisitions committee. Eric Forrest, co-president of Eugene-based Bigfoot Beverages and former member of the Pacific Continental Corporation board of directors, was appointed on November 1, 2017, and serves on the personnel and compensation committee, as well as the trust committee. Forbes ranks Columbia 11th in America Columbia Bank received its highest ranking to date on the recent Forbes annual list of America’s Best Banks. Our rank of 11 is up significantly from the previous year’s place of 30, and our location on the list positions us as the number one bank among institutions headquartered in the Northwest. Rankings are based on the safety, soundness and profitability of the nation’s 100 largest publicly traded banks and thrifts. Our continued recognition by Forbes is a testament to our commitment to doing the right thing for our employees and our clients each and every day. Continued focus on enhancing technology The past year brought the implementation of new strategic technology platforms for our clients and our employees, paving the way for an improved client experience. We introduced a customer relationship management suite to help us track and grow relationships with existing and prospective clients. We implemented Columbia Connect, a combined mobile and online banking interface for consumers to position us well for swift feature enhancements. We also launched a marketing automation suite powering new digital sales campaigns through social media and the web. These initiatives exemplify our commitment to exploring and implementing technology that removes complexity and makes life and work simpler for our clients and our people. Thank you for your continued support of Columbia. Sincerely, William T. Weyerhaeuser Chairman of the Board Columbia Banking System, Inc. Hadley S. Robbins President and Chief Executive Officer Columbia Banking System, Inc. and Columbia Bank 2017 Annual Report and Form 10-K Board of Directors Executive Officers William T. Weyerhaeuser David A. Dietzler Craig D. Eerkes Chairman of the Board Hadley S. Robbins President & Chief Executive Officer Ford Elsaesser Mark A. Finkelstein John P. Folsom Eric Forrest Thomas M. Hulbert Michelle M. Lantow Randy Lund Mae Fujita Numata Elizabeth Seaton Kumi Yamamoto Baruffi Executive Vice President & General Counsel Dave C. Lawson Executive Vice President & Chief Human Resources Officer Andy McDonald Executive Vice President & Chief Credit Officer Clint E. Stein Executive Vice President & Chief Operating Officer UNITED STATTT ES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ☐ ANNUAL REPORTRR PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2017 or TRANSITION REPORTRR PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-20288 COLUMBIA BANKING SYSTEM, INC. (Exact name of registrant as specified in its charter) Washington (State or other jurisdiction of incorporation or organization) 91-1422237 (I.R.S. Employer Identification Number) 1301 A Street Tacoma, Washington 98402 (Address of principal executive offices) (Zip code) Registrant’s Telephone Number,rr Including Area Code: (253) 305-1900 Securities Registered Pursuant to Section 12(b) of the Act: Common Stock, No Par Value (Title of class) Securities Registered Pursuant to Section 12(g) of the Act: None Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☒ Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐ Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any,yy every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ☒ No ☐ Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (17 C.F.R. 229.405) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company,yy or emerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,”yy and “emerging growth company” in Rule 12b-2 of the Exchange Act. ☒ Large Accelerated Filer ☐ Accelerated Filer ☐ Non-accelerated Filer (Do not check if a smaller reporting company) ☐ Smaller Reporting Company ☐ Emerging Growth Company If an emerging growth company,yy indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒ The aggregate market value of Common Stock held by non-affiliates $2,276,688,279 based on the closing sale price of the Common Stock on that date. ff of the registrant at June 30, 2017 was The number of shares of registrant’s Common Stock outstanding at January 31, 2018 was 73,038,791. DOCUMENTS INCORPORATEDAA BY REFERENCE: Portions of the Registrant’s definitive 2018 Annual Meeting Proxy Statement. Part III COLUMBIA BANKING SYSTEM, INC. FORM 10-K ANNUAL REPORTRR DECEMBER 31, 2017 TABLE OF CONTENTS PART I Item 1. Item 1A. Item 1B. Item 2. Item 3. Item 4. Item 5. Item 6. Item 7. Item 7A. Item 8. Item 9. Item 9A. Item 9B. Item 10. Item 11. Item 12. Item 13. Item 14. Business . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Risk Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unresolved Staffff Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Legal Proceedings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mine Safety Disclosures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PART II Market for the Registrant’s Common Equity,yy Related Stockholder Matters, and Issuer Purchases of Equity Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Selected Financial Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Management’s Discussion and Analysis of Financial Condition and Results of Operations. . . . Quantitative and Qualitative Disclosures About Market Risk . . . . . . . . . . . . . . . . . . . . . . . . . . . Financial Statements and Supplementary Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Changes in and Disagreements With Accountants on Accounting and Financial Disclosure . . . Controls and Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PART III and Corporate Governance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Directors, Executive Officers Executive Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Security Ownership of Certain Beneficial Owners and Management and Related ff Stockholder Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Certain Relationships and Related Transactions, and Director Independence. . . . . . . . . . . . . . . Principal Accounting Fees and Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PART IV Item 15. Item 16. Exhibits, Financial Statement Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Form 10-K Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Signatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index to Exhibits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 14 22 23 23 24 27 29 53 110 110 113 114 114 114 114 114 115 115 116 117 i CAUTIONARYRR NOTE REGARDING FORWARR RD-LOOKING STATTT EMENTS This annual report on Form 10-K may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include, but are not limited to, statements about our plans, objectives, expectations and intentions that are not historical facts, and statements identified by words such as “expects,” “anticipates,” “intends,” “plans,” “believes,” “should,” “projects,” “seeks,” “estimates” or the negative version of those words or other comparable words or phrases of a future or forward-looking nature. Forward-looking statements are based on current beliefs and expectations of management and are inherently subject to significant business, economic and competitive uncertainties and contingencies, many of which are beyond our control. In addition, forward-looking statements are subject to assumptions with respect to future business strategies and decisions that are subject to change. In addition to the factors set forth in the sections titled “Risk Factors,” “Business” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in this Form 10-K, the following factors, among others, could cause actual results to differ from the anticipated results expressed or implied by forward-looking statements: ff materially • • • • • • • • • • • • • • • • • • • • • ff ff ff funding sources; on us than expected and adversely affect credit quality,yy collateral values, including real estate our ability to continue internal growth and maintain the and enhanced financial and operating performance we expect to realize from investments in personnel, national and global economic conditions could be less favorable than expected or could have a more direct and ff ff pronounced effect quality of our earning assets; the housing markets where we operate and make loans could face challenges; the risks presented by the economy,yy which could adversely affect collateral, investment values, liquidity and loan originations and loan portfolio delinquency rates; the efficiencies acquisitions (including the acquisition of Pacific Continental Corporation (“Pacific Continental”)), and infrastructure may not be realized; the ability to successfully integrate Pacific Continental, or to integrate future acquired entities; interest rate changes could significantly reduce net interest income and negatively affect projected business increases following strategic expansion could be lower than expected; changes in the scope and cost of Federal Deposit Insurance Corporation (“FDIC”) insurance and other coverages; the impact of acquired loans on our earnings; changes in accounting principles, policies and guidelines applicable to bank holding companies and banking; changes in laws and regulations affecting such laws and regulations by applicable governmental and regulatory agencies; competition among financial institutions and nontraditional providers of financial services could increase significantly; continued consolidation in the Northwest financial services industry resulting in the creation of larger financial institutions that may have greater resources could change the competitive landscape; the goodwill we have recorded in connection with acquisitions could become impaired, which may have an adverse impact on our earnings and capital; our ability to identify and address cyber-security risks, including security breaches, “denial of service attacks,” “hacking” and identity theft; any material failure or interruption of our information and communications systems or inability to keep pace with technological changes; ff our ability to effectively regulatory and compliance risk; the effect ff our profitability measures could be adversely affected natural disasters, including earthquakes, tsunamis, flooding, fires and other unexpected events; and ff the effects of any damage to our reputation resulting from developments related to any of the items identified above. manage credit risk, interest rate risk, market risk, operational risk, legal risk, liquidity risk and our businesses, including changes in the enforcement and interpretation of of geopolitical instability,yy including wars, conflicts and terrorist attacks; if we are unable to effectively manage our capital; ff ff ff You should take into account that forward-looking statements speak only as of the date of this report. Given the described uncertainties and risks, we cannot guarantee our future performance or results of operations and you should not place undue reliance on forward-looking statements. We undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required under federal securities laws. 1 ITEM 1. BUSINESS General PART I Columbia Banking System, Inc. (referred to in this report as “we,” “our,” “the Company” and “Columbia”) is a registered bank holding company whose wholly owned banking subsidiary is Columbia State Bank (“Columbia Bank” or “the Bank”). Established in 1993 in Tacoma, Washington, we provide a full range of banking services to small and medium-sized businesses, Company professionals and individuals throughout Washington, Oregon and Idaho. The Company’s subsidiary Columbia Trust (“Columbia Trust”) ff Washington, Oregon and Idaho. is an Oregon trust company that provides agency,yy fiduciary and other related trust services with offices in r r At December 31, 2017, Columbia Bank had locations throughout Washington, Oregon and Idaho. The vast majority of Columbia Bank’s loans and deposits are within its service areas. Columbia Bank is a Washington state-chartered commercial bank, the deposits of which are insured in whole or in part by the FDIC. Columbia Bank is subject to regulation by the FDIC, the Washington State Department of Financial Institutions Division of Banks, the Oregon Department of Consumer and Business Services Division of Finance and Corporate Securities, and the Idaho Department of Finance. Although Columbia Bank is not a member of the Federal Reserve System, the Board of Governors of the Federal Reserve System (“Federal Reserve”) has certain supervisory authority over the Company,yy which can also affect Columbia Bank. ff Business Overview Our goal is to continue to be a leading Northwest regional community banking company while consistently increasing shareholder value. We continue to build on our reputation for exceptional customer satisfaction in order to be recognized as the bank of choice for individual and business customers in all markets we serve. We have established a network of 155 branches in Washington, Oregon and Idaho as of December 31, 2017 from which we intend to grow market share. We operate 75 branches in 21 counties in the state of Washington, 66 branches in 16 counties in Oregon and 14 branches in 10 counties in Idaho. Our branch system funds our lending activities and allows us to better serve both retail and business depositors. We believe this approach enables us to expand lending activities while attracting a stable core deposit base and enhancing utilization of our full range of products and services. To support our strategy of market penetration and increased profitability,yy while continuing our personalized banking approach, we have invested in experienced banking and administrative personnel and have incurred related costs in the creation of our branch network. Our branch system and other delivery channels are continually evaluated as an important component of ongoing efforts service. without compromising customer to improve efficiencies ff ff Business Strategy Our business strategy is to provide our customers with the financial sophistication and product depth of a regional banking company while retaining the appeal and service level of a community bank. We continually evaluate our existing business processes while focusing on maintaining asset quality and a diversified loan and deposit portfolio. We continue to build our strong core deposit base, expanding total revenue and controlling expenses in an effort and increase our return on average equity. As a result of our strong commitment to highly personalized, relationship-oriented customer service, our diverse products, our strategic branch locations and the long-standing community presence of our managers and staff,ff we believe we are well positioned to attract and retain new customers and to increase our market share of loans, deposits, investments and other financial services. We are dedicated to increasing market share in the communities we serve by continuing to leverage our existing branch network and considering business combinations that are consistent with our expansion strategy throughout the Northwest. We have grown our franchise over the past decade through a combination of acquisitions and organic growth. to gain operational efficiencies ff ff To that end, on November 1, 2017 the Company completed its acquisition of Pacific Continental Corporation, the parent company of Pacific Continental Bank headquartered in Eugene, Oregon (“Pacific Continental”). The Company acquired approximately $2.94 billion in assets, including $1.87 billion in loans measured at fair value, and approximately $2.12 billion in deposits. See Note 2 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report for further information regarding this acquisition. 2 Products & Services We place the highest priority on customer service and assist our clients in making informed decisions when selecting to ensure that we provide our from the products and services we offer customers with the tools to meet their financial needs. A more complete listing of all the services and products available to our customers can be found on our website: www.columbiabank.com . We continually review our product and service offerings . Some of the core products and services we offer include: ww ff ff ff Personal Banking Business Banking Wealth Management • • • • • • Checking and Savings Accounts Debit and Credit Cards Digital Banking Personal Loans Home Loans Foreign Currency • • • • • Checking and Savings Accounts Debit and Credit Cards Business Loans Professional Banking Treasury Management • Merchant Card Services • International Banking • • • Financial Services Private Banking r Trust and Investment Services ff our personal banking customers an assortment of account products including noninterest and Personal Banking: We offer interest-bearing checking, savings, money market and certificate of deposit accounts. Overdraft protection is also available with direct links to the customer’s checking account. Personal banking customers may also choose from a variety of loan products including home mortgages for purchases and refinances, home equity loans and lines of credit, and other personal loans. Eligible personal banking customers with checking accounts are provided a Visa® Debit Card. Further, a variety of Visa® Credit Cards are available to eligible personal banking customers. In addition, Columbia Connect, our personal digital banking platform, allows our personal banking customers to safely and securely conduct their banking business 24 hours a day,yy 7 days a week across all of their devices. Columbia Connect has simple navigation and provides access to frequently used features such as depositing checks, paying bills, transferring funds, or locating the nearest Columbia Bank branch or ATM. to business banking customers to satisfy all their banking needs. In addition to these core banking products, we provide Business Banking: A variety of checking, savings, interest bearing money market and certificate of deposit accounts are offered ff a breadth of services to support the complete financial needs of small and middle market businesses including Business Debit and Credit Cards, Business Loans, Healthcare Banking, Treasury Management, Merchant Card Services, and International Banking. Business Debit and Credit Cards Our business banking customers are offered ff a check wherever Visa® is accepted. We also partner with Elan Financial Services to offer a variety of Visa® Credit Cards that come with important business features including expense management tools, free employee cards and added security benefits. A specialty community card for nonprofit organizations and municipalities is also available. a selection of Visa® Cards including the Business Debit Card that works like ff Business Loans ff We offer a variety of loan products tailored to meet the diverse needs of business banking customers. Business loan products include agricultural loans, asset-based loans, builder and other commercial real estate loans, and loans guaranteed by the Small Business Administration. In addition, we offer a suite of Business Edge loans designed for small businesses looking to expand, purchase equipment, or in need of working capital. ff Professional Banking Columbia Professional Bankers are uniquely qualified to help dentists, physicians and veterinarians acquire, build and grow their practice. We offer necessary to meet their business’s unique needs. ff tailored banking solutions delivered by experienced bankers with the industry knowledge 3 Treasury Management Columbia Bank’s diversified Treasury Management Programs are tailored to meet specific banking needs of each individual business. We combine technology with integrated operations and local expertise for safe, powerful, flexible solutions. Columbia’s clients, of all sizes, choose from a full range of transaction and Treasury Management tools to gain more control over their money. Treasury Management solutions include Business Online and Mobile Banking, Business Bill Pay,yy Automated Clearing House (ACH) collections and payments, Remote Deposit Capture, and a variety tools to protect against fraud and manage excess funds. Merchant Card Services In 2017, we partnered with Vantiv to provide businesses with a broad range of payment acceptance solutions to meet their customer’s needs. Our Merchant Card Services powered by Vantiv provide businesses with sophisticated technology,yy competitive pricing and best-in-class service for their merchant needs. International Banking Columbia International Banking offers ff a range of financial services to help our business customers explore global markets and conduct international trade smoothly and expediently. We are proud to provide small and mid-size businesses with the same caliber of expertise and personalized service that national banks usually limit to large businesses. Our experience with foreign currency exchange, letters of credit, foreign collections and trade finance services can help companies open the door to new markets and suppliers overseas. Wealth Management: We offer services and private banking, as well as trust and investment services. ff tailored solutions to individuals, families and professional businesses in the areas of financial CB Financial Services CB Financial Services(1) offers ff a comprehensive array of financial solutions that focuses on wealth management by delivering personalized service and experience through dedicated financial advisors serving various geographical areas. Financial Services solutions include: Financial Planning: Asset Allocation, Net Worth Analysis, Estate Planning & Preservation(2), Education Funding, Wealth Transfer. Wealth Management: Professional Asset Management, Tailored Investment Strategies, and Professional Money Managers. Insurance Solutions: Long-TermTT Care, Life, and Disability Insurance. Individual Retirement Solutions: Retirement Planning, Retirement Income Strategies, and Traditional and Roth IRAs. Business Solutions: Business Retirement Plans, Key Person Insurance, Business Succession Planning, and Deferred Compensation Plans. Private Banking Columbia Private Banking offers ff ff affluent clientele and their businesses complex financial solutions, such as deposit and treasury management services, credit services, and wealth management strategies. Each private banker coordinates a relationship team of experienced financial professionals to meet the unique needs of each discerning customer. __________ (1) Securities and insurance products are offered ff through Cetera Investment Services LLC (doing insurance business in California as CFGIS Insurance Agency), member FINRA/SIPC. Advisory services are offered Investment Advisers LLC. Neither firm is affiliated offered. ff * Investment products are Not FDIC insured * No bank guarantee * Not a deposit * Not insured by any federal government agency * May lose value. with the financial institution where investment services are through Cetera ff ff (2) For a comprehensive review of your personal situation, always consult a tax or legal advisor. Neither Cetera, nor any of its representatives may give legal or tax advice. 4 Trust and Investment Services: Through our Columbia Trust fiduciary,yy investment and administrative trust services, coupled with local, personalized attention to the unique requirements of Special Needs (Supplemental) Trusts, each trust. Services include Personal Trusts, Agency and Charitable Management Services. A more complete listing of all the services and products available to our customers can be found on Columbia Trust’s ww Trust’s website is not incorporated by reference into this report. Estate Settlement Services, Investment website: www.columbiatrustcompany . Information contained on Columbia Company subsidiary,yy we offer a wide range of high quality .comyy r rr r rr ff r Competition Our industry remains highly competitive despite a slow recovery from the economic crisis. Several other financial institutions with greater resources compete for banking business in our market areas. These competitors have the ability to make larger loans, finance extensive advertising and promotional campaigns, access international financial markets and allocate their investment assets to regions of highest yield and demand. In addition to competition from other banking institutions, we continue to compete with non-banking companies such as credit unions, brokerage houses, financial technology companies and other financial services companies. We compete for deposits, loans, and other financial services by offering similar breadth of products as our larger competitors while delivering a more personalized service level. our customers ff Employees As of December 31, 2017, the Company employed 2,120 full-time equivalent employees. We value our employees and pride ourselves on providing a professional work environment accompanied by comprehensive pay and benefit programs. We are committed to providing flexible and value-added benefits to our employees through a “TotalTT Compensation Philosophy” which incorporates all compensation and benefits. Our continued commitment to employees was demonstrated by Columbia Bank being honored as one of the Puget Sound Business Journal’s “Washington’s consecutive year. Best Workplaces” for the eleventh WW Available Information We file annual reports on Form 10-K, quarterly reports on Form 10-Q, periodic reports on Form 8-K, proxy statements and other information with the United States Securities and Exchange Commission (the “SEC”). The public may obtain copies . of these reports and any amendments at the SEC’s Internet site, www.sec.gov ww . Additionally,yy reports filed with the SEC can be obtained free of charge through our website at www.columbiabank.com These reports are made available through our website as soon as reasonably practicable after they are filed electronically with the SEC. Information contained on our website is not incorporated by reference into this report. ww Supervision and Regulation The following discussion provides an overview of certain elements of the extensive regulatory framework applicable to the Company and Columbia State Bank, which operates under the name Columbia Bank in Washington, Oregon and Idaho. This regulatory framework is primarily designed for the protection of depositors, customers, federal deposit insurance funds and the banking system as a whole, rather than specifically for the protection of shareholders. Due to the breadth and growth of this regulatory framework, our costs of compliance continue to increase in order to monitor and satisfy these requirements. To the extent that this section describes statutory and regulatory provisions, it is qualified by reference to those provisions. These statutes and regulations, as well as related policies, are subject to change by Congress, state legislatures and federal and state regulators. Changes in statutes, regulations or regulatory policies applicable to us, including the interpretation or implementation thereof, could have a material effect on our business or operations. In light of the financial crisis, numerous changes to the statutes, regulations or regulatory policies applicable to us have been made or proposed. The full extent to which these changes will impact our business is not yet known. In addition, recent political developments, including the change in the presidential administration in the United States, have added additional uncertainty to the implementation, scope and timing of regulatory reforms. However, our continued efforts complexity and cost of our business. to monitor and comply with new regulatory requirements add to the ff ff 5 Federal and State Bank Holding Company Regulation General. The Company is a bank holding company as defined in the Bank Holding Company Act of 1956, as amended (the “BHCA”), and is therefore subject to regulation, supervision and examination by the Federal Reserve. In general, the BHCA limits the business of bank holding companies to owning or controlling banks and engaging in other activities closely related to banking. The Company must file reports with and provide the Federal Reserve such additional information as it may require. Under the Financial Services Modernization Act of 1999, a bank holding company may apply to the Federal Reserve to become a financial holding company,yy and thereby engage (directly or through a subsidiary) in certain expanded activities deemed financial in nature, such as securities and insurance underwriting. As of the date of this report, we have not elected to be treated as a financial holding company. Holding Company Bank Ownership. The BHCA requires every bank holding company to obtain the prior approval of the Federal Reserve before (i) acquiring, directly or indirectly,yy ownership or control of any voting shares of another bank or bank holding company if, after such acquisition, it would own or control more than 5% of such shares; (ii) acquiring all or substantially all of the assets of another bank or bank holding company; or (iii) merging or consolidating with another bank holding company. In addition, under the Bank Merger Act of 1960, as amended, the prior approval of the FDIC is required for the Bank to merge with another bank or purchase all or substantially all of the assets or assume any of the deposits of another FDIC-insured depository institution. In reviewing applications seeking approval of merger and acquisition transactions, bank regulators consider, among other things, the competitive effect and public benefits of the transactions, the capital position and managerial resources of the combined organization, the risks to the stability of the U.S. banking or financial system, the applicant’s performance record under the Community Reinvestment Act of 1977 (the “CRA”), the applicant’s compliance with fair housing and other consumer protection laws and the effectiveness laundering activities. In addition, failure to implement or maintain adequate compliance programs could cause bank regulators not to approve an acquisition where regulatory approval is required or to prohibit an acquisition even if approval is not required. of all organizations involved in combating money ff ff Holding Company Control of Nonbanks. With some exceptions, the BHCA also prohibits a bank holding company from acquiring or retaining direct or indirect ownership or control of more than 5% of the voting shares of any company which is not a bank or bank holding company,yy or from engaging directly or indirectly in activities other than those of banking, managing or controlling banks, or providing services for its subsidiaries. The principal exceptions to these prohibitions involve certain non- bank activities that, by statute or by Federal Reserve regulation or order, have been identified as activities closely related to the business of banking or of managing or controlling banks. Tying Arrangements. We are prohibited from engaging in certain tie-in arrangements in connection with any extension of credit, sale or lease of property or furnishing of services. For example, with certain exceptions, neither the Company nor its subsidiaries may condition an extension of credit to a customer on either (i) a requirement that the customer obtain additional services provided by us; or (ii) an agreement by the customer to refrain from obtaining other services from a competitor. Support of Subsidiary Banks. Under Federal Reserve policy,yy as codified by the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”), the Company is required to act as a source of financial and managerial strength to Columbia Bank, including at times when we may not be in a financial position to provide such resources, and it may not be in our, or our shareholders’, best interests to do so. This means that the Company is required to commit, as necessary,yy resources to support Columbia Bank. Any capital loans a bank holding company makes to its subsidiary banks are subordinate to deposits and to certain other indebtedness of those subsidiary banks. State Law Restrictions. As a Washington corporation, the Company is subject to certain limitations and restrictions under applicable Washington corporate law. For example, state law restrictions in Washington include limitations and restrictions relating to indemnification of directors, distributions to shareholders, transactions involving directors, officers or interested shareholders, maintenance of books, records, and minutes, and observance of certain corporate formalities. ff Federal and State Regulation of Columbia Bank General. The deposits of Columbia Bank, a Washington chartered commercial bank with branches in Washington, Oregon and Idaho, are insured by the FDIC. As a result, Columbia Bank is subject to supervision and regulation by the Washington Department of Financial Institutions’ Division of Banks and the FDIC. These agencies have the authority to prohibit banks from engaging in what they believe constitute unsafe or unsound banking practices. With respect to branches of Columbia Bank in Oregon and Idaho, the Bank is also subject to certain laws and regulations governing its activities in those states. 6 Consumer Protection. The Bank is subject to a variety of federal and state consumer protection laws and regulations that govern its relationship with consumers, including laws and regulations that impose certain disclosure requirements and regulate the manner in which we take deposits, make and collect loans, and provide other services. Failure to comply with these laws and regulations may subject the Bank to various penalties, including but not limited to, enforcement actions, injunctions, fines, civil monetary penalties, criminal penalties, punitive damages, and the loss of certain contractual rights. Columbia Bank has established a compliance management system designed to ensure consumer protection. Community Reinvestment. The CRA requires that, in connection with examinations of financial institutions within their jurisdiction, the Federal Reserve or the FDIC evaluate the record of the financial institution in meeting the credit needs of its local communities, including low and moderate-income neighborhoods, consistent with the safe and sound operation of the institution. A bank’s community reinvestment record is also considered by the applicable banking agencies in evaluating mergers, acquisitions and applications to open a branch or facility. The Bank’s failure to comply with the CRA could, among other things, result in the denial or delay in connection with such transactions. The Bank received a rating of “satisfactory” in its most recently completed CRA examination. Anti-Money Laundering and Anti-Terrorism. TT The Bank Secrecy Act (the “BSA”) requires all financial institutions, including banks to, among other things, establish a risk-based system of internal controls reasonably designed to prevent money laundering and the financing of terrorism. It includes a variety of recordkeeping and reporting requirements (such as cash and suspicious activity reporting) as well as due diligence/know-your-customer documentation requirements. The Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001, intended to combat terrorism, was renewed with certain amendments in 2006 (the “Patriot Act”). The Patriot Act further augments and strengthens the requirements set forth in the BSA. The Patriot Act, in relevant part, (i) prohibits banks from providing correspondent accounts directly to foreign shell banks; (ii) imposes due diligence requirements on banks opening or holding accounts for foreign financial institutions or wealthy foreign individuals; (iii) requires financial institutions to establish an anti-money-laundering compliance program; and (iv) eliminates civil liability for persons who file suspicious activity reports. The Patriot Act also includes provisions providing the government with power to investigate terrorism, including expanded government access to bank account records. Columbia Bank has established compliance programs designed to comply with the BSA and the Patriot Act. ff Transactions with Affiliates; Insider Credit Transactions. Transactions between the Bank and its subsidiaries, on the one hand, and the Company or any other subsidiary,yy on the other hand, are regulated under federal banking law. The Federal Reserve Act imposes quantitative and qualitative requirements and collateral requirements on covered transactions by the Bank with, or for the benefit of, its affiliates. extensions of credit to the holding company or its subsidiaries, on investments in securities of the holding company or its subsidiaries and on the use of their securities as collateral for loans to any borrower. These regulations and restrictions may limit the Company’s ability to obtain funds from Columbia Bank for its cash needs, including funds for payment of dividends, interest and operational expenses. In addition, subsidiary banks of a bank holding company are subject to restrictions on ff Banks are also subject to certain restrictions imposed by the Federal Reserve Act on extensions of credit to executive directors, principal shareholders or any related interests of such persons. Extensions of credit (i) must be made on officers, ff substantially the same terms, including interest rates and collateral, and follow credit underwriting procedures that are at least as stringent as those prevailing at the time for comparable transactions with persons not related to the lending bank; and (ii) must not involve more than the normal risk of repayment or present other unfavorable features. Banks are also subject to certain lending limits and restrictions on overdrafts to insiders. A violation of these restrictions may result in the assessment of substantial civil monetary penalties, regulatory enforcement actions, and other regulatory sanctions. The Columbia Bank board has established controls to ensure compliance with regulatory expectations around affiliated transactions. ff Regulation of Management. Federal law (i) sets forth circumstances under which officers ff or directors of a bank may be removed by the institution’s federal supervisory agency; (ii) places restraints on lending by a bank to its executive officers, directors, principal shareholders, and their related interests; and (iii) generally prohibits management personnel of a bank from serving as directors or in other management positions of another financial institution whose assets exceed a specified amount or which has an office within a specified geographic area. ff ff Safety and Soundness Standards. Certain non-capital safety and soundness standards are also imposed upon banks. These standards cover internal controls, information systems and internal audit systems, loan documentation, credit underwriting, interest rate exposure, asset growth, compensation, fees and benefits, such other operational and managerial standards as the agency determines to be appropriate, and standards for asset quality,yy earnings and stock valuation. An institution that fails to meet these standards may be subject to regulatory sanctions, including limitations on growth. Columbia Bank has established policies and risk management activities designed to ensure the safety and soundness of the Bank. 7 Interstate Banking and Branching The Riegle-Neal Interstate Banking and Branching Efficiency ff Act of 1994 (the “Interstate Act”) together with the Dodd- Frank Act relaxed prior interstate branching restrictions under federal law by permitting, subject to regulatory approval, state and federally chartered commercial banks to establish branches in states where the laws permit banks chartered in such states to establish branches. The Interstate Act requires regulators to consult with community organizations before permitting an interstate institution to close a branch in a low-income area. Federal banking agency regulations prohibit banks from using their interstate branches primarily for deposit production and the federal banking agencies have implemented a loan-to-deposit ratio screen to ensure compliance with this prohibition. Dividends and Stress Testing Columbia is a legal entity separate and distinct from the Bank and its other subsidiaries. As a bank holding company,yy Columbia is subject to certain restrictions on its ability to pay dividends under applicable banking laws and regulations. Federal bank regulators are authorized to determine under certain circumstances relating to the financial condition of a bank holding company or a bank that the payment of dividends would be an unsafe or unsound practice and to prohibit payment thereof. In particular, federal bank regulators have stated that paying dividends that deplete a banking organization’s capital base to an inadequate level would be an unsafe and unsound banking practice and that banking organizations should generally pay dividends only out of current operating earnings. In addition, in the current financial and economic environment, the Federal Reserve has indicated that bank holding companies should carefully review their dividend policy and has discouraged payment ratios that are at maximum allowable levels unless both asset quality and capital are very strong. A significant portion of our income comes from dividends from the Bank, which is also the primary source of our liquidity. In addition to the restrictions discussed above, the Bank is subject to limitations under Washington law regarding the level of dividends that it may pay to us. Washington law limits a bank’s ability to pay dividends that are greater than the bank’s retained earnings without approval of the applicable banking agency. In October 2012, as required by the Dodd-Frank Act, the Federal Reserve and the FDIC published final rules regarding company-run stress testing. These rules require bank holding companies and banks with average total consolidated assets greater than $10 billion over a specified period of time to conduct an annual company-run stress test of capital, consolidated earnings and losses under one base and at least two stress scenarios provided by the federal bank regulators. As a result of the acquisition of Pacific Continental, we now have greater than $10 billion in total consolidated assets. We expect that the Federal Reserve, the FDIC and the Washington Department of Financial Institutions’ Division of Banks will consider the results of those stress testing requirements as an important factor in evaluating our capital adequacy and that of the Bank, in evaluating any proposed acquisitions and in determining whether any proposed dividends or stock repurchases by us or by the Bank may be an unsafe or unsound practice. Columbia will be required to publish its first stress test results in 2019. Regulatory Capital Requirements The Federal Reserve monitors the capital adequacy of the Company on a consolidated basis, and the FDIC and the Washington Department of Financial Institutions’ Division of Banks monitor the capital adequacy of the Bank. The risk-based capital standards currently applicable to the Company and the Bank, parts of which are subject to phase-in, are based on the December 2010 final capital framework for strengthening international capital standards, known as Basel III, of the Basel Committee on Banking Supervision (the “Basel Committee”). We believe that, as of December 31, 2017, we and the Bank would meet all capital adequacy requirements under the New Capital Rules, as described below,ww on a fully phased-in basis as if such requirements were then in effect. ff Prior to January 1, 2015, the risk-based capital standards applicable to the Company and the Bank were based on the 1988 Capital Accord, known as Basel I, of the Basel Committee. In July 2013, the federal bank regulators approved final rules implementing Basel III and various provisions of the Dodd-Frank Act (the “New Capital Rules”). The New Capital Rules substantially revised the risk-based capital requirements applicable to bank holding companies and banks, including us and the at December 31, 2014. The New Capital Rules revised the components Bank, compared to the risk-based capital rules in effect the numerator in regulatory capital ratio calculations. The New Capital Rules of capital and addressed other issues affecting also addressed risk weights and other issues affecting the denominator in regulatory capital ratio calculations, including by ff replacing the prior risk-weighting approach derived from Basel I with a more risk-sensitive approach based, in part, on the standardized approach adopted by the Basel Committee in its 2004 capital accords, known as Basel II. The New Capital Rules also implemented the requirements of Section 939A of the Dodd-Frank Act to remove references to credit ratings from the federal bank regulators’ rules. Subject to a phase-in period for various provisions, the New Capital Rules, became effective us and for the Bank on January 1, 2015. for ff ff ff 8 The New Capital Rules, among other things (i) include a new capital measure called Common Equity Tier 1 (“CET1”), (ii) specify that Tier 1 capital consists of CET1 and “Additional Tier 1 capital” instruments meeting specified requirements, (iii) define CET1 narrowly by requiring that most deductions/adjustments to regulatory capital measures be made to CET1 and not to the other components of capital and (iv) expand the scope of the deductions/adjustments to capital as compared to existing regulations. Under the New Capital Rules, the minimum capital ratios as of January 1, 2015 are (i) 4.5% CET1 to risk-weighted assets, (ii) 6% Tier 1 capital (that is, CET1 plus Additional Tier 1 capital) to risk-weighted assets and (iii) 8% total capital (that is, Tier 1 capital plus Tier 2 capital) to risk-weighted assets. The New Capital Rules also require a new capital conservation buffer ff designed to absorb losses during periods of ff economic stress. The capital conservation buffer applicable only to certain covered ratios. In addition, the New Capital Rules provide for a countercyclical capital buffer institutions. We do not expect the countercyclical capital buffer to be applicable to the Company or the Bank. Banking ff institutions with a ratio of CET1 to risk-weighted assets above the minimum but below the capital conservation buffer , when the latter is applied) will face below the combined capital conservation buffer constraints on dividends, equity repurchases and compensation based on the amount of the shortfall. is composed entirely of CET1, on top of these minimum risk-weighted asset and countercyclical capital buffer (or ff ff ff ff The implementation of the capital conservation buffer began on January 1, 2016 at the 0.625% level and will be phased in over a three-year period (increasing by 0.625% on each subsequent January 1, until it reaches 2.5% on January 1, 2019). When fully phased-in, the New Capital Rules will require the Company and the Bank to maintain such additional capital conservation buffer resulting in minimum ratios of (i) 7% CET1 to risk-weighted assets, (ii) 8.5% Tier 1 capital ff to risk-weighted assets, and (iii) 10.5% total capital to risk-weighted assets. The New Capital Rules also eliminate the more permissive 3% minimum Tier 1 leverage ratio under the capital guidelines that were in effect resulting in a 4% minimum Tier 1 leverage ratio for all bank holding companies and banks. of 2.5% of CET1, effectively through December 31, 2014, ff ff ff The New Capital Rules provide for a number of deductions from and adjustments to CET1. These include, for example, the requirement that mortgage servicing rights, certain deferred tax assets and significant investments in non-consolidated financial entities be deducted from CET1 to the extent that any one such category exceeds 10% of CET1 or all such categories in the aggregate exceed 15% of CET1. Implementation of the deductions and other adjustments to CET1 began on January 1, 2015 and will be phased in over a four-year period (beginning at 40% on January 1, 2015 and an additional 20% per year thereafter). The New Capital Rules also generally preclude certain hybrid securities, such as trust preferred securities, from being counted as Tier 1 capital for most bank holding companies. However, bank holding companies such as us who had less than $15 billion in assets as of December 31, 2009 (and who continue to have less than $15 billion in assets) are permitted to include trust preferred securities issued prior to May 19, 2010 as Additional Tier 1 capital under the New Capital Rules. The New Capital Rules also prescribe a new standardized approach for risk weightings that expands the risk-weighting categories from four Basel I-derived categories (0%, 20%, 50% and 100%) to a much larger and more risk-sensitive number of categories, depending on the nature of the assets, generally ranging from 0% for U.S. government and agency securities to 600% for certain equity exposures and resulting in higher risk weights for a variety of asset categories. With respect to the Bank, the New Capital Rules also revise the prompt corrective action regulations pursuant to Section 38 of the Federal Deposit Insurance Act (the “FDIA”). See “Prompt Corrective Action Framework.” Liquidity Requirements Historically,yy the regulation and monitoring of bank and bank holding company liquidity has been addressed as a supervisory matter, without required formulaic measures. The Basel III final framework requires banks and bank holding companies to measure their liquidity against specific liquidity tests that, although similar in some respects to liquidity measures historically applied by banks and regulators for management and supervisory purposes, going forward would be required by regulation. One test, referred to as the liquidity coverage ratio, is designed to ensure that the banking entity maintains an adequate level of unencumbered high-quality liquid assets equal to the entity’s expected net cash outflow for a 30-day time horizon (or, if greater, 25% of its expected total cash outflow) under an acute liquidity stress scenario. The other test, referred to as the net stable funding ratio, is designed to promote more medium- and long-term funding of the assets and activities of banking entities over a one-year time horizon. In the second quarter of 2016, the federal banking regulators issued a proposed rule that would implement the net stable funding ratio for certain U.S. banking organizations. The proposed rule would require certain U.S. banking organizations to ensure they have access to stable funding over a one-year time horizon. The proposed rule would not apply to U.S. banking organizations with less than $50 billion in total consolidated assets such as the Company and the Bank. The federal banking regulators have not released the final rule. 9 Prompt Corrective Action Framework The FDIA requires the federal bank regulators to take prompt corrective action in respect of depository institutions that fail to meet specified capital requirements. The FDIA establishes five capital categories (“well-capitalized,” “adequately capitalized,” “undercapitalized,” “significantly undercapitalized” and “critically undercapitalized”), and the federal bank regulators are required to take certain mandatory supervisory actions, and are authorized to take other discretionary actions, with respect to institutions that are undercapitalized, significantly undercapitalized or critically undercapitalized. The severity of these mandatory and discretionary supervisory actions depends upon the capital category in which the institution is placed. Generally,yy subject to a narrow exception, the FDIA requires the regulator to appoint a receiver or conservator for an institution that is critically undercapitalized. Under the rules currently in effect ff and as modified by the New Capital Rules, an insured depository institution generally would be classified in the following categories based on the capital measures indicated: “Well-capitalized” WW Total capital ratio of at least 10%, Tier 1 capital ratio of at least 8%, CET1 ratio of at least 6.5% Tier 1 leverage ratio of at least 5%, and Not subject to any order or written directive requiring a specific capital level. “Adequately capitalized” Total capital ratio of at least 8%, Tier 1 capital ratio of at least 6% CET1 ratio of at least 4.5%, and Tier 1 leverage ratio of at least 4%. “Undercapitalized” Total capital ratio of less than 8%, Tier 1 capital ratio of less than 6% CET1 ratio of less than 4.5%, or Tier 1 leverage ratio of less than 4%. “Significantly undercapitalized” Total capital ratio of less than 6%, Tier 1 capital ratio of less than 4% CET1 ratio of less than 3%, or Tier 1 leverage ratio of less than 3%. “Critically undercapitalized” Tangible equity to average quarterly tangible assets of 2% or less. An institution may be downgraded to, or deemed to be in, a capital category that is lower than indicated by its capital ratios if it is determined to be in an unsafe or unsound condition or if it receives an unsatisfactory examination rating with respect to certain matters. A bank’s capital category is determined solely for the purpose of applying prompt corrective action regulations, and the capital category may not constitute an accurate representation of the bank’s overall financial condition or prospects for other purposes. As of December 31, 2017, we and the Bank were well-capitalized with CET1 capital ratios of 11.7421% and 12.0133%, respectively,yy Tier 1 capital ratios of 11.8196% and 12.0133%, respectively,yy total capital ratios of 12.9796% and 12.8123%, respectively,yy and Tier 1 leverage ratios of 10.9611% and 10.8186%, respectively. An institution that is categorized as undercapitalized, significantly undercapitalized or critically undercapitalized is required to submit an acceptable capital restoration plan to its appropriate federal bank regulator. Under the FDIA, in order for the capital restoration plan to be accepted by the appropriate federal banking agency,yy a bank holding company must guarantee that a subsidiary depository institution will comply with its capital restoration plan, subject to certain limitations. The bank holding company must also provide appropriate assurances of performance. The obligation of a controlling bank holding company under the FDIA to fund a capital restoration plan is limited to the lesser of 5% of an undercapitalized subsidiary’s assets or the amount required to meet regulatory capital requirements. An undercapitalized institution is also generally prohibited from increasing its average total assets, making acquisitions and capital distributions, establishing any branches or engaging in any new line of business, except in accordance with an accepted capital restoration plan or with the approval of the FDIC. Institutions that are undercapitalized or significantly undercapitalized and either fail to submit an acceptable capital restoration plan or fail to implement an approved capital restoration plan may be subject to a number of requirements and restrictions, including orders to sell sufficient and cessation of receipt of deposits from correspondent banks. Critically undercapitalized depository institutions failing to submit or implement an acceptable capital restoration plan are subject to appointment of a receiver or conservator. voting stock to become adequately capitalized, requirements to reduce total assets ff 10 In addition, the FDIA prohibits an insured depository institution from accepting brokered deposits or offering interest rates on any deposits significantly higher than the prevailing rate in the bank’s normal market area or nationally (depending upon where the deposits are solicited), unless it is well-capitalized or is adequately capitalized and receives a waiver from the FDIC. A depository institution that is adequately capitalized and accepts brokered deposits under a waiver from the FDIC may not pay an interest rate on any deposit in excess of 75 basis points over certain prevailing market rates. ff Regulatory Oversight and Examination The Federal Reserve conducts periodic inspections of bank holding companies. The supervisory objectives of the inspection program are to ascertain whether the financial strength of the bank holding company is being maintained on an ongoing basis and to determine the effects or consequences of transactions between a holding company or its non-banking ff subsidiaries and its subsidiary banks. Banks are subject to periodic examinations by their primary regulators. Bank examinations have evolved from reliance on transaction testing in assessing a bank’s condition to a risk-focused approach. These examinations are extensive and cover the entire breadth of operations of the bank. Generally,yy FDIC safety and soundness examinations for a bank of our size are completed on an annual basis through the execution of a quarterly focal review process. The FDIC and state bank regulatory agencies complete these examinations on a combined schedule. The Consumer Financial Protection Bureau (the “CFPB”) has primary examination and enforcement authority over institutions with assets of $10 billion or more. Our consolidated assets exceeded $10 billion following the acquisition of Pacific Continental and we are now subject to CFPB examination of our Bank and enforcement with respect to various federal consumer protection laws, as well as continued examination by the FCIC on certain consumer regulations. State authorities are also responsible for monitoring our compliance with all state consumer laws. The frequency of consumer compliance and CRA examinations is linked to the size of the institution and its compliance and CRA ratings at its most recent examinations. However, the examination authority of the Federal Reserve and the FDIC allows them to examine supervised banks as frequently as deemed necessary based on the condition of the bank or as a result of certain triggering events. Corporate Governance and Accounting The Sarbanes-Oxley Act of 2002 (“SOX”) addresses, among other things, corporate governance, auditing and accounting, ff and chief financial officers enhanced and timely disclosure of corporate information, and penalties for non-compliance. Generally,yy SOX (i) requires chief executive officers specific and enhanced corporate disclosure requirements; (iii) accelerates the time frame for reporting of insider transactions and periodic disclosures by public companies; (iv) requires companies to adopt and disclose information about corporate governance practices, including whether or not they have adopted a code of ethics for senior financial officers audit committee includes at least one “audit committee financial expert;” and (v) requires the SEC, based on certain enumerated factors, to regularly and systematically review corporate filings. to certify to the accuracy of periodic reports filed with the SEC; (ii) imposes and whether the ff ff Deposit Insurance The Bank’s deposits are insured under the FDIA, up to the maximum applicable limits and are subject to deposit insurance assessments designed to tie what banks pay for deposit insurance to the risks they pose. The Dodd-Frank Act broadened the base for FDIC insurance assessments. Assessments are now based on the average consolidated total assets less tangible equity capital of a financial institution. In addition, the Dodd-Frank Act raised the minimum designated reserve ratio (the FDIC is required to set the reserve ratio each year) of the Deposit Insurance Fund (the “DIF”) from 1.15% to 1.35%; required that the DIF meet that minimum ratio of insured deposits by 2020; and eliminated the requirement that the FDIC pay dividends to insured depository institutions when the reserve ratio exceeds certain thresholds. In August 2016, the FDIC announced that the DIF reserve ratio had surpassed 1.15% as of June 30, 2016. As a result, beginning in the third quarter of 2016, the range of initial assessment ranges for all institutions was adjusted downward such that the initial base deposit insurance assessment rate ranges from 3 to 30 basis points on an annualized basis. After the effect of potential base-rate adjustments, the total base assessment rate could range from 1.5 to 40 basis points on an annualized basis. In March 2016, the FDIC adopted a final rule increasing the reserve ratio for the DIF to 1.35% of total insured deposits. The rule imposes a surcharge on the assessments of depository institutions with $10 billion or more in assets beginning in the third quarter of 2016 and continuing through the earlier of the quarter that the reserve ratio first reaches or exceeds 1.35% and December 31, 2018. ff 11 The Dodd-Frank Act As a result of the financial crisis, on July 21, 2010, the Dodd-Frank Act was signed into law. The Dodd-Frank Act significantly changed the bank regulatory structure and is affecting activities of financial institutions and their holding companies, including the Company and Columbia Bank. The full impact of the Dodd-Frank Act may not be known for years. Some of the provisions of the Dodd-Frank Act that may impact our business are summarized below. the lending, deposit, investment, trading and operating ff Corporate Governance. The Dodd-Frank Act requires publicly traded companies to provide their shareholders with (i) a non-binding shareholder vote on executive compensation, (ii) a non-binding shareholder vote on the frequency of such vote, (iii) disclosure of “golden parachute” arrangements in connection with specified change in control transactions, and (iv) a non- binding shareholder vote on golden parachute arrangements in connection with these change in control transactions. Prohibition Against Charter Conversions of Troubled Institutions. The Dodd-Frank Act generally prohibits a depository institution from converting from a state to federal charter, or vice versa, while it is subject to an enforcement action unless the bank seeks prior approval from its regulator and complies with specified procedures to ensure compliance with the enforcement action. Consumer Financial Protection Bureau. As described above, we are subject to oversight and examination by the CFPB because our total consolidated assets exceed $10 billion. Repeal of Demand Deposit Interest Prohibition. The Dodd-Frank Act repealed the federal prohibitions on the payment of interest on demand deposits, thereby permitting depository institutions to pay interest on business transaction and other accounts. The Volcker Rule. The Dodd-Frank Act prohibits banks and their affiliates from engaging in proprietary trading and investing in and sponsoring hedge funds and private equity funds. The statutory provision is commonly called the “Volcker Rule.” The Volcker Rule does not significantly impact the operations of the Company and the Bank, as we do not have any significant engagement in the businesses prohibited by the Volcker Rule. VV ff Interchange Fees. Under the Durbin Amendment to the Dodd-Frank Act, the Federal Reserve adopted rules establishing standards for assessing whether the interchange fees that may be charged with respect to certain electronic debit transactions are “reasonable and proportional” to the costs incurred by issuers for processing such transactions. Interchange fees, or “swipe” fees, are charges that merchants pay to us and other card-issuing banks for processing electronic payment transactions. Under the final rules, the maximum permissible interchange fee is equal to no more than 21 cents plus 5 basis points of the transaction value for many types of debit interchange transactions. The Federal Reserve also adopted a rule to allow a debit card issuer to recover one cent per transaction for fraud prevention purposes if the issuer complies with certain fraud-related requirements required by the Federal Reserve. The Federal Reserve also has rules governing routing and exclusivity that require issuers to offer ff or prepaid product. networks for routing transactions on each debit ff two unaffiliated Previously,yy we qualified for the small issuer exemption from the interchange fee cap, which applies to any debit card issuer that, together with its affiliates, year. As a result of the acquisition of Pacific Continental, we have consolidated assets exceeding $10 billion and we will be subject to the interchange fee cap beginning July 1, 2018. We currently anticipate a pre-tax annual impact of approximately $10 million because we will no longer qualify for the small issuer exemption. has total consolidated assets of less than $10 billion as of the end of the previous calendar ff 12 Heightened Requirements for Bank Holding Companies with $10 Billion or More in Assets Various federal banking laws and regulations, including rules adopted by the Federal Reserve pursuant to the requirements of the Dodd-Frank Act, impose heightened requirements on certain large banks and bank holding companies. Most of these rules apply primarily to bank holding companies with at least $50 billion in total consolidated assets, but certain rules also apply to banks and bank holding companies with at least $10 billion in total consolidated assets. With the acquisition of Pacific Continental on November 1, 2017, Columbia’s consolidated assets exceeded $10 billion. Because our Bank’s total consolidated assets equal or exceed $10 billion, we or our Bank, as applicable, will, among other requirements: • • • • be required to perform annual stress tests as described above in “Dividends; Stress Testing;” be required to establish a dedicated risk committee of our board of directors responsible for overseeing our enterprise-wide risk management policies, which must be commensurate with our capital structure, risk profile, complexity,yy activities, size and other appropriate risk-related factors, and including as a member at least one risk management expert; calculate our FDIC deposit assessment base using a performance score and a loss-severity score system; and be examined for compliance with federal consumer protection laws primarily by the CFPB. Prior to exceeding $10 billion or more in total consolidated assets, Columbia began analyzing these requirements and developing systems and action plans to ensure we are prepared to comply with the rules when and if they become applicable. For instance, we have already established a dedicated risk committee as described above. Incentive Compensation The Dodd-Frank Act requires the federal bank regulators and the SEC to establish joint regulations or guidelines prohibiting incentive-based payment arrangements at specified regulated entities, including us and the Bank, having at least $1 billion in total assets that encourage inappropriate risks by providing an executive officer stockholder with excessive compensation, fees, or benefits or that could lead to material financial loss to the entity. In addition, these regulators must establish regulations or guidelines requiring enhanced disclosure to regulators of incentive-based compensation arrangements. , employee, director or principal ff In June 2010, the Federal Reserve and FDIC issued comprehensive final guidance on incentive compensation policies intended to ensure that the incentive compensation policies of banking organizations do not undermine the safety and soundness of such organizations by encouraging excessive risk-taking. The guidance, which covers all employees that have the ability to materially affect principles that a banking organization’s incentive compensation arrangements should (i) provide incentives that appropriately balance risk and financial results in a manner that does not encourage employees to expose their organizations to imprudent risk, (ii) be compatible with effective governance, including active and effective the risk profile of an organization, either individually or as part of a group, is based upon the key internal controls and risk management and (iii) be supported by strong corporate oversight by the organization’s board of directors. ff ff ff During the second quarter of 2016, the U.S. financial regulators, including the Federal Reserve and the Securities and Exchange Commission (“SEC”), proposed revised rules on incentive-based payment arrangements at specified regulated entities having at least $1 billion in total assets. The proposed revised rules would establish general qualitative requirements applicable to all covered entities, which would include (i) prohibiting incentive arrangements that encourage inappropriate risks by providing excessive compensation; (ii) prohibiting incentive arrangements that encourage inappropriate risks that could lead to a material financial loss; (iii) establishing requirements for performance measures to appropriately balance risk and reward; (iv) requiring board of director oversight of incentive arrangements; and (v) mandating appropriate record-keeping. Under the proposed rule, larger financial institutions with total consolidated assets of at least $50 billion would also be subject to additional requirements applicable to such institutions’ “senior executive officers” If the rules are adopted in the form proposed, they may restrict our flexibility with respect to the manner in which we structure compensation and adversely affect our ability to compete for talent. and “significant risk-takers.” ff ff The Federal Reserve will review,ww as part of the regular, risk-focused examination process, the incentive compensation arrangements of banking organizations, such as us, that are not “large, complex banking organizations.” These reviews will be tailored to each organization based on the scope and complexity of the organization’s activities and the prevalence of incentive compensation arrangements. The findings of the supervisory initiatives will be included in reports of examination. Deficiencies will be incorporated into the organization’s supervisory ratings, which can affect the organization’s ability to make acquisitions and take other actions. Enforcement actions may be taken against a banking organization if its incentive compensation arrangements, or related risk management control or governance processes, pose a risk to the organization’s safety and ff soundness and the organization is not taking prompt and effective measures to correct the deficiencies. ff 13 Proposed Legislation Proposed legislation relating to the banking industry is introduced in almost every legislative session. Certain of such the regulation of the banking industry. We cannot predict if any such legislation will be legislation could dramatically affect adopted or if it is adopted how it would affect that new legislation or changes to existing laws or regulations usually results in a greater compliance burden and therefore generally increases the cost of doing business. the business of Columbia Bank or the Company. Recent history has demonstrated ff ff Effects of Government Monetary Policy Our earnings and growth are affected ff not only by general economic conditions, but also by the fiscal and monetary policies of the federal government, particularly the Federal Reserve. The Federal Reserve implements national monetary policy for such purposes as curbing inflation and combating recession, but its open market operations in U.S. government securities, control of the discount rate applicable to borrowings from the Federal Reserve, and establishment of reserve requirements against certain deposits, influence the growth of bank loans, investments and deposits, and also affect loans or paid on deposits. The nature and impact of future changes in monetary policies and their impact on us cannot be predicted with certainty. interest rates charged on ff ITEM 1A. RISK FACTORS The following is a discussion of what we currently believe are the most significant risks and uncertainties that may affect ff our business, financial condition and future results. National and global economic and other conditions could adversely affect our future results of operations or market price of our stock. Our business is directly impacted by factors such as economic, political and market conditions, broad trends in industry and finance, changes in government monetary and fiscal policies and inflation, foreign policy,yy and financial market volatility,yy all of which are beyond our control. Global economies continue to face significant challenges to achieving normalized economic growth rates. Although the pace of recovery of the national economy has begun to accelerate, there are continuing concerns related to the level of U.S. government debt and fiscal actions that may be taken to address that debt. There can be no assurance that economic conditions will continue to improve, and these conditions could worsen. Any renewed deterioration in the economies of the nation as a whole or in our markets would have an adverse effect, business, financial condition, results of operations and prospects, and could also cause the market price of our stock to decline. While it is impossible to predict how long challenging economic conditions may exist, a slow or fragile recovery could continue to present risks into the future for the industry and our company. which could be material, on our ff 14 Economic conditions in the market areas we serve may adversely impact our earnings and could increase our credit risk associated with our loan portfolio, the value of our investment portfolio and the availability of deposits. Substantially all of our loan and deposit customers are businesses and individuals in Washington, Oregon and Idaho, and soft economies in these market areas could have a material adverse effect operations and prospects. A deterioration in the market areas we serve could result in the following consequences, any of which would have an adverse impact, which could be material, on our business, financial condition, results of operations and prospects: on our business, financial condition, results of ff • • • • • • loan delinquencies may increase; problem assets and foreclosures may increase; collateral for loans made may decline in value, in turn reducing customers’ borrowing power, reducing the value of assets and collateral associated with existing loans; certain securities within our investment portfolio could become other than temporarily impaired, requiring a write-down through earnings to fair value, thereby reducing equity; low cost or non-interest bearing deposits may decrease; and demand for our loan and other products and services may decrease. Concentrations within our loan portfolio could result in increased credit risk in a challenging economy.yy While our loan portfolio is diversified across business sectors, it is concentrated in commercial real estate and commercial business loans. These types of loans generally are viewed as having more risk of default than residential real estate loans or certain other types of loans or investments. In fact, the FDIC has issued pronouncements alerting banks of its concern about heavy loan concentrations. Because our loan portfolio contains commercial real estate and commercial business loans with relatively large balances, the deterioration of one or a few of these loans may cause a significant increase in our non-performing loans. An increase in non-performing loans could result in a loss of earnings from these loans, an increase in the provision for loan losses, or an increase in loan charge-offs, business, financial condition, results of operations and prospects. any of which would have an adverse impact, which could be material, on our ff A large percentage of our loan portfolio is secured by real estate, in particular commercial real estate. Deterioration in the real estate market or other segments of our loan portfolio would lead to additional losses. In conjunction with the recent financial crisis, the real estate market experienced a slow-down due to negative economic trends and credit market disruption, from which the market continues to slowly recover. At December 31, 2017, 61% of our total gross loans, were secured by real estate. Any renewed downturn in the economies or real estate values in the markets we serve could have a material adverse effect securing such loans. Our ability to recover on defaulted loans would then be diminished, and we would be more likely to suffer losses on defaulted loans, any or all of which would have an adverse impact, which could be material, on our business, financial condition, results of operations and prospects. on both borrowers’ ability to repay their loans and the value of the real property ff ff Our allowance for loan and lease losses (“ALLL”) may not be adequate to cover future loan losses, which could adversely affect earnings. We maintain an ALLL in an amount that we believe is adequate to provide for losses inherent in our loan portfolio. While we strive to carefully monitor credit quality and to identify loans that may become non-performing, at any time there are loans in the portfolio that could result in losses, but that have not been identified as non-performing or potential problem loans. We cannot be sure that we will be able to identify deteriorating loans before they become non-performing assets, or that we will be able to limit losses on those loans that have been identified. Additionally,yy the process for determining the ALLL requires different, ability of borrowers to repay their loans. As a result, future significant increases to the ALLL may be necessary. subjective and complex judgments about the future impact from current economic conditions that might impair the ff Future increases to the ALLL may be required based on changes in the composition of the loans comprising the portfolio, deteriorating values in underlying collateral (most of which consists of real estate) and changes in the financial condition of borrowers, such as may result from changes in economic conditions, or as a result of actual future events differing from assumptions used by management in determining the ALLL. Additionally,yy banking regulators, as an integral part of their supervisory function, periodically review our ALLL. These regulatory agencies may require us to increase the ALLL. Any increase in the ALLL would have an adverse effect, operations. which could be material, on our financial condition and results of ff ff 15 Nonperforming assets take significant time to resolve and could adversely affect our results of operations and financial condition. ff Our nonperforming assets adversely affect our net income in various ways. We do not record interest income on our income and increasing loan administration costs. Assets acquired by ff nonaccrual loans, thereby adversely affecting foreclosure or similar proceedings are recorded at fair value less estimated costs to sell. The valuation of these foreclosed assets is periodically updated and resulting losses, if any,yy are charged to earnings in the period in which they are identified. An increase in the level of nonperforming assets also increases our risk profile and may impact the capital levels our regulators believe is appropriate in light of such risks. We utilize various techniques such as loan sales, workouts, and restructurings to manage our problem assets. Decreases in the value of these problem assets, the underlying collateral, or in the borrowers’ performance or financial condition would have an adverse impact, which could be material, on our business, financial condition, results of operations and prospects. In addition, the resolution of nonperforming assets requires significant commitments of time from management and staff,ff which can be detrimental to performance of their other responsibilities. We may experience increases in nonperforming loans in the future. Our acquisitions, including our recent acquisition of Pacific Continental, and the integration of acquired businesses subject us to various risks and may not result in all of the benefits anticipated, and future acquisitions may be dilutive to current shareholders. We have in the past and may in the future seek to grow our business by acquiring other businesses. On November 1, 2017, we completed our acquisition of Pacific Continental. Our acquisitions may not have the anticipated positive results, including results relating to: correctly assessing the asset quality of the assets being acquired; the total cost of integration including management attention and resources; the time required to complete the integration successfully; the amount of longer-term cost savings; being able to profitably deploy funds acquired in an acquisition; or the overall performance of the combined entity. We also may encounter difficulties ff in obtaining required regulatory approvals and unexpected contingent liabilities can arise from the businesses we acquire. Integration of an acquired business can be complex and costly,yy sometimes including combining relevant accounting and data processing systems and management controls, as well as managing relevant relationships with employees, clients, suppliers and other business partners. Integration efforts attention and resources, which could adversely affect could divert management our operations or results. ff ff Acquisitions may also result in business disruptions that cause us to lose customers or cause customers to remove their accounts from us and move their business to competing financial institutions. It is possible that the integration process related to acquisitions could result in the disruption of our ongoing businesses or inconsistencies in standards, controls, procedures and our ability to maintain relationships with clients, customers, depositors and employees. The policies that could adversely affect our ability to successfully conduct our business. loss of key employees in connection with an acquisition could adversely affect ff ff We may engage in additional future acquisitions involving the issuance of additional common stock and/or cash. Any such acquisitions and related issuances of stock may have a dilutive effect percentage ownership of current shareholders. The use of cash as consideration in any such acquisitions could impact our capital position and may require us to raise additional capital. on earnings per share, book value per share or the ff Furthermore, notwithstanding our recent acquisitions, we cannot provide any assurance as to the extent to which we can continue to grow through acquisitions as this will depend on the availability of prospective target opportunities at valuations we find attractive. In addition, the Northwest is experiencing intensified consolidation and we face significant competition from numerous other financial services institutions for attractive acquisition candidates, as many of these competitors will have greater financial resources than we do. Our assumptions regarding the fair value of assets acquired could be inaccurate, which could materially and adversely affect our business, financial condition, results of operations, and future prospects. Management makes various assumptions and judgments about the collectability of acquired loans, including the creditworthiness of borrowers and the value of the real estate and other assets serving as collateral for the repayment of secured loans. If our assumptions are incorrect, significant earnings volatility can occur and credit loss provisions may be needed to economic conditions or adverse developments in the acquired loan portfolio. Any increase in future loan respond to different losses could have a material adverse impact on our business, financial condition, results of operations and prospects. ff 16 Our management of capital could adversely affect profitability measures and the market price of our common stock and could dilute the holders of our outstanding common stock. Our capital ratios are significantly higher than regulatory minimums. We may lower our capital ratios through either selective acquisitions that meet our disciplined criteria, organic loan growth, investment in securities, or a combination of all three. We continually evaluate opportunities to expand our business through strategic acquisitions. There can be no assurance that we will be able to negotiate future acquisitions on terms acceptable to us. Conversely,yy there may be circumstances under which it would be prudent to consider alternatives for raising capital to take advantage of significant acquisition opportunities or in response to changing economic conditions. In addition, we may need to raise additional capital in the future to have sufficient our business needs and future growth, particularly if the quality of our assets or earnings were to deteriorate significantly. We may not be able to raise additional capital when needed on terms acceptable to us or at all. Our ability to raise additional capital, if needed, will depend on, among other things, conditions in the capital markets at the time, which are outside our control, and our financial performance. Further, if we need to raise capital in the future, we may have to do so when many other financial institutions are also seeking to raise capital and would then have to compete with those institutions for investors. An inability to raise additional capital on acceptable terms when needed could have a material adverse effect financial condition, results of operations and prospects. In addition, any capital raising alternatives could dilute the holders of our outstanding common stock and may adversely affect capital resources and liquidity to meet our commitments and fund the market price of our common stock. on our business, ff ff ff If the goodwill we have recorded in connection with acquisitions becomes impaired, it could have a material adverse impact on our earnings and shareholders’ equity.yy Accounting standards require that we account for acquisitions using the acquisition method of accounting. Under acquisition accounting, if the purchase price of an acquired company exceeds the fair value of its net assets, the excess is carried on the acquirer’s balance sheet as goodwill. In accordance with generally accepted accounting principles, our goodwill is evaluated for impairment on an annual basis or more frequently if events or circumstances indicate that a potential impairment exists. Such evaluation may be based on a variety of factors, including the quoted price of our common stock, market prices of common stock of other banking organizations, common stock trading multiples, discounted cash flows, and data from comparable acquisitions. Future evaluations of goodwill may result in impairment and ensuing write-downs, which could have a material adverse impact on our earnings and shareholders’ equity. Fluctuating interest rates could adversely affect our business. Significant increases in market interest rates on loans, or the perception that an increase may occur, could adversely affect ff both our ability to originate new loans and our ability to grow. Conversely,yy decreases in interest rates could result in an acceleration of loan prepayments. An increase in market interest rates could also adversely affect borrowers to meet their higher payment obligations. If this occurred, it could cause an increase in nonperforming assets and charge offs, ff which could adversely affect the ability of our floating-rate our business. ff ff Further, our profitability is dependent to a large extent upon net interest income, which is the difference ff (or “spread”) between the interest earned on loans, securities and other interest-earning assets and the interest paid on deposits, borrowings, and other interest-bearing liabilities. Because of the differences earning assets and interest-bearing liabilities, changes in interest rates do not produce equivalent changes in interest income earned on interest-earning assets and interest paid on interest-bearing liabilities. Accordingly,yy fluctuations in interest rates could adversely affect in maturities and repricing characteristics of our interest- our interest rate spread, and, in turn, our profitability. ff ff Our business depends on our ability to successfully manage credit risk. ff to ensure repayment. In addition, there are risks inherent in making any loan, including risks with respect to The operation of our business requires us to manage credit risk. As a lender, we are exposed to the risk that our borrowers will be unable to repay their loans according to their terms, and that the collateral securing repayment of their loans, if any,yy may not be sufficient the period of time over which the loan may be repaid, risks relating to proper loan underwriting, risks resulting from changes in economic and industry conditions and risks inherent in dealing with individual borrowers. In order to successfully manage credit risk, we must, among other things, maintain disciplined and prudent underwriting standards and ensure that our bankers follow those standards. The weakening of these standards for any reason, such as an attempt to attract higher yielding loans, a lack of discipline or diligence by our employees in underwriting and monitoring loans, the inability of our employees to adequately adapt policies and procedures to changes in economic or any other conditions affecting our loan portfolio, may result in loan defaults, foreclosures and additional charge-offsff ALLL, each of which could adversely affect have a material adverse effect borrowers and the quality of and may necessitate that we increase our our net income. As a result, our inability to successfully manage credit risk could on our business, financial condition, results of operations and prospects. ff ff ff 17 We operate in a highly regulated environment and changes to or increases in, or supervisory enforcement of, banking or other laws and regulations or governmental fiscal or monetary policies could adversely affect us. ff our powers, authority and operations may be enacted or adopted in the future, which ff on our business, financial condition, results of operations and prospects. Failure to We are subject to extensive regulation, supervision and examination by federal and state banking authorities. In addition, as a publicly-traded company,yy we are subject to regulation by the SEC. Any change in applicable regulations or federal, state or local legislation or in policies or interpretations or regulatory approaches to compliance and enforcement, income tax laws and accounting principles could have a substantial impact on us and our operations. Changes in laws and regulations may also increase our expenses by imposing additional fees or taxes or restrictions on our operations. Additional legislation and regulations that could significantly affect could have a material adverse effect appropriately comply with any such laws, regulations or principles could result in sanctions by regulatory agencies or damage to our reputation, all of which could adversely affect Dodd-Frank Act was enacted in July 2010. Among other provisions, the legislation (i) created a new Consumer Financial Protection Bureau (the “CFPB”) with broad powers to regulate consumer financial products such as credit cards and mortgages, (ii) created a Financial Stability Oversight Council comprised of the heads of other regulatory agencies, (iii) resulted in new capital requirements from federal banking agencies, (iv) placed new limits on electronic debit card interchange fees and (v) required the SEC and national stock exchanges to adopt significant new corporate governance and executive compensation reforms, some of which have yet to be promulgated. The Dodd-Frank Act and regulations that have been adopted thereunder have increased the overall costs of regulatory compliance, and further Dodd-Frank Act related regulations may lead to additional costs. In addition, the CFPB has broad rulemaking authority and is the principal federal regulatory agency responsible for the supervision and enforcement of a wide range of consumer protection laws for banks with greater than $10 billion in assets. our business, financial condition or results of operations. For example, the ff The New Capital Rules implementing Basel III will be phased in through 2019. The New Capital Rules could have an adverse impact on our financial position and future earnings due to, among other things, the increased capital requirements. Further, regulators have significant discretion and authority to prevent or remedy unsafe or unsound practices or violations of laws or regulations by financial institutions and holding companies in the performance of their supervisory and enforcement duties. Recently,yy these powers have been utilized more frequently due to the national, regional and local economic conditions we are facing. The exercise of regulatory authority may have an adverse impact, which could be material, on our business, financial condition, results of operations and prospects. Additionally,yy our business is affected significantly by the fiscal and monetary policies of the U.S. federal government and its agencies, including the Federal Reserve. ff We cannot accurately predict the full effects ff of recent legislation or the various other governmental, regulatory,yy monetary and fiscal initiatives which have been and may be enacted on the financial markets, on the Company and on the Bank. The terms and costs of these activities, or any worsening of current financial market and economic conditions, could materially and adversely affect our business, financial condition and results of operations, as well as the trading price of our common stock. ff We will be subject to heightened regulatory requirements as we exceeded $10 billion in assets. With the acquisition of Pacific Continental on November 1, 2017, the Bank’s total assets exceeded $10 billion. The Dodd- Frank Act and its implementing regulations impose various additional requirements on bank holding companies with $10 billion or more in total consolidated assets, including compliance with portions of the Federal Reserve’s enhanced prudential oversight requirements and annual stress testing requirements. In addition, banks with $10 billion or more in total consolidated assets, including ours, are primarily examined by the CFPB with respect to various federal consumer financial protection laws and regulations. Previously,yy the Bank was subject to regulations adopted by the CFPB, but the FDIC was primarily responsible for examining our bank’s compliance with consumer protection laws and those CFPB regulations. As a relatively new agency with evolving regulations and practices, there is uncertainty as to how the CFPB’s examination and regulatory authority might impact our business. 18 Compliance with these requirements may necessitate that we hire additional compliance or other personnel, design and implement additional internal controls, or incur other significant expenses, any of which could have a material adverse effect on our business, financial condition or results of operations. Compliance with the annual stress testing requirements, part of which must be publicly disclosed, may also be misinterpreted by the market generally or our customers and, as a result, may adversely affect ff ff regulators may also consider our compliance with these regulatory requirements when examining our operations generally or considering any request for regulatory approval we may make, even requests for approvals on unrelated matters. our stock price or our ability to retain our customers or effectively compete for new business opportunities. Our ff We may be required, in the future, to recognize impairment with respect to investment securities. Our securities portfolio currently includes securities with unrecognized losses. At December 31, 2017, gross unrealized losses in our securities portfolio were $34.3 million. We may continue to observe declines in the fair market value of these securities. Securities issued by certain states and municipalities have recently come under scrutiny due to concerns about credit quality. Although management believes the credit quality of the Company’s state and municipal securities portfolio to be good, there can be no assurance that the credit quality of these securities will not decline in the future. We evaluate the securities portfolio for any other than temporary impairment each reporting period, as required by generally accepted accounting principles in the United States. There can be no assurance, however, that future evaluations of the securities portfolio will not require us to recognize impairment charges with respect to these and other holdings. For example, it is possible that government-sponsored programs to allow mortgages to be refinanced to lower rates could materially adversely impact the yield on our portfolio of mortgage-backed securities, since a significant portion of our investment portfolio is composed of such securities. Substantial competition in our market areas could adversely affect us. Commercial banking is a highly competitive business. We compete with other commercial banks, savings and loan associations, credit unions and finance, insurance and other non-depository companies operating in our market areas. We also experience competition, especially for deposits, from Internet-based banking institutions, which have grown rapidly in recent years. We are subject to substantial competition for loans and deposits from other financial institutions. Some of our competitors are not subject to the same degree of regulation and restriction as we are and/or have greater financial resources than we do. Some of our competitors may have liquidity issues, which could impact the pricing of deposits, loans and other financial products in our markets. Our inability to effectively on our business, financial condition, results of operations and prospects. compete in our market areas could have a material adverse impact ff We may not be able to attract or retain key employees. Our success depends in significant part on the skills of our management team and our ability to retain, recruit and ff motivate key officers and employees. We expect our future success to be driven in large part by the relationships maintained with our clients by our executives and other key employees. Leadership changes will occur from time to time, and we cannot predict whether significant resignations or other departures will occur or whether we will be able to recruit additional qualified personnel. Competition for senior executives and skilled personnel in the financial services and banking industry is intense, which means the cost of hiring, incentivizing and retaining skilled personnel may continue to increase. We need to continue to attract and retain key personnel and to recruit qualified individuals to succeed existing key personnel to ensure the continued growth and successful operation of our business. The unexpected loss of any such employees, or the inability to recruit and retain qualified personnel in the future, could have a material adverse impact on our business, financial condition, results of operations and prospects. In addition, the scope and content of U.S. banking regulators' policies on incentive compensation, as well as changes to these policies, could adversely affect our ability to hire, retain and motivate our key employees. ff 19 Changes in accounting standards could materially impact our financial statements. From time to time, the Financial Accounting Standards Board (the “FASB”) FF and the SEC change the financial accounting and reporting standards that govern the preparation of our financial statements. These changes can materially impact how we record and report our financial condition and results of operations. In June 2016, the FASB issued Accounting Standards Update (“ASU”) 2016-13, Measurement rr rr of Credit Losses on Financial Instruments. The amendments in this ASU introduce a new impairment model based on current expected credit losses (“CECL”) rather than incurred losses. The CECL model would apply to most debt instruments, including loan receivables and loan commitments. Unlike the incurred loss models in existing GAAP,PP the CECL model does not specify a threshold for the recognition of an impairment allowance. Rather, the Company would recognize an impairment allowance equal to its current estimate of expected credit losses for financial instruments as of the end of the reporting period. Measuring expected credit losses will most likely be a significant challenge for all entities, including the Company. In addition, to estimate expected credit losses, the Company could incur one-time and recurring costs, some of which may be related to system changes and data collection. Further, the impairment allowance measured under a CECL model could differ ff materially from the impairment allowance measured under the Company’s incurred loss model. To initially apply the proposed amendments, for most debt instruments, adjustment to its Consolidated Balance Sheets as of the beginning of the first the Company would record a cumulative-effect reporting period in which the guidance is effective (a modified retrospective approach).The amendments in ASU 2016-13 are ff effective required to be adopted through a modified retrospective approach, with a cumulative-effect of the beginning of the first reporting period in which the ASU is effective. for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and are adjustment to retained earnings as ff ff ff ff There can be no assurance as to the level of dividends we may pay on our common stock. Holders of our common stock are only entitled to receive such dividends as our Board of Directors may declare out of funds legally available for such payments. Although we have historically declared cash dividends on our common stock, we are not required to do so and there may be circumstances under which we would eliminate our common stock dividend in the future. This could adversely affect the market price of our common stock. ff We rely on dividends and other payments from our bank for substantially all of our revenue. We are a separate and distinct legal entity from the Bank, and we receive substantially all of our operating cash flows from dividends and other payments from the Bank. These dividends and payments are the principal source of funds to pay dividends on our capital stock and interest and principal on any debt we may have. Various federal and state laws and regulations limit the amount of dividends that the Bank may pay to us. Also, our right to participate in a distribution of assets upon a subsidiary’s liquidation or reorganization is subject to the prior claims of the subsidiary’s creditors. In the event the Bank is unable to pay dividends to us, we may not be able to service debt, pay obligations, or pay dividends on our common stock. The inability to receive dividends from the Bank could have a material adverse impact on our business, financial condition, results of operations and prospects. 20 Our ability to sustain or improve upon existing performance is dependent upon our ability to respond to technological change, and we may have fewer resources than some of our competitors to continue to invest in technological improvements. The financial services industry is undergoing rapid technological changes with frequent introductions of new technology- ff driven products and services. The effective and enables financial institutions to better use of technology increases efficiency serve customers and to reduce costs. Many of our competitors have substantially greater resources to invest in technological improvements than we do. Our future success will depend, in part, upon our ability to address the needs of our clients by using technology to provide products and services that will satisfy client demands for convenience, as well as to create additional efficiencies implement new technology-driven products and services or be ff successful in marketing these products and services to our customers. In addition, the implementation of technological changes and upgrades to maintain current systems and integrate new ones may also cause service interruptions, transaction processing errors and system conversion delays and may cause us to fail to comply with applicable laws. There can be no assurance that we will be able to successfully manage the risks associated with our increased dependency on technology. in our operations. We may not be able to effectively ff ff A failure in or breach of our operational or security systems, or those of our third party service providers, including as a result of cyber attacks, could disrupt our business, result in unintentional disclosure or misuse of confidential or proprietary information, damage our reputation, increase our costs and cause losses. As a financial institution, our operations rely heavily on the secure processing, storage and transmission of confidential and other information on our computer systems and networks. Any failure, interruption or breach in security or operational integrity of these systems could result in failures or disruptions in our online banking system, customer relationship management, general ledger, deposit and loan servicing and other systems. The security and integrity of our systems could be threatened by a variety of interruptions or information security breaches, including those caused by computer hacking, cyber attacks, electronic fraudulent activity or attempted theft of financial assets. We cannot assure you that any such failures, interruption or security breaches will not occur, or if they do occur, that they will be adequately addressed. While we have certain protective policies and procedures in place, the nature and sophistication of the threats continue to evolve. We may be required to expend significant additional resources in the future to modify and enhance our protective measures. Additionally,yy we face the risk of operational disruption, failure, termination or capacity constraints of any of the third parties that facilitate our business activities, including exchanges, clearing agents, clearing houses or other financial intermediaries. Such parties could also be the source of an attack on, or breach of, our operational systems. Any failures, interruptions or security breaches in our information systems could damage our reputation, result in a loss of customer business, result in a violation of privacy or other laws, or expose us to civil litigation, regulatory fines or losses not covered by insurance, all of which could have a material adverse impact on our business, financial condition, results of operations and prospects. Significant legal or regulatory actions could subject us to substantial uninsured liabilities and reputational harm and have a material adverse effect on our business and results of operations. We are from time to time subject to claims and proceedings related to our operations. These claims and legal actions, which could include supervisory or enforcement actions by our regulators, or criminal proceedings by prosecutorial authorities, could involve large monetary claims, including civil money penalties or fines imposed by government authorities and significant defense costs. To mitigate the cost of some of these claims, we maintain insurance coverage in amounts and with deductibles that we believe are appropriate for our operations. However, our insurance coverage does not cover any civil money penalties or fines imposed by government authorities and may not cover all other claims that might be brought against us or continue to be available to us at a reasonable cost. As a result, we may be exposed to substantial uninsured liabilities, which could adversely affect significant regulatory action against us could cause significant reputational harm to us and/or could have a material adverse impact on our business, financial condition, results of operations and prospects. our business, prospects, results of operations and financial condition. Substantial legal liability or ff 21 We are subject to a variety of operational risks, including reputational risk, legal risk and compliance risk, and the risk of fraud or theft by employees or outsiders, which may adversely affect our business and results of operations. We are exposed to many types of operational risks, including reputational risk, legal and compliance risk, the risk of fraud or theft by employees or outsiders, and unauthorized transactions by employees or operational errors, including clerical or record-keeping errors or those resulting from faulty or disabled computer or telecommunications systems. If personal, non-public, confidential or proprietary information of customers in our possession were to be mishandled or ff significant regulatory consequences, reputational damage and financial loss. Such mishandling or misused, we could suffer misuse could include, for example, if such information were erroneously provided to parties who are not permitted to have the information, either by fault of our systems, employees, or counterparties, or where such information is intercepted or otherwise inappropriately taken by third parties. Because the nature of the financial services business involves a high volume of transactions, certain errors may be repeated or compounded before they are discovered and successfully rectified. Our necessary dependence upon automated systems to record and process transactions and our large transaction volume may further increase the risk that technical flaws or employee tampering or manipulation of those systems will result in losses that are difficult to detect. We also may be subject to disruptions of our operating systems arising from events that are wholly or partially beyond our control (for example, computer viruses or electrical or telecommunications outages, natural disasters, disease pandemics or other damage to property or physical assets) which may give rise to disruption of service to customers and to financial loss or liability. We are further exposed to the risk that our external vendors may be unable to fulfill their contractual obligations (or will be subject to the same risk of fraud or operational errors by their respective employees as we are) and to the risk that we (or our vendors’) business continuity and data security systems prove to be inadequate. The occurrence of any of these risks could result in a diminished ability of us to operate our business (for example, by requiring us to expend significant resources to correct the defect), as well as potential liability to clients, reputational damage and regulatory intervention, which could have a material adverse impact on our business, financial condition, results of operations and prospects. ff Our business is subject to the risks of earthquakes, tsunamis, floods, fires and other natural catastrophic events. A major catastrophe, such as an earthquake, tsunami, flood, fire or other natural disaster could result in a prolonged interruption of our business. For example, our headquarters are located in Tacoma, Washington and we have operations throughout the Northwest, a geographical region that has been or may be affected The occurrence of any of these natural disasters could negatively impact our performance by disrupting our operations or the on our financial condition, results of operations and operations of our customers, which could have a material adverse effect cash flows. by earthquake, tsunami and flooding activity. ff ff We have various anti-takeover measures that could impede a takeover.rr ff ff Our articles of incorporation include certain provisions that could make it more difficult to acquire us by means of a , a proxy contest, merger or otherwise. These provisions include certain non-monetary factors that our board of tender offer directors may consider when evaluating a takeover offer the affirmative provisions may have the effect proxy contest or otherwise, and may deter any potentially hostile offers deprive our shareholders of opportunities to realize a premium for their Columbia common stock, even in circumstances where such action is favored by a majority of our shareholders. vote of no less than 66 2/3% of the total shares attributable to persons other than a “Control Person.” These of lengthening the time required for a person to acquire control of us through a tender offer , to obtain control of us. This could , and a requirement that any “Business Combination” be approved by or other efforts ff ff ff ff ff ff ITEM 1B. UNRESOLVEDLL STAFFTT COMMENTS None. 22 ITEM 2. PROPERTIES RR The Company’s principal properties include our corporate headquarters which is located at 13th & A Street, Tacoma, Washington, two operations facilities in Pierce County,yy Washington and one operations facility in Wilsonville, Oregon. The Company’s branch network as of December 31, 2017 is made up of 155 branches located throughout several Washington, Oregon and Idaho counties compared to 143 branches at December 31, 2016. The number of branches per state, as well as whether they are owned or operated under a lease agreement is detailed in the following table: Number of Branches Occupancy Type Owned Leased Washington branches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oregon branches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idaho branches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total Columbia Bank branches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 66 14 155 56 34 10 100 19 32 4 55 For additional information concerning our premises and equipment and lease obligations, see Notes 9 and 18, respectively,yy to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. ITEM 3. LEGAL PROCEEDINGS The Company and its subsidiaries are party to routine litigation arising in the ordinary course of business. Management believes that, based on information currently known to it, any liabilities arising from such litigation will not have a material adverse impact on the Company’s financial conditions, results of operations or cash flows. ITEM 4. MINE SAFETY DISCLOSURES Not applicable. 23 PART II ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY,YY RELATEDAA ISSUER PURCHASES OF EQUITY SECURITIES STOCKHOLDER MATTERS AA AND Quarterly Common Stock Prices and Dividends The Company’s common stock is traded on the NASDAQ Global Select Market under the symbol “COLB.” Quarterly high and low sales prices and dividend information for the last two years are presented in the following table. The prices shown do not include retail mark-ups, mark-downs or commissions: 2017 High Low Regular Special Total Cash Dividends Declared Cash Dividends Declared First quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Second quarter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Third quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fourth quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . For the year . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2016 First quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Second quarter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Third quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fourth quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . For the year . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ $ $ $ $ 5.68 41.49 42.92 48.06 8.06 High 2.15 31.81 33.28 45.27 5.27 $ $ $ $ $ $ $ $ $ $ 36.38 36.10 35.67 41.09 35.67 $ $ 0.22 0.22 0.22 0.22 0.88 $ $ — $ — — — — $ 0.22 0.22 0.22 0.22 0.88 Cash Dividends Declared Low Regular Special Total Cash Dividends Declared 26.56 26.17 26.21 31.75 26.17 $ $ 0.18 0.19 0.20 0.20 0.77 $ $ 0.20 0.18 0.19 0.19 0.76 $ $ 0.38 0.37 0.39 0.39 1.53 On December 31, 2017, the last sale price for our stock on the NASDAQ Global Select Market was $43.44. At January 31, 2018, the number of shareholders of record was 3,283. This figure does not represent the actual number of beneficial owners of common stock because shares are frequently held in “street name” by securities dealers and others for the benefit of individual owners who may vote the shares. At December 31, 2017, a total of 18,326 stock options were outstanding. Additional information about stock options and other equity compensation plans is included in Note 23 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. The payment of future cash dividends is at the discretion of our board of directors and subject to a number of factors, including results of operations, general business conditions, growth, financial condition and other factors deemed relevant to capital management strategies by the board of directors. In addition, the payment of cash dividends is subject to Federal regulatory requirements for capital levels and other restrictions. In this regard, current guidance from the Federal Reserve provides, among other things, that dividends per share on the Company’s common stock generally should not exceed earnings per share, measured over the previous four fiscal quarters. Subsequent to year end, on January 25, 2018, the Company declared a quarterly cash dividend of $0.22 per share, payable on February 21, 2018, to shareholders of record at the close of business on February 7, 2018. 24 Equity Compensation Plan Information The following table provides information as of December 31, 2017, regarding securities issued and to be issued under our equity compensation plans that were in effect ff during 2017: Equity compensation plans approved by security holders . . . . . . . . . . . . . . . . . . . . . . . . . Equity compensation plans not approved by security holders . . . . . . . . . . . . . . . . . . . . . . . . . __________ Year Ended December 31, 2017 Number of Shares to be Issued Upon Exercise of Outstanding Options and Rights (1) AA Weighted-Average Exercise Price of Outstanding Options and Rights Number of Shares Remaining Available for Future Issuance Under Equity Compensation Plans (2) 18,326 $ — 38.88 — 1,305,089 — (1) Includes shares to be issued upon exercise of options under the West Coast Bancorp (‘WestWW Coast”) plan, which was assumed as a result of the 2013 West Coast acquisition. (2) Includes 893,982 shares available for future issuance under the current stock option and equity compensation plan and 411,107 shares available for purchase under the Employee Stock Purchase Plan as of December 31, 2017. The following table provides information about repurchases of common stock by the Company during the quarter ended December 31, 2017: Total Number of Common Shares Purchased (1) 687 — 514 1,201 Average Price Paid per Common Share 42.07 $ Total Number of Shares Purchased as Part of Publicly Announced Plan (2) — — 47.03 44.19 $ — — — Maximum Number of Remaining Shares That May Be Purchased at Period End Under the Plan (2) 2,900,000 2,900,000 2,900,000 Period 10/1/2017 - 10/31/2017 . . . . . . . . 11/1/2017 - 11/30/2017 . . . . . . . . 12/1/2017 - 12/31/2017 . . . . . . . . __________ (1) Common shares repurchased by the Company during the quarter relate to shares withheld to pay taxes due upon vesting of restricted stock. (2) On September 27, 2017, the Board of Directors approved a stock repurchase program. The program authorizes the Company to repurchase up to 2.9 million shares of its outstanding common stock. 25 Five-YearYY Stock Performance Graph The following graph shows a five-year comparison of the total return to shareholders of Columbia’s common stock, the NASDAQ Composite Index (which is a broad nationally recognized index of stock performance by companies listed on the Nasdaq Stock Market) and the KBW Regional Banking Index (comprised of 50 banks and bank holding companies headquartered throughout the country,yy including Columbia). The definition of total return includes appreciation in market value of the stock as well as the actual cash and stock dividends paid to shareholders. The graph assumes that the value of the investment in Columbia’s common stock, the NASDAQ Composite and the KBW Regional Banking Index was $100 on December 31, 2012, and that all dividends were reinvested. Total Return Performance e u l aa a V x e d n I 350 300 250 200 150 100 50 12/31/12 12/31/13 12/31/14 12/31/15 12/31/16 12/31/17 Period Ending Columbia Banking System, Inc. NASDAQ Composite KBW Regional Banking Index Index Columbia Banking System, Inc.. . . . NASDAQ Composite. . . . . . . . . . . . KBW Regional Banking Index. . . . . 12/31/2012 100.00 100.00 100.00 12/31/2013 155.98 140.17 146.83 12/31/2014 162.49 160.95 150.39 12/31/2015 199.74 172.39 159.41 12/31/2016 288.77 187.85 221.77 12/31/2017 286.92 243.70 225.78 Period Ending Source: Bloomberg LP,PP New York City,yy NY 26 ITEM 6. SELECTED FINANCIAL DATAAA Five-YearYY Summary of Selected Consolidated Financial Data (1) For the Year Interest income. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Provision (recapture) for loan and lease losses . . . . . . . . . . . . Noninterest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Noninterest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net income applicable to common shareholders . . . . . . . . . . . Per Common Share Earnings (Basic). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Earnings (Diluted) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Book Value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Averages 2017 (2) 2016 2015 2014 (3) 2013 (4) (dollars in thousands except per share amounts) $ $ $ $ $ $ $ $ $ $ $ 374,746 6,757 367,989 8,631 109,642 291,017 112,828 112,828 1.86 1.86 26.70 $ $ $ $ $ $ $ $ $ $ $ 337,969 4,350 333,619 10,778 88,082 261,142 104,866 104,709 1.81 1.81 21.52 $ $ $ $ $ $ $ $ $ $ $ 328,891 4,004 324,887 8,591 91,473 266,149 98,827 98,690 1.71 1.71 21.48 $ $ $ $ $ $ $ $ $ $ $ 308,042 3,994 304,048 6,727 59,750 239,286 81,574 81,478 1.53 1.52 21.34 $ $ $ $ $ $ $ $ $ $ $ 296,935 5,840 291,095 (101) 26,700 230,886 60,016 59,984 1.24 1.21 20.50 Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 10,134,306 $ 9,311,621 $ 8,655,243 $ 7,468,091 $ 6,558,517 Interest-earning assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 9,098,276 $ 8,363,309 $ 7,685,734 $ 6,561,047 $ 5,754,543 Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 6,682,259 $ 6,052,389 $ 5,609,261 $ 4,782,369 $ 4,140,826 Securities, including Federal Home Loan Bank stock. . . . . . . $ 2,350,844 $ 2,269,121 $ 2,031,859 $ 1,708,575 $ 1,474,744 Deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 8,482,350 $ 7,774,309 $ 7,146,828 $ 6,187,342 $ 5,420,577 Shareholders’ equity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 1,410,056 $ 1,269,801 $ 1,246,952 $ 1,109,581 $ 979,099 Financial Ratios Net interest margin (tax equivalent) . . . . . . . . . . . . . . . . . . . . Return on average assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Return on average common equity . . . . . . . . . . . . . . . . . . . . . Average equity to average assets . . . . . . . . . . . . . . . . . . . . . . . At Year End 4.18% 1.11% 8.00% 13.91% 4.12% 1.13% 8.26% 13.64% 4.35% 1.14% 7.93% 14.41% 4.76% 1.09% 7.36% 14.86% 5.16% 0.92% 6.14% 14.93% Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 12,716,886 $ 9,509,607 $ 8,951,697 $ 8,578,846 $ 7,161,582 Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 8,358,657 $ 6,213,423 $ 5,815,027 $ 5,445,378 $ 4,517,296 Allowance for loan and lease losses . . . . . . . . . . . . . . . . . . . . $ 75,646 $ 70,043 $ 68,172 $ 69,569 $ 72,454 Securities, including Federal Home Loan Bank stock. . . . . . . $ 2,753,271 $ 2,288,817 $ 2,170,416 $ 2,131,622 $ 1,696,640 Deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 10,532,085 $ 8,059,415 $ 7,438,829 $ 6,924,722 $ 5,959,475 Core deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10,039,557 $ 7,749,568 $ 7,238,713 $ 6,753,142 $ 5,830,384 Shareholders’ equity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 1,949,922 $ 1,251,012 $ 1,242,128 $ 1,228,175 $ 1,053,249 Nonperforming Assets Nonaccrual loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other real estate owned and other personal property owned. . Total nonperforming assets . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ 66,189 13,298 79,487 $ $ 27,756 5,998 33,754 $ $ 21,464 13,738 35,202 $ $ 31,352 22,225 53,577 $ $ 34,015 36,037 70,052 Nonperforming loans to year end loans . . . . . . . . . . . . . . . . . . Nonperforming assets to year end assets . . . . . . . . . . . . . . . . . Allowance for loan and lease losses to year end loans . . . . . . % % 0.91% 0.45% 0.35% 1.13% 0.37% 0.39% 1.17% 0.58% 0.62% 1.28% 0.75% 0.98% 1.60% Net loan charge-offsff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 3,028 $ 8,907 $ 9,988 $ 9,612 $ 9,745 Other nonfinancial data Full-time equivalent employees. . . . . . . . . . . . . . . . . . . . . . . . Banking branches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,120 155 1,819 143 1,868 149 1,934 154 1,695 142 __________ (1) These unaudited schedules were derived from our audited financial statements and provide selected financial information concerning the Company that should be read in conjunction with “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this report. (2) During 2017, Columbia acquired Pacific Continental Corporation. See Note 2 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report for further information regarding this acquisition. (3) During 2014, Columbia acquired Intermountain Community Bancorp. (4) During 2013, Columbia acquired West Coast Bancorp. 27 Consolidated Five-YearYY Financial Data (1) Interest Income: Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taxable securities. . . . . . . . . . . . . . . . . . . . . . . Tax-exempt securities . . . . . . . . . . . . . . . . . . . Deposits in banks . . . . . . . . . . . . . . . . . . . . . . . Total interest income. . . . . . . . . . . . . . . . . Interest Expense: Deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Federal Home Loan Bank advances . . . . . . . . Prepayment charge on Federal Home Loan Bank advances . . . . . . . . . . . . . . . . . . . . . . . Subordinated debentures . . . . . . . . . . . . . . . . . Other borrowings . . . . . . . . . . . . . . . . . . . . . . . Total interest expense . . . . . . . . . . . . . . . . Net Interest Income . . . . . . . . . . . . . . . . . . . . Provision (recapture) for loan and lease losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net interest income after provision (recapture) for loan and lease losses . . . Noninterest income . . . . . . . . . . . . . . . . . . . . . Noninterest expense . . . . . . . . . . . . . . . . . . . . . Income before income taxes . . . . . . . . . . . . . . Provision for income taxes. . . . . . . . . . . . . . . . Net Income . . . . . . . . . . . . . . . . . . . . . . . . . . . Less: Dividends on preferred stock . . . . . Net Income Applicable to Common Shareholders . . . . . . . . . . . . . . . . . . . . . . . . Per Common Share Earnings basic. . . . . . . . . . . . . . . . . . . . . . Earnings diluted . . . . . . . . . . . . . . . . . . . . Average number of common shares outstanding (basic) . . . . . . . . . . . . . . . . . . . . Average number of common shares outstanding (diluted) . . . . . . . . . . . . . . . . . . Total assets at year end . . . . . . . . . . . . . . . . . . Years ended December 31, 2017 (2) 2016 2015 2014 (3) 2013 (4) (in thousands, except per share amounts) $ 324,229 38,659 11,045 813 $ 291,465 35,167 11,121 216 337,969 $ 286,166 30,774 11,842 109 328,891 $ 268,279 28,754 10,830 179 308,042 $ 266,284 20,459 9,837 355 296,935 4,800 1,078 — 575 6,757 367,989 3,134 671 — — 545 4,350 333,619 2,977 474 — — 553 4,004 324,887 3,005 396 — — 593 3,994 304,048 3,962 (404) 1,548 — 734 5,840 291,095 8,631 10,778 8,591 6,727 (101) 359,358 109,642 291,017 177,983 65,155 112,828 — 322,841 88,082 261,142 149,781 44,915 $ 104,866 157 112,828 $ 104,709 1.86 1.86 $ $ 1.81 1.81 316,296 91,473 266,149 141,620 42,793 98,827 137 98,690 1.71 1.71 $ $ $ $ 297,321 59,750 239,286 117,785 36,211 81,574 96 81,478 1.53 1.52 $ $ $ $ 291,196 26,700 230,886 87,010 26,994 60,016 32 59,984 1.24 1.21 $ $ $ $ $ $ $ $ 59,882 57,184 57,019 52,618 47,993 57,193 57,032 53,183 49,051 2,716,886 $ 9,509,607 $ 8,951,697 $ 8,578,846 $ 7,161,582 Cash dividends declared per common share . . $ 0.88 $ 1.53 $ 1.34 $ 0.94 $ 0.41 __________ (1) These unaudited schedules were derived from our audited financial statements and provide selected financial information concerning the Company that should be read in conjunction with “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this report. (2) During 2017, Columbia acquired Pacific Continental Corporation. See Note 2 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report for further information regarding this acquisition. (3) During 2014, Columbia acquired Intermountain Community Bancorp. (4) During 2013, Columbia acquired West Coast Bancorp. 28 ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS AA OPERATIONS LL OF FINANCIAL CONDITION AND RESULTSLL OF This discussion should be read in conjunction with our Consolidated Financial Statements and related notes in “Item 8. Financial Statements and Supplementary Data” of this report. In the following discussion, unless otherwise noted, references to increases or decreases in average balances in items of income and expense for a particular period and balances at a particular date refer to the comparison with corresponding amounts for the period or date for the previous year. Critical Accounting Policies We have established certain accounting policies in preparing our Consolidated Financial Statements that are in accordance with accounting principles generally accepted in the United States. Our significant accounting policies are presented in Note 1 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. Certain of these policies require the use of judgments, estimates and economic assumptions which may prove inaccurate or are subject to variation that may significantly affect presented or in future periods. Management believes that the judgments, estimates and economic assumptions used in the preparation of the Consolidated Financial Statements are appropriate given the factual circumstances at the time. We consider the following policies to be most critical in understanding the judgments that are involved in preparing our Consolidated Financial Statements. our reported results of operations and financial position for the periods ff Allowance for Loan and Lease Losses The allowance for loan and lease losses (the “allowance”) is an accounting estimate of incurred credit losses in our loan portfolio at the balance sheet date. The primary components of the allowance are 1) loans collectively evaluated for impairment in accordance with the Financial Accounting Standards Board Accounting Standards Codification Topic 450, Contingencies (ASC 450), 2) loans individually determined to be impaired in accordance with the FASB ASC Subtopic 310-10, Receivables: Overall (ASC 310-10) and 3) loans acquired with deteriorated credit quality in accordance with FASB ASC Subtopic 310-30, Receivables: Loans and Debt Securities Acquired with Deteriorated Credit Quality (ASC 310-30). The measure of estimated credit losses for the ASC 450 component is based upon the loss experience over a historical base period adjusted for a loss emergence period. The loss emergence period is an estimate of the period that it takes, on average, for us to identify the amount of loss incurred for a loan that has suffered a loss-causing event. Management then considers the effects portfolio: of the following qualitative factors to ensure our allowance reflects the inherent losses in the loan ff ff • Economic and business conditions; • Concentration of credit; • Lending management and staff;ff • Lending policies and procedures; • Loss and recovery trends; • Nature and volume of the portfolio; • Trends TT • Quality of internal loan review; and • External factors. in problem loans, loan delinquencies and nonaccrual loans; These qualitative factors have a high degree of subjectivity and changes in any of the factors could have a significant impact on our calculation of the allowance. The qualitative adjustment by loan segment is based upon management's assessment of inherent losses within a range between the weighted historical loss factor by segment and the maximum consecutive quarterly losses in the relevant loss emergence period by segment over the historical base period. The measure of estimated credit losses for the ASC 310-10 component begins if, based upon current information and events, we believe it is probable that we will be unable to collect all amounts due according to the contractual terms of the loan agreement or when a loan has been modified in a troubled debt restructuring. When a loan has been identified as impaired, the amount of impairment will be measured using discounted cash flows, except when it is determined that the remaining source of repayment for the loan is the operation or liquidation of the underlying collateral. In these cases, the current fair value of the collateral, reduced by costs to sell, will be used in place of discounted cash flows. As a final alternative, the observable market price of the debt may be used to assess impairment. Predominantly,yy the Company uses the fair value of collateral approach based upon a reliable valuation. 29 The measure of estimated credit losses for the ASC 310-30 component is based upon management’s estimate of future cash flows. Loans acquired with deteriorated credit quality that have common risk characteristics are aggregated into pools. The Company re-measures contractual and expected loan cash flows at the pool-level on a quarterly basis. If, due to credit deterioration, the present value of expected cash flows, as periodically re-measured, is less than the carrying value of the loan pool, the Company adjusts the carrying value of the loan pool to the lower amount by adjusting the allowance for loan losses with a charge to earnings through the provision for loan losses. If the present value of expected cash flows is greater than the carrying value of the loan pool, the Company adjusts the carrying value of the loan pool to a higher amount by recapturing previously recorded allowance for loan losses, if any. Our allowance policy and the judgments, estimates and economic assumptions involved are described in greater detail in the “Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit” section of this discussion and in Note 1 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. Business Combinations The Company applies the acquisition method of accounting for business combinations. Under the acquisition method, the acquiring entity in a business combination recognizes the assets acquired and liabilities assumed at their acquisition date fair values. Management utilizes prevailing valuation techniques appropriate for the asset or liability being measured in determining these fair values. Any excess of the purchase price over amounts allocated to assets acquired, including identifiable intangible assets, and liabilities assumed is recorded as goodwill. Where amounts allocated to assets acquired and liabilities assumed is greater than the purchase price, a bargain purchase gain is recognized. Acquisition-related costs are expensed as incurred. Valuation and Recoverability of Goodwill Goodwill represented $765.8 million of our $12.72 billion in total assets as of December 31, 2017. The Company has a single reporting unit. We review goodwill for impairment annually,yy during the third quarter, and also test for impairment between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of our reporting unit below its carrying amount. Such events and circumstances may include among others: a significant adverse change in legal factors or in the general business climate; significant decline in our stock price and market capitalization; unanticipated competition; the testing for recoverability of a significant asset group within the reporting unit; and an adverse action or assessment by a regulator. Any adverse change in these factors could have a significant impact on the recoverability of goodwill and could have a material impact on our Consolidated Financial Statements. Under the Intangibles – Goodwill and Other topic of the FASB ASC, the testing for impairment may begin with an assessment of qualitative factors to determine if it is more likely than not that the fair value of a reporting unit is less than its carrying amount. When required, the goodwill impairment test involves a two-step process. In step one, we would test goodwill for impairment by comparing the fair value of the reporting unit with its carrying amount. If the fair value of the reporting unit exceeds the carrying amount of the reporting unit, goodwill is not deemed to be impaired, and no further testing is necessary. If the carrying amount of the reporting unit were to exceed the fair value of the reporting unit, we would perform a second test to measure the amount of impairment loss, if any. To measure the amount of any impairment loss, we would determine the implied fair value of goodwill in the same manner as if the reporting unit were being acquired in a business combination. Specifically,yy we would allocate the fair value of the reporting unit to all of the assets and liabilities of the reporting unit in a hypothetical calculation that would determine the implied fair value of goodwill. If the implied fair value of goodwill is less than the recorded goodwill, we would record an impairment charge for the difference. ff The accounting estimates related to our goodwill require us to make considerable assumptions about fair values. Our assumptions regarding fair values require significant judgment about economic and industry factors and the growth and earnings prospects of the Bank. Changes in these judgments, either individually or collectively,yy may have a significant effect the estimated fair values. ff on Based on the results of the annual goodwill impairment test, we determined that no goodwill impairment charges were required as our single reporting unit’s fair value exceeded its carrying amount. As of December 31, 2017, we determined there were no events or circumstances which would more likely than not reduce the fair value of our reporting unit below its carrying amount. Please refer to Note 10 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report for further discussion. 30 2017 Financial Summary Income Statement • Consolidated net income for 2017 was $112.8 million, or $1.86 per diluted common share, compared with net income of $104.9 million, or $1.81 per diluted common share, in 2016. ◦ Net interest income for 2017 increased 10% to $368.0 million compared to $333.6 million for 2016. Interest income was $374.7 million in 2017, compared to $338.0 million in 2016. The increase was primarily due to higher average loan and securities volumes. Interest expense increased $2.4 million compared to 2016, due to higher rates on interest-bearing liabilities. ◦ Provision for loan and lease losses was $8.6 million in 2017, compared to $10.8 million in 2016. Provision expense for the current year was driven by net charge-offsff and growth in the loan portfolio from the Pacific Continental acquisition as well as organic growth. The decreased provision expense from the prior year was principally due to lower net charge-offsff in the current year. ◦ Noninterest income was $109.6 million for 2017, an increase from $88.1 million for 2016. The increase was primarily due to the $14.0 million gain on the sale of our merchant card services portfolio in 2017. ◦ Noninterest expense increased $29.9 million, or 11% to $291.0 million for 2017 due to higher acquisition- related expenses in the current year as well as higher ongoing expenses related to our acquisition of Pacific Continental. Balance Sheet • • assets at December 31, 2017 were $12.72 billion, up 34% from $9.51 billion at the end of 2016. The increase in TotalTT total assets as well as the increase in line items of our balance sheet were primarily driven by the acquisition of Pacific Continental in 2017. The Company is well-capitalized with a total risk-based capital ratio of 12.9796% at December 31, 2017. ◦ ◦ ◦ Investment securities available for sale at December 31, 2017 were $2.74 billion, up 20% from $2.28 billion at December 31, 2016. Loans were $8.36 billion, an increase of 35% from $6.21 billion at the end of 2016. The allowance for loan and lease losses increased to $75.6 million at December 31, 2017 compared to $70.0 million at December 31, 2016 due to the increase in size of the loan portfolio. The Company’s allowance was 0.91% of total loans, compared with 1.13% at the end of 2016. This ratio was impacted by our acquisition of Pacific Continental in 2017. ◦ Nonperforming assets totaled $79.5 million at December 31, 2017, up from $33.8 million at December 31, 2016. The increase in nonperforming assets was due to a $19.1 million increase attributable to the acquisition of Pacific Continental, with the remaining $14.7 million increase from non-acquired nonperforming assets. Nonperforming assets to year end assets increased to 0.63% at December 31, 2017 compared to 0.35% at December 31, 2016. ◦ Deposits totaled $10.53 billion at December 31, 2017 compared to $8.06 billion at December 31, 2016. ◦ Core deposits totaled $10.04 billion at December 31, 2017, compared to $7.75 billion at December 31, 2016. Core deposits represented 95% of total deposits at December 31, 2017, compared to 96% at December 31, 2016. ◦ ◦ Federal Home Loan Bank advances were $11.6 million at December 31, 2017, an increase of $5.1 million compared to December 31, 2016. Subordinated debentures of $35.6 million were assumed in the acquisition of Pacific Continental. 31 Business Combinations On November 1, 2017, the Company completed its acquisition of Pacific Continental. The Company acquired approximately $2.94 billion in assets, including $1.87 billion in loans measured at fair value and $2.12 billion in deposits. See Note 2 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report for further information regarding this acquisition. On November 1, 2014, the Company completed its acquisition of Intermountain. The Company acquired approximately $964.4 million in assets, including $502.6 million in loans measured at fair value and $736.8 million in deposits. On April 1, 2013, the Company completed its acquisition of West Coast. The Company acquired approximately $2.63 billion in assets, including $1.41 billion in loans measured at fair value and $1.88 billion in deposits. RESULTSLL OF OPERATIONS AA Summary A summary of the Company’s results of operations for each of the last three years ended December 31 follows: Year ended Increase (Decrease) Year ended Increase (Decrease) Year ended 2017 Amount % 2016 Amount % 2015 (dollars in thousands, except per share amounts) Interest income. . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 374,746 $ 36,777 Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net interest income . . . . . . . . . . . . . . . . . . . . . . . . . Provision for loan and lease losses . . . . . . . . . . . . . Noninterest income . . . . . . . . . . . . . . . . . . . . . . . . . Noninterest expense: Compensation and employee benefits . . . . . . . . . Other expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Income before income taxes . . . . . . . . . . . . . . . . . . 6,757 367,989 8,631 109,642 169,674 121,343 291,017 Provision for income taxes. . . . . . . . . . . . . . . . . . . . 65,155 2,407 34,370 (2,147) 21,560 19,392 10,483 29,875 28,202 20,240 Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 112,828 $ 7,962 Less: earnings allocated to participating securities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Earnings allocated to common shareholders . . . Earnings per common share, diluted . . . . . . . . . . . . 1,504 111,324 1.86 (52) 8,014 0.05 $ $ $ $ 11 55 10 (20) 24 13 9 11 19 45 8 (3) 8 3 $ 337,969 $ 9,078 4,350 333,619 10,778 88,082 150,282 110,860 261,142 149,781 44,915 104,866 1,556 103,310 1.81 346 8,732 2,187 (3,391) 872 (5,879) (5,007) 8,161 2,122 6,039 306 5,733 0.10 $ $ $ $ $ $ 3 9 3 25 (4) 1 (5) (2) 6 5 6 24 6 6 $ 328,891 4,004 324,887 8,591 91,473 149,410 116,739 266,149 141,620 42,793 98,827 1,250 97,577 1.71 $ $ $ Net Interest Income Net interest income is the difference between interest income and interest expense. Net interest income on a fully taxable- equivalent basis expressed as a percentage of average total interest-earning assets is referred to as the net interest margin, which represents the average net effective yield on interest-earning assets. ff ff 32 The following table sets forth the average balances of all major categories of interest-earning assets and interest-bearing liabilities, the total dollar amounts of interest income on interest-earning assets and interest expense on interest-bearing liabilities, the average yield earned on interest-earning assets and average cost of interest-bearing liabilities by category and in total, net interest income, net interest spread, net interest margin and the ratio of average interest-earning assets to interest- earning liabilities: Net Interest Income Summary 2017 Interest Earned/ Paid Average Balances Average Rate Average Balances 2016 Interest Earned/ Paid Average Rate Average Balances 2015 Interest Earned/ Paid Average Rate (dollars in thousands) ASSETS Loans, net (1)(2)(3) . . . . . . . . . . . . . . . . $ 6,682,259 $330,400 4.94% $ 6,052,389 $296,283 4.90% $ 5,609,261 $289,450 Taxable securities (4) . . . . . . . . . . . . . . . 1,886,128 Tax exempt securities (3) . . . . . . . . . . . . Interest-earning deposits with banks . . . 464,716 65,173 38,659 16,992 813 2.05% 1,804,004 3.66% 1.25% 465,117 41,799 35,167 17,109 216 1.95% 1,577,711 3.68% 0.52% 454,148 44,614 30,774 18,219 109 Total interest-earning assets . . . . . 9,098,276 386,864 4.25% 8,363,309 348,775 4.17% 7,685,734 338,552 Other earning assets . . . . . . . . . . . . . . . . Noninterest-earning assets . . . . . . . . . . . 181,792 854,238 Total assets . . . . . . . . . . . . . . . . . . 10,134,306 LIABILITIES AND SHAREHOLDERS’ EQUITY Certificates of deposit . . . . . . . . . . . . . . Savings accounts . . . . . . . . . . . . . . . . . . Interest-bearing demand. . . . . . . . . . . . . Money market accounts . . . . . . . . . . . . . Total interest-bearing deposits . . . Federal Home Loan Bank advances . . . . . . . . . . . . . . . . . . . . . . Subordinated debentures . . . . . . . . . . . . Other borrowings and interest- bearing liabilities . . . . . . . . . . . . . . . . Total interest-bearing liabilities . . Noninterest-bearing deposits . . . . . . . . . Other noninterest-bearing liabilities . . . Shareholders’ equity. . . . . . . . . . . . . . . . Total liabilities & shareholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . $ 406,406 $ 1,031,719 2,158,656 4,371,121 79,788 5,905 55,913 4,512,727 4,111,229 100,294 1,410,056 $ 10,134,306 656 96 950 3,098 4,800 1,078 304 575 6,757 156,871 791,441 $ 9,311,621 149,476 820,033 $ 8,655,243 522 71 695 1,846 3,134 671 — 545 4,350 0.16% $ 426,296 $ 0.01% 0.09% 698,687 952,135 0.14% 1,993,283 0.11% 4,070,401 1.35% 5.15% 79,673 — 1.03% 77,022 0.15% 4,227,096 3,703,908 110,816 1,269,801 $ 9,311,621 868 70 612 1,427 2,977 474 — 553 4,004 0.12% $ 483,193 $ 0.01% 0.07% 637,464 982,491 0.09% 1,834,733 0.08% 3,937,881 0.84% —% 70,678 — 0.71% 88,924 0.10% 4,097,483 3,208,947 101,861 1,246,952 $ 8,655,243 5.16% 1.95% 4.01% 0.26% 4.40% 0.18% 0.01% 0.06% 0.08% 0.08% 0.67% —% 0.62% 0.10% Net interest income (tax equivalent) . . . . . . . . . . . . . . . . $380,107 $344,425 $334,548 Net interest spread (tax equivalent). . . . . . . . . . . . . . . . . . . . . . . . . . . Net interest margin (tax equivalent) . . . . . . . . . . . . . . . . . . . . . . . . . . 4.10% 4.18% Average interest-earning assets to average interest-bearing liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201.61% 4.07% 4.12% 197.85% 4.30% 4.35% 187.57% __________ (1) Nonaccrual loans have been included in the table as loans carrying a zero yield. Amortized net deferred loan fees and unearned net discounts on acquired loans were included in the interest income calculations. The amortization of net deferred loan fees was $7.1 million in 2017, $5.3 million in 2016 and $4.9 million in 2015. The accretion of net unearned discounts on certain acquired loans was $8.7 million in 2017, $12.0 million in 2016, and $18.1 million in 2015. Incremental accretion on purchased credit impaired loans is also included in loan interest earned. The incremental accretion income on purchased credit impaired loans was $4.1 million in 2017, $6.0 million in 2016 and $9.1 million in 2015. (2) (3) Yields on fully taxable equivalent basis. The tax equivalent yield adjustment to interest earned on loans was $6.2 million, $4.8 million and $3.3 million for the years ended December 31, 2017, 2016, and 2015, respectively. The tax equivalent yield adjustment to interest earned on tax exempt securities was $5.9 million, $6.0 million and $6.4 million for the years ended December 31, 2017, 2016, and 2015, respectively. (4) During the twelve months ended December 31, 2017, the Company recorded a $1.8 million adjustment to premium amortization, which decreased interest income on taxable securities. 33 Net interest income is impacted by the volume (changes in volume multiplied by prior rate), interest rate (changes in rate multiplied by prior volume) and the mix of interest-earning assets and interest-bearing liabilities. The following table shows changes in net interest income on a fully taxable-equivalent basis between 2017 and 2016, as well as between 2016 and 2015 broken down between volume and rate. Changes attributable to the combined effect allocated proportionately to the changes due to volume and the changes due to interest rates: of volume and interest rates have been ff Changes in Net Interest Income 2017 Compared to 2016 Increase (Decrease) Due to 2016 Compared to 2015 Increase (Decrease) Due to Volume Rate Total Volume Rate Total (in thousands) Interest Income Loans, net . . . . . . . . . . . . . . . . . . . . . . . . . . . Taxable securities . . . . . . . . . . . . . . . . . . . . . Tax-exempt securities. . . . . . . . . . . . . . . . . . Interest earning deposits with banks . . . . . . Interest income. . . . . . . . . . . . . . . . Interest Expense Deposits: Certificates of deposit . . . . . . . . . . . . . . Savings accounts . . . . . . . . . . . . . . . . . . Interest-bearing demand . . . . . . . . . . . . Money market accounts . . . . . . . . . . . . Total interest on deposits . . . . . . . . Federal Home Loan Bank advances. . . . . . . Subordinated debentures . . . . . . . . . . . . . . . Other borrowings and interest-bearing liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . Interest expense . . . . . . . . . . . . . . . $ 31,116 1,640 $ 3,001 $ 34,117 3,492 $ 22,155 4,411 $ (15,322) (18) (117) 432 (1,542) $ 6,833 4,393 (1,110) 597 $ 38,089 (7) $ 26,991 114 $ (16,768) 107 $ 10,223 1,852 (102) 428 5,179 169 $ 32,910 $ $ (25) $ 159 $ 62 164 209 1 304 (45) 469 $ $ 32,441 $ $ 7 193 1,088 1,457 406 — 75 1,938 3,241 134 25 255 1,252 1,666 407 304 30 $ (93) $ (253) $ (346) 6 (19) 131 25 65 — (5) 102 288 132 132 — 1 83 419 157 197 — 267 (275) (8) 2,407 $ $ 35,682 357 $ $ 26,634 (11) $ $ (16,757) $ $ 346 9,877 Incremental accretion income represents the amount of interest income recorded on acquired loans above the contractual rate stated in the individual loan notes. The additional interest income stems from the net discount established at the time these loan portfolios were acquired. The following table shows the impact to interest income of incremental accretion income as well as the net interest margin and operating net interest margin for the periods presented: Year Ended December 31, 2017 Year Ended December 31, 2016 Year Ended December 31, 2015 (in thousands) Incremental accretion income due to: FDIC purchased credit impaired loans. . . . . . . . . . . . . . . . . . . . Other FDIC acquired loans (2). . . . . . . . . . . . . . . . . . . . . . . . . . Other acquired loans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total incremental accretion income . . . . . . . . . . . . . . . . . . . . . . . . $ $ Net interest margin (tax equivalent) . . . . . . . . . . . . . . . . . . . . . . . . Operating net interest margin (tax equivalent) (1) . . . . . . . . . . . . . $ $ 4,107 — 8,689 12,796 4.18% 4.15% $ $ 5,972 — 11,983 17,955 4.12% 4.01% 9,096 234 17,862 27,192 4.35% 4.15% __________ (1) Operating net interest margin (tax equivalent) is a Non-GAAP financial measure. See Non-GAAP financial measures section of “Item 7. Management’s Discussion and Analysis of Financial Conditions and Results of Operations.” (2) For 2017 and 2016, incremental accretion income on other FDIC acquired loans was no longer considered significant. 34 Comparison of 2017 with 2016 Taxable-equivalent net interest income totaled $380.1 million in 2017, compared with $344.4 million for 2016. The increase in net interest income during 2017 resulted from the increase in the size of the loan and securities portfolios, primarily due to the Pacific Continental acquisition, partially offset by lower incremental accretion income from acquired loans. ff The Company’s net interest margin (tax equivalent) increased from 4.12% for the year ended December 31, 2016 to by decreased 4.18% for the current year due primarily to higher yields on loans as well as higher loan volumes, partially offset impact of accretion income on the loan portfolio. The Company’s operating net interest margin (tax equivalent) increased from 4.01% for the year ended December 31, 2016 to 4.15% for the current year due to higher volumes and rates on loans. ff For a discussion of the methodologies used by management in recording interest income on loans, please see Note 1 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. Comparison of 2016 with 2015 Taxable-equivalent net interest income totaled $344.4 million in 2016, compared with $334.5 million for 2015. The increase in net interest income during 2016 resulted from the increase in the size of the loan and securities portfolios. These increases were partially offset and renewals and purchased securities. by lower incremental accretion from acquired loans as well as lower yields on loan originations ff The Company’s net interest margin (tax equivalent) decreased from 4.35% for the year ended December 31, 2015 to 4.12% for the year ended December 31, 2016 primarily due to the decreased impact of accretion income on the loan portfolio as well as lower yields on loans and securities. The Company’s operating net interest margin (tax equivalent) decreased from 4.15% in 2015 to 4.01% for 2016. The decrease was due to the combination of lower rates on loans as well as securities from 2015. Provision for Loan and Lease Losses The Company accounts for the credit risk associated with lending activities through its “Allowance for loan and lease losses” and “Provision for loan and lease losses”. The provision is the expense recognized in the Consolidated Statements of Income to adjust the allowance to the levels deemed appropriate by management, as determined through its application of the Company’s allowance methodology procedures. For discussion of the methodology used by management in determining the adequacy of the ALLL see the “Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit” and “Critical Accounting Policies” sections of this discussion. The Company recorded provision expense of $8.6 million, $10.8 million and $8.6 million in 2017, 2016 and 2015. respectively. The provision recorded in 2017 reflected management’s ongoing assessment of the credit quality of the the provision include net charge-offs, Company’s loan portfolio. Factors affecting composition of the loan portfolio and changes in the economic environment during the period. See “Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit” section of this discussion for further information on factors considered by the Company in assessing the credit quality of the loan portfolio and establishing the allowance for loan and lease losses. credit quality migration, and size and ff ff For the years ended December 31, 2017, 2016 and 2015, net loan charge-offsff amounted to $3.0 million, $8.9 million, and $10.0 million, respectively. 35 Noninterest Income The following table presents the significant components of noninterest income and the related dollar and percentage change from period to period: 2017 $ Change % Change 2016 $ Change % Change 2015 Years ended December 31, (dollars in thousands) Deposit account and treasury management fees . . . . . . . . . . . . . . Card revenue . . . . . . . . . . . . . . . . . . . Financial services and trust revenue . . . . . . . . . . . . . . . . . . . . . . Loan revenue . . . . . . . . . . . . . . . . . . . Merchant processing revenue. . . . . . . Bank owned life insurance (BOLI) . . Investment securities gains (losses), net . . . . . . . . . . . . . . . . . . . Change in FDIC loss-sharing asset . . Gain on sale of merchant card services portfolio . . . . . . . . . . . . . . Other. . . . . . . . . . . . . . . . . . . . . . . . . . Total noninterest income . . . . . . . . . . Comparison fof 2017 hwith 2016 6 $ 30,381 $ 1,881 7 % $ 28,500 $ 8 % 23,620 25,627 11,478 12,399 4,283 5,380 2,007 212 1,432 (4,449) 834 2 % 13 % (51)% 18 % (11) (447) (1,192) (101)% 2,138 (83)% 14,000 6,552 14,000 4,697 100 % 253 % 11,266 10,967 8,732 4,546 1,181 (2,585) — 1,855 49 930 — % $ 28,451 4 % 22,690 (1,330) (11)% 35 (243) 105 (400) 1,425 — (3,962) — % (3)% 2 % (25)% (36)% — % (68)% 12,596 10,932 8,975 4,441 1,581 (4,010) — 5,817 $ 109,642 $ 21,560 24 % $ 88,082 $ (3,391) (4)% $ 91,473 The $21.6 million increase in noninterest income was principally from the $14.0 million gain on sale of the merchant card services portfolio on July 1, 2017. With that sale, we transitioned the delivery of those services from in-house to an outsourced model to better serve our business clients via a broader selection of competitive, best-in-class payment processing solutions. Subsequent to the sale, we ceased recording revenue in “Merchant processing revenue” and began recording our share of net merchant services revenue in “Card revenue.” For the current year, that revenue share was $1.1 million. Also contributing to the increase was higher other noninterest income, principally from a current year BOLI benefit of $4.2 million, compared to a BOLI benefit of $254 thousand in the comparison period. Finally,yy as a result of our termination of loss-sharing in the current year, the change in FDIC loss-sharing asset improved from a charge of $2.6 million in the comparison period to a charge of $447 thousand in the current year. However, we also recognized in noninterest expense a $2.4 million charge related to loss-sharing termination. For additional information on the FDIC loss-sharing asset, please see the “FDIC Loss-sharing Asset” section of “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” and Note 8 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. Comparison of 2016 with 2015 Noninterest income for the year ended December 31, 2016 was $88.1 million, a decrease of $3.4 million from 2015. The decrease from 2015 was due to a $3.1 million adjustment recorded in 2015 to other noninterest income related to the mortgage repurchase liability established with our acquisition of West Coast as well as a decrease of $1.3 million in financial services and trust revenue. The decrease in financial services revenue was driven by reduced investment activity in 2016. Investment activity was negatively impacted by employee turnover and efforts to providing investment advice. Partially offsetting of debit card interchange and ATM fees. In addition to these net decreases, there was a decrease in the charge relating to the change in FDIC loss-sharing asset from a charge of $4.0 million in 2015 to $2.6 million in 2016. expended to comply with certain new fiduciary rules related these decreases was an increase in card revenue, which consists principally ff ff 36 Noninterest Expense The following table presents the significant components of noninterest expense and the related dollar and percentage change from period to period: Compensation and employee benefits . . . All other noninterest expense: Occupancy. . . . . . . . . . . . . . . . . . . . . . . Merchant processing expense . . . . . . . . Advertising and promotion . . . . . . . . . . Data processing . . . . . . . . . . . . . . . . . . . Legal and professional services . . . . . . Taxes, license and fees . . . . . . . . . . . . . Regulatory premiums . . . . . . . . . . . . . . Net cost (benefit) of operation of other real estate owned . . . . . . . . . . . Amortization of intangibles . . . . . . . . . Other . . . . . . . . . . . . . . . . . . . . . . . . . . . Total all other noninterest 2017 $ Change % Change 2016 $ Change % Change 2015 Years ended December 31, (dollars in thousands) $ 169,674 $ 19,392 13 % $ 150,282 $ 872 1 % $ 149,410 32,407 2,196 4,466 18,205 15,151 4,773 3,183 468 6,333 34,161 (1,327) (2,134) (132) 1,717 7,262 (412) (594) (83) 387 5,799 (4)% (49)% (3)% 10 % 92 % (8)% (16)% (15)% 7 % 20 % 33,734 4,330 4,598 16,488 7,889 5,185 3,777 551 5,946 28,362 (1,084) 126 (115) (933) (1,719) (210) (1,029) (3)% 3 % (2)% (5)% (18)% (4)% (21)% 2,180 (936) (2,159) (134)% (14)% (7)% 34,818 4,204 4,713 17,421 9,608 5,395 4,806 (1,629) 6,882 30,521 expense . . . . . . . . . . . . . . . . . . . . Total noninterest expense . . . 121,343 , $ 291,017 $ 10,483 , 29,875 110,860 9 % , 11 % $ 261,142 (5,879) ) $ (5,007) ( , 116,739 (5)% , (2)% $ 266,149 The following table shows the impact of the acquisition-related expenses for the periods indicated to the various components of noninterest expense: Acquisition-related expenses: Compensation and employee benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Occupancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Advertising and promotion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Data processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Legal and professional fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taxes, licenses and fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total impact of acquisition-related costs to noninterest expense . . . . . . . . . . . . . Acquisition-related expenses by transaction: West Coast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intermountain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pacific Continental (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total impact of acquisition-related costs to noninterest expense . . . . . . . . . . . . . $ $ $ $ 2017 Years ended December 31, 2016 (in thousands) 2015 8,014 1,912 467 1,555 4,618 10 620 , 17,196 $ $ 35 2,383 — 18 291 — — 2,727 , $ $ — $ — 17,196 , 17,196 $ — $ 2,436 291 , 2,727 $ 3,893 2,357 448 2,005 1,254 — 960 , 10,917 72 10,845 — , 10,917 __________ (1) The Company completed the acquisition of Pacific Continental on November 1, 2017. See Note 2 of the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report for further information regarding this acquisition. 37 Comparison of 2017 with 2016 ff of acquisition-related expenses, noninterest expense increased $15.4 million due to higher compensation Noninterest expense was $291.0 million in 2017, an increase of $29.9 million, or 11%, over 2016. This increase was driven by higher acquisition-related expenses in the current year of $17.2 million compared to $2.7 million in 2016. After removing the effect and employee benefits stemming from additional personnel costs associated with the Pacific Continental acquisition. Also contributing to the increase was a $2.4 million charge related to termination of FDIC loss-sharing agreements which was recognized in other noninterest expense. Finally,yy legal and professional fees were higher due to costs from our investment in a customer relationship management application and the search to fill certain executive level positions. These increases were partially offset portfolio, we no longer directly incur merchant processing costs. by a decrease in merchant processing expense. As a result of the 2017 sale of our merchant card services ff Comparison of 2016 with 2015 Noninterest expense in 2016 decreased $5.0 million, or 2%, over 2015. This decrease was driven by lower acquisition- of acquisition-related related expenses in 2016 of $2.7 million compared to $10.9 million in 2015. After removing the effect expenses, noninterest expense increased $3.2 million primarily due to higher cost of operation of OREO, which was a net cost of $551 thousand in 2016 compared to a net benefit of $1.6 million in 2015. ff Income Tax For the years ended December 31, 2017, 2016 and 2015 we recorded income tax provisions of $65.2 million, $44.9 ff million and $42.8 million, respectively. The effective tax rate was 37% in 2017, 30% in 2016 and 30% in 2015. Our effective tax for 2017 was impacted by the re-measurement of our deferred tax assets pursuant to the newly enacted Tax Cuts and Jobs Act. Beginning in 2018, the Tax Cuts and Jobs Act reduces the federal tax rate for corporations from 35% to 21% and changes or limits certain deductions. As a result of the lower corporate tax rate, during the current year, we recorded a re-measurement charge of $12.2 million to reduce our deferred tax assets. For 2016 and 2015, our effective tax rate was less than the 35% federal statutory rate primarily due to tax-exempt municipal investment securities income, tax-exempt earnings from bank owned life insurance, and income from loans with favorable tax attributes. For additional information, see Note 24 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. ff ff Financial Condition Our total assets increased 34% to $12.72 billion at December 31, 2017 from $9.51 billion at December 31, 2016. The acquisition of Pacific Continental during 2017 was the primary driver for the increase to total assets along with increases to other line items on our balance sheet. See Note 2 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report for further information regarding this acquisition. Cash and cash equivalents increased $118.3 million. Our available for sale securities portfolio increased $464.3 million. The loan portfolio increased $2.14 billion, or 35%, to $8.28 billion. Premises and equipment, net also increased $19.1 million or 13%. Deposit balances increased $2.47 billion, or 31%, to $10.53 billion. Federal Home Loan Bank advances increased $5.1 million to $11.6 million. Total shareholders’ equity increased $698.9 million to $1.95 billion. Investment Portfolio We invest in securities to generate revenue for the Company,yy to manage liquidity while minimizing interest rate risk and to provide collateral for certain public deposits and short-term borrowings. The amortized cost amounts represent the Company’s original cost for the investments, adjusted for accumulated amortization or accretion of any yield adjustments related to the security. The estimated fair values are the amounts we believe the securities could be sold for as of the dates indicated. At December 31, 2017 gross unrealized losses in our securities portfolio were $34.3 million related to 757 separate available for sale securities. Based on past experience with these types of securities and our own financial performance, we do not currently intend to sell any securities in a loss position nor does available evidence suggest it is more likely than not that management will be required to sell any securities currently in a loss position before the recovery of the amortized cost basis. We review these investments for other-than-temporary impairment on an ongoing basis. Our investment portfolio increased $464.3 million from the prior year due to securities acquired through the acquisition by maturities, repayments of Pacific Continental of $449.3 million and securities purchases of $355.6 million, partially offset and sales of $314.3 million, $21.0 million in premium amortization and a $5.3 million increase in net unrealized loss of the investment portfolio. ff 38 At December 31, 2017, U.S. government agency and government-sponsored enterprise mortgage-backed securities (“MBS”) and collateralized mortgage obligations (“CMO”) comprised 63% of our investment portfolio, state and municipal securities were 22%, and government agency and government-sponsored enterprise securities were 15%. Our entire investment portfolio is categorized as available for sale and carried on our balance sheet at fair value. The average duration of our investment portfolio was approximately 3 years and 10 months at December 31, 2017. This duration takes into account calls, where appropriate, and consensus prepayment speeds. The following table presents the contractual maturities and weighted average yield of our investment portfolio: December 31, 2017 Amortized Cost Fair Value Yield (dollars in thousands) U.S. government agency and government-sponsored enterprise mortgage-backed securities & collateralized mortgage obligations (1) Due through 1 year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Over 1 through 5 years. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Over 5 through 10 years. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Over 10 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . State and municipal securities (2) Due through 1 year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Over 1 through 5 years. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Over 5 through 10 years. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Over 10 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . U.S. government agency and government-sponsored enterprise securities (1) Due through 1 year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Over 1 through 5 years. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Over 5 through 10 years. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . U.S. government securities (1) Over 1 through 5 years. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 23 197,308 501,257 1,053,648 $ 1,752,236 $ 23 195,704 492,467 1,038,531 $ 1,726,725 $ $ $ $ $ $ 23,334 204,506 224,696 141,404 593,940 101,528 236,856 78,510 416,894 251 251 $ $ $ $ $ $ 23,511 205,921 225,587 140,985 596,004 101,229 234,987 78,558 414,774 248 248 2.40% 2.47% 3.16% 2.63% 2.76% 4.54% 3.38% 3.30% 3.79% 3.49% 1.04% 1.82% 2.32% 1.73% 1.39% 1.39% __________ (1) The maturities reported for mortgage-backed securities, collateralized mortgage obligations, government agency,yy government-sponsored enterprise, and government securities are based on contractual maturities and principal amortization. (2) Yields on fully taxable equivalent basis. For further information on our investment portfolio, see Note 4 of the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. Federal Home Loan Bank Stock Federal Home Loan Bank of Des Moines (the “FHLB Des Moines”) stock is composed of two sub-classes: membership stock and activity based stock. Membership stock is stock we are required to purchase and hold as a condition of membership in the FHLB. The Company’s membership stock purchase requirement is measured as a percentage of our year-end assets, subject to a $10 million cap. Activity based stock is stock we are required to purchase and hold in order to obtain an advance or participate in FHLB mortgage programs. The Company’s activity based stock purchase requirement is measured as a percentage of our advance proceeds. At December 31, 2017 the Company held $10.4 million of FHLB Des Moines Class B stock, $10.0 million of which was membership stock and the remaining $440 thousand was activity based. The FHLB stock is issued, transferred, redeemed, and repurchased at a par value of $100. 39 Commercial business . . . . . . . . . Real estate: One-to-four family residential . . . Commercial and multifamily residential . . . . . . . . . . . . . . . . Total real estate . . . . . . . . . . . . . . Real estate construction: One-to-four family residential . . . Commercial and multifamily residential . . . . . . . . . . . . . . . . Total real estate construction . . . . Consumer . . . . . . . . . . . . . . . . . . Loan Portfolio on The Bank is a full service commercial bank, which originates a wide variety of loans, and focuses its lending efforts originating commercial business and commercial real estate loans. The following table sets forth our loan portfolio by type of loan for the dates indicated: ff 2017 % of Total 2016 % of Total 2015 % of Total 2014 % of Total 2013 % of Total (dollars in thousands) $ 3,377,324 40.4 % $ 2,551,054 41.1 % $ 2,362,575 40.6 % $ 2,119,565 38.9 % $ 1,561,782 34.6 % December 31, 188,396 2.3 % 170,331 2.7 % 176,295 3.0 % 175,571 3.2 % 108,317 2.4 % 3,825,739 45.8 % 2,719,830 43.7 % 2,491,736 42.9 % 2,363,541 43.5 % 2,080,075 4,014,135 48.1 % 2,890,161 46.4 % 2,668,031 45.9 % 2,539,112 46.7 % 2,188,392 46.0 % 48.4 % 200,518 2.4 % 121,887 2.0 % 135,874 2.3 % 116,866 2.1 % 54,155 1.2 % Purchased credit impaired . . . . 112,670 371,931 572,449 4.4 % 6.8 % 4.0 % 1.3 % 209,118 331,005 329,261 145,660 3.4 % 5.4 % 5.3 % 2.3 % 167,413 303,287 342,601 180,906 2.9 % 5.2 % 5.9 % 3.1 % 134,443 251,309 364,182 230,584 2.5 % 4.6 % 6.7 % 4.2 % 126,390 180,545 357,014 297,845 2.8 % 4.0 % 7.9 % 6.6 % Subtotal . . . . . . . . . . . . . . . . . . . . Less: Net unearned income . . . . . Loans, net of unearned income (before Allowance for Loan and Lease Losses) . . . . . . . . . . 8,410,768 100.6 % 6,247,141 100.5 % 5,857,400 100.7 % 5,504,752 101.1 % 4,585,578 101.5 % (52,111) (0.6)% (33,718) (0.5)% (42,373) (0.7)% (59,374) (1.1)% (68,282) (1.5)% $ 8,358,657 100.0 % $ 6,213,423 100.0 % $ 5,815,027 100.0 % $ 5,445,378 100.0 % $ 4,517,296 100.0 % Loans held for sale . . . . . . . . . . . . $ 5,766 $ 5,846 $ 4,509 $ 1,116 $ 735 At December 31, 2017, total loans, gross of the ALLL were $8.36 billion compared with $6.21 billion in the prior year, an increase of $2.15 billion, or 35% from the previous year. The increase in the loan portfolio was primarily due to the addition of $1.87 billion in loans from the Pacific Continental acquisition, as well as organic loan production, partially offset contractual payments and prepayments. Total loans, net of the ALLL represented 65% of total assets at both December 31, 2017 and 2016. by ff Commercial Business Loans: We are committed to providing competitive commercial lending in our primary market areas. Management expects a continued focus within its commercial lending products and to emphasize, in particular, relationship banking with businesses and business owners. Real Estate Loans: One-to-four family residential loans are secured by properties located within our primary market areas and, typically,yy have loan-to-value ratios of 80% or lower at origination. Our underwriting standards for commercial and multifamily residential loans generally require that the loan-to-value ratio for these loans not exceed 75% of appraised value, cost, or discounted cash flow value, as appropriate, and that commercial properties maintain debt coverage ratios (net operating income divided by annual debt servicing) of 1.2 or better. However, underwriting standards can be influenced by competition and other factors. We endeavor to maintain the highest practical underwriting standards while balancing the need to remain competitive in our lending practices. Real Estate Construction Loans: We originate a variety of real estate construction loans. Underwriting guidelines for these loans vary by loan type but include loan-to-value limits, term limits and loan advance limits, as applicable. Our underwriting guidelines for commercial and multifamily residential real estate construction loans generally require that the loan-to-value ratio not exceed 75% and stabilized debt coverage ratios (net operating income divided by annual debt servicing) of 1.2 or better. As noted above, underwriting standards can be influenced by competition and other factors. However, we endeavor to maintain the highest practical underwriting standards while balancing the need to remain competitive in our lending practices. Consumer Loans: Consumer loans include automobile loans, boat and recreational vehicle financing, home equity and home improvement loans and miscellaneous personal loans. 40 Foreign Loans: The Company has no material foreign activities. Substantially all of the Company’s loans and unfunded commitments are geographically concentrated in its service areas within the states of Washington, Oregon and Idaho. Purchased Credit Impaired Loans: PCI loans are comprised of loans and loan commitments acquired in connection with the 2011 FDIC-assisted acquisitions of First Heritage Bank and Summit Bank, as well as the 2010 FDIC-assisted acquisitions of Columbia River Bank and American Marine Bank. PCI loans are generally accounted for under ASC Topic 310-30, Loans and Debt Securities Acquiredrr with Deteriorated Credit accounted for under ASC 310-30 during 2017 or 2016. Quality (“ASC 310-30”). The Company did not acquire any loans rr Net unearned income: The following table provides additional detail related to the net discount of acquired and purchased loans, excluding PCI loans, by acquisition for the periods indicated: Acquisition: Pacific Continental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intermountain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . West Coast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total net discount at period end . . . . . . . . . . . . . . . . . . . . . (in thousands) 24,556 $ — $ 3,892 7,995 (134) 6,599 13,957 (315) $ 36,309 $ 20,241 $ — 8,237 24,367 (432) 32,172 2017 2016 2015 For additional information on our loan portfolio, including amounts pledged as collateral on borrowings, see Note 5 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. Maturities and Sensitivities of Loans to Changes in Interest Rates The following table presents the maturity distribution of our commercial and real estate construction loan portfolios and the sensitivity of these loans due after one year to changes in interest rates as of December 31, 2017: Maturing Due Through 1 Year Over 1 Through 5 Years Over 5 Years Total (in thousands) Commercial business . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Real estate construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 1,228,162 337,472 $ 1,565,634 Fixed rate loans due after 1 year . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Variable rate loans due after 1 year . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ $ $ 693,283 45,579 738,862 409,028 329,834 738,862 $ 1,468,507 190,182 $ 1,658,689 $ 1,161,048 497,641 $ 1,658,689 $ 3,389,952 573,233 $ 3,963,185 $ 1,570,076 827,475 $ 2,397,551 Risk Elements The extension of credit in the form of loans or other credit substitutes to individuals and businesses is one of our principal commerce activities. Our policies, applicable laws, and regulations require risk analysis as well as ongoing portfolio and credit management. We manage our credit risk through lending limit constraints, credit review,ww approval policies, and extensive, ongoing internal monitoring. We also manage credit risk through diversification of the loan portfolio by type of loan, type of industry,yy type of borrower, and by limiting the aggregation of debt to a single borrower. In analyzing our existing portfolio, we review our consumer and residential loan portfolios by their performance as a pool of loans, since no single loan is individually significant or judged by its risk rating, size or potential risk of loss. In contrast, the monitoring process for the commercial business, real estate construction, and commercial real estate portfolios includes periodic reviews of individual loans with risk ratings assigned to each loan and performance judged on a loan by loan basis. 41 We review these loans to assess the ability of our borrowers to service all interest and principal obligations and, as a result, the risk rating may be adjusted accordingly. In the event that full collection of principal and interest is not reasonably assured, the loan is appropriately downgraded and, if warranted, placed on nonaccrual status even though the loan may be current as to principal and interest payments. Additionally,yy we assess whether an impairment of a loan warrants specific reserves or a write-down of the loan. For additional discussion on our methodology in managing credit risk within our loan portfolio see the following “Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit” section and Note 1 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. Loan policies, credit quality criteria, portfolio guidelines and other controls are established under the guidance of our ff and approved, as appropriate, by the board of directors. Credit Administration, together with the Chief Credit Officer management loan committee, has the responsibility for administering the credit approval process. As another part of its control process, we use an internal credit review and examination function to provide reasonable assurance that loans and commitments are made and maintained as prescribed by our credit policies. This includes a review of documentation when the loan is initially extended and subsequent examination to ensure continued performance and proper risk assessment. Nonperforming Assets Nonperforming assets consist of: (i) nonaccrual loans, which generally are loans placed on a nonaccrual basis when the loan becomes past due 90 days or when there are otherwise serious doubts about the collectability of principal or interest within the existing terms of the loan, (ii) OREO, and (iii) OPPO, if applicable. Nonperforming assets totaled $79.5 million, or 0.63% of year end assets at December 31, 2017, compared to $33.8 million, or 0.35% of year end assets at December 31, 2016. The following table sets forth information with respect to our nonaccrual loans, total nonperforming assets, accruing loans past-due 90 days or more and potential problem loans: Nonaccrual: Commercial business . . . . . . . . . . . . . . . . . . . . . . . . Real estate: One-to-four family residential . . . . . . . . . . . . . Commercial and multifamily residential. . . . . . Real estate construction: One-to-four family residential . . . . . . . . . . . . . Commercial and multifamily residential. . . . . . Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total nonaccrual loans: . . . . . . . . . . . . . . . . . . . Other real estate owned and other personal property owned. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total nonperforming assets . . . . . . . . . . . . . . . . Accruing loans past-due 90 days or more . . . . . . . . . . . . Forgone interest on nonperforming loans . . . . . . . . . . . . Interest recognized on nonperforming loans . . . . . . . . . . Potential problem loans . . . . . . . . . . . . . . . . . . . . . . . . . . Allowance for loan and lease losses . . . . . . . . . . . . . . . . Nonperforming loans to year end loans. . . . . . . . . . . . . . Nonperforming assets to year end assets. . . . . . . . . . . . . December 31, 2017 2016 2015 2014 2013 (dollars in thousands) $ 45,460 $ 11,555 $ 9,437 $ 16,799 $ 12,609 785 13,941 1,854 — 4,149 66,189 $ 79,487 581 $ $ 2,400 971 $ $ 41,642 $ 75,646 568 11,187 563 — 3,883 27,756 820 9,513 928 — 766 21,464 2,822 7,847 465 480 2,939 31,352 13,738 $ 35,202 5,998 $ 33,754 $ $ 1,919 237 $ $ 31,744 $ 70,043 22,225 $ 53,577 1,386 — $ 2,196 $ 1,327 $ $ 7,846 $ 69,569 — $ $ 1,287 202 $ $ 23,654 $ 68,172 2,667 11,043 3,705 — 3,991 34,015 36,036 $ 70,051 — $ $ 2,860 1,306 $ $ 13,356 $ 72,454 0.79% 0.63% 0.45% 0.35% 0.37% 0.39% 0.58% 0.62% 0.75% 0.98% At December 31, 2017, nonperforming loans increased to 0.79% of year end loans, up from 0.45% of year end loans at December 31, 2016. The largest increase in nonperforming loans was in commercial business loans, which increased from $11.6 million, or 42% of nonperforming loans at December 31, 2016 to $45.5 million, or 69% of nonperforming loans at year end 2017. The increase in nonperforming commercial loans was primarily due to a small number of larger loans migrating to nonaccrual, as well as the addition of $6.3 million in nonaccrual commercial business loans from the Pacific Continental acquisition. The Pacific Continental acquisition added a total of $9.4 million in nonaccrual loans. 42 Other Real Estate Owned and Other Personal Property Owned: As of December 31, 2017, there was $13.3 million in OREO and OPPO, which was primarily comprised of property from foreclosed real estate loans, an increase of $7.3 million from $6.0 million at December 31, 2016. The increase was primarily driven by the addition of $10.3 million of OREO from the Pacific Continental acquisition, partially offset foreclosure are transferred to OREO and are recorded at fair value less estimated costs to sell, at the date of transfer of the property. If the carrying value exceeds the fair value at the time of the transfer, the difference loan and lease losses. The fair value of the OREO property is based upon current appraisal. Subsequent losses that result from the ongoing periodic valuation of these properties are charged to the net cost of operation of OREO expense in the period in which they are identified. In general, improvements to the OREO are capitalized and holding costs are charged to the net cost of operation of OREO as incurred. by $2.7 in OREO sales. Properties acquired by foreclosure or deed in lieu of is charged to the allowance for ff ff Potential Problem Loans: Potential problem loans are loans which are currently performing and are not on nonaccrual status, restructured or impaired, but about which there are significant doubts as to the borrower’s future ability to comply with repayment terms and which may later be included in nonaccrual, past due, restructured or impaired loans. Potential problem loans totaled $41.6 million at year end 2017, compared to $31.7 million at year end 2016. The following table summarizes activity in nonperforming loans for the period indicated: Balance, beginning of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Established through acquisitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loans placed on nonaccrual or restructured . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Advances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Charge-offsff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loans returned to accrual status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Repayments (including interest applied to principal) . . . . . . . . . . . . . . . . . . . . . . . . . Transfers to OREO/OPPO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Balance, end of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ Years Ended December 31, 2017 2016 (in thousands) 27,756 9,413 62,450 (2,182) (8,566) (23,022) (72) 66,189 $ $ 21,464 — 42,006 492 (6,600) (4,649) (24,834) (123) 27,756 Loans are considered impaired when based on current information and events, it is probable that the Company will be ff that lead to a restructuring of the loan, and the Company grants concessions to the borrower in the restructuring that unable to collect all amounts due according to the contractual terms of the loan agreement or when a loan has been modified in a troubled debt restructuring. A loan is classified as a troubled debt restructuring when a borrower is experiencing financial difficulties it would not otherwise consider. These concessions may include interest rate reductions, principal forgiveness, extension of maturity date and other actions intended to minimize potential losses. Generally,yy a nonaccrual loan that is restructured remains on nonaccrual status for a period of six months to demonstrate that the borrower can meet the restructured terms. If the borrower’s performance under the new terms is not reasonably assured, the loan remains classified as a nonaccrual loan. The assessment for impairment occurs when and while such loans are designated as classified per the Company’s internal risk rating system or when and while such loans are on nonaccrual. All nonaccrual loans greater than $500,000 and all troubled debt restructured loans are considered impaired and analyzed individually on a quarterly basis. Classified loans with an outstanding balance greater than $500,000 are evaluated for potential impairment on a quarterly basis. The Company’s policy is to record cash receipts on impaired loans first as reductions in principal and then as interest income. 43 The following table summarizes impaired loan financial data at December 31, 2017 and 2016: December 31, 2017 2016 (in thousands) Impaired loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Impaired loans with specific allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Amount of the specific allocations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ $ 69,205 12,848 2,360 $ $ $ 25,459 7,867 761 Impaired loans with a carrying amount of $69.2 million at December 31, 2017 were subject to specific allocations of allowance for loan and lease losses of $2.4 million and partial charge-offsff of $438 thousand during the year. Collateral dependent impaired loans without specific allocations at December 31, 2017 and 2016 either had collateral which exceeded the carrying value of the loans or reflected a partial charge-offff to the market value of collateral (less costs to sell), as of the most recent appraisal date. Restructured loans accruing interest totaled $16.4 million and $6.2 million at December 31, 2017 and 2016, respectively. When a loan with unique risk characteristics has been identified as being impaired, the amount of impairment will be measured by the Company using discounted cash flows, except when it is determined that the remaining source of repayment for the loan is the operation or liquidation of the underlying collateral. In these cases, the current fair value of the collateral, reduced by costs to sell, will be used in place of discounted cash flows. As a final alternative, the observable market price of the debt may be used to assess impairment. Predominately,yy the Company uses the fair value of collateral approach based upon a reliable valuation. When a loan secured by real estate migrates to nonperforming and impaired status and it does not have a market valuation less than one year old, the Company secures an updated market valuation by a third-party appraiser that is reviewed by the Company’s on-staffff appraiser. Subsequently,yy the asset will be appraised annually by a third-party appraiser or the Company’s on-staffff appraiser. The evaluation may occur more frequently if management determines that there has been increased market deterioration within a specific geographical location. Upon receipt and verification of the market valuation, the Company will record the loan at the lower of cost or market (less costs to sell) by recording a charge-offff to the allowance for loan and lease losses or by designating a specific reserve in accordance with accounting principles generally accepted in the United States. For additional information on our nonperforming loans, see Note 5 to our Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit The allowance for loan and lease losses (“ALLL”) is an accounting estimate of incurred credit losses in our loan portfolio at the balance sheet date. The provision for loan and lease losses is the expense recognized in the Consolidated Statements of Income to adjust the allowance to the levels deemed appropriate by management, as measured by the Company’s credit loss estimation methodologies. The allowance for unfunded commitments and letters of credit is maintained at a level believed by to absorb estimated probable losses related to these unfunded credit facilities at the balance sheet management to be sufficient date. ff 44 Analysis of the ALLL The following table provides an analysis of our loan loss experience by loan type for the last five years: Changes in Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit Beginning balance. . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 70,043 $ 68,172 Charge-offs: ff 2017 2016 December 31, 2015 (dollars in thousands) $ 69,569 $ 2014 2013 72,454 $ 82,300 Commercial business . . . . . . . . . . . . . . . . . . . . . (7,613) (10,068) (8,266) (4,289) (4,942) Real estate: One-to-four family residential . . . . . . . . . . Commercial and multifamily residential . . Real estate construction: One-to-four family residential . . . . . . . . . . Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Purchased credit impaired. . . . . . . . . . . . . . . . . . (460) (287) (14) (1,474) ) (35) (89) (88) (1,238) (9,944) Total charge-offsff . . . . . . . . . . . . . . . . . . . . . (16,660) (21,462) Recoveries: Commercial business . . . . . . . . . . . . . . . . . . . . . 4,836 Real estate: One-to-four family residential . . . . . . . . . . Commercial and multifamily residential . . Real estate construction: One-to-four family residential . . . . . . . . . . Commercial and multifamily residential . . 568 675 178 1 Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,187 Purchased credit impaired. . . . . . . . . . . . . . . . . . Total recoveries. . . . . . . . . . . . . . . . . . . . . . 13,632 Net charge-offsff . . . . . . . . . . . . . . . . . Provision (recapture) for loan and lease losses. . . . . . ) 8,631 2,645 171 1,402 291 109 933 7,004 12,555 (8,907) 10,778 (376) (505) — (2,066) (13,854) (25,067) 2,336 307 3,975 193 8 931 7,329 15,079 (9,988) 8,591 (230) (2,993) — (2,774) (14,436) (24,722) 3,007 159 940 1,930 — 1,353 7,721 15,110 (9,612) 6,727 (228) (2,543) (133) (2,242) (13,852) (23,940) 2,444 270 1,033 2,665 — 552 7,231 14,195 (9,745) (101) Ending balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 75,646 $ 70,043 $ 68,172 $ 69,569 $ 72,454 Loans outstanding at end of period (1) . . . . . . . . . . . . $ 8,358,657 $ 6,213,423 $ 5,815,027 $ 5,445,378 $ 4,517,296 Average amount of loans outstanding (1) . . . . . . . . . . $ 6,682,259 $ 6,052,389 $ 5,609,261 $ 4,782,369 $ 4,140,826 Allowance for loan and lease losses to period-end loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net charge-offsff to average loans outstanding. . . . . . . Allowance for unfunded commitments and letters of credit 0.91% 0.05% 1.13% 0.15% 1.17% 0.18% 1.28% 0.20% 1.60% 0.24% Beginning balance. . . . . . . . . . . . . . . . . . . . . . . . . . . . Net changes in the allowance for unfunded commitments and letters of credit. . . . . . . . . . . . . . Ending balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ 2,705 425 3,130 $ $ 2,930 (225) 2,705 $ $ 2,655 275 2,930 $ $ 2,505 150 2,655 $ $ 1,915 590 2,505 __________ (1) Excludes loans held for sale. 45 At December 31, 2017, our ALLL was $75.6 million, or 0.91% of total loans (excluding loans held for sale). This compares with an allowance of $70.0 million, or 1.13% of total loans (excluding loans held for sale) at December 31, 2016. This decrease in the allowance relative to loans in the current period as compared to December 31, 2016 was primarily impacted by the acquisition of Pacific Continental. We have used the same methodology for ALLL calculations during 2017, 2016 and 2015. Adjustments to the percentages of the ALLL allocated to loan categories are made based on trends with respect to delinquencies and problem loans within each loan class. The Bank reviews the ALLL quantitative and qualitative methodology on a quarterly basis and makes adjustments when appropriate. We continue to make revisions to our ALLL as necessary to maintain adequate reserves. The Bank carefully monitors the loan portfolio and continues to emphasize the importance of credit quality while continuously strengthening loan monitoring systems and controls. Allocation of the ALLL The table below sets forth the allocation of the ALLL by loan category: 2017 2016 December 31, 2015 2014 2013 Balance at End of Period Applicable to: % of Total Loans* % of Total Loans* % of Total Loans* Amount % of Total Loans* % of Total Loans* Amount Amount Amount Amount (dollars in thousands) Commercial business. . . . . . . . $ 31,341 40.2% $ 37,010 41.0% $ 33,620 40.5% $ 26,850 38.8% $ 31,723 34.4% Real estate and construction: One-to-four family residential. . . . . . . . . . Commercial and multifamily residential. . . . . . . . . . 5,373 4.6% 1,584 4.7% 1,988 5.3% 5,338 5.3% 2,684 3.5% 26,862 49.9% Consumer. . . . . . . . . . . . . . . . . Purchase credit impaired . . . . . Unallocated . . . . . . . . . . . . . . . 6,907 — 4.0% 1.3% —% 17,174 3,534 10,515 226 46.8% 5.2% 2.3% —% 14,738 3,531 13,726 569 45.4% 5.7% 3.1% —% 16,021 3,180 16,336 1,844 45.4% 6.3% 4.2% —% 13,671 2,547 20,174 1,655 48.2% 7.3% 6.6% —% Total. . . . . . . . . . . . . . . . . . . . . $ 75,646 100.0% $ 70,043 100.0% $ 68,172 100.0% $ 69,569 100.0% $ 72,454 100.0% __________ * Represents the total of all outstanding loans in each category as a percent of total loans outstanding. FDIC Loss-sharing Asset During 2017, the Bank entered into an agreement with the FDIC to terminate all loss-sharing agreements ahead of their contractual maturities. These loss-sharing agreements were entered into in 2010 and 2011 in conjunction with our acquisitions of (1) Columbia River Bank in January 2010, (2) American Marine Bank in January 2010, (3) Summit Bank in May 2011 and (4) First Heritage Bank in May 2011. Under the early termination, all rights and obligations of the Company and the FDIC have been resolved and completed. For additional information on the early termination of the FDIC loss-sharing agreements, see Note 8 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. 46 Deposits The following table sets forth the composition of the Company’s deposits by significant category: 2017 December 31, 2016 (in thousands) 2015 Core deposits: Demand and other noninterest-bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest-bearing demand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Money market . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Savings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Certificates of deposit, less than $250,000 . . . . . . . . . . . . . . . . . . . . . . . . . Total core deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Certificates of deposit, $250,000 or more. . . . . . . . . . . . . . . . . . . . . . . . . . Certificates of deposit insured through CDARS® . . . . . . . . . . . . . . . . . . . Other brokered certificates of deposit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Brokered money market accounts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Subtotal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Premium (discount) resulting from acquisition date fair value adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 5,081,901 $ 3,944,495 $ 3,507,358 985,293 925,909 2,543,712 1,791,283 1,788,552 861,941 286,791 723,667 304,830 657,016 359,878 10,039,557 7,749,568 7,238,713 100,399 25,374 78,481 79,424 22,039 — 72,126 26,901 — 289,031 10,532,842 208,348 8,059,379 100,854 7,438,594 (757) 36 235 $10,532,085 $ 8,059,415 $ 7,438,829 Deposits totaled $10.53 billion at December 31, 2017 compared to $8.06 billion at December 31, 2016. The increase of $2.47 billion was due to the acquisition of Pacific Continental, which added $2.12 billion in deposits, and organic growth. Core deposits, which include noninterest-bearing deposits and interest-bearing deposits, excluding time deposits of $250,000 and over and brokered deposits, provide a stable source of low cost funding. Core deposits increased to $10.04 billion at December 31, 2017 compared with $7.75 billion at December 31, 2016. We anticipate continued growth in our core deposits through both the addition of new customers and our current client base. At December 31, 2017, brokered and other wholesale deposits (excluding public deposits) totaled $392.9 million or 3.7% of total deposits compared to $230.4 million or 2.9% of total deposits, at year-end 2016. The increase in brokered deposits is attributed to brokered deposits of $78.5 million related to the Pacific Continental acquisition as well as an increase in participation in the brokered money market account program, which is similar to the Certificate of Deposit Account Registry Service (“CDARS®”) program. CDARS® is a network that allows participating banks to offer coverage on time deposits. These extended deposit insurance programs are generally available only to existing customers and are not used as a means of generating additional liquidity. extended FDIC deposit insurance ff At December 31, 2017, public deposits held by the Company totaled $467.3 million compared to $427.7 million at December 31, 2016. Uninsured public deposit balances increased from $368.2 million at December 31, 2016 to $405.8 million at December 31, 2017. The Company is required to collateralize 50% of Washington state and 40% of Oregon state public deposits. 47 The following table sets forth the amount outstanding of time certificates of deposit and other time deposits in amounts of $100,000 or more (which represent CDARS® accounts and other brokered time deposits) by time remaining until maturity and percentage of total deposits: Amounts maturing in: Three months or less . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Over 3 through 6 months . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Over 6 through 12 months . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Over 12 months . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . December 31, 2017 Time Certificates of Deposit of $100,000 or More Other Time Deposits of $100,000 or More Amount $ 78,139 23,444 49,435 $ 189,053 Percent of Total Deposits Amount Percent of Total Deposits (dollars in thousands) 18,902 0.7% $ 10,134 0.2% 14,446 0.5% 0.4% 58,763 1.8% $ 102,245 0.2% 0.1% 0.1% 0.6% 1.0% The following table sets forth the average amount of and the average rate paid on each significant deposit category: 2017 Years ended December 31, 2016 2015 Average Deposits Rate Average Deposits Rate Average Deposits Interest bearing demand . . . . . . . . . . . . . . . . Money market . . . . . . . . . . . . . . . . . . . . . . . . Savings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Certificates of deposit . . . . . . . . . . . . . . . . . . Total interest-bearing deposits. . . . . . . . . . . . Demand and other non-interest bearing . . . . Total average deposits . . . . . . . . . . . . . . $ 1,031,719 2,158,656 774,340 4,371,121 4,111,229 $ 8,482,350 (dollars in thousands) 0.09% $ 0.14% 0.01% 0.16% 0.11% 952,135 1,993,283 698,687 426,296 4,070,401 3,703,908 $ 7,774,309 0.07% $ 0.09% 0.01% 0.12% 0.08% 982,491 1,834,733 637,464 483,193 3,937,881 3,208,947 $ 7,146,828 Rate 0.06% 0.08% 0.01% 0.18% 0.08% Borrowings Borrowed funds provide an additional source of funding for loan growth. Our borrowed funds consist primarily of borrowings from the FHLB Des Moines (“FHLB”) and Federal Reserve Bank (“FRB”) as well as securities repurchase agreements. FHLB and FRB borrowings are secured by our loan portfolio and investment securities. Securities repurchase agreements are secured by investment securities. For additional information on our borrowings, see Notes 12, 13, 14 and 15 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. Off-Balance Sheet Arrangements In the normal course of business, the Company is a party to financial instruments with off-balance ff sheet risk. These financial instruments include commitments to extend credit and standby letters of credit. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount reflected in the Consolidated Balance Sheets. Exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual notional amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The Company evaluates each client’s creditworthiness on a case-by-case basis. Commitments to extend credit are agreements to lend to a client as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since a portion of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. ff The Company had off-balance sheet loan commitments aggregating $2.62 billion at December 31, 2017, an increase from $2.17 billion at December 31, 2016. Standby letters of credit were $51.3 million at December 31, 2017, an increase from $49.7 million at December 31, 2016. In addition, commitments under commercial letters of credit used to facilitate customers’ trade transactions and other off-balance 2016, respectively. sheet liabilities amounted to $159 thousand and $3.4 million at December 31, 2017 and ff 48 Contractual Obligations & Commitments We are party to many contractual financial obligations, including repayment of borrowings, operating and equipment lease payments, and commitments to extend credit. The table below presents certain future financial obligations of the Company: Operating & equipment leases . . . . . . . . . . . Total deposits (1) . . . . . . . . . . . . . . . . . . . . . Federal Home Loan Bank advances (1) . . . . Subordinated debentures (1) . . . . . . . . . . . . . Junior subordinated debentures (1). . . . . . . . Other borrowings (1) . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . Payments due within time period at December 31, 2017 0-12 Months 1-3 Years $ 10,994 $ 19,188 10,379,999 108,904 4,000 — 8,248 — — — — 4-5 Years (in thousands) 13,407 $ 33,456 2,000 — — — Due after Five Years Total $ 14,482 $ 58,071 9,726 5,000 35,000 — — 10,532,085 11,000 35,000 8,248 79,059 $ 10,482,300 $ 128,092 $ 48,863 $ 64,208 $ 10,723,463 __________ (1) In the banking industry,yy interest-bearing obligations are principally used to fund interest-earning assets. As such, interest charges on contractual obligations were excluded from reported amounts, as the potential cash outflows would have corresponding cash inflows from interest-earning assets. For additional information regarding future financial commitments, see Note 18 to our Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of this report. Liquidity and Sources of Funds In general, our primary sources of funds are net income, loan repayments, maturities and principal payments on investment securities, customer deposits, advances from the FHLB, securities repurchase agreements and other borrowings. These funds are used to make loans, purchase investments, meet deposit withdrawals and maturing liabilities and cover operational expenses. Scheduled loan repayments and core deposits have proved to be a relatively stable source of funds while other deposit inflows and unscheduled loan prepayments are influenced by interest rate levels, competition and general economic conditions. We manage liquidity through monitoring sources and uses of funds on a daily basis and had unused credit lines with the FHLB and the FRB of $1.43 billion and $100.1 million, respectively,yy at December 31, 2017, that are available to us as a supplemental funding source. The holding company’s sources of funds are dividends from its banking subsidiary which are used to fund dividends to shareholders and cover operating expenses. In addition, we have a shelf registration statement on file with the Securities and Exchange Commission registering an unlimited amount of any combination of debt or equity securities, depositary shares, purchase contracts, units and warrants in will be provided at the time ff one or more offerings. of any offering. ff limited to, the repayment of debt, repurchasing or redeeming outstanding securities, working capital, funding future acquisitions or other purposes identified at the time of any offering. Specific information regarding the terms of and the securities being offered are expected to be used for general corporate purposes, including, but not Proceeds from any future offerings ff ff ff 49 Capital Our shareholders’ equity increased to $1.95 billion at December 31, 2017, from $1.25 billion at December 31, 2016, primarily due to shares issued in conjunction with the acquisition of Pacific Continental. Shareholders’ equity was 15.33% and 13.16% of total assets at December 31, 2017 and 2016. Regulatory Capital. In July 2013, the federal bank regulators approved the New Capital Rules (as discussed in “Item 1. Business—Supervision and Regulation and —Regulatory Capital Requirements”), which implement the Basel III capital framework and various provisions of the Dodd-Frank Act. We and the Bank were required to comply with these rules as of January 1, 2015, subject to the phase-in of certain provisions. We believe that, as of December 31, 2017, we and the Bank would meet all capital adequacy requirements under the New Capital Rules on a fully phased-in basis as if all such requirements were then in effect. ff Basel III also introduced a new capital conservation buffer ff , composed entirely of CET1, on top of the minimum risk ff is designed to absorb losses during periods of economic stress. Banking weighted asset ratios. The capital conservation buffer institutions with a ratio of CET1 to risk weighted assets, Tier 1 to risk weighted assets or total capital to risk weighted assets above the minimum but below the capital conservation buffer compensation based on the amount of the shortfall. The implementation of the capital conservation buffer 2016 at a 0.625% level and will increase by 0.625% on each subsequent January 1 until it reaches 2.5% on January 1, 2019. When fully phased in, the Company and the Bank will be required to maintain such additional capital conservation buffer of resulting in minimum ratios of (i) CET1 to risk weighted assets of at least 7%, (ii) Tier 1 capital to 2.5% of CET1, effectively risk weighted assets of at least 8.5%, and (iii) total capital to risk weighted assets of at least 10.5%. ff will face constraints on dividends, equity repurchases and began on January 1, ff ff ff FDIC regulations set forth the qualifications necessary for a bank to be classified as “well-capitalized,” primarily for assignment of FDIC insurance premium rates. Failure to qualify as “well-capitalized” can negatively impact a bank’s ability to expand and to engage in certain activities. The Company and the Bank qualified as “well-capitalized” at December 31, 2017 and 2016. The following table sets forth the Company’s and the Bank’s capital ratios at December 31, 2017 and 2016: Company Columbia Bank Requirements 2017 2016 2017 2016 Adequately Capitalized Well- Capitalized Common Equity Tier 1 risk-based capital ratio. . . . . . . . . . . 11.7421% 11.6450% 12.0133% 11.5051% Tier 1 risk-based capital ratio . . . . . . . . . . . . . . . . . . . . . . . . 11.8196% 11.6646% 12.0133% 11.5051% Total risk-based capital ratio . . . . . . . . . . . . . . . . . . . . . . . . . 12.9796% 12.6347% 12.8123% 12.4756% Leverage ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.9611% 9.5526% 10.8186% 9.4275% 4.50% 6.00% 8.00% 4.00% 6.50% 8.00% 10.00% 5.00% Stock Repurchase rr Program rr On September 27, 2017 the Board of Directors approved a stock repurchase program. The program authorizes the Company to repurchase up to 2.9 million shares of our outstanding common stock. The Company intends to purchase the shares from time to time in the open market or in private transactions, under conditions which allow such repurchases to be accretive to earnings per share while maintaining capital ratios that exceed the guidelines for a well-capitalized financial institution. Dividends The following table sets forth the dividends paid per common share and the dividend payout ratio (dividends paid per common share divided by basic earnings per share): Dividends paid per common share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dividend payout ratio (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Years ended December 31, 2017 2016 2015 $ 0.88 $ 1.53 $ 1.34 85% 78% ______________ (1) Dividends paid per common share as a percentage of earnings per diluted common share For quarterly detail of dividends declared during 2017 and 2016, including special dividends declared, see “Item 5. Market for Registrant’s Common Equity,yy Related Stockholder Matters and Issuer Purchases of Equity Securities” of this report. 50 Subsequent to year end, on January 25, 2018 the Company declared a quarterly cash dividend of $0.22 per share payable on February 21, 2018, to shareholders of record at the close of business on February 7, 2018. Applicable federal and Washington state regulations restrict capital distributions, including dividends, by the Company’s to distributions. Our ability to banking subsidiary. Such restrictions are tied to the institution’s capital levels after giving effect pay cash dividends is substantially dependent upon receipt of dividends from the Bank. In addition, the payment of cash dividends is subject to Federal regulatory requirements for capital levels and other restrictions. In this regard, current guidance from the Federal Reserve provides, among other things, that dividends per share on the Company’s common stock generally should not exceed earnings per share, measured over the previous four fiscal quarters. ff Reference “Item 6. Selected Financial Data” of this report for our return on average assets, return on average equity and average equity to average assets ratios for all reported periods. Non-GAAP Financial Measures In addition to capital ratios defined by banking regulators, the Company considers various measures when evaluating capital utilization and adequacy,yy including: • • Tangible TT TT Tangible common equity to tangible assets, and common equity to risk-weighted assets. The Company believes these measures are useful because they reflect the level of capital available to withstand unexpected market conditions. Additionally,yy presentation of these measures allows readers to compare certain aspects of the Company’s capitalization to other organizations. These ratios differ principally in that the numerator excludes shareholders’ equity associated with preferred securities, the nature and extent of which varies across organizations. Additionally,yy these measures present capital adequacy inclusive and exclusive of accumulated other comprehensive income. These calculations are intended to complement the capital ratios defined by banking regulators for both absolute and comparative purposes. from capital measures defined by banking regulators ff Because generally accepted accounting principles in the United States of America (“GAAP”) do not include capital ratio measures, the Company believes there are no comparable GAAP financial measures to these tangible common equity ratios. The following table reconciles the Company’s calculation of these measures to amounts reported under GAAP.PP Despite the importance of these measures to the Company,yy there are no standardized definitions for them and, as a result, the Company’s calculations may not be comparable with other organizations. The Company encourages readers to consider its Consolidated Financial Statements in their entirety and not to rely on any single financial measure. Shareholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Goodwill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other intangible assets, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preferred stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tangible common equity (a) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Goodwill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Core deposit intangible . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tangible assets (b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Risk-weighted assets, determined in accordance with prescribed regulatory December 31, 2017 December 31, 2016 (dollars in thousands) $ 1,949,922 (765,842) $ 1,251,012 (382,762) (58,173) 1,125,907 12,716,886 (765,842) (17,631) 2,217) 848,402 9,509,607 (382,762) (58,173) $ 11,892,871 (17,631) $ 9,109,214 requirements (c) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 9,864,129 $ 7,498,654 Ratios Tangible common equity to tangible assets (a)/(b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tangible common equity to risk-weighted assets (a)/(c) . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.47% 11.41% 9.31% 11.31% 51 The Company also considers operating net interest margin (tax equivalent) to be a useful measurement as it closely reflects the ongoing operating performance of the Company. Additionally,yy presentation of the operating net interest margin allows readers to compare certain aspects of the Company’s net interest margin to other organizations that may not have had significant acquisitions. Despite the usefulness of the operating net interest margin to the Company,yy there is no standardized definition for it and, as a result, the Company’s calculations may not be comparable with other organizations. The Company encourages readers to consider its Consolidated Financial Statements in their entirety and not to rely on any single financial measure. The following table reconciles the Company’s calculation of the operating net interest margin (tax equivalent) to the net interest margin (tax equivalent) for the periods indicated: Operating net interest margin non-GAAP reconciliation: Years ended December 31, 2017 2016 2015 (dollars in thousands) Net interest income (tax equivalent) (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 380,107 $ 344,425 $ 334,548 Adjustments to arrive at operating net interest income (tax equivalent): Incremental accretion income on FDIC purchased credit impaired loans . . . . . . . . . . . . (4,107) (5,972) Incremental accretion income on other FDIC acquired loans (2) . . . . . . . . . . . . . . . . . . Incremental accretion income on other acquired loans . . . . . . . . . . . . . . . . . . . . . . . . . . (8,689) (11,983) Premium amortization on acquired securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Correction of immaterial error - securities premium amortization (3) . . . . . . . . . . . . . . Interest reversals on nonaccrual loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,636 1,771 7,738 — 1,072 (9,096) (234) (17,862) 10,217 — 1,713 Operating net interest income (tax equivalent) (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 377,484 $ 335,280 $ 319,286 Average interest earning assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 9,098,276 $ 8,363,309 $ 7,685,734 Net interest margin (tax equivalent) (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating net interest margin (tax equivalent) (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.18% 4.15% 4.12% 4.01% 4.35% 4.15% __________ (1) Tax-exempt interest income has been adjusted to a tax equivalent basis. The amount of such adjustment was an addition to net interest income of $12.1 million, $10.8 million and $9.7 million for the years ended December 31, 2017, 2016 and 2015, respectively. (2) For 2017 and 2016, incremental accretion income on other FDIC acquired loans was no longer considered significant. (3) For further information on this item, see Note 1 to the Consolidated Financial Statement in “item 8. Financial Statements and Supplementary Data” of this report. 52 ITEM 7A. QUANTITATTT IVE AND QUALITATTT IVE DISCLOSURES ABOUT MARKET RISK Interest Rate Sensitivity We are exposed to interest rate risk, which is the risk that changes in prevailing interest rates will adversely affect times or in different assets, amounts. Generally,yy there are four sources of interest ff ff liabilities, capital, income and expenses at different rate risk as described below: ff because of differences in the timing of when those interest rate changes affect ff an institution’s assets and liabilities. risk is the risk of adverse consequences from a change in interest rates that arises kk Repricing risk—Repricing ff kk Basis risk—Basis two or more rates for different ff risk is the risk of adverse consequence resulting from unequal changes in the spread between instruments with the same maturity. between two or more rates for different Yield curve risk—Ykk ieldYY ff maturities for the same instrument. curve risk is the risk of adverse consequence resulting from unequal changes in the spread Option risk—In kk banking, option risks are known as borrower options to prepay loans and depositor options to make deposits, withdrawals, and early redemptions. Option risk arises whenever bank products give customers the right, but not the obligation, to alter the quantity or the timing of cash flows. An Asset/Liability Management Committee is responsible for developing, monitoring and reviewing asset/liability processes, interest rate risk exposures, strategies and tactics and reporting to the board of directors. It is the responsibility of the board of directors to establish policies and interest rate limits and approve these policies and interest rate limits annually. It is the responsibility of management to execute the approved policies, develop and implement risk management strategies and to report to the board of directors on a regular basis. We maintain an asset/liability management policy that provides guidelines for controlling exposure to interest rate risk. The policy guidelines direct management to assess the impact of changes in interest rates upon both earnings and capital. The guidelines establish limits for interest rate risk sensitivity. Interest Rate Risk Sensitivity A number of measures are used to monitor and manage interest rate risk, including income simulations, interest sensitivity (gap) analysis and economic value of equity sensitivity. An income simulation model is the primary tool used to assess the direction and magnitude of changes in net interest income resulting from changes in interest rates. Key assumptions in the model include prepayment speeds on loans and investment securities, decay rates on non-maturity deposits, investment security,yy loan, deposit and borrowing volumes and pricing. These assumptions are inherently uncertain and, as a result, the net interest income projections should be viewed as an estimate of the net interest income sensitivity at the time of the analysis. Actual results will differ market conditions and management strategies, among other factors. from simulated results due to timing, magnitude and frequency of interest rate changes and changes in ff Based on the results of the simulation model as of December 31, 2017, we would expect decreases in net interest income of $17.3 million and $43.2 million in year one and year two, respectively,yy if interest rates gradually decrease from current rates by 100 basis points. We would expect an increase in net interest income of $9.1 million and $37.1 million in year one and year two, respectively,yy if interest rates gradually increase from current rates by 200 basis points. The analysis of an institution’s interest rate gap (the difference ff interest-bearing liabilities during a given period of time) is one standard tool for the measurement of the exposure to interest rate risk. We believe that because interest rate gap analysis does not address all factors that can affect should be used in conjunction with other methods of evaluating interest rate risk. between the repricing of interest-earning assets and earnings performance, it ff The table on the following page sets forth the estimated maturity or repricing, and the resulting interest rate gap of our interest-earning assets and interest-bearing liabilities at December 31, 2017. The amounts in the table are derived from our internal data and are based upon regulatory reporting formats. Therefore, they may not be consistent with financial information appearing elsewhere herein that has been prepared in accordance with accounting principles generally accepted in the United States. The estimates for net interest income sensitivity and interest rate gap could be significantly affected ff by external factors such as changes in prepayment assumptions, early withdrawal of deposits and competition. For example, although certain assets and liabilities may have similar maturities or periods to repricing, they may react in different degrees to changes in market interest rates. Also, the interest rates on certain types of assets and liabilities may fluctuate in advance of changes in market interest rates, while other types may lag changes in market interest rates. ff 53 Additionally,yy certain assets, such as adjustable-rate mortgages, have features that restrict changes in the interest rates of such assets both on a short-term basis and over the lives of such assets. Further, in the event of a change in market interest rates, prepayment and early withdrawal levels could deviate significantly from those assumed in calculating the tables. Finally,yy the ability of many borrowers to service their adjustable-rate debt may decrease in the event of a substantial increase in market interest rates. December 31, 2017 Estimated Maturity or Repricing 0-3 months 4-12 months Over 1 year through 5 years (dollars in thousands) Due after 5 years Total Interest-Earning Assets . . . . . . . . . . . . . . . Interest-earning deposits . . . . . . . . . . . Loans, net of deferred fees . . . . . . . . . . Loans held for sale . . . . . . . . . . . . . . . . Investments. . . . . . . . . . . . . . . . . . . . . . Total interest-earning assets . . . . . $ 97,918 3,150,444 5,766 144,031 $ 3,398,159 $ — $ — $ — $ 924,333 — 348,828 $ 1,273,161 3,235,733 — 1,388,516 $ 4,624,249 1,048,147 — 871,896 $ 1,920,043 97,918 8,358,657 5,766 2,753,271 11,215,612 Allowance for loan and lease losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cash and due from banks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Premises and equipment, net. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244,615 169,490 1,162,815 $ 12,716,886 Interest-Bearing Liabilities Interest-bearing non-maturity $ — $ Time deposits . . . . . . . . . . . . . . . . . . . . Subordinated debentures . . . . . . . . . . . Borrowings . . . . . . . . . . . . . . . . . . . . . . Total interest-bearing liabilities. . . deposits . . . . . . . . . . . . . . . . . . . . . . . $ 4,959,896 145,094 — 87,307 , $ 5,192,297 Other liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Shareholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total liabilities and shareholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . — $ 4,959,896 490,288 35,647 98,886 5,584,717 5,182,247 10,766,964 1,949,922 , , $ 12,716,886 143,266 35,647 2,000 , 180,913 193,373 — 4,000 , 197,373 8,555 — 5,579 , 14,134 — $ $ $ $ , Interest-bearing liabilities as a percent of total interest-earning assets . . . . . . . . . . . Rate sensitivity gap . . . . . . . . . . . . . . . . . . . Cumulative rate sensitivity gap . . . . . . . . . . Rate sensitivity gap as a percentage of interest-earning assets . . . . . . . . . . . . . . . Cumulative rate sensitivity gap as a percentage of interest-earning assets . . . . Impact of Inflation and Changing Prices 46.30 % 1.76 % 1.61% 0.13% $ (1,794,138) $ (1,794,138) $ 1,075,788 $ (718,350) $ 4,443,336 $ 3,724,986 $ 1,905,909 $ 5,630,895 (16.00)% 9.59 % 39.62% 16.99% (16.00)% (6.40)% 33.21% 50.21% The impact of inflation on our operations is increased operating costs. Unlike most industrial companies, virtually all the assets and liabilities of a financial institution are monetary in nature. As a result, interest rates generally have a more significant impact on a financial institution’s performance than the effect necessarily move in the same direction or to the same extent as the prices of goods and services, increases in inflation generally have resulted in increased interest rates. of general levels of inflation. Although interest rates do not ff 54 ITEM 8. FINANCIAL STATTT EMENTS AND SUPPLEMENTARTT YRR DATAAA REPORTRR OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the shareholders and Board of Directors of Columbia Banking System, Inc. Opinion on the Financial Statements We have audited the accompanying Consolidated Balance Sheets of Columbia Banking System, Inc. and its subsidiaries (the “Company”) as of December 31, 2017 and 2016, and the related Consolidated Statements of Income, Comprehensive Income, Changes in Shareholders’ Equity,yy and Cash Flows for each of the three years in the period ended December 31, 2017. In our opinion, the financial statements present fairly,yy in all material respects, the financial position of the Company as of December 31, 2017 and 2016, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2017, in conformity with accounting principles generally accepted in the United States of America. We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2017, based on criteria established in Internal Controlrr Treadway Commission, and our report dated February 28, 2018, expressed an unqualified opinion on the Company’s internal control over financial reporting. - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Basis for Opinion These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB. We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion. /s/ Deloitte & Touche LLP February 28, 2018 Seattle, Washington We have served as the Company’s auditor since 1997. 55 COLUMBIA BANKING SYSTEM, INC. BALANCE SHEETS CONSOLIDATEDAA ASSETS Cash and due from banks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest-earning deposits with banks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Securities available for sale at fair value (amortized cost of $2,768,605 and $2,299,037, respectively) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Federal Home Loan Bank stock at cost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loans held for sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loans, net of unearned income of ($52,111) and ($33,718), respectively . . . . . . . . . . . . . . . . Less: allowance for loan and lease losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loans, net. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FDIC loss-sharing asset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Premises and equipment, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other real estate owned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Goodwill. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other intangible assets, net. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LIABILITIES AND SHAREHOLDERS’ EQUITY Deposits: Noninterest-bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest-bearing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Federal Home Loan Bank advances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Securities sold under agreements to repurchase. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Subordinated debentures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Junior subordinated debentures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Commitments and contingent liabilities (Note 18) Shareholders’ equity: Preferred stock (no par value) December 31, 2017 December 31, 2016 (in thousands) December 31, 2017 December 31, 2016 (in thousands) $ 244,615 97,918 342,533 $ 193,038 31,200 224,238 2,742,831 10,440 5,766 8,358,657 75,646 8,283,011 — 40,881 169,490 13,298 765,842 58,173 284,621 , $ 12,716,886 , $ 5,081,901 5,450,184 10,532,085 11,579 79,059 35,647 8,248 100,346 10,766,964 2,278,577 10,240 5,846 6,213,423 70,043 6,143,380 3,535 30,074 150,342 5,998 382,762 17,631 256,984 , $ 9,509,607 , $ 3,944,495 4,114,920 8,059,415 6,493 80,822 — — 111,865 8,258,595 Authorized shares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Issued and outstanding . . . . . . . . . . . . . . . . . . . . . . . . . . 2,000 — 2,000 9 — 2,217 Common stock (no par value) Authorized shares. . . . . . . . . . . . . . . . . . . . . . . . . . Issued and outstanding. . . . . . . . . . . . . . . . . . . . . . 115,000 58,042 Retained earnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accumulated other comprehensive loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total shareholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total liabilities and shareholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115,000 73,020 1,634,705 (22,225) 1,949,922 , , $ 12,716,886 995,837 271,957 (18,999) 1,251,012 , , $ 9,509,607 See accompanying Notes to Consolidated Financial Statements. 56 COLUMBIA BANKING SYSTEM, INC. CONSOLIDATEDAA STATTT EMENTS OF INCOME Interest Income Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taxable securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tax-exempt securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Deposits in banks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest Expense Deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Federal Home Loan Bank advances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Subordinated debentures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other borrowings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net Interest Income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Provision for loan and lease losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net interest income after provision for loan and lease losses . . . . . . . . . . . . . . . . . . Noninterest Income Deposit account and treasury management fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Card revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Financial services and trust revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loan revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Merchant processing revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bank owned life insurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Investment securities gains (losses), net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gain on sale of merchant card services portfolio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Change in FDIC loss-sharing asset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total noninterest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Noninterest Expense Compensation and employee benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Occupancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Merchant processing expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Advertising and promotion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Data processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Legal and professional fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taxes, licenses and fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Regulatory premiums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net cost (benefit) of operation of other real estate owned . . . . . . . . . . . . . . . . . . . . . . . . Amortization of intangibles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total noninterest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Income before income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Income tax provision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net Income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Earnings Per Common Share Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Weighted average number of common shares outstanding . . . . . . . . . . . . . . . . . . . . . . . . Weighted average number of diluted common shares outstanding . . . . . . . . . . . . . . . . . . Years ended December 31, 2017 2016 (in thousands except per share) 2015 $ $ $ $ $ 324,229 38,659 11,045 813 374,746 4,800 1,078 304 575 , 6,757 367,989 , 8,631 359,358 30,381 11,478 4,283 5,380 (11) 14,000 (447) , 6,552 109,642 169,674 32,407 2,196 4,466 18,205 15,151 4,773 3,183 468 6,333 34,161 , , 291,017 177,983 65,155 , , 12,828 1.86 .86 59,882 59,888 $ $ $ $ $ 291,465 35,167 11,121 216 337,969 3,134 671 — 545 , 4,350 333,619 , 10,778 322,841 28,500 23,620 11,266 10,967 8,732 4,546 1,181 — (2,585) , 1,855 88,082 150,282 33,734 4,330 4,598 16,488 7,889 5,185 3,777 551 5,946 28,362 , , 261,142 149,781 44,915 , , 104,866 1.81 1.81 57,184 57,193 286,166 30,774 11,842 109 328,891 2,977 474 — 553 , 4,004 324,887 , 8,591 316,296 28,451 22,690 12,596 10,932 8,975 4,441 1,581 — (4,010) , 5,817 91,473 149,410 34,818 4,204 4,713 17,421 9,608 5,395 4,806 (1,629) 6,882 30,521 , , 266,149 141,620 42,793 , , 98,827 1.71 1.71 57,019 57,032 $ $ $ See accompanying Notes to Consolidated Financial Statements. 57 COLUMBIA BANKING SYSTEM, INC. CONSOLIDATEDAA STATTT EMENTS OF COMPREHENSIVE INCOME Net income. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other comprehensive income (loss), net of tax: Unrealized loss from securities: Net unrealized holding loss from available for sale securities arising during the period, net of tax of $1,932, $7,025 and $3,455. . . . . . . . . Reclassification adjustment of net gain (loss) from sale of available for sale securities included in income, net of tax of ($4), $429 and $574 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net unrealized loss from securities, net of reclassification Years ended December 31, 2017 2016 2015 $ 112,828 (in thousands) 104,866 $ $ 98,827 (3,391) (12,338) (6,069) 7 (752) (1,007) adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (3,384) (13,090) (7,076) Pension plan liability adjustment: Unrecognized net actuarial gain (loss) and plan amendments during the period, net of tax of $2,287, $22 and $2,878 . . . . . . . . . . . . . . . . . Less: amortization of unrecognized net actuarial losses included in net periodic pension cost, net of tax of ($127), ($243) and ($122) . . . Pension plan liability adjustment, net . . . . . . . . . . . . . . . . . . . . . . . . . . . Other comprehensive income (loss) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Comprehensive income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (39) (5,054) 223 4,240 856 425 386 (12,704) 214 (4,840) (11,916) $ 113,684 $ 92,162 $ 86,911 See accompanying Notes to Consolidated Financial Statements. 58 CONSOLIDATEDAA STATTT EMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY COLUMBIA BANKING SYSTEM, INC. Preferred Stock Common Stock Number of Shares Number of Shares Amount Amount Retained Earnings Accumulated Other Comprehensive Income (Loss) Total Shareholders’ Equity Balance at January 1, 2015. . . . . . . . . . . . Net income . . . . . . . . . . . . . . . . . . . . . . . . . Other comprehensive loss . . . . . . . . . . . . . . Issuance of common stock - stock option and other plans. . . . . . . . . . . . . . . Issuance of common stock - restricted stock awards, net of canceled awards . . . Purchase and retirement of common stock . Preferred dividends ($1.34 per common share equivalent) . . . . . . . . . . . . . . . . . . . Cash dividends paid on common stock ($1.34 per share) . . . . . . . . . . . . . . . . . . . Balance at December 31, 2015 . . . . . . . . . Net income . . . . . . . . . . . . . . . . . . . . . . . . . Other comprehensive loss . . . . . . . . . . . . . . Issuance of common stock - stock option and other plans. . . . . . . . . . . . . . . Issuance of common stock - restricted stock awards, net of canceled awards . . . Activity in deferred compensation plan . . . Tax benefit associated with share-based compensation . . . . . . . . . . . . . . . . . . . . . Purchase and retirement of common stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preferred dividends ($1.53 per common share equivalent) . . . . . . . . . . . . . . . . . . . Cash dividends paid on common stock ($1.53 per share) . . . . . . . . . . . . . . . . . . . Balance at December 31, 2016 . . . . . . . . . Adjustment to opening retained earnings pursuant to adoption of ASU 2016-09 . . Adjustment pursuant to adoption of ASU 2018-02 . . . . . . . . . . . . . . . . . . . . . . . . . . Net income . . . . . . . . . . . . . . . . . . . . . . . . . Other comprehensive income . . . . . . . . . . . Issuance of common stock - acquisition related . . . . . . . . . . . . . . . . . . . . . . . . . . . Issuance of common stock - stock option and other plans. . . . . . . . . . . . . . . Issuance of common stock - restricted stock awards, net of canceled awards . . . Preferred stock conversion to common stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . Activity in deferred compensation plan . . . Purchase and retirement of common stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cash settlement of acquired equity awards . . . . . . . . . . . . . . . . . . . . . . . . . . . Cash dividends paid on common stock ($0.88 per share) . . . . . . . . . . . . . . . . . . . 9 — — — — — — — 9 — — — — — — — — — 9 — — — — — — — (9) — — — — (in thousands, except per share amounts) $ 2,217 57,437 $ 985,839 $ 234,498 $ 5,621 $ 1,228,175 — — — — — — — — — 49 270 (32) — — — — 1,258 4,090 (906) — — 98,827 — — — — (137) (77,263) — (11,916) 98,827 (11,916) — — — — — 1,258 4,090 (906) (137) (77,263) $ 2,217 57,724 $ 990,281 $ 255,925 $ (6,295) $ 1,242,128 — — — — — — — — — — — 50 306 — — — — 1,349 5,009 (11) 334 (38) (1,125) 104,866 — — — — — — — — — — (157) (88,677) — (12,704) 104,866 (12,704) — — — — — — — 1,349 5,009 (11) 334 (1,125) (157) (88,677) $ 2,217 58,042 $ 995,837 $ 271,957 $ (18,999) $ 1,251,012 — — — — — — — (2,217) — — — — — 184 (117) — — — 4,082 112,828 — — — — — — — — (7,345) — (51,308) 14,642 636,385 49 241 102 — 1,980 7,745 2,217 1 (56) (2,299) — — — — — — — (4,082) — 856 — — — — — — — — 67 — 112,828 856 636,385 1,980 7,745 — 1 (2,299) (7,345) (51,308) Balance at December 31, 2017 . . . . . . . . . — $ 73,020 $ 1,634,705 $ 337,442 $ (22,225) $ 1,949,922 See accompanying Notes to Consolidated Financial Statements. 59 COLUMBIA BANKING SYSTEM, INC. CONSOLIDATEDAA STATTT EMENTS OF CASH FLOWS Years Ended December 31, 2017 2016 2015 (in thousands) Cash Flows From Operating Activities Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 112,828 $ 104,866 $ 98,827 Adjustments to reconcile net income to net cash provided by operating activities Provision for loan and lease losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stock-based compensation expense. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Depreciation, amortization and accretion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Investment securities loss (gain), net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net realized loss (gain) on sale of premises and equipment, loans held for investment and other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net realized loss (gain) on sale and valuation adjustments of other real estate owned . . . . . . . . . . Gain on sale of merchant card services portfolio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gain on bank owned life insurance death benefit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8,631 7,745 31,101 11 (139) 495 ) ) Termination of FDIC loss share agreements charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,409 10,778 5,009 34,542 (1,181) 157 629 — — — Originations of loans held for sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (133,460) (110,467) Proceeds from sales of loans held for sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Deferred income tax expense. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133,540 22,431 Net change in: Interest receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (2,980) Interest payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (25,471) Other liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ) Net cash provided by operating activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128,525 109,130 1,846 (2,197) (93) (15,917) 8,745 145,847 8,591 4,090 30,312 (1,581) 573 (2,152) — — — (75,689) 72,296 6,367 (75) (142) (5,419) (1,242) 134,756 Cash Flows From Investing Activities Loans originated and acquired, net of principal collected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (273,927) (402,146) (384,321) Purchases of: Securities available for sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (355,607) (569,825) (467,631) Premises and equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Federal Home Loan Bank Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Proceeds from: FDIC reimbursement on loss-sharing asset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sales of securities available for sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Principal repayments and maturities of securities available for sale . . . . . . . . . . . . . . . . . . . . . . . . Sales of premises and equipment and loans held for investment. . . . . . . . . . . . . . . . . . . . . . . . . . . Sale of merchant card services portfolio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Redemption of Federal Home Loan Bank Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sales of other real estate and other personal property owned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bank owned life insurance death benefit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Payment to FDIC to terminate loss-sharing agreements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Payments to FDIC related to loss-sharing asset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net cash received in business combinations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (6,495) (92,040) 26 30,403 283,874 12,422 14,000 2,590 10,745 ) (210) 80,472 (4,520) (59,599) 927 124,142 284,218 9,643 — 62,081 8,158 — — (1,632) — (7,581) (16,760) 4,659 95,375 283,206 15,074 — 37,403 19,387 — — (1,865) — Net cash used in investing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ) (548,553) (423,054) 60 (1,010) (137) (77,263) (8,248) — (906) — 275,430 (12,868) 188,170 COLUMBIA BANKING SYSTEM, INC. CONSOLIDATEDAA STATTT EMENTS OF CASH FLOWS, CONTINUED Years Ended December 31, 2017 2016 2015 (in thousands) Cash Flows From Financing Activities Net increase in deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net decrease in repurchase agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353,797 (3,380) 620,785 (18,877) 514,107 (5,381) Proceeds from: Exercise of stock options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,980 1,349 1,258 Federal Home Loan Bank advances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,301,000 1,392,000 1,702,000 Federal Reserve Bank borrowings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Payments for: Repayment of Federal Home Loan Bank advances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Repayment of Federal Reserve Bank borrowings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preferred stock dividends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 ) ) — 10 1,010 (1,454,000) (1,850,000) (10) (157) Common stock dividends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (51,308) (88,677) Repayment of junior subordinated debentures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cash settlement of acquired equity awards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Purchase and retirement of common stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Excess tax benefit from stock-based compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net cash provided by financing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Increase (decrease) in cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cash and cash equivalents at beginning of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (6,186) (7,345) (2,299) — 189,259 118,295 224,238 — — (1,125) 344 451,642 48,936 175,302 Cash and cash equivalents at end of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 342,533 $ 224,238 $ 175,302 Supplemental Information: Cash paid during the year for: Cash paid for interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cash paid for income tax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Non-cash investing and financing activities Loans transferred to other real estate owned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Share-based consideration issued in business combinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ $ $ 6,626 59,071 106 636,385 $ $ $ $ 4,444 32,723 1,047 $ $ $ — $ 4,146 30,522 8,688 — See accompanying Notes to Consolidated Financial Statements. 61 COLUMBIA BANKING SYSTEM, INC. NOTES TO CONSOLIDATEDAA FINANCIAL STATTT EMENTS For the Years Ended December 31, 2017, 2016 and 2015 1. Summary of Significant Accounting Policies and Recent Developments Organization r Columbia Banking System, Inc. (the “Corporation,” “we,” “our,” “Columbia” or the “Company”) is the holding company for Columbia State Bank (“Columbia Bank” or the “Bank”) and Columbia Trust provides a full range of financial services through 155 branch locations, including 75 in the State of Washington, 66 in Oregon provides fiduciary,yy agency,yy trust and related services, and life insurance products. Because the and 14 in Idaho. Columbia Trust Bank comprises substantially all of the business of the Corporation, references to the “Company” mean the Corporation, the Bank and Columbia Trust together. The Corporation is approved as a bank holding company pursuant to the Gramm-Leach- Bliley Act of 1999. Company (“Columbia Trust”). The Bank rr rr rr r The Company’s accounting and reporting policies conform to accounting principles generally accepted in the United States of America (“GAAP”) and practices in the financial services industry. To prepare the financial statements in conformity with GAAP,PP management must make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements, and income and expenses during the reporting period. Circumstances and events that differ significantly from those underlying our estimates and assumptions could cause actual financial results to differ estimates. The most significant estimates included in the financial statements relate to the allowance for loan and lease losses, business combinations and goodwill impairment. ff from our ff ff The Company has applied its accounting policies and estimation methods consistently in all periods presented in these financial statements (to the periods in which they applied). Recent Developments In July 2017, we entered into an asset purchase agreement (the “Agreement”) with a third-party pursuant to which we sold our merchant card services portfolio. In addition, we transitioned our delivery of those services from in-house to an outsourced model. The carrying amount of both assets and liabilities subject to the Agreement was zero. As a result, in the current year, we recorded a $14.0 million gain on sale of the merchant card services portfolio. Under the new business model, we share with the buyer in net merchant services revenue and no longer directly incur merchant processing expenses. Our net revenue share from merchant services is presented in “Card Revenue” in the Consolidated Statements of Income. For the year ended December 31, 2017, that net revenue share was $1.1 million. rr Correction of Immaterial Errorrr Related to Prior Periods In December 2017, the Company recorded a $1.8 million adjustment, of which approximately $700 thousand related to prior periods, to correct an error in the measure of purchase premium amortization on adjustable rate mortgage-backed securities as calculated by a third-party provider. The adjustment reduced interest income from taxable securities and corrected securities. Based upon an evaluation of all relevant factors, management believes the correcting the amortized cost of affected adjustment did not have a material impact on the Company’s current or previously reported results. ff Consolidation The Consolidated Financial Statements of the Company include the accounts of the Corporation and its subsidiaries, including the Bank and Columbia Trust. rr Intercompany balances and transactions have been eliminated in consolidation. Cash and cash equivalents Cash and cash equivalents include cash and due from banks, and interest-bearing balances due from correspondent banks and the Federal Reserve Bank. Cash equivalents have a maturity of 90 days or less at the time of purchase. 62 Securities Securities are classified based on management’s intention on the date of purchase. All securities are classified as available for sale and are presented at fair value. Unrealized gains or losses on securities available for sale are excluded from net income but are included as separate components of other comprehensive income, net of taxes. Purchase premiums or discounts on securities available for sale are amortized or accreted into income using the interest method over the terms of the individual securities. The Company performs a quarterly assessment to determine whether a decline in fair value below amortized cost is other-than-temporary. Amortized cost includes adjustments made to the cost of an investment for accretion, amortization, collection of cash and previous other-than temporary impairment recognized in earnings. Other-than-temporary impairment exists when it is probable that the Company will be unable to recover the entire amortized cost basis of the security. In performing the quarterly assessment for debt securities, management considers whether or not the Company expects to recover the entire amortized cost basis of the security. In addition, management also considers whether it is more likely than not that it will not have to sell the security before recovery of its cost basis. If the Company intends to sell a security or it is more likely than not it will be required to sell a security prior to recovery of its cost basis, the entire amount of impairment is recognized in earnings. If the Company does not intend to sell the security or it is not more likely than not it will be required to sell the security prior to recovery of its cost basis, the credit loss component of impairment is recognized in earnings and impairment associated with non-credit factors, such as market liquidity,yy is recognized in “Other comprehensive income (loss), between the cost basis of the security and the present value of cash flows expected to net of tax”. A credit loss is the difference ff be collected, discounted at the security’s effective temporarily impaired security is written down by the amount of impairment recognized in earnings. The new cost basis is not adjusted for subsequent recoveries in fair value. However, the difference flows expected to be collected is accreted as interest income. The total other-than-temporary impairment, if any,yy is presented in the Consolidated Statements of Income with a reduction for the amount of other-than-temporary impairment that is recognized in “Other Comprehensive Income,” if any. interest rate at the date of acquisition. The cost basis of an other-than- between the new amortized cost basis and the cash ff ff Realized gains or losses on sales of securities available for sale are recorded using the specific identification method. Federal Home Loan Bank Stock The Company holds shares of Class B stock issued by the Federal Home Loan Bank of Des Moines (the “FHLB”), which has been designated as FHLB membership stock or FHLB activity based stock in accordance with the capital plan of the FHLB. Membership stock is stock we are required to purchase and hold as a condition of membership in the FHLB. The Company’s membership stock purchase requirement is measured as a percentage of our year-end assets, subject to a $10 million cap. Activity based stock is stock we are required to purchase and hold in order to obtain an advance or participate in FHLB mortgage programs. Class B stock may be redeemed, subject to certain limitations, on five years’ written notice to the FHLB. Our FHLB stock is carried at par value because the shares are issued, transferred, redeemed, and repurchased by the FHLB at a par value of $100. The FHLB stock is subject to recoverability testing per the Financial Services-Depository and Lending topic of the FASB Accounting Standards Codification (“ASC”). Loans Loans, excluding purchased credit impaired loans, are generally carried at the unpaid principal balance, net of purchase premiums, purchase discounts and net deferred loan fees. Net deferred loan fees include nonrefundable loan origination fees less direct loan origination costs. Net deferred loan fees, purchase premiums and purchase discounts are amortized into interest income using either the interest method or straight-line method over the terms of the loans, adjusted for actual prepayments. The interest method is used for all loans except revolving loans, for which the straight-line method is used. Interest income is accrued as earned. Fees related to lending activities other than the origination or purchase of loans are recognized as noninterest income during the period the related services are performed. Nonaccrual loans—Loans are placed on nonaccrual status when a loan becomes contractually past due 90 days with respect to interest or principal unless the loan is both well secured and in the process of collection, or if full collection of interest or principal becomes uncertain. When a loan is placed on nonaccrual status, any accrued and unpaid interest receivable is reversed and the amortization of net deferred loan fees, premiums and discounts ceases. The interest payments received on nonaccrual loans are generally accounted for on the cost-recovery method whereby the interest payment is applied to the principal balances. Loans may be returned to accrual status when improvements in credit quality eliminate the doubt as to the full collectability of both interest and principal and a period of sustained performance has occurred. 63 Impairedrr loans—Loans are considered impaired when based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement or when a loan has been modified in a troubled debt restructuring. The assessment for impairment occurs when and while such loans are designated as classified per the Company’s internal risk rating system or when and while such loans are on nonaccrual. All nonaccrual loans greater than $500,000 and all troubled debt restructured loans are considered impaired and analyzed individually on a quarterly basis. Classified loans with an outstanding balance greater than $500,000 are evaluated for potential impairment on a quarterly basis. ff Restructuredrr Loans—A loan is classified as a troubled debt restructuring when a borrower is experiencing financial that lead to a restructuring of the loan, and the Company grants concessions to the borrower in the restructuring that difficulties it would not otherwise consider. These concessions may include interest rate reductions, principal forgiveness, extension of maturity date and other actions intended to minimize potential losses. Generally,yy a nonaccrual loan that is restructured remains on nonaccrual status for a period of six months to demonstrate that the borrower can meet the restructured terms. If the borrower’s performance under the new terms is not reasonably assured, the loan remains classified as a nonaccrual loan. Purchased rr rr Credit Impairedrr Loans (“PCI Loans”)—Loans acquired with evidence of credit deterioration since origination for which it is probable that all contractually required payments will not be collected are accounted for under ASC 310-30, Loans and Debt Securities Acquiredrr with Deteriorated Credit associated with certain of the acquired loan portfolios, the Company elected to account for those certain acquired loans under ASC 310-30. Quality. In addition, because of the significant discounts rr In situations where such loans have similar risk characteristics, loans are aggregated into pools to estimate cash flows. A pool is accounted for as a single asset with a single interest rate, cumulative loss rate and cash flow expectation. Expected cash flows at the acquisition date in excess of the fair value of loans are considered to be accretable yield, which is recognized as interest income over the life of the loan pool using a level yield method if the timing and amount of the future cash flows of the pool is reasonably estimable. Subsequent to the acquisition date, any increases in cash flow over those expected at purchase date in excess of fair value are recorded as interest income prospectively. Any subsequent decreases in cash flow over those expected at purchase date due to credit deterioration are recognized by recording an allowance for losses on purchased credit impaired loans. Any disposals of loans, including sales of loans, payments in full or foreclosures result in the removal of the loan from the loan pool at the carrying amount. Unfunded loan commitments—Unfunded commitments are generally related to providing credit facilities to clients of the Bank and are not actively traded financial instruments. These unfunded commitments are disclosed as financial instruments with off-balance sheet risk in Note 18 in the Notes to Consolidated Financial Statements. ff Allowance for Loan and Lease Losses The allowance for loan and lease losses (the “allowance”) is an accounting estimate of incurred credit losses in our loan portfolio at the balance sheet date. The provision for loan and lease losses is the expense recognized in the Consolidated Statements of Income to adjust the allowance to the levels deemed appropriate by management, as measured by the Company’s credit loss estimation methodologies. Loans Collectively Evaluated for Impairment—This measure of estimated credit losses is based upon the loss experience over a historical base period adjusted for a loss emergence period. The loss emergence period is an estimate of the period that it takes, on average, for us to identify the amount of loss incurred for a loan that has suffered then considers the effects portfolio: of the following qualitative factors to ensure our allowance reflects the inherent losses in the loan a loss-causing event. Management ff ff tt • Economic and business conditions; • Concentration of credit; • Lending management and staff;ff • Lending policies and procedures; • Loss and recovery trends; • Nature and volume of the portfolio; • Trends T • Quality of internal loan review; and • External factors. in problem loans, loan delinquencies and nonaccrual loans; These qualitative factors have a high degree of subjectivity and changes in any of the factors could have a significant impact on our calculation of the allowance. The qualitative adjustment by loan segment is based upon management's assessment of inherent losses within a range between the weighted historical loss factor by segment and the maximum consecutive quarterly losses in the relevant loss emergence period by segment over the historical base period. 64 Loan and lease losses are charged against the allowance when management believes the collectability of a loan balance is unlikely. Subsequent recoveries, if any,yy are credited to the allowance. Loans Individually Evaluated for Impairment—This tt measure of estimated credit losses begins if, based upon current information and events, we believe it is probable that we will be unable to collect all amounts due according to the contractual terms of the loan agreement or when a loan has been modified in a troubled debt restructuring. When a loan has been identified as impaired, the amount of impairment will be measured using discounted cash flows, except when it is determined that the remaining source of repayment for the loan is the operation or liquidation of the underlying collateral. In these cases, the current fair value of the collateral, reduced by costs to sell, will be used in place of discounted cash flows. As a final alternative, the observable market price of the debt may be used to assess impairment. Predominantly,yy the Company uses the fair value of collateral approach based upon a reliable valuation. When the measurement of the impaired loan is less than the recorded amount of the loan, an impairment is recognized by recording a charge-offff to the allowance or by designating a specific reserve. Purchased rr rr Credit Impairedrr Loans—The Company updates its cash flow projections for purchased credit impaired loans accounted for under ASC 310-30 on a quarterly basis. Assumptions utilized in this process include projections related to probability of default, loss severity,yy prepayment and recovery lag. Projections related to probability of default and prepayment are calculated utilizing a loan migration analysis. The loan migration analysis is a matrix of probability that is used to estimate the probability of a loan pool transitioning into a particular delinquency state given its delinquency state at the re-measurement date. Loss severity factors are based upon either actual charge-offff data within the loan pools or industry averages, and recovery lags are based upon the collateral within the loan pools. Any decreases in expected cash flows after the acquisition date and subsequent measurement periods are recognized by recording a provision for loan losses. See “Purchased Credit Impaired Loans” for further discussion. tt Unfunded Commitments and Letters of Credit rr —The allowance for unfunded commitments is maintained at a level ff believed by management to be sufficient determination of the adequacy of the allowance is based on periodic evaluations of the unfunded credit facilities including an assessment of the probability of commitment usage, credit risk factors for loans outstanding to these same customers, and the terms and expiration dates of the unfunded credit facilities. The allowance for unfunded commitments is included in “Other liabilities” on the Consolidated Balance Sheets, with changes to the balance charged against noninterest expense. to absorb estimated probable losses related to these unfunded credit facilities. The Premises rr and Equipment Land, buildings, leasehold improvements and equipment are stated at cost less accumulated depreciation and amortization. Gains or losses on dispositions are reflected in current operations. Expenditures for improvements and major renewals are capitalized, and ordinary maintenance, repairs and small purchases are charged to “Occupancy” in the Consolidated Statements of Income. Depreciation and amortization are computed based on the straight-line method over the estimated useful lives of the various classes of assets. The ranges of useful lives for the principal classes of assets are as follows: Buildings and building improvements . . . . . . . . . . . . . . . . . Leasehold improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . Term of lease or useful life, whichever is shorter Furniture, fixtures and equipment . . . . . . . . . . . . . . . . . . . . . 3 to 7 years Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 years Computer software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 to 5 years to 39 years Softwarerr Capitalized software is stated at cost, less accumulated amortization. Amortization is computed on a straight-line basis and charged to expense over the estimated useful life of the software, which is generally three years. Capitalized software is included in “Premises and equipment, net” in the Consolidated Balance Sheets. 65 Other Real Estate Owned Other real estate owned (“OREO”) is composed of real estate acquired by the Company through either foreclosure or deed in lieu of foreclosure in satisfaction of debt. At acquisition, OREO is recorded at fair value less estimated costs to sell. Any fair value adjustments at acquisition are charged to the allowance, or in the event of a write-up without previous losses charged to the allowance, a credit to earnings is recorded. The fair value of the OREO is based upon current appraisal. Losses that result from the ongoing periodic valuation of these properties are charged to the net cost of operation of OREO in the period in which they are identified. Improvements to the OREO are capitalized and holding costs are charged to the net cost of operation of OREO as incurred. Goodwill and Intangibles Net assets of companies acquired in a business combination are recorded at fair value at the date of acquisition. Any excess of the purchase price over the fair value of net assets acquired, including identified intangible assets, is recognized as goodwill. Goodwill is reviewed for potential impairment annually,yy during the third quarter, or, more frequently,yy if events or circumstances indicate a potential impairment, at the reporting unit level. A reporting unit is an operating segment or one level below an operating segment for which discrete financial information is available and regularly reviewed by management. The Company consists of a single reporting unit. If the fair value of the reporting unit, including goodwill, is determined to be less than the carrying amount of the reporting unit, a further test is required to measure the amount of impairment. If an impairment loss exists, the carrying amount of goodwill is adjusted to a new cost basis. Subsequent reversal of a previously recognized goodwill impairment loss is prohibited. Identified intangible assets are amortized on an accelerated basis over the period benefited. Intangible assets are also evaluated for impairment if events and circumstances indicate a possible impairment. Such evaluation is based on undiscounted cash flow projections. At December 31, 2017, intangible assets included in the Consolidated Balance Sheets principally consisted of core deposit intangibles with an original estimated life of 10 years. Income Taxesaa ff such as interest income from state and municipal securities and investments in affordable between the financial reporting and tax reporting basis of assets and liabilities using enacted tax laws and rates. The The provision for income taxes includes current and deferred income tax expense on net income adjusted for temporary and permanent differences housing tax credits. Deferred tax assets and liabilities are recognized for the expected future tax consequences of existing temporary differences ff on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the ff effect enactment date. On a quarterly basis, management evaluates deferred tax assets to determine if these tax benefits are expected to be realized in future periods. This determination is based on facts and circumstances, including the Company’s current and future tax outlook. To the extent a deferred tax asset is no longer considered “more likely than not” to be realized, a valuation allowance is established. ff We recognize the tax benefit from uncertain tax positions only if it is more likely than not that the tax positions will be sustained on examination by the tax authorities, based on the technical merits of the position. The tax benefit is measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. We recognize interest and penalties related to unrecognized tax benefits in “Provision for income taxes” in the Consolidated Statements of Income. Advertising Advertising costs are generally expensed as incurred. Earnings per Common Sharerr The Company’s capital structure includes common shares, restricted common share awards, common share options, and, during 2015, 2016 and a portion of 2017, convertible preferred shares. Restricted common share awards participate in dividends declared on common shares at the same rate as common shares. Convertible preferred shares participated in dividends declared on common shares on an “as if converted” basis. Restricted common share awards and convertible preferred shares are considered participating securities under the Earnings per Share topic of the FASB ASC. 66 The Company calculates earnings per common share (“EPS”) using the two-class method. The two-class method is an earnings allocation formula that treats a participating security as having rights to earnings that otherwise would have been available to common shareholders but does not require the presentation of basic and diluted EPS for securities other than common shares. Under the two-class method, basic EPS is computed by dividing earnings allocated to common shareholders by the weighted average number of common shares outstanding for the period. Earnings allocated to common shareholders represents net income reduced by earnings allocated to participating securities. Diluted EPS is computed in the same manner as basic earnings per share except that the denominator is increased to include the number of additional common shares that would have been outstanding if certain shares issuable upon exercise of common share options were included unless those additional shares would have been anti-dilutive. For the diluted EPS computation, the treasury stock method is applied and compared to the two-class method and whichever method results in a more dilutive impact is utilized to calculate diluted EPS. Share-Based rr Payment The Company accounts for stock options and stock awards in accordance with the Compensation—Stock Compensation topic of the FASB ASC. Authoritative guidance requires the Company to measure the cost of employee services received in exchange for an award of equity instruments, such as stock options or stock awards, based on the fair value of the award on the grant date. This cost must be recognized in the Consolidated Statements of Income over the vesting period of the award. The Company issues restricted common share awards which generally vest over a four or five-year period during which time the holder receives dividends and has full voting rights. Restricted stock is valued at the closing price of the Company’s stock on the date of an award. Derivatives and Hedging Activities In accordance with the Derivatives and Hedging topic of the FASB ASC, the Company recognizes derivatives as assets or liabilities on the Consolidated Balance Sheets at their fair value. The Company periodically enters into interest rate contracts with customers and offsetting contracts with third parties. As these interest rate contracts are not designated as hedges under the Derivatives and Hedging topic of the FASB ASC, the changes in fair value of these instruments are recognized immediately in earnings. ff rr Accounting Pronouncements Recently Issued In February 2018, the Financial Accounting Standards Board (“FASB”) FF issued Accounting Standards Update (“ASU”) Accumulated Other Comprehensive 2018-02, Reclassification of Certain Taxaa Effects fromrr ASU allow a reclassification from accumulated other comprehensive income (“AOCI”) to retained earnings for stranded tax effects in AOCI resulting from the newly enacted corporate tax rate in the Tax Cuts and Jobs Act. The amendments in ASU ff 2018-02 are effective for fiscal years beginning after December 15, 2018 and interim periods within those years and early adoption is permitted for public business entities in a period for which financial statements have not yet been issued. The Company adopted the amendments of ASU 2018-02 effective the portfolio approach, deferred taxes recorded in AOCI of $4.1 million to retained earnings. December 31, 2017. An election was made to reclassify,yy using Income. The amendments in this rr ff ff In May 2017, the FASB issued ASU 2017-09, Scope of Modification Accounting. The amendments in this ASU provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. The amendments in ASU 2017-09 are effective annual periods, beginning after December 15, 2017. Early adoption is permitted. The adoption of ASU 2017-09 is not expected to have a material impact on the Company’s consolidated financial statements. for annual periods, and interim periods within those ff In March 2017, the FASB issued ASU 2017-08, Premium rr Amortization on Purchased rr Callable Debt Securities. The amendments included in this ASU change guidance on the amortization period of premiums on certain purchased callable debt securities. Specifically,yy the amendments shorten the premium amortization period to the earliest call date. The amendments in for fiscal years and interim periods within those years, beginning after December 15, 2018. Early ASU 2017-08 are effective adoption is permitted. The Company adopted the amendments of ASU 2017-08 during the first quarter of 2017. The impact of the adoption of ASU 2017-08 to net income and opening retained earnings was not material. ff 67 In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment. The amendments in this are intended to reduce the cost and complexity of the goodwill impairment test by eliminating the second step of the goodwill impairment test. An entity will apply a one-step quantitative test and record the amount of goodwill impairment as the excess of a reporting unit’s carrying amount over its fair value, not to exceed the total amount of goodwill allocated to the reporting unit. The new guidance does not amend the optional qualitative assessment of goodwill impairment. The amendments in ASU 2017-04 are effective for annual or interim periods beginning after December 15, 2019. Early adoption is permitted. The adoption of ASU 2017-04 is not expected to have a material impact on the Company’s consolidated financial statements. ff In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments. The amendments in this ASU provide specific guidance on several statement of cash flow classification issues to reduce diversity in practice. The amendments in ASU 2016-15 are effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted. The Company adopted the amendments of ASU 2016-15 during 2017. The adoption did not have a material impact to prior year Consolidated Financial Statements. ff In June 2016, the FASB issued ASU 2016-13, Measurement Losses on Financial Instruments. The amendments included in this ASU require an entity to reflect its current estimate of all expected credit losses for assets held at an amortized cost basis. For available for sale debt securities, credit losses will be measured in a manner similar to current GAAP,PP however, this ASU will require that credit losses be presented as an allowance rather than as a write-down. The amendments in ASU 2016-13 are effective and are required to be adopted through a modified retrospective approach, with a cumulative-effect earnings as of the beginning of the first reporting period in which the ASU is effective. for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, adjustment to retained rr of Credit rr ff ff ff Currently,yy the Company cannot reasonably estimate the impact that adoption of ASU 2016-13 will have on its Consolidated Financial Statements; however, the impact may be significant. That assessment is based upon the fact that, unlike the incurred loss models in existing GAAP,PP the current expected credit loss (“CECL”) model in ASU 2016-13 does not specify a threshold for the recognition of an impairment allowance. Rather, the Company will recognize an impairment allowance equal to its estimate of lifetime expected credit losses, adjusted for prepayments, for in-scope financial instruments as of the end of the reporting period. Accordingly,yy the impairment allowance measured under the CECL model could increase significantly from the impairment allowance measured under the Company’s existing incurred loss model. Significant CECL implementation matters to be addressed by the Company include selecting loss estimation methodologies, identifying, sourcing and storing data, addressing data gaps, defining a reasonable and supportable forecast period, selecting historical loss information which will be reverted to, documenting the CECL estimation process, assessing the impact to internal controls over financial reporting, capital planning and seeking process approval from audit and regulatory stakeholders. In March 2016, the FASB issued ASU 2016-09, Improvements rr to Employee Share-Based rr Payment Accounting. The amendments included in this ASU simplify several aspects of the accounting for employee share-based payment transactions including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. The Company adopted the amendments of ASU 2016-09 at the beginning of 2017. Adoption of amended forfeiture guidance resulted in an opening period adjustment decreasing retained earnings $117 thousand and increasing common stock $184 thousand. Adoption of the amended excess tax benefit guidance resulted in an income tax benefit of $1.3 million or $0.02 per diluted common share for the year ended December 31, 2017. In February 2016, the FASB issued ASU 2016-02, Leases. The amendments included in this ASU create a new accounting ff from the current lease accounting model, which does not require such lease liabilities and model for both lessees and lessors. The new guidance requires lessees to recognize lease liabilities, initially measured as the present value of future lease payments, and corresponding right-of-use assets for all leases with lease terms greater than 12 months. This model differs corresponding right-of-use assets to be recorded for operating leases. The amendments in ASU 2016-02 must be adopted using the modified retrospective approach and will be effective 2018. Early adoption is permitted. During 2017, the Company selected a third-party lease accounting application to assist in the implementation of this new guidance. Significant implementation matters to be addressed by the Company include assessing the impact to our internal controls over financial reporting and documenting the new lease accounting process. The Company is assessing the impact that this guidance will have on its Consolidated Financial Statements. See Note 18, “Commitments and Contingent Liabilities,” for more information regarding the minimum future payments related to our operating leases. for the first interim or annual period beginning after December 15, ff 68 In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement rr of Financial Assets and Financial Liabilities. The amendments in ASU 2016-01 require all equity investments to be measured at fair value with changes in the fair value recognized through net income. The amendments in ASU 2016-01 also require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument- specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. In addition, the amendments in this update eliminate the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet for public business entities. The amendments in ASU 2016-01 are effective for the first interim or annual period beginning after December 15, 2017. The Company has assessed the impact that this guidance will have on its consolidated financial statements and determined that the impact will not be material. The change in fair value of equity securities recognized in other comprehensive income was $3 thousand, $33 thousand and $64 thousand for the years ended December 31, 2017, 2016 and 2015, respectively. ff In May 2014, the FASB issued ASU 2014-09, Revenue fromrr Contracts with Customers. The guidance in this update will for interim and annual periods beginning after December 15, 2016. However, in August 2015, the FASB issued replace most existing revenue recognition guidance in GAAP when it becomes effective. ff to be effective ASU 2015-14, which delayed the effective new standard as of the original effective ASU 2017-13 to provide implementation guidance and practical expedients related to ASU 2014-09. The Company’s revenue is comprised of interest income on financial assets, which is excluded from the scope of this new guidance, and non-interest income. The adoption of ASU 2017-04 is not expected to have a material impact on the Company’s consolidated financial statements. date of ASU 2014-09 by one year and permits companies to voluntarily adopt the date. The FASB subsequently issued ASU 2016-08, ASU 2016-10, ASU 2016-12 and For public companies, this update was ff ff ff 2. Business Combinations Pacific Continental Corporation On November 1, 2017, the Company completed its acquisition of Pacific Continental Corporation (“Pacific Continental”) and its wholly-owned banking subsidiary Pacific Continental Bank. The Company acquired 100% of the equity interests of Pacific Continental. The primary reasons for the acquisition were to expand in the Eugene, Oregon market and improve branch ff network efficiencies in the Seattle and Portland markets. The assets acquired and liabilities assumed have been accounted for under the acquisition method of accounting. The assets and liabilities, both tangible and intangible, were recorded at their fair values as of the November 1, 2017 acquisition date. Initial accounting for deferred taxes was incomplete as of December 31, 2017. The deferred taxes currently recognized in the financial statements have been determined provisionally as the final Pacific Continental tax return has not yet been completed. The application of the acquisition method of accounting resulted in the recognition of goodwill of $383.1 million and a core deposit intangible of $46.9 million, or 2.34% of core deposits. The goodwill represents the excess purchase price over the fair value of the net assets acquired. The goodwill is not deductible for income tax purposes. 69 The table below summarizes the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed: Merger consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Identifiable net assets acquired, at fair value Assets acquired Cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Investment Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Federal Home Loan Bank stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Premises and equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other real estate owned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Core deposit intangible. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total assets acquired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Liabilities assumed Deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Federal Home Loan Bank advances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Subordinated debentures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Junior subordinated debentures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Securities sold under agreements to repurchase. . . . . . . . . . . . . . . . . . . . . . . . . . . . Other liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total liabilities assumed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total fair value of identifiable net assets, at fair value Goodwill. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . November 1, 2017 (in thousands) $ 637,103 $ 81,190 449,291 7,084 7,827 27,343 10,279 46,875 50,638 (2,118,982) (101,127) (35,678) (14,434) (1,617) (28,653) 2,554,514 (2,300,491) 254,023 383,080 See Note 10, “Goodwill and Other Intangible Assets,” for further discussion of the accounting for goodwill and other intangible assets. The operating results of the Company reported herein include the operating results produced by the acquired assets and assumed liabilities for the period November 1, 2017 to December 31, 2017. Disclosure of the amount of Pacific Continental’s revenue and net income (excluding integration costs) included in Columbia’s Consolidated Statements of Income is impracticable due to the integration of the operations and accounting for this acquisition. 70 For illustrative purposes only,yy the following table presents certain unaudited pro forma information for the years ended December 31, 2017 and 2016. This unaudited estimated pro forma financial information was calculated as if Pacific Continental had been acquired as of the beginning of the year prior to the date of acquisition. This unaudited pro forma information combines the historical results of Pacific Continental with the Company’s consolidated historical results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the respective periods. The pro forma information is not indicative of what would have occurred had the acquisition occurred as of the beginning of the year prior to the acquisition. In particular, no adjustments have been made to eliminate the impact of other-than-temporary impairment losses and losses recognized on the sale of securities that may not have been necessary had the investment securities been recorded at fair value as of the beginning of the year prior to the date of acquisition. The unaudited pro forma information does not consider any changes to the provision for credit losses resulting from recording loan assets at fair value. Additionally,yy Columbia expects to achieve further operating cost savings and other business synergies, including revenue growth as a result of the acquisition, which are not reflected in the pro forma amounts that follow. As a result, actual amounts would have differed from the unaudited pro forma information presented. ff Unaudited Pro Forma Years Ended December 31, 2017 2016 (in thousands except per share) Total revenues (net interest income plus noninterest income) . . . . . . . . . . . . . . . . . . . . . . Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Earnings per share - basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Earnings per share - diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ $ $ 571,944 149,859 2.23 2.23 $ $ $ $ 520,419 124,550 1.86 1.86 The following table shows the impact of the acquisition-related expenses related to the acquisition of Pacific Continental for the periods indicated to the various components of noninterest expense: Year ended December 31, 2017 2016 (in thousands) Noninterest Expense Compensation and employee benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Occupancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Advertising and promotion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Data processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Legal and professional fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Taxes, licenses and fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total impact of acquisition-related costs to noninterest expense . . . . . . . . . . . . . . . . . . . $ $ 8,014 1,912 467 4,618 10 620 $ 17,196 $ — — — — 291 — — 291 As a result of the acquisition of Pacific Continental, we have consolidated assets exceeding $10 billion and we will be subject to the interchange fee cap beginning July 1, 2018. We currently anticipate a pre-tax annual impact of approximately $10 million because we will no longer qualify for the small issuer exemption. 3. Cash and Cash Equivalents The Company is required to maintain an average reserve balance with the Federal Reserve Bank or maintain such reserve balance in the form of cash. The average required reserve balance for the years ended December 31, 2017 and 2016 was approximately $76.5 million and $62.8 million, respectively,yy and was met by holding cash and maintaining an average balance with the Federal Reserve Bank. 71 4. Securities At December 31, 2017 the Company’s securities portfolio primarily consisted of securities issued by the U.S. government, U.S. government agencies, U.S. government-sponsored enterprises and state and municipalities. All of the Company’s mortgage-backed securities and collateralized mortgage obligations are issued by U.S. government agencies and U.S. government-sponsored enterprises and are implicitly guaranteed by the U.S. government. The Company had no other issuances in its portfolio which exceeded ten percent of shareholders’ equity. The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of securities available for sale: December 31, 2017 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . State and municipal securities . . . . . . . . . . . . . . . . . . . . . . . . . U.S. government agency and government-sponsored enterprise securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . U.S. government securities. . . . . . . . . . . . . . . . . . . . . . . . . . . . Other securities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . December 31, 2016 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . State and municipal securities . . . . . . . . . . . . . . . . . . . . . . . . . U.S. government agency and government-sponsored enterprise securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . U.S. government securities. . . . . . . . . . . . . . . . . . . . . . . . . . . . Other securities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) $ 1,752,236 $ 593,940 416,894 251 5,284 1,815 6,023 642 — 84 $ (27,326) $ 1,726,725 (3,959) 596,004 (2,762) (3) (288) 414,774 248 5,080 $ 2,768,605 $ 8,564 $ (34,338) $ 2,742,831 $ 1,486,690 $ 473,914 332,348 801 5,284 2,760 6,343 1,065 — 63 $ (23,718) $ 1,465,732 (5,197) 475,060 (1,511) 331,902 (1) (264) 800 5,083 $ 2,299,037 $ 10,231 $ (30,691) $ 2,278,577 The following table provides the proceeds and gross realized gains and losses on the sales and calls of securities for the periods indicated: Proceeds from sales and calls of available for sale securities . . . . . . . . . . . . Gross realized gains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gross realized losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net realized gains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Years Ended December 31, 2017 2016 2015 $ $ $ $ $ 30,403 111 (122) (11) $ (in thousands) 124,142 1,181 — 1,181 $ $ $ 95,375 1,591 (10) 1,581 72 The scheduled contractual maturities of investment securities available for sale at December 31, 2017 are presented as follows: Due within one year . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Due after one year through five years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Due after five years through ten years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Due after ten years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other securities with no stated maturity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total investment securities available-for-sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . December 31, 2017 Amortized Cost Fair Value $ (in thousands) $ 124,885 638,921 804,462 124,763 636,860 796,611 1,195,053 1,179,517 5,284 5,080 $ 2,768,605 $ 2,742,831 The following table summarizes the carrying value of securities pledged as collateral to secure public deposits, borrowings and other purposes as permitted or required by law: Washington and Oregon State to secure public deposits. . . . . . . . . . . . . . . . . . . . . . . . . . . . Federal Reserve Bank to secure borrowings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other securities pledged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total securities pledged as collateral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . December 31, 2017 December 31, 2016 (in thousands) $ 245,222 $ 232,714 52,917 121,244 419,383 $ 33,825 132,350 398,889 The following tables show the gross unrealized losses and fair value of the Company’s investments with unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2017 and 2016: Less than 12 Months 12 Months or More TotalTT Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (in thousands) December 31, 2017 U.S. government agency and government- sponsored enterprise mortgage-backed securities and collateralized mortgage obligations . . . . . . . . . . $ 816,678 $ (6,710) $ 717,211 $ (20,616) $ 1,533,889 (27,326) (3,959) State and municipal securities . . . . . . . . . . . . . . . . . . . . 220,019 (1,723) 75,172 (2,236) 295,191 U.S. government agency and government- sponsored enterprise securities . . . . . . . . . . . . . . . . . (1,006) 155,983 (1,756) 340,029 (2,762) U.S. government securities . . . . . . . . . . . . . . . . . . . . . . Other securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249 — (3) — — 4,982 — (288) 249 4,982 (3) (288) Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 1,220,992 $ (9,442) $ 953,348 $ (24,896) $ 2,174,340 $ (34,338) December 31, 2016 U.S. government agency and government- sponsored enterprise mortgage-backed securities and collateralized mortgage obligations . . . . . . . . . . $ 1,029,116 $ (18,788) $ 159,046 $ (4,930) $ 1,188,162 $ (23,718) State and municipal securities . . . . . . . . . . . . . . . . . . . . 211,342 (5,064) 3,384 (133) 214,726 (5,197) U.S. government agency and government-sponsored enterprise securities . . . . . . . . . . . . . . . . . . . . . . . . . . U.S. government securities . . . . . . . . . . . . . . . . . . . . . . Other securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218,811 (1,511) 251 2,263 (1) (51) — — — — 2,743 (213) 218,811 (1,511) 251 5,006 (1) (264) Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 1,461,783 $ (25,415) $ 165,173 $ (5,276) $ 1,626,956 $ (30,691) 73 At December 31, 2017, there were 396 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations securities in an unrealized loss position, of which 120 were in a continuous loss position for 12 months or more. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not currently intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity,yy the Company does not consider these investments to be other-than-temporarily impaired at December 31, 2017. At December 31, 2017, there were 314 state and municipal government securities in an unrealized loss position, of which 69 were in a continuous loss position for 12 months or more. The unrealized losses on state and municipal securities were caused by interest rate changes or widening of market spreads subsequent to the purchase of the individual securities. Management monitors published credit ratings of these securities for adverse changes. As of December 31, 2017, none of the rated obligations of state and local government entities held by the Company had a below investment grade credit rating. Because the credit quality of these securities is investment grade and the Company does not currently intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity,yy the Company does not consider these investments to be other- than-temporarily impaired at December 31, 2017. At December 31, 2017, there were 44 U.S. government agency and government-sponsored enterprise securities in an unrealized loss position, of which 16 were in a continuous loss position for 12 months or more. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not currently intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity,yy the Company does not consider these investments to be other-than-temporarily impaired at December 31, 2017. At December 31, 2017, there was one U.S. government security in an unrealized loss position, which was not in a continuous loss position for 12 months or more. The decline in fair value is attributable to changes in interest rates relative to where this investment falls within the yield curve and its individual characteristics. Because the Company does not currently intend to sell this security nor does the Company consider it more likely than not that it will be required to sell this security before the recovery of amortized cost basis, which may be upon maturity,yy the Company does not consider this investment to be other-than-temporarily impaired at December 31, 2017. At December 31, 2017, there were two other securities in an unrealized loss position, both were mortgage-backed securities funds and in a continuous unrealized loss position for 12 months or more. The decline in fair value is attributable to changes in interest rates and the additional risk premium investors are demanding for investment securities with these characteristics. The Company does not consider these investments to be other-than-temporarily impaired at December 31, 2017 as it has the intent and ability to hold the investments for sufficient time to allow for recovery in the market value. ff 5. Loans The Company’s loan portfolio includes originated and purchased loans. Originated loans and purchased loans for which there was no evidence of credit deterioration at their acquisition date and it was probable that we would be able to collect all contractually required payments are referred to collectively as loans, excluding purchased credit impaired loans. Purchased loans for which there was, at acquisition date, evidence of credit deterioration since their origination and it was probable that we would be unable to collect all contractually required payments are referred to as purchased credit impaired loans, or “PCI loans.” 74 The following is an analysis of the loan portfolio by segment (net of unearned income): December 31, 2017 December 31, 2016 Loans, excluding PCI loans PCI Loans Total Loans, excluding PCI loans PCI Loans Total (in thousands) Commercial business . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 3,377,324 $ 12,628 $ 3,389,952 $ 2,551,054 $ 20,185 $ 2,571,239 Real estate: One-to-four family residential. . . . . . . . . . . . . . . . . . Commercial and multifamily residential . . . . . . . . . . Total real estate . . . . . . . . . . . . . . . . . . . . . . . Real estate construction: One-to-four family residential. . . . . . . . . . . . . . . . . . Commercial and multifamily residential . . . . . . . . . . Total real estate construction . . . . . . . . . . . . . Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,825,739 4,014,135 371,931 572,449 12,395 75,594 87,989 177 607 784 11,269 200,791 3,901,333 4,102,124 200,695 372,538 573,233 345,459 170,331 2,719,830 2,890,161 121,887 209,118 331,005 329,261 Less: Net unearned income . . . . . . . . . . . . . . . . . . . . (52,111) — (52,111) (33,718) Total loans, net of unearned income. . . . . . . . . . . . . . . . . . 112,670 8,358,657 6,067,763 Less: Allowance for loan and lease losses. . . . . . . . . (68,739) (6,907) (75,646) (59,528) 17,862 89,231 107,093 832 1,565 2,397 15,985 — 145,660 (10,515) 188,193 2,809,061 2,997,254 122,719 210,683 333,402 345,246 (33,718) 6,213,423 (70,043) Total loans, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 8,177,248 Loans held for sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 5,766 $ $ 105,763 $ 8,283,011 — $ 5,766 $ $ 6,008,235 5,846 $ $ 135,145 $ 6,143,380 — $ 5,846 At December 31, 2017 and 2016, the Company had no material foreign activities. Substantially all of the Company’s loans and unfunded commitments are geographically concentrated in its service areas within the states of Washington, Oregon and Idaho. The Company has made loans to executive officers ff and directors of the Company and related interests. These loans are made on the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with unrelated persons and do not involve more than the normal risk of collectability. The aggregate dollar amount of these loans was $10.0 million and $10.1 million at December 31, 2017 and 2016, respectively. During 2017, advances on related party loans totaled $203 thousand and repayments on related party loans totaled $350 thousand. At December 31, 2017 and 2016, $2.25 billion and $2.29 billion of commercial and residential real estate loans were pledged as collateral on Federal Home Loan Bank advances. The Company has also pledged $70.2 million and $54.2 million of commercial loans to the Federal Reserve Bank for additional borrowing capacity at December 31, 2017 and 2016, respectively. Nonaccrual loans totaled $66.2 million and $27.8 million at December 31, 2017 and 2016, respectively. The amount of interest income foregone as a result of these loans being placed on nonaccrual status totaled $2.4 million for 2017, $1.9 million for 2016 and $1.3 million for 2015. There were $581 thousand of loans 90 days past due and still accruing interest as of December 31, 2017 and no loans 90 days past due and still accruing interest as of December 31, 2016. At December 31, 2017 and 2016, there were $2.0 million and $293 thousand, respectively,yy of commitments of additional funds for loans accounted for on a nonaccrual basis. 75 The following is an analysis of nonaccrual loans as of December 31, 2017 and 2016: Commercial business: Secured . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unsecured. . . . . . . . . . . . . . . . . . . . . . . . . . Real estate: One-to-four family residential. . . . . . . . . . . . . . Commercial and multifamily residential: Commercial land . . . . . . . . . . . . . . . . . . . . Income property . . . . . . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . . . . . . Real estate construction: One-to-four family residential: Land and acquisition . . . . . . . . . . . . . . . . . Residential construction . . . . . . . . . . . . . . . Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . December 31, 2017 December 31, 2016 Recorded Investment Nonaccrual Loans Unpaid Principal Balance Nonaccrual Loans Recorded Investment Nonaccrual Loans Unpaid Principal Balance Nonaccrual Loans (in thousands) $ 45,410 $ 56,865 $ 11,524 $ 21,503 50 785 2,628 4,284 7,029 1,829 4,149 49 1,182 2,623 5,410 7,270 26 1,828 4,633 31 568 934 4,005 6,248 14 549 3,883 $ 66,189 $ 79,886 $ 27,756 $ 303 1,302 922 4,247 9,030 102 549 4,331 42,289 76 Loans, excluding purchased credit impaired loans The following is an aging of the recorded investment of the loan portfolio as of December 31, 2017 and 2016: December 31, 2017 Commercial business: Current Loans 30 - 59 Days Past Due 60 - 89 Days Past Due Greater than 90 Days Past Due (in thousands) Total Past Due Nonaccrual Loans Total Loans Secured . . . . . . . . . . . . . . . . . . . $ 3,185,321 $ 2,530 $ 2,400 $ — $ 4,930 $ 45,410 $ 3,235,661 Unsecured . . . . . . . . . . . . . . . . . 100 Real estate: One-to-four family residential . . . . . . 184,256 1,111 Commercial and multifamily residential: Commercial land. . . . . . . . . . . . 292,680 Income property . . . . . . . . . . . . 1,898,655 Owner occupied . . . . . . . . . . . . 1,590,004 Real estate construction: One-to-four family residential: Land and acquisition . . . . . . . . . Residential construction . . . . . . 9,882 187,862 Commercial and multifamily residential: Income property . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . 293,028 72,443 325,928 92 2,426 2,485 — — — — 1,446 501 402 — 971 468 — — — — 702 — — 581 — — — — — — — 601 50 124,175 1,513 785 186,554 673 3,397 2,953 — — — — 2,628 4,284 7,029 25 1,829 — — 2,148 4,149 295,981 1,906,336 1,599,986 9,907 189,691 293,028 72,443 332,225 Total . . . . . . . . . . . . . . . . . . . . . . . . . . $ 8,163,583 $ 10,190 $ 5,444 $ 581 $ 16,215 $ 66,189 $ 8,245,987 Current Loans 30 - 59 Days Past Due 60 - 89 Days Past Due December 31, 2016 Commercial business: Secured . . . . . . . . . . . . . . . . . . . $ 2,439,250 $ Unsecured . . . . . . . . . . . . . . . . . $ 806 287 Real estate: One-to-four family residential . . . . . . 164,416 2,448 Commercial and multifamily residential: Commercial land. . . . . . . . . . . . 269,816 Income property . . . . . . . . . . . . 1,365,150 Owner occupied . . . . . . . . . . . . 1,052,078 Real estate construction: One-to-four family residential: Land and acquisition . . . . . . . . . Residential construction . . . . . . 11,542 109,080 Commercial and multifamily residential: Income property . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . 103,779 103,480 318,369 Total . . . . . . . . . . . . . . . . . . . . . . . . . . $ 6,031,078 $ 64 480 1,652 — — — — 2,035 7,772 Greater than 90 Days Past Due (in thousands) $ — $ — — — — — — — — — — Total Past Due Nonaccrual Loans Total Loans 816 588 $ 11,524 $ 2,451,590 31 94,737 2,948 568 167,932 64 591 1,652 — — — — 2,270 8,929 934 4,005 6,248 14 549 — — 3,883 270,814 1,369,746 1,059,978 11,556 109,629 103,779 103,480 324,522 $ 27,756 $ 6,067,763 10 301 500 — 111 — — — — — 235 $ 1,157 $ — $ 77 The following is an analysis of the impaired loans (see Note 1) as of December 31, 2017 and 2016: Recorded Investment of Loans Collectively Measured for Contingency Provision Recorded Investment of Loans Individually Measured for Specific Impairment Impaired Loans With Recorded Allowance Impaired Loans Without Recorded Allowance Recorded Investment Unpaid Principal Balance (in thousands) Related Allowance Recorded Investment Unpaid Principal Balance December 31, 2017 Commercial business: Secured . . . . . . . . . . . . . . . . . . . . . . . . $ 3,195,649 $ 40,012 $ 3,808 $ 3,937 $ 1,867 $ 36,204 $ 42,314 Unsecured . . . . . . . . . . . . . . . . . . . . . . Real estate: One-to-four family residential . . . . . . . . . . . Commercial and multifamily residential: Commercial land . . . . . . . . . . . . . . . . Income property . . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . . Real estate construction: One-to-four family residential: Land and acquisition. . . . . . . . . . . . . . Residential construction . . . . . . . . . . . Commercial and multifamily residential: Income property . . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . . 124,150 185,659 293,694 9,907 188,481 Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325,210 25 895 2,287 5,023 8,688 — 1,210 — 4,050 7,015 25 24 867 1,408 — 2,768 77 — 3,328 80 — — — — — — — — 5,303 5,568 3 103 — 185 3 — — — — 199 — 28 2,287 2,255 8,611 — 1,210 — 4,050 1,712 — 337 2,282 2,601 10,077 — 1,210 — 4,050 1,864 Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 8,176,782 $ 69,205 $ 12,848 $ 14,345 $ 2,360 $ 56,357 $ 64,735 Recorded Investment of Loans Collectively Measured for Contingency Provision Recorded Investment of Loans Individually Measured for Specific Impairment Impaired Loans With Recorded Allowance Impaired Loans Without Recorded Allowance Recorded Investment Unpaid Principal Balance (in thousands) Related Allowance Recorded Investment Unpaid Principal Balance December 31, 2016 Commercial business: Secured . . . . . . . . . . . . . . . . . . . . . . . . $ 2,442,772 $ 8,818 $ 2,414 $ 2,484 $ Unsecured . . . . . . . . . . . . . . . . . . . . . . Real estate: One-to-four family residential . . . . . . . . . . . Commercial and multifamily residential: Commercial land . . . . . . . . . . . . . . . . Income property . . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . . Real estate construction: One-to-four family residential Land and acquisition. . . . . . . . . . . . . . Residential construction . . . . . . . . . . . Commercial and multifamily residential: Income property . . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . . 94,737 167,403 270,106 11,542 109,293 — 529 708 4,425 5,414 14 336 — — — 435 — 540 — 14 — — — — 693 — 544 — 102 — — — Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319,307 5,215 4,464 4,558 664 — 12 — 27 — 1 — — — 57 $ 6,404 $ 12,831 — 94 708 3,885 5,414 — 336 — — 751 — 291 687 4,148 8,102 — 336 — — 833 Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 6,042,304 $ 25,459 $ 7,867 $ 8,381 $ 761 $ 17,592 $ 27,228 78 The following table provides additional information on impaired loans for the years ended December 31, 2017, 2016 and 2015: Year Ended December 31, 2017 Year Ended December 31, 2016 Year Ended December 31, 2015 Average Recorded Investment Impaired Loans Interest Recognized on Impaired Loans Average Recorded Investment Impaired Loans Interest Recognized on Impaired Loans Average Recorded Investment Impaired Loans Interest Recognized on Impaired Loans Commercial business Secured . . . . . . . . . . $ 20,282 $ Unsecured . . . . . . . . Real estate: One-to-four family residential. . . . . . . . . . . Commercial & multifamily residential Commercial land . . . Income property . . . Owner occupied. . . . Real estate construction: One-to-four family residential Land and acquisition . . . . . . Residential construction. . . . . Commercial & multifamily residential 5 730 2,079 4,314 5,335 3 309 Owner occupied. . . . 1,620 Consumer. . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . $ 40,650 $ 60 — 49 — 51 445 — — 203 163 971 (in thousands) $ 9,368 $ — 743 425 2,492 5,084 199 472 — 2,710 $ 21,493 $ 79 — 10 — 26 — — — — 122 237 $ 7,987 $ — 2,848 94 2,913 7,052 641 648 — 189 $ 22,372 $ 84 — 47 — 36 26 5 — — 4 202 The following is an analysis of loans classified as troubled debt restructurings (“TDR”) for the years ended December 31, 2017, 2016 and 2015: Year Ended December 31, 2017 Year Ended December 31, 2016 Year Ended December 31, 2015 Number of TDR Modifications Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Number of TDR Modifications Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Number of TDR Modifications Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment (dollars in thousands) Commercial business: Secured . . . . . . . . . . . 10 $ 5,655 $ 5,655 9 $ 2,131 $ 2,131 5 $ 3,724 $ 3,706 Unsecured. . . . . . . . . Real estate: One-to-four family residential. . . . . . . Commercial and multifamily residential: Commercial land Income property . Owner occupied . Commercial and multifamily residential: Owner occupied . Consumer . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . 1 3 1 1 1 1 42 60 26 26 583 583 687 1,152 78 4,050 5,891 687 1,152 78 4,050 5,891 $ 18,122 $ 18,122 — — 203 203 — — 250 — 5,095 $ 7,679 $ — — 250 — 5,093 7,677 — 3 — — 1 — 41 54 79 — 1 — — — — 1 7 — 30 — — — — 54 — 30 — — — — 54 $ 3,808 $ 3,790 ff The Company’s loans classified as TDR are loans that have been modified or the borrower has been granted special that if not for the challenges of the borrower, the Company would not otherwise concessions due to financial difficulties, consider. The Company had $506 thousand of commitments to lend additional funds on loans classified as TDR as of December 31, 2017 as compared to $508 thousand of similar commitments at 2016. The TDR modifications or concessions are made to increase the likelihood that these borrowers with financial difficulties amended. The concessions granted in the restructurings summarized in the table above largely consisted of maturity extensions, interest rate modifications or a combination of both. In limited circumstances, a reduction in the principal balance of the loan could also be made as a concession. Credit losses for loans classified as TDR are measured on the same basis as impaired loans. For impaired loans, an allowance is established when the collateral value less selling costs ((or di impaired lloan iis llower hthan hthe b observable bl defaulted i hiwithin 12 any lloans 2017, 2016, recorded iinvestment of hthat lloan. hThe Company diddid not hhave December 31, b d d modified as TDR d iduring hthe years will be able to satisfy their debt obligations as kmarket difi d dand 2015. modified as TDR hthat d f hmonths of b ibeing price) of hthe i hcash flflows ror discounted d i d l d ended d d difi d ) ff i Purchased CCr iedit Impaired Loans (“ C(“PCI i Loans”) ”) PCI loans are accounted for under ASC 310-30 and initially measured at fair value based on expected future cash flows over the life of the loans. Loans that have common risk characteristics are aggregated into pools. The Company re-measures contractual and expected cash flows, at the pool-level, on a quarterly basis. Contractual cash flows are calculated based upon the loan pool terms after applying a prepayment factor. Calculation of the applied prepayment factor for contractual cash flows is the same as described below for expected cash flows. Inputs to the determination of expected cash flows include cumulative default and prepayment data as well as loss severity and recovery lag information. Cumulative default and prepayment data are calculated via a transition matrix. The transition matrix is a matrix of probability values that specifies the probability of a loan pool transitioning into a particular delinquency state (e.g. 0-30 days past due, 31 to 60 days, etc.) given its delinquency state at the re-measurement date. Loss severity factors are based upon either actual charge-offff data within the loan pools or industry averages, and recovery lags are based upon the collateral within the loan pools. The excess of cash flows expected to be collected over the initial fair value of purchased credit impaired loans is referred to as the accretable yield and is accreted into interest income over the estimated life of the acquired loans using the effective yield method. Other adjustments to the accretable yield include changes in the estimated remaining life of the acquired loans, changes in expected cash flows and changes of indices for acquired loans with variable interest rates. ff 80 The following is an analysis of our PCI loans, net of related allowance for losses and remaining valuation discounts as of December 31, 2017 and 2016: Commercial business . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Real estate: One-to-four family residential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Commercial and multifamily residential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total real estate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Real estate construction: One-to-four family residential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Commercial and multifamily residential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total real estate construction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Subtotal of purchased credit impaired loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . Less: December 31, 2017 December 31, 2016 (in thousands) $ 13,753 $ 21,606 14,610 79,211 93,821 177 595 12,412 120,758 20,643 94,795 115,438 832 1,726 2,558 17,649 157,251 11,591 10,515 135,145 Valuation discount resulting from acquisition accounting . . . . . . . . . . . . . . . . . Allowance for loan losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PCI loans, net of valuation discounts and allowance for loan losses . . . . . . . . . . . . . $ 6,907 105,763 $ The following table shows the changes in accretable yield for acquired loans for the years ended December 31, 2017, 2016, and 2015: Years Ended December 31, 2017 2016 (in thousands) 2015 Balance at beginning of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accretion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disposals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reclassifications from (to) nonaccretable difference . . . . . . . . . . . . . . . . ff $ 45,191 $ 58,981 $ (12,357) (158) (1,500) (16,266) (148) 2,624 Balance at end of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 31,176 $ 45,191 $ 73,849 (21,919) (1,681) 8,732 58,981 The Company did not acquire any loans accounted for under ASC 310-30 during 2017 or 2016. 6. Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit We record an allowance to recognize management’s estimate of credit losses incurred in the loan portfolio at each balance sheet date. We have used the same methodology for allowance calculations during the twelve month periods ended December 31, 2017 and December 31, 2016. 81 The following tables show a detailed analysis of the allowance for loans for the years ended December 31, 2017, 2016 and 2015: Year Ended December 31, 2017 Commercial business: Beginning Balance Charge-offs Recoveries Provision (Recovery) Ending Balance Specific Reserve General Allocation (in thousands) Secured . . . . . . . . . . . . . . . . . . . . . . . . $ 36,050 $ (7,524) $ 4,283 $ (3,468) $ 29,341 $ 1,867 $ 27,474 960 599 Unsecured . . . . . . . . . . . . . . . . . . . . . . Real estate: One-to-four family residential . . . . . . . . . . . Commercial and multifamily residential: Commercial land. . . . . . . . . . . . . . . . . Income property . . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . . Real estate construction: One-to-four family residential: Land and acquisition . . . . . . . . . . . . . . Residential construction . . . . . . . . . . . 316 669 Commercial and multifamily residential: Income property . . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . . Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Purchased credit impaired. . . . . . . . . . . . . . . . . . . Unallocated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,534 10,515 226 (89) (460) — (287) — (14) — — — (1,474) (6,812) — 553 568 53 498 124 72 106 1 — 1,187 6,187 — 576 2,000 3 1,997 (6) 701 2,415 (1,881) (1,104) 589 2,934 6,648 3,221 1,916 (2,983) (226) 4,265 5,672 5,459 963 3,709 7,053 4,413 5,163 6,907 — 103 — 185 3 — — — — 199 — — 598 4,265 5,487 5,456 963 3,709 7,053 4,413 4,964 6,907 — Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 70,043 $ (16,660) $ 13,632 $ 8,631 $ 75,646 $ 2,360 $ 73,286 Year Ended December 31, 2016 Commercial business: Beginning Balance Charge-offs Recoveries Provision (Recovery) Ending Balance Specific Reserve General Allocation (in thousands) Secured . . . . . . . . . . . . . . . . . . . . . . . . $ 32,321 $ (9,993) $ 2,483 $ 11,239 $ 36,050 $ 664 $ 35,386 Unsecured . . . . . . . . . . . . . . . . . . . . . . 1,299 Real estate: One-to-four family residential . . . . . . . . . . . 916 Commercial and multifamily residential: Commercial land. . . . . . . . . . . . . . . . . Income property . . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . . Real estate construction: One-to-four family residential: Land and acquisition . . . . . . . . . . . . . . Residential construction . . . . . . . . . . . 339 733 Commercial and multifamily residential: Income property . . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . . (75) (35) (26) — (63) (88) — — — Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Purchased credit impaired. . . . . . . . . . . . . . . . . . . Unallocated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,531 13,726 569 (1,238) (9,944) — 162 171 2 966 434 57 234 109 — 933 7,004 — (426) (453) 643 (240) 518 8 (298) (93) 186 308 (271) (343) 960 599 1,797 7,342 6,439 316 669 404 1,192 3,534 10,515 226 — 12 — 27 — 1 — — — 57 — — 960 587 1,797 7,315 6,439 315 669 404 1,192 3,477 10,515 226 Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 68,172 $ (21,462) $ 12,555 $ 10,778 $ 70,043 $ 761 $ 69,282 82 Year ended December 31, 2015 Commercial business: Beginning Balance Charge-offs Recoveries Provision (Recovery) Ending Balance Specific Reserve General Allocation (in thousands) Secured . . . . . . . . . . . . . . . . . . . . . . . . $ 25,923 $ (7,486) $ 2,069 $ 11,815 $ 32,321 $ 321 $ 32,000 Unsecured . . . . . . . . . . . . . . . . . . . . . . 927 Real estate: One-to-four family residential . . . . . . . . . . . 2,281 Commercial and multifamily residential: Commercial land. . . . . . . . . . . . . . . . . Income property . . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . . Real estate construction: One-to-four family residential: Land and acquisition . . . . . . . . . . . . . . Residential construction . . . . . . . . . . . 1,197 1,860 Commercial and multifamily residential: Income property . . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . . (780) (376) — (390) (115) — — — — Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Purchased credit impaired. . . . . . . . . . . . . . . . . . . Unallocated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,180 16,336 1,844 (2,066) (13,854) — 267 307 291 3,568 116 103 90 8 — 931 7,329 — 885 1,299 — 1,299 (1,296) 916 314 602 88 (5,721) 542 (961) (1,217) (242) 572 1,486 3,915 (1,275) 1,178 6,616 5,550 339 733 388 1,006 3,531 13,726 569 — — — — 3 — — 15 — — 1,178 6,616 5,550 339 730 388 1,006 3,516 13,726 569 Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 69,569 $ (25,067) $ 15,079 $ 8,591 $ 68,172 $ 653 $ 67,519 Changes in the allowance for unfunded commitments and letters of credit, a component of “Other liabilities” in the Consolidated Balance Sheets, are summarized as follows: Beginning balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net changes in the allowance for unfunded commitments and letters of credit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ending balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ Risk Elements Years Ended December 31, 2017 2016 2015 (in thousands) 2,705 425 3,130 $ $ 2,930 (225) 2,705 $ $ 2,655 275 2,930 The extension of credit in the form of loans or other credit products to individuals and businesses is one of our principal business activities. Our policies and applicable laws and regulations require risk analysis as well as ongoing portfolio and credit management. We manage our credit risk through lending limit constraints, credit review,ww approval policies and extensive, ongoing internal monitoring. We also manage credit risk through diversification of the loan portfolio by type of loan, type of industry and type of borrower and by limiting the aggregation of debt to a single borrower. Risk ratings are reviewed and updated whenever appropriate, with more periodic reviews as the risk and dollar value of loss on the loan increases. In the event full collection of principal and interest is not reasonably assured, the loan is appropriately downgraded and, if warranted, placed on nonaccrual status even though the loan may be current as to principal and interest payments. Additionally,yy we assess whether an impairment of a loan warrants specific reserves or a write-down of the loan. Pass rated loans are generally considered to have sufficient ff sources of repayment in order to repay the loan in full in accordance with all terms and conditions. Special Mention rated loans have potential weaknesses that, if left uncorrected, may result in deterioration of the repayment prospects for the asset or in the Company’s credit position at some future date. Loans with a risk rating of Substandard or worse are reported as classified loans in our allowance analysis. We review these loans to assess the ability of our borrowers to service all interest and principal obligations and, as a result, the risk rating may be adjusted accordingly. Loans risk rated as Substandard reflect loans where a loss is possible if loan weaknesses are not corrected. Doubtful loans have a high probability of loss; however, the amount of loss has not yet been determined. Loss rated loans are considered uncollectable and when identified, are charged off.ff 83 The following is an analysis of the credit quality of our loan portfolio, excluding PCI loans as of December 31, 2017 and 2016: December 31, 2017 Loans, excluding PCI loans Commercial business: Pass Special Mention Substandard Doubtful Loss Total (in thousands) Secured . . . . . . . . . . . . . . . . . . . . . . . $ 3,049,031 123,621 Unsecured . . . . . . . . . . . . . . . . . . . . . $ 64,600 — $ 122,030 554 $ — $ — $ 3,235,661 124,175 — — Real estate: One-to-four family residential . . . . . . . . . Commercial and multifamily residential: Commercial land . . . . . . . . . . . . . . . . Income property . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . Real estate construction: One-to-four family residential: Land and acquisition . . . . . . . . . . . . . Residential construction . . . . . . . . . . Commercial and multifamily residential: Income property . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . Consumer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total. . . . . . . . . . . . . . . . . . . . . . . . . . Less: 183,312 1,186 2,056 283,673 1,857,832 1,546,775 5,204 17,181 7,380 7,104 31,323 45,831 9,882 187,863 — — 25 1,828 — — — — — — — — — — — — 293,028 68,393 323,129 , $ 7,926,539 , — — — , $ 95,551 — 4,050 9,096 , $ 223,897 — — — — — — $ — $ — 186,554 295,981 1,906,336 1,599,986 9,907 189,691 293,028 72,443 332,225 8,245,987 Allowance for loan losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68,739 , Loans, excluding PCI loans, net. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 8,177,248 , December 31, 2016 Loans, excluding PCI loans Commercial business: Pass Special Mention Substandard Doubtful Loss Total (in thousands) Secured . . . . . . . . . . . . . . . . . . . . . . . $ 2,289,307 93,721 Unsecured . . . . . . . . . . . . . . . . . . . . . $ 65,846 800 $ 96,437 216 $ — $ — $ 2,451,590 94,737 — — Real estate: One-to-four family residential . . . . . . . . . Commercial and multifamily residential: Commercial land . . . . . . . . . . . . . . . . Income property . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . Real estate construction: One-to-four family residential: Land and acquisition . . . . . . . . . . . . . Residential construction . . . . . . . . . . Commercial and multifamily residential: Income property . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . Consumer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total. . . . . . . . . . . . . . . . . . . . . . . . . . Less: 164,797 395 2,740 263,195 1,341,978 1,027,019 3,228 17,902 6,608 4,391 9,866 26,351 11,541 108,941 — — 15 688 — — — — — — — — — — — — 103,779 98,948 317,728 , $ 5,820,954 , — 88 — , $ 94,867 — 4,444 6,794 , $ 151,942 — — — — — — $ — $ — 167,932 270,814 1,369,746 1,059,978 11,556 109,629 103,779 103,480 324,522 6,067,763 Allowance for loan losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59,528 , Loans, excluding PCI loans, net. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 6,008,235 , 84 The following is an analysis of the credit quality of our PCI loan portfolio as of December 31, 2017 and 2016: December 31, 2017 PCI loans: Commercial business: Pass Special Mention Substandard Doubtful Loss Total (in thousands) Secured . . . . . . . . . . . . . . . . . . . . . . . $ Unsecured. . . . . . . . . . . . . . . . . . . . . 11,918 1,045 $ — $ — $ — $ — — $ — 12,641 1,112 Real estate: One-to-four family residential. . . . . . . . . Commercial and multifamily residential: Commercial land . . . . . . . . . . . . . . . Income property . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . Real estate construction: One-to-four family residential: Land and acquisition . . . . . . . . . . . . Residential construction . . . . . . . . . . Commercial and multifamily residential: Income property . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . Less: 13,817 9,460 25,981 42,617 169 — 595 — 11,705 , $ 117,307 $ — 349 — — — — — — — 349 723 67 793 — 35 769 8 — — — — — — — — — 707 , 3,102 $ $ — — — — $ — — — — — — — — — — 14,610 9,809 26,016 43,386 177 — 595 — 12,412 120,758 Valuation discount resulting from acquisition accounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Allowance for loan losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8,088 6,907 , PCI loans, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 105,763 December 31, 2016 PCI loans: Commercial business: Pass Special Mention Substandard Doubtful Loss Total (in thousands) Secured . . . . . . . . . . . . . . . . . . . . . . . $ Unsecured. . . . . . . . . . . . . . . . . . . . . 18,824 736 $ Real estate: One-to-four family residential. . . . . . . . . Commercial and multifamily residential: Commercial land . . . . . . . . . . . . . . . Income property . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . Real estate construction: One-to-four family residential: Land and acquisition . . . . . . . . . . . . Residential construction . . . . . . . . . . Commercial and multifamily residential: Income property . . . . . . . . . . . . . . . . Owner occupied . . . . . . . . . . . . . . . . Consumer . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . Less: 19,293 7,333 31,042 53,623 744 — 1,217 509 17,202 , $ 150,523 $ 92 — — — — — — — — — — 92 $ $ 1,954 — — $ — — $ — 20,870 736 1,350 213 1,678 906 88 — — — 447 , 6,636 $ — — — — — — — — — — $ $ — — — — — — — — — — 20,643 7,546 32,720 54,529 832 — 1,217 509 17,649 157,251 Valuation discount resulting from acquisition accounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Allowance for loan losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11,591 10,515 , PCI loans, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 135,145 85 7. Other Real Estate Owned The following table sets forth activity in OREO for the period: December 31, 2017 December 31, 2016 (in thousands) Balance, beginning of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Established through acquisitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transfers in. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valuation adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Proceeds from sale of OREO property. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gain (loss) on sale of OREO, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Balance, end of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ 5,998 10,279 106 (364) (2,590) (131) 13,298 $ $ 13,738 — 1,047 (860) (8,158) 231 5,998 At December 31, 2017, the carrying amount of foreclosed residential real estate properties held as a result of obtaining physical possession was $74 thousand and the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process was $302 thousand. 8. FDIC Loss-sharing Asset and Covered Assets During the current year, we entered into an agreement with the FDIC to terminate all loss-sharing agreements ahead of their contractual maturities. These loss-sharing agreements were entered into in 2010 and 2011 in conjunction with our acquisitions of (1) Columbia River Bank in January 2010, (2) American Marine Bank in January 2010, (3) Summit Bank in May 2011 and (4) First Heritage Bank in May 2011. Under the early termination, all rights and obligations of the Company and the FDIC have been resolved and completed. The Company paid the FDIC $4.7 million as consideration for early termination. The early termination was recorded in the Company’s financial statements by removing the remaining FDIC loss-sharing asset of $3.1 million and the remaining FDIC clawback liability of $5.4 million and recording a one-time, pre-tax charge on termination of $2.4 million, recorded to “Other” noninterest expense. Prior to entering into the termination agreement, the Company had $74.0 million of non-single family covered assets and $26.4 million of single family covered assets at March 31, 2017. As a result of the termination agreement, the Company will benefit from all future recoveries, and be responsible for all future losses and expenses related to the assets previously subject to the loss-sharing agreements. The following table shows a detailed analysis of the FDIC loss-sharing asset for the years ending December 31, 2017 and 2016: Balance at beginning of period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjustments not reflected in income: Cash paid to the FDIC, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FDIC shared recoveries, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Termination of FDIC loss-sharing agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjustments reflected in noninterest income (1): Amortization, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loan impairment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sale of other real estate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valuation adjustments of other real estate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Balance at end of period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2017 2016 (in thousands) $ 3,535 $ 6,568 184 (149) (3,123) (414) 40 18 — $ (91) — $ 705 (1,153) — (2,829) 301 148 (22) (183) 3,535 __________ (1) Amounts shown in the table above for adjustments reflected in noninterest income include only those adjustments recorded to the noninterest income line item “Change in FDIC loss-sharing asset” in the Consolidated Statements of Income and do not include the charge related to the termination of the FDIC loss-sharing agreements. 86 9. Premises and Equipment Real and personal property and software, less accumulated depreciation and amortization, were as follows: Land . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Buildings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Leasehold improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Furniture and equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Computer software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total cost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Less accumulated depreciation and amortization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ December 31, 2017 2016 (in thousands) $ 54,510 110,216 24,184 30,486 473 20,384 (70,763) 169,490 $ 47,438 101,196 19,491 26,709 536 18,657 214,027 (63,685) 150,342 Total depreciation and amortization expense was $9.8 million, $11.8 million, and $12.3 million, for the years ended December 31, 2017, 2016, and 2015, respectively. 10. Goodwill and Other Intangible Assets In accordance with the Intangibles – Goodwill and Other topic of the FASB ASC, goodwill is not amortized but is reviewed for potential impairment at the reporting unit level. Management analyzes its goodwill for impairment on an annual basis and between annual tests in certain circumstances such as upon material adverse changes in legal, business, regulatory and economic factors. An impairment loss is recorded to the extent that the carrying amount of goodwill exceeds its implied fair value. The Company performed its annual impairment assessment as of July 31, 2017 and concluded that there was no impairment. As of December 31, 2017 we determined there were no events or circumstances which would more likely than not reduce the fair value of our reporting unit below its carrying amount. The core deposit intangible (“CDI”) is evaluated for impairment if events and circumstances indicate a possible impairment. The CDI is amortized on an accelerated basis over an estimated life of 10 years. The following table sets forth activity for goodwill and other intangible assets for the period: Goodwill, beginning of period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Established through acquisitions and provisional period adjustments (1). Total goodwill, end of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 382,762 383,080 765,842 (in thousands) 382,762 $ — 382,762 $ 382,537 225 382,762 Years Ended December 31, 2017 2016 2015 Other intangible assets, net Core deposit intangible: Gross core deposit intangible balance, beginning of period . . . . . . . . . Accumulated amortization, beginning of period. . . . . . . . . . . . . . . . . . Core deposit intangible, net, beginning of period . . . . . . . . . . . . . . . . . Established through acquisition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CDI current period amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total core deposit intangible, end of period. . . . . . . . . . . . . . . . . . Intangible assets not subject to amortization . . . . . . . . . . . . . . . . . . . . . . . Other intangible assets, net at end of period . . . . . . . . . . . . . . . . . . . . . . . Total goodwill and intangible assets, end of period. . . . . . . . . . . . . . . . . . 58,598 46,875 (6,333) 919 58,173 24,015 58,598 (35,940) 22,658 — (5,946) 16,712 919 17,631 58,598 (29,058) 29,540 — (6,882) 22,658 919 23,577 $ 400,393 $ 406,339 __________ (1) See Note 2, Business Combinations, for additional information regarding the goodwill related to the acquisition of Pacific Continental on November 1, 2017. 87 The following table provides the estimated future amortization expense of core deposit intangibles for the succeeding five years: Years Ending December 31, g 2018 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2021 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2022 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ (in thousands) 12,235 10,479 8,724 7,264 5,880 11. Deposits Year-end deposits are summarized in the following table: December 31, 2017 2016 (in thousands) Core deposits: Demand and other noninterest-bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest-bearing demand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Money market . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Savings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Certificates of deposit, less than $250,000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total core deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Certificates of deposit, $250,000 or more . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Certificates of deposit insured through CDARS® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other brokered certificates of deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Brokered money market accounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Subtotal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valuation adjustment resulting from acquisition accounting . . . . . . . . . . . . . . . . . . Total deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ ,081,901 1,265,212 2,543,712 861,941 286,791 10,039,557 25,374 78,481 289,031 10,532,842 $ 10,532,085 $ 3,944,495 985,293 1,791,283 723,667 304,830 7,749,568 79,424 22,039 — 208,348 8,059,379 36 8,059,415 Overdrafts of $1.6 million and $4.4 million were reclassified as loan balances at December 31, 2017 and 2016, respectively. The following table shows the amount and maturity of time deposits: Years Ending December 31, g 2018 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2021 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2022 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ (in thousands) 338,958 74,177 34,727 20,857 12,600 9,726 491,045 88 12. Federal Home Loan Bank and Federal Reserve Bank Borrowings FEDERAL HOME LOAN BANK The Company has entered into borrowing arrangements with the FHLB of Des Moines (“FHLB”) to borrow funds under a short-term floating rate fed funds overnight advance program and fixed-term loan agreements. All borrowings are secured by stock of the FHLB and a blanket pledge of qualifying loans receivable. At December 31, 2017, FHLB advances were scheduled to mature as follows: Federal Home Loan Bank Advances Fixed rate advances Weighted Average Rate Amount (dollars in thousands) 2.58% $ Within 1 year . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.85% Over 1 through 5 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.37% Due after 10 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valuation adjustment from acquisition accounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 4,000 2,000 5,000 11,000 579 11,579 The maximum, average outstanding and year-end balances and average interest rates on advances from the FHLB were as follows for the years ended December 31, 2017, 2016 and 2015: Years ended December 31, 2017 2016 2015 (dollars in thousands) Balance at end of period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Average balance during period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum month-end balance during period . . . . . . . . . . . . . . . . . . . . . Weighted average rate during period . . . . . . . . . . . . . . . . . . . . . . . . . . . Weighted average rate at December 31 . . . . . . . . . . . . . . . . . . . . . . . . . $ $ $ 11,579 79,788 317,480 1.33% 4.08% FHLB advances are collateralized by the following: Recorded value of blanket pledge on loans receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FHLB borrowing capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FEDERAL RESERVERR BANK $ $ $ $ $ $ 6,493 79,673 250,515 $ $ $ 68,531 70,678 242,556 0.80% 5.42% 0.68% 0.79% December 31, 2017 2016 (in thousands) 1,443,554 1,443,554 1,432,554 $ $ $ 1,510,514 1,510,514 1,502,284 The Company is also eligible to borrow under the Federal Reserve Bank’s primary credit program, including the Term Auction Facility auctions. All borrowings are secured by certain pledged available for sale investment securities. Although the Company has not had FRB borrowings in the last three years, the Company pledges securities and loans for borrowing capacity at the Federal Reserve Bank. The following table shows amounts pledged to the Federal Reserve Bank: Fair value of investment securities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Recorded value of pledged commercial loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Federal Reserve Bank borrowing capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ 51,172 48,882 100,054 00,054 $ $ $ 32,795 28,212 61,007 61,007 89 December 31, 2017 2016 (in thousands) 13. Securities Sold Under Agreements to Repurchase Securities Sold Under Agreements rr rr to Repurchase - Term The Company has entered into wholesale repurchase agreements with certain brokers. At December 31, 2017 and 2016, the Company held $25.0 million in wholesale repurchase agreements with an interest rate of 1.88%. Securities available for sale with a carrying amount of $28.5 million at December 31, 2017 were pledged as collateral for the repurchase agreement borrowings. The broker holds the securities while the Company continues to receive the principal and interest payments from the securities. Upon maturity of the agreement in 2018, the pledged securities will be returned to the Company. Securities Sold Under Agreements rr rr to Repurchase - Sweep These sweep repurchase agreements are generally short-term agreements. These agreements are treated as financing transactions and the obligations to repurchase securities sold are reflected as a liability in the Consolidated Financial Statements. The dollar amount of securities underlying the agreements remains in the applicable asset account of the Consolidated Financial Statements. These agreements had a balance of $54.1 million and a weighted average interest rate of 0.11% at December 31, 2017. All of these repurchase agreements in existence at December 31, 2017 mature on a daily basis. Securities available for sale with a carrying amount of $66.5 million at December 31, 2017 were pledged as collateral for the sweep repurchase agreement borrowings. 14. Subordinated Debentures On November 1, 2017, with its acquisition of Pacific Continental, the Company assumed $35.0 million in aggregate principal amount of fixed-to-floating rate subordinated debentures (the “Notes”). The Notes are callable at par on June 30, 2021, have a stated maturity of June 30, 2026 and bear interest at a fixed annual rate of 5.875% per year, from and including June 27, 2016, but excluding June 30, 2021. From and including June 30, 2021 through the maturity date or early redemption date, the interest rate will reset quarterly to an annual interest rate equal to the then-current three-month LIBOR plus 471.5 basis points. 15. Junior Subordinated Debentures On November 1, 2017, with its acquisition of Pacific Continental, the Company assumed $14.4 million of trust preferred obligations. The Company redeemed $6.2 million of these obligations during 2017. At December 31, 2017, the remaining $8.2 million of obligations bore interest at a rate of 2.71%, paid quarterly. 16. Derivatives and Balance Sheet Offsetting The Company periodically enters into certain commercial loan interest rate swap agreements in order to provide commercial loan customers the ability to convert from variable to fixed interest rates. Under these agreements, the Company enters into a variable-rate loan agreement with a customer in addition to a swap agreement. This swap agreement effectively converts the customer’s variable rate loan into a fixed rate loan. The Company then enters into a corresponding swap agreement with a third party in order to offset its exposure on the variable and fixed components of the customer agreement. As the interest rate swap agreements with the customers and third parties are not designated as hedges under the Derivatives and Hedging topic of the FASB ASC, the instruments are marked to market in earnings. The notional amount of open interest rate swap agreements at December 31, 2017 and 2016 was $384.7 million and $309.3 million, respectively. Mark-to-market gains of $16 thousand for both 2017 and 2016 and $11 thousand for 2015 were recorded to “Other” noninterest expense. ff ff The following table presents the fair value and balance sheet classification of derivatives not designated as hedging instruments at December 31, 2017 and 2016: Asset Derivatives Liability Derivatives 2017 2016 2017 2016 Balance Sheet Location Fair Value Balance Sheet Location Fair Value Balance Sheet Location Fair Value Balance Sheet Location Fair Value Other assets $ 6,707 Other assets $ 9,012 Other liabilities $ 6,714 Other liabilities $ 9,036 (in thousands) Interest rate contracts 90 The Company is party to interest rate swap agreements and repurchase agreements that are subject to enforceable master netting arrangements or similar agreements. Under these agreements, the Company may have the right to net settle multiple contracts with the same counterparty. The following tables show the gross interest rate swap agreements and repurchase agreements in the Consolidated Balance Sheets and the respective collateral received or pledged in the form of other financial instruments, which are generally marketable securities. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of overcollateralization are not shown. December 31, 2017 Assets Gross Amounts of Recognized Assets/ Liabilities Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts of Assets/Liabilities Presented in the Consolidated Balance Sheets (in thousands) Gross Amounts Not Offset in the Consolidated Balance Sheets Collateral Posted Net Amount Interest rate contracts . . . . . . . . . . . . . . . . . . . . $ 6,707 Liabilities Interest rate contracts . . . . . . . . . . . . . . . . . . . . $ Repurchase agreements . . . . . . . . . . . . . . . . . . 6,714 79,059 December 31, 2016 Assets Interest rate contracts . . . . . . . . . . . . . . . . . . . . $ 9,012 Liabilities Interest rate contracts . . . . . . . . . . . . . . . . . . . . $ Repurchase agreements . . . . . . . . . . . . . . . . . . 9,036 80,822 $ $ $ $ $ $ — $ 6,707 — $ — $ 6,714 79,059 — $ 9,012 — $ — $ 9,036 80,822 $ $ $ $ $ $ — $ 6,707 (6,714) $ (79,059) $ — — — $ 9,012 (9,036) $ (80,822) $ — — The following table presents the class of collateral pledged for repurchase agreements as well as the remaining contractual maturity of the repurchase agreements: December 31, 2017 Class of collateral pledged for repurchase agreements U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations . . . Remaining contractual maturity of the agreements Overnight and continuous Up to 30 days 30 - 90 days (in thousands) Greater than 90 days Total $ 54,059 $ — $ 25,000 $ — $ 79,059 Gross amount of recognized liabilities for repurchase agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79,059 Amounts related to agreements not included in offsetting ff disclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ — The collateral utilized for the Company’s repurchase agreements is subject to market fluctuations as well as prepayments of principal. The Company monitors the risk of the fair value of its pledged collateral falling below acceptable amounts based on the type of the underlying repurchase agreement. The pledged collateral related to the Company’s $25.0 million term wholesale repurchase agreement, which matures in 2018, is monitored on a monthly basis and additional collateral is pledged when necessary. The pledged collateral related to the Company’s $54.1 million sweep repurchase agreements, which mature on an overnight basis, is monitored on a daily basis as the underlying sweep accounts can have frequent transaction activity and the amount of pledged collateral is adjusted as necessary. 91 17. Employee Benefit Plans 401(k) Plan The Company maintains defined contribution and profit sharing plans in conformity with the provisions of section 401(k) of the Internal Revenue Code. The Columbia Bank 401(k) and Profit Sharing Plan (the “401(k) Plan”), permits Columbia Bank employees who are at least 18 years of age to contribute up to 75% of their eligible compensation to the 401(k) Plan starting on the first day of the month following their hire date. On a per pay period basis the Company is required to match 50% of employee contributions up to 3% of each employee’s eligible compensation. The Company contributed $2.7 million during 2017, $2.4 million during 2016, and $2.3 million during 2015, in matching funds to the 401(k) Plan. Additionally,yy as determined annually by the board of directors of the Company,yy the 401(k) Plan provides for a non-matching discretionary profit sharing contribution. The Company’s discretionary profit sharing contributions were $5.7 million during 2017, $5.1 million during 2016 and $5.2 million during 2015. Employee Stock Purchase rr Plan The Company maintains an “Employee Stock Purchase Plan” (the “ESP Plan”) in which substantially all employees of the Company are eligible to participate. The ESP Plan provides participants the opportunity to purchase common stock of the Company at a discounted price. Under the ESP Plan, participants can purchase common stock of the Company for 90% of the lowest price on either the first or last day in each of two six month look-back periods. The look-back periods are January 1st through June 30th and July 1st through December 31st of each calendar year. The 10% discount is recognized by the Company as compensation expense and does not have a material impact on net income or earnings per common share. Participants of the ESP Plan purchased 38,387 shares for $1.5 million in 2017, 50,116 shares for $1.8 million in 2016 and 42,134 shares for $1.2 million in 2015. At December 31, 2017 there were 411,107 shares available for purchase under the ESP Plan. Supplemental Compensation Plan The Company maintains supplemental compensation arrangements (“Unit Plans”) to provide benefits for certain employees. The Unit Plans generally vest over a 10 year period and provide a fixed annual benefit over the subsequent 10 year period. At December 31, 2017 and 2016, the liability associated with these plans was $4.6 million and $4.8 million, respectively. Expense associated with these plans for the years ended December 31, 2017, 2016 and 2015 was $452 thousand, $467 thousand and $859 thousand, respectively. Supplemental Executive Retirement rr Plan The Company maintains a supplemental executive retirement plan (the “SERP”), a nonqualified deferred compensation plan that provides retirement benefits to certain highly compensated executives. The SERP is unsecured and unfunded and there are no program assets. The SERP projected benefit obligation, which represents the vested net present value of future payments to individuals under the plan is accrued over the estimated remaining term of employment of the participants and has been determined by actuarial valuation using “RP-2014 Adjusted to 2006 Total Dataset Mortality Tablea projected to 2028” for the mortality assumptions and discount rate of 3.80% for 2017 and 4.09% for 2016. Additional assumptions and features of the plan are a normal retirement age of 65 and a 2% annual cost of living benefit adjustment. The projected benefit obligation is included in “Other liabilities” on the Consolidated Balance Sheets. with Scale MP-2017 92 The following table reconciles the accumulated liability for the projected benefit obligation: Balance at beginning of year . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Change in actuarial loss (gain) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Plan amendments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Benefit expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Benefit payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Balance at end of year . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ December 31, 2017 2016 (in thousands) 26,263 (6,453) 148 1,600 (1,005) 20,553 $ $ 25,544 62 — 2,201 (1,544) 26,263 The benefits expected to be paid in conjunction with the SERP are presented in the following table: g Years Ending December 31, 2018 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2021 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2022 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2023 through 2027. . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ (in thousands) 936 963 1,971 2,095 1,135 7,563 14,663 18. Commitments and Contingent Liabilities Lease Commitments: The Company’s lease commitments consist primarily of leased locations under various non- cancellable operating leases that expire between 2018 and 2043. The majority of the leases contain renewal options and provisions for increases in rental rates based on an agreed upon index or predetermined escalation schedule. As of December 31, 2017, minimum future rental payments, exclusive of taxes and other charges, of these leases were: g Years Ending December 31, 2018 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2021 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2022 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total minimum payments. . . . . . . . . . . . . . . $ $ (in thousands) 10,994 10,458 8,730 7,104 6,303 14,482 58,071 Total rental expense on buildings and equipment, net of rental income of $791 thousand, $992 thousand and $1.1 million, was $7.9 million, $8.7 million and $7.4 million, for the years ended December 31, 2017, 2016 and 2015, respectively. Sale-leaseback transactions: On August 11, 2017, the Company sold one of its Idaho facilities and leased back the portion of the facility utilized for branch operations. The lease term is through August 2027, with monthly payments of approximately $26 thousand. The resulting gain on sale of $509 thousand was deferred in accordance with the Leases topic of the FASB ASC and is being amortized over the life of the respective lease. At December 31, 2017, the deferred gain was $490 thousand and is included in “Other liabilities” on the Consolidated Balance Sheets. On August 24, 2016, the Company sold one of its Washington facilities and leased back the portion of the facility utilized for branch operations. The lease term is through August 2026, with monthly payments of approximately $12 thousand. The resulting gain on sale of $742 thousand was deferred in accordance with the Leases topic of the FASB ASC and is being amortized over the life of the respective lease. At December 31, 2017, the deferred gain was $644 thousand and is included in “Other liabilities” on the Consolidated Balance Sheets. 93 Financial Instruments with Off-Balance Sheet Risk: In the normal course of business, the Company makes loan commitments (typically unfunded loans and unused lines of credit) and issues standby letters of credit to accommodate the financial needs of its customers. Standby letters of credit commit the Company to make payments on behalf of customers under specified conditions. Historically,yy no significant losses have been incurred by the Company under standby letters of credit. Both arrangements have credit risk essentially the same as that involved in extending loans to customers and are subject to the Company’s normal credit policies, including collateral requirements, where appropriate. At December 31, 2017 and 2016, the Company’s loan commitments amounted to $2.62 billion and $2.17 billion, respectively. Standby letters of credit were $51.3 million and $49.7 million at December 31, 2017 and 2016, respectively. In addition, commitments under commercial letters of credit used to facilitate customers’ trade transactions and other off-balance December 31, 2017 and 2016, respectively. sheet liabilities amounted to $159 thousand and $3.4 million at ff Legal Proceedings: rr The Company and its subsidiaries are from time to time defendants in and are threatened with various legal proceedings arising from their regular business activities. Management, after consulting with legal counsel, is of the opinion that the ultimate liability,yy if any,yy resulting from these pending or threatened actions and proceedings will not have a material effect on the financial statements of the Company. ff 19. Shareholders’ Equity Preferr edrr rr Stock. In conjunction with the 2013 acquisition of West Coast Bancorp, the Company issued 8,782 shares of mandatorily convertible cumulative participating preferred stock, Series B (“Series B Preferred Stock”). On January 12, 2017, all outstanding shares of Series B Preferred Stock were converted to Company common stock. Dividends. On January 26, 2017, the Company declared a quarterly cash dividend of $0.22 per common share payable on February 22, 2017 to shareholders of record as of the close of business on February 8, 2017. On April 27, 2017, the Company declared a quarterly cash dividend of $0.22 per common share payable on May 24, 2017 to shareholders of record at the close of business on May 10, 2017. On July 27, 2017, the Company declared a quarterly cash dividend of $0.22 per common share payable on August 23, 2017 to shareholders of record at the close of business on August 9, 2017. On October 19, 2017, the Company declared a quarterly cash dividend of $0.22 per common share payable on November 14, 2017 to shareholders of record at the close of business on October 31, 2017. Subsequent to year end, on January 25, 2018, the Company declared a quarterly cash dividend of $0.22 per share payable on February 21, 2018, to shareholders of record at the close of business on February 7, 2018. The payment of cash dividends is subject to federal regulatory requirements for capital levels and other restrictions. In addition, the cash dividends paid by Columbia Bank to the Company are subject to both federal and state regulatory requirements. 94 20. Accumulated Other Comprehensive Loss The following table shows changes in accumulated other comprehensive income (loss) by component for the years ended December 31, 2017, 2016 and 2015: Year Ended December 31, 2017 Beginning balance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other comprehensive income (loss) before reclassifications . . . . Amounts reclassified from accumulated other comprehensive loss (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net current-period other comprehensive income (loss) . . . . . . . . . . Adjustment pursuant to adoption of ASU 2018-02. . . . . . . . . . . . . . Ending balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Year Ended December 31, 2016 Beginning balance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other comprehensive loss before reclassifications . . . . . . . . . . . Amounts reclassified from accumulated other comprehensive loss (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net current-period other comprehensive income (loss) . . . . . . . . . . Ending balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Year Ended December 31, 2015 Beginning balance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other comprehensive loss before reclassifications . . . . . . . . . . . Amounts reclassified from accumulated other comprehensive income (2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net current-period other comprehensive loss . . . . . . . . . . . . . . . . . . Ending balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . __________ (1) All amounts are net of tax. Amounts in parenthesis indicate debits. (2) See following table for details about these reclassifications. Unrealized Gains and Losses on Available-for-Sale Securities (1) Unrealized Gains and Losses on Pension Plan Liability (1) (in thousands) Total (1) 12,704) $ (6,295) $ (18,999) (3,391) 7 (3,384) (3,691) (19,779) 86 (12,338) (752) (13,090) (12,704) ,462 (6,069) (1,007) $ $ $ $ 4,017 223 4,240 (391) (2,446) (6,681) (39) 425 386 (6,295) (1,841) (5,054) 214 (4,840) $ $ $ $ 386 $ (6,681) $ 626 230 856 (4,082) (22,225) (6,295) (12,377) (327) (12,704) (18,999) 5,621 (11,123) (793) (11,916) (6,295) $ $ $ In December 2017, the Company made an election to reclassify income tax effects related to the Tax Cuts and Jobs Act of $4.1 million from accumulated other comprehensive income to retained earnings. The Company uses the portfolio approach to account for the tax consequences of amounts reported in OCI. ff 95 The following table shows details regarding the reclassifications from accumulated other comprehensive income for the years ended December 31, 2017, 2016 and 2015: Amount Reclassified from Accumulated Other Comprehensive Income Affected line Item in the Consolidated Statement of Income Years Ended December 31, 2017 December 31, 2016 December 31, 2015 (in thousands) Unrealized gains and losses on available-for- sale securities . . . . . . . . . . . . . . . . . . . . . . . . . $ (11) $ (11) 4 1,181 1,181 (429) Investment securities gains $ 1,581 (losses), net 1,581 Total before tax (574) Income tax benefit (provision) $ (7) $ 752 $ 1,007 Net of tax Amortization of pension plan liability Compensation and employee actuarial losses . . . . . . . . . . . . . . . . . . . . . . . . $ (350) $ (668) $ (336) benefits (350) 127 (223) $ (668) 243 (425) $ (336) Total before tax Income tax benefit 122 (214) Net of tax $ 21. Fair Value Accounting and Measurement The Fair Value Measurements and Disclosures topic of the FASB ASC defines fair value, establishes a consistent framework for measuring fair value and expands disclosure requirements about fair value. We hold fixed and variable rate interest-bearing securities, investments in marketable equity securities and certain other financial instruments, which are carried at fair value. Fair value is determined based upon quoted prices when available or through the use of alternative approaches, such as matrix or model pricing, when market quotes are not readily accessible or available. The valuation techniques are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our own market assumptions. These two types of inputs create the following fair value hierarchy: Level 1 – Quoted prices for identical instruments in active markets that are accessible at the measurement date. Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model derived valuations whose inputs are observable or whose significant value drivers are observable. Level 3 – Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable. Fair values are determined as follows: Securities at fair value are priced using a combination of market activity,yy industry recognized information sources, yield curves, discounted cash flow models and other factors. These fair value calculations are considered a Level 2 input method under the provisions of the Fair Value Measurements and Disclosures topic of the FASB ASC for all securities other than U.S. Treasury Notes and other securities, which are considered a Level 1 input method. Interest rate contract positions are valued in models, which use as their basis, readily observable market parameters and are classified within Level 2 of the valuation hierarchy. 96 The following table sets forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis at December 31, 2017 and 2016 by level within the fair value hierarchy. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement: Fair value at December 31, 2017 Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 (in thousands) Assets Securities available for sale U.S. government agency and sponsored enterprise mortgage-back securities and collateralized mortgage obligations . . . . . . State and municipal securities . . . . . . . . . . . . U.S. government agency and government- sponsored enterprise securities . . . . . . . . . . U.S. government securities. . . . . . . . . . . . . . . Other securities. . . . . . . . . . . . . . . . . . . . . . . . Total securities available for sale. . . . . . . . . . . . . . Other assets (Interest rate contracts) . . . . . . . . . . . Liabilities Other liabilities (Interest rate contracts) . . . . . . . . $ $ $ $ 1,726,725 $ 596,004 414,774 248 5,080 2,742,831 6,707 6,714 — $ — — 248 5,080 1,726,725 $ 596,004 414,774 — — $ $ $ 5,328 $ — $ 2,737,503 6,707 — $ 6,714 $ $ $ Fair value at December 31, 2016 Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 (in thousands) Assets Securities available for sale U.S. government agency and sponsored enterprise mortgage-back securities and collateralized mortgage obligations . . . . . . State and municipal debt securities . . . . . . . . U.S. government agency and government- sponsored enterprise securities . . . . . . . . . . U.S. government securities. . . . . . . . . . . . . . . Other securities. . . . . . . . . . . . . . . . . . . . . . . . Total securities available for sale. . . . . . . . . . . . . . Other assets (Interest rate contracts) . . . . . . . . . . . Liabilities Other liabilities (Interest rate contracts) . . . . . . . . $ 1,465,732 $ 475,060 331,902 800 5,083 2,278,577 9,012 9,036 $ $ $ — $ — — 800 — 1,465,732 $ 475,060 331,902 — 5,083 $ $ $ 800 $ — $ 2,277,777 9,012 — $ 9,036 $ $ $ — — — — — — — — — — — — — — — — During the year ended December 31, 2017 there was a transfer of $5.1 million out of Level 2 of the valuation hierarchy and a corresponding transfer into Level 1 of the valuation hierarchy related to the Company’s other securities. The Company determined that the other securities were traded in active markets. The Company recognizes transfers between levels of the valuation hierarchy based on the valuation level at the end of the reporting period. There were no transfers between Level 1 and Level 2 of the valuation hierarchy during the year ended December 31, 2016. 97 Nonrecurring Measurements Certain assets and liabilities are measured at fair value on a nonrecurring basis after initial recognition such as loans measured for impairment and OREO. The following methods were used to estimate the fair value of each such class of financial instrument: Impaired loans—A loan is considered to be impaired when, based on current information and events, it is probable that interest rate, a loan’s observable market price, or the fair market value of the collateral less estimated costs to sell if the Company will be unable to collect all amounts due (both interest and principal) according to the contractual terms of the loan agreement. Impaired loans are measured based on the present value of expected future cash flows discounted at the loan’s effective ff the loan is a collateral-dependent loan. Generally,yy the Company utilizes the fair market value of the collateral to measure ff impairment. The impairment evaluations are performed in conjunction with the ALLL process on a quarterly basis by officers in the Special Credits group, which reports to the Chief Credit Officer (“REASD”), which also reports to the Chief Credit Officer performing internal evaluations. If an appraisal is obtained from a third-party,yy the REASD reviews the appraisal to evaluate the adequacy of the appraisal report, including its scope, methods, accuracy,yy and reasonableness. . The Real Estate Appraisal Services Department , is responsible for obtaining appraisals from third-parties or ff ff Other real estate owned —OREO is real property that the Bank has taken ownership of in partial or full satisfaction of a loan or loans. OREO is generally measured based on the property’s fair market value as indicated by an appraisal or a letter of intent to purchase. OREO is initially recorded at the fair value less estimated costs to sell. This amount becomes the property’s new basis. Any fair value adjustments based on the property’s fair value less estimated costs to sell at the date of acquisition are charged to the ALLL, or in the event of a write-up without previous losses charged to the ALLL, a credit to earnings is recorded. Management periodically reviews OREO in an effort ff estimated costs to sell. Any fair value adjustments subsequent to acquisition are charged or credited to earnings. The initial and . The subsequent evaluations are performed by officers REASD obtains appraisals from third-parties for OREO and performs internal evaluations. If an appraisal is obtained from a third-party,yy the REASD reviews the appraisal to evaluate the adequacy of the appraisal report, including its scope, methods, accuracy,yy and reasonableness. in the Special Credits group, which reports to the Chief Credit Officer to ensure the property is recorded at its fair value, net of ff ff The following table sets forth the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the years ended December 31, 2017 and 2016: Impaired loans . . . . . . . . . . . . . OREO . . . . . . . . . . . . . . . . . . . . Impaired loans . . . . . . . . . . . . . OREO . . . . . . . . . . . . . . . . . . . . Fair value at December 31, 2017 Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 Losses During the Year Ended December 31, 2017 $ $ 6,577 1,423 , 8,000 Fair value at December 31, 2016 $ $ 3,787 4,388 , 8,175 $ $ $ $ (in thousands) — $ — — $ — $ — — $ 6,577 1,423 , 8,000 $ $ 2,507 239 , 2,746 Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 Losses During the Year Ended December 31, 2016 (in thousands) — $ — — $ — $ — — $ 3,787 4,388 , 8,175 $ $ 5,413 332 , 5,745 The losses on impaired loans disclosed above represent the amount of the specific reserve and/or charge-offsff during the period applicable to loans held at period end. The amount of the specific reserve is included in the “Allowance for loan and lease losses.” The losses on OREO disclosed above represent the write-downs taken at foreclosure that were charged to the allowance for loan and lease losses, as well as subsequent changes in any valuation allowances from updated appraisals that were recorded to earnings. 98 Quantitative information about Level 3 fair value measurements The range and weighted-average of the significant unobservable inputs used to fair value our Level 3 nonrecurring assets during 2017 and 2016, along with the valuation techniques used, are shown in the following tables: Fair value at December 31, 2017 Valuation Technique Unobservable Input Range (Weighted WW Average) (1) Impaired loans - collateral-dependent (3). . $ 3,519 (dollars in thousands) Fair Market Value of Collateral Adjustment to Stated Value Impaired loans - other. . . . . . . . . . . . . . . . . Discounted Cash Flow ,058 Discount Rate OREO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 1,423 (1) Discount rate used in discounted cash flow valuation. Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) 3.75% - 7.75% (4.12%) N/A (2) (2) Quantitative disclosures are not provided for collateral-dependent impaired loans and OREO because there were no adjustments made to the appraisal values or stated values during the current period. (3) Collateral consists of real property and a government agency guarantee. Fair value at December 31, 2016 Valuation Technique Unobservable Input Range (Weighted WW Average) (1) Impaired loans - collateral-dependent (3). . $ 2,248 (dollars in thousands) Fair Market Value of Collateral Adjustment to Stated Value Impaired loans - other. . . . . . . . . . . . . . . . . Discounted Cash Flow ,539 Discount Rate OREO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 4,388 (1) Discount rate used in discounted cash flow valuation. Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) 4.50% - 6.50% (5.26%) N/A (2) (2) Quantitative disclosures are not provided for collateral-dependent impaired loans and OREO because there were no adjustments made to the appraisal values or stated values during the current period. (3) Collateral consists of accounts receivable, inventory,yy equipment and real property. Fair value of financial instruments ff Because broadly traded markets do not exist for most of the Company’s financial instruments, the fair value calculations attempt to incorporate the effect of current market conditions at a specific time. These determinations are subjective in nature, involve uncertainties and matters of significant judgment and do not include tax ramifications; therefore, the results cannot be determined with precision, substantiated by comparison to independent markets and may not be realized in an actual sale or immediate settlement of the instruments. There may be inherent weaknesses in any calculation technique, and changes in the underlying assumptions used, including discount rates and estimates of future cash flows, could significantly affect For all of these reasons, the aggregation of the fair value calculations presented herein do not represent, and should not be construed to represent, the underlying value of the Company. the results. ff 99 The following methods and assumptions were used to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value: Cash and due from banks and interest-earning deposits with banks—The fair value of financial instruments that are short-term or reprice frequently and that have little or no risk are considered to have a fair value that approximates carrying value (Level 1). Securities available for sale—Securities at fair value, other than U.S. Treasury Notes, are priced using a combination of market activity,yy industry recognized information sources, yield curves, discounted cash flow models and other factors (Level 2). U.S. Treasury Notes and other securities are priced using quotes in active markets (Level 1). Federal Home Loan Bank stock—The kk fair value is based upon the par value of the stock which equates to its carrying value (Level 2). Loans held for sale—The carrying amount of loans held for sale approximates their fair values due to the short period of time between the origination and sales dates (Level 2). Loans—Loans are not recorded at fair value on a recurring basis. Nonrecurring fair value adjustments are periodically recorded on impaired loans that are measured for impairment based on the fair value of collateral. For most performing loans, fair value is estimated using expected duration and lending rates that would have been offered on December 31, 2017 or 2016 for loans which mirror the attributes of the loans with similar rate structures and average maturities. The fair values resulting from these calculations are reduced by an amount representing the change in estimated fair value attributable to changes in borrowers’ credit quality since the loans were originated. For nonperforming loans, fair value is estimated by applying a valuation discount based upon loan sales data from the FDIC. For PCI loans, fair value is estimated by discounting the expected future cash flows using a lending rate that would have been offered on December 31, 2017 (Level 3). ff ff FDIC loss-sharing asset —The fair value of the FDIC loss-sharing asset was estimated based on discounting the expected future cash flows using an estimated market rate (Level 3). Interest rate contracts—Interest rate contracts are valued in discounted cash flow models, which use readily observable market parameters as their basis (Level 2). Deposits—For deposits with no contractual maturity,yy the fair value is equal to the carrying value (Level 1). The fair value of fixed maturity deposits is based on discounted cash flows using the difference rates for deposits of similar remaining maturities (Level 2). ff between the deposit rate and current market FHLB advances—The fair value of FHLB advances is estimated based on discounting the future cash flows using the market rate currently offered ff (Level 2). Repurchase agreements—The fair value of term repurchase agreements is estimated based on discounting the future The carrying amount of sweep repurchase agreements approximates their cash flows using the market rate currently offered. fair values due to the short period of time between repricing dates (Level 2). ff Subordinated debentures—The fair value of subordinated debentures is estimated using the quoted prices for similar or identical instruments in markets that are not active (Level 2). Junior subordinated debentures—The fair value is estimated as the carrying value as these obligations are redeemable and a market participant would expect redemption in the near-term. Subsequent to year-end, on January 7, 2018, the Company redeemed these obligations at their carrying amount (Level 2). Other financial instruments—The majority of our commitments to extend credit and standby letters of credit carry current market interest rates if converted to loans, as such, carrying value is assumed to equal fair value. 100 The following tables summarize carrying amounts and estimated fair values of selected financial instruments for the periods indicated: Assets December 31, 2017 Carrying Amount Fair Value Level 1 Level 2 Level 3 (in thousands) Cash and due from banks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 244,615 $ 244,615 $ 244,615 $ Interest-earning deposits with banks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97,918 97,918 97,918 — $ — Securities available for sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,742,831 2,742,831 5,328 2,737,503 FHLB stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loans held for sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10,440 5,766 10,440 5,766 Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8,283,011 8,055,817 Interest rate contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,707 6,707 — — — — Liabilities 10,440 5,766 6,707 — 8,055,817 Deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 10,532,085 $ 10,524,135 $ 10,041,040 $ 483,095 $ FHLB advances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Repurchase agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Subordinated debentures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Junior subordinated debentures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest rate contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11,579 79,059 35,647 8,248 6,714 12,281 79,070 35,895 8,248 6,714 — — — — — 12,281 79,070 35,895 8,248 6,714 — — — — — — — — — — — — December 31, 2016 Carrying Amount Fair Value Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 193,038 $ 193,038 $ 193,038 $ Interest-earning deposits with banks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31,200 31,200 31,200 — $ — Securities available for sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,278,577 2,278,577 800 2,277,777 FHLB stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loans held for sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10,240 5,846 10,240 5,846 Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,143,380 6,040,439 FDIC loss-sharing asset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest rate contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,535 9,012 867 9,012 — — — — — 10,240 5,846 — — 9,012 Liabilities Deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 8,059,415 $ 8,055,168 $ 7,653,122 $ 402,046 $ FHLB advances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Repurchase agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest rate contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,493 80,822 9,036 7,070 81,131 9,036 — — — 7,070 81,131 9,036 — — — — — 6,040,439 867 — — — — — 22. Earnings per Common Share The Company applies the two-class method of computing basic and diluted EPS. Under the two-class method, EPS is determined for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. The Company issues restricted shares under share-based compensation plans and preferred shares which qualify as participating securities. 101 The following table sets forth the computation of basic and diluted earnings per share for the periods indicated: Basic EPS: Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Less: Earnings allocated to participating securities Preferred shares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nonvested restricted shares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Earnings allocated to common shareholders . . . . . . . . . . . . . . . . . . . . . . . . Weighted average common shares outstanding . . . . . . . . . . . . . . . . . . . . . . Basic earnings per common share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diluted EPS: Earnings allocated to common shareholders . . . . . . . . . . . . . . . . . . . . . . . . Weighted average common shares outstanding . . . . . . . . . . . . . . . . . . . . . . of equity awards and warrants . . . . . . . . . . . . . . . . . . . . . . . Dilutive effect Weighted average diluted common shares outstanding . . . . . . . . . . . . . . . . Diluted earnings per common share. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ff Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive . . . 23. Share-Based Payments Year Ended December 31, 2017 2016 2015 (in thousands except per share) $ 112,828 $ 104,866 $ 98,827 $ $ $ $ 3 1,501 111,324 59,882 1.86 111,324 59,882 6 59,888 $ $ $ 185 1,371 103,310 57,184 1.81 103,310 57,184 9 57,193 $ $ $ 1.86 $ 1.81 $ 13 19 175 1,075 97,577 57,019 1.71 97,577 57,019 13 57,032 1.71 37 At December 31, 2017, the Company had one equity compensation plan (the “Plan”), which is shareholder approved, that provides for the granting of share options and shares to eligible employees and directors up to 1,800,000 shares. Sharerr Awards: rr Restricted share awards provide for the immediate issuance of shares of Company common stock to the recipient, with such shares held in escrow until certain service conditions are met, generally four years of continual service. Recipients of restricted shares do not pay any cash consideration to the Company for the shares, have the right to vote all shares subject to such grant, and receive all dividends with respect to such shares, whether or not the shares have vested. The fair value of share awards is equal to the fair market value of the Company’s common stock on the date of grant. A summary of changes in the Company’s nonvested shares and related information for the years ended December 31, 2017, 2016 and 2015 is presented below: Nonvested Shares Nonvested at January 1, 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nonvested at December 31, 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nonvested at December 31, 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nonvested at December 31, 2017 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 Weighted Average Grant-Date Fair Value 23.03 28.57 21.55 24.79 25.80 28.40 23.80 27.13 25.81 38.51 25.67 28.97 25.89 Shares 519,785 306,007 (131,775) 665,702 335,593 (153,235) 818,755 337,384 (253,509) 805,706 $ $ $ $ $ $ $ $ $ $ $ $ $ As of December 31, 2017, there was $18.6 million of total unrecognized compensation cost related to nonvested share- based compensation arrangements granted under the Plan. That cost is expected to be recognized over a weighted average period of 2.5 years. The total fair value, as measured on the date of vesting, of shares vested during the years ended December 31, 2017, 2016, and 2015 was $6.5 million, $3.6 million, and $2.8 million, respectively. Sharerr Options: Option awards are generally granted with an exercise price equal to the market price of the Company’s stock at the date of grant; those option awards generally vest based on three years of continual service and are exercisable for a five-year period after vesting. Option awards granted have a 10-year maximum term. The fair value of each option award is estimated on the date of grant using the Black-Scholes option valuation model. The fair value of all options is amortized on a straight-line basis over the requisite service periods, which are generally the vesting periods. The expected life of options granted represents the period of time that they are expected to be outstanding. The expected life is determined based on historical experience with similar awards, giving consideration to the contractual terms and vesting schedules. Expected volatilities of our common stock are estimated at the date of grant based on the historical volatility of the stock. The volatility factor is based on historical stock prices over the most recent period commensurate with at the time of the estimated expected life of the award. The risk-free interest rate is based on the U.S. Treasury curve in effect the award. The expected dividend yield is based on dividend trends and the market value of the Company’s stock price at the time of the award. ff A summary of option activity under the Plan as of December 31, 2017, and changes during the year then ended is presented below: Options Balance at December 31, 2016. . . . . . . . . . . . . . . . . Forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Expired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Balance at December 31, 2017. . . . . . . . . . . . . . . . . Vested or expected to vest at December 31, 2017 . . Total Exercisable at December 31, 2017 . . . . . . . . . Shares (577) (2,284) (2,242) 18,326 18,326 $ $ $ $ $ $ $ Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value ($000) 45.98 54.70 135.97 10.05 38.88 38.88 38.88 0.7 0.7 0.7 $ $ $ 214 214 214 The total intrinsic value of options exercised during the years ended December 31, 2017, 2016, and 2015 was $67 thousand, $232 thousand, and $85 thousand, respectively. There were no options granted during the years ended December 31, 2017, 2016, and 2015. There were no options that vested during the years ended December 2017, 2016, and 2015. As of December 31, 2017, outstanding stock options consist of the following: Ranges of Exercise Prices $0.00 - $9.99 $40.00 - $49.99 $50.00 - $136.93 Number of Option Shares 6,393 349 11,584 18,326 Weighted Average Remaining Contractual Life 1.3 0.5 0.3 0.7 Weighted Average Exercise Price of Option Shares Number of Exercisable Option Shares Weighted Average Exercise Price of Exercisable Option Shares $ $ $ $ 9.91 44.49 54.70 38.88 6,393 349 11,584 18,326 $ $ $ $ 9.91 44.49 54.70 38.88 It is the Company’s policy to issue new shares for share option exercises and share awards. The Company expenses awards of share options and shares on a straight-line basis over the related vesting term of the award. For the years ended December 31, 2017, 2016 and 2015, the Company recognized pre-tax share-based compensation expense of $7.7 million, $5.0 million and $4.1 million, respectively. 103 24. Income Tax The components of income tax expense are as follows: Years Ended December 31, 2017 2016 (in thousands) 2015 Current tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Deferred tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ 42,724 65,155 $ $ 43,069 1,846 44,915 $ $ 36,426 6,367 42,793 Significant components of the Company’s deferred tax assets and liabilities are as follows: Deferred tax assets: Allowance for loan and lease losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Deferred compensation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stock options and restricted stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OREO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nonaccrual interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Purchase accounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unrealized loss on investment securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net operating losses and credit carryforwards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Depreciation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ff Deferred tax liabilities: Asset purchase tax basis difference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FHLB stock dividends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Deferred loan fees. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Purchase accounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Depreciation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total deferred tax liabilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net deferred tax asset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ December 31, 2017 2016 (in thousands) 18,315 9,539 1,438 521 163 — 5,992 7,259 — 985 44,212 (5,709) (782) (4,505) (9,088) (1,581) (2,036) (23,701) 20,511 $ $ 26,638 16,232 1,922 111 320 2,613 7,492 8,597 1,059 851 65,835 (9,037) (1,232) (5,126) — — (155) (15,550) 50,285 A reconciliation of the Company’s effective ff income tax rate with the federal statutory tax rate is as follows: Income tax based on statutory rate. . . . . . . . . . . Reduction resulting from: Tax exempt instruments . . . . . . . . . . . . . . . Life insurance proceeds . . . . . . . . . . . . . . . Acquisition costs. . . . . . . . . . . . . . . . . . . . . Deferred tax asset revaluation . . . . . . . . . . Other, net . . . . . . . . . . . . . . . . . . . . . . . . . . Income tax provision . . . . . . . . . . . . . . . . . . . . . Years Ended December 31, 2017 2016 2015 Amount Percent Amount Percent Amount Percent (dollars in thousands) $ 62,262 35 % $ 52,424 35 % $ 49,567 35 % (8,485) (3,351) 825 12,210 1,694 $ 65,155 (7,433) (5)% (1,680) (2)% — 1 % — 7 % 1 % 1,604 37 % $ 44,915 (6,761) (5)% (1,554) (1)% — — % — — % 1 % 1,541 30 % $ 42,793 (5)% (1)% — % — % 1 % 30 % 104 As of December 31, 2017 and 2016, we had no unrecognized tax benefits. Our policy is to recognize interest and penalties on unrecognized tax benefits in “Provision for income taxes” in the Consolidated Statements of Income. There were no amounts related to interest and penalties recognized for the years ended December 31, 2017 and 2016. As a result of recent acquisitions, the Company has net operating loss carryforwards in the federal, Idaho and Oregon jurisdictions of $24.8 million, $26.9 million and $144 thousand, respectively,yy which begin to expire in 2024 and federal credit carryforwards of $450 thousand. Federal credit carryforwards relate to alternative minimum taxes and have no expiration. The amount of carryforwards that may be utilized annually is limited under Sections 382 and 383 as a result of changes in control. Management believes that these carryforwards will be used in the normal course of business, and as such, has not recorded a valuation allowance. The Company’s 2017 results included the impact of the enactment of the Tax Cuts and Jobs Act, which was signed into law on December 22, 2017. The law includes significant changes to the U.S. corporate tax system, including a Federal corporate rate reduction from 35% to 21%. In 2017, the Company applied the newly enacted corporate federal income tax rate of 21% resulting in an approximately $12.2 million increase in tax expense from the re-measurement of its net deferred tax assets. The final impact of the tax rate change may differ due to changes in assumption made by the Company or actions the Company may take as a result of tax reform. ff 25. Regulatory Capital Requirements The Company (on a consolidated basis) and its banking subsidiary are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company and its banking subsidiary’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and its banking subsidiary must meet specific capital guidelines that involve quantitative measures of assets, liabilities, and certain off-balance capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Prompt corrective action provisions are not applicable to bank holding companies. sheet items as calculated under regulatory accounting practices. The ff ff Basel III capital requirements became effective ff on January 1, 2015. The new capital requirements, among other things (i) specify that Tier 1 capital consists of “Common Equity Tier 1,” or CET1, and “Additional Tier 1 capital” instruments meeting specified requirements, (ii) define CET1 narrowly by requiring that most deductions/adjustments to regulatory capital measures be made to CET1 and not to the other components of capital and (iii) expand the scope of the deductions/adjustments to capital as compared to existing regulations. Under the requirements that are now effective, the minimum capital ratios are (i) 4.5% CET1 to risk-weighted assets, (ii) 6% Tier 1 capital to risk-weighted assets, (iii) 8% total capital to risk-weighted assets and (iv) 4% Tier 1 capital to average total assets (Tier 1 leverage). The Company and the Bank have made the one-time election to opt-out of including accumulated other comprehensive income items in regulatory capital calculations. ff The New Capital Rules also require a new capital conservation buffer ff designed to absorb losses during periods of ff economic stress. The capital conservation buffer ratios. In addition, the New Capital Rules provide for a countercyclical capital buffer institutions. We do not expect the countercyclical capital buffer ratio of CET1 to risk-weighted assets above the minimum but below the capital conservation buffer capital conservation buffer equity repurchases and compensation based on the amount of the shortfall. and countercyclical capital buffer ff ff ff ff to be applicable to us or the Bank. Banking institutions with a (or below the combined , when the latter is applied) will face constraints on dividends, ff is composed entirely of CET1, on top of these minimum risk-weighted asset applicable only to certain covered The implementation of the capital conservation buffer ff began on January 1, 2016 at the 0.625% level and will be phased of 2.5% of CET1, effectively in over a three-year period (increasing by 0.625% on each subsequent January 1, until it reaches 2.5% on January 1, 2019). When fully phased-in, the New Capital Rules will require us, and the Bank, to maintain such additional capital conservation buffer ff to risk-weighted assets, and (iii) 10.5% total capital to risk-weighted assets. At December 31, 2017, the capital conservation for the Company and the Bank was 4.9796% and 4.8123%, respectively. As such, we believe that, as of December 31, ff buffer 2017, we and the Bank would meet all capital adequacy requirements under the New Capital Rules on a fully phased-in basis as if all such requirements were then in effect. resulting in minimum ratios of (i) 7% CET1 to risk-weighted assets, (ii) 8.5% Tier 1 capital ff ff FDIC regulations set forth the qualifications necessary for a bank to be classified as “well-capitalized,” primarily for assignment of FDIC insurance premium rates. To qualify as “well-capitalized,” banks must have a CET1 risk-adjusted capital ratio of 6.5%, a Tier I risk-adjusted capital ratio of at least 8%, a total risk-adjusted capital ratio of at least 10% and a leverage ratio of at least 5%. Failure to qualify as “well-capitalized” can negatively impact a bank’s ability to expand and to engage in certain activities. 105 As of December 31, 2017, the most recent notification from the Federal Deposit Insurance Corporation categorized Columbia Bank as well-capitalized under the regulatory framework for prompt corrective action. To be categorized as well- capitalized, an institution must maintain minimum CET1 risk-based, Tier 1 risk-based, total risk-based and Tier 1 leverage ratios as set forth in the following table. There are no conditions or events since the notification that management believes have changed Columbia Bank’s category. The Company and its banking subsidiary’s actual capital amounts and ratios as of December 31, 2017 and 2016 are presented in the following table: Minimum Required For Capital Adequacy Purposes Minimum Required Plus Capital Conservation Buffer Phase-In Minimum Required Plus Capital Conservation Buffer Fully Phased-In To Be Well Capitalized Under Prompt Corrective Action Provision Actual Amount Ratio Amount Ratio Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) As of December 31, 2017 CET1 Capital (to risk- weighted assets): The Company . . . . . $ 1,158,252 11.7421% $ 443,886 4.50% $ 567,187 5.75% $ 690,489 7.00% N/A N/A Columbia Bank . . . . $ 1,184,476 12.0133% $ 443,687 4.50% $ 566,933 5.75% $ 690,180 7.00% $ 640,881 6.50% Tier 1 Capital (to risk- weighted assets): The Company . . . . . $ 1,165,903 11.8196% $ 591,848 6.00% $ 715,149 7.25% $ 838,451 8.50% N/A N/A Columbia Bank . . . . $ 1,184,476 12.0133% $ 591,582 6.00% $ 714,829 7.25% $ 838,075 8.50% $ 788,777 8.00% Total Capital (to risk- weighted assets): The Company . . . . . $ 1,280,326 12.9796% $ 789,130 8.00% $ 912,432 9.25% $ 1,035,734 10.50% N/A N/A Columbia Bank . . . . $ 1,263,252 12.8123% $ 788,777 8.00% $ 912,023 9.25% $ 1,035,269 10.50% $ 985,971 10.00% Tier 1 Capital Leverage (to average assets): The Company . . . . . $ 1,165,903 10.9611% $ 425,469 4.00% $ 425,469 4.00% $ 425,469 4.00% N/A N/A Columbia Bank . . . . $ 1,184,476 10.8186% $ 437,939 4.00% $ 437,939 4.00% $ 437,939 4.00% $ 547,423 5.00% As of December 31, 2016 CET1 Capital (to risk- weighted assets): The Company . . . . . Columbia Bank . . . . Tier 1 Capital (to risk- weighted assets): The Company . . . . . Columbia Bank . . . . Total Capital (to risk- weighted assets): The Company . . . . . Columbia Bank . . . . Tier 1 Capital Leverage (to average assets): The Company . . . . . Columbia Bank . . . . $ $ $ $ $ $ $ $ 873,217 862,381 874,688 862,381 947,436 935,129 874,688 862,381 11.6450% $ 337,439 4.50% $ 384,306 5.125% $ 524,906 7.00% N/A N/A 11.5051% $ 337,304 4.50% $ 384,152 5.125% $ 524,696 7.00% $ 487,217 6.50% 11.6646% $ 449,919 6.00% $ 496,786 6.625% $ 637,386 8.50% N/A N/A 11.5051% $ 449,739 6.00% $ 496,587 6.625% $ 637,130 8.50% $ 599,652 8.00% 12.6347% $ 599,892 8.00% $ 646,759 8.625% $ 787,359 10.50% N/A N/A 12.4756% $ 599,652 8.00% $ 646,500 8.625% $ 787,043 10.50% $ 749,565 10.00% 9.5526% $ 366,263 4.00% $ 366,263 4.00% $ 366,263 4.00% N/A N/A 9.4275% $ 365,902 4.00% $ 365,902 4.00% $ 365,902 4.00% $ 457,378 5.00% 106 26. Parent Company Financial Information Condensed Balance Sheets— Parent Company Only Assets Cash and due from banking subsidiary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest-earning deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Investment in banking subsidiary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Investment in other subsidiaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Goodwill (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Liabilities and Shareholders’ Equity Subordinated debentures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Junior subordinated debentures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total liabilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Shareholders’ equity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total liabilities and shareholders’ equity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . December 31, 2017 2016 (1) (in thousands) $ $ $ $ 533 8,765 9,298 1,971,788 5,157 4,729 3,426 1,994,398 35,647 8,248 44,476 1,949,922 1,994,398 $ $ $ $ 1,718 729 2,447 1,238,712 4,978 7 5,139 1,251,283 — — 271 271 1,251,012 1,251,283 _________ (1) Reclassified to conform to current period’s presentation. The reclassification was limited to adding a separate line for Goodwill, which was previously included in other assets. Condensed Statements of Income— Parent Company Only Income Dividend from banking subsidiary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest-earning deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Expense Compensation and employee benefits . . . . . . . . . . . . . . . . . . . . . . . . . . Subordinated debentures interest expense . . . . . . . . . . . . . . . . . . . . . . . Other borrowings interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Total expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Income before income tax benefit and equity in undistributed earnings of subsidiaries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Income tax benefit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Income before equity in undistributed earnings of subsidiaries. . . . . . . Equity in undistributed earnings of subsidiaries . . . . . . . . . . . . . . . . . . Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Years Ended December 31, 2017 2016 (in thousands) 2015 $ 66,800 $ 83,500 $ 67,000 2 8 4 8 5 92 66,810 83,512 67,097 732 304 60 3,090 4,186 62,624 (548) 63,172 543 — — 1,608 2,151 81,361 (748) 82,109 22,757 $ 112,828 $ 104,866 $ 618 — 5 1,368 1,991 65,106 (663) 65,769 33,058 98,827 107 Condensed Statements of Cash Flows— Parent Company Only Operating Activities Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed earnings of subsidiaries . . . . . . . . . . . . . . . Stock-based compensation expense . . . . . . . . . . . . . . . . . . . . . . . . Net changes in other assets and liabilities. . . . . . . . . . . . . . . . . . . . Net cash provided by operating activities . . . . . . . . . . . . . . . . Investing Activities Net cash paid in business combinations . . . . . . . . . . . . . . . . . . . . . . . . . Net cash provided by investing activities . . . . . . . . . . . . . . . . Financing Activities Preferred stock dividends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Common stock dividends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Repayment of junior subordinated debentures. . . . . . . . . . . . . . . . . . . . Cash settlement of acquired equity awards . . . . . . . . . . . . . . . . . . . . . . Purchase and retirement of common stock . . . . . . . . . . . . . . . . . . . . . . Proceeds from exercise of stock options . . . . . . . . . . . . . . . . . . . . . . . . Excess tax benefit associated with share-based compensation . . . . . . . Net cash used in financing activities . . . . . . . . . . . . . . . . . . . . Increase (decrease) in cash and cash equivalents. . . . . . Cash and cash equivalents at beginning of year. . . . . . . . . . . . . . . . . . . Cash and cash equivalents at end of year. . . . . . . . . . . . . . . . . Supplemental disclosure of noncash investing and financing activities Years Ended December 31, 2017 2016 2015 (in thousands) $ 112,828 $ 104,866 $ 98,827 (49,656) 7,745 1,672 72,589 (580) (580) — (51,308) (6,186) (7,345) (2,299) 1,980 — (65,158) 6,851 2,447 ,298 $ (22,757) 5,009 (394) 86,724 — — (157) (88,677) — — (1,125) 1,349 344 (88,266) (1,542) 3,989 2,447 $ (33,058) 4,090 (3,170) 66,689 — — (137) (77,263) (8,248) — (906) 1,258 — (85,296) (18,607) 22,596 3,989 Share-based consideration issued in business combinations . . . . . . . . . $ 636,385 $ — $ — 108 27. Summary of Quarterly Financial Information (Unaudited) Quarterly financial information for the years ended December 31, 2017 and 2016 is summarized as follows: Fourth Quarter (1) Third Quarter (2) Second Quarter First Quarter Year Ended December 31, (in thousands, except per share amounts) 2017 Total interest income . . . . . . . . . . . . . . . . Total interest expense . . . . . . . . . . . . . . . Net interest income . . . . . . . . . . . . . Provision (recapture) for loan and lease losses. . . . . . . . . . . . . . . . . . . . . . Noninterest income . . . . . . . . . . . . . . . . . Noninterest expense . . . . . . . . . . . . . . . . Income before income taxes . . . . . . Provision for income taxes . . . . . . . . . . . Net income . . . . . . . . . . . . . . . . Per common share (3) Earnings (basic) . . . . . . . . . . . . . . . . Earnings (diluted). . . . . . . . . . . . . . . 2016 Total interest income . . . . . . . . . . . . . . . . Total interest expense . . . . . . . . . . . . . . . Net interest income . . . . . . . . . . . . . Provision for loan and lease losses . . . . . Noninterest income . . . . . . . . . . . . . . . . . Noninterest expense . . . . . . . . . . . . . . . . Income before income taxes . . . . . . Provision for income taxes . . . . . . . . . . . Net income . . . . . . . . . . . . . . . . Per common share (3) Earnings (basic) . . . . . . . . . . . . . . . . Earnings (diluted). . . . . . . . . . . . . . . $ $ $ $ $ $ $ $ 108,841 2,617 106,224 3,327 85,627 40,851 25,123 15,728 0.23 0.23 86,734 997 85,737 18 65,014 43,035 12,317 30,718 0.53 0.53 $ $ $ $ $ $ $ $ 90,303 1,374 88,929 (648) 37,067 67,537 59,107 18,338 40,769 0.70 0.70 86,758 1,186 85,572 1,866 23,166 67,264 39,608 12,124 27,484 0.47 0.47 $ $ $ $ $ $ $ $ 87,786 1,625 86,161 3,177 24,135 68,867 38,252 11,120 27,132 0.47 0.47 83,303 1,163 82,140 3,640 21,940 63,790 36,650 11,245 25,405 0.44 0.44 $ $ $ $ $ $ $ $ 87,816 1,141 86,675 2,775 24,859 68,986 39,773 10,574 29,199 0.50 0.50 81,174 1,004 80,170 5,254 20,646 65,074 30,488 9,229 21,259 0.37 0.37 $ $ $ $ $ $ $ $ 374,746 6,757 367,989 8,631 109,642 291,017 177,983 65,155 112,828 1.86 1.86 337,969 4,350 333,619 10,778 88,082 261,142 149,781 44,915 104,866 1.81 1.81 __________ (1) During the fourth quarter of 2017, Columbia acquired Pacific Continental Corporation and also recorded a charge through provision for income taxes related to the re-measurement of our deferred tax assets pursuant to the newly enacted Tax Cuts and Jobs Act. See Note 2, “Business Combinations” for further information regarding this acquisition. See Note 24, “Income Tax” for further information regarding the re-measurement of our deferred tax assets. (2) During the third quarter of 2017, Columbia sold its merchant card services portfolio. See Note 1, “Summary of Significant Accounting Policies” for further information regarding this transaction. (3) Due to averaging of shares, quarterly earnings per share may not add up to the totals reported for the full year. 28. Subsequent Events On January 8, 2018, the Company redeemed the remaining $8.2 million junior subordinated debentures. 109 ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FINANCIAL DISCLOSURE TT ON ACCOUNTING AND None. ITEM 9A. CONTROLS AND PROCEDURES Evaluation of Disclosure Controls and Procedures An evaluation was carried out under the supervision and with the participation of the Company’s management, including ff (“CEO”) and Chief Financial Officer the Chief Executive Officer procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934). Based on that evaluation, the CEO and CFO have concluded that as of the end of the period covered by this report, our disclosure controls and procedures are effective in ensuring that the information required to be disclosed by us in the reports we file or submit under the Securities ff Exchange Act of 1934 is (i) accumulated and communicated to our management (including the CEO and CFO) to allow timely decisions regarding required disclosure, and (ii) recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. of our disclosure controls and (“CFO”), of the effectiveness ff ff Internal Control Over Financial Reporting Management’s Annual Report On Internal Controlrr Over Financial Reporting The Company’s management is responsible for establishing and maintaining adequate internal control over financial reporting. The internal control system has been designed to provide reasonable assurance to the Company’s management and board of directors regarding the preparation and fair presentation of the Company’s published financial statements. Internal control over financial reporting includes maintaining records that in reasonable detail accurately and fairly reflect the Company’s transactions; providing reasonable assurance that transactions are recorded as necessary for preparation of the Company’s financial statements; providing reasonable assurance that receipts and expenditures are made in accordance with management authorization; and providing reasonable assurance that unauthorized acquisition, use or disposition of company assets that could have a material effect basis. Because of its inherent limitations, internal control over financial reporting is not intended to provide absolute assurance that a misstatement of the Company’s financial statements would be prevented or detected. on the Company’s financial statements would be prevented or detected on a timely ff Management has evaluated the effectiveness ff of its internal control over financial reporting as of December 31, 2017 based on the control criteria established in a report entitled Internal Control-Integrated Committee of Sponsoring Organizations of the Treadway Commission. Management excluded from its assessment the internal control over financial reporting at Pacific Continental, which was acquired on November 1, 2017 and whose financial data and results constituted, of the consolidated financial statement amounts, approximately 23% of loans (net of allowance for loan losses), 20% of deposits, 23% of total assets and 4% of net interest income as of and for the year ended December 31, 2017. Framework (2013), issued by the rr Based on such evaluation, management has concluded that the Company’s internal control over financial reporting is effective ff 13a-15(f) and 15d-15(f) of the Exchange Act) during our most recently completed fiscal quarter that materially affected reasonably likely to materially affect as of December 31, 2017. There were no changes in our internal control over financial reporting (as defined in Rules or are internal control over financial reporting. ff ff Our independent registered public accounting firm has issued an attestation report on our internal control over financial reporting, which appears in this annual report on Form 10-K. 110 REPORTRR OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the shareholders and Board of Directors of Columbia Banking System, Inc. Opinion on Internal Control over Financial Reporting We have audited the internal control over financial reporting of Columbia Banking System, Inc. and its subsidiaries (the “Company”) as of December 31, 2017, based on criteria established in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Because management’s assessment and our audit were conducted to meet the reporting requirements of Section 112 of the Federal Deposit Insurance Corporation Improvement Act (FDICIA), management’s assessment and our audit of the Company’s internal control over financial reporting included controls over the preparation of the schedules equivalent to the basic financial statements in accordance with the instructions for the Federal Financial Institutions Examination Council Instructions for Consolidated Reports of Condition and Income for Schedules RC, RI, and RI-A. In our opinion, the Company maintained, in all material respects, effective control over financial reporting as of December 31, 2017, based on the criteria established in Internal Control—Integrated Framework (2013) issued by the COSO. internal rr rr ff We have not examined and, accordingly,yy we do not express an opinion or any other form of assurance on management’s statement referring to compliance with laws and regulations. We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 2017 of the Company and our report dated February 28, 2018 expressed an unqualified opinion on those financial statements. Basis for Opinion The Company’s management is responsible for maintaining effective ff internal control over financial reporting and for its ff of internal control over financial reporting, included in the accompanying Management’s assessment of the effectiveness Annual Report On Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB. We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion. internal control over financial reporting was of internal ff ff As described in Management’s Annual Report on Internal Control Over Financial Reporting, management excluded from its assessment the internal control over financial reporting at Pacific Continental Corporation (“Pacific Continental”), the parent of Pacific Continental Bank, which was acquired on November 1, 2017 and whose financial data and results constituted, of the consolidated financial statement amounts, approximately 23% of loans (net of allowance for loan losses), 20% of deposits, 23% of total assets and 4% of net interest income as of and for the year ended December 31, 2017. Accordingly,yy our audit did not include the internal control over financial reporting at Pacific Continental. 111 Definition and Limitations of Internal Control over Financial Reporting A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements. ff Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of the effectiveness inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. to future periods are subject to the risk that the controls may become ff /s/ Deloitte & Touche LLP February 28, 2018 Seattle, Washington 112 ITEM 9B. OTHER INFORMATION AA None. 113 ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATEAA GOVERNANCE PART III Information regarding “Directors, Executive Officers and Corporate Governance” will be set forth in the Company’s 2018 Annual Proxy Statement (the “Proxy Statement”), which will be filed with the SEC within 120 days of the end of our 2017 fiscal year and is incorporated herein by reference. ff ITEM 11. EXECUTIVE COMPENSATION AA Information regarding “Executive Compensation” will be set forth in the Proxy Statement and is incorporated herein by reference. ITEM 12. SECURITY OWNERSHIP OF CERTARR IN BENEFICIAL OWNERS AND MANAGEMENT AND RELATEDAA STOCKHOLDER MATTERS AA Information regarding “Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters” will be set forth in the Proxy Statement and is incorporated herein by reference. Information relating to securities authorized for issuance under the Company’s equity compensation plans is included in Part II of this Annual Report on Form 10-K under “Item 5. Market for Registrant’s Common Equity,yy Related Stockholder Matters and Issuer Purchases of Equity Securities.” ITEM 13. AA CERTARR IN RELATIONSHIPS INDEPENDENCE AND RELATEDAA TRANSACTIONS, AND DIRECTOR Information regarding “Certain Relationships and Related Transactions, and Director Independence” will be set forth in the Proxy Statement and is incorporated herein by reference. ITEM 14. PRINCIPALPP ACCOUNTING FEES AND SERVICES RR Information regarding “Principal Accounting Fees and Services” will be set forth in the Proxy Statement and is incorporated herein by reference. 114 ITEM 15. EXHIBITS, FINANCIAL STATTT EMENT SCHEDULES (a)(1) Financial Statements: PART IV The Consolidated Financial Statements and related documents set forth in “Item 8. Financial Statements and Supplementary Data” of this report are filed as part of this report. (2) Financial Statements Schedules: All other schedules to the Consolidated Financial Statements required by Regulation S-X are omitted because they are not applicable, not material or because the information is included in the Consolidated Financial Statements and related notes in “Item 8. Financial Statements and Supplementary Data” of this report. (3) Exhibits: The response to this portion of Item 15 is submitted as a separate section of this report appearing immediately following the signature page and entitled “Index to Exhibits.” ITEM 16. FORM 10-K SUMMARYRR None. 115 Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, on the 28th day of February 2018. AA SIGNATURES COLUMBIA BANKING SYSTEM, INC. (Registrant) By: /s/ HADLEY S. ROBBINS Hadley S. Robbins President and Chief Executive Officer Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities indicated, on the 28th day of February 2018. Principal Executive Officer: ff By: /s/ HADLEY S. ROBBINS Hadley S. Robbins President and Chief Executive Officer Principal Financial Officer: ff By: /s/ CLINT E. STEIN Clint E. Stein Executive Vice President and Chief Financial Officer Principal Accounting Officer: ff By: /s/ BARRYRR S. RAYAA Barry S. Ray Senior Vice President and Chief Accounting Officer Hadley S. Robbins, pursuant to a power of attorney that is being filed with the Annual Report on Form 10-K, has signed this report on February 28, 2018 as attorney in fact for the following directors who constitute a majority of the board of directors. [David A. Dietzler] [Craig D. Eerkes] [Ford Elsaesser] [Mark A. Finkelstein] [John P. Folsom] [Eric S. Forrest] [Thomas M. Hulbert] /s/ HADLEY S. ROBBINS Hadley S. Robbins Attorney-in-fact February 28, 2018 [Michelle M. Lantow] [Randal Lund] [S. Mae Fujita Numata] [Elizabeth W. Seaton] [Janine Terrano] [WilliamW T. Weyerhaeuser] 116 Exhibit No. 2.1 * 3.1 3.2 3.3 3.4 3.5 4.1 4.2 INDEX TO EXHIBITS Exhibit Agreement and Plan of Merger, by and among Columbia Banking System, Inc., Pacific Continental Corporation and Coast Merger Sub, Inc., dated January 9 2017 (1) Amended and Restated Articles of Incorporation (2) Articles of Amendment of the Amended and Restated Articles of Incorporation (3) Articles of Amendment of the Amended and Restated Articles of Incorporation (4) Articles of Amendment of the Amended and Restated Articles of Incorporation (5) Amended and Restated Bylaws (6) Specimen of common stock certificate (7) Pursuant to Item 601(b) (4) (iii) (A) of Regulation S-K, copies of instruments defining the rights of holders of long-term debt and preferred securities are not filed. The Company agrees to furnish a copy thereof to the Securities and Exchange Commission upon request. 10.1** Amended and Restated Stock Option and Equity Compensation Plan (8) 10.2** Form of Stock Option Agreement (9) 10.3** Form of Restricted Stock Agreement (9) 10.4** Form of Stock Appreciation Right Agreement (9) 10.5** Form of Restricted Stock Unit Agreement (9) 10.6** Form of Long-TermTT Restricted Stock Agreement (10) 10.7** Amended and Restated Employee Stock Purchase Plan (11) 10.8 Office ff (12) Lease, dated as of December 15, 1999, between the Company and Haub Brothers Enterprises Trust rr 10.9** Employment Agreement between the Bank, the Company and Hadley S. Robbins effective ff June 28, 2017 (13) 10.10** Employment Agreement between the Bank, the Company and Melanie J. Dressel effective (14) ff August 1, 2004 10.11** Amendment to Employment Agreement between the Bank, the Company and Melanie J. Dressel effective February 1, 2009 (15) ff 10.12** Amendment to Employment Agreement effective Melanie J. Dressel (16) ff December 31, 2008 among the Bank, the Company and 10.13** 10.14** 10.15** 10.16** Amendment to Employment Agreement effective Melanie J. Dressel (17) ff February 27, 2015 among the Bank, the Company and Change in Control Agreement between the Bank and Kent L. Roberts dated December 4, 2011 (18) Change in Control Agreement between the Bank and Mark W. Nelson dated as of October 23, 2012 (19) Change in Control Agreement between the Bank and Clint E. Stein dated as of October 24, 2012 (19) 117 Exhibit No. Exhibit INDEX TO EXHIBITS, CONTINUED 10.17** Form of Long-TermTT Mr. Folsom, Mr. Hulbert, Mr. Matson, Mr. Rodman, Mr. Weyerhaeuser and Mr. Will (20) Care Agreement between the Bank, the Company,yy and each of the following directors: 10.18** Second Amended and Restated Executive Supplemental Compensation Agreements dated as of May 27, 2009 among the Company,yy Columbia State Bank and Melanie J. Dressel (21) 10.19** Second Amended and Restated Executive Supplemental Compensation Agreements dated as of May 27, 2009 among the Company,yy Columbia State Bank and Mark W. Nelson (21) 10.20** First Amendment to the Second Amended and Restated Executive Supplemental Compensation Agreement, by and between the Bank and Melanie J. Dressel, effective February 27, 2015 (17) ff 10.21** Amended and Restated 401 Plus Plan (Deferred Compensation Plan) dated December 14, 2011 for directors and key employees (18) 10.22** Form of Supplemental Compensation Agreement between the Bank and Mssrs. Andrew L. McDonald and Clint E. Stein, respectively (9) 10.23** Form of Indemnification Agreement between the Company and its directors (16) 10.24** 10.25** First Amended and Restated Columbia State Bank Supplemental Executive Retirement Plan Agreement, by and between the Bank and Clint E. Stein, effective February 27, 2015 (17) ff First Amended and Restated Columbia State Bank Supplemental Executive Retirement Plan Agreement, by and between the Bank and Andrew L. McDonald, effective February 27, 2015 (17) ff 10.26** Change in Control Agreement between the Bank and Hadley S. Robbins dated February 4, 2014 (effective March 1, 2014) (22) ff 10.27** West Coast Bancorp 2002 Stock Incentive Plan (23) 10.28** West Coast Bancorp 2012 Omnibus Incentive Plan (23) 10.29** 2014 Stock Option and Equity Compensation Plan (24) 10.30** 2014 Form of Restricted Stock Agreement (24) 10.31** 2014 Form of Stock Option Agreement (24) 10.32** 2014 Form of Stock Appreciation Rights Agreement (24) 10.33** 2014 Form of Restricted Stock Unit Agreement (24) 10.34** 2014 Form of Cash Award Agreement (24) 10.35** First Amended and Restated Columbia State Bank Supplemental Executive Retirement Plan Agreement, by and between the Bank and David C. Lawson, effective February 27, 2015 (17) ff 10.36** Change in Control Agreement between the Bank and Andrew L. McDonald dated June 1, 2014 (25) 10.37** Employment Agreement among the Bank, the Company and Hadley S. Robbins dated September 25, 2012 (26) 10.38** Change in Control Agreement between the Bank and David C. Lawson, dated September 25, 2013 (26) 118 Exhibit No. Exhibit INDEX TO EXHIBITS, CONTINUED First Amendment to the Restated and Amended West Coast Bank Supplemental Executive Retirement Plan Agreement, by and among the Company (as successor-in-interest to the West Coast Bancorp), Bank (as successor-in-interest to West Coast Bank) and Hadley S. Robbins, effective February 27, 2015 (17) ff Columbia State Bank Supplemental Executive Retirement Plan Agreement, by and between the Bank and Hadley S. Robbins, effective February 27, 2015 (17) ff Columbia State Bank Supplemental Executive Retirement Plan Agreement, by and between the Bank and Kumi Baruffi,ff February 27, 2015 (17) ff effective 10.39** 10.40** 10.41** 10.42** Columbia State Bank Endorsement Method Split Dollar Agreement (Base Salary Benefit), dated October 30, 2015, by and between Columbia State Bank and Melanie J. Dressel (27) 10.43** Columbia State Bank Endorsement Method Split Dollar Agreement (SERP Benefit), dated October 30, 2015 by and between Columbia State Bank and Melanie J. Dressel (27) 10.44** Change in Control Agreement between the Bank and Kumi Baruffiff dated September 1, 2014 (28) 10.45** Amended and Restated Columbia Banking System, Inc. 2005 401 Plus Plan (Deferred Compensation Plan), dated October 26, 2016 for directors and key employees (29) 10.46** Columbia Banking System, Inc. 2016 401 Plus Plan (Deferred Compensation Plan), dated October 26, 2016 for directors and key employees (29) 10.47**+ 10.48**+ 10.49**+ 10.50**+ 10.51**+ 12+ 14 21+ 23+ 24+ First Amendment to the Columbia State Bank Supplemental Executive Retirement Plan Agreement, by and between the Bank and Kumi Baruffi,ff November 15, 2017 ff effective First Amendment to the First Amended and Restated Columbia State Bank Supplemental Executive Retirement Plan Agreement, by and between the Bank and David Lawson, effective November 15, 2017 ff First Amendment to the First Amended and Restated Columbia State Bank Supplemental Executive Retirement Plan Agreement, by and between the Bank and Andrew L. McDonald, effective 2017 ff November 15, First Amendment to the Columbia State Bank Supplemental Executive Retirement Plan Agreement, by and between the Bank and Hadley S. Robbins, effective November 15, 2017 ff First Amendment to the First Amended and Restated Columbia State Bank Supplemental Executive Retirement Plan Agreement, by and between the Bank and Clinton E. Stein, effective November 15, 2017 ff Statement Re: Computation of Ratio of Earnings to Fixed Charges Code of Ethics (28) Subsidiaries of the Company Consent of Deloitte & Touche LLP Power of Attorney 31.1+ Certification of Chief Executive Officer ff Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 31.2+ Certification of Chief Financial Officer ff Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 119 INDEX TO EXHIBITS, CONTINUED Exhibit No. 32+ Exhibit Certification Filed Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes- Oxley Act of 2002 The following financial information from Columbia Banking System, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2017 is formatted in XBRL: (i) Audited Consolidated Balance Sheets, (ii) Audited Consolidated Statements of Income, (iii) Audited Consolidated Statements of Comprehensive Income, (iv) Audited Consolidated Statements of Changes in Shareholders’ Equity,yy (v) Audited Consolidated Statements of Cash Flows, and (vi) Notes to Audited Consolidated Financial Statements. 101+ __________ (1) (2) (3) (4) (5) (6) (7) (8) (9) Incorporated by reference to Exhibit 2.1 of the Company’s Current Report on Form 8-K filed January 10, 2017 Incorporated by reference to Exhibit 3.1 of the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2005 Incorporated by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K filed November 21, 2008 Incorporated by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K filed April 2, 2013 Incorporated by reference to Exhibit 4.4 of the Company’s S-3 Registration Statement (File No. 333-206125) filed August 6, 2015 Incorporated by reference to Exhibit 3.2 of the Company’s Current Report on Form 8-K filed on February 2, 2010 Incorporated by reference to Exhibit 4.3 of the Company’s S-3 Registration Statement (File No. 333-156350) filed December 19, 2008 Incorporated by reference to Exhibit 99.1 of the Company’s S-8 Registration Statement (File No. 333-160370) filed July 1, 2009 Incorporated by reference to Exhibits 10.2-10.5 and 10.16 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2007 (10) Incorporated by reference to Exhibit 10.1 of the Company’s Current Report on Form 8-K filed January 5, 2010 (11) Incorporated by reference to Exhibit 10.7 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2010 (12) Incorporated by reference to Exhibit 10.5 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2000 (13) Incorporated by reference to Exhibits 10.1 of the Company’s 8-K filed June 29, 2017 (14) Incorporated by reference to Exhibit 10.2 of the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2004 (15) Incorporated by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K filed February 19, 2009 (16) Incorporated by reference to Exhibits 10.2 and 10.4 of the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2009 (17) Incorporated by reference to Exhibits 10.1-10.8 of the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2015 (18) Incorporated by reference to Exhibits 10.14 and 10.15 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2011 (19) Incorporated by reference to Exhibits 10.1 and 10.2 of the Company’s Current Report on Form 8-K filed October 29, 2012 (20) Incorporated by reference to Exhibit 10.3 of the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2001 (21) Incorporated by reference to Exhibits 10.1 and 10.3 of the Company’s Current Report on Form 8-K filed on June 2, 2009 (22) Incorporated by reference to Exhibit 10.23 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2013 (23) Incorporated by reference to Exhibits 99.1 and 99.2 of the Company’s S-8 Registration Statement (File No. 333-187690) filed April 2, 2013 (24) Incorporated by reference to Exhibits 99.1-99.6 of the Company’s S-8 Registration Statement (File No. 333-195456) filed April 23, 2014 (25) Incorporated by reference to Exhibit 10.1 of the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2014 (26) Incorporated by reference to Exhibits 10.33 and 10.34 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 (27) Incorporated by reference to Exhibits 10.1 and 10.2 of the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2015 (28) (29) Incorporated by reference to Exhibit 10.42 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 Incorporated by reference to Exhibits 10.1 and 10.2 of the Company’s Current Report on Form 8-K filed October 28, 2016 (30) Incorporated by reference to Exhibit 14 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2003 * The schedules to this agreement have been omitted in accordance with Item 601(b)(2) of Regulation S-K. A copy of any omitted schedule or exhibit will be furnished supplementally to the SEC upon request; provided, however, that the registrant may request confidential treatment of omitted items. ** Management contract or compensatory plan or arrangement + Filed herewith 120 WASHINGTON OREGON IDAHO A combined network of more than 145 branches. INDEPENDENT AUDITORS Deloitte & Touche, LLP TRANSFER AGENT AND REGISTRAR Broadridge Corporate Issuer Solutions FINANCIAL INFORMATION Columbia news and financial results are available through the Internet and mail. REGULATORY & SECURITIES COUNSEL Sullivan & Cromwell, LLP STOCK LISTING The Company’s common stock trades on the Nasdaq Global Select market under the symbol: COLB INTERNET For information about Columbia Banking System, Inc., including news and financial results, product information and service locations, access our home page at www.ColumbiaBank.com. You can also view or retrieve copies of Columbia’s financial reports on the Internet by connecting to www.sec.gov. Immediate access to the Company’s quarterly earnings news releases via the Internet is provided by PR Newswire at www.prnewswire.com 1301 A Street, Tacoma, WA 98402 253-305-1900 / 1-800-305-1905 ColumbiaBank.com 1301 A Street, Tacoma, WA 98402 253-305-1900 / 800-305-1905 ColumbiaBank.com Member FDIC