10-Q 1 colb1q2017form10-q.htm 10-Q

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
________________________________________________________
FORM 10-Q
________________________________________________________
(Mark One)

☒ | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2017.

☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to .
Commission File Number 0-20288
________________________________________________________
COLUMBIA BANKING SYSTEM, INC.
(Exact name of registrant as specified in its charter)
________________________________________________________

Washington |  | 91-1422237
(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification Number)
1301 A Street Tacoma, Washington |  | 98402-2156
(Address of principal executive offices) |  | (Zip Code)

(253) 305-1900
(Issuer’s telephone number, including area code)
(Former name, former address and former fiscal year, if changed since last report)________________________________________________________
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, 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 whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer |  | ☒ |  | Accelerated filer |  | ☐
Non-accelerated filer |  | ☐ |  | Smaller reporting company |  | ☐
|  |  |  | Emerging growth company |  | ☐

If an emerging growth company, 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 number of shares of common stock outstanding at April 30, 2017 was 58,343,431.

TABLE OF CONTENTS

|  | Page
| PART I — FINANCIAL INFORMATION |
Item 1. | Financial Statements (unaudited) |
| Consolidated Balance Sheets - March 31, 2017 and December 31, 2016 | 1
| Consolidated Statements of Income - three months ended March 31, 2017 and 2016 | 2
| Consolidated Statements of Comprehensive Income - three months ended March 31, 2017 and 2016 | 3
| Consolidated Statements of Changes in Shareholders’ Equity - three months ended March 31, 2017 and 2016 | 4
| Consolidated Statements of Cash Flows - three months ended March 31, 2017 and 2016 | 5
| Notes to Unaudited Consolidated Financial Statements | 7
Item 2. | Management’s Discussion and Analysis of Financial Condition and Results of Operations | 35
Item 3. | Quantitative and Qualitative Disclosures about Market Risk | 50
Item 4. | Controls and Procedures | 50
| PART II — OTHER INFORMATION |
Item 1. | Legal Proceedings | 51
Item 1A. | Risk Factors | 51
Item 2. | Unregistered Sales of Equity Securities and Use of Proceeds | 51
Item 3. | Defaults Upon Senior Securities | 51
Item 4. | Mine Safety Disclosures | 51
Item 5. | Other Information | 51
Item 6. | Exhibits | 52
| Signatures | 53

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PART I - FINANCIAL INFORMATION
Item 1. FINANCIAL STATEMENTS
CONSOLIDATED BALANCE SHEETS
Columbia Banking System, Inc.
(Unaudited)

|  |  |  |  | March 31, 2017 |  | December 31, 2016
ASSETS |  | (in thousands)
Cash and due from banks |  | $ | 169,697 |  |  | $ | 193,038 |
Interest-earning deposits with banks |  | 13,124 |  |  | 31,200 |
Total cash and cash equivalents |  | 182,821 |  |  | 224,238 |
Securities available for sale at fair value (amortized cost of $2,349,149 and $2,299,037, respectively) |  | 2,331,359 |  |  | 2,278,577 |
Federal Home Loan Bank stock at cost |  | 10,600 |  |  | 10,240 |
Loans held for sale |  | 3,245 |  |  | 5,846 |
Loans, net of unearned income of ($32,212) and ($33,718), respectively |  | 6,228,136 |  |  | 6,213,423 |
Less: allowance for loan and lease losses |  | 71,021 |  |  | 70,043 |
Loans, net |  | 6,157,115 |  |  | 6,143,380 |
FDIC loss-sharing asset |  | 3,239 |  |  | 3,535 |
Interest receivable |  | 31,345 |  |  | 30,074 |
Premises and equipment, net |  | 148,541 |  |  | 150,342 |
Other real estate owned |  | 4,519 |  |  | 5,998 |
Goodwill |  | 382,762 |  |  | 382,762 |
Other intangible assets, net |  | 16,282 |  |  | 17,631 |
Other assets |  | 255,444 |  |  | 256,984 |
Total assets |  | $ | 9,527,272 |  |  | $ | 9,509,607 |
LIABILITIES AND SHAREHOLDERS’ EQUITY |  |  |  |
Deposits: |  |  |  |  |  |  |
Noninterest-bearing |  | $ | 3,958,106 |  |  | $ | 3,944,495 |
Interest-bearing |  | 4,130,721 |  |  | 4,114,920 |
Total deposits |  | 8,088,827 |  |  | 8,059,415 |
Federal Home Loan Bank advances |  | 15,483 |  |  | 6,493 |
Securities sold under agreements to repurchase |  | 46,914 |  |  | 80,822 |
Other liabilities |  | 100,705 |  |  | 111,865 |
Total liabilities |  | 8,251,929 |  |  | 8,258,595 |
Commitments and contingent liabilities (Note 10) |  |  |  |
Shareholders’ equity: |  |  |  |  |  |  |
| March 31, 2017 |  | December 31, 2016 |  |  |  |
Preferred stock (no par value) | (in thousands) |  |  |  |
Authorized shares | 2,000 |  |  | 2,000 |  |  |  |  |
Issued and outstanding | — |  |  | 9 |  |  | — |  |  | 2,217 |
Common stock (no par value) |  |  |  |  |  |  |
Authorized shares | 115,000 |  |  | 115,000 |  |  |  |  |
Issued and outstanding | 58,329 |  |  | 58,042 |  |  | 999,702 |  |  | 995,837 |
Retained earnings |  | 288,247 |  |  | 271,957 |
Accumulated other comprehensive loss |  | (12,606 | ) |  | (18,999 | )
Total shareholders’ equity |  | 1,275,343 |  |  | 1,251,012 |
Total liabilities and shareholders’ equity |  | $ | 9,527,272 |  |  | $ | 9,509,607 |

See accompanying Notes to unaudited Consolidated Financial Statements.
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CONSOLIDATED STATEMENTS OF INCOME
Columbia Banking System, Inc.
(Unaudited)

|  | Three Months Ended
|  | March 31,
|  | 2017 |  | 2016
|  | (in thousands except per share amounts)
Interest Income |  |  |  |
Loans |  | $ | 74,120 |  |  | $ | 70,316 |
Taxable securities |  | 10,986 |  |  | 8,017 |
Tax-exempt securities |  | 2,691 |  |  | 2,803 |
Deposits in banks |  | 19 |  |  | 38 |
Total interest income |  | 87,816 |  |  | 81,174 |
Interest Expense |  |  |  |
Deposits |  | 787 |  |  | 742 |
Federal Home Loan Bank advances |  | 225 |  |  | 124 |
Other borrowings |  | 129 |  |  | 138 |
Total interest expense |  | 1,141 |  |  | 1,004 |
Net Interest Income |  | 86,675 |  |  | 80,170 |
Provision for loan and lease losses |  | 2,775 |  |  | 5,254 |
Net interest income after provision for loan and lease losses |  | 83,900 |  |  | 74,916 |
Noninterest Income |  |  |  |
Deposit account and treasury management fees |  | 7,287 |  |  | 6,989 |
Card revenue |  | 5,723 |  |  | 5,652 |
Financial services and trust revenue |  | 2,839 |  |  | 2,821 |
Loan revenue |  | 3,593 |  |  | 2,262 |
Merchant processing revenue |  | 2,019 |  |  | 2,102 |
Bank owned life insurance |  | 1,280 |  |  | 1,116 |
Investment securities gains |  | — |  |  | 373 |
Change in FDIC loss-sharing asset |  | (274 | ) |  | (1,103 | )
Other |  | 2,392 |  |  | 434 |
Total noninterest income |  | 24,859 |  |  | 20,646 |
Noninterest Expense |  |  |  |
Compensation and employee benefits |  | 40,825 |  |  | 36,319 |
Occupancy |  | 7,191 |  |  | 10,173 |
Merchant processing expense |  | 1,049 |  |  | 1,033 |
Advertising and promotion |  | 817 |  |  | 842 |
Data processing |  | 4,208 |  |  | 4,146 |
Legal and professional fees |  | 3,369 |  |  | 1,325 |
Taxes, licenses and fees |  | 1,241 |  |  | 1,290 |
Regulatory premiums |  | 776 |  |  | 1,141 |
Net cost of operation of other real estate owned |  | 152 |  |  | 104 |
Amortization of intangibles |  | 1,349 |  |  | 1,583 |
Other |  | 8,009 |  |  | 7,118 |
Total noninterest expense |  | 68,986 |  |  | 65,074 |
Income before income taxes |  | 39,773 |  |  | 30,488 |
Income tax provision |  | 10,574 |  |  | 9,229 |
Net Income |  | $ | 29,199 |  |  | $ | 21,259 |
Earnings per common share |  |  |  |
Basic |  | $ | 0.50 |  |  | $ | 0.37 |
Diluted |  | $ | 0.50 |  |  | $ | 0.37 |
Dividends paid per common share |  | $ | 0.22 |  |  | $ | 0.38 |
Weighted average number of common shares outstanding |  | 57,388 |  |  | 57,114 |
Weighted average number of diluted common shares outstanding |  | 57,394 |  |  | 57,125 |

See accompanying Notes to unaudited Consolidated Financial Statements.
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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Columbia Banking System, Inc.
(Unaudited)

|  | Three Months Ended
|  | March 31,
|  | 2017 |  | 2016
|  | (in thousands)
Net income |  | $ | 29,199 |  |  | $ | 21,259 |
Other comprehensive income (loss), net of tax: |  |  |  |
Unrealized gain from securities: |  |  |  |
Net unrealized holding gain from available for sale securities arising during the period, net of tax of ($968) and ($10,686) |  | 1,702 |  |  | 18,770 |
Reclassification adjustment of net gain from sale of available for sale securities included in income, net of tax of $0 and $135 |  | — |  |  | (238 | )
Net unrealized gain from securities, net of reclassification adjustment |  | 1,702 |  |  | 18,532 |
Pension plan liability adjustment: |  |  |  |
Reduction in unfunded defined benefit plan liability during the period, net of tax of ($2,622) and $0 |  | 4,604 |  |  | — |
Amortization of unrecognized net actuarial loss included in net periodic pension cost, net of tax of ($49) and ($61) |  | 87 |  |  | 106 |
Pension plan liability adjustment, net |  | 4,691 |  |  | 106 |
Other comprehensive income |  | 6,393 |  |  | 18,638 |
Total comprehensive income |  | $ | 35,592 |  |  | $ | 39,897 |

See accompanying Notes to unaudited Consolidated Financial Statements.
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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY
Columbia Banking System, Inc.
(Unaudited)

|  | Preferred Stock |  | Common Stock |  | Retained Earnings |  | Accumulated Other Comprehensive Income (Loss) |  | Total Shareholders’ Equity
|  | Number of Shares |  | Amount |  | Number of Shares |  | Amount |
|  | (in thousands)
Balance at January 1, 2017 |  | 9 |  |  | $ | 2,217 |  |  | 58,042 |  |  | $ | 995,837 |  |  | $ | 271,957 |  |  | $ | (18,999 | ) |  | $ | 1,251,012 |
Adjustment to opening retained earnings pursuant to adoption of ASU 2016-09 |  | — |  |  | — |  |  | — |  |  | 184 |  |  | (117 | ) |  | — |  |  | 67 |
Net income |  | — |  |  | — |  |  | — |  |  | — |  |  | 29,199 |  |  | — |  |  | 29,199 |
Other comprehensive income |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 6,393 |  |  | 6,393 |
Issuance of common stock - stock option and other plans |  | — |  |  | — |  |  | 28 |  |  | 1,145 |  |  | — |  |  | — |  |  | 1,145 |
Issuance of common stock - restricted stock awards, net of canceled awards |  | — |  |  | — |  |  | 207 |  |  | 2,358 |  |  | — |  |  | — |  |  | 2,358 |
Preferred stock conversion to common stock |  | (9 | ) |  | (2,217 | ) |  | 102 |  |  | 2,217 |  |  | — |  |  | — |  |  | — |
Purchase and retirement of common stock |  | — |  |  | — |  |  | (50 | ) |  | (2,039 | ) |  | — |  |  | — |  |  | (2,039 | )
Cash dividends paid on common stock |  | — |  |  | — |  |  | — |  |  | — |  |  | (12,792 | ) |  | — |  |  | (12,792 | )
Balance at March 31, 2017 |  | — |  |  | $ | — |  |  | 58,329 |  |  | $ | 999,702 |  |  | $ | 288,247 |  |  | $ | (12,606 | ) |  | $ | 1,275,343 |
Balance at January 1, 2016 |  | 9 |  |  | $ | 2,217 |  |  | 57,724 |  |  | $ | 990,281 |  |  | $ | 255,925 |  |  | $ | (6,295 | ) |  | $ | 1,242,128 |
Net income |  | — |  |  | — |  |  | — |  |  | — |  |  | 21,259 |  |  | — |  |  | 21,259 |
Other comprehensive income |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 18,638 |  |  | 18,638 |
Issuance of common stock - stock option and other plans |  | — |  |  | — |  |  | 20 |  |  | 598 |  |  | — |  |  | — |  |  | 598 |
Issuance of common stock - restricted stock awards, net of canceled awards |  | — |  |  | — |  |  | 299 |  |  | 1,180 |  |  | — |  |  | — |  |  | 1,180 |
Purchase and retirement of common stock |  | — |  |  | — |  |  | (35 | ) |  | (1,033 | ) |  | — |  |  | — |  |  | (1,033 | )
Preferred dividends |  | — |  |  | — |  |  | — |  |  | — |  |  | (39 | ) |  | — |  |  | (39 | )
Cash dividends paid on common stock |  | — |  |  | — |  |  | — |  |  | — |  |  | (21,943 | ) |  | — |  |  | (21,943 | )
Balance at March 31, 2016 |  | 9 |  |  | $ | 2,217 |  |  | 58,008 |  |  | $ | 991,026 |  |  | $ | 255,202 |  |  | $ | 12,343 |  |  | $ | 1,260,788 |

See accompanying Notes to unaudited Consolidated Financial Statements.
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CONSOLIDATED STATEMENTS OF CASH FLOWS Columbia Banking System, Inc. (Unaudited)
|  | Three Months Ended March 31,
|  | 2017 |  | 2016
|  | (in thousands)
Cash Flows From Operating Activities |  |  |  |
Net income |  | $ | 29,199 |  |  | $ | 21,259 |
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |
Provision for loan and lease losses |  | 2,775 |  |  | 5,254 |
Stock-based compensation expense |  | 2,358 |  |  | 1,180 |
Depreciation, amortization and accretion |  | 6,074 |  |  | 10,798 |
Investment securities gains |  | — |  |  | (373 | )
Net realized loss on sale of premises and equipment, loans held for investment and other assets |  | 55 |  |  | 106 |
Net realized loss on sale and valuation adjustments of other real estate owned |  | 204 |  |  | 90 |
Originations of loans held for sale |  | (31,295 | ) |  | (19,174 | )
Proceeds from sales of loans held for sale |  | 33,896 |  |  | 20,002 |
Net change in: |  |  |  |
Interest receivable |  | (1,271 | ) |  | (1,427 | )
Interest payable |  | (9 | ) |  | (55 | )
Other assets |  | (2,164 | ) |  | (3,731 | )
Other liabilities |  | (3,841 | ) |  | (4,619 | )
Net cash provided by operating activities |  | 35,981 |  |  | 29,310 |
Cash Flows From Investing Activities |  |  |  |
Loans originated and acquired, net of principal collected |  | (21,936 | ) |  | (64,056 | )
Purchases of: |  |  |  |
Securities available for sale |  | (108,958 | ) |  | (95,686 | )
Premises and equipment |  | (336 | ) |  | (445 | )
Federal Home Loan Bank stock |  | (31,400 | ) |  | (10,520 | )
Proceeds from: |  |  |  |
FDIC reimbursement on loss-sharing asset |  | 26 |  |  | 258 |
Sales of securities available for sale |  | — |  |  | 38,876 |
Principal repayments and maturities of securities available for sale |  | 55,369 |  |  | 52,422 |
Sales of premises and equipment and loans held for investment |  | 6,893 |  |  | 1,911 |
Redemption of Federal Home Loan Bank stock |  | 31,040 |  |  | 13,001 |
Sales of other real estate and other personal property owned |  | 1,275 |  |  | 1,326 |
Payments to FDIC related to loss-sharing asset |  | (210 | ) |  | (611 | )
Net cash used in investing activities |  | (68,237 | ) |  | (63,524 | )
Cash Flows From Financing Activities |  |  |  |
Net increase in deposits |  | 29,433 |  |  | 158,120 |
Net decrease in sweep repurchase agreements |  | (33,908 | ) |  | (25,860 | )
Proceeds from: |  |  |  |
Federal Home Loan Bank advances |  | 785,000 |  |  | 165,000 |
Exercise of stock options |  | 1,145 |  |  | 598 |
Payments for: |  |  |  |
Repayment of Federal Home Loan Bank advances |  | (776,000 | ) |  | (227,000 | )
Common stock dividends |  | (12,792 | ) |  | (21,943 | )
Preferred stock dividends |  | — |  |  | (39 | )
Purchase and retirement of common stock |  | (2,039 | ) |  | (1,033 | )
Net cash (used in) provided by financing activities |  | (9,161 | ) |  | 47,843 |
Increase (decrease) in cash and cash equivalents |  | (41,417 | ) |  | 13,629 |
Cash and cash equivalents at beginning of period |  | 224,238 |  |  | 175,302 |
Cash and cash equivalents at end of period |  | $ | 182,821 |  |  | $ | 188,931 |

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CONSOLIDATED STATEMENTS OF CASH FLOWS, Continued Columbia Banking System, Inc. (Unaudited)
|  | Three Months Ended March 31,
|  | 2017 |  | 2016
|  | (in thousands)
Supplemental Information: |  |  |  |
Cash paid during the period for: |  |  |  |
Cash paid for interest |  | $ | 1,150 |  |  | $ | 1,059 |
Cash paid for income tax |  | $ | — |  |  | $ | 6,350 |
Non-cash investing and financing activities |  |  |  |
Loans transferred to other real estate owned |  | $ | — |  |  | $ | 105 |

See accompanying Notes to unaudited Consolidated Financial Statements.
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NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS
Columbia Banking System, Inc.

1. | Basis of Presentation and Significant Accounting Policies

Basis of Presentation
The interim unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with instructions to Form 10-Q and Article 10 of Regulation S-X. The Consolidated Financial Statements include the accounts of Columbia Banking System, Inc. (“we”, “our”, “Columbia” or the “Company”) and its subsidiaries, including its wholly owned banking subsidiary Columbia State Bank (“Columbia Bank” or the “Bank”) and Columbia Trust Company (“Columbia Trust”). All intercompany transactions and accounts have been eliminated in consolidation. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair statement of the results for the interim periods presented have been included. The results of operations for the three months ended March 31, 2017 are not necessarily indicative of results to be anticipated for the year ending December 31, 2017. The accompanying interim unaudited Consolidated Financial Statements should be read in conjunction with the financial statements and related notes contained in the Company’s 2016 Annual Report on Form 10-K.
Significant Accounting Policies
The significant accounting policies used in preparation of our Consolidated Financial Statements are disclosed in our 2016 Annual Report on Form 10-K. There have not been any changes in our significant accounting policies compared to those contained in our 2016 Form 10-K disclosure for the year ended December 31, 2016.

2. | Accounting Pronouncements Recently Issued

In March 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-08, Premium Amortization on Purchased Callable Debt Securities. The amendments included in this ASU change guidance on the amortization period of premiums on certain purchased callable debt securities. Specifically, the amendments shorten the premium amortization period to the earliest call date. The amendments in ASU 2017-08 are effective for fiscal years and interim periods within those years, beginning after December 15, 2018. Early adoption is permitted. The Company early adopted the amendments of ASU 2017-08 during the current quarter. The impact of the adoption of ASU 2017-08 to current period net income and opening retained earnings was not material.
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 Company does not expect the impact to its Consolidated Financial Statements to be material.
In June 2016, the FASB issued ASU 2016-13, Measurement of Credit 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, 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 for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and are required to be adopted through a modified retrospective approach, with a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the ASU is effective.
Currently, 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, 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, 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
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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 to Employee Share-Based 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 in the current quarter. 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 a current period income tax benefit of $1.2 million or $0.02 per diluted common share.
In February 2016, the FASB issued ASU 2016-02, Leases. The amendments included in this ASU create a new accounting 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 from the current lease accounting model, which does not require such lease liabilities and 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 for the first interim or annual period beginning after December 15, 2018. Early adoption is permitted. During 2016, the Company implemented a new lease administration application that allows the Company to readily measure future lease payment streams, which is an important component of the new lease accounting model. Significant implementation matters to be addressed by the Company include selecting either a third-party lease accounting application or internally-developing such an application, assessing the impact to its Consolidated Financial Statements and internal controls over financial reporting and documenting the new lease accounting process. See Note 17, “Commitments and Contingent Liabilities” to our 2016 Form 10-K, for more information regarding the minimum future payments related to our operating leases.
3. Securities
The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of securities available for sale:

|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
|  | (in thousands)
March 31, 2017 |  |  |  |  |  |  |  |
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations |  | $ | 1,506,914 |  |  | $ | 2,400 |  |  | $ | (22,816 | ) |  | $ | 1,486,498 |
State and municipal securities |  | 484,376 |  |  | 7,316 |  |  | (4,337 | ) |  | 487,355 |
U.S. government agency and government-sponsored enterprise securities |  | 352,323 |  |  | 1,241 |  |  | (1,381 | ) |  | 352,183 |
U.S. government securities |  | 252 |  |  | — |  |  | — |  |  | 252 |
Other securities |  | 5,284 |  |  | 60 |  |  | (273 | ) |  | 5,071 |
Total |  | $ | 2,349,149 |  |  | $ | 11,017 |  |  | $ | (28,807 | ) |  | $ | 2,331,359 |
December 31, 2016 |  |  |  |  |  |  |  |
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations |  | $ | 1,486,690 |  |  | $ | 2,760 |  |  | $ | (23,718 | ) |  | $ | 1,465,732 |
State and municipal securities |  | 473,914 |  |  | 6,343 |  |  | (5,197 | ) |  | 475,060 |
U.S. government agency and government-sponsored enterprise securities |  | 332,348 |  |  | 1,065 |  |  | (1,511 | ) |  | 331,902 |
U.S. government securities |  | 801 |  |  | — |  |  | (1 | ) |  | 800 |
Other securities |  | 5,284 |  |  | 63 |  |  | (264 | ) |  | 5,083 |
Total |  | $ | 2,299,037 |  |  | $ | 10,231 |  |  | $ | (30,691 | ) |  | $ | 2,278,577 |

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There were no proceeds from sales of securities available for sale for the three months ended March 31, 2017 and there were $38.9 million for the three months ended March 31, 2016. The following table provides the gross realized gains and losses on the sales of securities for the periods indicated:

|  | Three Months Ended
|  | March 31,
|  | 2017 |  | 2016
|  | (in thousands)
Gross realized gains |  | $ | — |  |  | $ | 373 |
Gross realized losses |  | — |  |  | — |
Net realized gains |  | $ | — |  |  | $ | 373 |

The scheduled contractual maturities of investment securities available for sale at March 31, 2017 are presented as follows:

|  | March 31, 2017
|  | Amortized Cost |  | Fair Value
|  | (in thousands)
Due within one year |  | $ | 53,518 |  |  | $ | 53,606 |
Due after one year through five years |  | 502,633 |  |  | 505,398 |
Due after five years through ten years |  | 731,123 |  |  | 724,361 |
Due after ten years |  | 1,056,591 |  |  | 1,042,923 |
Other securities with no stated maturity |  | 5,284 |  |  | 5,071 |
Total investment securities available-for-sale |  | $ | 2,349,149 |  |  | $ | 2,331,359 |

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:

|  | March 31, 2017
|  | (in thousands)
Washington and Oregon State to secure public deposits |  | $ | 228,794 |
Federal Reserve Bank to secure borrowings |  | 54,551 |
Other securities pledged |  | 125,954 |
Total securities pledged as collateral |  | $ | 409,299 |

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The following table shows 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 March 31, 2017 and December 31, 2016:

|  | Less than 12 Months |  | 12 Months or More |  | Total
|  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
|  | (in thousands)
March 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations |  | $ | 1,038,971 |  |  | $ | (17,020 | ) |  | $ | 155,846 |  |  | $ | (5,796 | ) |  | $ | 1,194,817 |  |  | $ | (22,816 | )
State and municipal securities |  | 162,860 |  |  | (4,249 | ) |  | 3,412 |  |  | (88 | ) |  | 166,272 |  |  | (4,337 | )
U.S. government agency and government-sponsored enterprise securities |  | 193,846 |  |  | (1,381 | ) |  | — |  |  | — |  |  | 193,846 |  |  | (1,381 | )
U.S. government securities |  | 251 |  |  | — |  |  | — |  |  | — |  |  | 251 |  |  | — |
Other securities |  | 2,263 |  |  | (51 | ) |  | 2,734 |  |  | (222 | ) |  | 4,997 |  |  | (273 | )
Total |  | $ | 1,398,191 |  |  | $ | (22,701 | ) |  | $ | 161,992 |  |  | $ | (6,106 | ) |  | $ | 1,560,183 |  |  | $ | (28,807 | )
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 |  | 218,811 |  |  | (1,511 | ) |  | — |  |  | — |  |  | 218,811 |  |  | (1,511 | )
U.S. government securities |  | 251 |  |  | (1 | ) |  | — |  |  | — |  |  | 251 |  |  | (1 | )
Other securities |  | 2,263 |  |  | (51 | ) |  | 2,743 |  |  | (213 | ) |  | 5,006 |  |  | (264 | )
Total |  | $ | 1,461,783 |  |  | $ | (25,415 | ) |  | $ | 165,173 |  |  | $ | (5,276 | ) |  | $ | 1,626,956 |  |  | $ | (30,691 | )

At March 31, 2017, there were 198 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations securities in an unrealized loss position, of which 52 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 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, the Company does not consider these investments to be other-than-temporarily impaired at March 31, 2017.
At March 31, 2017, there were 142 state and municipal government securities in an unrealized loss position, of which five 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 March 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 are investment grade and the Company does not 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, the Company does not consider these investments to be other-than-temporarily impaired at March 31, 2017.
At March 31, 2017, there were 20 U.S. government agency and government-sponsored enterprise securities in an unrealized loss position, of which none 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, the Company does not consider these investments to be other-than-temporarily impaired at March 31, 2017.
At March 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
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recovery of amortized cost basis, which may be upon maturity, the Company does not consider this investment to be other-than-temporarily impaired at March 31, 2017.
At March 31, 2017, there were two other securities in an unrealized loss position, of which one was 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 March 31, 2017 as it has the intent and ability to hold this investment for sufficient time to allow for recovery in the market value.
4. 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.”
The following is an analysis of the loan portfolio by segment (net of unearned income):

|  | March 31, 2017 |  | December 31, 2016
|  | Loans, excluding PCI loans |  | PCI Loans |  | Total |  | Loans, excluding PCI loans |  | PCI Loans |  | Total
|  | (in thousands)
Commercial business |  | $ | 2,559,247 |  |  | $ | 19,047 |  |  | $ | 2,578,294 |  |  | $ | 2,551,054 |  |  | $ | 20,185 |  |  | $ | 2,571,239 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 172,581 |  |  | 14,969 |  |  | 187,550 |  |  | 170,331 |  |  | 17,862 |  |  | 188,193 |
Commercial and multifamily residential |  | 2,783,433 |  |  | 88,527 |  |  | 2,871,960 |  |  | 2,719,830 |  |  | 89,231 |  |  | 2,809,061 |
Total real estate |  | 2,956,014 |  |  | 103,496 |  |  | 3,059,510 |  |  | 2,890,161 |  |  | 107,093 |  |  | 2,997,254 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 115,219 |  |  | 479 |  |  | 115,698 |  |  | 121,887 |  |  | 832 |  |  | 122,719 |
Commercial and multifamily residential |  | 172,895 |  |  | 989 |  |  | 173,884 |  |  | 209,118 |  |  | 1,565 |  |  | 210,683 |
Total real estate construction |  | 288,114 |  |  | 1,468 |  |  | 289,582 |  |  | 331,005 |  |  | 2,397 |  |  | 333,402 |
Consumer |  | 318,069 |  |  | 14,893 |  |  | 332,962 |  |  | 329,261 |  |  | 15,985 |  |  | 345,246 |
Less: Net unearned income |  | (32,212 | ) |  | — |  |  | (32,212 | ) |  | (33,718 | ) |  | — |  |  | (33,718 | )
Total loans, net of unearned income |  | 6,089,232 |  |  | 138,904 |  |  | 6,228,136 |  |  | 6,067,763 |  |  | 145,660 |  |  | 6,213,423 |
Less: Allowance for loan and lease losses |  | (61,626 | ) |  | (9,395 | ) |  | (71,021 | ) |  | (59,528 | ) |  | (10,515 | ) |  | (70,043 | )
Total loans, net |  | $ | 6,027,606 |  |  | $ | 129,509 |  |  | $ | 6,157,115 |  |  | $ | 6,008,235 |  |  | $ | 135,145 |  |  | $ | 6,143,380 |
Loans held for sale |  | $ | 3,245 |  |  | $ | — |  |  | $ | 3,245 |  |  | $ | 5,846 |  |  | $ | — |  |  | $ | 5,846 |

At March 31, 2017 and December 31, 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 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 $10.1 million at March 31, 2017 and December 31, 2016. During the first three months of 2017, there were $75 thousand in advances and $96 thousand in repayments.
At March 31, 2017 and December 31, 2016, $2.28 billion and $2.29 billion of commercial and residential real estate loans were pledged as collateral on Federal Home Loan Bank of Des Moines (“FHLB”) borrowings and additional borrowing capacity. The Company has also pledged $50.0 million and $54.2 million of commercial loans to the Federal Reserve Bank for additional borrowing capacity at March 31, 2017 and December 31, 2016, respectively.
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The following is an analysis of nonaccrual loans as of March 31, 2017 and December 31, 2016:

|  | March 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)
Commercial business: |  |  |  |  |  |  |  |
Secured |  | $ | 10,659 |  |  | $ | 21,144 |  |  | $ | 11,524 |  |  | $ | 21,503 |
Unsecured |  | 189 |  |  | 457 |  |  | 31 |  |  | 303 |
Real estate: |  |  |  |  |  |  |  |
One-to-four family residential |  | 450 |  |  | 1,703 |  |  | 568 |  |  | 1,302 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |
Commercial land |  | 2,729 |  |  | 2,726 |  |  | 934 |  |  | 922 |
Income property |  | 3,290 |  |  | 3,561 |  |  | 4,005 |  |  | 4,247 |
Owner occupied |  | 4,218 |  |  | 8,544 |  |  | 6,248 |  |  | 9,030 |
Real estate construction: |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |
Land and acquisition |  | — |  |  | — |  |  | 14 |  |  | 102 |
Residential construction |  | 213 |  |  | 213 |  |  | 549 |  |  | 549 |
Consumer |  | 3,799 |  |  | 4,180 |  |  | 3,883 |  |  | 4,331 |
Total |  | $ | 25,547 |  |  | $ | 42,528 |  |  | $ | 27,756 |  |  | $ | 42,289 |

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Loans, excluding purchased credit impaired loans
The following is an aging of the recorded investment of the loan portfolio as of March 31, 2017 and December 31, 2016:

|  | Current Loans |  | 30 - 59 Days Past Due |  | 60 - 89 Days Past Due |  | Greater than 90 Days Past Due |  | Total Past Due |  | Nonaccrual Loans |  | Total Loans
March 31, 2017 |  | (in thousands)
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 2,447,180 |  |  | $ | 6,417 |  |  | $ | 204 |  |  | $ | — |  |  | $ | 6,621 |  |  | $ | 10,659 |  |  | $ | 2,464,460 |
Unsecured |  | 90,245 |  |  | 34 |  |  | 5 |  |  | — |  |  | 39 |  |  | 189 |  |  | 90,473 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 168,634 |  |  | 1,115 |  |  | — |  |  | — |  |  | 1,115 |  |  | 450 |  |  | 170,199 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 280,562 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 2,729 |  |  | 283,291 |
Income property |  | 1,366,062 |  |  | 583 |  |  | 140 |  |  | — |  |  | 723 |  |  | 3,290 |  |  | 1,370,075 |
Owner occupied |  | 1,107,061 |  |  | — |  |  | 45 |  |  | — |  |  | 45 |  |  | 4,218 |  |  | 1,111,324 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 6,770 |  |  | 29 |  |  | — |  |  | — |  |  | 29 |  |  | — |  |  | 6,799 |
Residential construction |  | 107,382 |  |  | 189 |  |  | — |  |  | — |  |  | 189 |  |  | 213 |  |  | 107,784 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 106,227 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 106,227 |
Owner occupied |  | 64,365 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 64,365 |
Consumer |  | 308,902 |  |  | 907 |  |  | 627 |  |  | — |  |  | 1,534 |  |  | 3,799 |  |  | 314,235 |
Total |  | $ | 6,053,390 |  |  | $ | 9,274 |  |  | $ | 1,021 |  |  | $ | — |  |  | $ | 10,295 |  |  | $ | 25,547 |  |  | $ | 6,089,232 |
|  | Current Loans |  | 30 - 59 Days Past Due |  | 60 - 89 Days Past Due |  | Greater than 90 Days Past Due |  | Total Past Due |  | Nonaccrual Loans |  | Total Loans
December 31, 2016 |  | (in thousands)
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 2,439,250 |  |  | $ | 806 |  |  | $ | 10 |  |  | $ | — |  |  | $ | 816 |  |  | $ | 11,524 |  |  | $ | 2,451,590 |
Unsecured |  | 94,118 |  |  | 287 |  |  | 301 |  |  | — |  |  | 588 |  |  | 31 |  |  | 94,737 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 164,416 |  |  | 2,448 |  |  | 500 |  |  | — |  |  | 2,948 |  |  | 568 |  |  | 167,932 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 269,816 |  |  | 64 |  |  | — |  |  | — |  |  | 64 |  |  | 934 |  |  | 270,814 |
Income property |  | 1,365,150 |  |  | 480 |  |  | 111 |  |  | — |  |  | 591 |  |  | 4,005 |  |  | 1,369,746 |
Owner occupied |  | 1,052,078 |  |  | 1,652 |  |  | — |  |  | — |  |  | 1,652 |  |  | 6,248 |  |  | 1,059,978 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 11,542 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 14 |  |  | 11,556 |
Residential construction |  | 109,080 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 549 |  |  | 109,629 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 103,779 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 103,779 |
Owner occupied |  | 103,480 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 103,480 |
Consumer |  | 318,369 |  |  | 2,035 |  |  | 235 |  |  | — |  |  | 2,270 |  |  | 3,883 |  |  | 324,522 |
Total |  | $ | 6,031,078 |  |  | $ | 7,772 |  |  | $ | 1,157 |  |  | $ | — |  |  | $ | 8,929 |  |  | $ | 27,756 |  |  | $ | 6,067,763 |

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The following is an analysis of impaired loans as of March 31, 2017 and December 31, 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 |  | Related Allowance |  | Recorded Investment |  | Unpaid Principal Balance
March 31, 2017 |  | (in thousands)
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 2,456,672 |  |  | $ | 7,788 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 7,788 |  |  | $ | 14,806 |
Unsecured |  | 90,473 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 169,686 |  |  | 513 |  |  | 424 |  |  | 688 |  |  | 11 |  |  | 89 |  |  | 287 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 280,992 |  |  | 2,299 |  |  | — |  |  | — |  |  | — |  |  | 2,299 |  |  | 2,288 |
Income property |  | 1,366,381 |  |  | 3,694 |  |  | 533 |  |  | 537 |  |  | 26 |  |  | 3,161 |  |  | 3,656 |
Owner occupied |  | 1,107,814 |  |  | 3,510 |  |  | — |  |  | — |  |  | — |  |  | 3,510 |  |  | 6,327 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 6,799 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Residential construction |  | 107,784 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 106,227 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Owner occupied |  | 64,365 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Consumer |  | 308,710 |  |  | 5,525 |  |  | 4,923 |  |  | 5,013 |  |  | 57 |  |  | 602 |  |  | 682 |
Total |  | $ | 6,065,903 |  |  | $ | 23,329 |  |  | $ | 5,880 |  |  | $ | 6,238 |  |  | $ | 94 |  |  | $ | 17,449 |  |  | $ | 28,046 |
|  | 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 |  | Related Allowance |  | Recorded Investment |  | Unpaid Principal Balance
December 31, 2016 |  | (in thousands)
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 2,442,772 |  |  | $ | 8,818 |  |  | $ | 2,414 |  |  | $ | 2,484 |  |  | $ | 664 |  |  | $ | 6,404 |  |  | $ | 12,831 |
Unsecured |  | 94,737 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 167,403 |  |  | 529 |  |  | 435 |  |  | 693 |  |  | 12 |  |  | 94 |  |  | 291 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 270,106 |  |  | 708 |  |  | — |  |  | — |  |  | — |  |  | 708 |  |  | 687 |
Income property |  | 1,365,321 |  |  | 4,425 |  |  | 540 |  |  | 544 |  |  | 27 |  |  | 3,885 |  |  | 4,148 |
Owner occupied |  | 1,054,564 |  |  | 5,414 |  |  | — |  |  | — |  |  | — |  |  | 5,414 |  |  | 8,102 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 11,542 |  |  | 14 |  |  | 14 |  |  | 102 |  |  | 1 |  |  | — |  |  | — |
Residential construction |  | 109,293 |  |  | 336 |  |  | — |  |  | — |  |  | — |  |  | 336 |  |  | 336 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 103,779 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Owner occupied |  | 103,480 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Consumer |  | 319,307 |  |  | 5,215 |  |  | 4,464 |  |  | 4,558 |  |  | 57 |  |  | 751 |  |  | 833 |
Total |  | $ | 6,042,304 |  |  | $ | 25,459 |  |  | $ | 7,867 |  |  | $ | 8,381 |  |  | $ | 761 |  |  | $ | 17,592 |  |  | $ | 27,228 |

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The following table provides additional information on impaired loans for the three month periods indicated:

|  | Three Months Ended March 31,
|  | 2017 |  | 2016
|  | Average Recorded Investment Impaired Loans |  | Interest Recognized on Impaired Loans |  | Average Recorded Investment Impaired Loans |  | Interest Recognized on Impaired Loans
|  | (in thousands)
Commercial business: |  |  |  |  |  |  |  |
Secured |  | $ | 8,303 |  |  | $ | 19 |  |  | $ | 12,103 |  |  | $ | 17 |
Real estate: |  |  |  |  |  |  |  |
One-to-four family residential |  | 521 |  |  | 2 |  |  | 975 |  |  | 6 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |
Commercial land |  | 1,504 |  |  | — |  |  | — |  |  | — |
Income property |  | 4,059 |  |  | 1 |  |  | 2,080 |  |  | 3 |
Owner occupied |  | 4,462 |  |  | — |  |  | 5,516 |  |  | 7 |
Real estate construction: |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |
Land and acquisition |  | 7 |  |  | — |  |  | 388 |  |  | 1 |
Residential construction |  | 168 |  |  | — |  |  | 562 |  |  | — |
Consumer |  | 5,370 |  |  | 27 |  |  | 824 |  |  | 2 |
Total |  | $ | 24,394 |  |  | $ | 49 |  |  | $ | 22,448 |  |  | $ | 36 |

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The following is an analysis of loans classified as troubled debt restructurings (“TDR”) during the three months ended March 31, 2017 and 2016:

|  | Three months ended March 31, 2017 |  | Three months ended March 31, 2016
|  | 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 |  | 3 |  |  | $ | 356 |  |  | $ | 356 |  |  | 3 |  |  | $ | 1,370 |  |  | $ | 1,370 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Owner occupied |  | — |  |  | — |  |  | — |  |  | 1 |  |  | 250 |  |  | 250 |
Consumer |  | 10 |  |  | 1,546 |  |  | 1,546 |  |  | 4 |  |  | 497 |  |  | 497 |
Total |  | 13 |  |  | $ | 1,902 |  |  | $ | 1,902 |  |  | 8 |  |  | $ | 2,117 |  |  | $ | 2,117 |

The Company’s loans classified as TDR are loans that have been modified or the borrower has been granted special concessions due to financial difficulties that, if not for the challenges of the borrower, the Company would not otherwise consider. The TDR modifications or concessions are made to increase the likelihood that these borrowers with financial difficulties will be able to satisfy their debt obligations as 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 discounted cash flows or observable market price) of the impaired loan is lower than the recorded investment of that loan.
The Company had commitments to lend $451 thousand of additional funds on loans classified as TDR as of March 31, 2017. The Company had $508 thousand of such commitments at December 31, 2016. The Company did not have any loans modified as TDR that defaulted within twelve months of being modified as TDR during the three month periods ended March 31, 2017 and 2016.
Purchased Credit Impaired Loans
Purchased credit impaired (“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 remeasures 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, which utilizes probability values 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 remeasurement date. Loss severity factors are based upon either actual charge-off 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.
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The following is an analysis of our PCI loans, net of related allowance for losses and remaining valuation discounts as of March 31, 2017 and December 31, 2016:

|  | March 31, 2017 |  | December 31, 2016
|  | (in thousands)
Commercial business |  | $ | 20,292 |  |  | $ | 21,606 |
Real estate: |  |  |  |
One-to-four family residential |  | 17,608 |  |  | 20,643 |
Commercial and multifamily residential |  | 92,930 |  |  | 94,795 |
Total real estate |  | 110,538 |  |  | 115,438 |
Real estate construction: |  |  |  |
One-to-four family residential |  | 479 |  |  | 832 |
Commercial and multifamily residential |  | 1,089 |  |  | 1,726 |
Total real estate construction |  | 1,568 |  |  | 2,558 |
Consumer |  | 16,485 |  |  | 17,649 |
Subtotal of PCI loans |  | 148,883 |  |  | 157,251 |
Less: |  |  |  |
Valuation discount resulting from acquisition accounting |  | 9,979 |  |  | 11,591 |
Allowance for loan losses |  | 9,395 |  |  | 10,515 |
PCI loans, net of allowance for loan losses |  | $ | 129,509 |  |  | $ | 135,145 |

The following table shows the changes in accretable yield for PCI loans for the three months ended March 31, 2017 and 2016:

|  | Three Months Ended March 31,
|  | 2017 |  | 2016
|  | (in thousands)
Balance at beginning of period |  | $ | 45,191 |  |  | $ | 58,981 |
Accretion |  | (4,182 | ) |  | (4,229 | )
Disposals |  | (158 | ) |  | 94 |
Reclassifications from (to) nonaccretable difference |  | (2,407 | ) |  | 1,761 |
Balance at end of period |  | $ | 38,444 |  |  | $ | 56,607 |

5. Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit
We record an allowance for loan and lease losses (the “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 three months ended March 31, 2017 and 2016.
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The following tables show a detailed analysis of the allowance for the three months ended March 31, 2017 and 2016:

|  | Beginning Balance |  | Charge-offs |  | Recoveries |  | Provision (Recovery) |  | Ending Balance |  | Specific Reserve |  | General Allocation
Three months ended March 31, 2017 |  | (in thousands)
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 36,050 |  |  | $ | (1,109 | ) |  | $ | 297 |  |  | $ | 434 |  |  | $ | 35,672 |  |  | $ | — |  |  | $ | 35,672 |
Unsecured |  | 960 |  |  | (18 | ) |  | 68 |  |  | 178 |  |  | 1,188 |  |  | — |  |  | 1,188 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 599 |  |  | (307 | ) |  | 117 |  |  | 236 |  |  | 645 |  |  | 11 |  |  | 634 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 1,797 |  |  | — |  |  | — |  |  | 491 |  |  | 2,288 |  |  | — |  |  | 2,288 |
Income property |  | 7,342 |  |  | — |  |  | 35 |  |  | (574 | ) |  | 6,803 |  |  | 26 |  |  | 6,777 |
Owner occupied |  | 6,439 |  |  | — |  |  | 43 |  |  | 52 |  |  | 6,534 |  |  | — |  |  | 6,534 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 316 |  |  | (14 | ) |  | 20 |  |  | 187 |  |  | 509 |  |  | — |  |  | 509 |
Residential construction |  | 669 |  |  | — |  |  | 9 |  |  | 431 |  |  | 1,109 |  |  | — |  |  | 1,109 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 404 |  |  | — |  |  | — |  |  | 378 |  |  | 782 |  |  | — |  |  | 782 |
Owner occupied |  | 1,192 |  |  | — |  |  | — |  |  | 576 |  |  | 1,768 |  |  | — |  |  | 1,768 |
Consumer |  | 3,534 |  |  | (428 | ) |  | 285 |  |  | (31 | ) |  | 3,360 |  |  | 57 |  |  | 3,303 |
Purchased credit impaired |  | 10,515 |  |  | (1,939 | ) |  | 1,144 |  |  | (325 | ) |  | 9,395 |  |  | — |  |  | 9,395 |
Unallocated |  | 226 |  |  | — |  |  | — |  |  | 742 |  |  | 968 |  |  | — |  |  | 968 |
Total |  | $ | 70,043 |  |  | $ | (3,815 | ) |  | $ | 2,018 |  |  | $ | 2,775 |  |  | $ | 71,021 |  |  | $ | 94 |  |  | $ | 70,927 |

|  | Beginning Balance |  | Charge-offs |  | Recoveries |  | Provision (Recovery) |  | Ending Balance |  | Specific Reserve |  | General Allocation
Three months ended March 31, 2016 |  | (in thousands)
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 32,321 |  |  | $ | (3,770 | ) |  | $ | 611 |  |  | $ | 2,952 |  |  | $ | 32,114 |  |  | $ | 2,500 |  |  | $ | 29,614 |
Unsecured |  | 1,299 |  |  | (3 | ) |  | 51 |  |  | (47 | ) |  | 1,300 |  |  | — |  |  | 1,300 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 916 |  |  | — |  |  | 41 |  |  | (303 | ) |  | 654 |  |  | — |  |  | 654 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 1,178 |  |  | — |  |  | — |  |  | 84 |  |  | 1,262 |  |  | — |  |  | 1,262 |
Income property |  | 6,616 |  |  | — |  |  | 61 |  |  | 725 |  |  | 7,402 |  |  | — |  |  | 7,402 |
Owner occupied |  | 5,550 |  |  | — |  |  | 8 |  |  | 528 |  |  | 6,086 |  |  | — |  |  | 6,086 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 339 |  |  | — |  |  | 51 |  |  | 250 |  |  | 640 |  |  | — |  |  | 640 |
Residential construction |  | 733 |  |  | — |  |  | 203 |  |  | 513 |  |  | 1,449 |  |  | — |  |  | 1,449 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 388 |  |  | — |  |  | 1 |  |  | 326 |  |  | 715 |  |  | — |  |  | 715 |
Owner occupied |  | 1,006 |  |  | — |  |  | — |  |  | 204 |  |  | 1,210 |  |  | — |  |  | 1,210 |
Consumer |  | 3,531 |  |  | (266 | ) |  | 165 |  |  | (62 | ) |  | 3,368 |  |  | 15 |  |  | 3,353 |
Purchased credit impaired |  | 13,726 |  |  | (2,866 | ) |  | 1,551 |  |  | 653 |  |  | 13,064 |  |  | — |  |  | 13,064 |
Unallocated |  | 569 |  |  | — |  |  | — |  |  | (569 | ) |  | — |  |  | — |  |  | — |
Total |  | $ | 68,172 |  |  | $ | (6,905 | ) |  | $ | 2,743 |  |  | $ | 5,254 |  |  | $ | 69,264 |  |  | $ | 2,515 |  |  | $ | 66,749 |

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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:

|  | Three Months Ended
|  | March 31,
|  | 2017 |  | 2016
|  | (in thousands)
Balance at beginning of period |  | $ | 2,705 |  |  | $ | 2,930 |
Net changes in the allowance for unfunded commitments and letters of credit |  | 850 |  |  | — |
Balance at end of period |  | $ | 3,555 |  |  | $ | 2,930 |

Risk Elements
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, 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, 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 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 rated 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.
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The following is an analysis of the credit quality of our loan portfolio, excluding PCI loans, as of March 31, 2017 and December 31, 2016:

|  | Pass |  | Special Mention |  | Substandard |  | Doubtful |  | Loss |  | Total
March 31, 2017 |  | (in thousands)
Loans, excluding PCI loans: |  |  |  |  |  |  |  |  |  |  |  |
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 2,297,687 |  |  | $ | 40,267 |  |  | $ | 126,506 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,464,460 |
Unsecured |  | 89,171 |  |  | 850 |  |  | 452 |  |  | — |  |  | — |  |  | 90,473 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 169,158 |  |  | — |  |  | 1,041 |  |  | — |  |  | — |  |  | 170,199 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 270,840 |  |  | 5,199 |  |  | 7,252 |  |  | — |  |  | — |  |  | 283,291 |
Income property |  | 1,345,290 |  |  | 6,321 |  |  | 18,464 |  |  | — |  |  | — |  |  | 1,370,075 |
Owner occupied |  | 1,077,648 |  |  | 3,673 |  |  | 30,003 |  |  | — |  |  | — |  |  | 1,111,324 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 6,799 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 6,799 |
Residential construction |  | 107,571 |  |  | — |  |  | 213 |  |  | — |  |  | — |  |  | 107,784 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 106,227 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 106,227 |
Owner occupied |  | 60,315 |  |  | — |  |  | 4,050 |  |  | — |  |  | — |  |  | 64,365 |
Consumer |  | 307,559 |  |  | 1 |  |  | 6,675 |  |  | — |  |  | — |  |  | 314,235 |
Total |  | $ | 5,838,265 |  |  | $ | 56,311 |  |  | $ | 194,656 |  |  | $ | — |  |  | $ | — |  |  | 6,089,232 |
Less: |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan and lease losses |  | 61,626 |
Loans, excluding PCI loans, net |  | $ | 6,027,606 |

|  | Pass |  | Special Mention |  | Substandard |  | Doubtful |  | Loss |  | Total
December 31, 2016 |  | (in thousands)
Loans, excluding PCI loans: |  |  |  |  |  |  |  |  |  |  |  |
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 2,289,307 |  |  | $ | 65,846 |  |  | $ | 96,437 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,451,590 |
Unsecured |  | 93,721 |  |  | 800 |  |  | 216 |  |  | — |  |  | — |  |  | 94,737 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 164,797 |  |  | 395 |  |  | 2,740 |  |  | — |  |  | — |  |  | 167,932 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 263,195 |  |  | 3,228 |  |  | 4,391 |  |  | — |  |  | — |  |  | 270,814 |
Income property |  | 1,341,978 |  |  | 17,902 |  |  | 9,866 |  |  | — |  |  | — |  |  | 1,369,746 |
Owner occupied |  | 1,027,019 |  |  | 6,608 |  |  | 26,351 |  |  | — |  |  | — |  |  | 1,059,978 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 11,541 |  |  | — |  |  | 15 |  |  | — |  |  | — |  |  | 11,556 |
Residential construction |  | 108,941 |  |  | — |  |  | 688 |  |  | — |  |  | — |  |  | 109,629 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 103,779 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 103,779 |
Owner occupied |  | 98,948 |  |  | 88 |  |  | 4,444 |  |  | — |  |  | — |  |  | 103,480 |
Consumer |  | 317,728 |  |  | — |  |  | 6,794 |  |  | — |  |  | — |  |  | 324,522 |
Total |  | $ | 5,820,954 |  |  | $ | 94,867 |  |  | $ | 151,942 |  |  | $ | — |  |  | $ | — |  |  | 6,067,763 |
Less: |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan and lease losses |  | 59,528 |
Loans, excluding PCI loans, net |  | $ | 6,008,235 |

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The following is an analysis of the credit quality of our PCI loan portfolio as of March 31, 2017 and December 31, 2016:

|  | Pass |  | Special Mention |  | Substandard |  | Doubtful |  | Loss |  | Total
March 31, 2017 |  | (in thousands)
PCI loans: |  |  |  |  |  |  |  |  |  |  |  |
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 18,443 |  |  | $ | 89 |  |  | $ | 1,022 |  |  | $ | — |  |  | $ | — |  |  | $ | 19,554 |
Unsecured |  | 738 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 738 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 16,571 |  |  | — |  |  | 1,037 |  |  | — |  |  | — |  |  | 17,608 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 8,703 |  |  | 2,032 |  |  | — |  |  | — |  |  | — |  |  | 10,735 |
Income property |  | 27,857 |  |  | — |  |  | 138 |  |  | — |  |  | — |  |  | 27,995 |
Owner occupied |  | 53,380 |  |  | — |  |  | 820 |  |  | — |  |  | — |  |  | 54,200 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 401 |  |  | — |  |  | 78 |  |  | — |  |  | — |  |  | 479 |
Residential construction |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 799 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 799 |
Owner occupied |  | 290 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 290 |
Consumer |  | 16,045 |  |  | — |  |  | 440 |  |  | — |  |  | — |  |  | 16,485 |
Total |  | $ | 143,227 |  |  | $ | 2,121 |  |  | $ | 3,535 |  |  | $ | — |  |  | $ | — |  |  | 148,883 |
Less: |  |  |  |  |  |  |  |  |  |  |  |
Valuation discount resulting from acquisition accounting |  | 9,979 |
Allowance for loan losses |  | 9,395 |
PCI loans, net |  | $ | 129,509 |

|  | Pass |  | Special Mention |  | Substandard |  | Doubtful |  | Loss |  | Total
December 31, 2016 |  | (in thousands)
PCI loans: |  |  |  |  |  |  |  |  |  |  |  |
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 18,824 |  |  | $ | 92 |  |  | $ | 1,954 |  |  | $ | — |  |  | $ | — |  |  | $ | 20,870 |
Unsecured |  | 736 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 736 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 19,293 |  |  | — |  |  | 1,350 |  |  | — |  |  | — |  |  | 20,643 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 7,333 |  |  | — |  |  | 213 |  |  | — |  |  | — |  |  | 7,546 |
Income property |  | 31,042 |  |  | — |  |  | 1,678 |  |  | — |  |  | — |  |  | 32,720 |
Owner occupied |  | 53,623 |  |  | — |  |  | 906 |  |  | — |  |  | — |  |  | 54,529 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 744 |  |  | — |  |  | 88 |  |  | — |  |  | — |  |  | 832 |
Residential construction |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 1,217 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,217 |
Owner occupied |  | 509 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 509 |
Consumer |  | 17,202 |  |  | — |  |  | 447 |  |  | — |  |  | — |  |  | 17,649 |
Total |  | $ | 150,523 |  |  | $ | 92 |  |  | $ | 6,636 |  |  | $ | — |  |  | $ | — |  |  | 157,251 |
Less: |  |  |  |  |  |  |  |  |  |  |  |
Valuation discount resulting from acquisition accounting |  | 11,591 |
Allowance for loan losses |  | 10,515 |
PCI loans, net |  | $ | 135,145 |

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6. Other Real Estate Owned (“OREO”)
The following tables set forth activity in OREO for the three months ended March 31, 2017 and 2016:

|  | Three Months Ended March 31,
|  | 2017 |  | 2016
|  | (in thousands)
Balance, beginning of period |  | $ | 5,998 |  |  | $ | 13,738 |
Transfers in |  | — |  |  | 105 |
Valuation adjustments |  | (193 | ) |  | (137 | )
Proceeds from sale of OREO property |  | (1,275 | ) |  | (1,326 | )
Gain (loss) on sale of OREO, net |  | (11 | ) |  | 47 |
Balance, end of period |  | $ | 4,519 |  |  | $ | 12,427 |

At March 31, 2017, the carrying amount of foreclosed residential real estate properties held as a result of obtaining physical possession was $379 thousand and the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process was $675 thousand.
7. FDIC Loss-sharing Asset and Covered Assets
We are a party to eight loss-sharing agreements with the FDIC relating to four FDIC-assisted acquisitions. Such agreements cover a substantial portion of losses incurred on acquired covered loans and OREO. The loss-sharing agreements relate to the 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 terms of the loss-sharing agreements, the FDIC will absorb 80% of losses and share in 80% of loss recoveries up to specified amounts. With respect to loss-sharing agreements for two acquisitions completed in 2010, after those specified amounts, the FDIC will absorb 95% of losses and share in 95% of loss recoveries. The loss-sharing provisions of the agreements for non-single family and single family mortgage loans are in effect for five and ten years, respectively, and the loss recovery provisions are in effect for eight and ten years, respectively. The loss-sharing provisions for the Columbia River Bank and American Marine Bank non-single family covered assets were effective through the end of the first quarter of 2015. In addition, the loss-sharing provisions for the Summit Bank and First Heritage Bank non-single family covered assets expired at the end of the second quarter of 2016. Accordingly, further activity will be limited to recoveries through the first quarter of 2018 and second quarter of 2019, respectively, for assets covered by these loss-sharing agreements.
Ten years and forty-five days after the applicable acquisition dates, the Bank must pay to the FDIC a clawback in the event the losses from the acquisitions fail to reach stated levels. The amount of the clawback is determined by a formula specified in each individual loss-sharing agreement. As of March 31, 2017, the net present value of the Bank’s estimated clawback liability was $5.4 million, which was included in “Other liabilities” in the Consolidated Balance Sheets.
At March 31, 2017, the FDIC loss-sharing asset was comprised of a $2.5 million FDIC indemnification asset and a $773 thousand FDIC receivable. The indemnification asset represents the net present value of cash flows the Company expects to collect from the FDIC under the loss-sharing agreements and the FDIC receivable represents amounts from the FDIC for which the Company has requested reimbursement but has not yet received reimbursement.
For PCI loans, the Company remeasures contractual and expected cash flows on a quarterly basis. When the quarterly remeasurement process results in a decrease in expected cash flows due to an increase in expected credit losses, impairment is recorded. As a result of this impairment, for loans covered by loss-sharing agreements with respect to which the loss-sharing provisions are still effective, the indemnification asset is increased to reflect anticipated future cash to be received from the FDIC. Consistent with the loss-sharing agreements between the Company and the FDIC, the amount of the increase to the indemnification asset is measured as 80% of the resulting impairment.
Alternatively, when the quarterly remeasurement results in an increase in expected future cash flows due to a decrease in expected credit losses, the nonaccretable difference decreases and the effective yield of the related loan portfolio is increased. As a result of the improved expected cash flows, for loans covered by loss-sharing agreements with respect to which the loss-sharing provisions are still effective, the indemnification asset would be reduced first by the amount of any impairment previously recorded and, second, by increased amortization over the remaining life of the related loss-sharing agreement.
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The following table shows a detailed analysis of the FDIC loss-sharing asset for the three months ended March 31, 2017 and 2016:

|  | Three Months Ended March 31,
|  | 2017 |  | 2016
|  | (in thousands)
Balance at beginning of period |  | $ | 3,535 |  |  | $ | 6,568 |
Adjustments not reflected in income: |  |  |  |
Cash paid to the FDIC, net |  | 184 |  |  | 353 |
FDIC reimbursable losses (recoveries), net |  | (206 | ) |  | 136 |
Adjustments reflected in income: |  |  |  |
Amortization, net |  | (315 | ) |  | (1,332 | )
Loan impairment |  | 40 |  |  | 147 |
Sale of other real estate |  | 7 |  |  | 144 |
Valuation adjustments of other real estate owned |  | — |  |  | 18 |
Other |  | (6 | ) |  | (80 | )
Balance at end of period |  | $ | 3,239 |  |  | $ | 5,954 |

The following table presents information about the composition of the FDIC loss-sharing asset, the clawback liability, the non-single family and the single family covered assets as of the date indicated:

|  | March 31, 2017
|  | Columbia River Bank |  | American Marine Bank |  | Summit Bank |  | First Heritage Bank |  | Total
|  | (in thousands)
FDIC loss-sharing asset (liability) |  | $ | 158 |  |  | $ | 1,676 |  |  | $ | 1,313 |  |  | $ | 92 |  |  | $ | 3,239 |
Clawback liability |  | $ | 3,362 |  |  | $ | 1,275 |  |  | $ | — |  |  | $ | 743 |  |  | $ | 5,380 |
Non-single family covered assets |  | $ | 50,590 |  |  | $ | 8,885 |  |  | $ | 4,788 |  |  | $ | 9,728 |  |  | $ | 73,991 |
Single family covered assets |  | $ | 5,721 |  |  | $ | 15,319 |  |  | $ | 4,182 |  |  | $ | 1,223 |  |  | $ | 26,445 |
Loss-sharing expiration dates: |  |  |  |  |  |  |  |  |  |
Non-single family |  | Expired |  | Expired |  | Expired |  | Expired |  |
Single family |  | First Quarter 2020 |  | First Quarter 2020 |  | Second Quarter 2021 |  | Second Quarter 2021 |  |
Recovery-sharing expiration dates: |  |  |  |  |  |  |  |  |  |
Non-single family |  | First Quarter 2018 |  | First Quarter 2018 |  | Second Quarter 2019 |  | Second Quarter 2019 |  |
Single family |  | First Quarter 2020 |  | First Quarter 2020 |  | Second Quarter 2021 |  | Second Quarter 2021 |  |
Clawback settlement dates |  | First Quarter 2020 |  | First Quarter 2020 |  | Third Quarter 2021 |  | Third Quarter 2021 |  |

8. 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 on July 31 and between annual tests in certain circumstances such as 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 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.
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The following table sets forth activity for goodwill and other intangible assets for the periods indicated:

|  | Three Months Ended March 31,
|  | 2017 |  | 2016
|  | (in thousands)
Goodwill |  |  |  |
Total goodwill |  | $ | 382,762 |  |  | $ | 382,762 |
Other intangible assets, net |  |  |  |
Core deposit intangible: |  |  |  |
Gross core deposit intangible balance at beginning of period |  | 58,598 |  |  | 58,598 |
Accumulated amortization at beginning of period |  | (41,886 | ) |  | (35,940 | )
Core deposit intangible, net at beginning of period |  | 16,712 |  |  | 22,658 |
CDI current period amortization |  | (1,349 | ) |  | (1,583 | )
Total core deposit intangible, net at end of period |  | 15,363 |  |  | 21,075 |
Intangible assets not subject to amortization |  | 919 |  |  | 919 |
Other intangible assets, net at end of period |  | 16,282 |  |  | 21,994 |
Total goodwill and other intangible assets at end of period |  | $ | 399,044 |  |  | $ | 404,756 |

The following table provides the estimated future amortization expense of core deposit intangibles for the remaining nine months ending December 31, 2017 and the succeeding four years:

|  | Amount
|  | (in thousands)
Year ending December 31, |  |
2017 |  | $ | 3,564 |
2018 |  | 3,855 |
2019 |  | 2,951 |
2020 |  | 2,048 |
2021 |  | 1,440 |

9. 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. 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 March 31, 2017 and December 31, 2016 was $336.1 million and $309.3 million, respectively. During the three months ended March 31, 2017, a mark-to-market gain of $4 thousand was recorded to “Other” noninterest expense. During the three months ended March 31, 2016, a mark-to-market loss of $8 thousand was recorded to “Other” noninterest expense.
The following table presents the fair value of derivatives not designated as hedging instruments at March 31, 2017 and December 31, 2016:

| Asset Derivatives |  | Liability Derivatives
| March 31, 2017 |  | December 31, 2016 |  | March 31, 2017 |  | December 31, 2016
| Balance Sheet Location |  | Fair Value |  | Balance Sheet Location |  | Fair Value |  | Balance Sheet Location |  | Fair Value |  | Balance Sheet Location |  | Fair Value
| (in thousands)
Interest rate contracts | Other assets |  | $ | 8,598 |  |  | Other assets |  | $ | 9,012 |  |  | Other liabilities |  | $ | 8,618 |  |  | Other liabilities |  | $ | 9,036 |

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The Company is party to interest rate contracts 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.

| 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 |  | Gross Amounts Not Offset in the Consolidated Balance Sheets
|  |  |  | Collateral Posted |  | Net Amount
March 31, 2017 | (in thousands)
Assets |  |  |  |  |  |  |  |  |
Interest rate contracts | $ | 8,598 |  |  | $ | — |  |  | $ | 8,598 |  |  | $ | — |  |  | $ | 8,598 |
Liabilities |  |  |  |  |  |  |  |  |
Interest rate contracts | $ | 8,618 |  |  | $ | — |  |  | $ | 8,618 |  |  | $ | (8,618 | ) |  | $ | — |
Repurchase agreements | $ | 46,914 |  |  | $ | — |  |  | $ | 46,914 |  |  | $ | (46,914 | ) |  | $ | — |
December 31, 2016 |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Interest rate contracts | $ | 9,012 |  |  | $ | — |  |  | $ | 9,012 |  |  | $ | — |  |  | $ | 9,012 |
Liabilities |  |  |  |  |  |  |  |  |
Interest rate contracts | $ | 9,036 |  |  | $ | — |  |  | $ | 9,036 |  |  | $ | (9,036 | ) |  | $ | — |
Repurchase agreements | $ | 80,822 |  |  | $ | — |  |  | $ | 80,822 |  |  | $ | (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:

|  | Remaining contractual maturity of the agreements
|  | Overnight and continuous |  | Up to 30 days |  | 30 - 90 days |  | Greater than 90 days |  | Total
March 31, 2017 |  | (in thousands)
Class of collateral pledged for repurchase agreements |  |  |  |  |  |  |  |  |  |
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations |  | $ | 21,914 |  |  | $ | — |  |  | $ | — |  |  | $ | 25,000 |  |  | $ | 46,914 |
Gross amount of recognized liabilities for repurchase agreements |  |  |  |  |  |  |  |  |  | 46,914 |
Amounts related to agreements not included in offsetting 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 term wholesale repurchase agreement, which matures in 2018, is monitored on a monthly basis and additional capital is pledged when necessary. The pledged collateral related to the Company’s 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.
10. 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 2017 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.
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Sale-leaseback transaction: 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 July 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 March 31, 2017, the deferred gain was $696 thousand and is a component of "Other liabilities" in the Consolidated Balance Sheets.
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. At March 31, 2017 and December 31, 2016, the Company’s loan commitments amounted to $2.23 billion and $2.17 billion, respectively.
Standby letters of credit commit the Company to make payments on behalf of customers under specified conditions. Historically, 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. Standby letters of credit were $47.6 million and $49.7 million at March 31, 2017 and December 31, 2016, respectively. In addition, commitments under commercial letters of credit used to facilitate customers’ trade transactions and other off-balance sheet liabilities amounted to $3.0 million and $3.4 million at March 31, 2017 and December 31, 2016, respectively.
Legal Proceedings: 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, if any, resulting from these pending or threatened actions and proceedings will not have a material effect on the financial statements of the Company.
11. Shareholders’ Equity
Preferred 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 at the close of business on February 8, 2017.
Subsequent to quarter end, on April 27, 2017, the Company declared a regular 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.
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.
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12. Accumulated Other Comprehensive Loss
The following table shows changes in accumulated other comprehensive income (loss) by component for the three month periods ended March 31, 2017 and 2016:

|  | Unrealized Gains and Losses on Available-for-Sale Securities (1) |  | Unrealized Gains and Losses on Pension Plan Liability (1) |  | Total (1)
Three months ended March 31, 2017 |  | (in thousands)
Beginning balance |  | $ | (12,704 | ) |  | $ | (6,295 | ) |  | $ | (18,999 | )
Other comprehensive income before reclassifications |  | 1,702 |  |  | 4,604 |  |  | 6,306 |
Amounts reclassified from accumulated other comprehensive income |  | — |  |  | 87 |  |  | 87 |
Net current-period other comprehensive income |  | 1,702 |  |  | 4,691 |  |  | 6,393 |
Ending balance |  | $ | (11,002 | ) |  | $ | (1,604 | ) |  | $ | (12,606 | )
Three months ended March 31, 2016 |  |  |  |  |  |
Beginning balance |  | $ | 386 |  |  | $ | (6,681 | ) |  | $ | (6,295 | )
Other comprehensive income before reclassifications |  | 18,770 |  |  | — |  |  | 18,770 |
Amounts reclassified from accumulated other comprehensive income (loss) |  | (238 | ) |  | 106 |  |  | (132 | )
Net current-period other comprehensive income |  | 18,532 |  |  | 106 |  |  | 18,638 |
Ending balance |  | $ | 18,918 |  |  | $ | (6,575 | ) |  | $ | 12,343 |

__________
(1) All amounts are net of tax. Amounts in parenthesis indicate debits.
The following table shows details regarding the reclassifications from accumulated other comprehensive income (loss) for the three month periods ended March 31, 2017 and 2016:

|  | Amount Reclassified from Accumulated Other Comprehensive Income (Loss) |  |
|  | Three Months Ended March 31, |  | Affected line Item in the Consolidated
|  | 2017 |  | 2016 |  | Statement of Income
|  | (in thousands) |  |
Unrealized gains and losses on available-for-sale securities |  |  |  |  |  |
Investment securities gains |  | $ | — |  |  | $ | 373 |  |  | Investment securities gains, net
|  | — |  |  | 373 |  |  | Total before tax
|  | — |  |  | (135 | ) |  | Income tax provision
|  | $ | — |  |  | $ | 238 |  |  | Net of tax
Amortization of pension plan liability |  |  |  |  |  |
Actuarial losses |  | $ | (136 | ) |  | $ | (167 | ) |  | Compensation and employee benefits
|  | (136 | ) |  | (167 | ) |  | Total before tax
|  | 49 |  |  | 61 |  |  | Income tax benefit
|  | $ | (87 | ) |  | $ | (106 | ) |  | Net of tax

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13. 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, 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, 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.
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The following table sets forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis at March 31, 2017 and December 31, 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 |  | Fair Value Measurements at Reporting Date Using
|  | Level 1 |  | Level 2 |  | Level 3
March 31, 2017 |  | (in thousands)
Assets |  |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |  |
U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations |  | $ | 1,486,498 |  |  | $ | — |  |  | $ | 1,486,498 |  |  | $ | — |
State and municipal debt securities |  | 487,355 |  |  | — |  |  | 487,355 |  |  | — |
U.S. government agency and government-sponsored enterprise securities |  | 352,183 |  |  | — |  |  | 352,183 |  |  | — |
U.S. government securities |  | 252 |  |  | 252 |  |  | — |  |  | — |
Other securities |  | 5,071 |  |  | — |  |  | 5,071 |  |  | — |
Total securities available for sale |  | $ | 2,331,359 |  |  | $ | 252 |  |  | $ | 2,331,107 |  |  | $ | — |
Other assets (Interest rate contracts) |  | $ | 8,598 |  |  | $ | — |  |  | $ | 8,598 |  |  | $ | — |
Liabilities |  |  |  |  |  |  |  |
Other liabilities (Interest rate contracts) |  | $ | 8,618 |  |  | $ | — |  |  | $ | 8,618 |  |  | $ | — |

|  | Fair value |  | Fair Value Measurements at Reporting Date Using
|  | Level 1 |  | Level 2 |  | Level 3
December 31, 2016 |  | (in thousands)
Assets |  |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |  |
U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations |  | $ | 1,465,732 |  |  | $ | — |  |  | $ | 1,465,732 |  |  | $ | — |
State and municipal debt securities |  | 475,060 |  |  | — |  |  | 475,060 |  |  | — |
U.S. government agency and government-sponsored enterprise securities |  | 331,902 |  |  | — |  |  | 331,902 |  |  | — |
U.S. government securities |  | 800 |  |  | 800 |  |  | — |  |  | — |
Other securities |  | 5,083 |  |  | — |  |  | 5,083 |  |  | — |
Total securities available for sale |  | $ | 2,278,577 |  |  | $ | 800 |  |  | $ | 2,277,777 |  |  | $ | — |
Other assets (Interest rate contracts) |  | $ | 9,012 |  |  | $ | — |  |  | $ | 9,012 |  |  | $ | — |
Liabilities |  |  |  |  |  |  |  |
Other liabilities (Interest rate contracts) |  | $ | 9,036 |  |  | $ | — |  |  | $ | 9,036 |  |  | $ | — |

There were no transfers between Level 1 and Level 2 of the valuation hierarchy during the three month periods ended March 31, 2017 and 2016. The Company recognizes transfers between levels of the valuation hierarchy based on the valuation level at the end of the reporting period.
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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 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 interest rate, a loan’s observable market price, or the fair market value of the collateral less estimated costs to sell if the loan is a collateral-dependent loan. Generally, the Company utilizes the fair market value of the collateral to measure impairment. The impairment evaluations are performed in conjunction with the allowance process on a quarterly basis by officers in the Special Credits group, which reports to the Chief Credit Officer. The Real Estate Appraisal Services Department (“REASD”), which also reports to the Chief Credit Officer, is responsible for obtaining appraisals from third-parties or performing internal evaluations. If an appraisal is obtained from a third-party, the REASD reviews the appraisal to evaluate the adequacy of the appraisal report, including its scope, methods, accuracy and reasonableness.
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 allowance, or in the event of a write-up without previous losses charged to the allowance, a credit to earnings is recorded. Management periodically reviews OREO in an effort to ensure the property is recorded at its fair value, net of estimated costs to sell. Any fair value adjustments subsequent to acquisition are charged or credited to earnings. The initial and subsequent evaluations are performed by officers in the Special Credits group, which reports to the Chief Credit Officer. The REASD obtains appraisals from third-parties for OREO and performs internal evaluations. If an appraisal is obtained from a third-party, the REASD reviews the appraisal to evaluate the adequacy of the appraisal report, including its scope, methods, accuracy and reasonableness.
The following tables set forth information related to the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the current and prior year quarterly periods:

|  | Fair value at March 31, 2017 |  | Fair Value Measurements at Reporting Date Using |  | Losses During the Three Months Ended March 31, 2017
|  | Level 1 |  | Level 2 |  | Level 3 |
|  | (in thousands)
OREO |  | $ | 1,260 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,260 |  |  | $ | 193 |
|  | $ | 1,260 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,260 |  |  | $ | 193 |

|  | Fair value at March 31, 2016 |  | Fair Value Measurements at Reporting Date Using |  | Losses During the Three Months Ended March 31, 2016
|  | Level 1 |  | Level 2 |  | Level 3 |
|  | (in thousands)
Impaired loans |  | $ | 10,681 |  |  | $ | — |  |  | $ | — |  |  | $ | 10,681 |  |  | $ | 2,676 |
OREO |  | 2,553 |  |  | — |  |  | — |  |  | 2,553 |  |  | 137 |
|  | $ | 13,234 |  |  | $ | — |  |  | $ | — |  |  | $ | 13,234 |  |  | $ | 2,813 |

The losses on impaired loans disclosed above represent the amount of the specific reserve and/or charge-offs 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.
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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, along with the valuation techniques used, are shown in the following table:

|  | Fair value at March 31, 2017 |  | Valuation Technique |  | Unobservable Input |  | Range (Weighted Average) (1)
|  | (dollars in thousands)
OREO |  | $ | 1,260 |  |  | Fair Market Value of Collateral |  | Adjustment to Appraisal Value |  | N/A (2)
(1) Discount applied to appraisal value.
(2) Quantitative disclosures are not provided for OREO because there were no adjustments made to the appraisal values.

|  | Fair value at March 31, 2016 |  | Valuation Technique |  | Unobservable Input |  | Range (Weighted Average) (1)
|  | (dollars in thousands)
Impaired loans |  | $ | 10,681 |  |  | Fair Market Value of Collateral |  | Adjustment to Stated Value |  | 0% - 7% (6%)
OREO |  | $ | 2,553 |  |  | Fair Market Value of Collateral |  | Adjustment to Appraisal Value |  | N/A (2)
(1) Discount applied to appraisal value, letter of intent to purchase, or stated value (in the case of accounts receivable, inventory and equipment).
(2) Quantitative disclosures are not provided for OREO because there were no adjustments made to the appraisal values.

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Fair value of financial instruments
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 the results. 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 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, industry recognized information sources, yield curves, discounted cash flow models and other factors (Level 2). U.S. Treasury Notes are priced using quotes in active markets (Level 1).
Federal Home Loan Bank stock—The 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 sale 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 March 31, 2017 or December 31, 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 March 31, 2017 (Level 3).
FDIC loss-sharing asset —The fair value of the FDIC loss-sharing asset is estimated based on discounting the expected future cash flows using an estimated market rate (Level 3).
Interest rate contracts—Interest rate swap positions 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, 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 between the deposit rate and current market rates for deposits of similar remaining maturities (Level 2).
FHLB advances—The fair value of FHLB advances is estimated based on discounting the future cash flows using the market rate currently offered (Level 2).
Repurchase Agreements—The fair value of term repurchase agreements is estimated based on discounting the future cash flows using the market rate currently offered. The carrying amount of sweep repurchase agreements approximates their fair values due to the short period of time between repricing dates (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.
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The following tables summarize carrying amounts and estimated fair values of selected financial instruments as well as assumptions used by the Company in estimating fair value at March 31, 2017 and December 31, 2016:

|  | March 31, 2017
|  | Carrying Amount |  | Fair Value |  | Level 1 |  | Level 2 |  | Level 3
|  | (in thousands)
Assets |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  | $ | 169,697 |  |  | $ | 169,697 |  |  | $ | 169,697 |  |  | $ | — |  |  | $ | — |
Interest-earning deposits with banks |  | 13,124 |  |  | 13,124 |  |  | 13,124 |  |  | — |  |  | — |
Securities available for sale |  | 2,331,359 |  |  | 2,331,359 |  |  | 252 |  |  | 2,331,107 |  |  | — |
FHLB stock |  | 10,600 |  |  | 10,600 |  |  | — |  |  | 10,600 |  |  | — |
Loans held for sale |  | 3,245 |  |  | 3,245 |  |  | — |  |  | 3,245 |  |  | — |
Loans |  | 6,157,115 |  |  | 6,042,895 |  |  | — |  |  | — |  |  | 6,042,895 |
FDIC loss-sharing asset |  | 3,239 |  |  | 921 |  |  | — |  |  | — |  |  | 921 |
Interest rate contracts |  | 8,598 |  |  | 8,598 |  |  | — |  |  | 8,598 |  |  | — |
Liabilities |  |  |  |  |  |  |  |  |  |
Deposits |  | $ | 8,088,827 |  |  | $ | 8,084,550 |  |  | $ | 7,699,879 |  |  | $ | 384,671 |  |  | $ | — |
FHLB advances |  | 15,483 |  |  | 16,110 |  |  | — |  |  | 16,110 |  |  | — |
Repurchase agreements |  | 46,914 |  |  | 47,099 |  |  | — |  |  | 47,099 |  |  | — |
Interest rate contracts |  | 8,618 |  |  | 8,618 |  |  | — |  |  | 8,618 |  |  | — |

|  | 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 |  | 10,240 |  |  | 10,240 |  |  | — |  |  | 10,240 |  |  | — |
Loans held for sale |  | 5,846 |  |  | 5,846 |  |  | — |  |  | 5,846 |  |  | — |
Loans |  | 6,143,380 |  |  | 6,040,439 |  |  | — |  |  | — |  |  | 6,040,439 |
FDIC loss-sharing asset |  | 3,535 |  |  | 867 |  |  | — |  |  | — |  |  | 867 |
Interest rate contracts |  | 9,012 |  |  | 9,012 |  |  | — |  |  | 9,012 |  |  | — |
Liabilities |  |  |  |  |  |  |  |  |  |
Deposits |  | $ | 8,059,415 |  |  | $ | 8,055,168 |  |  | $ | 7,653,122 |  |  | $ | 402,046 |  |  | $ | — |
FHLB advances |  | 6,493 |  |  | 7,070 |  |  | — |  |  | 7,070 |  |  | — |
Repurchase agreements |  | 80,822 |  |  | 81,131 |  |  | — |  |  | 81,131 |  |  | — |
Interest rate contracts |  | 9,036 |  |  | 9,036 |  |  | — |  |  | 9,036 |  |  | — |

14. 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.
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The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2017 and 2016:

|  | Three Months Ended
|  | March 31,
|  | 2017 |  | 2016
|  | (in thousands except per share)
Basic EPS: |  |  |  |
Net income |  | $ | 29,199 |  |  | $ | 21,259 |
Less: Earnings allocated to participating securities: |  |  |  |
Preferred shares |  | 3 |  |  | 39 |
Nonvested restricted shares |  | 397 |  |  | 247 |
Earnings allocated to common shareholders |  | $ | 28,799 |  |  | $ | 20,973 |
Weighted average common shares outstanding |  | 57,388 |  |  | 57,114 |
Basic earnings per common share |  | $ | 0.50 |  |  | $ | 0.37 |
Diluted EPS: |  |  |  |
Earnings allocated to common shareholders |  | $ | 28,799 |  |  | $ | 20,973 |
Weighted average common shares outstanding |  | 57,388 |  |  | 57,114 |
Dilutive effect of equity awards |  | 6 |  |  | 11 |
Weighted average diluted common shares outstanding |  | 57,394 |  |  | 57,125 |
Diluted earnings per common share |  | $ | 0.50 |  |  | $ | 0.37 |
Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive |  | 14 |  |  | 27 |

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Item 2. | MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This discussion should be read in conjunction with the unaudited Consolidated Financial Statements of Columbia Banking System, Inc. (referred to in this report as “we”, “our”, “Columbia” and “the Company”) and notes thereto presented elsewhere in this report and with the December 31, 2016 audited Consolidated Financial Statements and its accompanying notes included in our Annual Report on Form 10-K. 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 one year earlier.
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS
This quarterly report on Form 10-Q 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 section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in this report and the factors set forth in the section titled “Risk Factors” in the Company’s Form 10-K, the following factors, among others, could cause actual results to differ materially from the anticipated results expressed or implied by forward-looking statements:

• | national and global economic conditions could be less favorable than expected or could have a more direct and pronounced effect on us than expected and adversely affect our ability to continue internal growth and maintain the quality of our earning assets;

• | the local housing/real estate markets where we operate and make loans could face challenges;

• | the risks presented by the economy, which could adversely affect credit quality, collateral values, including real estate collateral, investment values, liquidity and loan originations and loan portfolio delinquency rates;

• | the efficiencies and enhanced financial and operating performance we expect to realize from investments in personnel, acquisitions (including the pending acquisition of Pacific Continental Corporation (“Pacific Continental”)), and infrastructure may not be realized;

• | the ability to complete the proposed acquisition of Pacific Continental in a timely manner or at all because required regulatory, shareholder or other approvals and other conditions to closing are not received or satisfied on a timely basis or at all, or to complete future acquisitions;

• | the ability to successfully integrate Pacific Continental if the acquisition is completed, or to integrate future acquired entities;

• | interest rate changes could significantly reduce net interest income and negatively affect funding sources;

• | 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, including purchased credit impaired loans, on our earnings;

• | changes in laws and regulations affecting our businesses, including changes in the enforcement and interpretation of 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;

• | our ability to effectively manage credit risk, interest rate risk, market risk, operational risk, legal risk, liquidity risk and regulatory and compliance risk;

• | the effect of geopolitical instability, including wars, conflicts and terrorist attacks;

• | our profitability measures could be adversely affected if we are unable to effectively manage our capital;

• | natural disasters, including earthquakes, tsunamis, flooding, fires and other unexpected events; and

• | the effects of any damage to our reputation resulting from developments related to any of the items identified above.

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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.
CRITICAL ACCOUNTING POLICIES
Management has identified the accounting policies related to the allowance for loan and lease losses (the “allowance”), business combinations and the valuation and recoverability of goodwill as critical to an understanding of our financial statements. These policies and related estimates are discussed in “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” under the headings “Allowance for Loan and Lease Losses,” “Business Combinations” and “Valuation and Recoverability of Goodwill” in our 2016 Annual Report on Form 10-K. There have not been any material changes in our critical accounting policies as compared to those disclosed in our 2016 Annual Report on Form 10-K.
RESULTS OF OPERATIONS
Our results of operations are dependent to a large degree on our net interest income. We also generate noninterest income from our broad range of products and services including treasury management, wealth management, debit and credit cards and merchant card processing. Our operating expenses consist primarily of compensation and employee benefits, occupancy, data processing and legal and professional fees. Like most financial institutions, our interest income and cost of funds are affected significantly by general economic conditions, particularly changes in market interest rates, and by government policies and actions of regulatory authorities.
Earnings Summary
The Company reported net income for the first quarter of $29.2 million or $0.50 per diluted common share, compared to $21.3 million or $0.37 per diluted common share for the first quarter of 2016. Net interest income for the three months ended March 31, 2017 was $86.7 million, an increase of $6.5 million from the prior year period. The increase was a result of higher interest income on loans and taxable securities due to higher volume of such interest-earning assets as well as lower market-driven premium amortization on taxable securities. Noninterest income for the current quarter was $24.9 million, an increase of $4.2 million from the prior year period. The increase was primarily due to a $1.5 million bank owned life insurance benefit in the current quarter, higher loan fee income and a $573 thousand benefit from re-measuring to zero our estimated mortgage repurchase liability from a previous acquisition.
The provision for loan and lease losses for the first quarter of 2017 was $2.8 million compared to a provision of $5.3 million during the first quarter of 2016. The provision recorded in the first quarter of 2017 was due to the recording of a $3.1 million provision on loans, excluding PCI loans, and a $325 thousand provision recapture related to PCI loans.
Total noninterest expense for the quarter ended March 31, 2017 was $69.0 million, an increase from $65.1 million for the first quarter of 2016. The increase from the prior year period was primarily due to higher compensation and employee benefits expense and higher other noninterest expense.
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Net Interest Income
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 and net interest margin:

|  | Three Months Ended March 31, |  | Three Months Ended March 31,
|  | 2017 |  | 2016
|  | Average Balances |  | Interest Earned / Paid |  | Average Rate |  | Average Balances |  | Interest Earned / Paid |  | Average Rate
|  | (dollars in thousands)
ASSETS |  |  |  |  |  |  |  |  |  |  |  |
Loans, net (1)(2) |  | $ | 6,198,215 |  |  | $ | 75,514 |  |  | 4.87 | % |  | $ | 5,827,440 |  |  | $ | 71,298 |  |  | 4.89 | %
Taxable securities |  | 1,861,627 |  |  | 10,986 |  |  | 2.36 | % |  | 1,689,289 |  |  | 8,017 |  |  | 1.90 | %
Tax exempt securities (2) |  | 448,863 |  |  | 4,140 |  |  | 3.69 | % |  | 458,168 |  |  | 4,312 |  |  | 3.76 | %
Interest-earning deposits with banks |  | 11,586 |  |  | 19 |  |  | 0.66 | % |  | 31,048 |  |  | 38 |  |  | 0.49 | %
Total interest-earning assets |  | 8,520,291 |  |  | $ | 90,659 |  |  | 4.26 | % |  | 8,005,945 |  |  | $ | 83,665 |  |  | 4.18 | %
Other earning assets |  | 178,091 |  |  |  |  |  |  | 154,336 |  |  |  |  |
Noninterest-earning assets |  | 775,316 |  |  |  |  |  |  | 788,931 |  |  |  |  |
Total assets |  | $ | 9,473,698 |  |  |  |  |  |  | $ | 8,949,212 |  |  |  |  |
LIABILITIES AND SHAREHOLDERS’ EQUITY
Certificates of deposit |  | $ | 399,306 |  |  | $ | 95 |  |  | 0.10 | % |  | $ | 448,915 |  |  | $ | 144 |  |  | 0.13 | %
Savings accounts |  | 738,631 |  |  | 19 |  |  | 0.01 | % |  | 675,876 |  |  | 17 |  |  | 0.01 | %
Interest-bearing demand |  | 972,560 |  |  | 159 |  |  | 0.07 | % |  | 927,948 |  |  | 169 |  |  | 0.07 | %
Money market accounts |  | 2,008,107 |  |  | 514 |  |  | 0.10 | % |  | 1,930,575 |  |  | 412 |  |  | 0.09 | %
Total interest-bearing deposits |  | 4,118,604 |  |  | 787 |  |  | 0.08 | % |  | 3,983,314 |  |  | 742 |  |  | 0.07 | %
Federal Home Loan Bank advances |  | 81,577 |  |  | 225 |  |  | 1.10 | % |  | 50,569 |  |  | 124 |  |  | 0.98 | %
Other borrowings |  | 63,479 |  |  | 129 |  |  | 0.81 | % |  | 90,699 |  |  | 138 |  |  | 0.61 | %
Total interest-bearing liabilities |  | 4,263,660 |  |  | $ | 1,141 |  |  | 0.11 | % |  | 4,124,582 |  |  | $ | 1,004 |  |  | 0.10 | %
Noninterest-bearing deposits |  | 3,836,049 |  |  |  |  |  |  | 3,462,379 |  |  |  |  |
Other noninterest-bearing liabilities |  | 112,337 |  |  |  |  |  |  | 103,840 |  |  |  |  |
Shareholders’ equity |  | 1,261,652 |  |  |  |  |  |  | 1,258,411 |  |  |  |  |
Total liabilities & shareholders’ equity |  | $ | 9,473,698 |  |  |  |  |  |  | $ | 8,949,212 |  |  |  |  |
Net interest income (tax equivalent) |  | $ | 89,518 |  |  |  |  |  |  | $ | 82,661 |  |  |
Net interest margin (tax equivalent) |  | 4.20 | % |  |  |  |  |  | 4.13 | %

__________

(1) | Nonaccrual loans have been included in the tables as loans carrying a zero yield. Amortized net deferred loan fees and net unearned discounts on acquired loans were included in the interest income calculations. The amortization of net deferred loan fees was $1.6 million and $1.1 million for the three month periods ended March 31, 2017 and 2016, respectively. The incremental accretion income on acquired loans was $4.1 million and $4.7 million for the three months ended March 31, 2017 and 2016, respectively.

(2) | Tax-exempt income is calculated on a tax equivalent basis. The tax equivalent yield adjustment to interest earned on loans was $1.4 million and $982 thousand for the three months ended March 31, 2017 and 2016, respectively. The tax equivalent yield adjustment to interest earned on tax exempt securities was $1.4 million and $1.5 million for the three months ended March 31, 2017 and 2016, respectively.

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The following table sets forth the total dollar amount of change in interest income and interest expense. The changes have been segregated for each major category of interest-earning assets and interest-bearing liabilities into amounts attributable to changes in volume and changes in rates. Changes attributable to the combined effect of volume and interest rates have been allocated proportionately to the changes due to volume and the changes due to interest rates:

|  | Three Months Ended March 31, 2017 Compared to 2016 Increase (Decrease) Due to
|  | Volume |  | Rate |  | Total
|  | (in thousands)
Interest Income |  |  |  |  |  |
Loans, net |  | $ | 4,518 |  |  | $ | (302 | ) |  | $ | 4,216 |
Taxable securities |  | 877 |  |  | 2,092 |  |  | 2,969 |
Tax exempt securities |  | (87 | ) |  | (85 | ) |  | (172 | )
Interest earning deposits with banks |  | (29 | ) |  | 10 |  |  | (19 | )
Interest income |  | $ | 5,279 |  |  | $ | 1,715 |  |  | $ | 6,994 |
Interest Expense |  |  |  |  |  |
Deposits: |  |  |  |  |  |
Certificates of deposit |  | $ | (15 | ) |  | $ | (34 | ) |  | $ | (49 | )
Savings accounts |  | 2 |  |  | — |  |  | 2 |
Interest-bearing demand |  | 8 |  |  | (18 | ) |  | (10 | )
Money market accounts |  | 17 |  |  | 85 |  |  | 102 |
Total interest on deposits |  | 12 |  |  | 33 |  |  | 45 |
Federal Home Loan Bank advances |  | 84 |  |  | 17 |  |  | 101 |
Other borrowings |  | 71 |  |  | (80 | ) |  | (9 | )
Interest expense |  | $ | 167 |  |  | $ | (30 | ) |  | $ | 137 |

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:

|  | Three Months Ended March 31,
|  | 2017 |  | 2016
|  | (dollars in thousands)
Incremental accretion income due to: |  |  |  |
FDIC purchased credit impaired loans |  | $ | 2,117 |  |  | $ | 1,657 |
Other acquired loans |  | 1,948 |  |  | 3,073 |
Incremental accretion income |  | $ | 4,065 |  |  | $ | 4,730 |
Net interest margin (tax equivalent) |  | 4.20 | % |  | 4.13 | %
Operating net interest margin (tax equivalent) (1) |  | 4.09 | % |  | 4.03 | %

__________
(1) Operating net interest margin (tax equivalent) is a non-GAAP measurement. See Non-GAAP measures section of Item 2, Management’s Discussion and Analysis.
Net interest income for the first quarter of 2017 was $86.7 million, up from $80.2 million for the same quarter in 2016. The increase was due to higher loan and securities volumes, as well as lower market-driven premium amortization on securities. These increases were partially offset by lower incremental accretion income on loans. As shown in the table above, incremental accretion income continued to decline which was reflective of the decrease in volume of acquired loans. Average interest-earning assets were up $514.3 million from the prior year period due to loan growth and purchases of investment securities. The Company’s net interest margin (tax equivalent) increased to 4.20% in the first quarter of 2017, from 4.13% for the prior year period. This increase was due to lower premium amortization on taxable securities. The Company’s operating net interest margin (tax equivalent) (see footnote 1 in prior table) increased to 4.09% from 4.03% also due to a combination of higher reinvestment rates and the previously mentioned lower market-driven premium amortization on taxable securities.
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Provision for Loan and Lease Losses
During the first quarter of 2017, the Company recorded a $2.8 million provision expense compared with a provision expense of $5.3 million during the first quarter of 2016. The $2.8 million net provision for loan and lease losses recorded during the current quarter was driven by loans, excluding PCI loans, which was $3.1 million. Net provision recapture for PCI loans was $325 thousand. The $3.1 million provision for loans, excluding PCI loans, was due to growth in the loan portfolio and net charge-off activity. The provision recapture recorded relating to PCI loans was due to the increase in the present value of expected future cash flows as remeasured during the current quarter, compared to the present value of expected future cash flows measured during the fourth quarter of 2016. The amount of provision was calculated in accordance with the Company’s methodology for determining the allowance, discussed in Note 5 to the Consolidated Financial Statements in “Item 1. Financial Statements (unaudited)” of this report.
Noninterest Income
The following table presents the significant components of noninterest income and the related dollar and percentage change from period to period:

|  | Three Months Ended March 31,
|  | 2017 |  | 2016 |  | $ Change |  | % Change
|  | (dollars in thousands)
Deposit account and treasury management fees |  | $ | 7,287 |  |  | $ | 6,989 |  |  | $ | 298 |  |  | 4 | %
Card revenue |  | 5,723 |  |  | 5,652 |  |  | 71 |  |  | 1 | %
Financial services and trust revenue |  | 2,839 |  |  | 2,821 |  |  | 18 |  |  | 1 | %
Loan revenue |  | 3,593 |  |  | 2,262 |  |  | 1,331 |  |  | 59 | %
Merchant processing revenue |  | 2,019 |  |  | 2,102 |  |  | (83 | ) |  | (4 | )%
Bank owned life insurance |  | 1,280 |  |  | 1,116 |  |  | 164 |  |  | 15 | %
Investment securities gains, net |  | — |  |  | 373 |  |  | (373 | ) |  | (100 | )%
Change in FDIC loss-sharing asset |  | (274 | ) |  | (1,103 | ) |  | 829 |  |  | (75 | )%
Other |  | 2,392 |  |  | 434 |  |  | 1,958 |  |  | 451 | %
Total noninterest income |  | $ | 24,859 |  |  | $ | 20,646 |  |  | $ | 4,213 |  |  | 20 | %

Noninterest income was $24.9 million for the first quarter of 2017, compared to $20.6 million for the same period in 2016. The increase was due to higher loan fee revenue as well as higher other noninterest income. The increase in other noninterest income was due to a $1.5 million bank owned life insurance benefit in the current quarter as well as a $573 thousand benefit from re-measuring to zero our estimated mortgage repurchase liability. The repurchase liability was initially established in 2013 in connection with a prior acquisition.
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Noninterest Expense
The following table presents the significant components of noninterest expense and the related dollar and percentage change from period to period:

|  | Three Months Ended March 31,
|  | 2017 |  | 2016 |  | $ Change |  | % Change
|  | (dollars in thousands)
Compensation and employee benefits |  | $ | 40,825 |  |  | $ | 36,319 |  |  | $ | 4,506 |  |  | 12 | %
All other noninterest expense: |  |  |  |  |  |  |  |
Occupancy |  | 7,191 |  |  | 10,173 |  |  | (2,982 | ) |  | (29 | )%
Merchant processing expense |  | 1,049 |  |  | 1,033 |  |  | 16 |  |  | 2 | %
Advertising and promotion |  | 817 |  |  | 842 |  |  | (25 | ) |  | (3 | )%
Data processing |  | 4,208 |  |  | 4,146 |  |  | 62 |  |  | 1 | %
Legal and professional services |  | 3,369 |  |  | 1,325 |  |  | 2,044 |  |  | 154 | %
Taxes, license and fees |  | 1,241 |  |  | 1,290 |  |  | (49 | ) |  | (4 | )%
Regulatory premiums |  | 776 |  |  | 1,141 |  |  | (365 | ) |  | (32 | )%
Net cost (benefit) of operation of other real estate owned |  | 152 |  |  | 104 |  |  | 48 |  |  | 46 | %
Amortization of intangibles |  | 1,349 |  |  | 1,583 |  |  | (234 | ) |  | (15 | )%
Other |  | 8,009 |  |  | 7,118 |  |  | 891 |  |  | 13 | %
Total all other noninterest expense |  | 28,161 |  |  | 28,755 |  |  | (594 | ) |  | (2 | )%
Total noninterest expense |  | $ | 68,986 |  |  | $ | 65,074 |  |  | $ | 3,912 |  |  | 6 | %

The following table shows the impact of the acquisition-related expenses for the periods indicated to the various components of noninterest expense:

|  | Three Months Ended
|  | March 31,
|  | 2017 |  | 2016
|  | (in thousands)
Acquisition-related expenses: |  |  |  |
Compensation and employee benefits |  | $ | — |  |  | $ | 35 |
Occupancy |  | 1 |  |  | 2,383 |
Advertising and promotion |  | 6 |  |  | — |
Data processing |  | — |  |  | 18 |
Legal and professional fees |  | 1,311 |  |  | — |
Other |  | 46 |  |  | — |
Total impact of acquisition-related expense to noninterest expense |  | $ | 1,364 |  |  | $ | 2,436 |
Acquisition-related expenses by transaction: |  |  |  |
Pacific Continental (1) |  | $ | 1,364 |  |  | $ | — |
Intermountain |  | — |  |  | 2,436 |
Total impact of acquisition-related expense to noninterest expense |  | $ | 1,364 |  |  | $ | 2,436 |

__________
(1) Definitive agreements have been signed; however, completion of this transaction is pending as of the date of this filing.
Total noninterest expense for the first quarter of 2017 was $69.0 million, an increase of $3.9 million, or 6% from the prior year period. The increase was due to higher compensation and employee benefits, driven additional stock compensation expense related to the immediate vesting of certain restricted share awards, of which $834 thousand related to the passing of our former CEO, higher incentive expense in the current quarter relative to the Company’s overall financial performance and higher salary expense over the prior year period. Also contributing to the increased noninterest expense was higher other noninterest expense due to the recording of an additional $850 thousand for the allowance for unfunded commitments and letters of credit.
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The following table presents selected items included in “Other” noninterest expense and the associated change from period to period:

|  | Three Months Ended March 31, |  | Increase (Decrease) Amount
|  | 2017 |  | 2016 |
|  | (in thousands)
Postage |  | $ | 554 |  |  | $ | 585 |  |  | $ | (31 | )
Software support and maintenance |  | 1,283 |  |  | 1,034 |  |  | 249 |
Supplies |  | 409 |  |  | 455 |  |  | (46 | )
Loan expenses |  | 284 |  |  | 307 |  |  | (23 | )
Dues and subscriptions |  | 435 |  |  | 357 |  |  | 78 |
Insurance |  | 459 |  |  | 475 |  |  | (16 | )
Card expenses |  | 657 |  |  | 667 |  |  | (10 | )
Travel and entertainment |  | 686 |  |  | 687 |  |  | (1 | )
Employee expenses |  | 396 |  |  | 290 |  |  | 106 |
Sponsorships and charitable contributions |  | 596 |  |  | 619 |  |  | (23 | )
Directors fees |  | 233 |  |  | 192 |  |  | 41 |
Correspondent bank processing fees |  | 132 |  |  | 132 |  |  | — |
Investor relations |  | 36 |  |  | 40 |  |  | (4 | )
Other personal property owned |  | (2 | ) |  | (2 | ) |  | — |
FDIC clawback expense |  | (54 | ) |  | 209 |  |  | (263 | )
Fraud losses |  | 171 |  |  | 66 |  |  | 105 |
Miscellaneous |  | 1,734 |  |  | 1,005 |  |  | 729 |
Total other noninterest expense |  | $ | 8,009 |  |  | $ | 7,118 |  |  | $ | 891 |

Income Taxes
We recorded an income tax provision of $10.6 million for the first quarter of 2017, compared to a provision of $9.2 million for the same period in 2016, with effective tax rates of 27% for the first quarter of 2017 and 30% for the same period in 2016. Our effective tax rate remains lower than the statutory tax rate due to the amount of tax-exempt municipal securities held in the investment portfolio, tax-exempt earnings on bank owned life insurance and loans with favorable tax attributes. In addition, our effective tax rate was reduced in the current quarter due to the adoption of new share-based payment accounting (ASU 2016-09). For additional information, please refer to the Company’s annual report on Form 10-K for the year ended December 31, 2016 and Note 2 to the Consolidated Financial Statements in “Item 1. Financial Statements (unaudited)” of this report.
FINANCIAL CONDITION
Total assets were $9.53 billion as of March 31, 2017, an increase of $17.7 million from $9.51 billion at December 31, 2016. Loan growth of $14.7 million during the current year was driven by strong loan originations. Loan production was diversified across the portfolio, but was centered in commercial business and commercial real estate loans. Securities available for sale were $2.33 billion at March 31, 2017, an increase of $52.8 million from December 31, 2016. Total liabilities were $8.25 billion as of March 31, 2017, a decrease of $6.7 million from $8.26 billion at December 31, 2016. The decrease was primarily due to decreased securities sold under agreements to repurchase, partially offset by an increase in deposits.
Investment Securities Available for Sale
At March 31, 2017, the Company held investment securities totaling $2.33 billion compared to $2.28 billion at December 31, 2016. The increase in the investment securities portfolio from year-end is due to $109.0 million in purchases and a $2.7 million decrease in net unrealized loss of securities in the portfolio, partially offset by $55.4 million in principal payments and maturities and $3.5 million in premium amortization. The average duration of our investment portfolio was approximately 3 years and 11 months at March 31, 2017. This duration takes into account calls, where appropriate, and consensus prepayment speeds.
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The investment securities are used by the Company as a component of its balance sheet management strategies. From time-to-time, securities may be sold to reposition the portfolio in response to strategies developed by the Company’s asset liability management committee. In accordance with our investment strategy, management monitors market conditions with a view to realize gains on its available for sale securities portfolio when prudent.
The Company performs a quarterly assessment of the debt and equity securities in its investment portfolio that have an unrealized loss to determine whether the decline in the fair value of these securities below their amortized cost basis is other-than-temporary. Impairment is considered other-than-temporary when it becomes probable that the Company will be unable to recover the entire amortized cost basis of its investment. The Company’s impairment assessment takes into consideration factors such as the length of time and the extent to which the market value has been less than cost, defaults or deferrals of scheduled interest or principal, external credit ratings and recent downgrades, internal assessment of credit quality, and whether the Company intends to sell the security and whether it is more likely than not it will be required to sell the security prior to recovery of its amortized cost basis. If a decline in fair value is judged to be other-than-temporary, the cost basis of the individual security is written down to fair value which then becomes the new cost basis. The new cost basis is not adjusted for subsequent recoveries in fair value.
When there are credit losses associated with an impaired debt security and the Company does not have the intent to sell the security and it is more likely than not that it will not have to sell the security before recovery of its cost basis, the Company will separate the amount of the impairment into the amount that is credit-related and the amount related to non-credit factors. The credit-related impairment is recognized in earnings and the non-credit-related impairment is recognized in accumulated other comprehensive income.
At March 31, 2017, the market value of securities available for sale had a net unrealized loss of $17.8 million compared to a net unrealized loss of $20.5 million at December 31, 2016. The change in valuation was the result of fluctuations in market interest rates subsequent to purchase. At March 31, 2017, the Company had $1.56 billion of investment securities with gross unrealized losses of $28.8 million; however, we did not consider these investment securities to be other-than-temporarily impaired.
The following table sets forth our securities portfolio by type for the dates indicated:

|  | March 31, 2017 |  | December 31, 2016
|  | (in thousands)
Securities Available for Sale |  |  |  |
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations |  | $ | 1,486,498 |  |  | $ | 1,465,732 |
State and municipal securities |  | 487,355 |  |  | 475,060 |
U.S. government and government-sponsored enterprise securities |  | 352,183 |  |  | 331,902 |
U.S. government securities |  | 252 |  |  | 800 |
Other securities |  | 5,071 |  |  | 5,083 |
Total |  | $ | 2,331,359 |  |  | $ | 2,278,577 |

For further information on our investment portfolio, see Note 3 of the Consolidated Financial Statements in “Item 1. Financial Statements (unaudited)” of this report.
Credit Risk Management
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, 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.
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.
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
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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, 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 “Allowance for Loan and Lease Losses” section in this Management’s Discussion and Analysis and Note 1 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of the Company’s 2016 Annual Report on Form 10-K.
Loan policies, credit quality criteria, portfolio guidelines and other controls are established under the guidance of our Chief Credit Officer and approved, as appropriate, by the board of directors. Credit Administration, together with the 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.
Loan Portfolio Analysis
Our wholly owned banking subsidiary Columbia State Bank is a full service commercial bank, which originates a wide variety of loans, and focuses its lending efforts on originating commercial business and commercial real estate loans.
The following table sets forth the Company’s loan portfolio by type of loan for the dates indicated:

|  | March 31, 2017 |  | % of Total |  | December 31, 2016 |  | % of Total
|  | (dollars in thousands)
Commercial business |  | $ | 2,559,247 |  |  | 41.1 | % |  | $ | 2,551,054 |  |  | 41.1 | %
Real estate: |  |  |  |  |  |  |  |
One-to-four family residential |  | 172,581 |  |  | 2.8 | % |  | 170,331 |  |  | 2.7 | %
Commercial and multifamily residential |  | 2,783,433 |  |  | 44.7 | % |  | 2,719,830 |  |  | 43.7 | %
Total real estate |  | 2,956,014 |  |  | 47.5 | % |  | 2,890,161 |  |  | 46.4 | %
Real estate construction: |  |  |  |  |  |  |  |
One-to-four family residential |  | 115,219 |  |  | 1.8 | % |  | 121,887 |  |  | 2.0 | %
Commercial and multifamily residential |  | 172,895 |  |  | 2.8 | % |  | 209,118 |  |  | 3.4 | %
Total real estate construction |  | 288,114 |  |  | 4.6 | % |  | 331,005 |  |  | 5.4 | %
Consumer |  | 318,069 |  |  | 5.1 | % |  | 329,261 |  |  | 5.3 | %
Purchased credit impaired |  | 138,904 |  |  | 2.2 | % |  | 145,660 |  |  | 2.3 | %
Subtotal |  | 6,260,348 |  |  | 100.5 | % |  | 6,247,141 |  |  | 100.5 | %
Less: Net unearned income |  | (32,212 | ) |  | (0.5 | )% |  | (33,718 | ) |  | (0.5 | )%
Loans, net of unearned income (before Allowance for Loan and Lease Losses) |  | $ | 6,228,136 |  |  | 100.0 | % |  | $ | 6,213,423 |  |  | 100.0 | %
Loans held for sale |  | $ | 3,245 |  |  |  |  | $ | 5,846 |  |  |

Total loans increased $14.7 million from year-end 2016. The loan growth from substantial new loan production during the first quarter was tempered by contractual payments and prepayments. The loan portfolio continues to be diversified, with the intent to mitigate risk by monitoring concentration in any one sector. The $32.2 million in unearned income recorded at March 31, 2017 was comprised of $18.3 million in net purchase discounts and $13.9 million in deferred loan fees. The $33.7 million in unearned income recorded at December 31, 2016 consisted of $20.2 million in net purchase discounts and $13.5 million in deferred loan fees.
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The following table provides additional detail related to the net discount of acquired and purchased loans, excluding PCI loans, by acquisition:

|  | March 31, 2017 |  | December 31, 2016
Acquisition: |  | (in thousands)
Intermountain |  | $ | 6,346 |  |  | $ | 6,599 |
West Coast |  | 12,246 |  |  | 13,957 |
Other |  | (291 | ) |  | (315 | )
Total net discount at period end |  | $ | 18,301 |  |  | $ | 20,241 |

Commercial 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, 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.
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 Acquired with Deteriorated Credit Quality (“ASC 310-30”).
For additional information on our loan portfolio, including amounts pledged as collateral on borrowings, see Note 4 to the Consolidated Financial Statements in “Item 1. Financial Statements (unaudited)” of this report.
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) other personal property owned, if applicable.
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The following table sets forth, at the dates indicated, information with respect to our nonaccrual loans and total nonperforming assets:

|  | March 31, 2017 |  | December 31, 2016
|  | (in thousands)
Nonperforming assets |  |  |  |
Nonaccrual loans: |  |  |  |
Commercial business |  | $ | 10,848 |  |  | $ | 11,555 |
Real estate: |  |  |  |
One-to-four family residential |  | 450 |  |  | 568 |
Commercial and multifamily residential |  | 10,237 |  |  | 11,187 |
Total real estate |  | 10,687 |  |  | 11,755 |
Real estate construction: |  |  |  |
One-to-four family residential |  | 213 |  |  | 563 |
Total real estate construction |  | 213 |  |  | 563 |
Consumer |  | 3,799 |  |  | 3,883 |
Total nonaccrual loans |  | 25,547 |  |  | 27,756 |
Other real estate owned and other personal property owned |  | 4,519 |  |  | 5,998 |
Total nonperforming assets |  | $ | 30,066 |  |  | $ | 33,754 |
Loans, net of unearned income |  | $ | 6,228,136 |  |  | $ | 6,213,423 |
Total assets |  | $ | 9,527,272 |  |  | $ | 9,509,607 |
Nonperforming loans to period end loans |  | 0.41 | % |  | 0.45 | %
Nonperforming assets to period end assets |  | 0.32 | % |  | 0.35 | %

At March 31, 2017, nonperforming assets were $30.1 million, compared to $33.8 million at December 31, 2016. Nonperforming assets decreased $3.7 million during the three months ended March 31, 2017. This decline was due to principal pay downs and charge-offs of nonaccrual loans as well as OREO sales.
Other Real Estate Owned: The following table sets forth activity in OREO for the periods indicated:

|  | Three Months Ended March 31,
|  | 2017 |  | 2016
|  | (in thousands)
Balance, beginning of period |  | $ | 5,998 |  |  | $ | 13,738 |
Transfers in |  | — |  |  | 105 |
Valuation adjustments |  | (193 | ) |  | (137 | )
Proceeds from sale of OREO property |  | (1,275 | ) |  | (1,326 | )
Gain (loss) on sale of OREO, net |  | (11 | ) |  | 47 |
Balance, end of period |  | $ | 4,519 |  |  | $ | 12,427 |

Allowance for Loan and Lease Losses
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 management to be sufficient to absorb estimated probable losses related to these unfunded credit facilities at the balance sheet date.
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At March 31, 2017, our allowance was $71.0 million, or 1.14% 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 and an allowance of $69.3 million or 1.18% of total loans (excluding loans held for sale) at March 31, 2016.
The following table provides an analysis of the Company’s allowance for loans at the dates and the periods indicated:

|  | Three Months Ended March 31,
|  | 2017 |  | 2016
|  | (in thousands)
Beginning balance |  | $ | 70,043 |  |  | $ | 68,172 |
Charge-offs: |  |  |  |
Commercial business |  | (1,127 | ) |  | (3,773 | )
One-to-four family residential |  | (307 | ) |  | — |
One-to-four family residential construction |  | (14 | ) |  | — |
Consumer |  | (428 | ) |  | (266 | )
Purchased credit impaired |  | (1,939 | ) |  | (2,866 | )
Total charge-offs |  | (3,815 | ) |  | (6,905 | )
Recoveries: |  |  |  |
Commercial business |  | 365 |  |  | 662 |
One-to-four family residential |  | 117 |  |  | 41 |
Commercial and multifamily residential |  | 78 |  |  | 69 |
One-to-four family residential construction |  | 29 |  |  | 254 |
Commercial and multifamily residential construction |  | — |  |  | 1 |
Consumer |  | 285 |  |  | 165 |
Purchased credit impaired |  | 1,144 |  |  | 1,551 |
Total recoveries |  | 2,018 |  |  | 2,743 |
Net charge-offs |  | (1,797 | ) |  | (4,162 | )
Provision for loan and lease losses |  | 2,775 |  |  | 5,254 |
Ending balance |  | $ | 71,021 |  |  | $ | 69,264 |
Total loans, net at end of period, excluding loans held of sale |  | $ | 6,228,136 |  |  | $ | 5,877,283 |
Allowance for loan and lease losses to period-end loans |  | 1.14 | % |  | 1.18 | %
Allowance for unfunded commitments and letters of credit |  |
Beginning balance |  | $ | 2,705 |  |  | $ | 2,930 |
Net changes in the allowance for unfunded commitments and letters of credit |  | 850 |  |  | — |
Ending balance |  | $ | 3,555 |  |  | $ | 2,930 |

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Liquidity and Sources of Funds
Our primary sources of funds are customer deposits. Additionally, we utilize advances from the FHLB of Des Moines (“FHLB”), the Federal Reserve Bank of San Francisco (“FRB”), and term and sweep repurchase agreements to supplement our funding needs. These funds, together with loan repayments, loan sales, retained earnings, equity and other borrowed funds are used to make loans, to acquire securities and other assets and to fund continuing operations.
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 one or more offerings. Specific information regarding the terms of and the securities being offered will be provided at the time of any offering. Proceeds from any future offerings are expected to be used for general corporate purposes, including, but not 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.
Deposit Activities
Our deposit products include a wide variety of transaction accounts, savings accounts and time deposit accounts. Core deposits (demand deposit, savings, money market accounts and certificates of deposit less than $250,000) increased $45.0 million from year-end 2016.
We have established a branch system to serve our consumer and business depositors. In addition, management’s strategy for funding asset growth is to make use of brokered and other wholesale deposits on an as-needed basis. The Company participates in the Certificate of Deposit Account Registry Service (CDARS®) program. CDARS® is a network that allows participating banks to offer extended FDIC deposit insurance coverage on time deposits. The Company also participates in a similar program to offer extended FDIC deposit insurance coverage on money market accounts. These extended deposit insurance programs are generally available only to existing customers and are not used as a means of generating additional liquidity. At March 31, 2017, CDARS® deposits and brokered money market deposits were $219.8 million, or 3% of total deposits, compared to $230.4 million at year-end 2016. The brokered deposits have varied maturities.
The following table sets forth the Company’s deposit base by type of product for the dates indicated:

|  | March 31, 2017 |  | December 31, 2016
|  | Balance |  | % of Total |  | Balance |  | % of Total
|  | (dollars in thousands)
Core deposits: |  |  |  |  |  |  |  |
Demand and other noninterest-bearing |  | $ | 3,958,106 |  |  | 48.9 | % |  | $ | 3,944,495 |  |  | 48.9 | %
Interest-bearing demand |  | 985,954 |  |  | 12.2 | % |  | 985,293 |  |  | 12.2 | %
Money market |  | 1,798,034 |  |  | 22.2 | % |  | 1,791,283 |  |  | 22.2 | %
Savings |  | 759,002 |  |  | 9.4 | % |  | 723,667 |  |  | 9.0 | %
Certificates of deposit, less than $250,000 |  | 293,494 |  |  | 3.6 | % |  | 304,830 |  |  | 3.8 | %
Total core deposits |  | 7,794,590 |  |  | 96.3 | % |  | 7,749,568 |  |  | 96.1 | %
Certificates of deposit, $250,000 or more |  | 74,460 |  |  | 0.9 | % |  | 79,424 |  |  | 1.0 | %
Certificates of deposit insured by CDARS® |  | 20,994 |  |  | 0.3 | % |  | 22,039 |  |  | 0.3 | %
Brokered money market accounts |  | 198,768 |  |  | 2.5 | % |  | 208,348 |  |  | 2.6 | %
Subtotal |  | 8,088,812 |  |  | 100.0 | % |  | 8,059,379 |  |  | 100.0 | %
Premium resulting from acquisition date fair value adjustment |  | 15 |  |  |  |  | 36 |  |  |
Total deposits |  | $ | 8,088,827 |  |  |  |  | $ | 8,059,415 |  |  |

Borrowings
We rely on FHLB advances and FRB borrowings as another source of both short and long-term funding. FHLB advances and FRB borrowings are secured by investment securities, and residential, commercial and commercial real estate loans. At March 31, 2017, we had FHLB advances of $15.5 million compared to $6.5 million at December 31, 2016.
We also utilize wholesale and retail repurchase agreements to supplement our funding sources. Our wholesale repurchase agreements are secured by mortgage-backed securities. At March 31, 2017 and December 31, 2016, we had deposit customer sweep-related repurchase agreements of $21.9 million and $55.8 million, respectively, which mature on a daily basis as well as
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a $25.0 million term repurchase agreement, which matures in 2018. Management anticipates we will continue to rely on FHLB advances, FRB borrowings and wholesale and retail repurchase agreements in the future and we will use those funds primarily to make loans and purchase securities.
Contractual Obligations, Commitments & Off-Balance Sheet Arrangements
We are party to many contractual financial obligations, including repayment of borrowings, operating and equipment lease payments, off-balance sheet commitments to extend credit and investments in affordable housing partnerships. At March 31, 2017, we had commitments to extend credit of $2.28 billion compared to $2.22 billion at December 31, 2016.
Capital Resources
Shareholders’ equity at March 31, 2017 was $1.28 billion, an increase from $1.25 billion at December 31, 2016. Shareholders’ equity was 13% of total period-end assets at March 31, 2017 and December 31, 2016.
Regulatory Capital. In July 2013, the federal bank regulators approved the New Capital Rules (as discussed in our 2016 Annual Report on Form 10-K, “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 March 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.
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 March 31, 2017 and December 31, 2016.
The following table presents the capital ratios and the capital conservation buffer, as applicable, for the Company and its banking subsidiary at March 31, 2017 and December 31, 2016:

|  | Company |  | Columbia Bank
|  | March 31, 2017 |  | December 31, 2016 |  | March 31, 2017 |  | December 31, 2016
Common equity tier 1 (CET1) risk-based capital ratio |  | 12.0318 | % |  | 11.6450 | % |  | 11.8563 | % |  | 11.5051 | %
Tier 1 risk-based capital ratio |  | 12.0318 | % |  | 11.6646 | % |  | 11.8563 | % |  | 11.5051 | %
Total risk-based capital ratio |  | 13.0398 | % |  | 12.6347 | % |  | 12.8650 | % |  | 12.4756 | %
Leverage ratio |  | 9.7863 | % |  | 9.5526 | % |  | 9.6438 | % |  | 9.4275 | %
Capital conservation buffer |  | 5.0398 | % |  | 4.6347 | % |  | 4.8650 | % |  | 4.4756 | %

Stock Repurchase Program
On June 22, 2016, the Board of Directors approved a stock repurchase program which succeeds the prior program that was adopted in October 2011. The program authorizes the Company to repurchase up to 2.9 million shares of our outstanding common stock, representing approximately 5% of the common shares outstanding. 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.
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Non-GAAP Financial Measures
The Company considers operating net interest margin (tax equivalent) to be a useful measurement as it more closely reflects the ongoing operating performance of the Company. Additionally, 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 (tax equivalent) to the Company, 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:

|  | Three Months Ended March 31,
|  | 2017 |  | 2016
Operating net interest margin non-GAAP reconciliation: |  | (dollars in thousands)
Net interest income (tax equivalent) (1) |  | $ | 89,518 |  |  | $ | 82,661 |
Adjustments to arrive at operating net interest income (tax equivalent): |  |  |  |
Incremental accretion income on FDIC purchased credit impaired loans |  | (2,117 | ) |  | (1,657 | )
Incremental accretion income on other acquired loans |  | (1,948 | ) |  | (3,073 | )
Premium amortization on acquired securities |  | 1,462 |  |  | 2,324 |
Interest reversals on nonaccrual loans |  | 265 |  |  | 453 |
Operating net interest income (tax equivalent) (1) |  | $ | 87,180 |  |  | $ | 80,708 |
Average interest earning assets |  | $ | 8,520,291 |  |  | $ | 8,005,945 |
Net interest margin (tax equivalent) (1) |  | 4.20 | % |  | 4.13 | %
Operating net interest margin (tax equivalent) (1) |  | 4.09 | % |  | 4.03 | %

__________
(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 $2.8 million and $2.5 million for the three months ended March 31, 2017 and 2016, respectively.
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Item 3. | QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

A number of measures are used to monitor and manage interest rate risk, including income simulations and interest sensitivity (gap) analysis. 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. Basic assumptions in the model include prepayment speeds on mortgage-related assets, cash flows and maturities of other investment securities, loan and deposit volumes and pricing. These assumptions are inherently subjective and, as a result, the model cannot precisely estimate net interest income or precisely predict the impact of higher or lower interest rates on net interest income. Actual results will differ from simulated results due to timing, magnitude and frequency of interest rate changes and changes in market conditions and management strategies, among other factors. At March 31, 2017, based on the measures used to monitor and manage interest rate risk, there has not been a material change in the Company’s interest rate risk since December 31, 2016. For additional information, refer to Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in the Company’s 2016 Annual Report on Form 10-K.

Item 4. | 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 the Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”), of the effectiveness of our disclosure controls and 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 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.
Changes in Internal Control Over Financial Reporting
There was no change in our internal controls over financial reporting during our most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.
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PART II - OTHER INFORMATION

Item 1. | 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 1A. RISK FACTORS
Refer to Item 1A of Part I of the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 for a discussion of risk factors relating to the Company’s business. The Company believes that there has been no material change in its risk factors as previously disclosed in the Company’s Form 10-K.

Item 2. | UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

(a) | 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 into 102,362 shares of Company common stock. The shares of common stock were exempt form registration in reliance on Section 3(a)(9) of the Securities Act of 1933.

(b) | Not applicable

(c) | The following table provides information about repurchases of common stock by the Company during the quarter ended March 31, 2017:

Period |  | Total Number of Common Shares Purchased (1) |  | Average Price Paid per Common Share |  | Total Number of Shares Purchased as Part of Publicly Announced Plan (2) |  | Maximum Number of Remaining Shares That May Yet Be Purchased Under the Plan (2)
1/1/2017 - 1/31/2017 |  | 700 |  |  | $ | 40.83 |  |  | — |  |  | 2,900,000 |
2/1/2017 - 2/28/2017 |  | 48,258 |  |  | 40.86 |  |  | — |  |  | 2,900,000 |
3/1/2017 - 3/31/2017 |  | 961 |  |  | 40.33 |  |  | — |  |  | 2,900,000 |
|  | 49,919 |  |  | $ | 40.85 |  |  | — |  |  |

(1) | Common shares repurchased by the Company during the quarter consisted of cancellation of 49,919 shares of common stock to pay the shareholders’ withholding taxes.

(2) | The repurchase plan, which was approved in 2016, authorized the Company to repurchase up to 2.9 million shares of its outstanding common stock.

Item 3. | DEFAULTS UPON SENIOR SECURITIES

None.

Item 4. | MINE SAFETY DISCLOSURES

Not applicable.

Item 5. | OTHER INFORMATION

None.
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Item 6. | EXHIBITS

2.1* |  | Agreement and Plan of Merger, dated as of January 9, 2017, by and between Columbia Banking System, Inc. and Pacific Continental Corporation (Incorporated by reference to Exhibit 2.1 of the Company’s Current Report on Form 8-K filed January 10, 2017)
31.1+ |  | Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2+ |  | Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32+ |  | Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101+ |  | The following financial information from Columbia Banking System, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2017 is formatted in XBRL: (i) the Unaudited Consolidated Balance Sheets, (ii) the Unaudited Consolidated Statements of Income, (iii) the Unaudited Consolidated Statements of Comprehensive Income, (iv) the Unaudited Consolidated Statements of Changes in Shareholders’ Equity, (v) the Unaudited Consolidated Statements of Cash Flows, and (vi) the Notes to Unaudited Consolidated Financial Statements.

+ Filed herewith
* The disclosure schedules and exhibits have been omitted pursuant to Item 601 (b)(2) of Regulation S-K. Columbia agrees to furnish supplementally a copy of any omitted schedule or exhibit to the SEC upon request.
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SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the Company has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

|  |  | COLUMBIA BANKING SYSTEM, INC.
Date: | May 5, 2017 |  | By |  | /s/ HADLEY S. ROBBINS
|  |  |  |  | Hadley S. Robbins
|  |  |  |  | Executive Vice President and Interim Chief Executive Officer (Principal Executive Officer)
Date: | May 5, 2017 |  | By |  | /s/ CLINT E. STEIN
|  |  |  |  | Clint E. Stein
|  |  |  |  | Executive Vice President and Chief Financial Officer (Principal Financial Officer)
Date: | May 5, 2017 |  | By |  | /s/ BARRY S. RAY
|  |  |  |  | Barry S. Ray
|  |  |  |  | Senior Vice President and Chief Accounting Officer (Principal Accounting Officer)

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INDEX TO EXHIBITS

2.1* |  | Agreement and Plan of Merger, dated as of January 9, 2017, by and between Columbia Banking System, Inc. and Pacific Continental Corporation (Incorporated by reference to Exhibit 2.1 of the Company’s Current Report on Form 8-K filed January 10, 2017)
31.1+ |  | Certification of Interim Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2+ |  | Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32+ |  | Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101+ |  | The following financial information from Columbia Banking System, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2017 is formatted in XBRL: (i) the Unaudited Consolidated Balance Sheets, (ii) the Unaudited Consolidated Statements of Income, (iii) the Unaudited Consolidated Statements of Comprehensive Income, (iv) the Unaudited Consolidated Statements of Changes in Shareholders’ Equity, (v) the Unaudited Consolidated Statements of Cash Flows, and (vi) the Notes to Unaudited Consolidated Financial Statements.

+ Filed herewith
* The disclosure schedules and exhibits have been omitted pursuant to Item 601 (b)(2) of Regulation S-K. Columbia agrees to furnish supplementally a copy of any omitted schedule or exhibit to the SEC upon request.
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