Columbia Banking System (COLB) 10-Q 5 May 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	Apr. 30, 2017
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Entity Registrant Name	COLUMBIA BANKING SYSTEM INC
Entity Central Index Key	887,343
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		58,343,431

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) shares in Thousands, $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
ASSETS
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
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:
Preferred Stock, Shares Authorized		2,000	2,000
Preferred Stock, Shares Issued		0	9
Preferred Stock, Value, Issued		$ 0	$ 2,217
Authorized shares		115,000	115,000
Common Stock Shares Issued And Outstanding		58,329	58,042
Common Stock (no par value)		$ 999,702	$ 995,837
Retained earnings		288,247	271,957
Accumulated other comprehensive loss	[1]	(12,606)	(18,999)
Total shareholders’ equity		1,275,343	1,251,012
Total liabilities and shareholders’ equity		$ 9,527,272	$ 9,509,607
[1]	All amounts are net of tax. Amounts in parenthesis indicate debits.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Securities available-for-sale, amortized cost	$ 2,349,149	$ 2,299,037
Less: unearned income on loans	$ (32,212)	$ (33,718)
Common stock, par value	$ 0	$ 0
Authorized shares	115,000	115,000
Common stock, shares outstanding	58,329	58,042

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
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	0	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 (benefit) 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 ($ per share)	$ 0.50	$ 0.37
Diluted ($ per share)	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

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Net income		$ 29,199	$ 21,259
Unrealized gain from securities:
Net unrealized holding loss from available for sale securities arising during the period		1,702	18,770
Reclassification adjustment of net gain from sale of available for sale securities included in income		0	(238)
Net unrealized gain from securities, net of reclassification adjustment		1,702	18,532
Pension plan liability adjustment:
Unrecognized net actuarial gain (loss) during the period		4,604	0
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost		87	106
Pension plan liability adjustment, net		4,691	106
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	[1]	6,393	18,638
Total comprehensive income		$ 35,592	$ 39,897
[1]	All amounts are net of tax. Amounts in parenthesis indicate debits.

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax	$ (968)	$ (10,686)
Reclassification adjustment of net gain from sale of available for sale securities included in income, tax	0	135
Net unrealized loss from unfunded defined benefit plan liability arising during the period, tax	(2,622)	0
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax	$ (49)	$ (61)

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Preferred Stock [Member]
Balance, value at Dec. 31, 2015	$ 1,242,128	$ 990,281	$ 255,925	$ (6,295)	$ 2,217
Balance, shares at Dec. 31, 2015		57,724,000			9,000
Net income	21,259		21,259
Other comprehensive income	18,638			18,638
Issuance of common stock - stock option and other plans, value		$ 598
Issuance of common stock - stock option and other plans, shares		20,000
Issuance of common stock - restricted stock awards, net of cancelled awards, value		$ 1,180
Issuance of common stock - restricted stock awards, net of cancelled awards, shares		299,000
Stock Repurchased and Retired During Period, Value		$ (1,033)
Stock Repurchased During Period, Shares		(35,000)
Dividends, Preferred Stock, Cash			(39)
Cash dividends paid on common stock	(21,943)		(21,943)
Balance, value at Mar. 31, 2016	1,260,788	$ 991,026	255,202	12,343	$ 2,217
Balance, shares at Mar. 31, 2016		58,008,000			9,000
Cumulative Effect of New Accounting Principle in Period of Adoption	67	$ 184	(117)
Balance, value at Dec. 31, 2016	1,251,012	$ 995,837	271,957	(18,999)	$ 2,217
Balance, shares at Dec. 31, 2016		58,042,000			8,782
Net income	29,199		29,199
Other comprehensive income	6,393			6,393
Issuance of common stock - stock option and other plans, value	1,145	$ 1,145
Issuance of common stock - stock option and other plans, shares		28,000
Issuance of common stock - restricted stock awards, net of cancelled awards, value	2,358	$ 2,358
Conversion of Stock, Shares Converted					(9,000)
Conversion of Stock, Amount Converted					$ (2,217)
Conversion of Stock, New Issuance		102,000
Conversion of Stock, Amount Issued	0	$ 2,217
Issuance of common stock - restricted stock awards, net of cancelled awards, shares		207,000
Stock Repurchased and Retired During Period, Value	(2,039)	$ (2,039)
Stock Repurchased During Period, Shares		(50,000)
Cash dividends paid on common stock	(12,792)		(12,792)
Balance, value at Mar. 31, 2017	$ 1,275,343	$ 999,702	$ 288,247	$ (12,606)	$ 0
Balance, shares at Mar. 31, 2017		58,329,000			0

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
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	0	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)
Purchases of premises and equipment	(336)	(445)
Payments to Acquire Federal Home Loan Bank Stock	(31,400)	(10,520)
Proceeds from FDIC for reimbursement on loss-sharing asset	26	258
Proceeds from sales of securities available for sale	0	38,876
Proceeds from principal repayments and maturities of securities available for sale	55,369	52,422
Proceeds from Sales of Assets, Investing Activities	6,893	1,911
Proceeds from Sale of Federal Home Loan Bank Stock	31,040	13,001
Proceeds from 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
Proceeds from exercise of stock options	1,145	598
Repayment of Federal Home Loan Bank advances	(776,000)	(227,000)
Payment of common stock dividends	(12,792)	(21,943)
Preferred stock dividends	0	(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
Supplemental Information:
Cash paid for interest	1,150	1,059
Cash paid for income tax	0	6,350
Non-cash investing and financing activities
Loans transferred to other real estate owned	$ 0	$ 105

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	3 Months Ended
	Mar. 31, 2017
Basis of Presentation And Significant Accounting Policies
Basis of Presentation and Significant Accounting Policies	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 .

Accounting Pronouncements Recen

Accounting Pronouncements Recently Issued	3 Months Ended
	Mar. 31, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Accounting Pronouncements Recently Issued	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 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.

Securities

Securities	3 Months Ended
	Mar. 31, 2017
Available-for-sale Securities [Abstract]
Securities	Securities The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of securities available for sale: Amortized Gross Gross 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 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 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 Unrealized Fair Unrealized Fair Unrealized (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 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.

Loans

Loans	3 Months Ended
	Mar. 31, 2017
Loans Receivable, Net [Abstract]
Loans	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. The following is an analysis of nonaccrual loans as of March 31, 2017 and December 31, 2016 : March 31, 2017 December 31, 2016 Recorded Unpaid Principal Recorded Unpaid Principal (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 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 30 - 59 60 - 89 Greater Total Nonaccrual 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 30 - 59 60 - 89 Greater Total Nonaccrual 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 The following is an analysis of impaired loans as of March 31, 2017 and December 31, 2016 : Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid 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 Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid 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 The following table provides additional information on impaired loans for the three month periods indicated: Three Months Ended March 31, 2017 2016 Average Recorded Interest Recognized Average Recorded Interest Recognized (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 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 Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (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. 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

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit	3 Months Ended
	Mar. 31, 2017
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit Text Block	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 . The following tables show a detailed analysis of the allowance for the three months ended March 31, 2017 and 2016 : Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General 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 Charge-offs Recoveries Provision (Recovery) Ending Specific General 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 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. 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 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

Other Real Estate Owned

Other Real Estate Owned	3 Months Ended
	Mar. 31, 2017
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]
Other Real Estate Owned	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 .

Covered Assets and FDIC Loss-sh

Covered Assets and FDIC Loss-sharing Asset	3 Months Ended
	Mar. 31, 2017
Covered Assets And FDIC Loss Sharing Asset
Covered Assets and FDIC Loss sharing Asset	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. 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

Goodwill and Intangible Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	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 . 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

Derivatives and Balance Sheet O

Derivatives and Balance Sheet Offsetting	3 Months Ended
	Mar. 31, 2017
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Derivatives and Hedging Activities	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 Fair Value Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value (in thousands) Interest rate contracts Other assets $ 8,598 Other assets $ 9,012 Other liabilities $ 8,618 Other liabilities $ 9,036 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.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	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. 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.

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2017
Stockholders' Equity Note [Abstract]
Shareholders' Equity	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.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Abstract]
Accumulated Other Comprehensive Income	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

Fair Value Accounting and Measu

Fair Value Accounting and Measurement	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Accounting and Measurement	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. 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. 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 Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended Level 1 Level 2 Level 3 (in thousands) OREO $ 1,260 $ — $ — $ 1,260 $ 193 $ 1,260 $ — $ — $ 1,260 $ 193 Fair value at Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended 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. 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 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 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. 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. 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 Fair 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 Fair 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 —

Earnings per Common Share

Earnings per Common Share	3 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Earnings Per Common Share	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. 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

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2017
Available-for-sale Securities [Abstract]
Securities Available for Sale	The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of securities available for sale: Amortized Gross Gross 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
Schedule of gross realized gains and losses on sales and calls of securities available for sale	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
Schedule of Contractual Maturities of Investment Securities Available for Sale	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
Carrying Value of Securities Pledged As Collateral	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
Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses	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 Unrealized Fair Unrealized Fair Unrealized (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 )

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Analysis of Loan Portfolio by Major Types of 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
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Analysis of Nonaccrual Loans	The following is an analysis of nonaccrual loans as of March 31, 2017 and December 31, 2016 : March 31, 2017 December 31, 2016 Recorded Unpaid Principal Recorded Unpaid Principal (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
Analysis of the Aged Loan Portfolio	The following is an aging of the recorded investment of the loan portfolio as of March 31, 2017 and December 31, 2016 : Current 30 - 59 60 - 89 Greater Total Nonaccrual 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 30 - 59 60 - 89 Greater Total Nonaccrual 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
Impaired Financing Receivables	The following is an analysis of impaired loans as of March 31, 2017 and December 31, 2016 : Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid 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 Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid 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 The following table provides additional information on impaired loans for the three month periods indicated: Three Months Ended March 31, 2017 2016 Average Recorded Interest Recognized Average Recorded Interest Recognized (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
Analysis of loans classified as Troubled Debt Restructurings (“TDR”)	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 Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (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
Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Analysis of Loan Portfolio by Major Types of Loans	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
Changes in Accretable Yield for Acquired Loans	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

Allowance for Loan and Lease 25

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Tables)	3 Months Ended
	Mar. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Credit Losses on Financing Receivables	The following tables show a detailed analysis of the allowance for the three months ended March 31, 2017 and 2016 : Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General 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 Charge-offs Recoveries Provision (Recovery) Ending Specific General 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
Changes in the Allowance for Unfunded Commitments and Letters of Credit	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
Financing Receivable Credit Quality Indicators	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 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

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	3 Months Ended
	Mar. 31, 2017
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]
Summary of Other Real Estate Owned	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

Covered Assets and FDIC Loss-27

Covered Assets and FDIC Loss-sharing Asset (Tables)	3 Months Ended
	Mar. 31, 2017
Covered Assets And FDIC Loss Sharing Asset [Line Items]
FDIC Loss-sharing Asset	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
Schedule of FDIC Loss-Sharing Agreements and Covered Assets [Table Text Block]	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

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill and Intangible Assets	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
Estimated Future Amortization Expense of Core Deposit Intangibles	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

Derivatives and Balance Sheet29

Derivatives and Balance Sheet Offsetting (Tables)	3 Months Ended
	Mar. 31, 2017
Derivative [Line Items]
Balance Sheet Offsetting [Table Text Block]	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 ) $ —
Carrying Value of Securities Pledged As Collateral	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
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	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 Fair Value Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value (in thousands) Interest rate contracts Other assets $ 8,598 Other assets $ 9,012 Other liabilities $ 8,618 Other liabilities $ 9,036
Available-for-sale Securities [Member]
Derivative [Line Items]
Carrying Value of Securities Pledged As Collateral	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 $ —

Accumulated Other Comprehensi30

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	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.
Schedule of reclassifications from accumulated other comprehensive income [Table Text Block]	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

Fair Value Accounting and Mea31

Fair Value Accounting and Measurement (Tables)	3 Months Ended
	Mar. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets And Liabilities Accounted For Fair Value On Recurring Basis	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 $ —
Financial Assets Accounted For Fair Value On Nonrecurring Basis	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 Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended Level 1 Level 2 Level 3 (in thousands) OREO $ 1,260 $ — $ — $ 1,260 $ 193 $ 1,260 $ — $ — $ 1,260 $ 193 Fair value at Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended 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
Fair Value, by Balance Sheet Grouping	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 Fair 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 Fair 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 —
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Assets, Quantitative Information	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 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 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.

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	3 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Earnings Per Share	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

Securities (Securities Availabl

Securities (Securities Available for Sale) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds	$ 0	$ 38,900
Securities available-for-sale, amortized cost	2,349,149		$ 2,299,037
Available-for-sale Debt Securities Gross Unrealized Gain, instant	11,017		10,231
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(28,807)		(30,691)
Securities available for sale	2,331,359		2,278,577
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized cost	1,506,914		1,486,690
Available-for-sale Debt Securities Gross Unrealized Gain, instant	2,400		2,760
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(22,816)		(23,718)
Securities available for sale	1,486,498		1,465,732
State and Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized cost	484,376		473,914
Available-for-sale Debt Securities Gross Unrealized Gain, instant	7,316		6,343
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(4,337)		(5,197)
Securities available for sale	487,355		475,060
U.S. Government and Government-Sponsored Enterprise Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized cost	352,323		332,348
Available-for-sale Debt Securities Gross Unrealized Gain, instant	1,241		1,065
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(1,381)		(1,511)
Securities available for sale	352,183		331,902
US Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized cost	252		801
Available-for-sale Debt Securities Gross Unrealized Gain, instant	0		0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0		(1)
Securities available for sale	252		800
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized cost	5,284		5,284
Available-for-sale Debt Securities Gross Unrealized Gain, instant	60		63
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(273)		(264)
Securities available for sale	$ 5,071		$ 5,083

Securities (Schedule of Contrac

Securities (Schedule of Contractual Maturities of Investment Securities Available for Sale) (Details) $ in Thousands	Mar. 31, 2017USD ($)
Available-for-sale Securities [Abstract]
Due within one year, Amortized Cost	$ 53,518
Due after one year through five years, Amortized Cost	502,633
Due after five years through ten years, Amortized Cost	731,123
Due after ten years, Amortized Cost	1,056,591
No stated maturity date, Amortized Cost Basis	5,284
Total investment securities available-for-sale, Amortized Cost	2,349,149
Due within one year, Fair Value	53,606
Due after one year through five years, Fair Value	505,398
Due after five years through ten years, Fair Value	724,361
Due after ten years, Fair Value	1,042,923
No stated maturity date, Fair Value	5,071
Total investment securities available-for-sale, Fair Value	$ 2,331,359

Securities (Carrying Value of S

Securities (Carrying Value of Securities Pledged as Collateral) (Details) $ in Thousands	Mar. 31, 2017USD ($)
Schedule of Available-for-sale Securities [Line Items]
Carrying amount of securities pledged as collateral	$ 409,299
Washington and Oregon State Public Deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Carrying amount of securities pledged as collateral	228,794
Federal Reserve Bank Advances [Member]
Schedule of Available-for-sale Securities [Line Items]
Carrying amount of securities pledged as collateral	54,551
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Carrying amount of securities pledged as collateral	$ 125,954

Securities (Summary of Gross Un

Securities (Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities Gross Unrealized Gain, instant	$ 11,017	$ 10,231
Less than 12 Months Fair Value	1,398,191	1,461,783
Less than 12 Months Unrealized Losses	(22,701)	(25,415)
12 Months or More Fair Value	161,992	165,173
12 Months or More Unrealized Losses	(6,106)	(5,276)
Total Fair Value	1,560,183	1,626,956
Total Unrealized Losses	(28,807)	(30,691)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	28,807	30,691
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities Gross Unrealized Gain, instant	2,400	2,760
Less than 12 Months Fair Value	1,038,971	1,029,116
Less than 12 Months Unrealized Losses	(17,020)	(18,788)
12 Months or More Fair Value	155,846	159,046
12 Months or More Unrealized Losses	(5,796)	(4,930)
Total Fair Value	1,194,817	1,188,162
Total Unrealized Losses	(22,816)	(23,718)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	22,816	23,718
State and Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities Gross Unrealized Gain, instant	7,316	6,343
Less than 12 Months Fair Value	162,860	211,342
Less than 12 Months Unrealized Losses	(4,249)	(5,064)
12 Months or More Fair Value	3,412	3,384
12 Months or More Unrealized Losses	(88)	(133)
Total Fair Value	166,272	214,726
Total Unrealized Losses	(4,337)	(5,197)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	4,337	5,197
US Government Corporations and Agencies Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities Gross Unrealized Gain, instant	1,241	1,065
Less than 12 Months Fair Value	193,846	218,811
Less than 12 Months Unrealized Losses	(1,381)	(1,511)
12 Months or More Fair Value	0	0
12 Months or More Unrealized Losses	0	0
Total Fair Value	193,846	218,811
Total Unrealized Losses	(1,381)	(1,511)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	1,381	1,511
US Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities Gross Unrealized Gain, instant	0	0
Less than 12 Months Fair Value	251	251
Less than 12 Months Unrealized Losses	0	(1)
12 Months or More Fair Value	0	0
12 Months or More Unrealized Losses	0	0
Total Fair Value	251	251
Total Unrealized Losses	0	(1)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	1
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities Gross Unrealized Gain, instant	60	63
Less than 12 Months Fair Value	2,263	2,263
Less than 12 Months Unrealized Losses	(51)	(51)
12 Months or More Fair Value	2,734	2,743
12 Months or More Unrealized Losses	(222)	(213)
Total Fair Value	4,997	5,006
Total Unrealized Losses	(273)	(264)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	$ 273	$ 264

Securities (Narrative) (Details

Securities (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017USD ($)security	Mar. 31, 2016USD ($)
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds | $	$ 0	$ 38.9
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	198
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	52
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	142
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	5
U.S. Government and Government-Sponsored Enterprise Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	20
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	0
US Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number Of Securities In Continuous Loss Position For Twelve Months or More	0
Number Of Securities In Unrealized Loss Position	1
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	2
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	1

Securities Securities (Summary

Securities Securities (Summary of Gross Realized Gains and Gross Realized Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities, Gross Realized Gains	$ 0	$ 373
Available-for-sale Securities, Gross Realized Losses	0	0
Investment securities gains, net	$ 0	$ 373

Loans (Narrative) (Details)

Loans (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)contract	Dec. 31, 2016USD ($)
Financing Receivable, Recorded Investment [Line Items]
Loans to related parties	$ 10,100
Loans and Leases Receivable, Related Parties, Additions	75
Repayments on related party loans	$ 96
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract	0
Loans Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 2,280,000	$ 2,290,000
Federal Reserve Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 50,000	$ 54,200

Loans (Analysis of Loan Portfol

Loans (Analysis of Loan Portfolio by Major Types of Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Less: unearned income on loans	$ (32,212)	$ (33,718)
Recorded Investment	6,228,136	6,213,423
Allowance for loan losses	(71,021)	(70,043)	$ (69,264)	$ (68,172)
Loans, net	6,157,115	6,143,380
Loans held for sale	3,245	5,846
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Less: unearned income on loans	(32,212)	(33,718)
Recorded Investment	6,089,232	6,067,763
Allowance for loan losses	(61,626)	(59,528)
Loans, net	6,027,606	6,008,235
Loans held for sale	3,245	5,846
Loans and Leases Receivable, Gross	6,089,232	6,067,763
Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Less: unearned income on loans	0	0
Recorded Investment	138,904	145,660
Allowance for loan losses	(9,395)	(10,515)
Loans, net	129,509	135,145
Loans held for sale	0	0
Loans and Leases Receivable, Gross	148,883	157,251
Acquisition Accounting Valuation Discount on Covered Loans	9,979	11,591
Commercial and Multifamily Residential Construction [Domain] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	1,089	1,726
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage	187,550	188,193
Loans and Leases Receivable, Gross, Consumer, Construction	115,698	122,719
Allowance for loan losses	(645)	(599)	(654)	(916)
One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage	172,581	170,331
Loans and Leases Receivable, Gross, Consumer, Construction	115,219	121,887
Loans and Leases Receivable, Gross	170,199	167,932
One-to-Four Family Residential [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage	14,969	17,862
Loans and Leases Receivable, Gross, Consumer, Construction	479	832
Loans and Leases Receivable, Gross	17,608	20,643
Commercial and Multifamily Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Mortgage	2,871,960	2,809,061
Loans Receivable, Gross, Commercial, Construction	173,884	210,683
Commercial and Multifamily Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Mortgage	2,783,433	2,719,830
Loans Receivable, Gross, Commercial, Construction	172,895	209,118
Commercial and Multifamily Residential [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Mortgage	88,527	89,231
Loans Receivable, Gross, Commercial, Construction	989	1,565
Loans and Leases Receivable, Gross	92,930	94,795
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial and Industrial	2,578,294	2,571,239
Commercial Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial and Industrial	2,559,247	2,551,054
Commercial Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial and Industrial	19,047	20,185
Loans and Leases Receivable, Gross	20,292	21,606
Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Mortgage	3,059,510	2,997,254
Real Estate Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Mortgage	2,956,014	2,890,161
Real Estate Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Mortgage	103,496	107,093
Loans and Leases Receivable, Gross	110,538	115,438
One-to-Four Family Residential Construction [Domain] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	479	832
Real Estate Construction Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Construction	289,582	333,402
Real Estate Construction Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Construction	288,114	331,005
Real Estate Construction Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Construction	1,468	2,397
Loans and Leases Receivable, Gross	1,568	2,558
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer	332,962	345,246
Allowance for loan losses	(3,360)	(3,534)	$ (3,368)	$ (3,531)
Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer	318,069	329,261
Loans and Leases Receivable, Gross	314,235	324,522
Consumer Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer	14,893	15,985
Loans and Leases Receivable, Gross	$ 16,485	$ 17,649

Loans (Analysis of Nonaccrual L

Loans (Analysis of Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	$ 25,547	$ 27,756
Unpaid Principal Balance Nonaccrual Loans	42,528	42,289
Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	10,659	11,524
Unpaid Principal Balance Nonaccrual Loans	21,144	21,503
Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	189	31
Unpaid Principal Balance Nonaccrual Loans	457	303
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	450	568
Unpaid Principal Balance Nonaccrual Loans	1,703	1,302
Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	2,729	934
Unpaid Principal Balance Nonaccrual Loans	2,726	922
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	3,290	4,005
Unpaid Principal Balance Nonaccrual Loans	3,561	4,247
Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	4,218	6,248
Unpaid Principal Balance Nonaccrual Loans	8,544	9,030
Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	0	14
Unpaid Principal Balance Nonaccrual Loans	0	102
Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	213	549
Unpaid Principal Balance Nonaccrual Loans	213	549
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	3,799	3,883
Unpaid Principal Balance Nonaccrual Loans	$ 4,180	$ 4,331

Loans (Analysis of the Aged Loa

Loans (Analysis of the Aged Loan Portfolio) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	$ 25,547	$ 27,756
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	6,053,390	6,031,078
Past Due Loans	10,295	8,929
Nonaccrual Loans	25,547	27,756
Loans Receivable, Net	6,089,232	6,067,763
Secured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	10,659	11,524
Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	2,447,180	2,439,250
Past Due Loans	6,621	816
Nonaccrual Loans	10,659	11,524
Loans Receivable, Net	2,464,460	2,451,590
Unsecured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	189	31
Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	90,245	94,118
Past Due Loans	39	588
Nonaccrual Loans	189	31
Loans Receivable, Net	90,473	94,737
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	450	568
One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	168,634	164,416
Past Due Loans	1,115	2,948
Nonaccrual Loans	450	568
Loans Receivable, Net	170,199	167,932
Commercial Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	2,729	934
Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	280,562	269,816
Past Due Loans	0	64
Nonaccrual Loans	2,729	934
Loans Receivable, Net	283,291	270,814
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	3,290	4,005
Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,366,062	1,365,150
Past Due Loans	723	591
Nonaccrual Loans	3,290	4,005
Loans Receivable, Net	1,370,075	1,369,746
Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	4,218	6,248
Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,107,061	1,052,078
Past Due Loans	45	1,652
Nonaccrual Loans	4,218	6,248
Loans Receivable, Net	1,111,324	1,059,978
Land And Acquisition [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	0	14
Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	6,770	11,542
Past Due Loans	29	0
Nonaccrual Loans	0	14
Loans Receivable, Net	6,799	11,556
Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	213	549
Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	107,382	109,080
Past Due Loans	189	0
Nonaccrual Loans	213	549
Loans Receivable, Net	107,784	109,629
Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	106,227	103,779
Past Due Loans	0	0
Nonaccrual Loans	0	0
Loans Receivable, Net	106,227	103,779
Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	64,365	103,480
Past Due Loans	0	0
Nonaccrual Loans	0	0
Loans Receivable, Net	64,365	103,480
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	3,799	3,883
Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	308,902	318,369
Past Due Loans	1,534	2,270
Nonaccrual Loans	3,799	3,883
Loans Receivable, Net	314,235	324,522
Financing Receivables, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	1,021	1,157
Financing Receivables, 60 to 89 Days Past Due [Member] | Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	204	10
Financing Receivables, 60 to 89 Days Past Due [Member] | Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	5	301
Financing Receivables, 60 to 89 Days Past Due [Member] | One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	500
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	140	111
Financing Receivables, 60 to 89 Days Past Due [Member] | Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	45	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	627	235
Financing Receivables, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	9,274	7,772
Financing Receivables, 30 to 59 Days Past Due [Member] | Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	6,417	806
Financing Receivables, 30 to 59 Days Past Due [Member] | Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	34	287
Financing Receivables, 30 to 59 Days Past Due [Member] | One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	1,115	2,448
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	64
Financing Receivables, 30 to 59 Days Past Due [Member] | Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	583	480
Financing Receivables, 30 to 59 Days Past Due [Member] | Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	1,652
Financing Receivables, 30 to 59 Days Past Due [Member] | Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	29	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	189	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	907	2,035
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	$ 0	$ 0

Loans (Analysis of Impaired Loa

Loans (Analysis of Impaired Loans) (Details) - Loans, Excluding Purchased Credit Impaired Loans [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	$ 6,065,903		$ 6,042,304
Recorded Investment of Loans Individually Measured for Specific Impairment	23,329		25,459
Recorded Investment	17,449		17,592
Unpaid Principal Balance	28,046		27,228
Related Allowance	94		761
Average Recorded Investment Impaired Loans	24,394	$ 22,448
Interest Recognized on Impaired Loans	49	36
Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	2,456,672		2,442,772
Recorded Investment of Loans Individually Measured for Specific Impairment	7,788		8,818
Recorded Investment	0		2,414
Unpaid Principal Balance	0		2,484
Related Allowance	0		664
Average Recorded Investment Impaired Loans	8,303	12,103
Interest Recognized on Impaired Loans	19	17
Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	90,473		94,737
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	169,686		167,403
Recorded Investment of Loans Individually Measured for Specific Impairment	513		529
Recorded Investment	424		435
Unpaid Principal Balance	688		693
Related Allowance	11		12
Average Recorded Investment Impaired Loans	521	975
Interest Recognized on Impaired Loans	2	6
Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	280,992		270,106
Recorded Investment of Loans Individually Measured for Specific Impairment	2,299		708
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment Impaired Loans	1,504	0
Interest Recognized on Impaired Loans	0	0
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,366,381		1,365,321
Recorded Investment of Loans Individually Measured for Specific Impairment	3,694		4,425
Recorded Investment	533		540
Unpaid Principal Balance	537		544
Related Allowance	26		27
Average Recorded Investment Impaired Loans	4,059	2,080
Interest Recognized on Impaired Loans	1	3
Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,107,814		1,054,564
Recorded Investment of Loans Individually Measured for Specific Impairment	3,510		5,414
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment Impaired Loans	4,462	5,516
Interest Recognized on Impaired Loans	0	7
Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	6,799		11,542
Recorded Investment of Loans Individually Measured for Specific Impairment	0		14
Recorded Investment	0		14
Unpaid Principal Balance	0		102
Related Allowance	0		1
Average Recorded Investment Impaired Loans	7	388
Interest Recognized on Impaired Loans	0	1
Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	107,784		109,293
Recorded Investment of Loans Individually Measured for Specific Impairment	0		336
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment Impaired Loans	168	562
Interest Recognized on Impaired Loans	0	0
Income Property Multifamily Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	106,227		103,779
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Owner Occupied Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	64,365		103,480
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	308,710		319,307
Recorded Investment of Loans Individually Measured for Specific Impairment	5,525		5,215
Recorded Investment	4,923		4,464
Unpaid Principal Balance	5,013		4,558
Related Allowance	57		57
Average Recorded Investment Impaired Loans	5,370	824
Interest Recognized on Impaired Loans	27	$ 2
Impaired Loans With Recorded Allowance [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	5,880		7,867
Unpaid Principal Balance	6,238		8,381
Impaired Loans Without Recorded Allowance [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	7,788		6,404
Unpaid Principal Balance	14,806		12,831
Impaired Loans Without Recorded Allowance [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	89		94
Unpaid Principal Balance	287		291
Impaired Loans Without Recorded Allowance [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	2,299		708
Unpaid Principal Balance	2,288		687
Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	3,161		3,885
Unpaid Principal Balance	3,656		4,148
Impaired Loans Without Recorded Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	3,510		5,414
Unpaid Principal Balance	6,327		8,102
Impaired Loans Without Recorded Allowance [Member] | Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		336
Unpaid Principal Balance	0		336
Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Owner Occupied Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	602		751
Unpaid Principal Balance	$ 682		$ 833

Loans Loans (Analysis of Troubl

Loans Loans (Analysis of Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)Modifications	Mar. 31, 2016USD ($)Modifications	Dec. 31, 2016USD ($)
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Additional Commitment To Lend	$ 451		$ 508
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	13	8
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,902	$ 2,117
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,902	$ 2,117
Loans, Excluding Purchased Credit Impaired Loans [Member] | Secured Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	3	3
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 356	$ 1,370
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 356	$ 1,370
Loans, Excluding Purchased Credit Impaired Loans [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	0	1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 250
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 250
Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	10	4
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,546	$ 497
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,546	$ 497

Loans Loans (Analysis of Purcha

Loans Loans (Analysis of Purchased Credit Impaired Loans - Accretable Yield Rollforward) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Loans, Analysis of Purchased Credit Impaired Loans, Accretable Yield Rollforward [Abstract]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield	$ 38,444	$ 56,607	$ 45,191	$ 58,981
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	4,182	4,229
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans	158	(94)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	$ (2,407)	$ 1,761

Allowance for Loan and Lease 46

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for loan and lease losses	$ 2,775	$ 5,254

Allowance for Loan and Lease 47

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Allowance for Loan and Lease Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 70,043	$ 68,172
Charged-offs	(3,815)	(6,905)
Recoveries	2,018	2,743
Provision for loan and lease losses	2,775	5,254
Ending balance	71,021	69,264
Specific Reserve	94	2,515
General Allocation	70,927	66,749
Secured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	36,050	32,321
Charged-offs	(1,109)	(3,770)
Recoveries	297	611
Provision for loan and lease losses	434	2,952
Ending balance	35,672	32,114
Specific Reserve	0	2,500
General Allocation	35,672	29,614
Unsecured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	960	1,299
Charged-offs	(18)	(3)
Recoveries	68	51
Provision for loan and lease losses	178	(47)
Ending balance	1,188	1,300
Specific Reserve	0	0
General Allocation	1,188	1,300
One-to-Four Family Residential [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	599	916
Charged-offs	(307)	0
Recoveries	117	41
Provision for loan and lease losses	236	(303)
Ending balance	645	654
Specific Reserve	11	0
General Allocation	634	654
Commercial Land [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,797	1,178
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	491	84
Ending balance	2,288	1,262
Specific Reserve	0	0
General Allocation	2,288	1,262
Income Property Multifamily [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	7,342	6,616
Charged-offs	0	0
Recoveries	35	61
Provision for loan and lease losses	(574)	725
Ending balance	6,803	7,402
Specific Reserve	26	0
General Allocation	6,777	7,402
Owner Occupied [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,439	5,550
Charged-offs	0	0
Recoveries	43	8
Provision for loan and lease losses	52	528
Ending balance	6,534	6,086
Specific Reserve	0	0
General Allocation	6,534	6,086
Land And Acquisition [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	316	339
Charged-offs	(14)	0
Recoveries	20	51
Provision for loan and lease losses	187	250
Ending balance	509	640
Specific Reserve	0	0
General Allocation	509	640
Residential Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	669	733
Charged-offs	0	0
Recoveries	9	203
Provision for loan and lease losses	431	513
Ending balance	1,109	1,449
Specific Reserve	0	0
General Allocation	1,109	1,449
Income Property Multifamily Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	404	388
Charged-offs	0	0
Recoveries	0	1
Provision for loan and lease losses	378	326
Ending balance	782	715
Specific Reserve	0	0
General Allocation	782	715
Owner Occupied Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,192	1,006
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	576	204
Ending balance	1,768	1,210
Specific Reserve	0	0
General Allocation	1,768	1,210
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,534	3,531
Charged-offs	(428)	(266)
Recoveries	285	165
Provision for loan and lease losses	(31)	(62)
Ending balance	3,360	3,368
Specific Reserve	57	15
General Allocation	3,303	3,353
Purchased Credit Impaired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,515	13,726
Charged-offs	(1,939)	(2,866)
Recoveries	1,144	1,551
Provision for loan and lease losses	(325)	653
Ending balance	9,395	13,064
Specific Reserve	0	0
General Allocation	9,395	13,064
Unallocated Financing Receivables [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	226	569
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	742	(569)
Ending balance	968	0
Specific Reserve	0	0
General Allocation	$ 968	$ 0

Allowance for Loan and Lease 48

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Changes in the Allowance for Unfunded Commitments and Letters of Credit) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit
Beginning balance	$ 2,705	$ 2,930
Allowance for Loan and Lease Losses, Net Changes In Unfunded Commitments and Letters Of Credit Allowance	850	0
Ending balance	$ 3,555	$ 2,930

Allowance for Loan and Lease 49

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Analysis of Credit Quality of the Loan Portfolio) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	$ 71,021	$ 70,043	$ 69,264	$ 68,172
Loans, net	6,157,115	6,143,380
Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	6,089,232	6,067,763
Less: allowance for loan and lease losses	61,626	59,528
Loans, net	6,027,606	6,008,235
Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	148,883	157,251
Acquisition Accounting Valuation Discount on Purchased Credit Impaired Loans	9,979	11,591
Less: allowance for loan and lease losses	9,395	10,515
Loans, net	129,509	135,145
Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	5,838,265	5,820,954
Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	143,227	150,523
Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	56,311	94,867
Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	2,121	92
Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	194,656	151,942
Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	3,535	6,636
Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Secured Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	35,672	36,050	32,114	32,321
Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	2,464,460	2,451,590
Secured Loans [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	19,554	20,870
Secured Loans [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	2,297,687	2,289,307
Secured Loans [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	18,443	18,824
Secured Loans [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	40,267	65,846
Secured Loans [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	89	92
Secured Loans [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	126,506	96,437
Secured Loans [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,022	1,954
Secured Loans [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Secured Loans [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Secured Loans [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Secured Loans [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Unsecured Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	1,188	960	1,300	1,299
Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	90,473	94,737
Unsecured Loans [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	738	736
Unsecured Loans [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	89,171	93,721
Unsecured Loans [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	738	736
Unsecured Loans [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	850	800
Unsecured Loans [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Unsecured Loans [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	452	216
Unsecured Loans [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Unsecured Loans [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Unsecured Loans [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Unsecured Loans [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Unsecured Loans [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
One-to-Four Family Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	645	599	654	916
One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	170,199	167,932
One-to-Four Family Residential [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	17,608	20,643
One-to-Four Family Residential [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	169,158	164,797
One-to-Four Family Residential [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	16,571	19,293
One-to-Four Family Residential [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	395
One-to-Four Family Residential [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
One-to-Four Family Residential [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,041	2,740
One-to-Four Family Residential [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,037	1,350
One-to-Four Family Residential [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
One-to-Four Family Residential [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
One-to-Four Family Residential [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
One-to-Four Family Residential [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Commercial Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	2,288	1,797	1,262	1,178
Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	283,291	270,814
Commercial Land [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	10,735	7,546
Commercial Land [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	270,840	263,195
Commercial Land [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	8,703	7,333
Commercial Land [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	5,199	3,228
Commercial Land [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	2,032	0
Commercial Land [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	7,252	4,391
Commercial Land [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	213
Commercial Land [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Commercial Land [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Commercial Land [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Commercial Land [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	6,803	7,342	7,402	6,616
Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,370,075	1,369,746
Income Property Multifamily [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	27,995	32,720
Income Property Multifamily [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,345,290	1,341,978
Income Property Multifamily [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	27,857	31,042
Income Property Multifamily [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	6,321	17,902
Income Property Multifamily [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	18,464	9,866
Income Property Multifamily [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	138	1,678
Income Property Multifamily [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	6,534	6,439	6,086	5,550
Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,111,324	1,059,978
Owner Occupied [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	54,200	54,529
Owner Occupied [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,077,648	1,027,019
Owner Occupied [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	53,380	53,623
Owner Occupied [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	3,673	6,608
Owner Occupied [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Owner Occupied [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	30,003	26,351
Owner Occupied [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	820	906
Owner Occupied [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Owner Occupied [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Owner Occupied [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Owner Occupied [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Land And Acquisition [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	509	316	640	339
Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	6,799	11,556
Land And Acquisition [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	479	832
Land And Acquisition [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	6,799	11,541
Land And Acquisition [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	401	744
Land And Acquisition [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Land And Acquisition [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Land And Acquisition [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	15
Land And Acquisition [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	78	88
Land And Acquisition [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Land And Acquisition [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Land And Acquisition [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Land And Acquisition [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	1,109	669	1,449	733
Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	107,784	109,629
Residential Construction [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	107,571	108,941
Residential Construction [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	213	688
Residential Construction [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	782	404	715	388
Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	106,227	103,779
Income Property Multifamily Construction [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	799	1,217
Income Property Multifamily Construction [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	106,227	103,779
Income Property Multifamily Construction [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	799	1,217
Income Property Multifamily Construction [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily Construction [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily Construction [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily Construction [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily Construction [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily Construction [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Owner Occupied Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	1,768	1,192	1,210	1,006
Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	64,365	103,480
Owner Occupied Construction [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	290	509
Owner Occupied Construction [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	60,315	98,948
Owner Occupied Construction [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	290	509
Owner Occupied Construction [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	88
Owner Occupied Construction [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Owner Occupied Construction [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	4,050	4,444
Owner Occupied Construction [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Owner Occupied Construction [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Owner Occupied Construction [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Owner Occupied Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Owner Occupied Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	3,360	3,534	$ 3,368	$ 3,531
Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	314,235	324,522
Consumer Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	16,485	17,649
Consumer Portfolio Segment [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	307,559	317,728
Consumer Portfolio Segment [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	16,045	17,202
Consumer Portfolio Segment [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1	0
Consumer Portfolio Segment [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Consumer Portfolio Segment [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	6,675	6,794
Consumer Portfolio Segment [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	440	447
Consumer Portfolio Segment [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Consumer Portfolio Segment [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	$ 0	$ 0

Other Real Estate Owned (Summar

Other Real Estate Owned (Summary of Other Real Estate Owned) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other Real Estate Owned [Line Items]
Balance, beginning of period	$ 5,998	$ 13,738
Transfers in	0	105
Valuation adjustments	(193)	(137)
Proceeds from Sale of OREO Property	1,275	1,326
Gain (loss) on sale of OREO, net	(11)	47
Total OREO, end of period	4,519	$ 12,427
Mortgage Loans in Process of Foreclosure, Amount	675
One-to-Four Family Residential [Member]
Other Real Estate Owned [Line Items]
Total OREO, end of period	$ 379

Covered Assets and FDIC Loss-51

Covered Assets and FDIC Loss-sharing Asset (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Amount of Estimated Clawback Liability	$ 5,380
Payment Of Clawback If Losses Less Than Stated Levels, Period After Acquisition	10 years 45 days
Federal deposit insurance corporation loss-sharing indemnified assets	$ 2,500
Federal deposit insurance corporation loss-sharing indemnified assets receivable	$ 773
Maximum [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Loss Sharing Agreement Effective Years	10 years
Loss Recovery Provision Effective Years	10 years
Minimum [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Loss Sharing Agreement Effective Years	5 years
Loss Recovery Provision Effective Years	8 years
Covered Loans [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Percentage of loss shared by FDIC	80.00%
FDIC Percentage Of Loss Recoveries	80.00%
Percentage of loss shared by FDIC When Loss Share Thresholds Met	95.00%
Percentage Of Loss Recoveries Shared By FDIC When Loss Share Thresholds Met	95.00%

Covered Assets and FDIC Loss-52

Covered Assets and FDIC Loss-sharing Asset (FDIC Loss-sharing Asset) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at beginning of period	$ 3,535	$ 6,568
Cash paid to the FDIC, net	184	353
FDIC reimbursable losses, net	(206)	136
Amortization, net	(315)	(1,332)
Loan impairment	40	147
Sale of other real estate	7	144
Valuation adjustments of other real estate owned	0	18
Other	6	80
Balance at end of period	3,239	$ 5,954
Amount of Estimated Clawback Liability	5,380
Non-Single Family Covered Assets	73,991
Single Family Covered Assets	26,445
Columbia River Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	158
Amount of Estimated Clawback Liability	3,362
Non-Single Family Covered Assets	50,590
Single Family Covered Assets	5,721
American Marine Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	1,676
Amount of Estimated Clawback Liability	1,275
Non-Single Family Covered Assets	8,885
Single Family Covered Assets	15,319
Summit Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	1,313
Amount of Estimated Clawback Liability	0
Non-Single Family Covered Assets	4,788
Single Family Covered Assets	4,182
First Heritage Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	92
Amount of Estimated Clawback Liability	743
Non-Single Family Covered Assets	9,728
Single Family Covered Assets	$ 1,223

Goodwill and Intangible Asset53

Goodwill and Intangible Assets (Schedule of Goodwill and Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets [Roll Forward]
Total goodwill, beginning of period	$ 382,762
Total goodwill, end of period	382,762	$ 382,762
CDI current period amortization	(1,349)	(1,583)
Indefinite-Lived Intangible Assets (Excluding Goodwill)	919	919
Other intangible assets, net	16,282	21,994	$ 17,631
Total goodwill and intangible assets, end of period	$ 399,044	404,756
Core Deposits [Member]
Goodwill and Intangible Assets [Line Items]
Estimated life of CDI, in years	10 years
Goodwill and Intangible Assets [Roll Forward]
Gross core deposit intangible balance, beginning of period			58,598	$ 58,598
Accumulated amortization at beginning of period			$ (41,886)	$ (35,940)
Core deposit intangible, net, beginning of period	$ 16,712	22,658
CDI current period amortization	(1,349)	(1,583)
Total core deposit intangible, end of period	$ 15,363	$ 21,075

Goodwill and Intangible Asset54

Goodwill and Intangible Assets (Estimated Future Amortization Expense of Core Deposit Intangibles) (Details) $ in Thousands	Mar. 31, 2017USD ($)
Future Amortization Expense For Core Deposit Intangibles
2,016	$ 3,564
2,017	3,855
2,018	2,951
2,019	2,048
2,020	$ 1,440

Derivatives and Balance Sheet55

Derivatives and Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Derivative [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ 4	$ (8)
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	46,914
Secured Borrowings, Gross, Difference, Amount	0
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	46,914
Maturity Overnight [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	21,914
Maturity Less than 30 Days [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	0
Maturity 30 to 90 Days [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	0
Maturity Greater than 90 Days [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	25,000
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	336,100		$ 309,300
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of asset derivative instruments	8,598		9,012
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of liability derivative instruments	$ 8,618		$ 9,036

Derivatives and Balance Sheet56

Derivatives and Balance Sheet Offsetting Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Balance Sheet Offsetting [Line Items]
Repurchase agreements, amounts offset in balance sheet	$ 0	$ 0
Repurchase agreements, net amount presented in statement of financial position	46,914	80,822
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	(46,914)	(80,822)
Securities sold under agreements to repurchase, amount not offset	0	0
Interest Rate Contracts [Member]
Balance Sheet Offsetting [Line Items]
Derivative Assets, Gross Amounts Offset in the Balance Sheets	0	0
Derivative Asset	8,598	9,012
Derivative, Collateral, Obligation to Return Securities	0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	8,598	9,012
Derivative Liability, Gross Amounts Offset in Balance Sheets	0	0
Derivative Liability	8,618	9,036
Derivative, Collateral, Right to Reclaim Securities	(8,618)	(9,036)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0	0
Available-for-sale Securities [Member]
Balance Sheet Offsetting [Line Items]
Securities Sold under Agreements to Repurchase, Gross	46,914	80,822
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member] | Other Assets [Member]
Balance Sheet Offsetting [Line Items]
Fair value of asset derivative instruments	8,598	9,012
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member] | Other Liabilities [Member]
Balance Sheet Offsetting [Line Items]
Fair value of liability derivative instruments	$ 8,618	$ 9,036

Commitments and Contingent Li57

Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Aug. 24, 2016
Other Commitments [Line Items]
Sale Leaseback Transaction, Monthly Rental Payments	$ 12
Sale Leaseback Transaction, Deferred Gain, Gross			$ 742
Sale Leaseback Transaction, Deferred Gain, Net	696
Commitments to Extend Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	2,230,000	$ 2,170,000
Standby Letters of Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	47,600	49,700
Commercial Letter of Credit and other off-balance sheet liabilities [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 3,000	$ 3,400

Shareholders' Equity (Details)

Shareholders' Equity (Details) - $ / shares	Apr. 27, 2017	Jan. 26, 2017
Subsequent Event [Line Items]
Declared quarterly cash dividend		$ 0.22
Subsequent Event [Member]
Subsequent Event [Line Items]
Declared quarterly cash dividend	$ 0.22

Accumulated Other Comprehensi59

Accumulated Other Comprehensive Income (Changes in AOCI by Component) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	[1]	$ (18,999)	$ (6,295)
Other comprehensive income before reclassifications	[1]	6,306	18,770
Amounts reclassified from accumulated other comprehensive income	[1]	87	(132)
Net current-period other comprehensive income	[1]	6,393	18,638
Ending balance	[1]	(12,606)	12,343
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	[1]	(12,704)	386
Other comprehensive income before reclassifications	[1]	1,702	18,770
Amounts reclassified from accumulated other comprehensive income	[1]	0	(238)
Net current-period other comprehensive income	[1]	1,702	18,532
Ending balance	[1]	(11,002)	18,918
Unrealized Gains and Losses on Pension Plan Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	[1]	(6,295)	(6,681)
Other comprehensive income before reclassifications	[1]	4,604	0
Amounts reclassified from accumulated other comprehensive income	[1]	87	106
Net current-period other comprehensive income	[1]	4,691	106
Ending balance	[1]	$ (1,604)	$ (6,575)
[1]	All amounts are net of tax. Amounts in parenthesis indicate debits.

Accumulated Other Comprehensi60

Accumulated Other Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains, net	$ 0	$ 373
Compensation and employee benefits	40,825	36,319
Total before tax	39,773	30,488
Income tax provision	(10,574)	(9,229)
Net income	29,199	21,259
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains, net	0	373
Total before tax	0	373
Income tax provision	0	(135)
Net income	0	238
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains and Losses on Pension Plan Liability [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Compensation and employee benefits	(136)	(167)
Total before tax	(136)	(167)
Income tax provision	49	61
Net income	$ (87)	$ (106)

Fair Value Accounting and Mea61

Fair Value Accounting and Measurement (Financial Assets And Liabilities Accounted for Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 2,331,359	$ 2,278,577
Fair Value, Level 2 to level 1 Transfers, Amount	0
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 2,331,359	2,278,577
Other assets (Interest rate contracts)	8,598	9,012
Other liabilities (Interest rate contracts)	8,618	9,036
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	252	800
Other assets (Interest rate contracts)	0	0
Other liabilities (Interest rate contracts)	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	2,331,107	2,277,777
Other assets (Interest rate contracts)	8,598	9,012
Other liabilities (Interest rate contracts)	8,618	9,036
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Other assets (Interest rate contracts)	0	0
Other liabilities (Interest rate contracts)	0	0
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,486,498	1,465,732
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,486,498	1,465,732
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
State and Municipal Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	487,355	475,060
State and Municipal Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
State and Municipal Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	487,355	475,060
State and Municipal Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
U.S. Government Agency [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	352,183	331,902
U.S. Government Agency [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
U.S. Government Agency [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	352,183	331,902
U.S. Government Agency [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
US Government Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	252	800
US Government Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	252	800
US Government Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
US Government Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Other Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	5,071	5,083
Other Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Other Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	5,071	5,083
Other Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 0	$ 0

Fair Value Accounting and Mea62

Fair Value Accounting and Measurement (Financial Assets Accounted For Fair Value On Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		$ 10,681
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 193	2,813
OREO	1,260	2,553
Assets, Fair Value Disclosure	1,260	13,234
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		0
OREO	0	0
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		0
OREO	0	0
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		10,681
OREO	1,260	2,553
Assets, Fair Value Disclosure	1,260	13,234
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		2,676
Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 193	$ 137

Fair Value Accounting and Mea63

Fair Value Accounting and Measurement (Quantitative Information About Level 3 Fair Value Measurements) (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2017
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans		$ 10,681
OREO		2,553	$ 1,260
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans		10,681
OREO		$ 2,553	$ 1,260
Market Approach Valuation Technique [Member] | Impaired Loans [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	[1]	0.00%
Market Approach Valuation Technique [Member] | Impaired Loans [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	[1]	7.00%
Market Approach Valuation Technique [Member] | Impaired Loans [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	[1]	6.00%
[1]	Discount applied to appraisal value, letter of intent to purchase, or stated value (in the case of accounts receivable, inventory and equipment).

Fair Value Accounting and Mea64

Fair Value Accounting and Measurement (Carrying Amounts and Estimated Fair Values of Selected Financial Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets
Interest-earning deposits with banks	$ 13,124	$ 31,200
Securities available for sale	2,331,359	2,278,577
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Assets
Cash and due from banks	169,697	193,038
Interest-earning deposits with banks	13,124	31,200
Securities available for sale	2,331,359	2,278,577
FHLB stock	10,600	10,240
Loans held for sale	3,245	5,846
Loans	6,157,115	6,143,380
FDIC loss-sharing asset	3,239	3,535
Interest rate contracts	8,598	9,012
Liabilities
Deposits	8,088,827	8,059,415
FHLB Advances	15,483	6,493
Repurchase agreements	46,914	80,822
Interest rate contracts	8,618	9,036
Estimate of Fair Value, Fair Value Disclosure [Member]
Assets
Cash and due from banks	169,697	193,038
Interest-earning deposits with banks	13,124	31,200
Securities available for sale	2,331,359	2,278,577
FHLB stock	10,600	10,240
Loans held for sale	3,245	5,846
Loans	6,042,895	6,040,439
FDIC loss-sharing asset	921	867
Interest rate contracts	8,598	9,012
Liabilities
Deposits	8,084,550	8,055,168
FHLB Advances	16,110	7,070
Repurchase agreements	47,099	81,131
Interest rate contracts	8,618	9,036
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets
Cash and due from banks	169,697	193,038
Interest-earning deposits with banks	13,124	31,200
Securities available for sale	252	800
FHLB stock	0	0
Loans held for sale	0	0
Loans	0	0
FDIC loss-sharing asset	0	0
Interest rate contracts	0	0
Liabilities
Deposits	7,699,879	7,653,122
FHLB Advances	0	0
Repurchase agreements	0	0
Interest rate contracts	0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets
Cash and due from banks	0	0
Interest-earning deposits with banks	0	0
Securities available for sale	2,331,107	2,277,777
FHLB stock	10,600	10,240
Loans held for sale	3,245	5,846
Loans	0	0
FDIC loss-sharing asset	0	0
Interest rate contracts	8,598	9,012
Liabilities
Deposits	384,671	402,046
FHLB Advances	16,110	7,070
Repurchase agreements	47,099	81,131
Interest rate contracts	8,618	9,036
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets
Cash and due from banks	0	0
Interest-earning deposits with banks	0	0
Securities available for sale	0	0
FHLB stock	0	0
Loans held for sale	0	0
Loans	6,042,895	6,040,439
FDIC loss-sharing asset	921	867
Interest rate contracts	0	0
Liabilities
Deposits	0	0
FHLB Advances	0	0
Repurchase agreements	0	0
Interest rate contracts	$ 0	$ 0

Earnings per Common Share (Deta

Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 29,199	$ 21,259
Earnings allocated to participating securities - preferred shares	3	39
Earnings allocated to participating securities - nonvested restricted shares	397	247
Earnings allocated to common shareholders, Basic	$ 28,799	$ 20,973
Weighted average common shares outstanding	57,388	57,114
Basic earnings per common share	$ 0.50	$ 0.37
Earnings allocated to common shareholders, Diluted	$ 28,799	$ 20,973
Dilutive effect of equity awards and warrants	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