Columbia Banking System (COLB) 10-Q 9 Aug 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Jul. 31, 2017
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
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		58,380,971

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) shares in Thousands, $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
ASSETS
Cash and due from banks		$ 197,623	$ 193,038
Interest-earning deposits with banks		14,425	31,200
Total cash and cash equivalents		212,048	224,238
Securities available for sale at fair value (amortized cost of $2,272,959 and $2,299,037, respectively)		2,264,636	2,278,577
Federal Home Loan Bank stock at cost		16,360	10,240
Loans held for sale		6,918	5,846
Loans, net of unearned income of ($30,665) and ($33,718), respectively		6,423,074	6,213,423
Less: allowance for loan and lease losses		72,984	70,043
Loans, net		6,350,090	6,143,380
FDIC loss-sharing asset		0	3,535
Interest receivable		30,856	30,074
Premises and equipment, net		146,728	150,342
Other real estate owned		4,058	5,998
Goodwill		382,762	382,762
Other intangible assets, net		15,033	17,631
Other assets		255,621	256,984
Total assets		9,685,110	9,509,607
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing		3,905,652	3,944,495
Interest-bearing		4,166,812	4,114,920
Total deposits		8,072,464	8,059,415
Federal Home Loan Bank advances		159,474	6,493
Securities sold under agreements to repurchase		65,895	80,822
Other liabilities		89,963	111,865
Total liabilities		8,387,796	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		58,353	58,042
Common Stock (no par value)		$ 1,001,292	$ 995,837
Retained earnings		302,550	271,957
Accumulated other comprehensive loss	[1]	(6,528)	(18,999)
Total shareholders’ equity		1,297,314	1,251,012
Total liabilities and shareholders’ equity		$ 9,685,110	$ 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	Jun. 30, 2017	Dec. 31, 2016
Securities available-for-sale, amortized cost	$ 2,272,959	$ 2,299,037
Less: unearned income on loans	$ (30,665)	$ (33,718)
Common stock, par value	$ 0	$ 0
Authorized shares	115,000	115,000
Common stock, shares outstanding	58,353	58,042

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest Income
Loans	$ 75,579	$ 71,651	$ 149,699	$ 141,967
Taxable securities	9,468	8,829	20,454	16,846
Tax-exempt securities	2,716	2,795	5,407	5,598
Deposits in banks	23	28	42	66
Total interest income	87,786	83,303	175,602	164,477
Interest Expense
Deposits	908	787	1,695	1,529
Federal Home Loan Bank advances	591	241	816	365
Other borrowings	126	135	255	273
Total interest expense	1,625	1,163	2,766	2,167
Net Interest Income	86,161	82,140	172,836	162,310
Provision for loan and lease losses	3,177	3,640	5,952	8,894
Net interest income after provision for loan and lease losses	82,984	78,500	166,884	153,416
Noninterest Income
Deposit account and treasury management fees	7,396	7,093	14,683	14,082
Card revenue	6,202	6,051	11,925	11,703
Financial services and trust revenue	3,036	2,780	5,875	5,601
Loan revenue	2,989	2,802	6,582	5,064
Merchant processing revenue	2,264	2,272	4,283	4,374
Bank owned life insurance	1,433	1,270	2,713	2,386
Investment securities gains	0	229	0	602
Change in FDIC loss-sharing asset	(173)	(990)	(447)	(2,093)
Other	988	433	3,380	867
Total noninterest income	24,135	21,940	48,994	42,586
Noninterest Expense
Compensation and employee benefits	38,393	37,291	79,218	73,610
Occupancy	7,577	7,652	14,768	17,825
Merchant processing expense	1,147	1,118	2,196	2,151
Advertising and promotion	1,137	1,043	1,954	1,885
Data processing	4,741	3,929	8,949	8,075
Legal and professional fees	2,947	1,777	6,316	3,102
Taxes, licenses and fees	748	1,298	1,989	2,588
Regulatory premiums	741	1,068	1,517	2,209
Net cost (benefit) of operation of other real estate owned	(1)	84	151	188
Amortization of intangibles	1,249	1,483	2,598	3,066
Other	10,188	7,047	18,197	14,165
Total noninterest expense	68,867	63,790	137,853	128,864
Income before income taxes	38,252	36,650	78,025	67,138
Income tax provision	11,120	11,245	21,694	20,474
Net Income	$ 27,132	$ 25,405	$ 56,331	$ 46,664
Earnings per common share
Basic ($ per share)	$ 0.47	$ 0.44	$ 0.97	$ 0.80
Diluted ($ per share)	0.47	0.44	0.97	0.80
Dividends paid per common share	$ 0.22	$ 0.37	$ 0.44	$ 0.75
Weighted average number of common shares outstanding	57,520	57,185	57,437	57,149
Weighted average number of diluted common shares outstanding	57,525	57,195	57,442	57,160

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net income		$ 27,132	$ 25,405	$ 56,331	$ 46,664
Unrealized gain from securities:
Net unrealized holding loss from available for sale securities arising during the period		6,033	8,508	7,735	27,278
Reclassification adjustment of net gain from sale of available for sale securities included in income		0	(146)	0	(384)
Net unrealized gain from securities, net of reclassification adjustment		6,033	8,362	7,735	26,894
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		45	106	132	212
Pension plan liability adjustment, net		45	106	4,736	212
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	[1]	6,078	8,468	12,471	27,106
Total comprehensive income		$ 33,210	$ 33,873	$ 68,802	$ 73,770
[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		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax	$ (3,435)	$ (4,844)	$ (4,404)	$ (15,530)
Reclassification adjustment of net gain from sale of available for sale securities included in income, tax	0	83	0	218
Net unrealized loss from unfunded defined benefit plan liability arising during the period, tax	0	0	(2,622)	0
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax	$ (26)	$ (61)	$ (75)	$ (122)

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	46,664		46,664
Other comprehensive income	27,106			27,106
Issuance of common stock - stock option and other plans, value	603	$ 603
Issuance of common stock - stock option and other plans, shares		21,000
Issuance of common stock - restricted stock awards, net of cancelled awards, value	2,551	$ 2,551
Issuance of common stock - restricted stock awards, net of cancelled awards, shares		317,000
Stock Repurchased and Retired During Period, Value	(1,092)	$ (1,092)
Stock Repurchased During Period, Shares		(37,000)
Dividends, Preferred Stock, Cash	(77)		(77)
Cash dividends paid on common stock	(43,404)		(43,404)
Balance, value at Jun. 30, 2016	1,274,479	$ 992,343	259,108	20,811	$ 2,217
Balance, shares at Jun. 30, 2016		58,025,000			9,000
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-09 [Member]	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	56,331		56,331
Other comprehensive income	12,471			12,471
Issuance of common stock - stock option and other plans, value	1,155	$ 1,155
Issuance of common stock - stock option and other plans, shares		28,000
Issuance of common stock - restricted stock awards, net of cancelled awards, value	4,114	$ 4,114
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		235,000
Stock Repurchased and Retired During Period, Value	(2,215)	$ (2,215)
Stock Repurchased During Period, Shares		(54,000)
Cash dividends paid on common stock	(25,621)		(25,621)
Balance, value at Jun. 30, 2017	$ 1,297,314	$ 1,001,292	$ 302,550	$ (6,528)	$ 0
Balance, shares at Jun. 30, 2017		58,353,000			0

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
FDIC loss-sharing agreement early termination, pretax loss	$ 2,409	$ 0
Cash Flows From Operating Activities
Net income	56,331	46,664
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan and lease losses	5,952	8,894
Stock-based compensation expense	4,114	2,551
Depreciation, amortization and accretion	13,968	18,898
Investment securities gains	0	602
Net realized (gain) loss on sale of premises and equipment, loans held for investment and other assets	(176)	170
Net realized loss on sale and valuation adjustments of other real estate owned	(221)	(160)
Originations of loans held for sale	65,902	46,705
Proceeds from sales of loans held for sale	64,830	43,565
Net change in:
Interest receivable	(782)	(1,861)
Interest payable	35	(74)
Other assets	(5,987)	(7,818)
Other liabilities	(9,230)	9,809
Net cash provided by operating activities	65,783	73,651
Cash Flows From Investing Activities
Loans originated and acquired, net of principal collected	(216,541)	(298,259)
Purchases of securities available for sale	(114,309)	(296,920)
Purchases of premises and equipment	(1,947)	(1,199)
Payments to Acquire Federal Home Loan Bank Stock	(86,840)	(42,400)
Proceeds from FDIC for reimbursement on loss-sharing asset	26	668
Proceeds from sales of securities available for sale	0	83,410
Proceeds from principal repayments and maturities of securities available for sale	131,472	123,817
Proceeds from Sales of Assets, Investing Activities	8,133	4,631
Proceeds from Sale of Federal Home Loan Bank Stock	80,720	36,961
Proceeds from sales of other real estate and other personal property owned	1,719	3,276
Payment to FDIC to terminate loss-sharing agreements	(4,666)	0
Payments to FDIC related to loss-sharing asset	(210)	(625)
Net cash used in investing activities	(202,443)	(386,640)
Cash Flows From Financing Activities
Net increase in deposits	13,078	234,526
Net decrease in sweep repurchase agreements	(14,927)	(10,481)
Proceeds from Federal Home Loan Bank advances	2,171,000	962,000
Federal Reserve Bank borrowings	10	10
Proceeds from exercise of stock options	1,155	603
Repayment of Federal Home Loan Bank advances	(2,018,000)	(826,000)
Repayment of Federal Reserve Bank borrowings	10	10
Payment of common stock dividends	(25,621)	(43,404)
Preferred stock dividends	0	(77)
Purchase and retirement of common stock	2,215	1,092
Net cash provided by financing activities	124,470	316,075
Increase (decrease) in cash and cash equivalents	(12,190)	3,086
Cash and cash equivalents at beginning of period	224,238	175,302
Cash and cash equivalents at end of period	212,048	178,388
Supplemental Information:
Cash paid for interest	2,731	2,241
Cash paid for income tax	22,881	11,130
Non-cash investing and financing activities
Loans transferred to other real estate owned	$ 0	$ 311

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	6 Months Ended
	Jun. 30, 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 six months ended June 30, 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	6 Months Ended
	Jun. 30, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Accounting Pronouncements Recently Issued	Accounting Pronouncements Recently Issued In May 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-09, Scope of Modification Accounting . The amendments in this ASU provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. The amendments in ASU 2017-09 are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted. The adoption of ASU 2017-09 is not expected to have a material impact on the Company’s consolidated financial statements. In March 2017, the FASB issued 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 first quarter of 2017. The impact of the adoption of ASU 2017-08 to 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 adoption of ASU 2017-04 is not expected to have a material impact on the Company’s consolidated financial statements. 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 during the first quarter of 2017. Adoption of amended forfeiture guidance resulted in an opening period adjustment decreasing retained earnings $117 thousand and increasing common stock $184 thousand . Adoption of the amended excess tax benefit guidance resulted in an income tax benefit of $100 thousand for the three months ended June 30, 2017 and an income tax benefit of $1.3 million or $0.02 per diluted common share for the six months ended June 30, 2017 . 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. Significant implementation matters to be addressed by the Company include selecting a third-party lease accounting 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. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers . The guidance in this update will replace most existing revenue recognition guidance in GAAP when it becomes effective. For public companies, this update was to be effective for interim and annual periods beginning after December 15, 2016. However, in August 2015, the FASB issued ASU 2015-14, which delayed the effective date of ASU 2014-09 by one year and permits companies to voluntarily adopt the new standard as of the original effective date. The FASB subsequently issued ASU 2016-08, ASU 2016-10 and ASU 2016-12 to provide implementation guidance and practical expedients related to ASU 2014-09. The Company’s revenue is comprised of interest income on financial assets, which is excluded from the scope of this new guidance, and non-interest income. The adoption of ASU 2017-04 is not expected to have a material impact on the Company’s consolidated financial statements.

Securities

Securities	6 Months Ended
	Jun. 30, 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) June 30, 2017 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 1,438,875 $ 3,478 $ (18,395 ) $ 1,423,958 State and municipal securities 476,510 9,279 (2,696 ) 483,093 U.S. government agency and government-sponsored enterprise securities 352,039 1,486 (1,287 ) 352,238 U.S. government securities 251 — (1 ) 250 Other securities 5,284 70 (257 ) 5,097 Total $ 2,272,959 $ 14,313 $ (22,636 ) $ 2,264,636 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 The following table provides the proceeds and gross realized gains and losses on the sales of securities for the periods indicated: Three Months Ended Six Months Ended June 30, June 30, 2017 2016 2017 2016 (in thousands) Proceeds from sales of available for sale securities $ — $ 44,534 $ — $ 83,410 Gross realized gains $ — $ 229 $ — $ 602 Gross realized losses — — — — Net realized gains $ — $ 229 $ — $ 602 The scheduled contractual maturities of investment securities available for sale at June 30, 2017 are presented as follows: June 30, 2017 Amortized Cost Fair Value (in thousands) Due within one year $ 99,775 $ 99,740 Due after one year through five years 461,043 464,716 Due after five years through ten years 726,133 724,520 Due after ten years 980,724 970,563 Other securities with no stated maturity 5,284 5,097 Total investment securities available-for-sale $ 2,272,959 $ 2,264,636 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: June 30, 2017 (in thousands) Washington and Oregon State to secure public deposits $ 244,580 Federal Reserve Bank to secure borrowings 54,877 Other securities pledged 122,932 Total securities pledged as collateral $ 422,389 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 June 30, 2017 and December 31, 2016 : Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized (in thousands) June 30, 2017 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 858,558 $ (12,683 ) $ 180,212 $ (5,712 ) $ 1,038,770 $ (18,395 ) State and municipal securities 108,038 (2,189 ) 13,246 (507 ) 121,284 (2,696 ) U.S. government agency and government-sponsored enterprise securities 194,738 (1,287 ) — — 194,738 (1,287 ) U.S. government securities 251 (1 ) — — 251 (1 ) Other securities 2,276 (39 ) 2,737 (218 ) 5,013 (257 ) Total $ 1,163,861 $ (16,199 ) $ 196,195 $ (6,437 ) $ 1,360,056 $ (22,636 ) 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 June 30, 2017 , there were 172 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations securities in an unrealized loss position, of which 54 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 June 30, 2017 . At June 30, 2017 , there were 99 state and municipal government securities in an unrealized loss position, of which 11 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 June 30, 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 June 30, 2017 . At June 30, 2017 , there were 22 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 June 30, 2017 . At June 30, 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 June 30, 2017 . At June 30, 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 June 30, 2017 as it has the intent and ability to hold these investments for sufficient time to allow for recovery in the market value.

Loans

Loans	6 Months Ended
	Jun. 30, 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): June 30, 2017 December 31, 2016 Loans, excluding PCI loans PCI Loans Total Loans, excluding PCI loans PCI Loans Total (in thousands) Commercial business $ 2,704,468 $ 15,299 $ 2,719,767 $ 2,551,054 $ 20,185 $ 2,571,239 Real estate: One-to-four family residential 173,150 14,735 187,885 170,331 17,862 188,193 Commercial and multifamily residential 2,787,560 84,385 2,871,945 2,719,830 89,231 2,809,061 Total real estate 2,960,710 99,120 3,059,830 2,890,161 107,093 2,997,254 Real estate construction: One-to-four family residential 139,956 453 140,409 121,887 832 122,719 Commercial and multifamily residential 195,565 961 196,526 209,118 1,565 210,683 Total real estate construction 335,521 1,414 336,935 331,005 2,397 333,402 Consumer 323,187 14,020 337,207 329,261 15,985 345,246 Less: Net unearned income (30,665 ) — (30,665 ) (33,718 ) — (33,718 ) Total loans, net of unearned income 6,293,221 129,853 6,423,074 6,067,763 145,660 6,213,423 Less: Allowance for loan and lease losses (64,923 ) (8,061 ) (72,984 ) (59,528 ) (10,515 ) (70,043 ) Total loans, net $ 6,228,298 $ 121,792 $ 6,350,090 $ 6,008,235 $ 135,145 $ 6,143,380 Loans held for sale $ 6,918 $ — $ 6,918 $ 5,846 $ — $ 5,846 At June 30, 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 both June 30, 2017 and December 31, 2016 . During the first six months of 2017 , there were $203 thousand in advances and $200 thousand in repayments. At June 30, 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 $70.1 million and $54.2 million of commercial loans to the Federal Reserve Bank for additional borrowing capacity at June 30, 2017 and December 31, 2016 , respectively. The following is an analysis of nonaccrual loans as of June 30, 2017 and December 31, 2016 : June 30, 2017 December 31, 2016 Recorded Unpaid Principal Recorded Unpaid Principal (in thousands) Commercial business: Secured $ 24,663 $ 38,586 $ 11,524 $ 21,503 Unsecured 84 237 31 303 Real estate: One-to-four family residential 697 1,248 568 1,302 Commercial & multifamily residential: Commercial land 3,198 3,503 934 922 Income property 3,411 3,741 4,005 4,247 Owner occupied 658 2,137 6,248 9,030 Real estate construction: One-to-four family residential: Land and acquisition 27 27 14 102 Residential construction 214 214 549 549 Consumer 3,872 4,543 3,883 4,331 Total $ 36,824 $ 54,236 $ 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 June 30, 2017 and December 31, 2016 : Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans June 30, 2017 (in thousands) Commercial business: Secured $ 2,572,664 $ 5,227 $ 1,810 $ — $ 7,037 $ 24,663 $ 2,604,364 Unsecured 95,132 180 23 — 203 84 95,419 Real estate: One-to-four family residential 169,244 965 148 — 1,113 697 171,054 Commercial & multifamily residential: Commercial land 280,322 — — — — 3,198 283,520 Income property 1,351,539 561 256 — 817 3,411 1,355,767 Owner occupied 1,126,857 2,309 943 — 3,252 658 1,130,767 Real estate construction: One-to-four family residential: Land and acquisition 6,022 — — — — 27 6,049 Residential construction 132,953 — — — — 214 133,167 Commercial & multifamily residential: Income property 153,529 — — — — — 153,529 Owner occupied 35,416 4,050 — — 4,050 — 39,466 Consumer 314,196 1,748 303 — 2,051 3,872 320,119 Total $ 6,237,874 $ 15,040 $ 3,483 $ — $ 18,523 $ 36,824 $ 6,293,221 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 June 30, 2017 and December 31, 2016 : Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid June 30, 2017 (in thousands) Commercial business: Secured $ 2,580,972 $ 23,392 $ 10,275 $ 10,275 $ 3,425 $ 13,117 $ 18,238 Unsecured 95,419 — — — — — — Real estate: One-to-four family residential 170,271 783 320 574 4 463 908 Commercial & multifamily residential: Commercial land 280,721 2,799 — — — 2,799 2,787 Income property 1,352,109 3,658 525 530 25 3,133 3,422 Owner occupied 1,127,370 3,397 — — — 3,397 6,297 Real estate construction: One-to-four family residential: Land and acquisition 6,049 — — — — — — Residential construction 133,167 — — — — — — Commercial & multifamily residential: Income property 153,529 — — — — — — Owner occupied 39,466 — — — — — — Consumer 314,476 5,643 4,877 4,920 45 766 905 Total $ 6,253,549 $ 39,672 $ 15,997 $ 16,299 $ 3,499 $ 23,675 $ 32,557 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 and six month periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Average Recorded Interest Recognized Average Recorded Interest Recognized Average Recorded Interest Recognized Average Recorded Interest Recognized (in thousands) Commercial business: Secured $ 15,590 $ 50 $ 12,859 $ 20 $ 13,332 $ 69 $ 10,414 $ 33 Real estate: One-to-four family residential 648 21 676 (3 ) 608 22 879 3 Commercial & multifamily residential: Commercial land 2,549 — 354 — 1,936 — 236 — Income property 3,676 7 1,749 10 3,925 6 1,868 14 Owner occupied 3,453 192 5,102 — 4,107 192 5,420 — Real estate construction: One-to-four family residential: Land and acquisition — — 206 1 5 — 293 3 Residential construction — — 562 — 112 — 562 — Consumer 5,584 31 2,332 20 5,461 57 1,581 21 Total $ 31,500 $ 301 $ 23,840 $ 48 $ 29,486 $ 346 $ 21,253 $ 74 The following is an analysis of loans classified as troubled debt restructurings (“TDR”) during the three and six months ended June 30, 2017 and 2016 : Three months ended June 30, 2017 Three months ended June 30, 2016 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial business: Secured 2 $ 1,422 $ 1,422 2 $ 293 $ 293 Real estate: One-to-four family residential 1 382 382 — — — Commercial and multifamily residential: Owner occupied — — — 1 30 30 Consumer 8 815 815 14 2,214 2,214 Total 11 $ 2,619 $ 2,619 17 $ 2,537 $ 2,537 Six months ended June 30, 2017 Six months ended June 30, 2016 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial business: Secured 5 $ 1,778 $ 1,778 5 $ 1,663 $ 1,663 Real estate: One-to-four family residential 1 382 382 — — — Commercial and multifamily residential: Owner occupied — — — 2 280 280 Consumer 18 2,361 2,361 18 2,711 2,711 Total 24 $ 4,521 $ 4,521 25 $ 4,654 $ 4,654 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 $371 thousand of additional funds on loans classified as TDR as of June 30, 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 or six months ended June 30, 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 June 30, 2017 and December 31, 2016 : June 30, 2017 December 31, 2016 (in thousands) Commercial business $ 16,608 $ 21,606 Real estate: One-to-four family residential 17,242 20,643 Commercial and multifamily residential 88,398 94,795 Total real estate 105,640 115,438 Real estate construction: One-to-four family residential 453 832 Commercial and multifamily residential 1,074 1,726 Total real estate construction 1,527 2,558 Consumer 15,527 17,649 Subtotal of PCI loans 139,302 157,251 Less: Valuation discount resulting from acquisition accounting 9,449 11,591 Allowance for loan losses 8,061 10,515 PCI loans, net of allowance for loan losses $ 121,792 $ 135,145 The following table shows the changes in accretable yield for PCI loans for the three and six months ended June 30, 2017 and 2016 : Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (in thousands) Balance at beginning of period $ 38,444 $ 56,607 $ 45,191 $ 58,981 Accretion (2,882 ) (3,774 ) (7,064 ) (8,003 ) Disposals — 149 (158 ) 1,910 Reclassifications from (to) nonaccretable difference 144 (73 ) (2,263 ) 21 Balance at end of period $ 35,706 $ 52,909 $ 35,706 $ 52,909

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit	6 Months Ended
	Jun. 30, 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 six months ended June 30, 2017 and 2016 . The following tables show a detailed analysis of the allowance for the three and six months ended June 30, 2017 and 2016 : Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General Three months ended June 30, 2017 (in thousands) Commercial business: Secured $ 35,672 $ (3,600 ) $ 2,903 $ 4,564 $ 39,539 $ 3,425 $ 36,114 Unsecured 1,188 — 41 (82 ) 1,147 — 1,147 Real estate: One-to-four family residential 645 (153 ) 223 (87 ) 628 4 624 Commercial & multifamily residential: Commercial land 2,288 — — 68 2,356 — 2,356 Income property 6,803 — 60 (9 ) 6,854 25 6,829 Owner occupied 6,534 — 67 (89 ) 6,512 — 6,512 Real estate construction: One-to-four family residential: Land and acquisition 509 — 27 (175 ) 361 — 361 Residential construction 1,109 — 31 237 1,377 — 1,377 Commercial & multifamily residential: Income property 782 — — 203 985 — 985 Owner occupied 1,768 — — (386 ) 1,382 — 1,382 Consumer 3,360 (465 ) 248 408 3,551 45 3,506 Purchased credit impaired 9,395 (1,800 ) 1,204 (738 ) 8,061 — 8,061 Unallocated 968 — — (737 ) 231 — 231 Total $ 71,021 $ (6,018 ) $ 4,804 $ 3,177 $ 72,984 $ 3,499 $ 69,485 Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General Six months ended June 30, 2017 (in thousands) Commercial business: Secured $ 36,050 $ (4,709 ) $ 3,200 $ 4,998 $ 39,539 $ 3,425 $ 36,114 Unsecured 960 (18 ) 109 96 1,147 — 1,147 Real estate: One-to-four family residential 599 (460 ) 340 149 628 4 624 Commercial & multifamily residential: Commercial land 1,797 — — 559 2,356 — 2,356 Income property 7,342 — 95 (583 ) 6,854 25 6,829 Owner occupied 6,439 — 110 (37 ) 6,512 — 6,512 Real estate construction: One-to-four family residential: Land and acquisition 316 (14 ) 47 12 361 — 361 Residential construction 669 — 40 668 1,377 — 1,377 Commercial & multifamily residential: Income property 404 — — 581 985 — 985 Owner occupied 1,192 — — 190 1,382 — 1,382 Consumer 3,534 (893 ) 533 377 3,551 45 3,506 Purchased credit impaired 10,515 (3,739 ) 2,348 (1,063 ) 8,061 — 8,061 Unallocated 226 — — 5 231 — 231 Total $ 70,043 $ (9,833 ) $ 6,822 $ 5,952 $ 72,984 $ 3,499 $ 69,485 Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General Three months ended June 30, 2016 (in thousands) Commercial business: Secured $ 32,114 $ (2,900 ) $ 728 $ 1,866 $ 31,808 $ 2,486 $ 29,322 Unsecured 1,300 (41 ) 25 (19 ) 1,265 — 1,265 Real estate: One-to-four family residential 654 (35 ) 20 35 674 1 673 Commercial & multifamily residential: Commercial land 1,262 (26 ) 2 184 1,422 — 1,422 Income property 7,402 — 120 524 8,046 100 7,946 Owner occupied 6,086 — 8 242 6,336 — 6,336 Real estate construction: One-to-four family residential: Land and acquisition 640 — 2 (55 ) 587 — 587 Residential construction 1,449 — 3 (76 ) 1,376 — 1,376 Commercial & multifamily residential: Income property 715 — 1 188 904 — 904 Owner occupied 1,210 — — 174 1,384 — 1,384 Consumer 3,368 (334 ) 201 325 3,560 118 3,442 Purchased credit impaired 13,064 (2,898 ) 1,524 91 11,781 — 11,781 Unallocated — — — 161 161 — 161 Total $ 69,264 $ (6,234 ) $ 2,634 $ 3,640 $ 69,304 $ 2,705 $ 66,599 Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General Six months ended June 30, 2016 (in thousands) Commercial business: Secured $ 32,321 $ (6,670 ) $ 1,339 $ 4,818 $ 31,808 $ 2,486 $ 29,322 Unsecured 1,299 (44 ) 76 (66 ) 1,265 — 1,265 Real estate: One-to-four family residential 916 (35 ) 61 (268 ) 674 1 673 Commercial & multifamily residential: Commercial land 1,178 (26 ) 2 268 1,422 — 1,422 Income property 6,616 — 181 1,249 8,046 100 7,946 Owner occupied 5,550 — 16 770 6,336 — 6,336 Real estate construction: One-to-four family residential: Land and acquisition 339 — 53 195 587 — 587 Residential construction 733 — 206 437 1,376 — 1,376 Commercial & multifamily residential: Income property 388 — 2 514 904 — 904 Owner occupied 1,006 — — 378 1,384 — 1,384 Consumer 3,531 (600 ) 366 263 3,560 118 3,442 Purchased credit impaired 13,726 (5,764 ) 3,075 744 11,781 — 11,781 Unallocated 569 — — (408 ) 161 — 161 Total $ 68,172 $ (13,139 ) $ 5,377 $ 8,894 $ 69,304 $ 2,705 $ 66,599 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 Six Months Ended June 30, June 30, 2017 2016 2017 2016 (in thousands) Balance at beginning of period $ 3,555 $ 2,930 $ 2,705 $ 2,930 Net changes in the allowance for unfunded commitments and letters of credit — (150 ) 850 (150 ) Balance at end of period $ 3,555 $ 2,780 $ 3,555 $ 2,780 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 June 30, 2017 and December 31, 2016 : Pass Special Mention Substandard Doubtful Loss Total June 30, 2017 (in thousands) Loans, excluding PCI loans: Commercial business: Secured $ 2,423,195 $ 74,148 $ 107,021 $ — $ — $ 2,604,364 Unsecured 93,716 701 1,002 — — 95,419 Real estate: One-to-four family residential 168,062 1,204 1,788 — — 171,054 Commercial and multifamily residential: Commercial land 274,000 4,761 4,759 — — 283,520 Income property 1,328,708 8,678 18,381 — — 1,355,767 Owner occupied 1,098,775 8,269 23,723 — — 1,130,767 Real estate construction: One-to-four family residential: Land and acquisition 6,022 — 27 — — 6,049 Residential construction 132,555 399 213 — — 133,167 Commercial and multifamily residential: Income property 153,529 — — — — 153,529 Owner occupied 35,416 — 4,050 — — 39,466 Consumer 311,990 2 8,127 — — 320,119 Total $ 6,025,968 $ 98,162 $ 169,091 $ — $ — 6,293,221 Less: Allowance for loan and lease losses 64,923 Loans, excluding PCI loans, net $ 6,228,298 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 June 30, 2017 and December 31, 2016 : Pass Special Mention Substandard Doubtful Loss Total June 30, 2017 (in thousands) PCI loans: Commercial business: Secured $ 14,930 $ 87 $ 819 $ — $ — $ 15,836 Unsecured 703 — 69 — — 772 Real estate: One-to-four family residential 16,379 — 863 — — 17,242 Commercial and multifamily residential: Commercial land 10,411 — — — — 10,411 Income property 26,047 — 138 — — 26,185 Owner occupied 50,999 — 803 — — 51,802 Real estate construction: One-to-four family residential: Land and acquisition 382 — 71 — — 453 Commercial and multifamily residential: Income property 786 — — — — 786 Owner occupied 288 — — — — 288 Consumer 14,998 — 529 — — 15,527 Total $ 135,923 $ 87 $ 3,292 $ — $ — 139,302 Less: Valuation discount resulting from acquisition accounting 9,449 Allowance for loan losses 8,061 PCI loans, net $ 121,792 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 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	6 Months Ended
	Jun. 30, 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 and six months ended June 30, 2017 and 2016 : Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (in thousands) Balance, beginning of period $ 4,519 $ 12,427 $ 5,998 $ 13,738 Transfers in — 206 — 311 Valuation adjustments (33 ) (139 ) (226 ) (276 ) Proceeds from sale of OREO property (444 ) (1,950 ) (1,719 ) (3,276 ) Gain on sale of OREO, net 16 69 5 116 Balance, end of period $ 4,058 $ 10,613 $ 4,058 $ 10,613 At June 30, 2017 , there were no foreclosed residential real estate properties held as OREO and the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process was $537 thousand .

Covered Assets and FDIC Loss-sh

Covered Assets and FDIC Loss-sharing Asset	6 Months Ended
	Jun. 30, 2017
Covered Assets And FDIC Loss Sharing Asset
Covered Assets and FDIC Loss sharing Asset	FDIC Loss-sharing Asset and Covered Assets During the current quarter, we entered into an agreement with the FDIC to terminate all loss-sharing agreements ahead of their contractual maturities. These loss-sharing agreements were entered into in 2010 and 2011 in conjunction with our acquisitions of (1) Columbia River Bank in January 2010, (2) American Marine Bank in January 2010, (3) Summit Bank in May 2011 and (4) First Heritage Bank in May 2011. Under the early termination, all rights and obligations of the Company and the FDIC have been resolved and completed. The Company paid the FDIC $4.7 million as consideration for early termination. The early termination was recorded in the Company’s financial statements by removing the remaining FDIC loss-sharing asset of $3.1 million and the remaining FDIC clawback liability of $5.4 million and recording a one-time, pre-tax charge on termination of $2.4 million , recorded to “Other” noninterest expense. Prior to entering into the termination agreement, the Company had $74.0 million of non-single family covered assets and $26.4 million of single family covered assets at March 31, 2017. As a result of the termination agreement, the Company will benefit from all future recoveries, and be responsible for all future losses and expenses related to the assets previously subject to the loss-sharing agreements. The following table shows a detailed analysis of the FDIC loss-sharing asset for the three and six months ended June 30, 2017 and 2016 : Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (in thousands) Balance at beginning of period $ 3,239 $ 5,954 $ 3,535 $ 6,568 Adjustments not reflected in income: Cash paid to (received from) the FDIC, net — (396 ) 184 (43 ) FDIC reimbursable losses (recoveries), net 57 (302 ) (149 ) (166 ) Termination of FDIC loss-sharing agreements (3,123 ) — (3,123 ) — Adjustments reflected in noninterest income (1): Amortization, net (99 ) (883 ) (414 ) (2,215 ) Loan impairment (recapture) — (20 ) 40 127 Sale of other real estate 11 (24 ) 18 120 Valuation adjustments of other real estate owned — (40 ) — (22 ) Other (85 ) (23 ) (91 ) (103 ) Balance at end of period $ — $ 4,266 $ — $ 4,266 __________ (1) Amounts shown in the table above for adjustments reflected in noninterest income include only those adjustments recorded to the noninterest income line item “Change in FDIC loss-sharing asset” in the Consolidated Statements of Income and do not include the charge related to the termination of the FDIC loss-sharing agreements.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 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 June 30, Six Months Ended June 30, 2017 2016 2017 2016 (in thousands) Goodwill Total goodwill $ 382,762 $ 382,762 $ 382,762 $ 382,762 Other intangible assets, net Core deposit intangible: Gross core deposit intangible balance at beginning of period 58,598 58,598 58,598 58,598 Accumulated amortization at beginning of period (43,235 ) (37,523 ) (41,886 ) (35,940 ) Core deposit intangible, net at beginning of period 15,363 21,075 16,712 22,658 CDI current period amortization (1,249 ) (1,483 ) (2,598 ) (3,066 ) Total core deposit intangible, net at end of period 14,114 19,592 14,114 19,592 Intangible assets not subject to amortization 919 919 919 919 Other intangible assets, net at end of period 15,033 20,511 15,033 20,511 Total goodwill and other intangible assets at end of period $ 397,795 $ 403,273 $ 397,795 $ 403,273 The following table provides the estimated future amortization expense of core deposit intangibles for the remaining six months ending December 31, 2017 and the succeeding four years: Amount (in thousands) Year ending December 31, 2017 $ 2,315 2018 3,855 2019 2,951 2020 2,048 2021 1,440

Derivatives and Balance Sheet O

Derivatives and Balance Sheet Offsetting	6 Months Ended
	Jun. 30, 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 June 30, 2017 and December 31, 2016 was $346.7 million and $309.3 million , respectively. During the three and six months ended June 30, 2017 , mark-to-market gain s of $2 thousand and $6 thousand were recorded to “Other” noninterest expense. During the three and six months ended June 30, 2016 , a mark-to-market gain of $1 thousand and a loss of $7 thousand were recorded to “Other” noninterest expense. The following table presents the fair value of derivatives not designated as hedging instruments at June 30, 2017 and December 31, 2016 : Asset Derivatives Liability Derivatives June 30, 2017 December 31, 2016 June 30, 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 $ 9,077 Other assets $ 9,012 Other liabilities $ 9,096 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 June 30, 2017 (in thousands) Assets Interest rate contracts $ 9,077 $ — $ 9,077 $ — $ 9,077 Liabilities Interest rate contracts $ 9,096 $ — $ 9,096 $ (9,096 ) $ — Repurchase agreements $ 65,895 $ — $ 65,895 $ (65,895 ) $ — 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 June 30, 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 $ 40,895 $ — $ — $ 25,000 $ 65,895 Gross amount of recognized liabilities for repurchase agreements 65,895 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	6 Months Ended
	Jun. 30, 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 June 30, 2017 , the deferred gain was $679 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 June 30, 2017 and December 31, 2016 , the Company’s loan commitments amounted to $2.18 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 $49.6 million and $49.7 million at June 30, 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 June 30, 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	6 Months Ended
	Jun. 30, 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 . 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 . Subsequent to quarter end, on July 27, 2017 , the Company declared a regular quarterly cash dividend of $0.22 per common share payable on August 23, 2017 to shareholders of record at the close of business on August 9, 2017 . 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	6 Months Ended
	Jun. 30, 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 and six month periods ended June 30, 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 June 30, 2017 (in thousands) Beginning balance $ (11,002 ) $ (1,604 ) $ (12,606 ) Other comprehensive income before reclassifications 6,033 — 6,033 Amounts reclassified from accumulated other comprehensive income — 45 45 Net current-period other comprehensive income 6,033 45 6,078 Ending balance $ (4,969 ) $ (1,559 ) $ (6,528 ) Three months ended June 30, 2016 Beginning balance $ 18,918 $ (6,575 ) $ 12,343 Other comprehensive income before reclassifications 8,508 — 8,508 Amounts reclassified from accumulated other comprehensive income (loss) (146 ) 106 (40 ) Net current-period other comprehensive income 8,362 106 8,468 Ending balance $ 27,280 $ (6,469 ) $ 20,811 Six months ended June 30, 2017 Beginning balance $ (12,704 ) $ (6,295 ) $ (18,999 ) Other comprehensive income before reclassifications 7,735 4,604 12,339 Amounts reclassified from accumulated other comprehensive income — 132 132 Net current-period other comprehensive income 7,735 4,736 12,471 Ending balance $ (4,969 ) $ (1,559 ) $ (6,528 ) Six months ended June 30, 2016 Beginning balance $ 386 $ (6,681 ) $ (6,295 ) Other comprehensive income before reclassifications 27,278 — 27,278 Amounts reclassified from accumulated other comprehensive income (loss) (384 ) 212 (172 ) Net current-period other comprehensive income 26,894 212 27,106 Ending balance $ 27,280 $ (6,469 ) $ 20,811 __________ (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 and six month periods ended June 30, 2017 and 2016 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended June 30, Six Months Ended June 30, Affected line Item in the Consolidated 2017 2016 2017 2016 Statement of Income (in thousands) Unrealized gains and losses on available-for-sale securities Investment securities gains $ — $ 229 $ — $ 602 Investment securities gains, net — 229 — 602 Total before tax — (83 ) — (218 ) Income tax provision $ — $ 146 $ — $ 384 Net of tax Amortization of pension plan liability Actuarial losses $ (71 ) $ (167 ) $ (207 ) $ (334 ) Compensation and employee benefits (71 ) (167 ) (207 ) (334 ) Total before tax 26 61 75 122 Income tax benefit $ (45 ) $ (106 ) $ (132 ) $ (212 ) Net of tax

Fair Value Accounting and Measu

Fair Value Accounting and Measurement	6 Months Ended
	Jun. 30, 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 June 30, 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 June 30, 2017 (in thousands) Assets Securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 1,423,958 $ — $ 1,423,958 $ — State and municipal debt securities 483,093 — 483,093 — U.S. government agency and government-sponsored enterprise securities 352,238 — 352,238 — U.S. government securities 250 250 — — Other securities 5,097 — 5,097 — Total securities available for sale $ 2,264,636 $ 250 $ 2,264,386 $ — Other assets (Interest rate contracts) $ 9,077 $ — $ 9,077 $ — Liabilities Other liabilities (Interest rate contracts) $ 9,096 $ — $ 9,096 $ — 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 six month periods ended June 30, 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 Losses During the Six Months Ended Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 7,019 $ — $ — $ 7,019 $ 3,669 $ 3,669 OREO 105 — — 105 33 33 $ 7,124 $ — $ — $ 7,124 $ 3,702 $ 3,702 Fair value at Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended Losses During the Six Months Ended June, 2016 Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 3,218 $ — $ — $ 3,218 $ 2,691 $ 2,691 OREO 6,338 — — 6,338 138 233 $ 9,556 $ — $ — $ 9,556 $ 2,829 $ 2,924 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) Impaired loans - collateral-dependent (3) $ 7,019 Fair Market Value of Collateral Adjustment to Stated Value 0.00% - 75.00% (60.59%) OREO $ 105 Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) (1) Discount applied to appraisal value or stated value (in the case of accounts receivable, fixed assets, and inventory). (2) Quantitative disclosures are not provided for OREO because there were no adjustments made to the appraisal values. (3) Collateral consists of accounts receivable, fixed assets, inventory, and real estate. Fair value at Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) Impaired loans - collateral-dependent (3) $ 303 Fair Market Value of Collateral Adjustment to Stated Value N/A (2) Impaired loans - other $ 2,915 Discounted Cash Flow Discount Rate 2.99% - 10.25% (6.03%) OREO $ 6,338 Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) (1) Discount rate used in discounted cash flow valuation. (2) Quantitative disclosures are not provided for collateral-dependent impaired loans and OREO because there were no adjustments made to the appraisal values or stated values during the current period. (3) Collateral consists of fixed assets and accounts receivable. 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 June 30, 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 June 30, 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 June 30, 2017 and December 31, 2016 : June 30, 2017 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 197,623 $ 197,623 $ 197,623 $ — $ — Interest-earning deposits with banks 14,425 14,425 14,425 — — Securities available for sale 2,264,636 2,264,636 250 2,264,386 — FHLB stock 16,360 16,360 — 16,360 — Loans held for sale 6,918 6,918 — 6,918 — Loans 6,350,090 6,233,490 — — 6,233,490 Interest rate contracts 9,077 9,077 — 9,077 — Liabilities Deposits $ 8,072,464 $ 8,067,980 $ 7,687,671 $ 380,309 $ — FHLB advances 159,474 160,397 — 160,397 — Repurchase agreements 65,895 66,102 — 66,102 — Interest rate contracts 9,096 9,096 — 9,096 — 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	6 Months Ended
	Jun. 30, 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 and six months ended June 30, 2017 and 2016 : Three Months Ended Six Months Ended June 30, June 30, 2017 2016 2017 2016 (in thousands except per share) Basic EPS: Net income $ 27,132 $ 25,405 $ 56,331 $ 46,664 Less: Earnings allocated to participating securities: Preferred shares — 45 3 82 Nonvested restricted shares 362 343 759 578 Earnings allocated to common shareholders $ 26,770 $ 25,017 $ 55,569 $ 46,004 Weighted average common shares outstanding 57,520 57,185 57,437 57,149 Basic earnings per common share $ 0.47 $ 0.44 $ 0.97 $ 0.80 Diluted EPS: Earnings allocated to common shareholders $ 26,770 $ 25,017 $ 55,569 $ 46,004 Weighted average common shares outstanding 57,520 57,185 57,437 57,149 Dilutive effect of equity awards 5 10 5 11 Weighted average diluted common shares outstanding 57,525 57,195 57,442 57,160 Diluted earnings per common share $ 0.47 $ 0.44 $ 0.97 $ 0.80 Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive 12 19 13 23

Subsequent event

Subsequent event	6 Months Ended
	Jun. 30, 2017
Subsequent Event [Line Items]
Subsequent Events [Text Block]	Subsequent Event In July 2017, we entered into an asset purchase agreement (the “Agreement”) with a third-party by which we transitioned our merchant services delivery from in-house to an outsourced model. The carrying amount of both assets and liabilities subject to this Agreement was zero . The sale transaction resulted in a one-time $14.0 million gain to be recognized in the third quarter of 2017. In addition to the one-time gain, prospectively Columbia will receive net monthly revenue from merchant services. If the Agreement is terminated by Columbia or the third-party during its initial ten-year term, we must pay the third-party a termination fee

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 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) June 30, 2017 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 1,438,875 $ 3,478 $ (18,395 ) $ 1,423,958 State and municipal securities 476,510 9,279 (2,696 ) 483,093 U.S. government agency and government-sponsored enterprise securities 352,039 1,486 (1,287 ) 352,238 U.S. government securities 251 — (1 ) 250 Other securities 5,284 70 (257 ) 5,097 Total $ 2,272,959 $ 14,313 $ (22,636 ) $ 2,264,636 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 proceeds and gross realized gains and losses on the sales of securities for the periods indicated: Three Months Ended Six Months Ended June 30, June 30, 2017 2016 2017 2016 (in thousands) Proceeds from sales of available for sale securities $ — $ 44,534 $ — $ 83,410 Gross realized gains $ — $ 229 $ — $ 602 Gross realized losses — — — — Net realized gains $ — $ 229 $ — $ 602
Schedule of Contractual Maturities of Investment Securities Available for Sale	The scheduled contractual maturities of investment securities available for sale at June 30, 2017 are presented as follows: June 30, 2017 Amortized Cost Fair Value (in thousands) Due within one year $ 99,775 $ 99,740 Due after one year through five years 461,043 464,716 Due after five years through ten years 726,133 724,520 Due after ten years 980,724 970,563 Other securities with no stated maturity 5,284 5,097 Total investment securities available-for-sale $ 2,272,959 $ 2,264,636
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: June 30, 2017 (in thousands) Washington and Oregon State to secure public deposits $ 244,580 Federal Reserve Bank to secure borrowings 54,877 Other securities pledged 122,932 Total securities pledged as collateral $ 422,389
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 June 30, 2017 and December 31, 2016 : Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized (in thousands) June 30, 2017 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 858,558 $ (12,683 ) $ 180,212 $ (5,712 ) $ 1,038,770 $ (18,395 ) State and municipal securities 108,038 (2,189 ) 13,246 (507 ) 121,284 (2,696 ) U.S. government agency and government-sponsored enterprise securities 194,738 (1,287 ) — — 194,738 (1,287 ) U.S. government securities 251 (1 ) — — 251 (1 ) Other securities 2,276 (39 ) 2,737 (218 ) 5,013 (257 ) Total $ 1,163,861 $ (16,199 ) $ 196,195 $ (6,437 ) $ 1,360,056 $ (22,636 ) 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)	6 Months Ended
	Jun. 30, 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): June 30, 2017 December 31, 2016 Loans, excluding PCI loans PCI Loans Total Loans, excluding PCI loans PCI Loans Total (in thousands) Commercial business $ 2,704,468 $ 15,299 $ 2,719,767 $ 2,551,054 $ 20,185 $ 2,571,239 Real estate: One-to-four family residential 173,150 14,735 187,885 170,331 17,862 188,193 Commercial and multifamily residential 2,787,560 84,385 2,871,945 2,719,830 89,231 2,809,061 Total real estate 2,960,710 99,120 3,059,830 2,890,161 107,093 2,997,254 Real estate construction: One-to-four family residential 139,956 453 140,409 121,887 832 122,719 Commercial and multifamily residential 195,565 961 196,526 209,118 1,565 210,683 Total real estate construction 335,521 1,414 336,935 331,005 2,397 333,402 Consumer 323,187 14,020 337,207 329,261 15,985 345,246 Less: Net unearned income (30,665 ) — (30,665 ) (33,718 ) — (33,718 ) Total loans, net of unearned income 6,293,221 129,853 6,423,074 6,067,763 145,660 6,213,423 Less: Allowance for loan and lease losses (64,923 ) (8,061 ) (72,984 ) (59,528 ) (10,515 ) (70,043 ) Total loans, net $ 6,228,298 $ 121,792 $ 6,350,090 $ 6,008,235 $ 135,145 $ 6,143,380 Loans held for sale $ 6,918 $ — $ 6,918 $ 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 June 30, 2017 and December 31, 2016 : June 30, 2017 December 31, 2016 Recorded Unpaid Principal Recorded Unpaid Principal (in thousands) Commercial business: Secured $ 24,663 $ 38,586 $ 11,524 $ 21,503 Unsecured 84 237 31 303 Real estate: One-to-four family residential 697 1,248 568 1,302 Commercial & multifamily residential: Commercial land 3,198 3,503 934 922 Income property 3,411 3,741 4,005 4,247 Owner occupied 658 2,137 6,248 9,030 Real estate construction: One-to-four family residential: Land and acquisition 27 27 14 102 Residential construction 214 214 549 549 Consumer 3,872 4,543 3,883 4,331 Total $ 36,824 $ 54,236 $ 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 June 30, 2017 and December 31, 2016 : Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans June 30, 2017 (in thousands) Commercial business: Secured $ 2,572,664 $ 5,227 $ 1,810 $ — $ 7,037 $ 24,663 $ 2,604,364 Unsecured 95,132 180 23 — 203 84 95,419 Real estate: One-to-four family residential 169,244 965 148 — 1,113 697 171,054 Commercial & multifamily residential: Commercial land 280,322 — — — — 3,198 283,520 Income property 1,351,539 561 256 — 817 3,411 1,355,767 Owner occupied 1,126,857 2,309 943 — 3,252 658 1,130,767 Real estate construction: One-to-four family residential: Land and acquisition 6,022 — — — — 27 6,049 Residential construction 132,953 — — — — 214 133,167 Commercial & multifamily residential: Income property 153,529 — — — — — 153,529 Owner occupied 35,416 4,050 — — 4,050 — 39,466 Consumer 314,196 1,748 303 — 2,051 3,872 320,119 Total $ 6,237,874 $ 15,040 $ 3,483 $ — $ 18,523 $ 36,824 $ 6,293,221 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 June 30, 2017 and December 31, 2016 : Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid June 30, 2017 (in thousands) Commercial business: Secured $ 2,580,972 $ 23,392 $ 10,275 $ 10,275 $ 3,425 $ 13,117 $ 18,238 Unsecured 95,419 — — — — — — Real estate: One-to-four family residential 170,271 783 320 574 4 463 908 Commercial & multifamily residential: Commercial land 280,721 2,799 — — — 2,799 2,787 Income property 1,352,109 3,658 525 530 25 3,133 3,422 Owner occupied 1,127,370 3,397 — — — 3,397 6,297 Real estate construction: One-to-four family residential: Land and acquisition 6,049 — — — — — — Residential construction 133,167 — — — — — — Commercial & multifamily residential: Income property 153,529 — — — — — — Owner occupied 39,466 — — — — — — Consumer 314,476 5,643 4,877 4,920 45 766 905 Total $ 6,253,549 $ 39,672 $ 15,997 $ 16,299 $ 3,499 $ 23,675 $ 32,557 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 and six month periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Average Recorded Interest Recognized Average Recorded Interest Recognized Average Recorded Interest Recognized Average Recorded Interest Recognized (in thousands) Commercial business: Secured $ 15,590 $ 50 $ 12,859 $ 20 $ 13,332 $ 69 $ 10,414 $ 33 Real estate: One-to-four family residential 648 21 676 (3 ) 608 22 879 3 Commercial & multifamily residential: Commercial land 2,549 — 354 — 1,936 — 236 — Income property 3,676 7 1,749 10 3,925 6 1,868 14 Owner occupied 3,453 192 5,102 — 4,107 192 5,420 — Real estate construction: One-to-four family residential: Land and acquisition — — 206 1 5 — 293 3 Residential construction — — 562 — 112 — 562 — Consumer 5,584 31 2,332 20 5,461 57 1,581 21 Total $ 31,500 $ 301 $ 23,840 $ 48 $ 29,486 $ 346 $ 21,253 $ 74
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 and six months ended June 30, 2017 and 2016 : Three months ended June 30, 2017 Three months ended June 30, 2016 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial business: Secured 2 $ 1,422 $ 1,422 2 $ 293 $ 293 Real estate: One-to-four family residential 1 382 382 — — — Commercial and multifamily residential: Owner occupied — — — 1 30 30 Consumer 8 815 815 14 2,214 2,214 Total 11 $ 2,619 $ 2,619 17 $ 2,537 $ 2,537 Six months ended June 30, 2017 Six months ended June 30, 2016 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial business: Secured 5 $ 1,778 $ 1,778 5 $ 1,663 $ 1,663 Real estate: One-to-four family residential 1 382 382 — — — Commercial and multifamily residential: Owner occupied — — — 2 280 280 Consumer 18 2,361 2,361 18 2,711 2,711 Total 24 $ 4,521 $ 4,521 25 $ 4,654 $ 4,654
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 June 30, 2017 and December 31, 2016 : June 30, 2017 December 31, 2016 (in thousands) Commercial business $ 16,608 $ 21,606 Real estate: One-to-four family residential 17,242 20,643 Commercial and multifamily residential 88,398 94,795 Total real estate 105,640 115,438 Real estate construction: One-to-four family residential 453 832 Commercial and multifamily residential 1,074 1,726 Total real estate construction 1,527 2,558 Consumer 15,527 17,649 Subtotal of PCI loans 139,302 157,251 Less: Valuation discount resulting from acquisition accounting 9,449 11,591 Allowance for loan losses 8,061 10,515 PCI loans, net of allowance for loan losses $ 121,792 $ 135,145
Changes in Accretable Yield for Acquired Loans	The following table shows the changes in accretable yield for PCI loans for the three and six months ended June 30, 2017 and 2016 : Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (in thousands) Balance at beginning of period $ 38,444 $ 56,607 $ 45,191 $ 58,981 Accretion (2,882 ) (3,774 ) (7,064 ) (8,003 ) Disposals — 149 (158 ) 1,910 Reclassifications from (to) nonaccretable difference 144 (73 ) (2,263 ) 21 Balance at end of period $ 35,706 $ 52,909 $ 35,706 $ 52,909

Allowance for Loan and Lease 26

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Tables)	6 Months Ended
	Jun. 30, 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 and six months ended June 30, 2017 and 2016 : Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General Three months ended June 30, 2017 (in thousands) Commercial business: Secured $ 35,672 $ (3,600 ) $ 2,903 $ 4,564 $ 39,539 $ 3,425 $ 36,114 Unsecured 1,188 — 41 (82 ) 1,147 — 1,147 Real estate: One-to-four family residential 645 (153 ) 223 (87 ) 628 4 624 Commercial & multifamily residential: Commercial land 2,288 — — 68 2,356 — 2,356 Income property 6,803 — 60 (9 ) 6,854 25 6,829 Owner occupied 6,534 — 67 (89 ) 6,512 — 6,512 Real estate construction: One-to-four family residential: Land and acquisition 509 — 27 (175 ) 361 — 361 Residential construction 1,109 — 31 237 1,377 — 1,377 Commercial & multifamily residential: Income property 782 — — 203 985 — 985 Owner occupied 1,768 — — (386 ) 1,382 — 1,382 Consumer 3,360 (465 ) 248 408 3,551 45 3,506 Purchased credit impaired 9,395 (1,800 ) 1,204 (738 ) 8,061 — 8,061 Unallocated 968 — — (737 ) 231 — 231 Total $ 71,021 $ (6,018 ) $ 4,804 $ 3,177 $ 72,984 $ 3,499 $ 69,485 Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General Six months ended June 30, 2017 (in thousands) Commercial business: Secured $ 36,050 $ (4,709 ) $ 3,200 $ 4,998 $ 39,539 $ 3,425 $ 36,114 Unsecured 960 (18 ) 109 96 1,147 — 1,147 Real estate: One-to-four family residential 599 (460 ) 340 149 628 4 624 Commercial & multifamily residential: Commercial land 1,797 — — 559 2,356 — 2,356 Income property 7,342 — 95 (583 ) 6,854 25 6,829 Owner occupied 6,439 — 110 (37 ) 6,512 — 6,512 Real estate construction: One-to-four family residential: Land and acquisition 316 (14 ) 47 12 361 — 361 Residential construction 669 — 40 668 1,377 — 1,377 Commercial & multifamily residential: Income property 404 — — 581 985 — 985 Owner occupied 1,192 — — 190 1,382 — 1,382 Consumer 3,534 (893 ) 533 377 3,551 45 3,506 Purchased credit impaired 10,515 (3,739 ) 2,348 (1,063 ) 8,061 — 8,061 Unallocated 226 — — 5 231 — 231 Total $ 70,043 $ (9,833 ) $ 6,822 $ 5,952 $ 72,984 $ 3,499 $ 69,485 Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General Three months ended June 30, 2016 (in thousands) Commercial business: Secured $ 32,114 $ (2,900 ) $ 728 $ 1,866 $ 31,808 $ 2,486 $ 29,322 Unsecured 1,300 (41 ) 25 (19 ) 1,265 — 1,265 Real estate: One-to-four family residential 654 (35 ) 20 35 674 1 673 Commercial & multifamily residential: Commercial land 1,262 (26 ) 2 184 1,422 — 1,422 Income property 7,402 — 120 524 8,046 100 7,946 Owner occupied 6,086 — 8 242 6,336 — 6,336 Real estate construction: One-to-four family residential: Land and acquisition 640 — 2 (55 ) 587 — 587 Residential construction 1,449 — 3 (76 ) 1,376 — 1,376 Commercial & multifamily residential: Income property 715 — 1 188 904 — 904 Owner occupied 1,210 — — 174 1,384 — 1,384 Consumer 3,368 (334 ) 201 325 3,560 118 3,442 Purchased credit impaired 13,064 (2,898 ) 1,524 91 11,781 — 11,781 Unallocated — — — 161 161 — 161 Total $ 69,264 $ (6,234 ) $ 2,634 $ 3,640 $ 69,304 $ 2,705 $ 66,599 Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General Six months ended June 30, 2016 (in thousands) Commercial business: Secured $ 32,321 $ (6,670 ) $ 1,339 $ 4,818 $ 31,808 $ 2,486 $ 29,322 Unsecured 1,299 (44 ) 76 (66 ) 1,265 — 1,265 Real estate: One-to-four family residential 916 (35 ) 61 (268 ) 674 1 673 Commercial & multifamily residential: Commercial land 1,178 (26 ) 2 268 1,422 — 1,422 Income property 6,616 — 181 1,249 8,046 100 7,946 Owner occupied 5,550 — 16 770 6,336 — 6,336 Real estate construction: One-to-four family residential: Land and acquisition 339 — 53 195 587 — 587 Residential construction 733 — 206 437 1,376 — 1,376 Commercial & multifamily residential: Income property 388 — 2 514 904 — 904 Owner occupied 1,006 — — 378 1,384 — 1,384 Consumer 3,531 (600 ) 366 263 3,560 118 3,442 Purchased credit impaired 13,726 (5,764 ) 3,075 744 11,781 — 11,781 Unallocated 569 — — (408 ) 161 — 161 Total $ 68,172 $ (13,139 ) $ 5,377 $ 8,894 $ 69,304 $ 2,705 $ 66,599
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 Six Months Ended June 30, June 30, 2017 2016 2017 2016 (in thousands) Balance at beginning of period $ 3,555 $ 2,930 $ 2,705 $ 2,930 Net changes in the allowance for unfunded commitments and letters of credit — (150 ) 850 (150 ) Balance at end of period $ 3,555 $ 2,780 $ 3,555 $ 2,780
Financing Receivable Credit Quality Indicators	The following is an analysis of the credit quality of our loan portfolio, excluding PCI loans, as of June 30, 2017 and December 31, 2016 : Pass Special Mention Substandard Doubtful Loss Total June 30, 2017 (in thousands) Loans, excluding PCI loans: Commercial business: Secured $ 2,423,195 $ 74,148 $ 107,021 $ — $ — $ 2,604,364 Unsecured 93,716 701 1,002 — — 95,419 Real estate: One-to-four family residential 168,062 1,204 1,788 — — 171,054 Commercial and multifamily residential: Commercial land 274,000 4,761 4,759 — — 283,520 Income property 1,328,708 8,678 18,381 — — 1,355,767 Owner occupied 1,098,775 8,269 23,723 — — 1,130,767 Real estate construction: One-to-four family residential: Land and acquisition 6,022 — 27 — — 6,049 Residential construction 132,555 399 213 — — 133,167 Commercial and multifamily residential: Income property 153,529 — — — — 153,529 Owner occupied 35,416 — 4,050 — — 39,466 Consumer 311,990 2 8,127 — — 320,119 Total $ 6,025,968 $ 98,162 $ 169,091 $ — $ — 6,293,221 Less: Allowance for loan and lease losses 64,923 Loans, excluding PCI loans, net $ 6,228,298 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 June 30, 2017 and December 31, 2016 : Pass Special Mention Substandard Doubtful Loss Total June 30, 2017 (in thousands) PCI loans: Commercial business: Secured $ 14,930 $ 87 $ 819 $ — $ — $ 15,836 Unsecured 703 — 69 — — 772 Real estate: One-to-four family residential 16,379 — 863 — — 17,242 Commercial and multifamily residential: Commercial land 10,411 — — — — 10,411 Income property 26,047 — 138 — — 26,185 Owner occupied 50,999 — 803 — — 51,802 Real estate construction: One-to-four family residential: Land and acquisition 382 — 71 — — 453 Commercial and multifamily residential: Income property 786 — — — — 786 Owner occupied 288 — — — — 288 Consumer 14,998 — 529 — — 15,527 Total $ 135,923 $ 87 $ 3,292 $ — $ — 139,302 Less: Valuation discount resulting from acquisition accounting 9,449 Allowance for loan losses 8,061 PCI loans, net $ 121,792 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 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)	6 Months Ended
	Jun. 30, 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 and six months ended June 30, 2017 and 2016 : Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (in thousands) Balance, beginning of period $ 4,519 $ 12,427 $ 5,998 $ 13,738 Transfers in — 206 — 311 Valuation adjustments (33 ) (139 ) (226 ) (276 ) Proceeds from sale of OREO property (444 ) (1,950 ) (1,719 ) (3,276 ) Gain on sale of OREO, net 16 69 5 116 Balance, end of period $ 4,058 $ 10,613 $ 4,058 $ 10,613

Covered Assets and FDIC Loss-28

Covered Assets and FDIC Loss-sharing Asset (Tables)	6 Months Ended
	Jun. 30, 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 and six months ended June 30, 2017 and 2016 : Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 (in thousands) Balance at beginning of period $ 3,239 $ 5,954 $ 3,535 $ 6,568 Adjustments not reflected in income: Cash paid to (received from) the FDIC, net — (396 ) 184 (43 ) FDIC reimbursable losses (recoveries), net 57 (302 ) (149 ) (166 ) Termination of FDIC loss-sharing agreements (3,123 ) — (3,123 ) — Adjustments reflected in noninterest income (1): Amortization, net (99 ) (883 ) (414 ) (2,215 ) Loan impairment (recapture) — (20 ) 40 127 Sale of other real estate 11 (24 ) 18 120 Valuation adjustments of other real estate owned — (40 ) — (22 ) Other (85 ) (23 ) (91 ) (103 ) Balance at end of period $ — $ 4,266 $ — $ 4,266 __________ (1) Amounts shown in the table above for adjustments reflected in noninterest income include only those adjustments recorded to the noninterest income line item “Change in FDIC loss-sharing asset” in the Consolidated Statements of Income and do not include the charge related to the termination of the FDIC loss-sharing agreements.

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 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 June 30, Six Months Ended June 30, 2017 2016 2017 2016 (in thousands) Goodwill Total goodwill $ 382,762 $ 382,762 $ 382,762 $ 382,762 Other intangible assets, net Core deposit intangible: Gross core deposit intangible balance at beginning of period 58,598 58,598 58,598 58,598 Accumulated amortization at beginning of period (43,235 ) (37,523 ) (41,886 ) (35,940 ) Core deposit intangible, net at beginning of period 15,363 21,075 16,712 22,658 CDI current period amortization (1,249 ) (1,483 ) (2,598 ) (3,066 ) Total core deposit intangible, net at end of period 14,114 19,592 14,114 19,592 Intangible assets not subject to amortization 919 919 919 919 Other intangible assets, net at end of period 15,033 20,511 15,033 20,511 Total goodwill and other intangible assets at end of period $ 397,795 $ 403,273 $ 397,795 $ 403,273
Estimated Future Amortization Expense of Core Deposit Intangibles	The following table provides the estimated future amortization expense of core deposit intangibles for the remaining six months ending December 31, 2017 and the succeeding four years: Amount (in thousands) Year ending December 31, 2017 $ 2,315 2018 3,855 2019 2,951 2020 2,048 2021 1,440

Derivatives and Balance Sheet30

Derivatives and Balance Sheet Offsetting (Tables)	6 Months Ended
	Jun. 30, 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 June 30, 2017 (in thousands) Assets Interest rate contracts $ 9,077 $ — $ 9,077 $ — $ 9,077 Liabilities Interest rate contracts $ 9,096 $ — $ 9,096 $ (9,096 ) $ — Repurchase agreements $ 65,895 $ — $ 65,895 $ (65,895 ) $ — 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: June 30, 2017 (in thousands) Washington and Oregon State to secure public deposits $ 244,580 Federal Reserve Bank to secure borrowings 54,877 Other securities pledged 122,932 Total securities pledged as collateral $ 422,389
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 June 30, 2017 and December 31, 2016 : Asset Derivatives Liability Derivatives June 30, 2017 December 31, 2016 June 30, 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 $ 9,077 Other assets $ 9,012 Other liabilities $ 9,096 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 June 30, 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 $ 40,895 $ — $ — $ 25,000 $ 65,895 Gross amount of recognized liabilities for repurchase agreements 65,895 Amounts related to agreements not included in offsetting disclosure $ —

Accumulated Other Comprehensi31

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 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 and six month periods ended June 30, 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 June 30, 2017 (in thousands) Beginning balance $ (11,002 ) $ (1,604 ) $ (12,606 ) Other comprehensive income before reclassifications 6,033 — 6,033 Amounts reclassified from accumulated other comprehensive income — 45 45 Net current-period other comprehensive income 6,033 45 6,078 Ending balance $ (4,969 ) $ (1,559 ) $ (6,528 ) Three months ended June 30, 2016 Beginning balance $ 18,918 $ (6,575 ) $ 12,343 Other comprehensive income before reclassifications 8,508 — 8,508 Amounts reclassified from accumulated other comprehensive income (loss) (146 ) 106 (40 ) Net current-period other comprehensive income 8,362 106 8,468 Ending balance $ 27,280 $ (6,469 ) $ 20,811 Six months ended June 30, 2017 Beginning balance $ (12,704 ) $ (6,295 ) $ (18,999 ) Other comprehensive income before reclassifications 7,735 4,604 12,339 Amounts reclassified from accumulated other comprehensive income — 132 132 Net current-period other comprehensive income 7,735 4,736 12,471 Ending balance $ (4,969 ) $ (1,559 ) $ (6,528 ) Six months ended June 30, 2016 Beginning balance $ 386 $ (6,681 ) $ (6,295 ) Other comprehensive income before reclassifications 27,278 — 27,278 Amounts reclassified from accumulated other comprehensive income (loss) (384 ) 212 (172 ) Net current-period other comprehensive income 26,894 212 27,106 Ending balance $ 27,280 $ (6,469 ) $ 20,811 __________ (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 and six month periods ended June 30, 2017 and 2016 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended June 30, Six Months Ended June 30, Affected line Item in the Consolidated 2017 2016 2017 2016 Statement of Income (in thousands) Unrealized gains and losses on available-for-sale securities Investment securities gains $ — $ 229 $ — $ 602 Investment securities gains, net — 229 — 602 Total before tax — (83 ) — (218 ) Income tax provision $ — $ 146 $ — $ 384 Net of tax Amortization of pension plan liability Actuarial losses $ (71 ) $ (167 ) $ (207 ) $ (334 ) Compensation and employee benefits (71 ) (167 ) (207 ) (334 ) Total before tax 26 61 75 122 Income tax benefit $ (45 ) $ (106 ) $ (132 ) $ (212 ) Net of tax

Fair Value Accounting and Mea32

Fair Value Accounting and Measurement (Tables)	6 Months Ended
	Jun. 30, 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 June 30, 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 June 30, 2017 (in thousands) Assets Securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 1,423,958 $ — $ 1,423,958 $ — State and municipal debt securities 483,093 — 483,093 — U.S. government agency and government-sponsored enterprise securities 352,238 — 352,238 — U.S. government securities 250 250 — — Other securities 5,097 — 5,097 — Total securities available for sale $ 2,264,636 $ 250 $ 2,264,386 $ — Other assets (Interest rate contracts) $ 9,077 $ — $ 9,077 $ — Liabilities Other liabilities (Interest rate contracts) $ 9,096 $ — $ 9,096 $ — 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 Losses During the Six Months Ended Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 7,019 $ — $ — $ 7,019 $ 3,669 $ 3,669 OREO 105 — — 105 33 33 $ 7,124 $ — $ — $ 7,124 $ 3,702 $ 3,702 Fair value at Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended Losses During the Six Months Ended June, 2016 Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 3,218 $ — $ — $ 3,218 $ 2,691 $ 2,691 OREO 6,338 — — 6,338 138 233 $ 9,556 $ — $ — $ 9,556 $ 2,829 $ 2,924
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 June 30, 2017 and December 31, 2016 : June 30, 2017 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 197,623 $ 197,623 $ 197,623 $ — $ — Interest-earning deposits with banks 14,425 14,425 14,425 — — Securities available for sale 2,264,636 2,264,636 250 2,264,386 — FHLB stock 16,360 16,360 — 16,360 — Loans held for sale 6,918 6,918 — 6,918 — Loans 6,350,090 6,233,490 — — 6,233,490 Interest rate contracts 9,077 9,077 — 9,077 — Liabilities Deposits $ 8,072,464 $ 8,067,980 $ 7,687,671 $ 380,309 $ — FHLB advances 159,474 160,397 — 160,397 — Repurchase agreements 65,895 66,102 — 66,102 — Interest rate contracts 9,096 9,096 — 9,096 — 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) Impaired loans - collateral-dependent (3) $ 7,019 Fair Market Value of Collateral Adjustment to Stated Value 0.00% - 75.00% (60.59%) OREO $ 105 Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) (1) Discount applied to appraisal value or stated value (in the case of accounts receivable, fixed assets, and inventory). (2) Quantitative disclosures are not provided for OREO because there were no adjustments made to the appraisal values. (3) Collateral consists of accounts receivable, fixed assets, inventory, and real estate. Fair value at Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) Impaired loans - collateral-dependent (3) $ 303 Fair Market Value of Collateral Adjustment to Stated Value N/A (2) Impaired loans - other $ 2,915 Discounted Cash Flow Discount Rate 2.99% - 10.25% (6.03%) OREO $ 6,338 Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) (1) Discount rate used in discounted cash flow valuation. (2) Quantitative disclosures are not provided for collateral-dependent impaired loans and OREO because there were no adjustments made to the appraisal values or stated values during the current period. (3) Collateral consists of fixed assets and accounts receivable.

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	6 Months Ended
	Jun. 30, 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 and six months ended June 30, 2017 and 2016 : Three Months Ended Six Months Ended June 30, June 30, 2017 2016 2017 2016 (in thousands except per share) Basic EPS: Net income $ 27,132 $ 25,405 $ 56,331 $ 46,664 Less: Earnings allocated to participating securities: Preferred shares — 45 3 82 Nonvested restricted shares 362 343 759 578 Earnings allocated to common shareholders $ 26,770 $ 25,017 $ 55,569 $ 46,004 Weighted average common shares outstanding 57,520 57,185 57,437 57,149 Basic earnings per common share $ 0.47 $ 0.44 $ 0.97 $ 0.80 Diluted EPS: Earnings allocated to common shareholders $ 26,770 $ 25,017 $ 55,569 $ 46,004 Weighted average common shares outstanding 57,520 57,185 57,437 57,149 Dilutive effect of equity awards 5 10 5 11 Weighted average diluted common shares outstanding 57,525 57,195 57,442 57,160 Diluted earnings per common share $ 0.47 $ 0.44 $ 0.97 $ 0.80 Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive 12 19 13 23

Accounting Pronouncements Rec34

Accounting Pronouncements Recently Issued Narrative - Impact of implementation of new accounting standards (Details) - Accounting Standards Update 2016-09 [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 67
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	$ 100	$ 1,300
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Diluted Earnings Per Share		$ 0.02
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			(117)
Common Stock [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 184

Securities (Securities Availabl

Securities (Securities Available for Sale) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds	$ 0	$ 44,534	$ 0	$ 83,410
Securities available-for-sale, amortized cost	2,272,959		2,272,959		$ 2,299,037
Available-for-sale Debt Securities Gross Unrealized Gain, instant	14,313		14,313		10,231
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(22,636)		(22,636)		(30,691)
Securities available for sale	2,264,636		2,264,636		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	1,438,875		1,438,875		1,486,690
Available-for-sale Debt Securities Gross Unrealized Gain, instant	3,478		3,478		2,760
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(18,395)		(18,395)		(23,718)
Securities available for sale	1,423,958		1,423,958		1,465,732
State and Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized cost	476,510		476,510		473,914
Available-for-sale Debt Securities Gross Unrealized Gain, instant	9,279		9,279		6,343
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(2,696)		(2,696)		(5,197)
Securities available for sale	483,093		483,093		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	352,039		352,039		332,348
Available-for-sale Debt Securities Gross Unrealized Gain, instant	1,486		1,486		1,065
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(1,287)		(1,287)		(1,511)
Securities available for sale	352,238		352,238		331,902
US Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized cost	251		251		801
Available-for-sale Debt Securities Gross Unrealized Gain, instant	0		0		0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(1)		(1)		(1)
Securities available for sale	250		250		800
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized cost	5,284		5,284		5,284
Available-for-sale Debt Securities Gross Unrealized Gain, instant	70		70		63
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(257)		(257)		(264)
Securities available for sale	$ 5,097		$ 5,097		$ 5,083

Securities (Schedule of Contrac

Securities (Schedule of Contractual Maturities of Investment Securities Available for Sale) (Details) $ in Thousands	Jun. 30, 2017USD ($)
Available-for-sale Securities [Abstract]
Due within one year, Amortized Cost	$ 99,775
Due after one year through five years, Amortized Cost	461,043
Due after five years through ten years, Amortized Cost	726,133
Due after ten years, Amortized Cost	980,724
No stated maturity date, Amortized Cost Basis	5,284
Total investment securities available-for-sale, Amortized Cost	2,272,959
Due within one year, Fair Value	99,740
Due after one year through five years, Fair Value	464,716
Due after five years through ten years, Fair Value	724,520
Due after ten years, Fair Value	970,563
No stated maturity date, Fair Value	5,097
Total investment securities available-for-sale, Fair Value	$ 2,264,636

Securities (Carrying Value of S

Securities (Carrying Value of Securities Pledged as Collateral) (Details) $ in Thousands	Jun. 30, 2017USD ($)
Schedule of Available-for-sale Securities [Line Items]
Carrying amount of securities pledged as collateral	$ 422,389
Washington and Oregon State Public Deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Carrying amount of securities pledged as collateral	244,580
Federal Reserve Bank Advances [Member]
Schedule of Available-for-sale Securities [Line Items]
Carrying amount of securities pledged as collateral	54,877
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Carrying amount of securities pledged as collateral	$ 122,932

Securities (Summary of Gross Un

Securities (Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities Gross Unrealized Gain, instant	$ 14,313	$ 10,231
Less than 12 Months Fair Value	1,163,861	1,461,783
Less than 12 Months Unrealized Losses	(16,199)	(25,415)
12 Months or More Fair Value	196,195	165,173
12 Months or More Unrealized Losses	(6,437)	(5,276)
Total Fair Value	1,360,056	1,626,956
Total Unrealized Losses	(22,636)	(30,691)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	22,636	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	3,478	2,760
Less than 12 Months Fair Value	858,558	1,029,116
Less than 12 Months Unrealized Losses	(12,683)	(18,788)
12 Months or More Fair Value	180,212	159,046
12 Months or More Unrealized Losses	(5,712)	(4,930)
Total Fair Value	1,038,770	1,188,162
Total Unrealized Losses	(18,395)	(23,718)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	18,395	23,718
State and Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities Gross Unrealized Gain, instant	9,279	6,343
Less than 12 Months Fair Value	108,038	211,342
Less than 12 Months Unrealized Losses	(2,189)	(5,064)
12 Months or More Fair Value	13,246	3,384
12 Months or More Unrealized Losses	(507)	(133)
Total Fair Value	121,284	214,726
Total Unrealized Losses	(2,696)	(5,197)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	2,696	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	1,486	1,065
Less than 12 Months Fair Value	194,738	218,811
Less than 12 Months Unrealized Losses	(1,287)	(1,511)
12 Months or More Fair Value	0	0
12 Months or More Unrealized Losses	0	0
Total Fair Value	194,738	218,811
Total Unrealized Losses	(1,287)	(1,511)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	1,287	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	(1)	(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	(1)	(1)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	1	1
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities Gross Unrealized Gain, instant	70	63
Less than 12 Months Fair Value	2,276	2,263
Less than 12 Months Unrealized Losses	(39)	(51)
12 Months or More Fair Value	2,737	2,743
12 Months or More Unrealized Losses	(218)	(213)
Total Fair Value	5,013	5,006
Total Unrealized Losses	(257)	(264)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	$ 257	$ 264

Securities (Narrative) (Details

Securities (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)security	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)security	Jun. 30, 2016USD ($)
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds | $	$ 0	$ 44,534	$ 0	$ 83,410
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	172		172
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	54		54
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	99		99
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	11		11
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	22		22
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	0		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		0
Number Of Securities In Unrealized Loss Position	1		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		2
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	1		1

Securities Securities (Summary

Securities Securities (Summary of Gross Realized Gains and Gross Realized Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds	$ 0	$ 44,534	$ 0	$ 83,410
Available-for-sale Securities, Gross Realized Gains	0	229	0	602
Available-for-sale Securities, Gross Realized Losses	0	0	0	0
Investment securities gains, net	$ 0	$ 229	$ 0	$ 602

Loans (Narrative) (Details)

Loans (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)contract	Jun. 30, 2016contract	Jun. 30, 2017USD ($)contract	Jun. 30, 2016contract	Dec. 31, 2016USD ($)
Financing Receivable, Recorded Investment [Line Items]
Loans to related parties	$ 10,100		$ 10,100		$ 10,100
Loans and Leases Receivable, Related Parties, Additions			203
Repayments on related party loans			$ 200
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract	0	0	0	0
Loans Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 2,280,000		$ 2,280,000		2,290,000
Federal Reserve Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 70,100		$ 70,100		$ 54,200

Loans (Analysis of Loan Portfol

Loans (Analysis of Loan Portfolio by Major Types of Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Less: unearned income on loans	$ (30,665)		$ (33,718)
Recorded Investment	6,423,074		6,213,423
Allowance for loan losses	(72,984)	$ (71,021)	(70,043)	$ (69,304)	$ (69,264)	$ (68,172)
Loans, net	6,350,090		6,143,380
Loans held for sale	6,918		5,846
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Less: unearned income on loans	(30,665)		(33,718)
Recorded Investment	6,293,221		6,067,763
Allowance for loan losses	(64,923)		(59,528)
Loans, net	6,228,298		6,008,235
Loans held for sale	6,918		5,846
Loans and Leases Receivable, Gross	6,293,221		6,067,763
Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Less: unearned income on loans	0		0
Recorded Investment	129,853		145,660
Allowance for loan losses	(8,061)		(10,515)
Loans, net	121,792		135,145
Loans held for sale	0		0
Loans and Leases Receivable, Gross	139,302		157,251
Acquisition Accounting Valuation Discount on Covered Loans	9,449		11,591
Commercial and Multifamily Residential Construction [Domain] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	1,074		1,726
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage	187,885		188,193
Loans and Leases Receivable, Gross, Consumer, Construction	140,409		122,719
Allowance for loan losses	(628)	(645)	(599)	(674)	(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	173,150		170,331
Loans and Leases Receivable, Gross, Consumer, Construction	139,956		121,887
Loans and Leases Receivable, Gross	171,054		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	14,735		17,862
Loans and Leases Receivable, Gross, Consumer, Construction	453		832
Loans and Leases Receivable, Gross	17,242		20,643
Commercial and Multifamily Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Mortgage	2,871,945		2,809,061
Loans Receivable, Gross, Commercial, Construction	196,526		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	2,787,560		2,719,830
Loans Receivable, Gross, Commercial, Construction	195,565		209,118
Commercial and Multifamily Residential [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Mortgage	84,385		89,231
Loans Receivable, Gross, Commercial, Construction	961		1,565
Loans and Leases Receivable, Gross	88,398		94,795
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial and Industrial	2,719,767		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	2,704,468		2,551,054
Commercial Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial and Industrial	15,299		20,185
Loans and Leases Receivable, Gross	16,608		21,606
Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Mortgage	3,059,830		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	2,960,710		2,890,161
Real Estate Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Mortgage	99,120		107,093
Loans and Leases Receivable, Gross	105,640		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	453		832
Real Estate Construction Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Construction	336,935		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	335,521		331,005
Real Estate Construction Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Construction	1,414		2,397
Loans and Leases Receivable, Gross	1,527		2,558
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer	337,207		345,246
Allowance for loan losses	(3,551)	$ (3,360)	(3,534)	$ (3,560)	$ (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	323,187		329,261
Loans and Leases Receivable, Gross	320,119		324,522
Consumer Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer	14,020		15,985
Loans and Leases Receivable, Gross	$ 15,527		$ 17,649

Loans (Analysis of Nonaccrual L

Loans (Analysis of Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	$ 36,824	$ 27,756
Unpaid Principal Balance Nonaccrual Loans	54,236	42,289
Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	24,663	11,524
Unpaid Principal Balance Nonaccrual Loans	38,586	21,503
Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	84	31
Unpaid Principal Balance Nonaccrual Loans	237	303
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	697	568
Unpaid Principal Balance Nonaccrual Loans	1,248	1,302
Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	3,198	934
Unpaid Principal Balance Nonaccrual Loans	3,503	922
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	3,411	4,005
Unpaid Principal Balance Nonaccrual Loans	3,741	4,247
Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	658	6,248
Unpaid Principal Balance Nonaccrual Loans	2,137	9,030
Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	27	14
Unpaid Principal Balance Nonaccrual Loans	27	102
Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	214	549
Unpaid Principal Balance Nonaccrual Loans	214	549
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	3,872	3,883
Unpaid Principal Balance Nonaccrual Loans	$ 4,543	$ 4,331

Loans (Analysis of the Aged Loa

Loans (Analysis of the Aged Loan Portfolio) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	$ 36,824	$ 27,756
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	6,237,874	6,031,078
Past Due Loans	18,523	8,929
Nonaccrual Loans	36,824	27,756
Loans Receivable, Net	6,293,221	6,067,763
Secured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	24,663	11,524
Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	2,572,664	2,439,250
Past Due Loans	7,037	816
Nonaccrual Loans	24,663	11,524
Loans Receivable, Net	2,604,364	2,451,590
Unsecured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	84	31
Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	95,132	94,118
Past Due Loans	203	588
Nonaccrual Loans	84	31
Loans Receivable, Net	95,419	94,737
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	697	568
One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	169,244	164,416
Past Due Loans	1,113	2,948
Nonaccrual Loans	697	568
Loans Receivable, Net	171,054	167,932
Commercial Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	3,198	934
Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	280,322	269,816
Past Due Loans	0	64
Nonaccrual Loans	3,198	934
Loans Receivable, Net	283,520	270,814
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	3,411	4,005
Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,351,539	1,365,150
Past Due Loans	817	591
Nonaccrual Loans	3,411	4,005
Loans Receivable, Net	1,355,767	1,369,746
Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	658	6,248
Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,126,857	1,052,078
Past Due Loans	3,252	1,652
Nonaccrual Loans	658	6,248
Loans Receivable, Net	1,130,767	1,059,978
Land And Acquisition [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	27	14
Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	6,022	11,542
Past Due Loans	0	0
Nonaccrual Loans	27	14
Loans Receivable, Net	6,049	11,556
Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	214	549
Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	132,953	109,080
Past Due Loans	0	0
Nonaccrual Loans	214	549
Loans Receivable, Net	133,167	109,629
Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	153,529	103,779
Past Due Loans	0	0
Nonaccrual Loans	0	0
Loans Receivable, Net	153,529	103,779
Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	35,416	103,480
Past Due Loans	4,050	0
Nonaccrual Loans	0	0
Loans Receivable, Net	39,466	103,480
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	3,872	3,883
Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	314,196	318,369
Past Due Loans	2,051	2,270
Nonaccrual Loans	3,872	3,883
Loans Receivable, Net	320,119	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	3,483	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	1,810	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	23	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	148	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	256	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	943	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	303	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	15,040	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	5,227	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	180	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	965	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	561	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	2,309	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	0	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	0	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	4,050	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	1,748	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		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	$ 6,253,549		$ 6,253,549		$ 6,042,304
Recorded Investment of Loans Individually Measured for Specific Impairment	39,672		39,672		25,459
Recorded Investment	23,675		23,675		17,592
Unpaid Principal Balance	32,557		32,557		27,228
Related Allowance	3,499		3,499		761
Average Recorded Investment Impaired Loans	31,500	$ 23,840	29,486	$ 21,253
Interest Recognized on Impaired Loans	301	48	346	74
Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	2,580,972		2,580,972		2,442,772
Recorded Investment of Loans Individually Measured for Specific Impairment	23,392		23,392		8,818
Recorded Investment	10,275		10,275		2,414
Unpaid Principal Balance	10,275		10,275		2,484
Related Allowance	3,425		3,425		664
Average Recorded Investment Impaired Loans	15,590	12,859	13,332	10,414
Interest Recognized on Impaired Loans	50	20	69	33
Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	95,419		95,419		94,737
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0		0
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	170,271		170,271		167,403
Recorded Investment of Loans Individually Measured for Specific Impairment	783		783		529
Recorded Investment	320		320		435
Unpaid Principal Balance	574		574		693
Related Allowance	4		4		12
Average Recorded Investment Impaired Loans	648	676	608	879
Interest Recognized on Impaired Loans	21	(3)	22	3
Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	280,721		280,721		270,106
Recorded Investment of Loans Individually Measured for Specific Impairment	2,799		2,799		708
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Average Recorded Investment Impaired Loans	2,549	354	1,936	236
Interest Recognized on Impaired Loans	0	0	0	0
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,352,109		1,352,109		1,365,321
Recorded Investment of Loans Individually Measured for Specific Impairment	3,658		3,658		4,425
Recorded Investment	525		525		540
Unpaid Principal Balance	530		530		544
Related Allowance	25		25		27
Average Recorded Investment Impaired Loans	3,676	1,749	3,925	1,868
Interest Recognized on Impaired Loans	7	10	6	14
Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,127,370		1,127,370		1,054,564
Recorded Investment of Loans Individually Measured for Specific Impairment	3,397		3,397		5,414
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Average Recorded Investment Impaired Loans	3,453	5,102	4,107	5,420
Interest Recognized on Impaired Loans	192	0	192	0
Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	6,049		6,049		11,542
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0		14
Recorded Investment	0		0		14
Unpaid Principal Balance	0		0		102
Related Allowance	0		0		1
Average Recorded Investment Impaired Loans	0	206	5	293
Interest Recognized on Impaired Loans	0	1	0	3
Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	133,167		133,167		109,293
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0		336
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Average Recorded Investment Impaired Loans	0	562	112	562
Interest Recognized on Impaired Loans	0	0	0	0
Income Property Multifamily Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	153,529		153,529		103,779
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0		0
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Owner Occupied Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	39,466		39,466		103,480
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0		0
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	314,476		314,476		319,307
Recorded Investment of Loans Individually Measured for Specific Impairment	5,643		5,643		5,215
Recorded Investment	4,877		4,877		4,464
Unpaid Principal Balance	4,920		4,920		4,558
Related Allowance	45		45		57
Average Recorded Investment Impaired Loans	5,584	2,332	5,461	1,581
Interest Recognized on Impaired Loans	31	$ 20	57	$ 21
Impaired Loans With Recorded Allowance [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	15,997		15,997		7,867
Unpaid Principal Balance	16,299		16,299		8,381
Impaired Loans Without Recorded Allowance [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	13,117		13,117		6,404
Unpaid Principal Balance	18,238		18,238		12,831
Impaired Loans Without Recorded Allowance [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Impaired Loans Without Recorded Allowance [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	463		463		94
Unpaid Principal Balance	908		908		291
Impaired Loans Without Recorded Allowance [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	2,799		2,799		708
Unpaid Principal Balance	2,787		2,787		687
Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	3,133		3,133		3,885
Unpaid Principal Balance	3,422		3,422		4,148
Impaired Loans Without Recorded Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	3,397		3,397		5,414
Unpaid Principal Balance	6,297		6,297		8,102
Impaired Loans Without Recorded Allowance [Member] | Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Impaired Loans Without Recorded Allowance [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		336
Unpaid Principal Balance	0		0		336
Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Impaired Loans Without Recorded Allowance [Member] | Owner Occupied Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Impaired Loans Without Recorded Allowance [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	766		766		751
Unpaid Principal Balance	$ 905		$ 905		$ 833

Loans Loans (Analysis of Troubl

Loans Loans (Analysis of Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)Modificationscontract	Jun. 30, 2016USD ($)Modificationscontract	Jun. 30, 2017USD ($)Modificationscontract	Jun. 30, 2016USD ($)Modificationscontract	Dec. 31, 2016USD ($)
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract	0	0	0	0
Loans and Leases Receivable, Related Parties	$ 10,100		$ 10,100		$ 10,100
Financing Receivable Modifications Additional Commitment To Lend	$ 371		$ 371		$ 508
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	11	17	24	25
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 2,619	$ 2,537	$ 4,521	$ 4,654
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 2,619	$ 2,537	$ 4,521	$ 4,654
Loans, Excluding Purchased Credit Impaired Loans [Member] | Secured Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	2	2	5	5
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,422	$ 293	$ 1,778	$ 1,663
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,422	$ 293	$ 1,778	$ 1,663
Loans, Excluding Purchased Credit Impaired Loans [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	1	0	1	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 382	$ 0	$ 382	$ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 382	$ 0	$ 382	$ 0
Loans, Excluding Purchased Credit Impaired Loans [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	0	1	0	2
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 30	$ 0	$ 280
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 30	$ 0	$ 280
Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	8	14	18	18
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 815	$ 2,214	$ 2,361	$ 2,711
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 815	$ 2,214	$ 2,361	$ 2,711

Loans Loans (Analysis of Purcha

Loans Loans (Analysis of Purchased Credit Impaired Loans - Accretable Yield Rollforward) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017	Dec. 31, 2016	Mar. 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	$ 35,706	$ 52,909	$ 35,706	$ 52,909	$ 38,444	$ 45,191	$ 56,607	$ 58,981
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	2,882	3,774	7,064	8,003
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans	0	(149)	158	(1,910)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	$ 144	$ (73)	$ (2,263)	$ 21

Allowance for Loan and Lease 48

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for loan and lease losses	$ 3,177	$ 3,640	$ 5,952	$ 8,894

Allowance for Loan and Lease 49

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		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 71,021	$ 69,264	$ 70,043	$ 68,172
Charged-offs	(6,018)	(6,234)	(9,833)	(13,139)
Recoveries	4,804	2,634	6,822	5,377
Provision for loan and lease losses	3,177	3,640	5,952	8,894
Ending balance	72,984	69,304	72,984	69,304
Specific Reserve	3,499	2,705	3,499	2,705
General Allocation	69,485	66,599	69,485	66,599
Secured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	35,672	32,114	36,050	32,321
Charged-offs	(3,600)	(2,900)	(4,709)	(6,670)
Recoveries	2,903	728	3,200	1,339
Provision for loan and lease losses	4,564	1,866	4,998	4,818
Ending balance	39,539	31,808	39,539	31,808
Specific Reserve	3,425	2,486	3,425	2,486
General Allocation	36,114	29,322	36,114	29,322
Unsecured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,188	1,300	960	1,299
Charged-offs	0	(41)	(18)	(44)
Recoveries	41	25	109	76
Provision for loan and lease losses	(82)	(19)	96	(66)
Ending balance	1,147	1,265	1,147	1,265
Specific Reserve	0	0	0	0
General Allocation	1,147	1,265	1,147	1,265
One-to-Four Family Residential [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	645	654	599	916
Charged-offs	(153)	(35)	(460)	(35)
Recoveries	223	20	340	61
Provision for loan and lease losses	(87)	35	149	(268)
Ending balance	628	674	628	674
Specific Reserve	4	1	4	1
General Allocation	624	673	624	673
Commercial Land [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,288	1,262	1,797	1,178
Charged-offs	0	(26)	0	(26)
Recoveries	0	2	0	2
Provision for loan and lease losses	68	184	559	268
Ending balance	2,356	1,422	2,356	1,422
Specific Reserve	0	0	0	0
General Allocation	2,356	1,422	2,356	1,422
Income Property Multifamily [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,803	7,402	7,342	6,616
Charged-offs	0	0	0	0
Recoveries	60	120	95	181
Provision for loan and lease losses	(9)	524	(583)	1,249
Ending balance	6,854	8,046	6,854	8,046
Specific Reserve	25	100	25	100
General Allocation	6,829	7,946	6,829	7,946
Owner Occupied [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,534	6,086	6,439	5,550
Charged-offs	0	0	0	0
Recoveries	67	8	110	16
Provision for loan and lease losses	(89)	242	(37)	770
Ending balance	6,512	6,336	6,512	6,336
Specific Reserve	0	0	0	0
General Allocation	6,512	6,336	6,512	6,336
Land And Acquisition [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	509	640	316	339
Charged-offs	0	0	(14)	0
Recoveries	27	2	47	53
Provision for loan and lease losses	(175)	(55)	12	195
Ending balance	361	587	361	587
Specific Reserve	0	0	0	0
General Allocation	361	587	361	587
Residential Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,109	1,449	669	733
Charged-offs	0	0	0	0
Recoveries	31	3	40	206
Provision for loan and lease losses	237	(76)	668	437
Ending balance	1,377	1,376	1,377	1,376
Specific Reserve	0	0	0	0
General Allocation	1,377	1,376	1,377	1,376
Income Property Multifamily Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	782	715	404	388
Charged-offs	0	0	0	0
Recoveries	0	1	0	2
Provision for loan and lease losses	203	188	581	514
Ending balance	985	904	985	904
Specific Reserve	0	0	0	0
General Allocation	985	904	985	904
Owner Occupied Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,768	1,210	1,192	1,006
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	(386)	174	190	378
Ending balance	1,382	1,384	1,382	1,384
Specific Reserve	0	0	0	0
General Allocation	1,382	1,384	1,382	1,384
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,360	3,368	3,534	3,531
Charged-offs	(465)	(334)	(893)	(600)
Recoveries	248	201	533	366
Provision for loan and lease losses	408	325	377	263
Ending balance	3,551	3,560	3,551	3,560
Specific Reserve	45	118	45	118
General Allocation	3,506	3,442	3,506	3,442
Purchased Credit Impaired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	9,395	13,064	10,515	13,726
Charged-offs	(1,800)	(2,898)	(3,739)	(5,764)
Recoveries	1,204	1,524	2,348	3,075
Provision for loan and lease losses	(738)	91	(1,063)	744
Ending balance	8,061	11,781	8,061	11,781
Specific Reserve	0	0	0	0
General Allocation	8,061	11,781	8,061	11,781
Unallocated Financing Receivables [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	968	0	226	569
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	(737)	161	5	(408)
Ending balance	231	161	231	161
Specific Reserve	0	0	0	0
General Allocation	$ 231	$ 161	$ 231	$ 161

Allowance for Loan and Lease 50

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		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit
Beginning balance	$ 3,555	$ 2,930	$ 2,705	$ 2,930
Allowance for Loan and Lease Losses, Net Changes In Unfunded Commitments and Letters Of Credit Allowance	0	(150)	850	(150)
Ending balance	$ 3,555	$ 2,780	$ 3,555	$ 2,780

Allowance for Loan and Lease 51

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	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	$ 72,984	$ 71,021	$ 70,043	$ 69,304	$ 69,264	$ 68,172
Loans, net	6,350,090		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	6,293,221		6,067,763
Less: allowance for loan and lease losses	64,923		59,528
Loans, net	6,228,298		6,008,235
Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	139,302		157,251
Acquisition Accounting Valuation Discount on Purchased Credit Impaired Loans	9,449		11,591
Less: allowance for loan and lease losses	8,061		10,515
Loans, net	121,792		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	6,025,968		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	135,923		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	98,162		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	87		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	169,091		151,942
Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	3,292		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	39,539	35,672	36,050	31,808	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	2,604,364		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	15,836		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	2,423,195		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	14,930		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	74,148		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	87		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	107,021		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	819		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	1,147	1,188	960	1,265	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	95,419		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	772		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	93,716		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	703		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	701		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	1,002		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	69		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	628	645	599	674	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	171,054		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	17,242		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	168,062		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	16,379		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	1,204		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	1,788		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	863		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	2,356	2,288	1,797	1,422	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	283,520		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	10,411		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	274,000		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	10,411		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	4,761		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	0		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	4,759		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	6,854	6,803	7,342	8,046	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	1,355,767		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	26,185		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	1,328,708		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	26,047		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	8,678		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	18,381		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	6,512	6,534	6,439	6,336	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	1,130,767		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	51,802		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	1,098,775		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	50,999		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	8,269		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	23,723		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	803		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	361	509	316	587	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	6,049		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	453		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	6,022		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	382		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	27		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	71		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	1,377	1,109	669	1,376	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	133,167		109,629
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	132,555		108,941
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	399		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] | 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] | 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]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	985	782	404	904	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	153,529		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	786		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	153,529		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	786		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	1,382	1,768	1,192	1,384	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	39,466		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	288		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	35,416		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	288		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	3,551	$ 3,360	3,534	$ 3,560	$ 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	320,119		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	15,527		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	311,990		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	14,998		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	2		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	8,127		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	529		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		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Other Real Estate Owned [Line Items]
Balance, beginning of period	$ 4,519	$ 12,427	$ 5,998	$ 13,738
Transfers in	0	206	0	311
Valuation adjustments	(33)	(139)	(226)	(276)
Proceeds from Sale of OREO Property	444	1,950	1,719	3,276
Gain on sale of OREO, net	16	69	5	116
Total OREO, end of period	4,058	$ 10,613	4,058	$ 10,613
Mortgage Loans in Process of Foreclosure, Amount	537		537
One-to-Four Family Residential [Member]
Other Real Estate Owned [Line Items]
Total OREO, end of period	$ 0		$ 0

Covered Assets and FDIC Loss-53

Covered Assets and FDIC Loss-sharing Asset (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Payment to FDIC to terminate loss-sharing agreements	$ 4,700		$ (4,666)	$ 0
FDIC indemnification asset settlement	3,123	$ 0	3,123	0
FDIC clawback liability removal upon termination of loss-sharing agreements	5,400
FDIC loss-sharing agreement early termination, pretax charge	$ 2,400		$ 2,409	$ 0
Non-Single Family Covered Assets					$ 74,000
Single Family Covered Assets					$ 26,400

Covered Assets and FDIC Loss-54

Covered Assets and FDIC Loss-sharing Asset (FDIC Loss-sharing Asset) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at beginning of period	$ 3,239	$ 5,954	$ 3,535	$ 6,568
Cash paid to (received from) the FDIC, net	0	(396)	184	(43)
FDIC reimbursable losses, net	57	(302)	(149)	(166)
FDIC indemnification asset settlement	(3,123)	0	(3,123)	0
Amortization, net	(99)	(883)	(414)	(2,215)
Loan impairment (recapture)	0	(20)	40	127
Sale of other real estate	11	(24)	18	120
Valuation adjustments of other real estate owned	0	(40)	0	(22)
Other	85	23	91	103
Balance at end of period	$ 0	$ 4,266	$ 0	$ 4,266
Non-Single Family Covered Assets					$ 74,000
Single Family Covered Assets					$ 26,400

Goodwill and Intangible Asset55

Goodwill and Intangible Assets (Schedule of Goodwill and Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017	Dec. 31, 2016	Mar. 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	382,762	$ 382,762
CDI current period amortization	(1,249)	(1,483)	(2,598)	(3,066)
Indefinite-Lived Intangible Assets (Excluding Goodwill)	919	919	919	919
Other intangible assets, net	15,033	20,511	15,033	20,511		$ 17,631
Total goodwill and intangible assets, end of period	397,795	403,273	$ 397,795	403,273
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	$ 58,598	$ 58,598
Accumulated amortization at beginning of period					$ (43,235)	$ (41,886)	$ (37,523)	$ (35,940)
Core deposit intangible, net, beginning of period	15,363	21,075	$ 16,712	22,658
CDI current period amortization	(1,249)	(1,483)	(2,598)	(3,066)
Total core deposit intangible, end of period	$ 14,114	$ 19,592	$ 14,114	$ 19,592

Goodwill and Intangible Asset56

Goodwill and Intangible Assets (Estimated Future Amortization Expense of Core Deposit Intangibles) (Details) $ in Thousands	Jun. 30, 2017USD ($)
Future Amortization Expense For Core Deposit Intangibles
2,016	$ 2,315
2,017	3,855
2,018	2,951
2,019	2,048
2,020	$ 1,440

Derivatives and Balance Sheet57

Derivatives and Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Derivative [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ 2	$ 1	$ 6	$ (7)
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	65,895		65,895
Secured Borrowings, Gross, Difference, Amount	0		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	65,895		65,895
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	40,895		40,895
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		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		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		25,000
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	346,700		346,700		$ 309,300
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of asset derivative instruments	9,077		9,077		9,012
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of liability derivative instruments	$ 9,096		$ 9,096		$ 9,036

Derivatives and Balance Sheet58

Derivatives and Balance Sheet Offsetting Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	Jun. 30, 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	65,895	80,822
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	(65,895)	(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	9,077	9,012
Derivative, Collateral, Obligation to Return Securities	0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	9,077	9,012
Derivative Liability, Gross Amounts Offset in Balance Sheets	0	0
Derivative Liability	9,096	9,036
Derivative, Collateral, Right to Reclaim Securities	(9,096)	(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	65,895	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	9,077	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	$ 9,096	$ 9,036

Commitments and Contingent Li59

Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 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	679
Commitments to Extend Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	2,180,000	$ 2,170,000
Standby Letters of Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	49,600	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	Jul. 27, 2017	Apr. 27, 2017	Jan. 26, 2017
Subsequent Event [Line Items]
Declared quarterly cash dividend		$ 0.22	$ 0.22
Subsequent Event [Member]
Subsequent Event [Line Items]
Declared quarterly cash dividend	$ 0.22

Accumulated Other Comprehensi61

Accumulated Other Comprehensive Income (Changes in AOCI by Component) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	[1]	$ (12,606)	$ 12,343	$ (18,999)	$ (6,295)
Other comprehensive income before reclassifications	[1]	6,033	8,508	12,339	27,278
Amounts reclassified from accumulated other comprehensive income	[1]	45	(40)	132	(172)
Net current-period other comprehensive income	[1]	6,078	8,468	12,471	27,106
Ending balance	[1]	(6,528)	20,811	(6,528)	20,811
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	[1]	(11,002)	18,918	(12,704)	386
Other comprehensive income before reclassifications	[1]	6,033	8,508	7,735	27,278
Amounts reclassified from accumulated other comprehensive income	[1]	0	(146)	0	(384)
Net current-period other comprehensive income	[1]	6,033	8,362	7,735	26,894
Ending balance	[1]	(4,969)	27,280	(4,969)	27,280
Unrealized Gains and Losses on Pension Plan Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	[1]	(1,604)	(6,575)	(6,295)	(6,681)
Other comprehensive income before reclassifications	[1]	0	0	4,604	0
Amounts reclassified from accumulated other comprehensive income	[1]	45	106	132	212
Net current-period other comprehensive income	[1]	45	106	4,736	212
Ending balance	[1]	$ (1,559)	$ (6,469)	$ (1,559)	$ (6,469)
[1]	All amounts are net of tax. Amounts in parenthesis indicate debits.

Accumulated Other Comprehensi62

Accumulated Other Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains, net			$ 0	$ 602
Compensation and employee benefits	$ 38,393	$ 37,291	79,218	73,610
Total before tax	38,252	36,650	78,025	67,138
Income tax provision	(11,120)	(11,245)	(21,694)	(20,474)
Net income	27,132	25,405	56,331	46,664
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	229	0	602
Total before tax	0	229	0	602
Income tax provision	0	(83)	0	(218)
Net income	0	146	0	384
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	(71)	(167)	(207)	(334)
Total before tax	(71)	(167)	(207)	(334)
Income tax provision	26	61	75	122
Net income	$ (45)	$ (106)	$ (132)	$ (212)

Fair Value Accounting and Mea63

Fair Value Accounting and Measurement (Financial Assets And Liabilities Accounted for Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 2,264,636	$ 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	$ 2,264,636	2,278,577
Other assets (Interest rate contracts)	9,077	9,012
Other liabilities (Interest rate contracts)	9,096	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	250	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	2,264,386	2,277,777
Other assets (Interest rate contracts)	9,077	9,012
Other liabilities (Interest rate contracts)	9,096	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	1,423,958	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	1,423,958	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	483,093	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	483,093	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	352,238	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	352,238	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	250	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	250	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	5,097	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	5,097	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 Mea64

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		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 7,019	$ 3,218	$ 7,019	$ 3,218
Fair Value, Option, Changes in Fair Value, Gain (Loss)	3,702	2,829	3,702	2,924
OREO	105	6,338	105	6,338
Assets, Fair Value Disclosure	7,124	9,556	7,124	9,556
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0	0	0
OREO	0	0	0	0
Assets, Fair Value Disclosure	0	0	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0	0	0
OREO	0	0	0	0
Assets, Fair Value Disclosure	0	0	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	7,019	3,218	7,019	3,218
OREO	105	6,338	105	6,338
Assets, Fair Value Disclosure	7,124	9,556	7,124	9,556
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)	3,669	2,691	3,669	2,691
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)	$ 33	$ 138	$ 33	$ 233

Fair Value Accounting and Mea65

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
	Jun. 30, 2017	Jun. 30, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	$ 7,019	$ 3,218
OREO	105	6,338
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	7,019	3,218
OREO	105	6,338
Collateral Pledged [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	$ 7,019	303
Collateral Pledged [Member] | 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	0.00%
Collateral Pledged [Member] | 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	75.00%
Collateral Pledged [Member] | 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	60.59%
Uncollateralized [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans		$ 2,915
Uncollateralized [Member] | 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, Discount Rate		2.99%
Uncollateralized [Member] | 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, Discount Rate		10.25%
Uncollateralized [Member] | 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, Discount Rate		6.03%

Fair Value Accounting and Mea66

Fair Value Accounting and Measurement (Carrying Amounts and Estimated Fair Values of Selected Financial Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Assets
Interest-earning deposits with banks	$ 14,425	$ 31,200
Securities available for sale	2,264,636	2,278,577
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Assets
Cash and due from banks	197,623	193,038
Interest-earning deposits with banks	14,425	31,200
Securities available for sale	2,264,636	2,278,577
FHLB stock	16,360	10,240
Loans held for sale	6,918	5,846
Loans	6,350,090	6,143,380
FDIC loss-sharing asset		3,535
Interest rate contracts	9,077	9,012
Liabilities
Deposits	8,072,464	8,059,415
FHLB Advances	159,474	6,493
Repurchase agreements	65,895	80,822
Interest rate contracts	9,096	9,036
Estimate of Fair Value, Fair Value Disclosure [Member]
Assets
Cash and due from banks	197,623	193,038
Interest-earning deposits with banks	14,425	31,200
Securities available for sale	2,264,636	2,278,577
FHLB stock	16,360	10,240
Loans held for sale	6,918	5,846
Loans	6,233,490	6,040,439
FDIC loss-sharing asset		867
Interest rate contracts	9,077	9,012
Liabilities
Deposits	8,067,980	8,055,168
FHLB Advances	160,397	7,070
Repurchase agreements	66,102	81,131
Interest rate contracts	9,096	9,036
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets
Cash and due from banks	197,623	193,038
Interest-earning deposits with banks	14,425	31,200
Securities available for sale	250	800
FHLB stock	0	0
Loans held for sale	0	0
Loans	0	0
FDIC loss-sharing asset		0
Interest rate contracts	0	0
Liabilities
Deposits	7,687,671	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	2,264,386	2,277,777
FHLB stock	16,360	10,240
Loans held for sale	6,918	5,846
Loans	0	0
FDIC loss-sharing asset		0
Interest rate contracts	9,077	9,012
Liabilities
Deposits	380,309	402,046
FHLB Advances	160,397	7,070
Repurchase agreements	66,102	81,131
Interest rate contracts	9,096	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	6,233,490	6,040,439
FDIC loss-sharing asset		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		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 27,132	$ 25,405	$ 56,331	$ 46,664
Earnings allocated to participating securities - preferred shares	0	45	3	82
Earnings allocated to participating securities - nonvested restricted shares	362	343	759	578
Earnings allocated to common shareholders, Basic	$ 26,770	$ 25,017	$ 55,569	$ 46,004
Weighted average common shares outstanding	57,520	57,185	57,437	57,149
Basic earnings per common share	$ 0.47	$ 0.44	$ 0.97	$ 0.80
Earnings allocated to common shareholders, Diluted	$ 26,770	$ 25,017	$ 55,569	$ 46,004
Dilutive effect of equity awards and warrants	5	10	5	11
Weighted average diluted common shares outstanding	57,525	57,195	57,442	57,160
Diluted earnings per common share	$ 0.47	$ 0.44	$ 0.97	$ 0.80
Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive.	12	19	13	23

Subsequent event (Details)

Subsequent event (Details) - Subsequent Event [Member] - USD ($)	3 Months Ended
	Sep. 30, 2017	Jul. 01, 2017
Subsequent Event [Line Items]
Disposal Group, Including Discontinued Operation, Assets		$ 0
Disposal Group, Including Discontinued Operation, Assets		$ 0
Subsequent event, Merchant services sale, one time gain	$ 14,000,000