Columbia Banking System (COLB) 10-Q 5 May 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 30, 2016
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Entity Registrant Name	COLUMBIA BANKING SYSTEM INC
Entity Central Index Key	887,343
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		58,004,075

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) shares in Thousands, $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
ASSETS
Cash and due from banks		$ 150,683	$ 166,929
Interest-earning deposits with banks		38,248	8,373
Total cash and cash equivalents		188,931	175,302
Securities available for sale at fair value (amortized cost of $2,156,999 and $2,157,610, respectively)		2,186,166	2,157,694
Federal Home Loan Bank stock at cost		10,241	12,722
Loans held for sale		3,681	4,509
Loans, net of unearned income of ($39,410) and ($42,373), respectively		5,877,283	5,815,027
Less: allowance for loan and lease losses		69,264	68,172
Loans, net		5,808,019	5,746,855
FDIC loss-sharing asset		5,954	6,568
Interest receivable		29,304	27,877
Premises and equipment, net		158,101	164,239
Other real estate owned		12,427	13,738
Goodwill		382,762	382,762
Other intangible assets, net		21,994	23,577
Other assets		228,352	235,854
Total assets		9,035,932	8,951,697
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing		3,553,468	3,507,358
Interest-bearing		4,043,481	3,931,471
Total deposits		7,596,949	7,438,829
Federal Home Loan Bank advances		6,521	68,531
Securities sold under agreements to repurchase		73,839	99,699
Other liabilities		97,835	102,510
Total liabilities		$ 7,775,144	$ 7,709,569
Commitments and contingent liabilities (Note 10)
Shareholders' equity:
Preferred Stock, Shares Authorized		2,000	2,000
Preferred Stock, Shares Issued		9	9
Preferred Stock, Value, Issued		$ 2,217	$ 2,217
Authorized shares		115,000	115,000
Common Stock Shares Issued And Outstanding		58,008	57,724
Common Stock (no par value)		$ 991,026	$ 990,281
Retained earnings		255,202	255,925
Accumulated other comprehensive income (loss)	[1]	12,343	(6,295)
Total shareholders’ equity		1,260,788	1,242,128
Total liabilities and shareholders’ equity		$ 9,035,932	$ 8,951,697
[1]	All amounts are net of tax. Amounts in parenthesis indicate debits.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Securities available-for-sale, amortized cost	$ 2,156,999	$ 2,157,610
Less: unearned income on loans	$ (39,410)	$ (42,373)
Common stock, par value	$ 0	$ 0
Authorized shares	115,000	115,000
Common stock, shares outstanding	58,008	57,724

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Interest Income
Loans		$ 70,316	$ 70,822
Taxable securities		8,017	7,526
Tax-exempt securities		2,803	3,042
Deposits in banks		38	27
Total interest income		81,174	81,417
Interest Expense
Deposits		742	748
Federal Home Loan Bank advances		124	159
Other borrowings		138	146
Total interest expense		1,004	1,053
Net Interest Income		80,170	80,364
Provision for loan and lease losses		5,254	1,209
Net interest income after provision for loan and lease losses		74,916	79,155
Noninterest Income
Deposit account and treasury management fees (1)	[1]	6,989	6,860
Card revenue	[1]	5,652	5,363
Financial services and trust revenue	[1]	2,821	3,124
Loan revenue	[1]	2,262	2,603
Merchant processing revenue		2,102	2,040
Bank Owned Life Insurance Income		1,116	1,078
Investment securities gains, net		373	721
Change in FDIC loss-sharing asset		(1,103)	150
Other (1)	[1]	434	828
Total noninterest income		20,646	22,767
Noninterest Expense
Compensation and employee benefits		36,319	39,100
Occupancy		10,173	7,993
Merchant processing expense		1,033	977
Advertising and promotion		842	931
Data processing		4,146	4,984
Legal and professional fees		1,325	2,507
Taxes, licenses and fees		1,290	1,232
Regulatory premiums		1,141	1,221
Net cost (benefit) of operation of other real estate owned		104	(1,246)
Amortization of intangibles		1,583	1,817
Other		7,118	7,218
Total noninterest expense		65,074	66,734
Income before income taxes		30,488	35,188
Income tax provision		9,229	10,827
Net Income		$ 21,259	$ 24,361
Earnings per common share
Basic ($ per share)		$ 0.37	$ 0.42
Diluted ($ per share)		0.37	0.42
Dividends paid per common share		$ 0.38	$ 0.30
Weighted average number of common shares outstanding		57,114	56,965
Weighted average number of diluted common shares outstanding		57,125	56,978
[1]	Reclassified to conform to the current period’s presentation. Reclassifications consisted of disaggregating fee revenue previously presented in ‘Service charges and other fees’ and certain revenue previously presented in ‘Other’ into the presentation above. The Company made these reclassifications to provide additional information about its sources of noninterest income. There was no change to total noninterest income as previously reported as a result of these reclassifications.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Net income		$ 21,259	$ 24,361
Unrealized gain from securities:
Net unrealized holding loss from available for sale securities arising during the period		18,770	9,376
Reclassification adjustment of net gain from sale of available for sale securities included in income		(238)	(459)
Net unrealized gain from securities, net of reclassification adjustment		18,532	8,917
Pension plan liability adjustment:
Unrecognized net actuarial gain (loss) during the period		0	(280)
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost		106	28
Pension plan liability adjustment, net		106	(252)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	[1]	18,638	8,665
Total comprehensive income		$ 39,897	$ 33,026
[1]	All amounts are net of tax. Amounts in parenthesis indicate debits.

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax	$ 10,686	$ 5,338
Reclassification adjustment of net gain from sale of available for sale securities included in income, tax	135	262
Net unrealized loss from unfunded defined benefit plan liability arising during the period, tax	0	159
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax	$ (61)	$ (16)

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, 2014	$ 1,228,175	$ 985,839	$ 234,498	$ 5,621	$ 2,217
Balance, shares at Dec. 31, 2014		57,437,000			8,782
Net income	24,361		24,361
Other comprehensive income	8,665			8,665
Issuance of common stock - stock option and other plans, value		$ 428
Issuance of common stock - stock option and other plans, shares		17,000
Issuance of common stock - restricted stock awards, net of cancelled awards, value		$ 862
Issuance of common stock - restricted stock awards, net of cancelled awards, shares		273,000
Stock Repurchased and Retired During Period, Value		$ (781)
Stock Repurchased During Period, Shares		(28,000)
Dividends, Preferred Stock, Cash			(31)
Cash dividends paid on common stock	(17,236)		(17,236)
Balance, value at Mar. 31, 2015	1,244,443	$ 986,348	241,592	14,286	$ 2,217
Balance, shares at Mar. 31, 2015		57,699,000			8,782
Stock Issued During Period, Shares, New Issues					0
Stock Issued During Period, Value, New Issues					$ 0
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			8,782
Net income	21,259		21,259
Other comprehensive income	18,638			18,638
Issuance of common stock - stock option and other plans, value	598	$ 598
Issuance of common stock - stock option and other plans, shares		20,000
Issuance of common stock - restricted stock awards, net of cancelled awards, value	1,180	$ 1,180
Issuance of common stock - restricted stock awards, net of cancelled awards, shares		299,000
Stock Repurchased and Retired During Period, Value	(1,033)	$ (1,033)
Stock Repurchased During Period, Shares		(35,000)
Dividends, Preferred Stock, Cash	(39)		39
Cash dividends paid on common stock	(21,943)		(21,943)
Balance, value at Mar. 31, 2016	$ 1,260,788	$ 991,026	$ 255,202	$ 12,343	$ 2,217
Balance, shares at Mar. 31, 2016		58,008,000			8,782

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Cash Flows From Operating Activities
Net income		$ 21,259,000	$ 24,361,000
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan and lease losses		5,254,000	1,209,000
Stock-based compensation expense		1,180,000	862,000
Depreciation, amortization and accretion		10,798,000	7,735,000
Investment securities gain, net		373,000	721,000
Net realized (gain) loss on sale of other assets		106,000	(306,000)
Net gain on sale and valuation adjustments of OREO	[1]	(90,000)	1,539,000
Payments for Origination and Purchases of Loans Held-for-sale	[1]	(19,174,000)	(14,890,000)
Proceeds from Sale of Loans Held-for-sale	[1]	20,002,000	12,461,000
Net change in:
Interest receivable		(1,427,000)	(1,286,000)
Interest payable		(55,000)	(79,000)
Other assets		(3,731,000)	(4,531,000)
Other liabilities		(4,619,000)	3,680,000
Net cash provided by operating activities		29,310,000	26,956,000
Cash Flows From Investing Activities
Loans originated and acquired, net of principal collected		(64,056,000)	(12,443,000)
Purchases of securities available for sale		(95,686,000)	(11,362,000)
Purchases of premises and equipment		(445,000)	(4,032,000)
Payments to Acquire Federal Home Loan Bank Stock		(10,520,000)	0
Proceeds from FDIC for reimbursement on loss-sharing asset		258,000	1,138,000
Proceeds from sales of securities available for sale		38,876,000	57,243,000
Proceeds from principal repayments and maturities of securities available for sale		52,422,000	54,451,000
Proceeds from Sales of Assets, Investing Activities		1,911,000	7,384,000
Proceeds from Sale of Federal Home Loan Bank Stock	[1]	13,001,000	361,000
Proceeds from sales of other real estate and other personal property owned	[1]	1,326,000	5,067,000
Payments to FDIC related to loss-sharing asset		(611,000)	(479,000)
Net cash provided by (used in) investing activities		(63,524,000)	97,328,000
Cash Flows From Financing Activities
Net increase in deposits		158,120,000	150,243,000
Net decrease in sweep repurchase agreements		(25,860,000)	(8,228,000)
Proceeds from Federal Home Loan Bank advances		165,000,000	624,000,000
Proceeds from exercise of stock options		598,000	428,000
Repayment of Federal Home Loan Bank advances		(227,000,000)	(804,000,000)
Payment of common stock dividends		(21,943,000)	(17,236,000)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock		(39,000)	(31,000)
Repayments of Subordinated Debt		0	8,248,000
Purchase and retirement of common stock		1,033,000	781,000
Net cash provided by (used in) financing activities		47,843,000	(63,853,000)
Increase in cash and cash equivalents		13,629,000	60,431,000
Cash and cash equivalents at beginning of period		175,302,000	188,170,000
Cash and cash equivalents at end of period		188,931,000	248,601,000
Supplemental Information:
Cash paid for interest		1,059,000	1,132,000
Cash paid for income tax		6,350,000	13,000
Non-cash investing and financing activities
Loans transferred to other real estate owned		$ 105,000	$ 4,692,000
[1]	Reclassified to conform to the current period’s presentation. There were no changes to cash flows from operating, investing, or financing activities as a result of these reclassifications.

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	3 Months Ended
	Mar. 31, 2016
Basis of Presentation And Significant Accounting Policies
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies Basis of Presentation The interim unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with instructions to Form 10-Q and Article 10 of Regulation S-X. The consolidated financial statements include the accounts of Columbia Banking System, Inc. (“we”, “our”, “Columbia” or the “Company”) and its subsidiaries, including its wholly owned banking subsidiary Columbia State Bank (“Columbia Bank” or the “Bank”) and Columbia Trust Company (“Columbia Trust”). All intercompany transactions and accounts have been eliminated in consolidation. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair statement of the results for the interim periods presented have been included. The results of operations for the three months ended March 31, 2016 are not necessarily indicative of results to be anticipated for the year ending December 31, 2016 . The accompanying interim unaudited consolidated financial statements should be read in conjunction with the financial statements and related notes contained in the Company’s 2015 Annual Report on Form 10-K. Because of reclassifications, changes occurred in the manner in which certain comparative period noninterest income items were presented in the unaudited consolidated statements of income. Specifically, fee revenue previously presented as ‘Service charges and other fees’ and certain fee revenue previously presented as ‘Other’ were reclassified to conform to the current period presentation. The Company made these presentation changes to provide additional information about its sources of noninterest income. There was no change to total noninterest income as previously reported as a result of these reclassifications. Significant Accounting Policies The significant accounting policies used in preparation of our consolidated financial statements are disclosed in our 2015 Annual Report on Form 10-K. There have not been any changes in our significant accounting policies compared to those contained in our 2015 Form 10-K disclosure for the year ended December 31, 2015 .

Accounting Pronouncements Recen

Accounting Pronouncements Recently Issued	3 Months Ended
	Mar. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Accounting Pronouncements Recently Issued	Accounting Pronouncements Recently Issued In March 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“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 amendments in ASU 2016-09 are effective for the first interim or annual period beginning after December 15, 2016. Early adoption is permitted. The Company is assessing the impact that this guidance will have on its consolidated financial statements as well as whether to early adopt this ASU. 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 and corresponding right-of-use assets for all leases with lease terms greater than 12 months. 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. The Company is assessing the impact that this guidance will have on its consolidated financial statements. In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities . The amendments in ASU 2016-01 require all equity investments to be measured at fair value with changes in the fair value recognized through net income. The amendments in ASU 2016-01 also require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. In addition, the amendments in this Update eliminate the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet for public business entities. The amendments in ASU 2016-01 are effective for the first interim or annual period beginning after December 15, 2017. The Company is assessing the impact that this guidance will have on its consolidated financial statements but does not expect the impact to be material. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers . The guidance in this update supersedes the revenue recognition requirements in ASC Topic 605, Revenue Recognition, and most industry-specific guidance throughout the industry topics of the codification. 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. In March 2016, the FASB issued ASU 2016-08 and ASU 2016-10 to provide implementation guidance for ASU 2014-09. The Company is assessing the impact that this guidance will have on its consolidated financial statements but does not expect the impact to be material.

Securities

Securities	3 Months Ended
	Mar. 31, 2016
Available-for-sale Securities [Abstract]
Securities	e following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of securities available for sale: Amortized Gross Gross Fair Value (in thousands) March 31, 2016 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 1,319,714 $ 14,247 $ (3,861 ) $ 1,330,100 State and municipal securities 477,544 14,257 (414 ) 491,387 U.S. government agency and government-sponsored enterprise securities 353,910 5,031 — 358,941 U.S. government securities 547 — — 547 Other securities 5,284 53 (146 ) 5,191 Total $ 2,156,999 $ 33,588 $ (4,421 ) $ 2,186,166 December 31, 2015 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 1,296,955 $ 4,525 $ (14,991 ) $ 1,286,489 State and municipal securities 480,417 12,690 (938 ) 492,169 U.S. government agency and government-sponsored enterprise securities 354,515 1,113 (1,846 ) 353,782 U.S. government securities 20,439 — (302 ) 20,137 Other securities 5,284 24 (191 ) 5,117 Total $ 2,157,610 $ 18,352 $ (18,268 ) $ 2,157,694 Proceeds from sales of securities available for sale were $38.9 million and $57.2 million for the three months ended March 31, 2016 and 2015 , respectively. The following table provides the gross realized gains and losses on the sales of securities for the periods indicated: Three Months Ended March 31, 2016 2015 (in thousands) Gross realized gains $ 373 $ 730 Gross realized losses — (9 ) Net realized gains $ 373 $ 721 The scheduled contractual maturities of investment securities available for sale at March 31, 2016 are presented as follows: March 31, 2016 Amortized Cost Fair Value (in thousands) Due within one year $ 39,056 $ 39,243 Due after one year through five years 435,423 440,733 Due after five years through ten years 711,190 723,977 Due after ten years 966,046 977,022 Other securities with no stated maturity 5,284 5,191 Total investment securities available-for-sale $ 2,156,999 $ 2,186,166 The following table summarizes the carrying value of securities pledged as collateral to secure public deposits, borrowings and other purposes as permitted or required by law: March 31, 2016 (in thousands) Washington and Oregon State to secure public deposits $ 339,424 Federal Reserve Bank to secure borrowings 48,879 Other securities pledged 156,551 Total securities pledged as collateral $ 544,854 The following table shows the gross unrealized losses and fair value of the Company’s investments with unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at March 31, 2016 and December 31, 2015 : Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized (in thousands) March 31, 2016 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 95,313 $ (533 ) $ 190,975 $ (3,328 ) $ 286,288 $ (3,861 ) State and municipal securities 25,702 (125 ) 19,010 (289 ) 44,712 (414 ) U.S. government agency and government-sponsored enterprise securities 4,063 — 500 — 4,563 — Other securities — — 2,810 (146 ) 2,810 (146 ) Total $ 125,078 $ (658 ) $ 213,295 $ (3,763 ) $ 338,373 $ (4,421 ) December 31, 2015 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 664,509 $ (7,610 ) $ 214,325 $ (7,381 ) $ 878,834 $ (14,991 ) State and municipal securities 48,261 (358 ) 31,383 (580 ) 79,644 (938 ) U.S. government agency and government-sponsored enterprise securities 193,400 (1,128 ) 40,034 (718 ) 233,434 (1,846 ) U.S. government securities 10,343 (136 ) 9,794 (166 ) 20,137 (302 ) Other securities 2,300 (15 ) 2,780 (176 ) 5,080 (191 ) Total $ 918,813 $ (9,247 ) $ 298,316 $ (9,021 ) $ 1,217,129 $ (18,268 ) At March 31, 2016 , there were 74 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations securities in an unrealized loss position, of which 45 were in a continuous loss position for 12 months or more. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider these investments to be other-than-temporarily impaired at March 31, 2016 . At March 31, 2016 , there were 40 state and municipal government securities in an unrealized loss position, of which 20 were in a continuous loss position for 12 months or more. The unrealized losses on state and municipal securities were caused by interest rate changes or widening of market spreads subsequent to the purchase of the individual securities. Management monitors published credit ratings of these securities for adverse changes. As of March 31, 2016 , none of the rated obligations of state and local government entities held by the Company had a below investment grade credit rating. Because the credit quality of these securities are investment grade and the Company does not intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider these investments to be other-than-temporarily impaired at March 31, 2016 . At March 31, 2016 , there were two U.S. government agency and government-sponsored enterprise securities in an unrealized loss position, of which one was in a continuous loss position for 12 months or more. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not currently intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider these investments to be other-than-temporarily impaired at March 31, 2016 . At March 31, 2016 , there was one other security in an unrealized loss position, which 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 this investment to be other-than-temporarily impaired at March 31, 2016 as it has the intent and ability to hold the investment for sufficient time to allow for recovery in the market value.

Loans

Loans	3 Months Ended
	Mar. 31, 2016
Loans Receivable, Net [Abstract]
Loans	e Company’s loan portfolio includes originated and purchased loans. Originated loans and purchased loans for which there was no evidence of credit deterioration at their acquisition date and it was probable that we would be able to collect all contractually required payments are referred to collectively as loans, excluding purchased credit impaired loans. Purchased loans for which there was, at acquisition date, evidence of credit deterioration since their origination and it was probable that we would be unable to collect all contractually required payments are referred to as purchased credit impaired loans, or “PCI loans.” The following is an analysis of the loan portfolio by segment (net of unearned income): March 31, 2016 December 31, 2015 Loans, excluding PCI loans PCI Loans Total Loans, excluding PCI loans PCI Loans Total (in thousands) Commercial business $ 2,401,193 $ 34,474 $ 2,435,667 $ 2,362,575 $ 34,848 $ 2,397,423 Real estate: One-to-four family residential 175,050 22,720 197,770 176,295 23,938 200,233 Commercial and multifamily residential 2,520,352 93,979 2,614,331 2,491,736 99,389 2,591,125 Total real estate 2,695,402 116,699 2,812,101 2,668,031 123,327 2,791,358 Real estate construction: One-to-four family residential 133,447 2,163 135,610 135,874 2,278 138,152 Commercial and multifamily residential 183,548 1,618 185,166 167,413 1,630 169,043 Total real estate construction 316,995 3,781 320,776 303,287 3,908 307,195 Consumer 329,902 18,247 348,149 342,601 18,823 361,424 Less: Net unearned income (39,410 ) — (39,410 ) (42,373 ) — (42,373 ) Total loans, net of unearned income 5,704,082 173,201 5,877,283 5,634,121 180,906 5,815,027 Less: Allowance for loan and lease losses (56,200 ) (13,064 ) (69,264 ) (54,446 ) (13,726 ) (68,172 ) Total loans, net $ 5,647,882 $ 160,137 $ 5,808,019 $ 5,579,675 $ 167,180 $ 5,746,855 Loans held for sale $ 3,681 $ — $ 3,681 $ 4,509 $ — $ 4,509 At March 31, 2016 and December 31, 2015 , 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 $9.9 million at March 31, 2016 and $10.0 million at December 31, 2015 . During the first three months of 2016 , there were $55 thousand in advances and $96 thousand in repayments. At March 31, 2016 and December 31, 2015 , $2.21 billion and $2.22 billion of commercial and residential real estate loans were pledged as collateral on Federal Home Loan Bank of Des Moines (“FHLB”) borrowings and additional borrowing capacity. The Company has also pledged $50.2 million and $50.1 million of commercial loans to the Federal Reserve Bank for additional borrowing capacity at March 31, 2016 and December 31, 2015 , respectively. The following is an analysis of nonaccrual loans as of March 31, 2016 and December 31, 2015 : March 31, 2016 December 31, 2015 Recorded Unpaid Principal Recorded Unpaid Principal (in thousands) Commercial business: Secured $ 22,452 $ 31,039 $ 9,395 $ 15,688 Unsecured 107 331 42 256 Real estate: One-to-four family residential 730 1,702 820 1,866 Commercial & multifamily residential: Commercial land 238 247 349 332 Income property 2,897 3,185 2,843 3,124 Owner occupied 4,982 7,473 6,321 8,943 Real estate construction: One-to-four family residential: Land and acquisition 205 231 362 385 Residential construction 563 563 566 679 Consumer 4,717 4,985 766 990 Total $ 36,891 $ 49,756 $ 21,464 $ 32,263 Loans, excluding purchased credit impaired loans The following is an aging of the recorded investment of the loan portfolio as of March 31, 2016 and December 31, 2015 : Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans March 31, 2016 (in thousands) Commercial business: Secured $ 2,277,121 $ 4,148 $ 311 $ — $ 4,459 $ 22,452 $ 2,304,032 Unsecured 91,785 684 — — 684 107 92,576 Real estate: One-to-four family residential 170,846 686 62 — 748 730 172,324 Commercial & multifamily residential: Commercial land 218,925 — — — — 238 219,163 Income property 1,321,566 — — — — 2,897 1,324,463 Owner occupied 946,635 4,577 — — 4,577 4,982 956,194 Real estate construction: One-to-four family residential: Land and acquisition 12,915 — — — — 205 13,120 Residential construction 119,125 — — — — 563 119,688 Commercial & multifamily residential: Income property 86,584 — — — — — 86,584 Owner occupied 94,743 — — — — — 94,743 Consumer 314,197 1,541 740 — 2,281 4,717 321,195 Total $ 5,654,442 $ 11,636 $ 1,113 $ — $ 12,749 $ 36,891 $ 5,704,082 Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans December 31, 2015 (in thousands) Commercial business: Secured $ 2,241,069 $ 11,611 $ 617 $ — $ 12,228 $ 9,395 $ 2,262,692 Unsecured 94,867 39 — — 39 42 94,948 Real estate: One-to-four family residential 170,913 1,637 66 — 1,703 820 173,436 Commercial & multifamily residential: Commercial land 212,740 69 — — 69 349 213,158 Income property 1,305,502 1,750 684 — 2,434 2,843 1,310,779 Owner occupied 939,396 599 — — 599 6,321 946,316 Real estate construction: One-to-four family residential: Land and acquisition 14,388 — — — — 362 14,750 Residential construction 119,809 — — — — 566 120,375 Commercial & multifamily residential: Income property 83,634 — — — — — 83,634 Owner occupied 81,671 — — — — — 81,671 Consumer 328,219 2,597 780 — 3,377 766 332,362 Total $ 5,592,208 $ 18,302 $ 2,147 $ — $ 20,449 $ 21,464 $ 5,634,121 The following is an analysis of impaired loans as of March 31, 2016 and December 31, 2015 : Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid March 31, 2016 (in thousands) Commercial business: Secured $ 2,285,351 $ 18,681 $ 11,861 $ 11,996 $ 2,500 $ 6,820 $ 12,314 Unsecured 92,576 — — — — — — Real estate: One-to-four family residential 171,660 664 — — — 664 1,093 Commercial & multifamily residential: Commercial land 219,163 — — — — — — Income property 1,322,410 2,053 — — — 2,053 2,257 Owner occupied 951,216 4,978 — — — 4,978 7,390 Real estate construction: One-to-four family residential: Land and acquisition 12,810 310 — — — 310 334 Residential construction 119,126 562 — — — 562 562 Commercial & multifamily residential: Income property 86,584 — — — — — — Owner occupied 94,743 — — — — — — Consumer 319,628 1,567 15 15 15 1,552 1,634 Total $ 5,675,267 $ 28,815 $ 11,876 $ 12,011 $ 2,515 $ 16,939 $ 25,584 Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid December 31, 2015 (in thousands) Commercial business: Secured $ 2,257,168 $ 5,524 $ 690 $ 718 $ 321 $ 4,834 $ 6,455 Unsecured 94,948 — — — — — — Real estate: One-to-four family residential 172,150 1,286 314 339 314 972 1,397 Commercial & multifamily residential: Commercial land 213,158 — — — — — — Income property 1,308,673 2,106 — — — 2,106 2,311 Owner occupied 940,261 6,055 — — — 6,055 8,528 Real estate construction: One-to-four family residential: Land and acquisition 14,283 467 — — — 467 490 Residential construction 119,813 562 335 335 3 227 227 Commercial & multifamily residential: Income property 83,634 — — — — — — Owner occupied 81,671 — — — — — — Consumer 332,282 80 15 15 15 65 139 Total $ 5,618,041 $ 16,080 $ 1,354 $ 1,407 $ 653 $ 14,726 $ 19,547 The following table provides additional information on impaired loans for the three month periods indicated: Three Months Ended March 31, 2016 2015 Average Recorded Interest Recognized Average Recorded Interest Recognized (in thousands) Commercial business: Secured $ 12,103 $ 17 $ 10,698 $ 7 Unsecured — — 1 — Real estate: One-to-four family residential 975 6 3,162 13 Commercial & multifamily residential: Commercial land — — 235 — Income property 2,080 3 4,168 10 Owner occupied 5,516 7 7,938 234 Real estate construction: One-to-four family residential: Land and acquisition 388 1 544 1 Residential construction 562 — 446 — Consumer 824 2 404 2 Total $ 22,448 $ 36 $ 27,596 $ 267 The following is an analysis of loans classified as troubled debt restructurings (“TDR”) during the three months ended March 31, 2016 and 2015 : Three months ended March 31, 2016 Three months ended March 31, 2015 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial business: Secured 3 $ 1,370 $ 1,370 — $ — $ — Commercial and multifamily residential: Owner occupied 1 250 250 — — — Consumer 4 497 497 — — — Total 8 $ 2,117 $ 2,117 — $ — $ — The Company’s loans classified as TDR are loans that have been modified or the borrower has been granted special concessions due to financial difficulties that, if not for the challenges of the borrower, the Company would not otherwise consider. The TDR modifications or concessions are made to increase the likelihood that these borrowers with financial difficulties will be able to satisfy their debt obligations as amended. The concessions granted in the restructurings summarized in the table above largely consisted of maturity extensions, interest rate modifications or a combination of both. In limited circumstances, a reduction in the principal balance of the loan could also be made as a concession. Credit losses for loans classified as TDR are measured on the same basis as impaired loans. For impaired loans, an allowance is established when the collateral value less selling costs (or discounted cash flows or observable market price) of the impaired loan is lower than the recorded investment of that loan. The Company had commitments to lend $7 thousand of additional funds on loans classified as TDR as of March 31, 2016 . The Company had no such commitments at December 31, 2015 . The Company did not have any loans modified as TDR that defaulted within twelve months of being modified as TDR during the three month periods ended March 31, 2016 and 2015 . 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. The transition matrix is a matrix of probability values that specifies the probability of a loan pool transitioning into a particular delinquency state (e.g. 0-30 days past due, 31 to 60 days, etc.) given its delinquency state at the remeasurement date. Loss severity factors are based upon either actual charge-off data within the loan pools or industry averages and recovery lags are based upon the collateral within the loan pools. The excess of cash flows expected to be collected over the initial fair value of purchased credit impaired loans is referred to as the accretable yield and is accreted into interest income over the estimated life of the acquired loans using the effective yield method. Other adjustments to the accretable yield include changes in the estimated remaining life of the acquired loans, changes in expected cash flows and changes of indices for acquired loans with variable interest rates. The following is an analysis of our PCI loans, net of related allowance for losses and remaining valuation discounts as of March 31, 2016 and December 31, 2015 : March 31, 2016 December 31, 2015 (in thousands) Commercial business $ 38,209 $ 38,784 Real estate: One-to-four family residential 25,766 27,195 Commercial and multifamily residential 100,384 106,308 Total real estate 126,150 133,503 Real estate construction: One-to-four family residential 2,200 2,326 Commercial and multifamily residential 1,809 1,834 Total real estate construction 4,009 4,160 Consumer 20,226 20,903 Subtotal of PCI loans 188,594 197,350 Less: Valuation discount resulting from acquisition accounting 15,393 16,444 Allowance for loan losses 13,064 13,726 PCI loans, net of allowance for loan losses $ 160,137 $ 167,180 The following table shows the changes in accretable yield for PCI loans for the three months ended March 31, 2016 and 2015 : Three Months Ended March 31, 2016 2015 (in thousands) Balance at beginning of period $ 58,981 $ 73,849 Accretion (4,229 ) (6,319 ) Disposals 94 (1,093 ) Reclassifications from nonaccretable difference 1,761 2,289 Balance at end of period $ 56,607 $ 68,726

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit	3 Months Ended
	Mar. 31, 2016
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	lowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit Loans, excluding PCI loans We maintain an allowance for loan and lease losses (“ALLL”) to absorb losses inherent in the loan portfolio. The size of the ALLL is determined through quarterly assessments of the probable estimated losses in the loan portfolio. Our methodology for making such assessments and determining the adequacy of the ALLL includes the following key elements: 1. General valuation allowance consistent with the Contingencies topic of the FASB ASC. 2. Classified loss reserves on specific relationships. Specific allowances for identified problem loans are determined in accordance with the Receivables topic of the FASB ASC. 3. The unallocated allowance provides for other factors inherent in our loan portfolio that may not have been contemplated in the general and specific components of the allowance. This unallocated amount generally comprises less than 5% of the allowance. The unallocated amount is reviewed quarterly based on trends in credit losses, the results of credit reviews and overall economic trends. The general valuation allowance is calculated quarterly using quantitative and qualitative information about specific loan classes. The minimum required level with respect to which an entity develops a methodology to determine its ALLL is by general categories of loans, such as commercial business, real estate, and consumer. However, the Company’s methodology in determining its ALLL is prepared in a more detailed manner at the loan class level, utilizing specific categories such as commercial business secured, commercial business unsecured, real estate commercial land, and real estate income property multifamily. The quantitative information uses historical losses from a specific loan class and incorporates the loan’s risk rating migration from origination to the point of loss based upon the consideration of an appropriate look back period. A loan’s risk rating is primarily determined based upon the borrower’s ability to fulfill its debt obligation from a cash flow perspective. In the event there is financial deterioration of the borrower, the borrower’s other sources of income or repayment are also considered, including recent appraisal values for collateral dependent loans. The qualitative information takes into account general economic and business conditions affecting our marketplace, seasoning of the loan portfolio, duration of the business cycle, etc. to ensure our methodologies reflect the current economic environment and other factors as using historical loss information exclusively may not give an accurate estimate of inherent losses within the Company’s loan portfolio. When a loan is deemed to be impaired, the Company has to determine if a specific valuation allowance is required for that loan. The specific valuation allowance is a reserve, calculated at the individual loan level, for each loan determined to be both impaired and containing a value less than its recorded investment. The Company measures the impairment based on the discounted expected future cash flows, observable market price, or the fair value of the collateral less selling costs if the loan is collateral dependent or if foreclosure is probable. The specific reserve for each loan is equal to the difference between the recorded investment in the loan and its determined impairment value. The ALLL is increased by provisions for loan and lease losses (“provision”) charged to expense, and is reduced by loans charged off, net of recoveries or a recovery of previous provisions. While the Company’s management believes the best information available is used to determine the ALLL, changes in market conditions could result in adjustments to the ALLL, affecting net income, if circumstances differ from the assumptions used in determining the ALLL. We have used the same methodology for ALLL calculations during the three months ended March 31, 2016 and 2015 . Adjustments to the percentages of the ALLL allocated to loan categories are made based on trends with respect to delinquencies and problem loans within each class of loans. The Company reviews the ALLL quantitative and qualitative methodology on a quarterly basis and makes adjustments when appropriate. The Company continues to make revisions to its ALLL as necessary to maintain adequate reserves. The Company carefully monitors the loan portfolio and continues to emphasize the importance of credit quality. Once it is determined that all or a portion of a loan balance is uncollectable, and the amount can be reasonably estimated, the uncollectable portion of the loan is charged-off. PCI Loans Purchased credit impaired loans that have common risk characteristics are aggregated into loan pools. When required, we record impairment, at the pool-level, to adjust the pool’s carrying value to its net present value of expected future cash flows. Quarterly, we re-measure expected loan pool cash flows. If, due to credit deterioration, the present value of expected cash flows is less than carrying value, we reduce the loan pool’s carrying value by adjusting the ALLL with an impairment charge to earnings which is recorded as provision for loan losses. If credit quality improves and the present value of expected cash flows exceeds carrying value, we increase the loan pool’s carrying value by recapturing previously recorded ALLL, if any. See Note 4, Loans, for further discussion of the accounting for PCI loans. Credit losses attributable to draws on purchased credit impaired loans, advanced subsequent to the loan purchase date, are accounted for under ASC 450-20 and those amounts are also subject to the Company’s internal and external credit review. An ALLL is estimated in a similar manner as loans, excluding PCI loans, and a provision for loan losses is charged to earnings as necessary. The following tables show a detailed analysis of the ALLL for the three months ended March 31, 2016 and 2015 : Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General Three months ended March 31, 2016 (in thousands) Commercial business: Secured $ 32,321 $ (3,770 ) $ 611 $ 2,952 $ 32,114 $ 2,500 $ 29,614 Unsecured 1,299 (3 ) 51 (47 ) 1,300 — 1,300 Real estate: One-to-four family residential 916 — 41 (303 ) 654 — 654 Commercial & multifamily residential: Commercial land 1,178 — — 84 1,262 — 1,262 Income property 6,616 — 61 725 7,402 — 7,402 Owner occupied 5,550 — 8 528 6,086 — 6,086 Real estate construction: One-to-four family residential: Land and acquisition 339 — 51 250 640 — 640 Residential construction 733 — 203 513 1,449 — 1,449 Commercial & multifamily residential: Income property 388 — 1 326 715 — 715 Owner occupied 1,006 — — 204 1,210 — 1,210 Consumer 3,531 (266 ) 165 (62 ) 3,368 15 3,353 Purchased credit impaired 13,726 (2,866 ) 1,551 653 13,064 — 13,064 Unallocated 569 — — (569 ) — — — Total $ 68,172 $ (6,905 ) $ 2,743 $ 5,254 $ 69,264 $ 2,515 $ 66,749 Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General Three months ended March 31, 2015 (in thousands) Commercial business: Secured $ 25,923 $ (1,386 ) $ 512 $ 712 $ 25,761 $ 24 $ 25,737 Unsecured 927 (40 ) 106 19 1,012 — 1,012 Real estate: One-to-four family residential 2,281 (8 ) 12 (921 ) 1,364 115 1,249 Commercial & multifamily residential: Commercial land 799 — — 28 827 — 827 Income property 9,159 — 3,252 (3,971 ) 8,440 — 8,440 Owner occupied 5,007 — 9 596 5,612 24 5,588 Real estate construction: One-to-four family residential: Land and acquisition 1,197 — 2 (173 ) 1,026 67 959 Residential construction 1,860 — 26 (96 ) 1,790 — 1,790 Commercial & multifamily residential: Income property 622 — 3 202 827 — 827 Owner occupied 434 — — 65 499 — 499 Consumer 3,180 (891 ) 273 273 2,835 — 2,835 Purchased credit impaired 16,336 (4,100 ) 1,686 2,609 16,531 — 16,531 Unallocated 1,844 — — 1,866 3,710 — 3,710 Total $ 69,569 $ (6,425 ) $ 5,881 $ 1,209 $ 70,234 $ 230 $ 70,004 Changes in the allowance for unfunded commitments and letters of credit, a component of other liabilities in the consolidated balance sheet, are summarized as follows: Three Months Ended March 31, 2016 2015 (in thousands) Balance at beginning of period $ 2,930 $ 2,655 Net changes in the allowance for unfunded commitments and letters of credit — — Balance at end of period $ 2,930 $ 2,655 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 ALLL analysis. We review these loans to assess the ability of our borrowers to service all interest and principal obligations and, as a result, the risk rating may be adjusted accordingly. Loans risk rated as Substandard reflect loans where a loss is possible if loan weaknesses are not corrected. Doubtful rated loans have a high probability of loss, however, the amount of loss has not yet been determined. Loss rated loans are considered uncollectable and when identified, are charged off. The following is an analysis of the credit quality of our loan portfolio, excluding PCI loans, as of March 31, 2016 and December 31, 2015 : Pass Special Mention Substandard Doubtful Loss Total March 31, 2016 (in thousands) Loans, excluding PCI loans: Commercial business: Secured $ 2,185,283 $ 54,957 $ 63,792 $ — $ — $ 2,304,032 Unsecured 91,737 277 562 — — 92,576 Real estate: One-to-four family residential 170,788 461 1,075 — — 172,324 Commercial and multifamily residential: Commercial land 213,936 4,804 423 — — 219,163 Income property 1,306,718 6,394 11,351 — — 1,324,463 Owner occupied 933,090 7,978 15,126 — — 956,194 Real estate construction: One-to-four family residential: Land and acquisition 12,915 — 205 — — 13,120 Residential construction 118,843 — 845 — — 119,688 Commercial and multifamily residential: Income property 86,584 — — — — 86,584 Owner occupied 90,807 — 3,936 — — 94,743 Consumer 313,249 — 7,946 — — 321,195 Total $ 5,523,950 $ 74,871 $ 105,261 $ — $ — 5,704,082 Less: Allowance for loan and lease losses 56,200 Loans, excluding PCI loans, net $ 5,647,882 Pass Special Mention Substandard Doubtful Loss Total December 31, 2015 (in thousands) Loans, excluding PCI loans: Commercial business: Secured $ 2,146,729 $ 59,746 $ 56,217 $ — $ — $ 2,262,692 Unsecured 93,347 278 1,323 — — 94,948 Real estate: One-to-four family residential 171,945 52 1,439 — — 173,436 Commercial and multifamily residential: Commercial land 207,768 4,966 424 — — 213,158 Income property 1,296,043 5,889 8,847 — — 1,310,779 Owner occupied 918,986 9,668 17,662 — — 946,316 Real estate construction: One-to-four family residential: Land and acquisition 14,388 — 362 — — 14,750 Residential construction 119,243 — 1,132 — — 120,375 Commercial and multifamily residential: Income property 83,634 — — — — 83,634 Owner occupied 81,270 — 401 — — 81,671 Consumer 328,286 — 4,076 — — 332,362 Total $ 5,461,639 $ 80,599 $ 91,883 $ — $ — 5,634,121 Less: Allowance for loan and lease losses 54,446 Loans, excluding PCI loans, net $ 5,579,675 The following is an analysis of the credit quality of our PCI loan portfolio as of March 31, 2016 and December 31, 2015 : Pass Special Mention Substandard Doubtful Loss Total March 31, 2016 (in thousands) PCI loans: Commercial business: Secured $ 31,706 $ 99 $ 5,297 $ — $ — $ 37,102 Unsecured 1,106 — 1 — — 1,107 Real estate: One-to-four family residential 23,766 — 2,000 — — 25,766 Commercial and multifamily residential: Commercial land 8,037 — 623 — — 8,660 Income property 33,558 — 3,970 — — 37,528 Owner occupied 52,487 — 1,709 — — 54,196 Real estate construction: One-to-four family residential: Land and acquisition 1,143 — 315 — — 1,458 Residential construction 414 — 328 — — 742 Commercial and multifamily residential: Income property 1,283 — — — — 1,283 Owner occupied 526 — — — — 526 Consumer 19,531 — 695 — — 20,226 Total $ 173,557 $ 99 $ 14,938 $ — $ — 188,594 Less: Valuation discount resulting from acquisition accounting 15,393 Allowance for loan losses 13,064 PCI loans, net $ 160,137 Pass Special Mention Substandard Doubtful Loss Total December 31, 2015 (in thousands) PCI loans: Commercial business: Secured $ 31,468 $ 101 $ 5,995 $ — $ — $ 37,564 Unsecured 1,218 — 2 — — 1,220 Real estate: One-to-four family residential 25,018 — 2,177 — — 27,195 Commercial and multifamily residential: Commercial land 8,234 — 664 — — 8,898 Income property 36,426 — 5,916 — — 42,342 Owner occupied 53,071 261 1,736 — — 55,068 Real estate construction: One-to-four family residential: Land and acquisition 1,086 — 479 — — 1,565 Residential construction 427 — 334 — — 761 Commercial and multifamily residential: Income property 1,303 — — — — 1,303 Owner occupied 531 — — — — 531 Consumer 20,122 — 781 — — 20,903 Total $ 178,904 $ 362 $ 18,084 $ — $ — 197,350 Less: Valuation discount resulting from acquisition accounting 16,444 Allowance for loan losses 13,726 PCI loans, net $ 167,180

Other Real Estate Owned

Other Real Estate Owned	3 Months Ended
	Mar. 31, 2016
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]
Other Real Estate Owned	Other Real Estate Owned (“OREO”) The following tables set forth activity in OREO for the three months ended March 31, 2016 and 2015 : Three Months Ended March 31, 2016 2015 (in thousands) Balance, beginning of period $ 13,738 $ 22,190 Transfers in 105 4,692 Valuation adjustments (137 ) (197 ) Proceeds from sale of OREO property (1,326 ) (5,122 ) Gain on sale of OREO, net 47 1,736 Balance, end of period $ 12,427 $ 23,299 At March 31, 2016 , the carrying amount of foreclosed residential real estate properties held as a result of obtaining physical possession was $2.2 million and the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process was $1.3 million .

Covered Assets and FDIC Loss-sh

Covered Assets and FDIC Loss-sharing Asset	3 Months Ended
	Mar. 31, 2016
Covered Assets And FDIC Loss Sharing Asset
Covered Assets and FDIC Loss sharing Asset	FDIC Loss-sharing Asset and Covered Assets We are a party to eight loss-sharing agreements with the FDIC relating to four FDIC-assisted acquisitions. Such agreements cover a substantial portion of losses incurred on acquired covered loans and OREO. The loss-sharing agreements relate to the acquisitions of (1) Columbia River Bank in January 2010, (2) American Marine Bank in January 2010, (3) Summit Bank in May 2011, and (4) First Heritage Bank in May 2011. Under the terms of the loss-sharing agreements, the FDIC will absorb 80% of losses and share in 80% of loss recoveries up to specified amounts. With respect to loss-sharing agreements for two acquisitions completed in 2010, after those specified amounts, the FDIC will absorb 95% of losses and share in 95% of loss recoveries. The loss-sharing provisions of the agreements for non-single family and single family mortgage loans are in effect for five and ten years, respectively and the loss recovery provisions are in effect for eight and ten years, respectively. The loss-sharing provisions for the Columbia River Bank and American Marine Bank non-single family covered assets were effective through the end of the first quarter of 2015. In addition, the loss-sharing provisions for the Summit Bank and First Heritage Bank non-single family covered assets will be expiring at the end of the second quarter of 2016. Accordingly, further activity will be limited to recoveries through the first quarter of 2018 and second quarter of 2019, respectively, for assets covered by these loss-sharing agreements. Ten years and forty-five days after the applicable acquisition dates, the Bank must pay to the FDIC a clawback in the event the losses from the acquisitions fail to reach stated levels. The amount of the clawback is determined by a formula specified in each individual loss-sharing agreement. As of March 31, 2016 , the net present value of the Bank’s estimated clawback liability was $5.4 million , which was included in other liabilities on the consolidated balance sheets. At March 31, 2016 , the FDIC loss-sharing asset was comprised of a $4.6 million FDIC indemnification asset and a $1.4 million FDIC receivable. The indemnification asset represents the net present value of cash flows the Company expects to collect from the FDIC under the loss-sharing agreements and the FDIC receivable represents amounts from the FDIC for which the Company has requested reimbursement but has not yet received reimbursement. For PCI loans, the Company remeasures contractual and expected cash flows on a quarterly basis. When the quarterly remeasurement process results in a decrease in expected cash flows due to an increase in expected credit losses, impairment is recorded. As a result of this impairment, for loans covered by loss-sharing agreements with respect to which the loss-sharing provisions are still effective, the indemnification asset is increased to reflect anticipated future cash to be received from the FDIC. Consistent with the loss-sharing agreements between the Company and the FDIC, the amount of the increase to the indemnification asset is measured as 80% of the resulting impairment. Alternatively, when the quarterly remeasurement results in an increase in expected future cash flows due to a decrease in expected credit losses, the nonaccretable difference decreases and the effective yield of the related loan portfolio is increased. As a result of the improved expected cash flows, for loans covered by loss-sharing agreements with respect to which the loss-sharing provisions are still effective, the indemnification asset would be reduced first by the amount of any impairment previously recorded and, second, by increased amortization over the remaining life of the related loss-sharing agreement. The following table shows a detailed analysis of the FDIC loss-sharing asset for the three months ended March 31, 2016 and 2015 : Three Months Ended March 31, 2016 2015 (in thousands) Balance at beginning of period $ 6,568 $ 15,174 Adjustments not reflected in income: Cash (received from) paid to the FDIC, net 353 (659 ) FDIC reimbursable recoveries, net 136 (21 ) Adjustments reflected in income: Amortization, net (1,332 ) (2,294 ) Loan impairment 147 1,532 Sale of other real estate 144 (420 ) Write-downs of other real estate 18 1,071 Other (80 ) 261 Balance at end of period $ 5,954 $ 14,644 The following table presents information about the composition of the FDIC loss-sharing asset, the clawback liability, and the non-single family and the single family covered assets as of the date indicated: March 31, 2016 Columbia River Bank American Marine Bank Summit Bank First Heritage Bank Total (in thousands) FDIC loss-sharing asset $ 537 $ 2,404 $ 1,799 $ 1,214 $ 5,954 Clawback liability $ 3,420 $ 1,264 $ — $ 734 $ 5,418 Non-single family covered assets $ 66,682 $ 11,321 $ 8,381 $ 14,779 $ 101,163 Single family covered assets $ 7,764 $ 22,561 $ 6,046 $ 1,735 $ 38,106 Loss-sharing expiration dates: Non-single family First Quarter 2015 First Quarter 2015 Second Quarter 2016 Second Quarter 2016 Single family First Quarter 2020 First Quarter 2020 Second Quarter 2021 Second Quarter 2021 Loss recovery expiration dates: Non-single family First Quarter 2018 First Quarter 2018 Second Quarter 2019 Second Quarter 2019 Single family First Quarter 2020 First Quarter 2020 Second Quarter 2021 Second Quarter 2021

Goodwill and Intangible Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Other Intangible Assets In accordance with the Intangibles – Goodwill and Other topic of the FASB ASC, goodwill is not amortized but is reviewed for potential impairment at the reporting unit level. Management analyzes its goodwill for impairment on an annual basis on July 31 and between annual tests in certain circumstances such as material adverse changes in legal, business, regulatory and economic factors. An impairment loss is recorded to the extent that the carrying amount of goodwill exceeds its implied fair value. The core deposit intangible (“CDI”) is evaluated for impairment if events and circumstances indicate a possible impairment. The CDI is amortized on an accelerated basis over an estimated life of 10 years . The following table sets forth activity for goodwill and other intangible assets for the periods indicated: Three Months Ended March 31, 2016 2015 (in thousands) Goodwill Total goodwill $ 382,762 $ 382,537 Other intangible assets, net Core deposit intangible: Gross core deposit intangible balance at beginning of period 58,598 58,598 Accumulated amortization at beginning of period (35,940 ) (29,058 ) Core deposit intangible, net at beginning of period 22,658 29,540 CDI current period amortization (1,583 ) (1,817 ) Total core deposit intangible, net at end of period 21,075 27,723 Intangible assets not subject to amortization 919 919 Other intangible assets, net at end of period 21,994 28,642 Total goodwill and other intangible assets at end of period $ 404,756 $ 411,179 The following table provides the estimated future amortization expense of core deposit intangibles for the remaining nine months ending December 31, 2016 and the succeeding four years: Amount (in thousands) Year ending December 31, 2016 $ 4,363 2017 4,913 2018 3,855 2019 2,951 2020 2,048

Derivatives and Balance Sheet O

Derivatives and Balance Sheet Offsetting	3 Months Ended
	Mar. 31, 2016
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Derivatives and Hedging Activities	Derivatives and Balance Sheet Offsetting The Company periodically enters into certain commercial loan interest rate swap agreements in order to provide commercial loan customers the ability to convert from variable to fixed interest rates. Under these agreements, the Company enters into a variable-rate loan agreement with a customer in addition to a swap agreement. This swap agreement effectively converts the customer’s variable rate loan into a fixed rate. The Company then enters into a corresponding swap agreement with a third-party in order to offset its exposure on the variable and fixed components of the customer agreement. As the interest rate swap agreements with the customers and third parties are not designated as hedges under the Derivatives and Hedging topic of the FASB ASC, the instruments are marked to market in earnings. The notional amount of open interest rate swap agreements at March 31, 2016 and December 31, 2015 was $267.5 million and $264.4 million , respectively. During the three months ended March 31, 2016 and 2015 , mark-to-market losses of $8 thousand and $5 thousand , respectively were recorded to other noninterest expense. The following table presents the fair value of derivatives not designated as hedging instruments at March 31, 2016 and December 31, 2015 : Asset Derivatives Liability Derivatives March 31, 2016 December 31, 2015 March 31, 2016 December 31, 2015 Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value (in thousands) Interest rate contracts Other assets $ 18,641 Other assets $ 12,438 Other liabilities $ 18,689 Other liabilities $ 12,478 The Company is party to interest rate contracts and repurchase agreements that are subject to enforceable master netting arrangements or similar agreements. Under these agreements, the Company may have the right to net settle multiple contracts with the same counterparty. The following tables show the gross interest rate swap agreements and repurchase agreements in the consolidated balance sheets and the respective collateral received or pledged in the form of other financial instruments, which are generally marketable securities. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of overcollateralization are not shown. Gross Amounts of Recognized Assets/Liabilities Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts of Assets/Liabilities Presented in the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheets Collateral Posted Net Amount March 31, 2016 (in thousands) Assets Interest rate contracts $ 18,641 $ — $ 18,641 $ — $ 18,641 Liabilities Interest rate contracts $ 18,689 $ — $ 18,689 $ (18,689 ) $ — Repurchase agreements $ 73,839 $ — $ 73,839 $ (73,839 ) $ — December 31, 2015 Assets Interest rate contracts $ 12,438 $ — $ 12,438 $ — $ 12,438 Liabilities Interest rate contracts $ 12,478 $ — $ 12,478 $ (12,478 ) $ — Repurchase agreements $ 99,699 $ — $ 99,699 $ (99,699 ) $ — The following table presents the class of collateral pledged for repurchase agreements as well as the remaining contractual maturity of the repurchase agreements: Remaining contractual maturity of the agreements Overnight and continuous Up to 30 days 30 - 90 days Greater than 90 days Total March 31, 2016 (in thousands) Class of collateral pledged for repurchase agreements U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 48,839 $ — $ — $ 25,000 $ 73,839 Gross amount of recognized liabilities for repurchase agreements 73,839 Amounts related to agreements not included in offsetting disclosure $ — The collateral utilized for the Company’s repurchase agreements is subject to market fluctuations as well as prepayments of principal. The Company monitors the risk of the fair value of its pledged collateral falling below acceptable amounts based on the type of the underlying repurchase agreement. The pledged collateral related to the Company’s term wholesale repurchase agreement, which matures in 2018, is monitored on a monthly basis and additional capital is pledged when necessary. The pledged collateral related to the Company’s sweep repurchase agreements, which mature on an overnight basis, is monitored on a daily basis as the underlying sweep accounts can have frequent transaction activity and the amount of pledged collateral is adjusted as necessary.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Commitments and Contingent Liabilities Lease Commitments: The Company leases locations as well as equipment under various non-cancellable operating leases that expire between 2016 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. Financial Instruments with Off-Balance Sheet Risk: In the normal course of business, the Company makes loan commitments (typically unfunded loans and unused lines of credit) and issues standby letters of credit to accommodate the financial needs of its customers. At March 31, 2016 and December 31, 2015 , the Company’s loan commitments amounted to $1.96 billion and $1.93 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 $46.9 million and $38.7 million at March 31, 2016 and December 31, 2015 , respectively. In addition, commitments under commercial letters of credit used to facilitate customers’ trade transactions and other off-balance sheet liabilities amounted to $5.6 million and $5.0 million at March 31, 2016 and December 31, 2015 , respectively. Legal Proceedings: The Company and its subsidiaries are from time to time defendants in and are threatened with various legal proceedings arising from their regular business activities. Management, after consulting with legal counsel, is of the opinion that the ultimate liability, if any, resulting from these pending or threatened actions and proceedings will not have a material effect on the financial statements of the Company.

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2016
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”). The Series B Preferred Stock is not subject to the operation of a sinking fund. The Series B Preferred Stock is not redeemable by the Company and is perpetual with no maturity. The holders of Series B Preferred Stock have no general voting rights. If the Company declares and pays a dividend to its common shareholders, it must declare and pay to its holders of Series B Preferred Stock, on the same date, a dividend in an amount per share of the Series B Preferred Stock that is intended to provide such holders dividends in the amount they would have received if shares of Series B Preferred Stock had been converted into common stock as of that date. The outstanding shares of Series B Preferred Stock are convertible into 102,363 shares of Company common stock. Dividends. On January 28, 2016 , the Company declared a quarterly cash dividend of $0.18 per common share and common share equivalent for holders of preferred stock, and a special cash dividend of $0.20 per common share and common share equivalent for holders of preferred stock, both payable on February 24, 2016 to shareholders of record at the close of business on February 10, 2016 . Subsequent to quarter end, on April 27, 2016 , the Company declared a regular quarterly cash dividend of $0.19 per common share and common share equivalent for holders of preferred stock, and a special cash dividend of $0.18 per common share and common share equivalent for holders of preferred stock, both payable on May 25, 2016 to shareholders of record at the close of business on May 11, 2016 . The payment of cash dividends is subject to federal regulatory requirements for capital levels and other restrictions. In addition, the cash dividends paid by Columbia Bank to the Company are subject to both federal and state regulatory requirements.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Abstract]
Accumulated Other Comprehensive Income	ccumulated Other Comprehensive Income (Loss) The following table shows changes in accumulated other comprehensive income (loss) by component for the three month periods ended March 31, 2016 and 2015 : Unrealized Gains and Losses on Available-for-Sale Securities (1) Unrealized Gains and Losses on Pension Plan Liability (1) Total (1) Three months ended March 31, 2016 (in thousands) Beginning balance $ 386 $ (6,681 ) $ (6,295 ) Other comprehensive income before reclassifications 18,770 — 18,770 Amounts reclassified from accumulated other comprehensive income (loss) (238 ) 106 (132 ) Net current-period other comprehensive income 18,532 106 18,638 Ending balance $ 18,918 $ (6,575 ) $ 12,343 Three months ended March 31, 2015 Beginning balance $ 7,462 $ (1,841 ) $ 5,621 Other comprehensive income (loss) before reclassifications 9,376 (280 ) 9,096 Amounts reclassified from accumulated other comprehensive income (loss) (459 ) 28 (431 ) Net current-period other comprehensive income (loss) 8,917 (252 ) 8,665 Ending balance $ 16,379 $ (2,093 ) $ 14,286 __________ (1) All amounts are net of tax. Amounts in parenthesis indicate debits. The following table shows details regarding the reclassifications from accumulated other comprehensive income (loss) for the three month periods ended March 31, 2016 and 2015 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended March 31, Affected line Item in the Consolidated 2016 2015 Statement of Income (in thousands) Unrealized gains and losses on available-for-sale securities Investment securities gains $ 373 $ 721 Investment securities gains, net 373 721 Total before tax (135 ) (262 ) Income tax provision $ 238 $ 459 Net of tax Amortization of pension plan liability Actuarial losses $ (167 ) $ (44 ) Compensation and employee benefits (167 ) (44 ) Total before tax 61 16 Income tax benefit $ (106 ) $ (28 ) Net of tax

Fair Value Accounting and Measu

Fair Value Accounting and Measurement	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Accounting and Measurement	Fair Value Accounting and Measurement The Fair Value Measurements and Disclosures topic of the FASB ASC defines fair value, establishes a consistent framework for measuring fair value and expands disclosure requirements about fair value. We hold fixed and variable rate interest-bearing securities, investments in marketable equity securities and certain other financial instruments, which are carried at fair value. Fair value is determined based upon quoted prices when available or through the use of alternative approaches, such as matrix or model pricing, when market quotes are not readily accessible or available. The valuation techniques are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our own market assumptions. These two types of inputs create the following fair value hierarchy: Level 1 – Quoted prices for identical instruments in active markets that are accessible at the measurement date. Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model derived valuations whose inputs are observable or whose significant value drivers are observable. Level 3 – Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable. Fair values are determined as follows: Securities at fair value are priced using a combination of market activity, industry recognized information sources, yield curves, discounted cash flow models and other factors. These fair value calculations are considered a Level 2 input method under the provisions of the Fair Value Measurements and Disclosures topic of the FASB ASC for all securities other than U.S. Treasury Notes, which are considered a Level 1 input method. Interest rate contract positions are valued in models, which use as their basis, readily observable market parameters and are classified within Level 2 of the valuation hierarchy. The following table sets forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis at March 31, 2016 and December 31, 2015 by level within the fair value hierarchy. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement: Fair value Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 March 31, 2016 (in thousands) Assets Securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 1,330,100 $ — $ 1,330,100 $ — State and municipal debt securities 491,387 — 491,387 — U.S. government agency and government-sponsored enterprise securities 358,941 — 358,941 — U.S. government securities 547 547 — — Other securities 5,191 — 5,191 — Total securities available for sale $ 2,186,166 $ 547 $ 2,185,619 $ — Other assets (Interest rate contracts) $ 18,641 $ — $ 18,641 $ — Liabilities Other liabilities (Interest rate contracts) $ 18,689 $ — $ 18,689 $ — Fair value Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 December 31, 2015 (in thousands) Assets Securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 1,286,489 $ — $ 1,286,489 $ — State and municipal debt securities 492,169 — 492,169 — U.S. government agency and government-sponsored enterprise securities 353,782 — 353,782 — U.S. government securities 20,137 20,137 — — Other securities 5,117 — 5,117 — Total securities available for sale $ 2,157,694 $ 20,137 $ 2,137,557 $ — Other assets (Interest rate contracts) $ 12,438 $ — $ 12,438 $ — Liabilities Other liabilities (Interest rate contracts) $ 12,478 $ — $ 12,478 $ — There were no transfers between Level 1 and Level 2 of the valuation hierarchy during the three month periods ended March 31, 2016 and 2015 . 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 ALLL 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 ALLL, or in the event of a write-up without previous losses charged to the ALLL, a credit to earnings is recorded. Management periodically reviews OREO in an effort to ensure the property is recorded at its fair value, net of estimated costs to sell. Any fair value adjustments subsequent to acquisition are charged or credited to earnings. The initial and subsequent evaluations are performed by officers in the Special Credits group, which reports to the Chief Credit Officer. The REASD obtains appraisals from third-parties for OREO and performs internal evaluations. If an appraisal is obtained from a third-party, the REASD reviews the appraisal to evaluate the adequacy of the appraisal report, including its scope, methods, accuracy, and reasonableness. The following tables set forth information related to the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the current and prior year quarterly periods: Fair value at Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 10,681 $ — $ — $ 10,681 $ 2,676 OREO 2,553 — — 2,553 137 $ 13,234 $ — $ — $ 13,234 $ 2,813 Fair value at Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended Level 1 Level 2 Level 3 (in thousands) OREO $ 1,429 $ — $ — $ 1,429 $ 197 $ 1,429 $ — $ — $ 1,429 $ 197 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 $ 10,681 Fair Market Value of Collateral Adjustment to Stated Value 0% - 7% (6%) OREO 2,553 Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) (1) Discount applied to appraisal value, letter of intent to purchase, or stated value (in the case of accounts receivable, inventory and equipment). (2) Quantitative disclosures are not provided for impaired loans and OREO because there were no adjustments made to the appraisal values or stated values during the current period. Fair value at Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) OREO $ 1,429 Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) (1) Discount applied to appraisal value, letter of intent to purchase, or stated value (in the case of accounts receivable, inventory and equipment). (2) Quantitative disclosures are not provided for OREO because there were no adjustments made to the appraisal value during the current period. Fair value of financial instruments Because broadly traded markets do not exist for most of the Company’s financial instruments, the fair value calculations attempt to incorporate the effect of current market conditions at a specific time. These determinations are subjective in nature, involve uncertainties and matters of significant judgment and do not include tax ramifications; therefore, the results cannot be determined with precision, substantiated by comparison to independent markets and may not be realized in an actual sale or immediate settlement of the instruments. There may be inherent weaknesses in any calculation technique, and changes in the underlying assumptions used, including discount rates and estimates of future cash flows, could significantly affect the results. For all of these reasons, the aggregation of the fair value calculations presented herein do not represent, and should not be construed to represent, the underlying value of the Company. The following methods and assumptions were used to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value: Cash and due from banks and interest-earning deposits with banks —The fair value of financial instruments that are short-term or reprice frequently and that have little or no risk are considered to have a fair value that approximates carrying value (Level 1). Securities available for sale —Securities at fair value, other than U.S. Treasury Notes, are priced using a combination of market activity, industry recognized information sources, yield curves, discounted cash flow models and other factors (Level 2). U.S. Treasury Notes are priced using quotes in active markets (Level 1). Federal Home Loan Bank stock —The fair value is based upon the par value of the stock which equates to its carrying value (Level 2). Loans held for sale —The carrying amount of loans held for sale approximates their fair values due to the short period of time between the origination and sale dates (Level 2). Loans —Loans are not recorded at fair value on a recurring basis . Nonrecurring fair value adjustments are periodically recorded on impaired loans that are measured for impairment based on the fair value of collateral. For most performing loans, fair value is estimated using expected duration and lending rates that would have been offered on March 31, 2016 or December 31, 2015 , for loans which mirror the attributes of the loans with similar rate structures and average maturities. The fair values resulting from these calculations are reduced by an amount representing the change in estimated fair value attributable to changes in borrowers’ credit quality since the loans were originated. For nonperforming loans, fair value is estimated by applying a valuation discount based upon loan sales data from the FDIC. For PCI loans, fair value is estimated by discounting the expected future cash flows using a lending rate that would have been offered on March 31, 2016 (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 models, which use readily observable market parameters as their basis (Level 2). Deposits —For deposits with no contractual maturity, the fair value is equal to the carrying value (Level 1). The fair value of fixed maturity deposits is based on discounted cash flows using the difference between the deposit rate and current market rates for deposits of similar remaining maturities (Level 2). FHLB advances —The fair value of FHLB advances is estimated based on discounting the future cash flows using the market rate currently offered (Level 2). Repurchase Agreements —The fair value of term repurchase agreements is estimated based on discounting the future cash flows using the market rate currently offered. The carrying amount of sweep repurchase agreements approximates their fair values due to the short period of time between repricing dates (Level 2). Other Financial Instruments —The majority of our commitments to extend credit and standby letters of credit carry current market interest rates if converted to loans, as such, carrying value is assumed to equal fair value. The following tables summarize carrying amounts and estimated fair values of selected financial instruments as well as assumptions used by the Company in estimating fair value at March 31, 2016 and December 31, 2015 : March 31, 2016 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 150,683 $ 150,683 $ 150,683 $ — $ — Interest-earning deposits with banks 38,248 38,248 38,248 — — Securities available for sale 2,186,166 2,186,166 547 2,185,619 — FHLB stock 10,241 10,241 — 10,241 — Loans held for sale 3,681 3,681 — 3,681 — Loans 5,808,019 5,889,840 — — 5,889,840 FDIC loss-sharing asset 5,954 1,613 — — 1,613 Interest rate contracts 18,641 18,641 — 18,641 — Liabilities Deposits $ 7,596,949 $ 7,593,830 $ 7,162,893 $ 430,937 $ — FHLB Advances 6,521 7,459 — 7,459 — Repurchase agreements 73,839 74,353 — 74,353 — Interest rate contracts 18,689 18,689 — 18,689 — December 31, 2015 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 166,929 $ 166,929 $ 166,929 $ — $ — Interest-earning deposits with banks 8,373 8,373 8,373 — — Securities available for sale 2,157,694 2,157,694 20,137 2,137,557 — FHLB stock 12,722 12,722 — 12,722 — Loans held for sale 4,509 4,509 — 4,509 — Loans 5,746,855 5,752,423 — — 5,752,423 FDIC loss-sharing asset 6,568 921 — — 921 Interest rate contracts 12,438 12,438 — 12,438 — Liabilities Deposits $ 7,438,829 $ 7,434,787 $ 6,979,924 $ 454,863 $ — FHLB Advances 68,531 69,176 — 69,176 — Repurchase agreements 99,699 100,346 — 100,346 — Interest rate contracts 12,478 12,478 — 12,478 —

Earnings per Common Share

Earnings per Common Share	3 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings per Common Share The Company applies the two-class method of computing basic and diluted EPS. Under the two-class method, EPS is determined for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. The Company issues restricted shares under share-based compensation plans and preferred shares which qualify as participating securities. The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2016 and 2015 : Three Months Ended March 31, 2016 2015 (in thousands except per share) Basic EPS: Net income $ 21,259 $ 24,361 Less: Earnings allocated to participating securities: Preferred shares 39 43 Nonvested restricted shares 247 225 Earnings allocated to common shareholders $ 20,973 $ 24,093 Weighted average common shares outstanding 57,114 56,965 Basic earnings per common share $ 0.37 $ 0.42 Diluted EPS: Earnings allocated to common shareholders (1) $ 20,973 $ 24,093 Weighted average common shares outstanding 57,114 56,965 Dilutive effect of equity awards 11 13 Weighted average diluted common shares outstanding 57,125 56,978 Diluted earnings per common share $ 0.37 $ 0.42 Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive 27 53 __________ (1) Earnings allocated to common shareholders for basic and diluted EPS may differ under the two-class method as a result of adding common stock equivalents for options and warrants to dilutive shares outstanding, which alters the ratio used to allocate earnings to common shareholders and participating securities for the purposes of calculating diluted EPS.

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2016
Available-for-sale Securities [Abstract]
Securities Available for Sale	The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of securities available for sale: Amortized Gross Gross Fair Value (in thousands) March 31, 2016 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 1,319,714 $ 14,247 $ (3,861 ) $ 1,330,100 State and municipal securities 477,544 14,257 (414 ) 491,387 U.S. government agency and government-sponsored enterprise securities 353,910 5,031 — 358,941 U.S. government securities 547 — — 547 Other securities 5,284 53 (146 ) 5,191 Total $ 2,156,999 $ 33,588 $ (4,421 ) $ 2,186,166 December 31, 2015 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 1,296,955 $ 4,525 $ (14,991 ) $ 1,286,489 State and municipal securities 480,417 12,690 (938 ) 492,169 U.S. government agency and government-sponsored enterprise securities 354,515 1,113 (1,846 ) 353,782 U.S. government securities 20,439 — (302 ) 20,137 Other securities 5,284 24 (191 ) 5,117 Total $ 2,157,610 $ 18,352 $ (18,268 ) $ 2,157,694
Schedule of gross realized gains and losses on sales and calls of securities available for sale	The following table provides the gross realized gains and losses on the sales of securities for the periods indicated: Three Months Ended March 31, 2016 2015 (in thousands) Gross realized gains $ 373 $ 730 Gross realized losses — (9 ) Net realized gains $ 373 $ 721
Schedule of Contractual Maturities of Investment Securities Available for Sale	The scheduled contractual maturities of investment securities available for sale at March 31, 2016 are presented as follows: March 31, 2016 Amortized Cost Fair Value (in thousands) Due within one year $ 39,056 $ 39,243 Due after one year through five years 435,423 440,733 Due after five years through ten years 711,190 723,977 Due after ten years 966,046 977,022 Other securities with no stated maturity 5,284 5,191 Total investment securities available-for-sale $ 2,156,999 $ 2,186,166
Carrying Value of Securities Pledged As Collateral	The following table summarizes the carrying value of securities pledged as collateral to secure public deposits, borrowings and other purposes as permitted or required by law: March 31, 2016 (in thousands) Washington and Oregon State to secure public deposits $ 339,424 Federal Reserve Bank to secure borrowings 48,879 Other securities pledged 156,551 Total securities pledged as collateral $ 544,854 The following table presents the class of collateral pledged for repurchase agreements as well as the remaining contractual maturity of the repurchase agreements: Remaining contractual maturity of the agreements Overnight and continuous Up to 30 days 30 - 90 days Greater than 90 days Total March 31, 2016 (in thousands) Class of collateral pledged for repurchase agreements U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 48,839 $ — $ — $ 25,000 $ 73,839 Gross amount of recognized liabilities for repurchase agreements 73,839 Amounts related to agreements not included in offsetting disclosure $ —
Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses	The following table shows the gross unrealized losses and fair value of the Company’s investments with unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at March 31, 2016 and December 31, 2015 : Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized (in thousands) March 31, 2016 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 95,313 $ (533 ) $ 190,975 $ (3,328 ) $ 286,288 $ (3,861 ) State and municipal securities 25,702 (125 ) 19,010 (289 ) 44,712 (414 ) U.S. government agency and government-sponsored enterprise securities 4,063 — 500 — 4,563 — Other securities — — 2,810 (146 ) 2,810 (146 ) Total $ 125,078 $ (658 ) $ 213,295 $ (3,763 ) $ 338,373 $ (4,421 ) December 31, 2015 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 664,509 $ (7,610 ) $ 214,325 $ (7,381 ) $ 878,834 $ (14,991 ) State and municipal securities 48,261 (358 ) 31,383 (580 ) 79,644 (938 ) U.S. government agency and government-sponsored enterprise securities 193,400 (1,128 ) 40,034 (718 ) 233,434 (1,846 ) U.S. government securities 10,343 (136 ) 9,794 (166 ) 20,137 (302 ) Other securities 2,300 (15 ) 2,780 (176 ) 5,080 (191 ) Total $ 918,813 $ (9,247 ) $ 298,316 $ (9,021 ) $ 1,217,129 $ (18,268 )

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Analysis of Loan Portfolio by Major Types of Loans	The following is an analysis of the loan portfolio by segment (net of unearned income): March 31, 2016 December 31, 2015 Loans, excluding PCI loans PCI Loans Total Loans, excluding PCI loans PCI Loans Total (in thousands) Commercial business $ 2,401,193 $ 34,474 $ 2,435,667 $ 2,362,575 $ 34,848 $ 2,397,423 Real estate: One-to-four family residential 175,050 22,720 197,770 176,295 23,938 200,233 Commercial and multifamily residential 2,520,352 93,979 2,614,331 2,491,736 99,389 2,591,125 Total real estate 2,695,402 116,699 2,812,101 2,668,031 123,327 2,791,358 Real estate construction: One-to-four family residential 133,447 2,163 135,610 135,874 2,278 138,152 Commercial and multifamily residential 183,548 1,618 185,166 167,413 1,630 169,043 Total real estate construction 316,995 3,781 320,776 303,287 3,908 307,195 Consumer 329,902 18,247 348,149 342,601 18,823 361,424 Less: Net unearned income (39,410 ) — (39,410 ) (42,373 ) — (42,373 ) Total loans, net of unearned income 5,704,082 173,201 5,877,283 5,634,121 180,906 5,815,027 Less: Allowance for loan and lease losses (56,200 ) (13,064 ) (69,264 ) (54,446 ) (13,726 ) (68,172 ) Total loans, net $ 5,647,882 $ 160,137 $ 5,808,019 $ 5,579,675 $ 167,180 $ 5,746,855 Loans held for sale $ 3,681 $ — $ 3,681 $ 4,509 $ — $ 4,509
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Analysis of Nonaccrual Loans	The following is an analysis of nonaccrual loans as of March 31, 2016 and December 31, 2015 : March 31, 2016 December 31, 2015 Recorded Unpaid Principal Recorded Unpaid Principal (in thousands) Commercial business: Secured $ 22,452 $ 31,039 $ 9,395 $ 15,688 Unsecured 107 331 42 256 Real estate: One-to-four family residential 730 1,702 820 1,866 Commercial & multifamily residential: Commercial land 238 247 349 332 Income property 2,897 3,185 2,843 3,124 Owner occupied 4,982 7,473 6,321 8,943 Real estate construction: One-to-four family residential: Land and acquisition 205 231 362 385 Residential construction 563 563 566 679 Consumer 4,717 4,985 766 990 Total $ 36,891 $ 49,756 $ 21,464 $ 32,263
Analysis of the Aged Loan Portfolio	The following is an aging of the recorded investment of the loan portfolio as of March 31, 2016 and December 31, 2015 : Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans March 31, 2016 (in thousands) Commercial business: Secured $ 2,277,121 $ 4,148 $ 311 $ — $ 4,459 $ 22,452 $ 2,304,032 Unsecured 91,785 684 — — 684 107 92,576 Real estate: One-to-four family residential 170,846 686 62 — 748 730 172,324 Commercial & multifamily residential: Commercial land 218,925 — — — — 238 219,163 Income property 1,321,566 — — — — 2,897 1,324,463 Owner occupied 946,635 4,577 — — 4,577 4,982 956,194 Real estate construction: One-to-four family residential: Land and acquisition 12,915 — — — — 205 13,120 Residential construction 119,125 — — — — 563 119,688 Commercial & multifamily residential: Income property 86,584 — — — — — 86,584 Owner occupied 94,743 — — — — — 94,743 Consumer 314,197 1,541 740 — 2,281 4,717 321,195 Total $ 5,654,442 $ 11,636 $ 1,113 $ — $ 12,749 $ 36,891 $ 5,704,082 Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans December 31, 2015 (in thousands) Commercial business: Secured $ 2,241,069 $ 11,611 $ 617 $ — $ 12,228 $ 9,395 $ 2,262,692 Unsecured 94,867 39 — — 39 42 94,948 Real estate: One-to-four family residential 170,913 1,637 66 — 1,703 820 173,436 Commercial & multifamily residential: Commercial land 212,740 69 — — 69 349 213,158 Income property 1,305,502 1,750 684 — 2,434 2,843 1,310,779 Owner occupied 939,396 599 — — 599 6,321 946,316 Real estate construction: One-to-four family residential: Land and acquisition 14,388 — — — — 362 14,750 Residential construction 119,809 — — — — 566 120,375 Commercial & multifamily residential: Income property 83,634 — — — — — 83,634 Owner occupied 81,671 — — — — — 81,671 Consumer 328,219 2,597 780 — 3,377 766 332,362 Total $ 5,592,208 $ 18,302 $ 2,147 $ — $ 20,449 $ 21,464 $ 5,634,121
Impaired Financing Receivables	The following is an analysis of impaired loans as of March 31, 2016 and December 31, 2015 : Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid March 31, 2016 (in thousands) Commercial business: Secured $ 2,285,351 $ 18,681 $ 11,861 $ 11,996 $ 2,500 $ 6,820 $ 12,314 Unsecured 92,576 — — — — — — Real estate: One-to-four family residential 171,660 664 — — — 664 1,093 Commercial & multifamily residential: Commercial land 219,163 — — — — — — Income property 1,322,410 2,053 — — — 2,053 2,257 Owner occupied 951,216 4,978 — — — 4,978 7,390 Real estate construction: One-to-four family residential: Land and acquisition 12,810 310 — — — 310 334 Residential construction 119,126 562 — — — 562 562 Commercial & multifamily residential: Income property 86,584 — — — — — — Owner occupied 94,743 — — — — — — Consumer 319,628 1,567 15 15 15 1,552 1,634 Total $ 5,675,267 $ 28,815 $ 11,876 $ 12,011 $ 2,515 $ 16,939 $ 25,584 Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid December 31, 2015 (in thousands) Commercial business: Secured $ 2,257,168 $ 5,524 $ 690 $ 718 $ 321 $ 4,834 $ 6,455 Unsecured 94,948 — — — — — — Real estate: One-to-four family residential 172,150 1,286 314 339 314 972 1,397 Commercial & multifamily residential: Commercial land 213,158 — — — — — — Income property 1,308,673 2,106 — — — 2,106 2,311 Owner occupied 940,261 6,055 — — — 6,055 8,528 Real estate construction: One-to-four family residential: Land and acquisition 14,283 467 — — — 467 490 Residential construction 119,813 562 335 335 3 227 227 Commercial & multifamily residential: Income property 83,634 — — — — — — Owner occupied 81,671 — — — — — — Consumer 332,282 80 15 15 15 65 139 Total $ 5,618,041 $ 16,080 $ 1,354 $ 1,407 $ 653 $ 14,726 $ 19,547 The following table provides additional information on impaired loans for the three month periods indicated: Three Months Ended March 31, 2016 2015 Average Recorded Interest Recognized Average Recorded Interest Recognized (in thousands) Commercial business: Secured $ 12,103 $ 17 $ 10,698 $ 7 Unsecured — — 1 — Real estate: One-to-four family residential 975 6 3,162 13 Commercial & multifamily residential: Commercial land — — 235 — Income property 2,080 3 4,168 10 Owner occupied 5,516 7 7,938 234 Real estate construction: One-to-four family residential: Land and acquisition 388 1 544 1 Residential construction 562 — 446 — Consumer 824 2 404 2 Total $ 22,448 $ 36 $ 27,596 $ 267
Analysis of loans classified as Troubled Debt Restructurings (“TDR”)	Three Months Ended March 31, 2016 2015 Average Recorded Interest Recognized Average Recorded Interest Recognized (in thousands) Commercial business: Secured $ 12,103 $ 17 $ 10,698 $ 7 Unsecured — — 1 — Real estate: One-to-four family residential 975 6 3,162 13 Commercial & multifamily residential: Commercial land — — 235 — Income property 2,080 3 4,168 10 Owner occupied 5,516 7 7,938 234 Real estate construction: One-to-four family residential: Land and acquisition 388 1 544 1 Residential construction 562 — 446 — Consumer 824 2 404 2 Total $ 22,448 $ 36 $ 27,596 $ 267 The following is an analysis of loans classified as troubled debt restructurings (“TDR”) during the three months ended March 31, 2016 and 2015 : Three months ended March 31, 2016 Three months ended March 31, 2015 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial business: Secured 3 $ 1,370 $ 1,370 — $ — $ — Commercial and multifamily residential: Owner occupied 1 250 250 — — — Consumer 4 497 497 — — — Total 8 $ 2,117 $ 2,117 — $ — $ —
Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Analysis of Loan Portfolio by Major Types of Loans	The following is an analysis of our PCI loans, net of related allowance for losses and remaining valuation discounts as of March 31, 2016 and December 31, 2015 : March 31, 2016 December 31, 2015 (in thousands) Commercial business $ 38,209 $ 38,784 Real estate: One-to-four family residential 25,766 27,195 Commercial and multifamily residential 100,384 106,308 Total real estate 126,150 133,503 Real estate construction: One-to-four family residential 2,200 2,326 Commercial and multifamily residential 1,809 1,834 Total real estate construction 4,009 4,160 Consumer 20,226 20,903 Subtotal of PCI loans 188,594 197,350 Less: Valuation discount resulting from acquisition accounting 15,393 16,444 Allowance for loan losses 13,064 13,726 PCI loans, net of allowance for loan losses $ 160,137 $ 167,180
Changes in Accretable Yield for Acquired Loans	The following table shows the changes in accretable yield for PCI loans for the three months ended March 31, 2016 and 2015 : Three Months Ended March 31, 2016 2015 (in thousands) Balance at beginning of period $ 58,981 $ 73,849 Accretion (4,229 ) (6,319 ) Disposals 94 (1,093 ) Reclassifications from nonaccretable difference 1,761 2,289 Balance at end of period $ 56,607 $ 68,726

Allowance for Loan and Lease 25

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Tables)	3 Months Ended
	Mar. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Credit Losses on Financing Receivables	The following tables show a detailed analysis of the ALLL for the three months ended March 31, 2016 and 2015 : Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General Three months ended March 31, 2016 (in thousands) Commercial business: Secured $ 32,321 $ (3,770 ) $ 611 $ 2,952 $ 32,114 $ 2,500 $ 29,614 Unsecured 1,299 (3 ) 51 (47 ) 1,300 — 1,300 Real estate: One-to-four family residential 916 — 41 (303 ) 654 — 654 Commercial & multifamily residential: Commercial land 1,178 — — 84 1,262 — 1,262 Income property 6,616 — 61 725 7,402 — 7,402 Owner occupied 5,550 — 8 528 6,086 — 6,086 Real estate construction: One-to-four family residential: Land and acquisition 339 — 51 250 640 — 640 Residential construction 733 — 203 513 1,449 — 1,449 Commercial & multifamily residential: Income property 388 — 1 326 715 — 715 Owner occupied 1,006 — — 204 1,210 — 1,210 Consumer 3,531 (266 ) 165 (62 ) 3,368 15 3,353 Purchased credit impaired 13,726 (2,866 ) 1,551 653 13,064 — 13,064 Unallocated 569 — — (569 ) — — — Total $ 68,172 $ (6,905 ) $ 2,743 $ 5,254 $ 69,264 $ 2,515 $ 66,749 Beginning Charge-offs Recoveries Provision (Recovery) Ending Specific General Three months ended March 31, 2015 (in thousands) Commercial business: Secured $ 25,923 $ (1,386 ) $ 512 $ 712 $ 25,761 $ 24 $ 25,737 Unsecured 927 (40 ) 106 19 1,012 — 1,012 Real estate: One-to-four family residential 2,281 (8 ) 12 (921 ) 1,364 115 1,249 Commercial & multifamily residential: Commercial land 799 — — 28 827 — 827 Income property 9,159 — 3,252 (3,971 ) 8,440 — 8,440 Owner occupied 5,007 — 9 596 5,612 24 5,588 Real estate construction: One-to-four family residential: Land and acquisition 1,197 — 2 (173 ) 1,026 67 959 Residential construction 1,860 — 26 (96 ) 1,790 — 1,790 Commercial & multifamily residential: Income property 622 — 3 202 827 — 827 Owner occupied 434 — — 65 499 — 499 Consumer 3,180 (891 ) 273 273 2,835 — 2,835 Purchased credit impaired 16,336 (4,100 ) 1,686 2,609 16,531 — 16,531 Unallocated 1,844 — — 1,866 3,710 — 3,710 Total $ 69,569 $ (6,425 ) $ 5,881 $ 1,209 $ 70,234 $ 230 $ 70,004
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 sheet, are summarized as follows: Three Months Ended March 31, 2016 2015 (in thousands) Balance at beginning of period $ 2,930 $ 2,655 Net changes in the allowance for unfunded commitments and letters of credit — — Balance at end of period $ 2,930 $ 2,655
Financing Receivable Credit Quality Indicators	The following is an analysis of the credit quality of our loan portfolio, excluding PCI loans, as of March 31, 2016 and December 31, 2015 : Pass Special Mention Substandard Doubtful Loss Total March 31, 2016 (in thousands) Loans, excluding PCI loans: Commercial business: Secured $ 2,185,283 $ 54,957 $ 63,792 $ — $ — $ 2,304,032 Unsecured 91,737 277 562 — — 92,576 Real estate: One-to-four family residential 170,788 461 1,075 — — 172,324 Commercial and multifamily residential: Commercial land 213,936 4,804 423 — — 219,163 Income property 1,306,718 6,394 11,351 — — 1,324,463 Owner occupied 933,090 7,978 15,126 — — 956,194 Real estate construction: One-to-four family residential: Land and acquisition 12,915 — 205 — — 13,120 Residential construction 118,843 — 845 — — 119,688 Commercial and multifamily residential: Income property 86,584 — — — — 86,584 Owner occupied 90,807 — 3,936 — — 94,743 Consumer 313,249 — 7,946 — — 321,195 Total $ 5,523,950 $ 74,871 $ 105,261 $ — $ — 5,704,082 Less: Allowance for loan and lease losses 56,200 Loans, excluding PCI loans, net $ 5,647,882 Pass Special Mention Substandard Doubtful Loss Total December 31, 2015 (in thousands) Loans, excluding PCI loans: Commercial business: Secured $ 2,146,729 $ 59,746 $ 56,217 $ — $ — $ 2,262,692 Unsecured 93,347 278 1,323 — — 94,948 Real estate: One-to-four family residential 171,945 52 1,439 — — 173,436 Commercial and multifamily residential: Commercial land 207,768 4,966 424 — — 213,158 Income property 1,296,043 5,889 8,847 — — 1,310,779 Owner occupied 918,986 9,668 17,662 — — 946,316 Real estate construction: One-to-four family residential: Land and acquisition 14,388 — 362 — — 14,750 Residential construction 119,243 — 1,132 — — 120,375 Commercial and multifamily residential: Income property 83,634 — — — — 83,634 Owner occupied 81,270 — 401 — — 81,671 Consumer 328,286 — 4,076 — — 332,362 Total $ 5,461,639 $ 80,599 $ 91,883 $ — $ — 5,634,121 Less: Allowance for loan and lease losses 54,446 Loans, excluding PCI loans, net $ 5,579,675 The following is an analysis of the credit quality of our PCI loan portfolio as of March 31, 2016 and December 31, 2015 : Pass Special Mention Substandard Doubtful Loss Total March 31, 2016 (in thousands) PCI loans: Commercial business: Secured $ 31,706 $ 99 $ 5,297 $ — $ — $ 37,102 Unsecured 1,106 — 1 — — 1,107 Real estate: One-to-four family residential 23,766 — 2,000 — — 25,766 Commercial and multifamily residential: Commercial land 8,037 — 623 — — 8,660 Income property 33,558 — 3,970 — — 37,528 Owner occupied 52,487 — 1,709 — — 54,196 Real estate construction: One-to-four family residential: Land and acquisition 1,143 — 315 — — 1,458 Residential construction 414 — 328 — — 742 Commercial and multifamily residential: Income property 1,283 — — — — 1,283 Owner occupied 526 — — — — 526 Consumer 19,531 — 695 — — 20,226 Total $ 173,557 $ 99 $ 14,938 $ — $ — 188,594 Less: Valuation discount resulting from acquisition accounting 15,393 Allowance for loan losses 13,064 PCI loans, net $ 160,137 Pass Special Mention Substandard Doubtful Loss Total December 31, 2015 (in thousands) PCI loans: Commercial business: Secured $ 31,468 $ 101 $ 5,995 $ — $ — $ 37,564 Unsecured 1,218 — 2 — — 1,220 Real estate: One-to-four family residential 25,018 — 2,177 — — 27,195 Commercial and multifamily residential: Commercial land 8,234 — 664 — — 8,898 Income property 36,426 — 5,916 — — 42,342 Owner occupied 53,071 261 1,736 — — 55,068 Real estate construction: One-to-four family residential: Land and acquisition 1,086 — 479 — — 1,565 Residential construction 427 — 334 — — 761 Commercial and multifamily residential: Income property 1,303 — — — — 1,303 Owner occupied 531 — — — — 531 Consumer 20,122 — 781 — — 20,903 Total $ 178,904 $ 362 $ 18,084 $ — $ — 197,350 Less: Valuation discount resulting from acquisition accounting 16,444 Allowance for loan losses 13,726 PCI loans, net $ 167,180

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	3 Months Ended
	Mar. 31, 2016
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]
Summary of Other Real Estate Owned	The following tables set forth activity in OREO for the three months ended March 31, 2016 and 2015 : Three Months Ended March 31, 2016 2015 (in thousands) Balance, beginning of period $ 13,738 $ 22,190 Transfers in 105 4,692 Valuation adjustments (137 ) (197 ) Proceeds from sale of OREO property (1,326 ) (5,122 ) Gain on sale of OREO, net 47 1,736 Balance, end of period $ 12,427 $ 23,299

Covered Assets and FDIC Loss-27

Covered Assets and FDIC Loss-sharing Asset (Tables)	3 Months Ended
	Mar. 31, 2016
Covered Assets And FDIC Loss Sharing Asset [Line Items]
FDIC Loss-sharing Asset	The following table shows a detailed analysis of the FDIC loss-sharing asset for the three months ended March 31, 2016 and 2015 : Three Months Ended March 31, 2016 2015 (in thousands) Balance at beginning of period $ 6,568 $ 15,174 Adjustments not reflected in income: Cash (received from) paid to the FDIC, net 353 (659 ) FDIC reimbursable recoveries, net 136 (21 ) Adjustments reflected in income: Amortization, net (1,332 ) (2,294 ) Loan impairment 147 1,532 Sale of other real estate 144 (420 ) Write-downs of other real estate 18 1,071 Other (80 ) 261 Balance at end of period $ 5,954 $ 14,644
Schedule of FDIC Loss-Sharing Agreements and Covered Assets [Table Text Block]	The following table presents information about the composition of the FDIC loss-sharing asset, the clawback liability, and the non-single family and the single family covered assets as of the date indicated: March 31, 2016 Columbia River Bank American Marine Bank Summit Bank First Heritage Bank Total (in thousands) FDIC loss-sharing asset $ 537 $ 2,404 $ 1,799 $ 1,214 $ 5,954 Clawback liability $ 3,420 $ 1,264 $ — $ 734 $ 5,418 Non-single family covered assets $ 66,682 $ 11,321 $ 8,381 $ 14,779 $ 101,163 Single family covered assets $ 7,764 $ 22,561 $ 6,046 $ 1,735 $ 38,106 Loss-sharing expiration dates: Non-single family First Quarter 2015 First Quarter 2015 Second Quarter 2016 Second Quarter 2016 Single family First Quarter 2020 First Quarter 2020 Second Quarter 2021 Second Quarter 2021 Loss recovery expiration dates: Non-single family First Quarter 2018 First Quarter 2018 Second Quarter 2019 Second Quarter 2019 Single family First Quarter 2020 First Quarter 2020 Second Quarter 2021 Second Quarter 2021

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill and Intangible Assets	The following table sets forth activity for goodwill and other intangible assets for the periods indicated: Three Months Ended March 31, 2016 2015 (in thousands) Goodwill Total goodwill $ 382,762 $ 382,537 Other intangible assets, net Core deposit intangible: Gross core deposit intangible balance at beginning of period 58,598 58,598 Accumulated amortization at beginning of period (35,940 ) (29,058 ) Core deposit intangible, net at beginning of period 22,658 29,540 CDI current period amortization (1,583 ) (1,817 ) Total core deposit intangible, net at end of period 21,075 27,723 Intangible assets not subject to amortization 919 919 Other intangible assets, net at end of period 21,994 28,642 Total goodwill and other intangible assets at end of period $ 404,756 $ 411,179
Estimated Future Amortization Expense of Core Deposit Intangibles	The following table provides the estimated future amortization expense of core deposit intangibles for the remaining nine months ending December 31, 2016 and the succeeding four years: Amount (in thousands) Year ending December 31, 2016 $ 4,363 2017 4,913 2018 3,855 2019 2,951 2020 2,048

Derivatives and Balance Sheet29

Derivatives and Balance Sheet Offsetting (Tables)	3 Months Ended
	Mar. 31, 2016
Derivative [Line Items]
Balance Sheet Offsetting [Table Text Block]	The following tables show the gross interest rate swap agreements and repurchase agreements in the consolidated balance sheets and the respective collateral received or pledged in the form of other financial instruments, which are generally marketable securities. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of overcollateralization are not shown. Gross Amounts of Recognized Assets/Liabilities Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts of Assets/Liabilities Presented in the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheets Collateral Posted Net Amount March 31, 2016 (in thousands) Assets Interest rate contracts $ 18,641 $ — $ 18,641 $ — $ 18,641 Liabilities Interest rate contracts $ 18,689 $ — $ 18,689 $ (18,689 ) $ — Repurchase agreements $ 73,839 $ — $ 73,839 $ (73,839 ) $ — December 31, 2015 Assets Interest rate contracts $ 12,438 $ — $ 12,438 $ — $ 12,438 Liabilities Interest rate contracts $ 12,478 $ — $ 12,478 $ (12,478 ) $ — Repurchase agreements $ 99,699 $ — $ 99,699 $ (99,699 ) $ —
Carrying Value of Securities Pledged As Collateral	The following table summarizes the carrying value of securities pledged as collateral to secure public deposits, borrowings and other purposes as permitted or required by law: March 31, 2016 (in thousands) Washington and Oregon State to secure public deposits $ 339,424 Federal Reserve Bank to secure borrowings 48,879 Other securities pledged 156,551 Total securities pledged as collateral $ 544,854 The following table presents the class of collateral pledged for repurchase agreements as well as the remaining contractual maturity of the repurchase agreements: Remaining contractual maturity of the agreements Overnight and continuous Up to 30 days 30 - 90 days Greater than 90 days Total March 31, 2016 (in thousands) Class of collateral pledged for repurchase agreements U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 48,839 $ — $ — $ 25,000 $ 73,839 Gross amount of recognized liabilities for repurchase agreements 73,839 Amounts related to agreements not included in offsetting disclosure $ —
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following table presents the fair value of derivatives not designated as hedging instruments at March 31, 2016 and December 31, 2015 : Asset Derivatives Liability Derivatives March 31, 2016 December 31, 2015 March 31, 2016 December 31, 2015 Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value (in thousands) Interest rate contracts Other assets $ 18,641 Other assets $ 12,438 Other liabilities $ 18,689 Other liabilities $ 12,478

Accumulated Other Comprehensi30

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table shows changes in accumulated other comprehensive income (loss) by component for the three month periods ended March 31, 2016 and 2015 : Unrealized Gains and Losses on Available-for-Sale Securities (1) Unrealized Gains and Losses on Pension Plan Liability (1) Total (1) Three months ended March 31, 2016 (in thousands) Beginning balance $ 386 $ (6,681 ) $ (6,295 ) Other comprehensive income before reclassifications 18,770 — 18,770 Amounts reclassified from accumulated other comprehensive income (loss) (238 ) 106 (132 ) Net current-period other comprehensive income 18,532 106 18,638 Ending balance $ 18,918 $ (6,575 ) $ 12,343 Three months ended March 31, 2015 Beginning balance $ 7,462 $ (1,841 ) $ 5,621 Other comprehensive income (loss) before reclassifications 9,376 (280 ) 9,096 Amounts reclassified from accumulated other comprehensive income (loss) (459 ) 28 (431 ) Net current-period other comprehensive income (loss) 8,917 (252 ) 8,665 Ending balance $ 16,379 $ (2,093 ) $ 14,286 __________ (1) All amounts are net of tax. Amounts in parenthesis indicate debits.
Schedule of reclassifications from accumulated other comprehensive income [Table Text Block]	The following table shows details regarding the reclassifications from accumulated other comprehensive income (loss) for the three month periods ended March 31, 2016 and 2015 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended March 31, Affected line Item in the Consolidated 2016 2015 Statement of Income (in thousands) Unrealized gains and losses on available-for-sale securities Investment securities gains $ 373 $ 721 Investment securities gains, net 373 721 Total before tax (135 ) (262 ) Income tax provision $ 238 $ 459 Net of tax Amortization of pension plan liability Actuarial losses $ (167 ) $ (44 ) Compensation and employee benefits (167 ) (44 ) Total before tax 61 16 Income tax benefit $ (106 ) $ (28 ) Net of tax

Fair Value Accounting and Mea31

Fair Value Accounting and Measurement (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets And Liabilities Accounted For Fair Value On Recurring Basis	The following table sets forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis at March 31, 2016 and December 31, 2015 by level within the fair value hierarchy. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement: Fair value Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 March 31, 2016 (in thousands) Assets Securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 1,330,100 $ — $ 1,330,100 $ — State and municipal debt securities 491,387 — 491,387 — U.S. government agency and government-sponsored enterprise securities 358,941 — 358,941 — U.S. government securities 547 547 — — Other securities 5,191 — 5,191 — Total securities available for sale $ 2,186,166 $ 547 $ 2,185,619 $ — Other assets (Interest rate contracts) $ 18,641 $ — $ 18,641 $ — Liabilities Other liabilities (Interest rate contracts) $ 18,689 $ — $ 18,689 $ — Fair value Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 December 31, 2015 (in thousands) Assets Securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 1,286,489 $ — $ 1,286,489 $ — State and municipal debt securities 492,169 — 492,169 — U.S. government agency and government-sponsored enterprise securities 353,782 — 353,782 — U.S. government securities 20,137 20,137 — — Other securities 5,117 — 5,117 — Total securities available for sale $ 2,157,694 $ 20,137 $ 2,137,557 $ — Other assets (Interest rate contracts) $ 12,438 $ — $ 12,438 $ — Liabilities Other liabilities (Interest rate contracts) $ 12,478 $ — $ 12,478 $ —
Financial Assets Accounted For Fair Value On Nonrecurring Basis	The following tables set forth information related to the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the current and prior year quarterly periods: Fair value at Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 10,681 $ — $ — $ 10,681 $ 2,676 OREO 2,553 — — 2,553 137 $ 13,234 $ — $ — $ 13,234 $ 2,813 Fair value at Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended Level 1 Level 2 Level 3 (in thousands) OREO $ 1,429 $ — $ — $ 1,429 $ 197 $ 1,429 $ — $ — $ 1,429 $ 197
Fair Value, by Balance Sheet Grouping	The following tables summarize carrying amounts and estimated fair values of selected financial instruments as well as assumptions used by the Company in estimating fair value at March 31, 2016 and December 31, 2015 : March 31, 2016 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 150,683 $ 150,683 $ 150,683 $ — $ — Interest-earning deposits with banks 38,248 38,248 38,248 — — Securities available for sale 2,186,166 2,186,166 547 2,185,619 — FHLB stock 10,241 10,241 — 10,241 — Loans held for sale 3,681 3,681 — 3,681 — Loans 5,808,019 5,889,840 — — 5,889,840 FDIC loss-sharing asset 5,954 1,613 — — 1,613 Interest rate contracts 18,641 18,641 — 18,641 — Liabilities Deposits $ 7,596,949 $ 7,593,830 $ 7,162,893 $ 430,937 $ — FHLB Advances 6,521 7,459 — 7,459 — Repurchase agreements 73,839 74,353 — 74,353 — Interest rate contracts 18,689 18,689 — 18,689 — December 31, 2015 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 166,929 $ 166,929 $ 166,929 $ — $ — Interest-earning deposits with banks 8,373 8,373 8,373 — — Securities available for sale 2,157,694 2,157,694 20,137 2,137,557 — FHLB stock 12,722 12,722 — 12,722 — Loans held for sale 4,509 4,509 — 4,509 — Loans 5,746,855 5,752,423 — — 5,752,423 FDIC loss-sharing asset 6,568 921 — — 921 Interest rate contracts 12,438 12,438 — 12,438 — Liabilities Deposits $ 7,438,829 $ 7,434,787 $ 6,979,924 $ 454,863 $ — FHLB Advances 68,531 69,176 — 69,176 — Repurchase agreements 99,699 100,346 — 100,346 — Interest rate contracts 12,478 12,478 — 12,478 —
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 $ 10,681 Fair Market Value of Collateral Adjustment to Stated Value 0% - 7% (6%) OREO 2,553 Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) (1) Discount applied to appraisal value, letter of intent to purchase, or stated value (in the case of accounts receivable, inventory and equipment). (2) Quantitative disclosures are not provided for impaired loans and OREO because there were no adjustments made to the appraisal values or stated values during the current period. Fair value at Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) OREO $ 1,429 Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) (1) Discount applied to appraisal value, letter of intent to purchase, or stated value (in the case of accounts receivable, inventory and equipment). (2) Quantitative disclosures are not provided for OREO because there were no adjustments made to the appraisal value during the current period.

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	3 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2016 and 2015 : Three Months Ended March 31, 2016 2015 (in thousands except per share) Basic EPS: Net income $ 21,259 $ 24,361 Less: Earnings allocated to participating securities: Preferred shares 39 43 Nonvested restricted shares 247 225 Earnings allocated to common shareholders $ 20,973 $ 24,093 Weighted average common shares outstanding 57,114 56,965 Basic earnings per common share $ 0.37 $ 0.42 Diluted EPS: Earnings allocated to common shareholders (1) $ 20,973 $ 24,093 Weighted average common shares outstanding 57,114 56,965 Dilutive effect of equity awards 11 13 Weighted average diluted common shares outstanding 57,125 56,978 Diluted earnings per common share $ 0.37 $ 0.42 Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive 27 53 __________ (1) Earnings allocated to common shareholders for basic and diluted EPS may differ under the two-class method as a result of adding common stock equivalents for options and warrants to dilutive shares outstanding, which alters the ratio used to allocate earnings to common shareholders and participating securities for the purposes of calculating diluted EPS.

Securities (Securities Availabl

Securities (Securities Available for Sale) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized cost	$ 2,156,999	$ 2,157,610
Available-for-sale Debt Securities Gross Unrealized Gain, instant	33,588	18,352
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(4,421)	(18,268)
Securities available for sale	2,186,166	2,157,694
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	1,319,714	1,296,955
Available-for-sale Debt Securities Gross Unrealized Gain, instant	14,247	4,525
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(3,861)	(14,991)
Securities available for sale	1,330,100	1,286,489
State and Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized cost	477,544	480,417
Available-for-sale Debt Securities Gross Unrealized Gain, instant	14,257	12,690
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(414)	(938)
Securities available for sale	491,387	492,169
U.S. Government and Government-Sponsored Enterprise Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized cost	353,910	354,515
Available-for-sale Debt Securities Gross Unrealized Gain, instant	5,031	1,113
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	(1,846)
Securities available for sale	358,941	353,782
US Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized cost	547	20,439
Available-for-sale Debt Securities Gross Unrealized Gain, instant	0	0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	(302)
Securities available for sale	547	20,137
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized cost	5,284	5,284
Available-for-sale Debt Securities Gross Unrealized Gain, instant	53	24
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(146)	(191)
Securities available for sale	$ 5,191	$ 5,117

Securities (Schedule of Contrac

Securities (Schedule of Contractual Maturities of Investment Securities Available for Sale) (Details) $ in Thousands	Mar. 31, 2016USD ($)
Available-for-sale Securities [Abstract]
Due within one year, Amortized Cost	$ 39,056
Due after one year through five years, Amortized Cost	435,423
Due after five years through ten years, Amortized Cost	711,190
Due after ten years, Amortized Cost	966,046
No stated maturity date, Amortized Cost Basis	5,284
Total investment securities available-for-sale, Amortized Cost	2,156,999
Due within one year, Fair Value	39,243
Due after one year through five years, Fair Value	440,733
Due after five years through ten years, Fair Value	723,977
Due after ten years, Fair Value	977,022
No stated maturity date, Fair Value	5,191
Total investment securities available-for-sale, Fair Value	$ 2,186,166

Securities (Carrying Value of S

Securities (Carrying Value of Securities Pledged as Collateral) (Details) $ in Thousands	Mar. 31, 2016USD ($)
Schedule of Available-for-sale Securities [Line Items]
Carrying amount of securities pledged as collateral	$ 544,854
Washington and Oregon State Public Deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Carrying amount of securities pledged as collateral	339,424
Federal Reserve Bank Advances [Member]
Schedule of Available-for-sale Securities [Line Items]
Carrying amount of securities pledged as collateral	48,879
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Carrying amount of securities pledged as collateral	$ 156,551

Securities (Summary of Gross Un

Securities (Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities Gross Unrealized Gain, instant	$ 33,588	$ 18,352
Less than 12 Months Fair Value	125,078	918,813
Less than 12 Months Unrealized Losses	(658)	(9,247)
12 Months or More Fair Value	213,295	298,316
12 Months or More Unrealized Losses	(3,763)	(9,021)
Total Fair Value	338,373	1,217,129
Total Unrealized Losses	(4,421)	(18,268)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	4,421	18,268
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	14,247	4,525
Less than 12 Months Fair Value	95,313	664,509
Less than 12 Months Unrealized Losses	(533)	(7,610)
12 Months or More Fair Value	190,975	214,325
12 Months or More Unrealized Losses	(3,328)	(7,381)
Total Fair Value	286,288	878,834
Total Unrealized Losses	(3,861)	(14,991)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	3,861	14,991
State and Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities Gross Unrealized Gain, instant	14,257	12,690
Less than 12 Months Fair Value	25,702	48,261
Less than 12 Months Unrealized Losses	(125)	(358)
12 Months or More Fair Value	19,010	31,383
12 Months or More Unrealized Losses	(289)	(580)
Total Fair Value	44,712	79,644
Total Unrealized Losses	(414)	(938)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	414	938
US Government Corporations and Agencies Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities Gross Unrealized Gain, instant	5,031	1,113
Less than 12 Months Fair Value	4,063	193,400
Less than 12 Months Unrealized Losses	0	(1,128)
12 Months or More Fair Value	500	40,034
12 Months or More Unrealized Losses	0	(718)
Total Fair Value	4,563	233,434
Total Unrealized Losses	0	(1,846)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	1,846
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		10,343
Less than 12 Months Unrealized Losses		(136)
12 Months or More Fair Value		9,794
12 Months or More Unrealized Losses		(166)
Total Fair Value		20,137
Total Unrealized Losses		(302)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	302
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities Gross Unrealized Gain, instant	53	24
Less than 12 Months Fair Value	0	2,300
Less than 12 Months Unrealized Losses	0	(15)
12 Months or More Fair Value	2,810	2,780
12 Months or More Unrealized Losses	(146)	(176)
Total Fair Value	2,810	5,080
Total Unrealized Losses	(146)	(191)
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	$ 146	$ 191

Securities (Narrative) (Details

Securities (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)security	Mar. 31, 2015USD ($)
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds | $	$ 38.9	$ 57.2
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	74
Number Of Securities In Continuous Loss Position For Twelve Months or More	45
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	40
Number Of Securities In Continuous Loss Position For Twelve Months or More	20
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	2
Number Of Securities In Continuous Loss Position For Twelve Months or More	1
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number Of Securities In Continuous Loss Position For Twelve Months or More	1

Securities Securities (Summary

Securities Securities (Summary of Gross Realized Gains and Gross Realized Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities, Gross Realized Gains	$ 373	$ 730
Available-for-sale Securities, Gross Realized Losses	0	(9)
Investment securities gains, net	$ 373	$ 721

Loans (Narrative) (Details)

Loans (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)contract	Dec. 31, 2015USD ($)
Financing Receivable, Recorded Investment [Line Items]
Loans to related parties	$ 9,900	$ 10,000
Loans and Leases Receivable, Related Parties, Additions	55
Repayments on related party loans	$ 100
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract	0
Loans Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 2,210,000	2,220,000
Federal Reserve Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 50,200	$ 50,100

Loans (Analysis of Loan Portfol

Loans (Analysis of Loan Portfolio by Major Types of Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Less: unearned income on loans	$ (39,410)	$ (42,373)
Recorded Investment	5,877,283	5,815,027
Allowance for loan losses	(69,264)	(68,172)	$ (70,234)	$ (69,569)
Loans, net	5,808,019	5,746,855
Loans held for sale	3,681	4,509
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Less: unearned income on loans	(39,410)	(42,373)
Recorded Investment	5,704,082	5,634,121
Allowance for loan losses	(56,200)	(54,446)
Loans, net	5,647,882	5,579,675
Loans held for sale	3,681	4,509
Loans and Leases Receivable, Gross	5,704,082	5,634,121
Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Less: unearned income on loans	0	0
Recorded Investment	173,201	180,906
Allowance for loan losses	(13,064)	(13,726)
Loans, net	160,137	167,180
Loans held for sale	0	0
Loans and Leases Receivable, Gross	188,594	197,350
Acquisition Accounting Valuation Discount on Covered Loans	15,393	16,444
Commercial and Multifamily Residential Construction [Domain] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	1,809	1,834
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage	197,770	200,233
Loans and Leases Receivable, Gross, Consumer, Construction	135,610	138,152
Allowance for loan losses	(654)	(916)	(1,364)	(2,281)
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	175,050	176,295
Loans and Leases Receivable, Gross, Consumer, Construction	133,447	135,874
Loans and Leases Receivable, Gross	172,324	173,436
One-to-Four Family Residential [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage	22,720	23,938
Loans and Leases Receivable, Gross, Consumer, Construction	2,163	2,278
Loans and Leases Receivable, Gross	25,766	27,195
Commercial and Multifamily Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Mortgage	2,614,331	2,591,125
Loans Receivable, Gross, Commercial, Construction	185,166	169,043
Commercial and Multifamily Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Mortgage	2,520,352	2,491,736
Loans Receivable, Gross, Commercial, Construction	183,548	167,413
Commercial and Multifamily Residential [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Mortgage	93,979	99,389
Loans Receivable, Gross, Commercial, Construction	1,618	1,630
Loans and Leases Receivable, Gross	100,384	106,308
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial and Industrial	2,435,667	2,397,423
Commercial Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial and Industrial	2,401,193	2,362,575
Commercial Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial and Industrial	34,474	34,848
Loans and Leases Receivable, Gross	38,209	38,784
Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Mortgage	2,812,101	2,791,358
Real Estate Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Mortgage	2,695,402	2,668,031
Real Estate Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Mortgage	116,699	123,327
Loans and Leases Receivable, Gross	126,150	133,503
One-to-Four Family Residential Construction [Domain] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	2,200	2,326
Real Estate Construction Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Construction	320,776	307,195
Real Estate Construction Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Construction	316,995	303,287
Real Estate Construction Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Construction	3,781	3,908
Loans and Leases Receivable, Gross	4,009	4,160
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer	348,149	361,424
Allowance for loan losses	(3,368)	(3,531)	$ (2,835)	$ (3,180)
Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer	329,902	342,601
Loans and Leases Receivable, Gross	321,195	332,362
Consumer Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer	18,247	18,823
Loans and Leases Receivable, Gross	$ 20,226	$ 20,903

Loans (Analysis of Nonaccrual L

Loans (Analysis of Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	$ 36,891	$ 21,464
Unpaid Principal Balance Nonaccrual Loans	49,756	32,263
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	4,717	766
Unpaid Principal Balance Nonaccrual Loans	4,985	990
Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	22,452	9,395
Unpaid Principal Balance Nonaccrual Loans	31,039	15,688
Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	107	42
Unpaid Principal Balance Nonaccrual Loans	331	256
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	730	820
Unpaid Principal Balance Nonaccrual Loans	1,702	1,866
Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	238	349
Unpaid Principal Balance Nonaccrual Loans	247	332
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	2,897	2,843
Unpaid Principal Balance Nonaccrual Loans	3,185	3,124
Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	4,982	6,321
Unpaid Principal Balance Nonaccrual Loans	7,473	8,943
Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	205	362
Unpaid Principal Balance Nonaccrual Loans	231	385
Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	563	566
Unpaid Principal Balance Nonaccrual Loans	$ 563	$ 679

Loans (Analysis of the Aged Loa

Loans (Analysis of the Aged Loan Portfolio) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	$ 36,891	$ 21,464
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	5,654,442	5,592,208
Past Due Loans	12,749	20,449
Nonaccrual Loans	36,891	21,464
Loans Receivable, Net	5,704,082	5,634,121
Secured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	22,452	9,395
Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	2,277,121	2,241,069
Past Due Loans	4,459	12,228
Nonaccrual Loans	22,452	9,395
Loans Receivable, Net	2,304,032	2,262,692
Unsecured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	107	42
Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	91,785	94,867
Past Due Loans	684	39
Nonaccrual Loans	107	42
Loans Receivable, Net	92,576	94,948
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	730	820
One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	170,846	170,913
Past Due Loans	748	1,703
Nonaccrual Loans	730	820
Loans Receivable, Net	172,324	173,436
Commercial Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	238	349
Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	218,925	212,740
Past Due Loans	0	69
Nonaccrual Loans	238	349
Loans Receivable, Net	219,163	213,158
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	2,897	2,843
Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,321,566	1,305,502
Past Due Loans	0	2,434
Nonaccrual Loans	2,897	2,843
Loans Receivable, Net	1,324,463	1,310,779
Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	4,982	6,321
Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	946,635	939,396
Past Due Loans	4,577	599
Nonaccrual Loans	4,982	6,321
Loans Receivable, Net	956,194	946,316
Land And Acquisition [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	205	362
Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	12,915	14,388
Past Due Loans	0	0
Nonaccrual Loans	205	362
Loans Receivable, Net	13,120	14,750
Residential Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	563	566
Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	119,125	119,809
Past Due Loans	0	0
Nonaccrual Loans	563	566
Loans Receivable, Net	119,688	120,375
Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	86,584	83,634
Past Due Loans	0	0
Nonaccrual Loans	0	0
Loans Receivable, Net	86,584	83,634
Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	94,743	81,671
Past Due Loans	0	0
Nonaccrual Loans	0	0
Loans Receivable, Net	94,743	81,671
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	4,717	766
Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	314,197	328,219
Past Due Loans	2,281	3,377
Nonaccrual Loans	4,717	766
Loans Receivable, Net	321,195	332,362
Financing Receivables, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	1,113	2,147
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	311	617
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	0	0
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	62	66
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	0	684
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	0	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	740	780
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	11,636	18,302
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	4,148	11,611
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	684	39
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	686	1,637
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	69
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	0	1,750
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	4,577	599
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	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	1,541	2,597
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	$ 0	$ 0

Loans (Analysis of Impaired Loa

Loans (Analysis of Impaired Loans) (Details) - Loans, Excluding Purchased Credit Impaired Loans [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	$ 5,675,267		$ 5,618,041
Recorded Investment of Loans Individually Measured for Specific Impairment	28,815		16,080
Recorded Investment	16,939		14,726
Unpaid Principal Balance	25,584		19,547
Related Allowance	2,515		653
Average Recorded Investment Impaired Loans	22,448	$ 27,596
Interest Recognized on Impaired Loans	36	267
Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	2,285,351		2,257,168
Recorded Investment of Loans Individually Measured for Specific Impairment	18,681		5,524
Recorded Investment	11,861		690
Unpaid Principal Balance	11,996		718
Related Allowance	2,500		321
Average Recorded Investment Impaired Loans	12,103	10,698
Interest Recognized on Impaired Loans	17	7
Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	92,576		94,948
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment Impaired Loans	0	1
Interest Recognized on Impaired Loans	0	0
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	171,660		172,150
Recorded Investment of Loans Individually Measured for Specific Impairment	664		1,286
Recorded Investment	0		314
Unpaid Principal Balance	0		339
Related Allowance	0		314
Average Recorded Investment Impaired Loans	975	3,162
Interest Recognized on Impaired Loans	6	13
Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	219,163		213,158
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment Impaired Loans	0	235
Interest Recognized on Impaired Loans	0	0
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,322,410		1,308,673
Recorded Investment of Loans Individually Measured for Specific Impairment	2,053		2,106
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment Impaired Loans	2,080	4,168
Interest Recognized on Impaired Loans	3	10
Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	951,216		940,261
Recorded Investment of Loans Individually Measured for Specific Impairment	4,978		6,055
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment Impaired Loans	5,516	7,938
Interest Recognized on Impaired Loans	7	234
Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	12,810		14,283
Recorded Investment of Loans Individually Measured for Specific Impairment	310		467
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment Impaired Loans	388	544
Interest Recognized on Impaired Loans	1	1
Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	119,126		119,813
Recorded Investment of Loans Individually Measured for Specific Impairment	562		562
Recorded Investment	0		335
Unpaid Principal Balance	0		335
Related Allowance	0		3
Average Recorded Investment Impaired Loans	562	446
Interest Recognized on Impaired Loans	0	0
Income Property Multifamily Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	86,584		83,634
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Owner Occupied Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	94,743		81,671
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	319,628		332,282
Recorded Investment of Loans Individually Measured for Specific Impairment	1,567		80
Recorded Investment	15		15
Unpaid Principal Balance	15		15
Related Allowance	15		15
Average Recorded Investment Impaired Loans	824	404
Interest Recognized on Impaired Loans	2	$ 2
Impaired Loans With Recorded Allowance [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	11,876		1,354
Unpaid Principal Balance	12,011		1,407
Impaired Loans Without Recorded Allowance [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	6,820		4,834
Unpaid Principal Balance	12,314		6,455
Impaired Loans Without Recorded Allowance [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	664		972
Unpaid Principal Balance	1,093		1,397
Impaired Loans Without Recorded Allowance [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	2,053		2,106
Unpaid Principal Balance	2,257		2,311
Impaired Loans Without Recorded Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	4,978		6,055
Unpaid Principal Balance	7,390		8,528
Impaired Loans Without Recorded Allowance [Member] | Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	310		467
Unpaid Principal Balance	334		490
Impaired Loans Without Recorded Allowance [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	562		227
Unpaid Principal Balance	562		227
Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Owner Occupied Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	1,552		65
Unpaid Principal Balance	$ 1,634		$ 139

Loans Loans (Analysis of Troubl

Loans Loans (Analysis of Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)Modifications	Mar. 31, 2015USD ($)Modifications	Dec. 31, 2015USD ($)
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Additional Commitment To Lend	$ 7		$ 0
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	8	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 2,117	$ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 2,117	$ 0
Loans, Excluding Purchased Credit Impaired Loans [Member] | Secured Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	3	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,370	$ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,370	$ 0
Loans, Excluding Purchased Credit Impaired Loans [Member] | Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	1	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 250	$ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 250	$ 0
Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	4	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 497	$ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 497	$ 0

Loans Loans (Analysis of Purcha

Loans Loans (Analysis of Purchased Credit Impaired Loans - Accretable Yield Rollforward) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Loans, Analysis of Purchased Credit Impaired Loans, Accretable Yield Rollforward [Abstract]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield	$ 56,607	$ 68,726	$ 58,981	$ 73,849
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	4,229	6,319
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans	(94)	1,093
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	$ 1,761	$ 2,289

Allowance for Loan and Lease 46

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for loan and lease losses	$ 5,254	$ 1,209
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of unallocated loan amount	5.00%

Allowance for Loan and Lease 47

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Allowance for Loan and Lease Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 68,172	$ 69,569
Charged-offs	(6,905)	(6,425)
Recoveries	2,743	5,881
Provision for loan and lease losses	5,254	1,209
Ending balance	69,264	70,234
Specific Reserve	2,515	230
General Allocation	66,749	70,004
Secured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	32,321	25,923
Charged-offs	(3,770)	(1,386)
Recoveries	611	512
Provision for loan and lease losses	2,952	712
Ending balance	32,114	25,761
Specific Reserve	2,500	24
General Allocation	29,614	25,737
Unsecured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,299	927
Charged-offs	(3)	(40)
Recoveries	51	106
Provision for loan and lease losses	(47)	19
Ending balance	1,300	1,012
Specific Reserve	0	0
General Allocation	1,300	1,012
One-to-Four Family Residential [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	916	2,281
Charged-offs	0	(8)
Recoveries	41	12
Provision for loan and lease losses	(303)	(921)
Ending balance	654	1,364
Specific Reserve	0	115
General Allocation	654	1,249
Commercial Land [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,178	799
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	84	28
Ending balance	1,262	827
Specific Reserve	0	0
General Allocation	1,262	827
Income Property Multifamily [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,616	9,159
Charged-offs	0	0
Recoveries	61	3,252
Provision for loan and lease losses	725	(3,971)
Ending balance	7,402	8,440
Specific Reserve	0	0
General Allocation	7,402	8,440
Owner Occupied [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,550	5,007
Charged-offs	0	0
Recoveries	8	9
Provision for loan and lease losses	528	596
Ending balance	6,086	5,612
Specific Reserve	0	24
General Allocation	6,086	5,588
Land And Acquisition [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	339	1,197
Charged-offs	0	0
Recoveries	51	2
Provision for loan and lease losses	250	(173)
Ending balance	640	1,026
Specific Reserve	0	67
General Allocation	640	959
Residential Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	733	1,860
Charged-offs	0	0
Recoveries	203	26
Provision for loan and lease losses	513	(96)
Ending balance	1,449	1,790
Specific Reserve	0	0
General Allocation	1,449	1,790
Income Property Multifamily Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	388	622
Charged-offs	0	0
Recoveries	1	3
Provision for loan and lease losses	326	202
Ending balance	715	827
Specific Reserve	0	0
General Allocation	715	827
Owner Occupied Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,006	434
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	204	65
Ending balance	1,210	499
Specific Reserve	0	0
General Allocation	1,210	499
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,531	3,180
Charged-offs	(266)	(891)
Recoveries	165	273
Provision for loan and lease losses	(62)	273
Ending balance	3,368	2,835
Specific Reserve	15	0
General Allocation	3,353	2,835
Purchased Credit Impaired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	13,726	16,336
Charged-offs	(2,866)	(4,100)
Recoveries	1,551	1,686
Provision for loan and lease losses	653	2,609
Ending balance	13,064	16,531
Specific Reserve	0	0
General Allocation	13,064	16,531
Unallocated Financing Receivables [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	569	1,844
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	(569)	1,866
Ending balance	0	3,710
Specific Reserve	0	0
General Allocation	$ 0	$ 3,710

Allowance for Loan and Lease 48

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Changes in the Allowance for Unfunded Commitments and Letters of Credit) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit
Beginning balance	$ 2,930	$ 2,655
Allowance for Loan and Lease Losses, Net Changes In Unfunded Commitments and Letters Of Credit Allowance	0	0
Ending balance	$ 2,930	$ 2,655

Allowance for Loan and Lease 49

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Analysis of Credit Quality of the Loan Portfolio) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	$ 69,264	$ 68,172	$ 70,234	$ 69,569
Loans, net	5,808,019	5,746,855
Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	5,704,082	5,634,121
Less: allowance for loan and lease losses	56,200	54,446
Loans, net	5,647,882	5,579,675
Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	188,594	197,350
Acquisition Accounting Valuation Discount on Purchased Credit Impaired Loans	15,393	16,444
Less: allowance for loan and lease losses	13,064	13,726
Loans, net	160,137	167,180
Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	5,523,950	5,461,639
Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	173,557	178,904
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	74,871	80,599
Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	99	362
Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	105,261	91,883
Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	14,938	18,084
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	32,114	32,321	25,761	25,923
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	2,304,032	2,262,692
Secured Loans [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	37,102	37,564
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	2,185,283	2,146,729
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	31,706	31,468
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	54,957	59,746
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	99	101
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	63,792	56,217
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	5,297	5,995
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	1,300	1,299	1,012	927
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	92,576	94,948
Unsecured Loans [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,107	1,220
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	91,737	93,347
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	1,106	1,218
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	277	278
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	562	1,323
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	1	2
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	654	916	1,364	2,281
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	172,324	173,436
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	25,766	27,195
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	170,788	171,945
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	23,766	25,018
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	461	52
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	1,075	1,439
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	2,000	2,177
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	1,262	1,178	827	799
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	219,163	213,158
Commercial Land [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	8,660	8,898
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	213,936	207,768
Commercial Land [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	8,037	8,234
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	4,804	4,966
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	423	424
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	623	664
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	7,402	6,616	8,440	9,159
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	1,324,463	1,310,779
Income Property Multifamily [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	37,528	42,342
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	1,306,718	1,296,043
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	33,558	36,426
Income Property Multifamily [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	6,394	5,889
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	11,351	8,847
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	3,970	5,916
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	6,086	5,550	5,612	5,007
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	956,194	946,316
Owner Occupied [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	54,196	55,068
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	933,090	918,986
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	52,487	53,071
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	7,978	9,668
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	261
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	15,126	17,662
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	1,709	1,736
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	640	339	1,026	1,197
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	13,120	14,750
Land And Acquisition [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,458	1,565
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	12,915	14,388
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	1,143	1,086
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	205	362
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	315	479
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	1,449	733	1,790	1,860
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	119,688	120,375
Residential Construction [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	742	761
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	118,843	119,243
Residential Construction [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	414	427
Residential Construction [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	845	1,132
Residential Construction [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	328	334
Residential Construction [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Residential Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Income Property Multifamily Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan and lease losses	715	388	827	622
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	86,584	83,634
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	1,283	1,303
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	86,584	83,634
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	1,283	1,303
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	1,210	1,006	499	434
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	94,743	81,671
Owner Occupied Construction [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	526	531
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	90,807	81,270
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	526	531
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	0
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	3,936	401
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	3,368	3,531	$ 2,835	$ 3,180
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	321,195	332,362
Consumer Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	20,226	20,903
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	313,249	328,286
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	19,531	20,122
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	0	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	7,946	4,076
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	695	781
Consumer Portfolio Segment [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Consumer Portfolio Segment [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0	0
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	$ 0	$ 0

Other Real Estate Owned (Summar

Other Real Estate Owned (Summary of Other Real Estate Owned) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other Real Estate Owned [Line Items]
Balance, beginning of period	$ 13,738	$ 22,190
Transfers in	105	4,692
Valuation adjustments	(137)	(197)
Proceeds from Sale of OREO Property	1,326	5,122
Gain on sale of OREO, net	47	1,736
Total OREO, end of period	12,427	$ 23,299
Mortgage Loans in Process of Foreclosure, Amount	1,300
One-to-Four Family Residential [Member]
Other Real Estate Owned [Line Items]
Total OREO, end of period	$ 2,200

Covered Assets and FDIC Loss-51

Covered Assets and FDIC Loss-sharing Asset (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Amount of Estimated Clawback Liability	$ 5,418
Payment Of Clawback If Losses Less Than Stated Levels, Period After Acquisition	10 years 45 days
Federal deposit insurance corporation loss-sharing indemnified assets	$ 4,600
Federal deposit insurance corporation loss-sharing indemnified assets receivable	$ 1,400
Maximum [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Loss Sharing Agreement Effective Years	10 years
Loss Recovery Provision Effective Years	10 years
Minimum [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Loss Sharing Agreement Effective Years	5 years
Loss Recovery Provision Effective Years	8 years
Covered Loans [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Percentage of loss shared by FDIC	80.00%
FDIC Percentage Of Loss Recoveries	80.00%
Percentage of loss shared by FDIC When Loss Share Thresholds Met	95.00%
Percentage Of Loss Recoveries Shared By FDIC When Loss Share Thresholds Met	95.00%

Covered Assets and FDIC Loss-52

Covered Assets and FDIC Loss-sharing Asset (FDIC Loss-sharing Asset) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at beginning of period	$ 6,568	$ 15,174
Cash (received from) paid to the FDIC, net	(353)	(659)
FDIC reimbursable losses, net	136	(21)
Amortization, net	(1,332)	(2,294)
Loan impairment	147	1,532
Sale of other real estate	(144)	(420)
Write-downs of other real estate	18	1,071
Other	80	(261)
Balance at end of period	5,954	$ 14,644
Amount of Estimated Clawback Liability	5,418
Non-Single Family Covered Assets	101,163
Single Family Covered Assets	38,106
Columbia River Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	537
Amount of Estimated Clawback Liability	3,420
Non-Single Family Covered Assets	66,682
Single Family Covered Assets	7,764
American Marine Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	2,404
Amount of Estimated Clawback Liability	1,264
Non-Single Family Covered Assets	11,321
Single Family Covered Assets	22,561
Summit Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	1,799
Amount of Estimated Clawback Liability	0
Non-Single Family Covered Assets	8,381
Single Family Covered Assets	6,046
First Heritage Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	1,214
Amount of Estimated Clawback Liability	734
Non-Single Family Covered Assets	14,779
Single Family Covered Assets	$ 1,735

Goodwill and Intangible Asset53

Goodwill and Intangible Assets (Schedule of Goodwill and Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets [Roll Forward]
Total goodwill, beginning of period	$ 382,762
Total goodwill, end of period	382,762	$ 382,537
CDI current period amortization	(1,583)	(1,817)
Indefinite-Lived Intangible Assets (Excluding Goodwill)	919	919
Other intangible assets, net	21,994	28,642	$ 23,577
Total goodwill and intangible assets, end of period	$ 404,756	411,179
Core Deposits [Member]
Goodwill and Intangible Assets [Line Items]
Estimated life of CDI, in years	10 years
Goodwill and Intangible Assets [Roll Forward]
Gross core deposit intangible balance, beginning of period			58,598	$ 58,598
Accumulated amortization at beginning of period			$ (35,940)	$ (29,058)
Core deposit intangible, net, beginning of period	$ 22,658	29,540
CDI current period amortization	(1,583)	(1,817)
Total core deposit intangible, end of period	$ 21,075	$ 27,723

Goodwill and Intangible Asset54

Goodwill and Intangible Assets (Estimated Future Amortization Expense of Core Deposit Intangibles) (Details) $ in Thousands	Mar. 31, 2016USD ($)
Future Amortization Expense For Core Deposit Intangibles
2,015	$ 4,363
2,016	4,913
2,017	3,855
2,018	2,951
2,019	$ 2,048

Derivatives and Balance Sheet55

Derivatives and Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Derivative [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ 8	$ (5)
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	73,839
Secured Borrowings, Gross, Difference, Amount	0
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	73,839
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	48,839
Maturity Less than 30 Days [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	0
Maturity 30 to 90 Days [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	0
Maturity Greater than 90 Days [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	25,000
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	267,500		$ 264,400
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of asset derivative instruments	18,641		12,438
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of liability derivative instruments	$ 18,689		$ 12,478

Derivatives and Balance Sheet56

Derivatives and Balance Sheet Offsetting Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Balance Sheet Offsetting [Line Items]
Repurchase agreements, amounts offset in balance sheet	$ 0	$ 0
Repurchase agreements, net amount presented in statement of financial position	73,839	99,699
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	(73,839)	(99,699)
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	18,641	12,438
Derivative, Collateral, Obligation to Return Securities	0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	18,641	12,438
Derivative Liability, Gross Amounts Offset in Balance Sheets	0	0
Derivative Liability	18,689	12,478
Derivative, Collateral, Right to Reclaim Securities	(18,689)	(12,478)
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	73,839	99,699
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member] | Other Assets [Member]
Balance Sheet Offsetting [Line Items]
Fair value of asset derivative instruments	18,641	12,438
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member] | Other Liabilities [Member]
Balance Sheet Offsetting [Line Items]
Fair value of liability derivative instruments	$ 18,689	$ 12,478

Commitments and Contingent Li57

Commitments and Contingent Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Commitments to Extend Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 1,960	$ 1,930
Standby Letters of Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	46.9	38.7
Commercial Letter of Credit and other off-balance sheet liabilities [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 5.6	$ 5

Shareholders' Equity (Details)

Shareholders' Equity (Details) - $ / shares	Apr. 27, 2016	Jan. 28, 2016	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Subsequent Event [Line Items]
Declared quarterly cash dividend		$ 0.18
Special Dividends Payable, Amount Per Share		$ 0.20
Dividend Declared [Member]
Subsequent Event [Line Items]
Declared quarterly cash dividend	$ 0.19
Special Dividends Payable, Amount Per Share	$ 0.18
Preferred Stock [Member]
Subsequent Event [Line Items]
Stock Issued During Period, Shares, New Issues			8,782	8,782	8,782	8,782

Shareholders' Equity Narrative

Shareholders' Equity Narrative (Details)	Mar. 31, 2016shares
Shareholders' Equity [Abstract]
Preferred Stock Converted Into Common Stock, Shares	102,363

Accumulated Other Comprehensi60

Accumulated Other Comprehensive Income (Changes in AOCI by Component) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	[1]	$ (6,295)	$ 5,621
Other comprehensive income before reclassifications	[1]	18,770	9,096
Amounts reclassified from accumulated other comprehensive income (loss) (2)	[1]	(132)	(431)
Net current-period other comprehensive income	[1]	18,638	8,665
Ending balance	[1]	12,343	14,286
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	[1]	386	7,462
Other comprehensive income before reclassifications	[1]	18,770	9,376
Amounts reclassified from accumulated other comprehensive income (loss) (2)	[1]	(238)	(459)
Net current-period other comprehensive income	[1]	18,532	8,917
Ending balance	[1]	18,918	16,379
Unrealized Gains and Losses on Pension Plan Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	[1]	(6,681)	(1,841)
Other comprehensive income before reclassifications	[1]	0	(280)
Amounts reclassified from accumulated other comprehensive income (loss) (2)	[1]	106	28
Net current-period other comprehensive income	[1]	106	(252)
Ending balance	[1]	$ (6,575)	$ (2,093)
[1]	All amounts are net of tax. Amounts in parenthesis indicate debits.

Accumulated Other Comprehensi61

Accumulated Other Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains, net	$ 373	$ 721
Compensation and employee benefits	36,319	39,100
Total before tax	30,488	35,188
Income tax provision	(9,229)	(10,827)
Net income	21,259	24,361
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	373	721
Total before tax	373	721
Income tax provision	(135)	(262)
Net income	238	459
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	(167)	(44)
Total before tax	(167)	(44)
Income tax provision	61	16
Net income	$ (106)	$ (28)

Fair Value Accounting and Mea62

Fair Value Accounting and Measurement (Financial Assets And Liabilities Accounted for Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 2,186,166	$ 2,157,694
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	$ 2,186,166	2,157,694
Other assets (Interest rate contracts)	18,641	12,438
Other liabilities (Interest rate contracts)	18,689	12,478
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	547	20,137
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	2,185,619	2,137,557
Other assets (Interest rate contracts)	18,641	12,438
Other liabilities (Interest rate contracts)	18,689	12,478
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	1,330,100	1,286,489
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	1,330,100	1,286,489
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	491,387	492,169
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	491,387	492,169
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	358,941	353,782
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	358,941	353,782
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	547	20,137
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	547	20,137
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	5,191	5,117
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	5,191	5,117
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 Mea63

Fair Value Accounting and Measurement (Financial Assets Accounted For Fair Value On Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 10,681
Fair Value, Option, Changes in Fair Value, Gain (Loss)	2,813	$ 197
OREO	2,553	1,429
Assets, Fair Value Disclosure	13,234	1,429
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0
OREO	0	0
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0
OREO	0	0
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	10,681
OREO	2,553	1,429
Assets, Fair Value Disclosure	13,234	1,429
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	2,676
Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 137	$ 197

Fair Value Accounting and Mea64

Fair Value Accounting and Measurement (Quantitative Information About Level 3 Fair Value Measurements) (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016		Mar. 31, 2015
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans		$ 10,681
OREO		2,553		$ 1,429
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans		10,681
OREO		2,553		$ 1,429
Real Estate Collateral [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans		$ 10,681
Other Collateral [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	[1]	0.00%	[2]	0.00%
Other Collateral [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	[1]	7.00%	[2]	0.00%
Other Collateral [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	[1],[2]	6.00%		0.00%
[1]	Discount applied to appraisal value, letter of intent to purchase, or stated value (in the case of accounts receivable and inventory).
[2]	Other collateral consists of accounts receivable and inventory.

Fair Value Accounting and Mea65

Fair Value Accounting and Measurement (Carrying Amounts and Estimated Fair Values of Selected Financial Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets
Interest-earning deposits with banks	$ 38,248	$ 8,373
Securities available for sale	2,186,166	2,157,694
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Assets
Cash and due from banks	150,683	166,929
Interest-earning deposits with banks	38,248	8,373
Securities available for sale	2,186,166	2,157,694
FHLB stock	10,241	12,722
Loans held for sale	3,681	4,509
Loans	5,808,019	5,746,855
FDIC loss-sharing asset	5,954	6,568
Interest rate contracts	18,641	12,438
Liabilities
Deposits	7,596,949	7,438,829
FHLB Advances	6,521	68,531
Repurchase agreements	73,839	99,699
Interest rate contracts	18,689	12,478
Estimate of Fair Value, Fair Value Disclosure [Member]
Assets
Cash and due from banks	150,683	166,929
Interest-earning deposits with banks	38,248	8,373
Securities available for sale	2,186,166	2,157,694
FHLB stock	10,241	12,722
Loans held for sale	3,681	4,509
Loans	5,889,840	5,752,423
FDIC loss-sharing asset	1,613	921
Interest rate contracts	18,641	12,438
Liabilities
Deposits	7,593,830	7,434,787
FHLB Advances	7,459	69,176
Repurchase agreements	74,353	100,346
Interest rate contracts	18,689	12,478
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets
Cash and due from banks	150,683	166,929
Interest-earning deposits with banks	38,248	8,373
Securities available for sale	547	20,137
FHLB stock	0	0
Loans held for sale	0	0
Loans	0	0
FDIC loss-sharing asset	0	0
Interest rate contracts	0	0
Liabilities
Deposits	7,162,893	6,979,924
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	2,185,619	2,137,557
FHLB stock	10,241	12,722
Loans held for sale	3,681	4,509
Loans	0	0
FDIC loss-sharing asset	0	0
Interest rate contracts	18,641	12,438
Liabilities
Deposits	430,937	454,863
FHLB Advances	7,459	69,176
Repurchase agreements	74,353	100,346
Interest rate contracts	18,689	12,478
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	5,889,840	5,752,423
FDIC loss-sharing asset	1,613	921
Interest rate contracts	0	0
Liabilities
Deposits	0	0
FHLB Advances	0	0
Repurchase agreements	0	0
Interest rate contracts	$ 0	$ 0

Earnings per Common Share (Deta

Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income		$ 21,259	$ 24,361
Earnings allocated to participating securities - preferred shares		39	43
Earnings allocated to participating securities - nonvested restricted shares		247	225
Earnings allocated to common shareholders, Basic		$ 20,973	$ 24,093
Weighted average common shares outstanding		57,114	56,965
Basic earnings per common share		$ 0.37	$ 0.42
Earnings allocated to common shareholders, Diluted	[1]	$ 20,973	$ 24,093
Dilutive effect of equity awards and warrants		11	13
Weighted average diluted common shares outstanding		57,125	56,978
Diluted earnings per common share		$ 0.37	$ 0.42
Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive.		27	53
[1]	Earnings allocated to common shareholders for basic and diluted EPS may differ under the two-class method as a result of adding common stock equivalents for options and warrants to dilutive shares outstanding, which alters the ratio used to allocate earnings to common shareholders and participating securities for the purposes of calculating diluted EPS.