Columbia Banking System (COLB) 10-Q 9 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 30, 2014
Document Information [Line Items]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Mar-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Entity Registrant Name	'COLUMBIA BANKING SYSTEM INC	'
Entity Central Index Key	'0000887343	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	52,599,634

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS	'		'
Cash and due from banks	$191,706		$165,030
Interest-earning deposits with banks	45,083		14,531
Total cash and cash equivalents	236,789		179,561
Securities available for sale at fair value (amortized cost of $1,644,805 and $1,680,491, respectively)	1,639,370		1,664,111
Federal Home Loan Bank stock at cost	32,224		32,529
Loans held for sale	0		735
Loans, net	4,506,792		4,444,842
FDIC loss sharing asset	36,837		39,846
Interest receivable	23,600		22,206
Premises and equipment, net	156,836		154,732
Other real estate owned ($14,712 and $12,093 covered by FDIC loss share, respectively)	30,552		35,927
Goodwill	343,952		343,952
Intangible Assets, Net (Excluding Goodwill)	24,273		25,852
Other assets	205,828		217,289
Total Assets	7,237,053		7,161,582
LIABILITIES AND SHAREHOLDERS' EQUITY	'		'
Noninterest-bearing	2,225,212		2,171,703
Interest-bearing	3,819,204		3,787,772
Total deposits	6,044,416		5,959,475
Federal Home Loan Bank advances	6,597		36,606
Securities sold under agreements to repurchase	25,000		25,000
Other liabilities	86,549		87,252
Total liabilities	6,162,562		6,108,333
Commitments and contingent liabilities	'		'
Preferred Stock, Shares Authorized	2,000		2,000
Preferred Stock, Shares Issued	9		9
Preferred Stock, Value, Issued	2,217		2,217
Shareholders' equity:	'		'
Authorized shares	63,033		63,033
Common Stock Shares Issued And Outstanding	52,600		51,265
Common Stock (no par value)	861,125		860,562
Retained earnings	216,192		202,514
Accumulated other comprehensive income	-5,043	[1]	-12,044	[1]
Total shareholders' equity	1,074,491		1,053,249
Total Liabilities and Shareholders' Equity	7,237,053		7,161,582
Noncovered Loans [Member]	'		'
ASSETS	'		'
Loans held for sale	0		735
Loans, excluding covered loans, net of unearned income of ($62,724) and ($68,282), respectively	4,297,076		4,219,451
Loans and Leases Receivable, Allowance	50,442		52,280
Loans, net	4,246,634		4,167,171
Other real estate owned ($14,712 and $12,093 covered by FDIC loss share, respectively)	15,840		23,834
Covered Loans [Member]	'		'
ASSETS	'		'
Loans and Leases Receivable, Allowance	20,129		20,174
Loans, net	260,158		277,671
Other real estate owned ($14,712 and $12,093 covered by FDIC loss share, respectively)	$14,712		$12,093
[1]	All amounts are net of tax. Amounts in parenthesis indicate debits.

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Securities available-for-sale, amortized cost	$1,644,805	$1,680,491
Less: Unearned income on loans	-62,724	-68,282
Other real estate owned covered by FDIC loss share	30,552	35,927
Common stock, par value	'	'
Common stock, shares authorized	63,033	63,033
Common stock, shares outstanding	52,600	51,265
Covered Loans [Member]	'	'
Allowance for losses on covered loans	-20,129	-20,174
Other real estate owned covered by FDIC loss share	$14,712	$12,093

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Net of tax	$19,844		$12,176
Unrealized gain from securities:	'		'
Net unrealized holding loss from available for sale securities arising during the period	7,119		-2,493
Reclassification adjustment of net gain from sale of available for sale securities included in income	-142		-240
Net unrealized gain from securities, net of reclassification adjustment	6,977		-2,733
Pension plan liability adjustment:	'		'
Unrecognized net actuarial gain (loss) during the period	0		-757
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost	24		60
Pension plan liability adjustment, net	24		-697
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	7,001	[1]	-3,430	[1]
Total comprehensive income	$26,845		$8,746
[1]	All amounts are net of tax. Amounts in parenthesis indicate debits.

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Interest Income	'	'
Loans	$65,541	$48,028
Taxable securities	6,752	4,234
Tax-exempt securities	2,618	2,298
Federal funds sold and deposits in banks	14	201
Total interest income	74,925	54,761
Interest Expense	'	'
Deposits	752	1,089
Federal Home Loan Bank advances	114	71
Other borrowings	119	119
Total interest expense	985	1,279
Net Interest Income	73,940	53,482
Provision for loan and lease losses	1,922	-20
Net interest income after provision for loan and lease losses	72,018	53,502
Noninterest Income (Loss)	'	'
Service charges and other fees	12,936	7,594
Merchant services fees	1,870	1,851
Investment securities gains, net	223	370
Bank owned life insurance	965	698
Change in FDIC loss sharing asset	-4,819	-10,483
Other	2,833	1,628
Total noninterest income (loss)	14,008	1,658
Noninterest Expense	'	'
Compensation and employee benefits	31,338	21,653
Occupancy	8,244	4,753
Merchant processing	980	857
Advertising and promotion	769	870
Data processing and communications	3,520	2,580
Legal and professional fees	2,169	2,050
Taxes, licenses and fees	1,180	1,387
Regulatory premiums	1,176	857
Net cost (benefit) of operation of other real estate owned	146	-2,501
Amortization of intangibles	1,580	1,029
Other	6,284	4,514
Total noninterest expense	57,386	38,049
Income before income taxes	28,640	17,111
Income tax provision	8,796	4,935
Net Income	19,844	12,176
Earnings per common share	'	'
Basic ($ per share)	$0.38	$0.31
Diluted ($ per share)	$0.37	$0.31
Dividends paid per common share	$0.12	$0.10
Weighted average number of common shares outstanding	51,097	39,348
Weighted average number of diluted common shares outstanding	52,433	39,351
Noncovered Loans [Member]	'	'
Interest Expense	'	'
Provision for loan and lease losses	-500	-1,000
Covered Loans [Member]	'	'
Interest Expense	'	'
Provision for loan and lease losses	$2,422	$980

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax	($4,049)	$1,357
Reclassification adjustment of net gain from sale of available for sale securities included in income, tax	81	130
Net unrealized gain from unfunded defined benefit plan liability arising during the period, tax	0	412
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax	($13)	($32)

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Shareholders' Equity (USD $)	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Series B Preferred Stock [Member]
In Thousands
Balance, value at Dec. 31, 2012	$764,008	$581,471	$162,388	$20,149	$0
Balance, shares at Dec. 31, 2012	'	39,686	'	'	0
Net Income	12,176	'	12,176	'	'
Other comprehensive income	-3,430	'	'	-3,430	'
Issuance of common stock - stock option and other plans, value	326	326	'	'	'
Issuance of common stock - stock option and other plans, shares	'	18	'	'	'
Issuance of common stock - restricted stock awards, net of cancelled awards, value	551	551	'	'	'
Issuance of common stock - restricted stock awards, net of cancelled awards, shares	'	140	'	'	'
Cash dividends paid on common stock	3,971	'	3,971	'	'
Balance, value at Mar. 31, 2013	769,660	582,348	170,593	16,719	0
Balance, shares at Mar. 31, 2013	'	39,844	'	'	0
Balance, value at Dec. 31, 2013	1,053,249	860,562	202,514	-12,044	2,217
Balance, shares at Dec. 31, 2013	'	51,265	'	'	9
Net Income	19,844	'	19,844	'	'
Other comprehensive income	7,001	'	'	7,001	'
Issuance of common stock - cashless exercise of warrants, shares	'	1,140	'	'	'
Issuance of common stock - cashless exercise of warrants, value	0	0	'	'	'
Issuance of common stock - stock option and other plans, value	405	405	'	'	'
Issuance of common stock - stock option and other plans, shares	'	19	'	'	'
Issuance of common stock - restricted stock awards, net of cancelled awards, value	680	680	'	'	'
Issuance of common stock - restricted stock awards, net of cancelled awards, shares	'	197	'	'	'
Stock Repurchased During Period, Shares	'	-21	'	'	'
Stock Repurchased and Retired During Period, Value	-522	-522	'	'	'
Dividends, Preferred Stock, Cash	-12	'	'	'	'
Cash dividends paid on common stock	6,154	'	6,154	'	'
Balance, value at Mar. 31, 2014	$1,074,491	$861,125	$216,192	($5,043)	$2,217
Balance, shares at Mar. 31, 2014	'	52,600	'	'	9

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash Flows From Operating Activities	'	'
Net Income	$19,844	$12,176
Adjustments to reconcile net income to net cash provided by operating activities	'	'
Provision for loan and lease losses and losses on covered loans	1,922	-20
Stock-based compensation expense	680	551
Depreciation, amortization and accretion	8,972	13,015
Net realized gain on sale of securities	223	370
Net realized gain on sale of other assets	8	-80
Net realized (gain) loss on sale of other real estate owned	-1,659	-2,787
Write-down on other real estate owned	1,580	158
Net change in:	'	'
Loans held for sale	735	1,675
Interest receivable	-1,394	-2,053
Interest payable	-13	-40
Other assets	5,714	3,192
Other liabilities	-649	-11,739
Net cash provided by operating activities	35,517	13,678
Cash Flows From Investing Activities	'	'
Loans originated and acquired, net of principal collected	64,065	71,815
Purchases of securities available for sale	-10,787	-84,673
Purchases of premises and equipment	-4,930	-3,624
Proceeds from FDIC reimbursement on loss-sharing asset	539	3,692
Proceeds from sales of securities available for sale	6,441	3,023
Proceeds from principal repayments and maturities of securities available for sale	36,530	64,758
Proceeds from Sales of Assets, Investing Activities	337	287
Proceeds from sales of covered other real estate owned	3,103	6,438
Proceeds from sales of other real estate and other personal property owned	8,102	2,019
Payment to FDIC Related to Loss-Sharing Asset	-2,217	-573
Net cash provided by (used in) investing activities	-26,947	-80,468
Cash Flows From Financing Activities	'	'
Net increase (decrease) in deposits	84,941	4,454
Proceeds from Federal Home Loan Bank advances	587,000	100
Proceeds from Federal Reserve Bank borrowings	50	50
Proceeds from exercise of stock options	405	326
Repayment of Federal Home Loan Bank advances	-617,000	-100
Repayment of Federal Reserve Bank borrowings	-50	-50
Payment of common stock dividends	-6,154	-3,971
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	-12	0
Purchase and retirement of common stock	522	0
Net cash used by financing activities	48,658	809
Increase (Decrease) in cash and cash equivalents	57,228	-65,981
Cash and cash equivalents at beginning of period	179,561	513,926
Cash and cash equivalents at end of period	236,789	447,945
Non-cash investing activities	'	'
Loans transferred to other real estate owned	5,751	4,114
Cash paid for interest	999	1,319
Cash paid for income tax	$10	$5,500

Basis_of_Presentation_and_Sign

Basis of Presentation and Significant Accounting Policies	3 Months Ended
	Mar. 31, 2014
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 the Company and its subsidiaries, including its wholly owned banking subsidiary Columbia Bank (the “Bank”) and West Coast 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, 2014 are not necessarily indicative of results to be anticipated for the year ending December 31, 2014. The accompanying interim unaudited consolidated financial statements should be read in conjunction with the financial statements and related notes contained in the Company’s 2013 Annual Report on Form 10-K.
	Significant Accounting Policies
	The significant accounting policies used in preparation of our consolidated financial statements are disclosed in our 2013 Annual Report on Form 10-K. There have not been any changes in our significant accounting policies compared to those contained in our 2013 Form 10-K disclosure for the year ended December 31, 2013.

Accounting_Pronouncements_Rece

Accounting Pronouncements Recently Issued	3 Months Ended
	Mar. 31, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
Accounting Pronouncements Recently Issued	'
	Accounting Pronouncements Recently Issued
	In April 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. ASU 2014-08 raises the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other disposals that do not meet the definition of a discontinued operation. It is effective for annual periods beginning on or after December 15, 2014. Early adoption is permitted but only for disposals that have not been reported in financial statements previously issued. The Company is assessing the impact of the new guidance on its consolidated financial statements.
	In January 2014, the FASB issued ASU 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans Upon Foreclosure. The Update clarifies when a creditor would be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan such that all or a portion of the loan would be derecognized and the real estate property recognized. Under the guidance, a consumer loan collateralized by residential real estate should be reclassified to other real estate owned when (1) the creditor obtains legal title to the residential property or (2) the borrower conveys all interest in the property to the creditor to satisfy the loan by completing a deed in lieu of foreclosure or similar agreement. In addition, an entity is required to disclose the amount of residential real estate meeting the conditions above, and the recorded investment in consumer mortgage loans secured by residential real estate that are in the process of foreclosure. ASU 2014-04 is effective for annual and interim reporting periods within those annual periods, beginning after December 15, 2014. Adoption of the new guidance is not expected to have a significant impact on the Company's consolidated financial statements.
	In January 2014, the FASB issued ASU No. 2014-01, Accounting for Investments in Qualified Affordable Housing Projects. The Update provides guidance on accounting for investments by a reporting entity in flow-through limited liability entities that manage or invest in affordable housing projects that qualify for the low-income housing tax credit. Under the proportional amortization method, the cost of the investment is amortized each reporting period in proportion to the tax credits received. Under the new guidance, classification of the amortization would change from noninterest expense to income tax expense. ASU 2014-01 is effective for annual and interim reporting periods within those annual periods, beginning after December 15, 2014. The guidance is to be applied retrospectively to all periods presented. The Company is assessing the impact of the new guidance on its consolidated financial statements.
	In July 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. The Update clarifies when it is appropriate for an unrecognized tax benefit, or a portion of an unrecognized tax benefit, to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. This new guidance was adopted on January 1, 2014 and did not have an impact on the Company's consolidated financial statements.

Business_combinations

Business combinations	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Business Combination Disclosure [Text Block]	'
	Business Combinations
	On April 1, 2013, the Company completed its acquisition of West Coast Bancorp ("West Coast"). The Company paid $540.8 million in total consideration to acquire 100% of the voting equity interests of West Coast. The primary reason for the acquisition was to expand the Company's geographic footprint consistent with its ongoing growth strategy. The fair value of the net assets acquired totaled $312.4 million, including $1.88 billion of deposits, $1.41 billion of loans and $15.3 million of other intangible assets. Goodwill of $228.4 million was recorded as part of the acquisition. The goodwill is not deductible for income tax purposes. In connection with the West Coast acquisition, Columbia recognized $966 thousand and $723 thousand of acquisition-related expenses for the three month periods ended March 31, 2014 and 2013, respectively.
	See Note 2, Business Combinations, in Item 8 of our 2013 Form 10-K for additional details related to the West Coast acquisition.

Securities

Securities	3 Months Ended
	Mar. 31, 2014
Available-for-sale Securities [Abstract]	'
Securities	'
	Securities
	The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of securities available for sale:
		Amortized		Gross			Gross			Fair Value
		Cost		Unrealized			Unrealized
				Gains			Losses
		(in thousands)
	March 31, 2014
	U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	919,299	$	10,339		$	(17,340	)	$	912,298
	State and municipal securities	363,983		12,472			(2,775		)	373,680
	U.S. government agency and government-sponsored enterprise securities	335,151		477			(7,642		)	327,986
	U.S. government securities	21,088		1			(786		)	20,303
	Other securities	5,284		25			(206		)	5,103
	Total	$	1,644,805	$	23,314		$	(28,749	)	$	1,639,370
	December 31, 2013
	U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	961,442	$	10,640		$	(23,674	)	$	948,408
	State and municipal securities	357,013		11,450			(3,993		)	364,470
	U.S. government agency and government-sponsored enterprise securities	335,671		434			(10,066		)	326,039
	U.S. government securities	21,081		—			(967		)	20,114
	Other securities	5,284		27			(231		)	5,080
	Total	$	1,680,491	$	22,551		$	(38,931	)	$	1,664,111
	The scheduled contractual maturities of investment securities available for sale at March 31, 2014 are presented as follows:
		March 31, 2014
		Amortized Cost		Fair Value
		(in thousands)
	Due within one year	$	23,252	$	23,415
	Due after one year through five years	337,507		336,477
	Due after five years through ten years	434,217		431,506
	Due after ten years	844,545		842,869
	Other securities with no stated maturity	5,284		5,103
	Total investment securities available-for-sale	$	1,644,805	$	1,639,370
	The following table summarizes, as of March 31, 2014, the carrying value of securities pledged as collateral to secure public deposits, borrowings and other purposes as permitted or required by law:
		Carrying Amount
		(in thousands)
	Washington and Oregon State to secure public deposits	$	278,061
	Federal Reserve Bank to secure borrowings	42,631
	Other securities pledged	43,038
	Total securities pledged as collateral	$	363,730
	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, 2014 and December 31, 2013:
		Less than 12 Months					12 Months or More						Total
		Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
		Value		Losses			Value			Losses			Value		Losses
		(in thousands)
	March 31, 2014
	U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	399,830	$	(7,290	)	$	112,690		$	(10,050	)	$	512,520	$	(17,340	)
	State and municipal securities	88,065		(1,791		)	17,748			(984		)	105,813		(2,775		)
	U.S. government agency and government-sponsored enterprise securities	251,196		(6,026		)	28,810			(1,616		)	280,006		(7,642		)
	U.S. government securities	19,253		(786		)	—			—			19,253		(786		)
	Other securities	2,270		(45		)	2,795			(161		)	5,065		(206		)
	Total	$	760,614	$	(15,938	)	$	162,043		$	(12,811	)	$	922,657	$	(28,749	)
	December 31, 2013
	U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	492,921	$	(10,991	)	$	121,303		$	(12,684	)	$	614,224	$	(23,675	)
	State and municipal securities	112,400		(3,069		)	13,815			(923		)	126,215		(3,992		)
	U.S. government agency and government-sponsored enterprise securities	260,001		(8,063		)	28,447			(2,003		)	288,448		(10,066		)
	U.S. government securities	20,114		(967		)	—			—			20,114		(967		)
	Other securities	2,257		(58		)	2,783			(173		)	5,040		(231		)
	Total	$	887,693	$	(23,148	)	$	166,348		$	(15,783	)	$	1,054,041	$	(38,931	)
	At March 31, 2014, there were 70 U.S. government agency and government-sponsored enterprise mortgage-backed securities & collateralized mortgage obligations securities in an unrealized loss position, of which ten 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, 2014.
	At March 31, 2014, there were 113 state and municipal government securities in an unrealized loss position, of which 13 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, 2014, 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, 2014.
	At March 31, 2014, there were 29 U.S. government agency and government-sponsored enterprise securities in an unrealized loss position, three of which were in a continuous loss position for 12 months or more. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not currently intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be maturity, the Company does not consider these investments to be other-than-temporarily impaired at March 31, 2014.
	At March 31, 2014, there were three U.S. government securities in an unrealized loss position, none of which were in a continuous loss position for 12 months or more. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not currently intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be maturity, the Company does not consider these investments to be other-than-temporarily impaired at March 31, 2014.
	At March 31, 2014, there were two other securities in an unrealized loss position, of which one security, a mortgage-backed securities fund, 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, 2014 as it has the intent and ability to hold the investment for sufficient time to allow for recovery in the market value.

Noncovered_Loans

Noncovered Loans	3 Months Ended
	Mar. 31, 2014
Noncovered Loans [Abstract]	'
Noncovered Loans	'
	Noncovered Loans
	Noncovered loans include loans originated through our branch network and loan departments as well as acquired loans that are not subject to FDIC loss-sharing agreements.
	The following is an analysis of the noncovered loan portfolio by major types of loans (net of unearned income):
		March 31,				December 31,
		2014				2013
	Noncovered loans:	(in thousands)
	Commercial business	$	1,601,676			$	1,561,782
	Real estate:
	One-to-four family residential	105,141				108,317
	Commercial and multifamily residential	2,113,609				2,080,075
	Total real estate	2,218,750				2,188,392
	Real estate construction:
	One-to-four family residential	57,310				54,155
	Commercial and multifamily residential	130,809				126,390
	Total real estate construction	188,119				180,545
	Consumer	351,255				357,014
	Less: Net unearned income	(62,724		)		(68,282		)
	Total noncovered loans, net of unearned income	4,297,076				4,219,451
	Less: Allowance for loan and lease losses	(50,442		)		(52,280		)
	Total noncovered loans, net	$	4,246,634			$	4,167,171
	Loans held for sale	$	—			$	735
	At March 31, 2014 and December 31, 2013, 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 and Oregon.
	The Company has granted 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 $14.1 million at March 31, 2014 and $14.2 million at December 31, 2013. During the first three months of 2014, advances on related party loans totaled $595 thousand and repayments totaled $633 thousand.
	At March 31, 2014 and December 31, 2013, $1.09 billion and $1.08 billion of commercial and residential real estate loans were pledged as collateral on Federal Home Loan Bank borrowings and additional borrowing capacity. The Company has also pledged $82.1 million and $45.2 million of commercial loans to the Federal Reserve Bank for additional borrowing capacity at March 31, 2014 and December 31, 2013, respectively.
	The following is an analysis of noncovered, nonaccrual loans as of March 31, 2014 and December 31, 2013:
		March 31, 2014								December 31, 2013
		Recorded				Unpaid Principal				Recorded			Unpaid Principal
		Investment				Balance				Investment			Balance
		Nonaccrual				Nonaccrual				Nonaccrual			Nonaccrual
		Loans				Loans				Loans			Loans
	Noncovered loans:	(in thousands)
	Commercial business:
	Secured	$	14,255			$	20,481			$	12,433		$	19,186
	Unsecured	286				316				176			202
	Real estate:
	One-to-four family residential	2,900				5,112				2,667			4,678
	Commercial & multifamily residential:
	Commercial land	775				1,101				442			783
	Income property	5,038				6,118				4,267			5,383
	Owner occupied	5,237				7,397				6,334			7,486
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	2,494				5,469				3,246			6,601
	Residential construction	532				2,001				459			1,928
	Consumer	4,880				6,804				3,991			6,187
	Total	$	36,397			$	54,799			$	34,015		$	52,434
	The following is an aging of the recorded investment of the noncovered loan portfolio as of March 31, 2014 and December 31, 2013:
		Current				30 - 59				60 - 89			Greater				Total				Nonaccrual		Total Loans
		Loans				Days				Days			than 90				Past Due				Loans
						Past Due				Past Due			Days Past
													Due
	March 31, 2014	(in thousands)
	Noncovered loans:
	Commercial business:
	Secured	$	1,502,131			$	2,526			$	5,448		$	—			$	7,974			$	14,255	$	1,524,360
	Unsecured	71,514				247				116			—				363				286		72,163
	Real estate:
	One-to-four family residential	97,365				2,589				—			—				2,589				2,900		102,854
	Commercial & multifamily residential:
	Commercial land	143,854				666				—			—				666				775		145,295
	Income property	1,175,538				5,951				455			—				6,406				5,038		1,186,982
	Owner occupied	746,749				1,138				132			—				1,270				5,237		753,256
	Real estate construction:
One-to-four family residential:
Land and acquisition	9,922				1,164				—			—				1,164				2,494		13,580
Residential construction	42,699				102				—			—				102				532		43,333
Commercial & multifamily residential:
Income property	90,698				—				—			—				—				—		90,698
Owner occupied	39,388				—				—			—				—				—		39,388
Consumer	319,391				772				124			—				896				4,880		325,167
Total	$	4,239,249			$	15,155			$	6,275		$	—			$	21,430			$	36,397	$	4,297,076
	Current				30 - 59				60 - 89			Greater				Total				Nonaccrual		Total Loans
	Loans				Days				Days			than 90				Past Due				Loans
					Past Due				Past Due			Days Past
												Due
December 31, 2013	(in thousands)
Noncovered loans:
Commercial business:
Secured	$	1,457,820			$	12,713			$	681		$	—			$	13,394			$	12,433	$	1,483,647
Unsecured	72,255				156				17			—				173				176		72,604
Real estate:
One-to-four family residential	100,591				1,993				641			—				2,634				2,667		105,892
Commercial & multifamily residential:
Commercial land	142,034				—				358			—				358				442		142,834
Income property	1,138,732				144				3,289			—				3,433				4,267		1,146,432
Owner occupied	749,561				4,714				—			—				4,714				6,334		760,609
Real estate construction:
One-to-four family residential:
Land and acquisition	8,225				199				—			—				199				3,246		11,670
Residential construction	41,533				—				—			—				—				459		41,992
Commercial & multifamily residential:
Income property	86,521				—				—			—				—				—		86,521
Owner occupied	38,916				—				—			—				—				—		38,916
Consumer	322,685				835				823			—				1,658				3,991		328,334
Total	$	4,158,873			$	20,754			$	5,809		$	—			$	26,563			$	34,015	$	4,219,451
The following is an analysis of impaired loans as of March 31, 2014 and December 31, 2013:
	Recorded Investment				Recorded Investment				Impaired Loans With											Impaired Loans Without
	of Loans				of Loans				Recorded Allowance											Recorded Allowance
	Collectively Measured				Individually
	for Contingency				Measured for
	Provision				Specific
					Impairment				Recorded			Unpaid				Related				Recorded		Unpaid
									Investment			Principal				Allowance				Investment		Principal
												Balance										Balance
March 31, 2014	(in thousands)
Noncovered loans:
Commercial business:
Secured	$	1,516,983			$	7,377			$	3,202		$	3,235			$	1,521			$	4,175	$	4,715
Unsecured	72,136				27				27			27				27				—		—
Real estate:
One-to-four family residential	100,762				2,092				437			476				133				1,655		2,812
Commercial & multifamily residential:
Commercial land	145,188				107				—			—				—				107		398
Income property	1,180,523				6,459				—			—				—				6,459		8,968
Owner occupied	743,984				9,272				593			592				38				8,679		13,042
Real estate construction:
One-to-four family residential:
Land and acquisition	12,386				1,194				113			112				71				1,081		1,456
Residential construction	43,333				—				—			—				—				—		—
Commercial & multifamily residential:
Income property	90,698				—				—			—				—				—		—
Owner occupied	39,388				—				—			—				—				—		—
Consumer	325,008				159				21			26				3				138		204
Total	$	4,270,389			$	26,687			$	4,393		$	4,468			$	1,793			$	22,294	$	31,595
	Recorded Investment				Recorded Investment				Impaired Loans With											Impaired Loans Without
	of Loans				of Loans				Recorded Allowance											Recorded Allowance
	Collectively Measured				Individually
	for Contingency				Measured for
	Provision				Specific
					Impairment				Recorded			Unpaid				Related				Recorded		Unpaid
									Investment			Principal				Allowance				Investment		Principal
												Balance										Balance
December 31, 2013	(in thousands)
Noncovered loans:
Commercial business:
Secured	$	1,478,560			$	5,087			$	2,866		$	2,885			$	343			$	2,221	$	2,560
Unsecured	72,569				35				35			35				35				—		—
Real estate:
One-to-four family residential	104,272				1,620				442			479				138				1,178		2,119
Commercial & multifamily residential:
Commercial land	142,719				115				—			—				—				115		398
Income property	1,140,019				6,413				918			933				26				5,495		7,885
Owner occupied	749,601				11,008				3,802			3,817				1,073				7,206		10,464
Real estate construction:
One-to-four family residential:
Land and acquisition	9,726				1,944				113			113				71				1,831		2,587
Residential construction	41,992				—				—			—				—				—		—
Commercial & multifamily residential:
Income property	86,521				—				—			—				—				—		—
Owner occupied	38,916				—				—			—				—				—		—
Consumer	328,167				167				23			27				4				144		210
Total	$	4,193,062			$	26,389			$	8,199		$	8,289			$	1,690			$	18,190	$	26,223
The following table provides additional information on impaired loans for the three month periods indicated.
	Three Months Ended March 31,
	2014								2013
	Average Recorded				Interest Recognized				Average Recorded			Interest Recognized
	Investment				on				Investment			on
	Impaired Loans				Impaired Loans				Impaired Loans			Impaired Loans
Noncovered loans:	(in thousands)
Commercial business:
Secured	$	6,232			$	17			$	4,917		$	4
Unsecured	31				—				88			1
Real estate:
One-to-four family residential	1,856				13				1,816			4
Commercial & multifamily residential:
Commercial land	111				—				2,714			—
Income property	6,436				62				8,710			29
Owner occupied	10,140				241				11,620			279
Real estate construction:
One-to-four family residential:
Land and acquisition	1,569				1				2,700			1
Residential construction	—				—				1,051			2
Consumer	163				2				127			2
Total	$	26,538			$	336			$	33,743		$	322
The following is an analysis of loans classified as TDR during the three months ended March 31, 2014 and 2013:
	Three months ended March 31, 2014										Three months ended March 31, 2013
	Number of TDR Modifications			Pre-Modification				Post-Modification			Number of TDR Modifications			Pre-Modification				Post-Modification
				Outstanding				Outstanding						Outstanding				Outstanding
				Recorded				Recorded						Recorded				Recorded
				Investment				Investment						Investment				Investment
Noncovered loans:	(dollars in thousands)
Commercial business:
Secured	2			$	546			$	546		—			$	—			$	—
Real estate:
One-to-four family residential	2			494				494			—			—				—
Commercial and multifamily residential:
Income property	1			143				126			—			—				—
Real estate construction:
One-to-four family residential:
Land and acquisition	—			$	—			$	—		1			117				117
Total	5			$	1,183			$	1,166		1			$	117			$	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 completed in the three month periods ending March 31, 2014 and 2013 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 $182 thousand of additional funds on loans classified as TDR as of March 31, 2014, but had no commitments to lend additional funds on loans classified as TDR as of December 31, 2013. 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, 2014 and 2013.

Allowance_for_Noncovered_Loan_

Allowance for Noncovered Loan and Lease Losses and Unfunded Commitments and Letters of Credit	3 Months Ended
	Mar. 31, 2014
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit	'
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit Text Block	'
		Allowance for Noncovered Loan and Lease Losses and Unfunded Commitments and Letters of Credit
	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 Accounting Standards Codification ("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 systematically calculated quarterly using quantitative and qualitative information about specific loan classes. The minimum required level an entity develops a methodology to determine its allowance for loan and lease losses is by general categories of loans, such as commercial business, real estate, and consumer. However, the Company’s methodology in determining its allowance for loan and lease losses 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, 2014 and 2013. 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 strive towards maintaining a conservative approach to credit quality and will continue to prudently adjust our ALLL as necessary in order 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.
	The following tables show a detailed analysis of the allowance for loan and lease losses for noncovered loans for the three months ended March 31, 2014 and 2013:
			Beginning			Charge-offs			Recoveries		Provision (Recovery)			Ending		Specific		General
			Balance											Balance		Reserve		Allocation
	Three months ended March 31, 2014		(in thousands)
	Noncovered loans:
	Commercial business:
	Secured		$	31,027		$	(198	)	$	448	$	(2,476	)	$	28,801	$	1,521	$	27,280
	Unsecured		696			(35		)	42		43			746		27		719
	Real estate:
	One-to-four family residential		1,252			(207		)	28		121			1,194		133		1,061
	Commercial & multifamily residential:
	Commercial land		489			—			17		73			579		—		579
	Income property		9,234			—			13		860			10,107		—		10,107
	Owner occupied		3,605			(1,023		)	9		1,969			4,560		38		4,522
	Real estate construction:
	One-to-four family residential:
	Land and acquisition		610			—			39		(69		)	580		71		509
	Residential construction		822			—			3		(129		)	696		—		696
	Commercial & multifamily residential:
	Income property		285			—			—		35			320		—		320
	Owner occupied		58			—			—		96			154		—		154
	Consumer		2,547			(727		)	253		564			2,637		3		2,634
	Unallocated		1,655			—			—		(1,587		)	68		—		68
	Total		$	52,280		$	(2,190	)	$	852	$	(500	)	$	50,442	$	1,793	$	48,649
			Beginning			Charge-offs			Recoveries		Provision (Recovery)			Ending		Specific		General
			Balance											Balance		Reserve		Allocation
	Three months ended March 31, 2013		(in thousands)
	Noncovered loans:
	Commercial business:
	Secured		$	27,270		$	(988	)	$	79	$	510		$	26,871	$	67	$	26,804
	Unsecured		753			(326		)	34		289			750		84		666
	Real estate:
	One-to-four family residential		694			(116		)	—		79			657		108		549
	Commercial & multifamily residential:
	Commercial land		460			—			10		(37		)	433		—		433
	Income property		11,033			(783		)	79		(918		)	9,411		18		9,393
	Owner occupied		6,362			—			4		(908		)	5,458		34		5,424
	Real estate construction:
	One-to-four family residential:
	Land and acquisition		1,171			(32		)	2,139		(2,288		)	990		74		916
	Residential construction		635			(101		)	—		4			538		—		538
	Commercial & multifamily residential:
	Income property		316			—			—		66			382		—		382
	Owner occupied		102			—			—		6			108		—		108
	Consumer		2,437			(171		)	47		51			2,364		—		2,364
	Unallocated		1,011			—			—		2,146			3,157		—		3,157
	Total		$	52,244		$	(2,517	)	$	2,392	$	(1,000	)	$	51,119	$	385	$	50,734
	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,
			2014			2013
			(in thousands)
Balance at beginning of period		$	2,505		$	1,915
Net changes in the allowance for unfunded commitments and letters of credit		(50		)	—
Balance at end of period		$	2,455		$	1,915
Risk Elements
The extension of credit in the form of loans to individuals and businesses is one of our principal commerce 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, 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 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 loans have potential weaknesses that, if left uncorrected, may result in deterioration of the repayment prospects for the asset or in the Company's credit position at some future date. Loans with a risk rating of Substandard or worse are reported as classified loans in our allowance for loan and lease losses 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. Substandard loans reflect loans where a loss is possible if loan weaknesses are not corrected. Doubtful loans have a high probability of loss, however, the amount of loss has not yet been determined. Loss loans are considered uncollectable and when identified, are charged off.
The following is an analysis of the credit quality of our noncovered loan portfolio as of March 31, 2014 and December 31, 2013:
		Pass			Special Mention			Substandard		Doubtful			Loss		Total
March 31, 2014		(in thousands)
Noncovered loans:
Commercial business:
Secured		$	1,422,773		$	42,648		$	58,778	$	161		$	—	$	1,524,360
Unsecured		71,654			199			310		—			—		72,163
Real estate:
One-to-four family residential		97,004			1,448			4,402		—			—		102,854
Commercial and multifamily residential:
Commercial land		139,910			—			5,385		—			—		145,295
Income property		1,150,595			974			35,413		—			—		1,186,982
Owner occupied		739,956			1,443			11,857		—			—		753,256
Real estate construction:
One-to-four family residential:
Land and acquisition		9,928			—			3,652		—			—		13,580
Residential construction		38,413			2,120			2,800		—			—		43,333
Commercial and multifamily residential:
Income property		90,235			—			463		—			—		90,698
Owner occupied		38,973			415			—		—			—		39,388
Consumer		318,977			—			6,185		5			—		325,167
Total		$	4,118,418		$	49,247		$	129,245	$	166		$	—	4,297,076
Less:
Allowance for loan and lease losses															50,442
Noncovered loans, net															$	4,246,634
		Pass			Special Mention			Substandard		Doubtful			Loss		Total
December 31, 2013		(in thousands)
Noncovered loans:
Commercial business:
Secured		$	1,372,038		$	43,309		$	68,300	$	—		$	—	$	1,483,647
Unsecured		72,226			199			179		—			—		72,604
Real estate:
One-to-four family residential		98,626			1,567			5,699		—			—		105,892
Commercial and multifamily residential:
Commercial land		137,850			—			4,984		—			—		142,834
Income property		1,108,033			5,473			32,926		—			—		1,146,432
Owner occupied		748,725			—			11,884		—			—		760,609
Real estate construction:
One-to-four family residential:
Land and acquisition		7,526			—			4,144		—			—		11,670
Residential construction		36,270			2,352			3,370		—			—		41,992
Commercial and multifamily residential:
Income property		86,206			—			315		—			—		86,521
Owner occupied		38,916			—			—		—			—		38,916
Consumer		321,348			331			6,188		467			—		328,334
Total		$	4,027,764		$	53,231		$	137,989	$	467		$	—	4,219,451
Less:
Allowance for loan and lease losses															52,280
Noncovered loans, net															$	4,167,171

Changes_in_Noncovered_Other_Re

Changes in Noncovered Other Real Estate Owned	3 Months Ended
	Mar. 31, 2014
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]	'
Changes in Noncovered Other Real Estate Owned	'
	Changes in Noncovered Other Real Estate Owned ("OREO")
	The following tables set forth activity in noncovered OREO for the three months ended March 31, 2014 and 2013:
		Three Months Ended March 31,
		2014			2013
		(in thousands)
	Noncovered OREO:
	Balance at beginning of period	$	23,834		$	10,676
	Transfers in, net of write-downs ($0 and $32, respectively)	244			2,709
	Additional OREO write-downs	(929		)	(93		)
	Proceeds from sale of OREO property	(8,102		)	(1,565		)
	Gain on sale of OREO, net	793			189
	Total noncovered OREO at end of period	$	15,840		$	11,916

Covered_Assets_and_FDIC_Losssh

Covered Assets and FDIC Loss-sharing Asset	3 Months Ended
	Mar. 31, 2014
Covered Assets And FDIC Loss Sharing Asset	'
Covered Assets and FDIC Loss sharing Asset	'
	Covered Assets and FDIC Loss-sharing Asset
	Covered Assets
	Covered assets consist of loans and OREO acquired in certain FDIC-assisted acquisitions during 2010 and 2011, for which the Bank entered into loss-sharing agreements, whereby the FDIC will cover a substantial portion of future losses on loans (and related unfunded loan commitments), OREO and certain accrued interest on loans during the terms of the agreements. 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 commercial and single-family mortgage loans are in effect for five and ten years, respectively, from the acquisition dates and the loss recovery provisions are in effect for eight and ten years, respectively, from the acquisition dates.
	Ten years and forty-five days after the acquisition dates, the Bank shall 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, 2014, the net present value of the Bank’s estimated clawback liability is $4.1 million, which is included in other liabilities on the consolidated balance sheets.
	The following is an analysis of our covered loans, net of related allowance for losses as of March 31, 2014 and December 31, 2013:
		March 31, 2014			December 31, 2013
	Covered loans:	(dollars in thousands)
	Commercial business	$	64,945		$	72,870
	Real estate:
	One-to-four family residential	39,056			41,642
	Commercial and multifamily residential	163,976			170,879
	Total real estate	203,032			212,521
	Real estate construction:
	One-to-four family residential	10,969			14,781
	Commercial and multifamily residential	6,349			6,869
	Total real estate construction	17,318			21,650
	Consumer	32,541			34,101
	Subtotal of covered loans	317,836			341,142
	Less:
	Valuation discount resulting from acquisition accounting	37,549			43,297
	Allowance for loan losses	20,129			20,174
	Covered loans, net of allowance for loan losses	$	260,158		$	277,671
	Acquired impaired 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. Acquired 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.
	Acquired impaired loans are also subject to the Company’s internal and external credit review and are risk rated using the same criteria as loans originated by the Company. However, risk ratings are not a clear indicator of losses on acquired loans as the loans were acquired with a significant discount and a majority of the losses are recoverable from the FDIC under the loss-sharing agreements.
	Losses attributable to draws on acquired loans, advanced subsequent to the loan acquisition date, are accounted for under ASC 450-20 and those amounts are also subject to the Company’s internal and external credit review. An allowance for loan losses is estimated in a similar manner as the originated loan portfolio, and a provision for loan losses is charged to earnings as necessary.
	The excess of cash flows expected to be collected over the initial fair value of acquired 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 table shows the changes in accretable yield for acquired loans for the three months ended March 31, 2014 and 2013:
		Three Months Ended March 31,
		2014			2013
		(in thousands)
	Balance at beginning of period	$	103,907		$	166,888
	Accretion	(10,569		)	(14,477		)
	Disposals	(2,826		)	(774		)
	Reclassifications from nonaccretable difference	11,031			7,149
	Balance at end of period	$	101,543		$	158,786
	During the three months ended March 31, 2014, the Company recorded a provision for losses on covered loans of $2.4 million. Of this amount, $2.6 million was impairment calculated in accordance with ASC 310-30 and $200 thousand was a provision recapture to adjust the allowance for loss calculated under ASC 450-20 for draws on acquired loans. The impact to earnings of the $2.4 million of provision for covered loans was partially offset through noninterest income by a $1.9 million favorable adjustment to the change FDIC loss-sharing asset line item.
	The changes in the ALLL for covered loans for the three months ended March 31, 2014 and 2013 are summarized as follows:
		Three Months Ended March 31,
		2014			2013
		(in thousands)
	Balance at beginning of period	$	20,174		$	30,056
	Loans charged off	(4,273		)	(2,382		)
	Recoveries	1,806			835
	Provision for loan losses	2,422			980
	Balance at end of period	$	20,129		$	29,489
	The following is an analysis of the credit quality of our covered loan portfolio as of March 31, 2014 and December 31, 2013:
		Pass			Special Mention			Substandard		Doubtful		Loss		Total
	March 31, 2014	(in thousands)
	Covered loans:
	Commercial business:
	Secured	$	44,916		$	1,276		$	15,549	$	—	$	—	$	61,741
	Unsecured	2,728			396			80		—		—		3,204
	Real estate:
	One-to-four family residential	32,729			1,828			4,499		—		—		39,056
	Commercial and multifamily residential:
	Commercial land	10,487			—			7,740		—		—		18,227
	Income property	58,519			3,945			7,557		—		—		70,021
	Owner occupied	65,389			814			9,525		—		—		75,728
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	4,036			—			1,579		—		—		5,615
Residential construction	2,973			—			2,381		—		—		5,354
Commercial and multifamily residential:
Income property	3,761			—			1,523		—		—		5,284
Owner occupied	1,065			—			—		—		—		1,065
Consumer	29,657			—			2,857		27		—		32,541
Total	$	256,260		$	8,259		$	53,290	$	27	$	—	317,836
Less:
Valuation discount resulting from acquisition accounting													37,549
Allowance for loan losses													20,129
Covered loans, net													$	260,158
	Pass			Special Mention			Substandard		Doubtful		Loss		Total
December 31, 2013	(in thousands)
Covered loans:
Commercial business:
Secured	$	48,510		$	2,849		$	18,291	$	—	$	—	$	69,650
Unsecured	2,732			396			92		—		—		3,220
Real estate:
One-to-four family residential	35,066			1,842			4,734		—		—		41,642
Commercial and multifamily residential:
Commercial land	10,778			198			7,589		—		—		18,565
Income property	55,985			3,950			10,657		—		—		70,592
Owner occupied	67,653			111			13,958		—		—		81,722
Real estate construction:
One-to-four family residential:
Land and acquisition	4,674			2,739			1,936		—		—		9,349
Residential construction	3,008			—			2,424		—		—		5,432
Commercial and multifamily residential:
Income property	3,806			—			1,709		—		—		5,515
Owner occupied	1,074			—			280		—		—		1,354
Consumer	30,722			33			3,319		27		—		34,101
Total	$	264,008		$	12,118		$	64,989	$	27	$	—	341,142
Less:
Valuation discount resulting from acquisition accounting													43,297
Allowance for loan losses													20,174
Covered loans, net													$	277,671
The following table sets forth activity in covered OREO at carrying value for the three months ended March 31, 2014 and 2013:
	Three Months Ended March 31,
	2014			2013
	(in thousands)
Covered OREO:
Balance at beginning of period	$	12,093		$	16,311
Transfers in	5,507			1,405
Additional OREO write-downs	(651		)	(65		)
Proceeds from sale of OREO property	(3,103		)	(6,438		)
Net gain on sale of OREO	866			2,598
Total covered OREO at end of period	$	14,712		$	13,811
The covered OREO is subject to loss-sharing agreements with the FDIC in which the FDIC will share in 80% of additional write-downs, as well as gains and losses on covered OREO sales, or 95%, if applicable, of additional write-downs, as wells as gains and losses on covered OREO sales if the minimum loss share thresholds are met.
FDIC Loss-sharing Asset
At March 31, 2014, the FDIC loss-sharing asset is comprised of a $30.5 million FDIC indemnification asset and a $6.3 million FDIC receivable. The indemnification represents the cash flows the Company expects to collect from the FDIC under the loss-sharing agreements and the FDIC receivable represents the reimbursable amounts from the FDIC that have not yet been received.
For covered 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, 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, 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, 2014 and 2013:
	Three Months Ended March 31,
	2014			2013
	(in thousands)
Balance at beginning of period	$	39,846		$	96,354
Adjustments not reflected in income:
Cash payments to (from) the FDIC	1,678			(3,119		)
FDIC reimbursable losses, net	132			363
Adjustments reflected in income:
Amortization, net	(6,452		)	(9,779		)
Loan impairment	1,938			784
Sale of other real estate	(756		)	(1,346		)
Write-downs of other real estate	516			52
Other	(65		)	(194		)
Balance at end of period	$	36,837		$	83,115

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2014
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,
		2014			2013
		(in thousands)
	Total goodwill (1)	343,952			115,554
	Other intangible assets, net
	Core deposit intangible:
	Gross core deposit intangible balance at beginning of period (1)	47,698			32,441
	Accumulated amortization at beginning of period	(22,765		)	(16,720		)
	Core deposit intangible, net at beginning of period	24,933			15,721
	CDI current period amortization	(1,579		)	(1,028		)
	Total core deposit intangible, net at end of period	23,354			14,693
	Intangible assets not subject to amortization	919			—
	Other intangible assets, net at end of period	24,273			14,693
	Total goodwill and other intangible assets at end of period	$	368,225		$	130,247
	__________
	(1) See Note 3, Business Combinations, for additional information regarding goodwill and intangible assets recorded related to the acquisition of West Coast on April 1, 2013.
	The following table provides the estimated future amortization expense of core deposit intangibles for the remaining nine months ending December 31, 2014 and the succeeding four years:
		Amount
		(in thousands)
	Year ending December 31,
	2014	$	4,383
	2015	4,934
	2016	4,195
	2017	3,361
	2018	2,500

Shareholders_Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2014
Stockholders' Equity Note [Abstract]	'
Shareholders' Equity	'
	Shareholders’ Equity
	Preferred Stock. In conjunction with the acquisition of West Coast, the Company issued 8,782 shares of mandatorily convertible cumulative participating preferred stock, Series B. 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.
	Warrants to Purchase Common Stock. In conjunction with the acquisition of West Coast, the Company issued Amended and Restated Warrants (the "Warrants") to purchase shares of Company common stock at an exercise price of $8.58 per share. The Company's Amended and Restated Warrants amended and restated Class C Warrants previously issued by West Coast. The Warrants were immediately exercisable and will expire on October 23, 2016. At March 31, 2014, the aggregate amount of Company common shares and value called for by warrants outstanding was 582,799 and $5.0 million, respectively. This reflects the exercise of 1,631,840 warrant shares during the current quarter. As the warrants contain a cashless exercise feature, the net shares issued by the Company as a result of this exercise activity was 1,139,698.
	Dividends. On January 23, 2014 the Company declared a quarterly cash dividend of $0.12 per common share and common share equivalent for holders of preferred stock, payable on February 19, 2014 to shareholders of record at the close of business February 5, 2014. Subsequent to quarter end, on April 23, 2014, the Company declared a regular quarterly cash dividend of $0.12 per common share, and common share equivalent for holders of preferred stock, and a special, one-time cash dividend of $0.12 per common share, and common share equivalent for holders of preferred stock, both payable on May 21, 2014 to shareholders of record at the close of business May 7, 2014. 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_Comprehensiv

Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Abstract]	'
Accumulated Other Comprehensive Income	'
	Accumulated 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, 2014 and 2013:
		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, 2014	(in thousands)
	Beginning balance	$	(10,108	)	$	(1,936	)	$	(12,044	)
	Other comprehensive income before reclassifications	7,119			—			7,119
	Amounts reclassified from accumulated other comprehensive loss (2)	(142		)	24			(118		)
	Net current-period other comprehensive income	6,977			24			7,001
	Ending balance	$	(3,131	)	$	(1,912	)	$	(5,043	)
	Three months ended March 31, 2013
	Beginning balance	$	20,918		$	(769	)	$	20,149
	Other comprehensive loss before reclassifications	(2,493		)	(757		)	(3,250		)
	Amounts reclassified from accumulated other comprehensive income (2)	(240		)	60			(180		)
	Net current-period other comprehensive loss	(2,733		)	(697		)	(3,430		)
	Ending balance	$	18,185		$	(1,466	)	$	16,719
	__________
	(1) All amounts are net of tax. Amounts in parenthesis indicate debits.
	(2) See following table for details about these reclassifications.
	The following table shows details regarding the reclassifications from accumulated other comprehensive income for the three month periods ended March 31, 2014 and 2013:
		Amount Reclassified from Accumulated Other Comprehensive Loss						Affected line Item in the Consolidated Statement of Income
		Three Months Ended March 31,
		2014			2013
		(in thousands)
	Unrealized gains and losses on available-for-sale securities
	Investment securities gains	$	223		$	370		Investment securities gains, net
		223			370			Total before tax
		(81		)	(130		)	Income tax provision
		$	142		$	240		Net of tax
	Amortization of pension plan liability
	Actuarial losses	$	(37	)	$	(92	)	Compensation and employee benefits
		(37		)	(92		)	Total before tax
		13			32			Income tax benefit
		$	(24	)	$	(60	)	Net of tax

Derivatives_and_Balance_Sheet_

Derivatives and Balance Sheet Offsetting

3 Months Ended

Mar. 31, 2014

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, 2014 and December 31, 2013 was $186.9 million and $179.5 million, respectively. There was no impact to the statement of income for the three month periods ending March 31, 2014 and 2013.

The following table presents the fair value of derivatives not designated as hedging instruments at March 31, 2014 and December 31, 2013:

Asset Derivatives

Liability Derivatives

March 31, 2014

December 31, 2013

March 31, 2014

December 31, 2013

Balance Sheet

Fair Value

Balance Sheet

Fair Value

Balance Sheet

Fair Value

Balance Sheet

Fair Value

Location

Location

Location

Location

(in thousands)

Interest rate contracts

Other assets

$

9,418

Other assets

$

9,044

Other liabilities

$

9,418

Other liabilities

$

9,044

Fair_Value_Accounting_and_Meas

Fair Value Accounting and Measurement	3 Months Ended
	Mar. 31, 2014
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, 2014 and December 31, 2013 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, 2014	(in thousands)
	Assets
	Securities available for sale:
	U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations	$	912,298	$	—		$	912,298	$	—
	State and municipal debt securities	373,680		—			373,680		—
	U.S. government agency and government-sponsored enterprise securities	327,986		—			327,986		—
	U.S. government securities	20,303		20,303			—		—
	Other securities	5,103		—			5,103		—
	Total securities available for sale	$	1,639,370	$	20,303		$	1,619,067	$	—
	Other assets (Interest rate contracts)	$	9,418	$	—		$	9,418	$	—
	Liabilities
	Other liabilities (Interest rate contracts)	$	9,418	$	—		$	9,418	$	—
		Fair value		Fair Value Measurements at Reporting Date Using
				Level 1			Level 2		Level 3
	December 31, 2013	(in thousands)
	Assets
	Securities available for sale:
	U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations	$	948,408	$	—		$	948,408	$	—
	State and municipal debt securities	364,470		—			364,470		—
	U.S. government agency and government-sponsored enterprise securities	326,039		—			326,039		—
	U.S. government securities	20,114		20,114			—		—
	Other securities	5,080		—			5,080		—
	Total securities available for sale	$	1,664,111	$	20,114		$	1,643,997	$	—
	Other assets (Interest rate contracts)	$	9,044	$	—		$	9,044	$	—
	Liabilities
	Other liabilities (Interest rate contracts)	$	9,044	$	—		$	9,044	$	—
	There were no transfers between Level 1 and Level 2 of the valuation hierarchy during the three month periods ended March 31, 2014 and 2013. 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 and other personal property owned ("OPPO")—OREO and OPPO are real and personal property that the Bank has taken ownership of in partial or full satisfaction of a loan or loans. OREO and OPPO are generally measured based on the item's fair market value as indicated by an appraisal or a letter of intent to purchase. OREO and OPPO are recorded at the lower of carrying amount or fair value less estimated costs to sell. This amount becomes the property’s new basis. Any write-downs based on the property fair value less estimated costs to sell at the date of acquisition are charged to the allowance for loan and lease losses. Management periodically reviews OREO and OPPO in an effort to ensure the property is carried at the lower of its new basis or fair value, net of estimated costs to sell. Any write-downs subsequent to acquisition are charged to earnings. The initial and subsequent write-down 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 OPPO 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 the Company's assets that were measured using fair value estimates on a nonrecurring basis during the periods ended March 31, 2014 and 2013:
		Fair value at March 31, 2014		Fair Value Measurements at Reporting Date Using							Losses During the Three Months Ended
				Level 1			Level 2		Level 3		March 31, 2014
		(in thousands)
	Impaired loans	$	2,094	$	—		$	—	$	2,094	$	1,387
	Noncovered OREO	1,749		—			—		1,749		687
	Covered OREO	4,376		—			—		4,376		616
		$	8,219	$	—		$	—	$	8,219	$	2,690
		Fair value at		Fair Value Measurements at Reporting Date Using							Losses During the Three Months Ended
		March 31, 2013		Level 1			Level 2		Level 3		31-Mar-13
		(in thousands)
	Impaired loans	$	477	$	—		$	—	$	477	$	102
	Noncovered OREO	1,350		—			—		1,350		101
	Covered OREO	65		—			—		65		65
		$	1,892	$	—		$	—	$	1,892	$	268
	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 and OPPO disclosed above represent the write-downs taken at foreclosure that were charged to the allowance for loan and lease losses, as well as subsequent write-downs from updated appraisals that were charged 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 March 31, 2014		Valuation Technique		Unobservable Input	Range (Weighted Average) (1)
		(dollars in thousands)
Impaired loans - real estate collateral	$	990	Fair Market Value of Collateral		Adjustment to Appraisal Value	N/A (2)
Impaired loans - other collateral (3)	1,104		Fair Market Value of Collateral		Adjustment to Stated value	0% - 100% (68%)
Noncovered OREO	$	1,749	Fair Market Value of Collateral		Adjustment to Appraisal Value	N/A (2)
Covered OREO	4,376		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 collateralized by real estate, noncovered OREO and covered OREO because there were no adjustments made to the appraisal value during the current period.
(3) Other collateral consists of accounts receivable, inventory and equipment.
	Fair value at		Valuation Technique		Unobservable Input	Range (Weighted Average) (1)
	March 31, 2013
	(dollars in thousands)
Impaired loans	$	477	Fair Market Value of Collateral		Adjustment to Appraisal Value	N/A (2)
Noncovered OREO	1,350		Fair Market Value of Collateral		Adjustment to Appraisal Value	N/A (2)
Covered OREO	65		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 collateralized by real estate, noncovered OREO and covered 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—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, 2014 or December 31, 2013, 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 covered loans, fair value is estimated by discounting the expected future cash flows using a lending rate that would have been offered on March 31, 2014 (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 as their basis, readily observable market parameters (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 Federal Home Loan Bank of Seattle (the “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 securities sold under agreement to repurchase is estimated based on discounting the future cash flows using the market rate currently offered (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, 2014 and December 31, 2013:
	March 31, 2014
	Carrying		Fair			Level 1		Level 2		Level 3
	Amount		Value
	(in thousands)
Assets
Cash and due from banks	$	191,706	$	191,706		$	191,706	$	—	$	—
Interest-earning deposits with banks	45,083		45,083			45,083		—		—
Securities available for sale	1,639,370		1,639,370			20,303		1,619,067		—
FHLB stock	32,224		32,224			—		32,224		—
Loans	4,506,792		4,654,744			—		—		4,654,744
FDIC loss-sharing asset	36,837		13,512			—		—		13,512
Interest rate contracts	9,418		9,418			—		9,418		—
Liabilities
Deposits	$	6,044,416	$	6,043,226		$	5,554,663	$	488,563	$	—
FHLB Advances	6,597		5,452			—		5,452		—
Repurchase agreements	25,000		26,303			—		26,303		—
Interest rate contracts	9,418		9,418			—		9,418		—
	December 31, 2013
	Carrying		Fair			Level 1		Level 2		Level 3
	Amount		Value
	(in thousands)
Assets
Cash and due from banks	$	165,030	$	165,030		$	165,030	$	—	$	—
Interest-earning deposits with banks	14,531		14,531			14,531		—		—
Securities available for sale	1,664,111		1,664,111			20,114		1,643,997		—
FHLB stock	32,529		32,529			—		32,529		—
Loans held for sale	735		735			—		735		—
Loans	4,444,842		4,605,038			—		—		4,605,038
FDIC loss-sharing asset	39,846		11,248			—		—		11,248
Interest rate contracts	9,044		9,044			—		9,044		—
Liabilities
Deposits	$	5,959,475	$	5,958,747		$	5,449,546	$	509,201	$	—
FHLB Advances	36,606		35,080			—		35,080		—
Repurchase agreements	25,000		26,361			—		26,361		—
Interest rate contracts	9,044		9,044			—		9,044		—

Earnings_per_Common_Share

Earnings per Common Share	3 Months Ended
	Mar. 31, 2014
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, 2014 and 2013:
		Three Months Ended
		March 31,
		2014		2013
		(in thousands except per share)
	Basic EPS:
	Net income	$	19,844	$	12,176
	Less: Earnings allocated to participating securities
	Preferred shares	40		—
	Nonvested restricted shares	169		123
	Earnings allocated to common shareholders	$	19,635	$	12,053
	Weighted average common shares outstanding	51,097		39,348
	Basic earnings per common share	$	0.38	$	0.31
	Diluted EPS:
	Earnings allocated to common shareholders	$	19,639	$	12,053
	Weighted average common shares outstanding	51,097		39,348
	Dilutive effect of equity awards	1,336		3
	Weighted average diluted common shares outstanding	52,433		39,351
	Diluted earnings per common share	$	0.37	$	0.31
	Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive	83		9

Securities_Tables

Securities (Tables)	3 Months Ended
	Mar. 31, 2014
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
		Cost		Unrealized			Unrealized
				Gains			Losses
		(in thousands)
	March 31, 2014
	U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	919,299	$	10,339		$	(17,340	)	$	912,298
	State and municipal securities	363,983		12,472			(2,775		)	373,680
	U.S. government agency and government-sponsored enterprise securities	335,151		477			(7,642		)	327,986
	U.S. government securities	21,088		1			(786		)	20,303
	Other securities	5,284		25			(206		)	5,103
	Total	$	1,644,805	$	23,314		$	(28,749	)	$	1,639,370
	December 31, 2013
	U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	961,442	$	10,640		$	(23,674	)	$	948,408
	State and municipal securities	357,013		11,450			(3,993		)	364,470
	U.S. government agency and government-sponsored enterprise securities	335,671		434			(10,066		)	326,039
	U.S. government securities	21,081		—			(967		)	20,114
	Other securities	5,284		27			(231		)	5,080
	Total	$	1,680,491	$	22,551		$	(38,931	)	$	1,664,111
Schedule of Contractual Maturities of Investment Securities Available for Sale	'
	The scheduled contractual maturities of investment securities available for sale at March 31, 2014 are presented as follows:
		March 31, 2014
		Amortized Cost		Fair Value
		(in thousands)
	Due within one year	$	23,252	$	23,415
	Due after one year through five years	337,507		336,477
	Due after five years through ten years	434,217		431,506
	Due after ten years	844,545		842,869
	Other securities with no stated maturity	5,284		5,103
	Total investment securities available-for-sale	$	1,644,805	$	1,639,370
Carrying Value of Securities Pledged As Collateral	'
	The following table summarizes, as of March 31, 2014, the carrying value of securities pledged as collateral to secure public deposits, borrowings and other purposes as permitted or required by law:
		Carrying Amount
		(in thousands)
	Washington and Oregon State to secure public deposits	$	278,061
	Federal Reserve Bank to secure borrowings	42,631
	Other securities pledged	43,038
	Total securities pledged as collateral	$	363,730
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, 2014 and December 31, 2013:
		Less than 12 Months					12 Months or More						Total
		Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
		Value		Losses			Value			Losses			Value		Losses
		(in thousands)
	March 31, 2014
	U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	399,830	$	(7,290	)	$	112,690		$	(10,050	)	$	512,520	$	(17,340	)
	State and municipal securities	88,065		(1,791		)	17,748			(984		)	105,813		(2,775		)
	U.S. government agency and government-sponsored enterprise securities	251,196		(6,026		)	28,810			(1,616		)	280,006		(7,642		)
	U.S. government securities	19,253		(786		)	—			—			19,253		(786		)
	Other securities	2,270		(45		)	2,795			(161		)	5,065		(206		)
	Total	$	760,614	$	(15,938	)	$	162,043		$	(12,811	)	$	922,657	$	(28,749	)
	December 31, 2013
	U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	492,921	$	(10,991	)	$	121,303		$	(12,684	)	$	614,224	$	(23,675	)
	State and municipal securities	112,400		(3,069		)	13,815			(923		)	126,215		(3,992		)
	U.S. government agency and government-sponsored enterprise securities	260,001		(8,063		)	28,447			(2,003		)	288,448		(10,066		)
	U.S. government securities	20,114		(967		)	—			—			20,114		(967		)
	Other securities	2,257		(58		)	2,783			(173		)	5,040		(231		)
	Total	$	887,693	$	(23,148	)	$	166,348		$	(15,783	)	$	1,054,041	$	(38,931	)

Noncovered_Loans_Tables

Noncovered Loans (Tables) (Noncovered Loans [Member])	3 Months Ended
	Mar. 31, 2014
Noncovered Loans [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Analysis of Loan Portfolio by Major Types of Loans	'
	The following is an analysis of the noncovered loan portfolio by major types of loans (net of unearned income):
		March 31,				December 31,
		2014				2013
	Noncovered loans:	(in thousands)
	Commercial business	$	1,601,676			$	1,561,782
	Real estate:
	One-to-four family residential	105,141				108,317
	Commercial and multifamily residential	2,113,609				2,080,075
	Total real estate	2,218,750				2,188,392
	Real estate construction:
	One-to-four family residential	57,310				54,155
	Commercial and multifamily residential	130,809				126,390
	Total real estate construction	188,119				180,545
	Consumer	351,255				357,014
	Less: Net unearned income	(62,724		)		(68,282		)
	Total noncovered loans, net of unearned income	4,297,076				4,219,451
	Less: Allowance for loan and lease losses	(50,442		)		(52,280		)
	Total noncovered loans, net	$	4,246,634			$	4,167,171
	Loans held for sale	$	—			$	735
Analysis of nonaccrual loans	'
	The following is an analysis of noncovered, nonaccrual loans as of March 31, 2014 and December 31, 2013:
		March 31, 2014								December 31, 2013
		Recorded				Unpaid Principal				Recorded			Unpaid Principal
		Investment				Balance				Investment			Balance
		Nonaccrual				Nonaccrual				Nonaccrual			Nonaccrual
		Loans				Loans				Loans			Loans
	Noncovered loans:	(in thousands)
	Commercial business:
	Secured	$	14,255			$	20,481			$	12,433		$	19,186
	Unsecured	286				316				176			202
	Real estate:
	One-to-four family residential	2,900				5,112				2,667			4,678
	Commercial & multifamily residential:
	Commercial land	775				1,101				442			783
	Income property	5,038				6,118				4,267			5,383
	Owner occupied	5,237				7,397				6,334			7,486
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	2,494				5,469				3,246			6,601
	Residential construction	532				2,001				459			1,928
	Consumer	4,880				6,804				3,991			6,187
	Total	$	36,397			$	54,799			$	34,015		$	52,434
Past Due Financing Receivables	'
	The following is an aging of the recorded investment of the noncovered loan portfolio as of March 31, 2014 and December 31, 2013:
		Current				30 - 59				60 - 89			Greater				Total				Nonaccrual		Total Loans
		Loans				Days				Days			than 90				Past Due				Loans
						Past Due				Past Due			Days Past
													Due
	March 31, 2014	(in thousands)
	Noncovered loans:
	Commercial business:
	Secured	$	1,502,131			$	2,526			$	5,448		$	—			$	7,974			$	14,255	$	1,524,360
	Unsecured	71,514				247				116			—				363				286		72,163
	Real estate:
	One-to-four family residential	97,365				2,589				—			—				2,589				2,900		102,854
	Commercial & multifamily residential:
	Commercial land	143,854				666				—			—				666				775		145,295
	Income property	1,175,538				5,951				455			—				6,406				5,038		1,186,982
	Owner occupied	746,749				1,138				132			—				1,270				5,237		753,256
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	9,922				1,164				—			—				1,164				2,494		13,580
	Residential construction	42,699				102				—			—				102				532		43,333
	Commercial & multifamily residential:
	Income property	90,698				—				—			—				—				—		90,698
	Owner occupied	39,388				—				—			—				—				—		39,388
	Consumer	319,391				772				124			—				896				4,880		325,167
	Total	$	4,239,249			$	15,155			$	6,275		$	—			$	21,430			$	36,397	$	4,297,076
		Current				30 - 59				60 - 89			Greater				Total				Nonaccrual		Total Loans
		Loans				Days				Days			than 90				Past Due				Loans
						Past Due				Past Due			Days Past
													Due
	December 31, 2013	(in thousands)
	Noncovered loans:
	Commercial business:
	Secured	$	1,457,820			$	12,713			$	681		$	—			$	13,394			$	12,433	$	1,483,647
	Unsecured	72,255				156				17			—				173				176		72,604
	Real estate:
	One-to-four family residential	100,591				1,993				641			—				2,634				2,667		105,892
	Commercial & multifamily residential:
	Commercial land	142,034				—				358			—				358				442		142,834
	Income property	1,138,732				144				3,289			—				3,433				4,267		1,146,432
	Owner occupied	749,561				4,714				—			—				4,714				6,334		760,609
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	8,225				199				—			—				199				3,246		11,670
	Residential construction	41,533				—				—			—				—				459		41,992
	Commercial & multifamily residential:
	Income property	86,521				—				—			—				—				—		86,521
	Owner occupied	38,916				—				—			—				—				—		38,916
	Consumer	322,685				835				823			—				1,658				3,991		328,334
	Total	$	4,158,873			$	20,754			$	5,809		$	—			$	26,563			$	34,015	$	4,219,451
Impaired Financing Receivables	'
	The following is an analysis of impaired loans as of March 31, 2014 and December 31, 2013:
		Recorded Investment				Recorded Investment				Impaired Loans With											Impaired Loans Without
		of Loans				of Loans				Recorded Allowance											Recorded Allowance
		Collectively Measured				Individually
		for Contingency				Measured for
		Provision				Specific
						Impairment				Recorded			Unpaid				Related				Recorded		Unpaid
										Investment			Principal				Allowance				Investment		Principal
													Balance										Balance
	March 31, 2014	(in thousands)
	Noncovered loans:
	Commercial business:
	Secured	$	1,516,983			$	7,377			$	3,202		$	3,235			$	1,521			$	4,175	$	4,715
	Unsecured	72,136				27				27			27				27				—		—
	Real estate:
	One-to-four family residential	100,762				2,092				437			476				133				1,655		2,812
	Commercial & multifamily residential:
	Commercial land	145,188				107				—			—				—				107		398
	Income property	1,180,523				6,459				—			—				—				6,459		8,968
	Owner occupied	743,984				9,272				593			592				38				8,679		13,042
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	12,386				1,194				113			112				71				1,081		1,456
	Residential construction	43,333				—				—			—				—				—		—
	Commercial & multifamily residential:
	Income property	90,698				—				—			—				—				—		—
	Owner occupied	39,388				—				—			—				—				—		—
	Consumer	325,008				159				21			26				3				138		204
	Total	$	4,270,389			$	26,687			$	4,393		$	4,468			$	1,793			$	22,294	$	31,595
		Recorded Investment				Recorded Investment				Impaired Loans With											Impaired Loans Without
		of Loans				of Loans				Recorded Allowance											Recorded Allowance
		Collectively Measured				Individually
		for Contingency				Measured for
		Provision				Specific
						Impairment				Recorded			Unpaid				Related				Recorded		Unpaid
										Investment			Principal				Allowance				Investment		Principal
													Balance										Balance
	December 31, 2013	(in thousands)
	Noncovered loans:
	Commercial business:
	Secured	$	1,478,560			$	5,087			$	2,866		$	2,885			$	343			$	2,221	$	2,560
	Unsecured	72,569				35				35			35				35				—		—
	Real estate:
	One-to-four family residential	104,272				1,620				442			479				138				1,178		2,119
	Commercial & multifamily residential:
	Commercial land	142,719				115				—			—				—				115		398
	Income property	1,140,019				6,413				918			933				26				5,495		7,885
	Owner occupied	749,601				11,008				3,802			3,817				1,073				7,206		10,464
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	9,726				1,944				113			113				71				1,831		2,587
	Residential construction	41,992				—				—			—				—				—		—
	Commercial & multifamily residential:
	Income property	86,521				—				—			—				—				—		—
	Owner occupied	38,916				—				—			—				—				—		—
	Consumer	328,167				167				23			27				4				144		210
	Total	$	4,193,062			$	26,389			$	8,199		$	8,289			$	1,690			$	18,190	$	26,223
	The following table provides additional information on impaired loans for the three month periods indicated.
		Three Months Ended March 31,
		2014								2013
		Average Recorded				Interest Recognized				Average Recorded			Interest Recognized
		Investment				on				Investment			on
		Impaired Loans				Impaired Loans				Impaired Loans			Impaired Loans
Noncovered loans:	(in thousands)
Commercial business:
Secured	$	6,232			$	17			$	4,917		$	4
Unsecured	31				—				88			1
Real estate:
One-to-four family residential	1,856				13				1,816			4
Commercial & multifamily residential:
Commercial land	111				—				2,714			—
Income property	6,436				62				8,710			29
Owner occupied	10,140				241				11,620			279
Real estate construction:
One-to-four family residential:
Land and acquisition	1,569				1				2,700			1
Residential construction	—				—				1,051			2
Consumer	163				2				127			2
Total	$	26,538			$	336			$	33,743		$	322
Analysis of loans classified as Troubled Debt Restructurings (bTDRb)	'
	The following is an analysis of loans classified as TDR during the three months ended March 31, 2014 and 2013:
		Three months ended March 31, 2014										Three months ended March 31, 2013
		Number of TDR Modifications			Pre-Modification				Post-Modification			Number of TDR Modifications			Pre-Modification				Post-Modification
					Outstanding				Outstanding						Outstanding				Outstanding
					Recorded				Recorded						Recorded				Recorded
					Investment				Investment						Investment				Investment
	Noncovered loans:	(dollars in thousands)
	Commercial business:
	Secured	2			$	546			$	546		—			$	—			$	—
	Real estate:
	One-to-four family residential	2			494				494			—			—				—
	Commercial and multifamily residential:
	Income property	1			143				126			—			—				—
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	—			$	—			$	—		1			117				117
	Total	5			$	1,183			$	1,166		1			$	117			$	117

Allowance_for_Noncovered_Loan_1

Allowance for Noncovered Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Tables)	3 Months Ended
	Mar. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]	'
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,
		2014			2013
		(in thousands)
	Balance at beginning of period	$	2,505		$	1,915
	Net changes in the allowance for unfunded commitments and letters of credit	(50		)	—
	Balance at end of period	$	2,455		$	1,915
Financing Receivable Credit Quality Indicators	'
	The following is an analysis of the credit quality of our covered loan portfolio as of March 31, 2014 and December 31, 2013:
		Pass			Special Mention			Substandard		Doubtful			Loss		Total
	March 31, 2014	(in thousands)
	Covered loans:
	Commercial business:
	Secured	$	44,916		$	1,276		$	15,549	$	—		$	—	$	61,741
	Unsecured	2,728			396			80		—			—		3,204
	Real estate:
	One-to-four family residential	32,729			1,828			4,499		—			—		39,056
	Commercial and multifamily residential:
	Commercial land	10,487			—			7,740		—			—		18,227
	Income property	58,519			3,945			7,557		—			—		70,021
	Owner occupied	65,389			814			9,525		—			—		75,728
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	4,036			—			1,579		—			—		5,615
	Residential construction	2,973			—			2,381		—			—		5,354
	Commercial and multifamily residential:
	Income property	3,761			—			1,523		—			—		5,284
	Owner occupied	1,065			—			—		—			—		1,065
	Consumer	29,657			—			2,857		27			—		32,541
	Total	$	256,260		$	8,259		$	53,290	$	27		$	—	317,836
	Less:
	Valuation discount resulting from acquisition accounting														37,549
	Allowance for loan losses														20,129
	Covered loans, net														$	260,158
		Pass			Special Mention			Substandard		Doubtful			Loss		Total
	December 31, 2013	(in thousands)
	Covered loans:
	Commercial business:
	Secured	$	48,510		$	2,849		$	18,291	$	—		$	—	$	69,650
	Unsecured	2,732			396			92		—			—		3,220
	Real estate:
	One-to-four family residential	35,066			1,842			4,734		—			—		41,642
	Commercial and multifamily residential:
	Commercial land	10,778			198			7,589		—			—		18,565
	Income property	55,985			3,950			10,657		—			—		70,592
	Owner occupied	67,653			111			13,958		—			—		81,722
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	4,674			2,739			1,936		—			—		9,349
	Residential construction	3,008			—			2,424		—			—		5,432
	Commercial and multifamily residential:
	Income property	3,806			—			1,709		—			—		5,515
	Owner occupied	1,074			—			280		—			—		1,354
	Consumer	30,722			33			3,319		27			—		34,101
	Total	$	264,008		$	12,118		$	64,989	$	27		$	—	341,142
	Less:
	Valuation discount resulting from acquisition accounting														43,297
	Allowance for loan losses														20,174
	Covered loans, net														$	277,671
Noncovered Loans [Member]	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'
Allowance for Credit Losses on Financing Receivables	'
	The following tables show a detailed analysis of the allowance for loan and lease losses for noncovered loans for the three months ended March 31, 2014 and 2013:
		Beginning			Charge-offs			Recoveries		Provision (Recovery)			Ending		Specific		General
		Balance											Balance		Reserve		Allocation
	Three months ended March 31, 2014	(in thousands)
	Noncovered loans:
	Commercial business:
	Secured	$	31,027		$	(198	)	$	448	$	(2,476	)	$	28,801	$	1,521	$	27,280
	Unsecured	696			(35		)	42		43			746		27		719
	Real estate:
	One-to-four family residential	1,252			(207		)	28		121			1,194		133		1,061
	Commercial & multifamily residential:
	Commercial land	489			—			17		73			579		—		579
	Income property	9,234			—			13		860			10,107		—		10,107
	Owner occupied	3,605			(1,023		)	9		1,969			4,560		38		4,522
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	610			—			39		(69		)	580		71		509
	Residential construction	822			—			3		(129		)	696		—		696
	Commercial & multifamily residential:
	Income property	285			—			—		35			320		—		320
	Owner occupied	58			—			—		96			154		—		154
	Consumer	2,547			(727		)	253		564			2,637		3		2,634
	Unallocated	1,655			—			—		(1,587		)	68		—		68
	Total	$	52,280		$	(2,190	)	$	852	$	(500	)	$	50,442	$	1,793	$	48,649
		Beginning			Charge-offs			Recoveries		Provision (Recovery)			Ending		Specific		General
		Balance											Balance		Reserve		Allocation
	Three months ended March 31, 2013	(in thousands)
	Noncovered loans:
	Commercial business:
	Secured	$	27,270		$	(988	)	$	79	$	510		$	26,871	$	67	$	26,804
	Unsecured	753			(326		)	34		289			750		84		666
	Real estate:
	One-to-four family residential	694			(116		)	—		79			657		108		549
	Commercial & multifamily residential:
	Commercial land	460			—			10		(37		)	433		—		433
	Income property	11,033			(783		)	79		(918		)	9,411		18		9,393
	Owner occupied	6,362			—			4		(908		)	5,458		34		5,424
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	1,171			(32		)	2,139		(2,288		)	990		74		916
	Residential construction	635			(101		)	—		4			538		—		538
	Commercial & multifamily residential:
	Income property	316			—			—		66			382		—		382
	Owner occupied	102			—			—		6			108		—		108
	Consumer	2,437			(171		)	47		51			2,364		—		2,364
	Unallocated	1,011			—			—		2,146			3,157		—		3,157
	Total	$	52,244		$	(2,517	)	$	2,392	$	(1,000	)	$	51,119	$	385	$	50,734
Financing Receivable Credit Quality Indicators	'
	The following is an analysis of the credit quality of our noncovered loan portfolio as of March 31, 2014 and December 31, 2013:
		Pass			Special Mention			Substandard		Doubtful			Loss		Total
	March 31, 2014	(in thousands)
	Noncovered loans:
	Commercial business:
	Secured	$	1,422,773		$	42,648		$	58,778	$	161		$	—	$	1,524,360
	Unsecured	71,654			199			310		—			—		72,163
	Real estate:
	One-to-four family residential	97,004			1,448			4,402		—			—		102,854
	Commercial and multifamily residential:
	Commercial land	139,910			—			5,385		—			—		145,295
	Income property	1,150,595			974			35,413		—			—		1,186,982
	Owner occupied	739,956			1,443			11,857		—			—		753,256
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	9,928			—			3,652		—			—		13,580
	Residential construction	38,413			2,120			2,800		—			—		43,333
	Commercial and multifamily residential:
	Income property	90,235			—			463		—			—		90,698
	Owner occupied	38,973			415			—		—			—		39,388
	Consumer	318,977			—			6,185		5			—		325,167
	Total	$	4,118,418		$	49,247		$	129,245	$	166		$	—	4,297,076
	Less:
	Allowance for loan and lease losses														50,442
	Noncovered loans, net														$	4,246,634
		Pass			Special Mention			Substandard		Doubtful			Loss		Total
	December 31, 2013	(in thousands)
	Noncovered loans:
	Commercial business:
	Secured	$	1,372,038		$	43,309		$	68,300	$	—		$	—	$	1,483,647
	Unsecured	72,226			199			179		—			—		72,604
	Real estate:
	One-to-four family residential	98,626			1,567			5,699		—			—		105,892
	Commercial and multifamily residential:
	Commercial land	137,850			—			4,984		—			—		142,834
	Income property	1,108,033			5,473			32,926		—			—		1,146,432
	Owner occupied	748,725			—			11,884		—			—		760,609
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	7,526			—			4,144		—			—		11,670
	Residential construction	36,270			2,352			3,370		—			—		41,992
	Commercial and multifamily residential:
	Income property	86,206			—			315		—			—		86,521
	Owner occupied	38,916			—			—		—			—		38,916
	Consumer	321,348			331			6,188		467			—		328,334
	Total	$	4,027,764		$	53,231		$	137,989	$	467		$	—	4,219,451
	Less:
	Allowance for loan and lease losses														52,280
	Noncovered loans, net														$	4,167,171

Changes_in_Noncovered_Other_Re1

Changes in Noncovered Other Real Estate Owned (Tables)	3 Months Ended
	Mar. 31, 2014
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]	'
Summary of Noncovered Other Real Estate Owned	'
	The following tables set forth activity in noncovered OREO for the three months ended March 31, 2014 and 2013:
		Three Months Ended March 31,
		2014			2013
		(in thousands)
	Noncovered OREO:
	Balance at beginning of period	$	23,834		$	10,676
	Transfers in, net of write-downs ($0 and $32, respectively)	244			2,709
	Additional OREO write-downs	(929		)	(93		)
	Proceeds from sale of OREO property	(8,102		)	(1,565		)
	Gain on sale of OREO, net	793			189
	Total noncovered OREO at end of period	$	15,840		$	11,916

Covered_Assets_and_FDIC_Losssh1

Covered Assets and FDIC Loss-sharing Asset (Tables)	3 Months Ended
	Mar. 31, 2014
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'
Analysis and Allowance for Losses on Covered Loans	'
	The following is an analysis of our covered loans, net of related allowance for losses as of March 31, 2014 and December 31, 2013:
		March 31, 2014			December 31, 2013
	Covered loans:	(dollars in thousands)
	Commercial business	$	64,945		$	72,870
	Real estate:
	One-to-four family residential	39,056			41,642
	Commercial and multifamily residential	163,976			170,879
	Total real estate	203,032			212,521
	Real estate construction:
	One-to-four family residential	10,969			14,781
	Commercial and multifamily residential	6,349			6,869
	Total real estate construction	17,318			21,650
	Consumer	32,541			34,101
	Subtotal of covered loans	317,836			341,142
	Less:
	Valuation discount resulting from acquisition accounting	37,549			43,297
	Allowance for loan losses	20,129			20,174
	Covered loans, net of allowance for loan losses	$	260,158		$	277,671
Changes in Accretable Yield for Acquired Loans	'
	The following table shows the changes in accretable yield for acquired loans for the three months ended March 31, 2014 and 2013:
		Three Months Ended March 31,
		2014			2013
		(in thousands)
	Balance at beginning of period	$	103,907		$	166,888
	Accretion	(10,569		)	(14,477		)
	Disposals	(2,826		)	(774		)
	Reclassifications from nonaccretable difference	11,031			7,149
	Balance at end of period	$	101,543		$	158,786
Financing Receivable Credit Quality Indicators	'
	The following is an analysis of the credit quality of our covered loan portfolio as of March 31, 2014 and December 31, 2013:
		Pass			Special Mention			Substandard		Doubtful		Loss		Total
	March 31, 2014	(in thousands)
	Covered loans:
	Commercial business:
	Secured	$	44,916		$	1,276		$	15,549	$	—	$	—	$	61,741
	Unsecured	2,728			396			80		—		—		3,204
	Real estate:
	One-to-four family residential	32,729			1,828			4,499		—		—		39,056
	Commercial and multifamily residential:
	Commercial land	10,487			—			7,740		—		—		18,227
	Income property	58,519			3,945			7,557		—		—		70,021
	Owner occupied	65,389			814			9,525		—		—		75,728
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	4,036			—			1,579		—		—		5,615
	Residential construction	2,973			—			2,381		—		—		5,354
	Commercial and multifamily residential:
	Income property	3,761			—			1,523		—		—		5,284
	Owner occupied	1,065			—			—		—		—		1,065
	Consumer	29,657			—			2,857		27		—		32,541
	Total	$	256,260		$	8,259		$	53,290	$	27	$	—	317,836
	Less:
	Valuation discount resulting from acquisition accounting													37,549
	Allowance for loan losses													20,129
	Covered loans, net													$	260,158
		Pass			Special Mention			Substandard		Doubtful		Loss		Total
	December 31, 2013	(in thousands)
	Covered loans:
	Commercial business:
	Secured	$	48,510		$	2,849		$	18,291	$	—	$	—	$	69,650
	Unsecured	2,732			396			92		—		—		3,220
	Real estate:
	One-to-four family residential	35,066			1,842			4,734		—		—		41,642
	Commercial and multifamily residential:
	Commercial land	10,778			198			7,589		—		—		18,565
	Income property	55,985			3,950			10,657		—		—		70,592
	Owner occupied	67,653			111			13,958		—		—		81,722
	Real estate construction:
	One-to-four family residential:
	Land and acquisition	4,674			2,739			1,936		—		—		9,349
	Residential construction	3,008			—			2,424		—		—		5,432
	Commercial and multifamily residential:
	Income property	3,806			—			1,709		—		—		5,515
	Owner occupied	1,074			—			280		—		—		1,354
	Consumer	30,722			33			3,319		27		—		34,101
	Total	$	264,008		$	12,118		$	64,989	$	27	$	—	341,142
	Less:
	Valuation discount resulting from acquisition accounting													43,297
	Allowance for loan losses													20,174
	Covered loans, net													$	277,671
Covered OREO at Carrying Value	'
	The following table sets forth activity in covered OREO at carrying value for the three months ended March 31, 2014 and 2013:
		Three Months Ended March 31,
		2014			2013
		(in thousands)
	Covered OREO:
	Balance at beginning of period	$	12,093		$	16,311
	Transfers in	5,507			1,405
	Additional OREO write-downs	(651		)	(65		)
	Proceeds from sale of OREO property	(3,103		)	(6,438		)
	Net gain on sale of OREO	866			2,598
	Total covered OREO at end of period	$	14,712		$	13,811
FDIC Loss-sharing Asset	'
	The following table shows a detailed analysis of the FDIC loss-sharing asset for the three months ended March 31, 2014 and 2013:
		Three Months Ended March 31,
		2014			2013
		(in thousands)
	Balance at beginning of period	$	39,846		$	96,354
	Adjustments not reflected in income:
	Cash payments to (from) the FDIC	1,678			(3,119		)
	FDIC reimbursable losses, net	132			363
	Adjustments reflected in income:
	Amortization, net	(6,452		)	(9,779		)
	Loan impairment	1,938			784
	Sale of other real estate	(756		)	(1,346		)
	Write-downs of other real estate	516			52
	Other	(65		)	(194		)
	Balance at end of period	$	36,837		$	83,115
Covered Loans [Member]	'
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'
Allowance for Credit Losses on Financing Receivables	'
	The changes in the ALLL for covered loans for the three months ended March 31, 2014 and 2013 are summarized as follows:
		Three Months Ended March 31,
		2014			2013
		(in thousands)
	Balance at beginning of period	$	20,174		$	30,056
	Loans charged off	(4,273		)	(2,382		)
	Recoveries	1,806			835
	Provision for loan losses	2,422			980
	Balance at end of period	$	20,129		$	29,489

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2014
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,
		2014			2013
		(in thousands)
	Total goodwill (1)	343,952			115,554
	Other intangible assets, net
	Core deposit intangible:
	Gross core deposit intangible balance at beginning of period (1)	47,698			32,441
	Accumulated amortization at beginning of period	(22,765		)	(16,720		)
	Core deposit intangible, net at beginning of period	24,933			15,721
	CDI current period amortization	(1,579		)	(1,028		)
	Total core deposit intangible, net at end of period	23,354			14,693
	Intangible assets not subject to amortization	919			—
	Other intangible assets, net at end of period	24,273			14,693
	Total goodwill and other intangible assets at end of period	$	368,225		$	130,247
Estimated Future Amortization Expense of Core Deposit Intangibles	'
	__________
	(1) See Note 3, Business Combinations, for additional information regarding goodwill and intangible assets recorded related to the acquisition of West Coast on April 1, 2013.
	The following table provides the estimated future amortization expense of core deposit intangibles for the remaining nine months ending December 31, 2014 and the succeeding four years:
		Amount
		(in thousands)
	Year ending December 31,
	2014	$	4,383
	2015	4,934
	2016	4,195
	2017	3,361
	2018	2,500

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2014
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, 2014 and 2013:
		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, 2014	(in thousands)
	Beginning balance	$	(10,108	)	$	(1,936	)	$	(12,044	)
	Other comprehensive income before reclassifications	7,119			—			7,119
	Amounts reclassified from accumulated other comprehensive loss (2)	(142		)	24			(118		)
	Net current-period other comprehensive income	6,977			24			7,001
	Ending balance	$	(3,131	)	$	(1,912	)	$	(5,043	)
	Three months ended March 31, 2013
	Beginning balance	$	20,918		$	(769	)	$	20,149
	Other comprehensive loss before reclassifications	(2,493		)	(757		)	(3,250		)
	Amounts reclassified from accumulated other comprehensive income (2)	(240		)	60			(180		)
	Net current-period other comprehensive loss	(2,733		)	(697		)	(3,430		)
	Ending balance	$	18,185		$	(1,466	)	$	16,719
	__________
	(1) All amounts are net of tax. Amounts in parenthesis indicate debits.
	(2) See following table for details about these reclassifications.
Schedule of reclassifications from accumulated other comprehensive income [Table Text Block]	'
	The following table shows details regarding the reclassifications from accumulated other comprehensive income for the three month periods ended March 31, 2014 and 2013:
		Amount Reclassified from Accumulated Other Comprehensive Loss						Affected line Item in the Consolidated Statement of Income
		Three Months Ended March 31,
		2014			2013
		(in thousands)
	Unrealized gains and losses on available-for-sale securities
	Investment securities gains	$	223		$	370		Investment securities gains, net
		223			370			Total before tax
		(81		)	(130		)	Income tax provision
		$	142		$	240		Net of tax
	Amortization of pension plan liability
	Actuarial losses	$	(37	)	$	(92	)	Compensation and employee benefits
		(37		)	(92		)	Total before tax
		13			32			Income tax benefit
		$	(24	)	$	(60	)	Net of tax

Derivatives_and_Balance_Sheet_1

Derivatives and Balance Sheet Offsetting (Tables) (Not Designated as Hedging Instrument [Member])

3 Months Ended

Mar. 31, 2014

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, 2014 and December 31, 2013:

Asset Derivatives

Liability Derivatives

March 31, 2014

December 31, 2013

March 31, 2014

December 31, 2013

Balance Sheet

Fair Value

Balance Sheet

Fair Value

Balance Sheet

Fair Value

Balance Sheet

Fair Value

Location

Location

Location

Location

(in thousands)

Interest rate contracts

Other assets

$

9,418

Other assets

$

9,044

Other liabilities

$

9,418

Other liabilities

$

9,044

Fair_Value_Accounting_and_Meas1

Fair Value Accounting and Measurement (Tables)	3 Months Ended
	Mar. 31, 2014
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, 2014 and December 31, 2013 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, 2014	(in thousands)
	Assets
	Securities available for sale:
	U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations	$	912,298	$	—		$	912,298	$	—
	State and municipal debt securities	373,680		—			373,680		—
	U.S. government agency and government-sponsored enterprise securities	327,986		—			327,986		—
	U.S. government securities	20,303		20,303			—		—
	Other securities	5,103		—			5,103		—
	Total securities available for sale	$	1,639,370	$	20,303		$	1,619,067	$	—
	Other assets (Interest rate contracts)	$	9,418	$	—		$	9,418	$	—
	Liabilities
	Other liabilities (Interest rate contracts)	$	9,418	$	—		$	9,418	$	—
		Fair value		Fair Value Measurements at Reporting Date Using
				Level 1			Level 2		Level 3
	December 31, 2013	(in thousands)
	Assets
	Securities available for sale:
	U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations	$	948,408	$	—		$	948,408	$	—
	State and municipal debt securities	364,470		—			364,470		—
	U.S. government agency and government-sponsored enterprise securities	326,039		—			326,039		—
	U.S. government securities	20,114		20,114			—		—
	Other securities	5,080		—			5,080		—
	Total securities available for sale	$	1,664,111	$	20,114		$	1,643,997	$	—
	Other assets (Interest rate contracts)	$	9,044	$	—		$	9,044	$	—
	Liabilities
	Other liabilities (Interest rate contracts)	$	9,044	$	—		$	9,044	$	—
Financial Assets Accounted For Fair Value On Nonrecurring Basis	'
	The following tables set forth the Company's assets that were measured using fair value estimates on a nonrecurring basis during the periods ended March 31, 2014 and 2013:
		Fair value at March 31, 2014		Fair Value Measurements at Reporting Date Using							Losses During the Three Months Ended
				Level 1			Level 2		Level 3		March 31, 2014
		(in thousands)
	Impaired loans	$	2,094	$	—		$	—	$	2,094	$	1,387
	Noncovered OREO	1,749		—			—		1,749		687
	Covered OREO	4,376		—			—		4,376		616
		$	8,219	$	—		$	—	$	8,219	$	2,690
		Fair value at		Fair Value Measurements at Reporting Date Using							Losses During the Three Months Ended
		March 31, 2013		Level 1			Level 2		Level 3		31-Mar-13
		(in thousands)
	Impaired loans	$	477	$	—		$	—	$	477	$	102
	Noncovered OREO	1,350		—			—		1,350		101
	Covered OREO	65		—			—		65		65
		$	1,892	$	—		$	—	$	1,892	$	268
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, 2014 and December 31, 2013:
		March 31, 2014
		Carrying		Fair			Level 1		Level 2		Level 3
		Amount		Value
		(in thousands)
	Assets
	Cash and due from banks	$	191,706	$	191,706		$	191,706	$	—	$	—
	Interest-earning deposits with banks	45,083		45,083			45,083		—		—
	Securities available for sale	1,639,370		1,639,370			20,303		1,619,067		—
	FHLB stock	32,224		32,224			—		32,224		—
	Loans	4,506,792		4,654,744			—		—		4,654,744
	FDIC loss-sharing asset	36,837		13,512			—		—		13,512
	Interest rate contracts	9,418		9,418			—		9,418		—
	Liabilities
	Deposits	$	6,044,416	$	6,043,226		$	5,554,663	$	488,563	$	—
	FHLB Advances	6,597		5,452			—		5,452		—
	Repurchase agreements	25,000		26,303			—		26,303		—
	Interest rate contracts	9,418		9,418			—		9,418		—
		December 31, 2013
		Carrying		Fair			Level 1		Level 2		Level 3
		Amount		Value
		(in thousands)
	Assets
	Cash and due from banks	$	165,030	$	165,030		$	165,030	$	—	$	—
	Interest-earning deposits with banks	14,531		14,531			14,531		—		—
	Securities available for sale	1,664,111		1,664,111			20,114		1,643,997		—
	FHLB stock	32,529		32,529			—		32,529		—
	Loans held for sale	735		735			—		735		—
	Loans	4,444,842		4,605,038			—		—		4,605,038
	FDIC loss-sharing asset	39,846		11,248			—		—		11,248
	Interest rate contracts	9,044		9,044			—		9,044		—
	Liabilities
	Deposits	$	5,959,475	$	5,958,747		$	5,449,546	$	509,201	$	—
	FHLB Advances	36,606		35,080			—		35,080		—
	Repurchase agreements	25,000		26,361			—		26,361		—
	Interest rate contracts	9,044		9,044			—		9,044		—
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 March 31, 2014		Valuation Technique		Unobservable Input	Range (Weighted Average) (1)
		(dollars in thousands)
	Impaired loans - real estate collateral	$	990	Fair Market Value of Collateral		Adjustment to Appraisal Value	N/A (2)
	Impaired loans - other collateral (3)	1,104		Fair Market Value of Collateral		Adjustment to Stated value	0% - 100% (68%)
	Noncovered OREO	$	1,749	Fair Market Value of Collateral		Adjustment to Appraisal Value	N/A (2)
	Covered OREO	4,376		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 collateralized by real estate, noncovered OREO and covered OREO because there were no adjustments made to the appraisal value during the current period.
	(3) Other collateral consists of accounts receivable, inventory and equipment.
		Fair value at		Valuation Technique		Unobservable Input	Range (Weighted Average) (1)
		March 31, 2013
		(dollars in thousands)
	Impaired loans	$	477	Fair Market Value of Collateral		Adjustment to Appraisal Value	N/A (2)
	Noncovered OREO	1,350		Fair Market Value of Collateral		Adjustment to Appraisal Value	N/A (2)
	Covered OREO	65		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 collateralized by real estate, noncovered OREO and covered 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, 2014
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, 2014 and 2013:
		Three Months Ended
		March 31,
		2014		2013
		(in thousands except per share)
	Basic EPS:
	Net income	$	19,844	$	12,176
	Less: Earnings allocated to participating securities
	Preferred shares	40		—
	Nonvested restricted shares	169		123
	Earnings allocated to common shareholders	$	19,635	$	12,053
	Weighted average common shares outstanding	51,097		39,348
	Basic earnings per common share	$	0.38	$	0.31
	Diluted EPS:
	Earnings allocated to common shareholders	$	19,639	$	12,053
	Weighted average common shares outstanding	51,097		39,348
	Dilutive effect of equity awards	1,336		3
	Weighted average diluted common shares outstanding	52,433		39,351
	Diluted earnings per common share	$	0.37	$	0.31
	Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive	83		9

Business_combinations_Details

Business combinations (Details) (USD $)	0 Months Ended	3 Months Ended
	Apr. 02, 2013	Mar. 31, 2014	Mar. 31, 2013
Business Acquisition [Line Items]	'	'	'
Business Acquisition, Percentage of Voting Interests Acquired	100.00%	'	'
West Coast Bancorp [Member]	'	'	'
Business Acquisition [Line Items]	'	'	'
Business Acquisition, Effective Date of Acquisition	1-Apr-13	'	'
Business Acquisition, Cost of Acquired Entity, Purchase Price	$540,800,000	'	'
Business Combination, Acquired Receivables, Fair Value	1,410,000,000	'	'
Business Acquisition, Purchase Price Allocation, Goodwill Amount	228,400,000	'	'
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	15,300,000	'	'
Business Acquisition, Purchase Price Allocation, Liabilities, Deposits	-1,880,000,000	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	312,400,000	'	'
Business Combination, Acquisition Related Costs	'	$966,000	$723,000

Securities_Securities_Availabl

Securities (Securities Available for Sale) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	$1,644,805	$1,680,491
Available-for-sale Securities, Gross Unrealized Gain, instant	23,314	22,551
Gross Unrealized Losses	28,749	38,931
Fair Value	1,639,370	1,664,111
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	919,299	961,442
Available-for-sale Securities, Gross Unrealized Gain, instant	10,339	10,640
Gross Unrealized Losses	17,340	23,674
Fair Value	912,298	948,408
State and Municipal Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	363,983	357,013
Available-for-sale Securities, Gross Unrealized Gain, instant	12,472	11,450
Gross Unrealized Losses	2,775	3,993
Fair Value	373,680	364,470
U.S. Government and Government-Sponsored Enterprise Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	335,151	335,671
Available-for-sale Securities, Gross Unrealized Gain, instant	477	434
Gross Unrealized Losses	7,642	10,066
Fair Value	327,986	326,039
US Government Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	21,088	21,081
Available-for-sale Securities, Gross Unrealized Gain, instant	1	0
Gross Unrealized Losses	786	967
Fair Value	20,303	20,114
Other Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	5,284	5,284
Available-for-sale Securities, Gross Unrealized Gain, instant	25	27
Gross Unrealized Losses	206	231
Fair Value	$5,103	$5,080

Securities_Schedule_of_Contrac

Securities (Schedule of Contractual Maturities of Investment Securities Available for Sale) (Details) (USD $)	Mar. 31, 2014
In Thousands, unless otherwise specified
Available-for-sale Securities [Abstract]	'
Due within one year, Amortized Cost	$23,252
Due after one year through five years, Amortized Cost	337,507
Due after five years through ten years, Amortized Cost	434,217
Due after ten years, Amortized Cost	844,545
No stated maturity date, Amortized Cost Basis	5,284
Total investment securities available-for-sale, Amortized Cost	1,644,805
Due within one year, Fair Value	23,415
Due after one year through five years, Fair Value	336,477
Due after five years through ten years, Fair Value	431,506
Due after ten years, Fair Value	842,869
No stated maturity date, Fair Value	5,103
Total investment securities available-for-sale, Fair Value	$1,639,370

Securities_Carrying_Value_of_S

Securities (Carrying Value of Securities Pledged as Collateral) (Details) (USD $)	Mar. 31, 2014
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'
Carrying amount of securities pledged as collateral	$363,730
Washington and Oregon State Public Deposits [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Carrying amount of securities pledged as collateral	278,061
Federal Reserve Bank Advances [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Carrying amount of securities pledged as collateral	42,631
Other Securities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Carrying amount of securities pledged as collateral	$43,038

Securities_Summary_of_Gross_Un

Securities (Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Debt Securities Gross Unrealized Gain, instant	($23,314)	($22,551)
Less than 12 Months Fair Value	760,614	887,693
Less than 12 Months Unrealized Losses	-15,938	-23,148
12 Months or More Fair Value	162,043	166,348
12 Months or More Unrealized Losses	-12,811	-15,783
Total Fair Value	922,657	1,054,041
Total Unrealized Losses	-28,749	-38,931
Available-for-sale Debt Securities, Gross Unrealized Loss, instant	-28,749	-38,931
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	-10,339	-10,640
Less than 12 Months Fair Value	399,830	492,921
Less than 12 Months Unrealized Losses	-7,290	-10,991
12 Months or More Fair Value	112,690	121,303
12 Months or More Unrealized Losses	-10,050	-12,684
Total Fair Value	512,520	614,224
Total Unrealized Losses	-17,340	-23,675
Available-for-sale Debt Securities, Gross Unrealized Loss, instant	-17,340	-23,674
State and Municipal Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Debt Securities Gross Unrealized Gain, instant	-12,472	-11,450
Less than 12 Months Fair Value	88,065	112,400
Less than 12 Months Unrealized Losses	-1,791	-3,069
12 Months or More Fair Value	17,748	13,815
12 Months or More Unrealized Losses	-984	-923
Total Fair Value	105,813	126,215
Total Unrealized Losses	-2,775	-3,992
Available-for-sale Debt Securities, Gross Unrealized Loss, instant	-2,775	-3,993
US Government Corporations and Agencies Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Debt Securities Gross Unrealized Gain, instant	-477	-434
Less than 12 Months Fair Value	251,196	260,001
Less than 12 Months Unrealized Losses	-6,026	-8,063
12 Months or More Fair Value	28,810	28,447
12 Months or More Unrealized Losses	-1,616	-2,003
Total Fair Value	280,006	288,448
Total Unrealized Losses	-7,642	-10,066
Available-for-sale Debt Securities, Gross Unrealized Loss, instant	-7,642	-10,066
US Government Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Debt Securities Gross Unrealized Gain, instant	-1	0
Less than 12 Months Fair Value	19,253	20,114
Less than 12 Months Unrealized Losses	-786	-967
12 Months or More Fair Value	0	0
12 Months or More Unrealized Losses	0	0
Total Fair Value	19,253	20,114
Total Unrealized Losses	-786	-967
Available-for-sale Debt Securities, Gross Unrealized Loss, instant	-786	-967
Other Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Debt Securities Gross Unrealized Gain, instant	-25	-27
Less than 12 Months Fair Value	2,270	2,257
Less than 12 Months Unrealized Losses	-45	-58
12 Months or More Fair Value	2,795	2,783
12 Months or More Unrealized Losses	-161	-173
Total Fair Value	5,065	5,040
Total Unrealized Losses	-206	-231
Available-for-sale Debt Securities, Gross Unrealized Loss, instant	($206)	($231)

Securities_Narrative_Details

Securities (Narrative) (Details)	Mar. 31, 2014
	security
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Number Of Securities In Unrealized Loss Position	70
Number Of Securities In Continuous Loss Position For Twelve Months or More	10
Municipal Bonds [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Number Of Securities In Unrealized Loss Position	113
Number Of Securities In Continuous Loss Position For Twelve Months or More	13
U.S. Government and Government-Sponsored Enterprise Securities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Number Of Securities In Unrealized Loss Position	29
Number Of Securities In Continuous Loss Position For Twelve Months or More	3
US Government Securities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Number Of Securities In Unrealized Loss Position	3
Number Of Securities In Continuous Loss Position For Twelve Months or More	0
Other Securities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Number Of Securities In Unrealized Loss Position	2
Number Of Securities In Continuous Loss Position For Twelve Months or More	1

Noncovered_Loans_Narrative_Det

Noncovered Loans (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
	contract
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Provision for loan and lease losses	$1,922,000	($20,000)	'
Loans to related parties	14,100,000	'	14,200,000
Loans and Leases Receivable, Related Parties, Additions	595,000	'	'
Repayments on related party loans	633,000	'	'
Additional funds committed to lend on loans classified as TDR	182,000	'	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	'	'
Loans Receivable [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	1,090,000,000	'	1,080,000,000
Federal Reserve Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	82,100,000	'	45,200,000
Covered Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Provision for loan and lease losses	$2,422,000	$980,000	'

Noncovered_Loans_Analysis_of_L

Noncovered Loans (Analysis of Loan Portfolio by Major Types of Loans) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Deferred Income	$62,724	$68,282	'	'
Loans, net	4,506,792	4,444,842	'	'
Loans held for sale	0	735	'	'
Noncovered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Deferred Income	62,724	68,282	'	'
Recorded Investment	4,297,076	4,219,451	'	'
Allowance for loan losses	50,442	52,280	51,119	52,244
Loans, net	4,246,634	4,167,171	'	'
Loans held for sale	0	735	'	'
One-to-Four Family Residential [Member] | Noncovered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	105,141	108,317	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	57,310	54,155	'	'
Allowance for loan losses	1,194	1,252	657	694
Commercial and Multifamily Residential [Member] | Noncovered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans Receivable, Gross, Commercial, Mortgage	2,113,609	2,080,075	'	'
Loans Receivable, Gross, Commercial, Construction	130,809	126,390	'	'
Commercial Portfolio Segment [Member] | Noncovered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	1,601,676	1,561,782	'	'
Real Estate Portfolio Segment [Member] | Noncovered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans Receivable Real Estate Mortgage	2,218,750	2,188,392	'	'
Real Estate Construction Portfolio Segment [Member] | Noncovered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans Receivable Real Estate Construction	188,119	180,545	'	'
Consumer Portfolio Segment [Member] | Noncovered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Consumer	351,255	357,014	'	'
Allowance for loan losses	$2,637	$2,547	$2,364	$2,437

Noncovered_Loans_Analysis_of_N

Noncovered Loans (Analysis of Nonaccrual Loans) (Details) (Noncovered Loans [Member], USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded Investment Nonaccrual Loans	$36,397	$34,015
Unpaid Principal Balance Nonaccrual Loans	54,799	52,434
Consumer Portfolio Segment [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded Investment Nonaccrual Loans	4,880	3,991
Unpaid Principal Balance Nonaccrual Loans	6,804	6,187
Secured Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded Investment Nonaccrual Loans	14,255	12,433
Unpaid Principal Balance Nonaccrual Loans	20,481	19,186
Unsecured Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded Investment Nonaccrual Loans	286	176
Unpaid Principal Balance Nonaccrual Loans	316	202
One-to-Four Family Residential [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded Investment Nonaccrual Loans	2,900	2,667
Unpaid Principal Balance Nonaccrual Loans	5,112	4,678
Commercial Land [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded Investment Nonaccrual Loans	775	442
Unpaid Principal Balance Nonaccrual Loans	1,101	783
Income Property Multifamily [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded Investment Nonaccrual Loans	5,038	4,267
Unpaid Principal Balance Nonaccrual Loans	6,118	5,383
Owner Occupied [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded Investment Nonaccrual Loans	5,237	6,334
Unpaid Principal Balance Nonaccrual Loans	7,397	7,486
Land And Acquisition [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded Investment Nonaccrual Loans	2,494	3,246
Unpaid Principal Balance Nonaccrual Loans	5,469	6,601
Residential Construction [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Recorded Investment Nonaccrual Loans	532	459
Unpaid Principal Balance Nonaccrual Loans	$2,001	$1,928

Noncovered_Loans_Analysis_of_t

Noncovered Loans (Analysis of the Aged Loan Portfolio) (Details) (Noncovered Loans [Member], USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current Loans	$4,239,249	$4,158,873
30 - 59 Days Past Due	15,155	20,754
60 - 89 Days Past Due	6,275	5,809
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	21,430	26,563
Nonaccrual Loans	36,397	34,015
Loans Receivable, Net	4,297,076	4,219,451
Consumer Portfolio Segment [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current Loans	319,391	322,685
30 - 59 Days Past Due	772	835
60 - 89 Days Past Due	124	823
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	896	1,658
Nonaccrual Loans	4,880	3,991
Loans Receivable, Net	325,167	328,334
Secured Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current Loans	1,502,131	1,457,820
30 - 59 Days Past Due	2,526	12,713
60 - 89 Days Past Due	5,448	681
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	7,974	13,394
Nonaccrual Loans	14,255	12,433
Loans Receivable, Net	1,524,360	1,483,647
Unsecured Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current Loans	71,514	72,255
30 - 59 Days Past Due	247	156
60 - 89 Days Past Due	116	17
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	363	173
Nonaccrual Loans	286	176
Loans Receivable, Net	72,163	72,604
One-to-Four Family Residential [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current Loans	97,365	100,591
30 - 59 Days Past Due	2,589	1,993
60 - 89 Days Past Due	0	641
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	2,589	2,634
Nonaccrual Loans	2,900	2,667
Loans Receivable, Net	102,854	105,892
Commercial Land [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current Loans	143,854	142,034
30 - 59 Days Past Due	666	0
60 - 89 Days Past Due	0	358
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	666	358
Nonaccrual Loans	775	442
Loans Receivable, Net	145,295	142,834
Income Property Multifamily [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current Loans	1,175,538	1,138,732
30 - 59 Days Past Due	5,951	144
60 - 89 Days Past Due	455	3,289
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	6,406	3,433
Nonaccrual Loans	5,038	4,267
Loans Receivable, Net	1,186,982	1,146,432
Owner Occupied Construction [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current Loans	39,388	38,916
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Nonaccrual Loans	0	0
Loans Receivable, Net	39,388	38,916
Owner Occupied [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current Loans	746,749	749,561
30 - 59 Days Past Due	1,138	4,714
60 - 89 Days Past Due	132	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	1,270	4,714
Nonaccrual Loans	5,237	6,334
Loans Receivable, Net	753,256	760,609
Land And Acquisition [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current Loans	9,922	8,225
30 - 59 Days Past Due	1,164	199
60 - 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	1,164	199
Nonaccrual Loans	2,494	3,246
Loans Receivable, Net	13,580	11,670
Residential Construction [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current Loans	42,699	41,533
30 - 59 Days Past Due	102	0
60 - 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	102	0
Nonaccrual Loans	532	459
Loans Receivable, Net	43,333	41,992
Income Property Multifamily Construction [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current Loans	90,698	86,521
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Nonaccrual Loans	0	0
Loans Receivable, Net	$90,698	$86,521

Noncovered_Loans_Analysis_of_I

Noncovered Loans (Analysis of Impaired Loans) (Details) (Noncovered Loans [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment of Loans Collectively Measured for Contingency Provision	$4,270,389	'	$4,193,062
Recorded Investment of Loans Individually Measured for Specific Impairment	26,687	'	26,389
Recorded Investment	21	'	23
Unpaid Principal Balance	26	'	27
Related Allowance	3	'	4
Average Recorded Investment Impaired Loans	26,538	33,743	'
Interest Recognized on Impaired Loans	336	322	'
Income Property Multifamily Construction [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment of Loans Collectively Measured for Contingency Provision	90,698	'	86,521
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	325,008	'	328,167
Recorded Investment of Loans Individually Measured for Specific Impairment	159	'	167
Average Recorded Investment Impaired Loans	163	127	'
Interest Recognized on Impaired Loans	2	2	'
Residential Construction [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment of Loans Collectively Measured for Contingency Provision	43,333	'	41,992
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	1,051	'
Interest Recognized on Impaired Loans	0	2	'
Land And Acquisition [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment of Loans Collectively Measured for Contingency Provision	12,386	'	9,726
Recorded Investment of Loans Individually Measured for Specific Impairment	1,194	'	1,944
Recorded Investment	113	'	113
Unpaid Principal Balance	112	'	113
Related Allowance	71	'	71
Average Recorded Investment Impaired Loans	1,569	2,700	'
Interest Recognized on Impaired Loans	1	1	'
Owner Occupied [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment of Loans Collectively Measured for Contingency Provision	743,984	'	749,601
Recorded Investment of Loans Individually Measured for Specific Impairment	9,272	'	11,008
Recorded Investment	593	'	3,802
Unpaid Principal Balance	592	'	3,817
Related Allowance	38	'	1,073
Average Recorded Investment Impaired Loans	10,140	11,620	'
Interest Recognized on Impaired Loans	241	279	'
Owner Occupied Construction [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment of Loans Collectively Measured for Contingency Provision	39,388	'	38,916
Recorded Investment of Loans Individually Measured for Specific Impairment	0	'	0
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Income Property Multifamily [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,180,523	'	1,140,019
Recorded Investment of Loans Individually Measured for Specific Impairment	6,459	'	6,413
Recorded Investment	0	'	918
Unpaid Principal Balance	0	'	933
Related Allowance	0	'	26
Average Recorded Investment Impaired Loans	6,436	8,710	'
Interest Recognized on Impaired Loans	62	29	'
Commercial Land [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment of Loans Collectively Measured for Contingency Provision	145,188	'	142,719
Recorded Investment of Loans Individually Measured for Specific Impairment	107	'	115
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Average Recorded Investment Impaired Loans	111	2,714	'
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	100,762	'	104,272
Recorded Investment of Loans Individually Measured for Specific Impairment	2,092	'	1,620
Recorded Investment	437	'	442
Unpaid Principal Balance	476	'	479
Related Allowance	133	'	138
Average Recorded Investment Impaired Loans	1,856	1,816	'
Interest Recognized on Impaired Loans	13	4	'
Unsecured Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment of Loans Collectively Measured for Contingency Provision	72,136	'	72,569
Recorded Investment of Loans Individually Measured for Specific Impairment	27	'	35
Recorded Investment	27	'	35
Unpaid Principal Balance	27	'	35
Related Allowance	27	'	35
Average Recorded Investment Impaired Loans	31	88	'
Interest Recognized on Impaired Loans	0	1	'
Secured Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,516,983	'	1,478,560
Recorded Investment of Loans Individually Measured for Specific Impairment	7,377	'	5,087
Recorded Investment	3,202	'	2,866
Unpaid Principal Balance	3,235	'	2,885
Related Allowance	1,521	'	343
Average Recorded Investment Impaired Loans	6,232	4,917	'
Interest Recognized on Impaired Loans	17	4	'
Impaired Loans Without Recorded Allowance [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment	22,294	'	18,190
Unpaid Principal Balance	31,595	'	26,223
Impaired Loans With Recorded Allowance [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment	4,393	'	8,199
Unpaid Principal Balance	4,468	'	8,289
Related Allowance	1,793	'	1,690
Impaired Loans Without Recorded Allowance [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment	138	'	144
Unpaid Principal Balance	204	'	210
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] | Residential Construction [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Impaired Loans Without Recorded Allowance [Member] | Land And Acquisition [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment	1,081	'	1,831
Unpaid Principal Balance	1,456	'	2,587
Impaired Loans Without Recorded Allowance [Member] | Owner Occupied [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment	8,679	'	7,206
Unpaid Principal Balance	13,042	'	10,464
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] | Income Property Multifamily [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment	6,459	'	5,495
Unpaid Principal Balance	8,968	'	7,885
Impaired Loans Without Recorded Allowance [Member] | Commercial Land [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment	107	'	115
Unpaid Principal Balance	398	'	398
Impaired Loans Without Recorded Allowance [Member] | One-to-Four Family Residential [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment	1,655	'	1,178
Unpaid Principal Balance	2,812	'	2,119
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] | Secured Loans [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Recorded Investment	4,175	'	2,221
Unpaid Principal Balance	$4,715	'	$2,560

Noncovered_Loans_Noncovered_Lo

Noncovered Loans Noncovered Loans (Analysis of Troubled Debt Restructurings) (Details) (Noncovered Loans [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
	Modifications	Modifications
Financing Receivable, Modifications [Line Items]	'	'
Number of TDR Modifications	5	1
Pre-Modification Outstanding Recorded Investment	$1,183	$117
Post-Modification Outstanding Recorded Investment	1,166	117
Secured Loans [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of TDR Modifications	2	0
Pre-Modification Outstanding Recorded Investment	546	0
Post-Modification Outstanding Recorded Investment	546	0
One-to-Four Family Residential [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of TDR Modifications	2	0
Pre-Modification Outstanding Recorded Investment	494	0
Post-Modification Outstanding Recorded Investment	494	0
Income Property Multifamily [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of TDR Modifications	1	0
Pre-Modification Outstanding Recorded Investment	143	0
Post-Modification Outstanding Recorded Investment	126	0
Land And Acquisition [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of TDR Modifications	0	1
Pre-Modification Outstanding Recorded Investment	0	117
Post-Modification Outstanding Recorded Investment	$0	$117

Allowance_for_Noncovered_Loan_2

Allowance for Noncovered Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Narrative) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Provision for loan and lease losses	$1,922	($20)
Maximum [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Percentage of unallocated loan amount	5.00%	'
Noncovered Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Provision for loan and lease losses	($500)	($1,000)

Allowance_for_Noncovered_Loan_3

Allowance for Noncovered Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Allowance for Noncovered Loan and Lease Losses) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Provision for loan and lease losses	$1,922	($20)
Noncovered Loans [Member]	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Beginning balance	52,280	52,244
Charged-offs	-2,190	-2,517
Recoveries	852	2,392
Provision for loan and lease losses	-500	-1,000
Ending balance	50,442	51,119
Specific Reserve	1,793	385
General Allocation	48,649	50,734
Consumer Portfolio Segment [Member] | Noncovered Loans [Member]	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Beginning balance	2,547	2,437
Charged-offs	-727	-171
Recoveries	253	47
Provision for loan and lease losses	564	51
Ending balance	2,637	2,364
Specific Reserve	3	0
General Allocation	2,634	2,364
Unallocated Financing Receivables [Member] | Noncovered Loans [Member]	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Beginning balance	1,655	1,011
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	-1,587	2,146
Ending balance	68	3,157
Specific Reserve	0	0
General Allocation	68	3,157
Secured Loans [Member] | Noncovered Loans [Member]	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Beginning balance	31,027	27,270
Charged-offs	-198	-988
Recoveries	448	79
Provision for loan and lease losses	-2,476	510
Ending balance	28,801	26,871
Specific Reserve	1,521	67
General Allocation	27,280	26,804
Unsecured Loans [Member] | Noncovered Loans [Member]	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Beginning balance	696	753
Charged-offs	-35	-326
Recoveries	42	34
Provision for loan and lease losses	43	289
Ending balance	746	750
Specific Reserve	27	84
General Allocation	719	666
One-to-Four Family Residential [Member] | Noncovered Loans [Member]	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Beginning balance	1,252	694
Charged-offs	-207	-116
Recoveries	28	0
Provision for loan and lease losses	121	79
Ending balance	1,194	657
Specific Reserve	133	108
General Allocation	1,061	549
Commercial Land [Member] | Noncovered Loans [Member]	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Beginning balance	489	460
Charged-offs	0	0
Recoveries	17	10
Provision for loan and lease losses	73	-37
Ending balance	579	433
Specific Reserve	0	0
General Allocation	579	433
Income Property Multifamily [Member] | Noncovered Loans [Member]	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Beginning balance	9,234	11,033
Charged-offs	0	-783
Recoveries	13	79
Provision for loan and lease losses	860	-918
Ending balance	10,107	9,411
Specific Reserve	0	18
General Allocation	10,107	9,393
Owner Occupied [Member] | Noncovered Loans [Member]	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Beginning balance	3,605	6,362
Charged-offs	-1,023	0
Recoveries	9	4
Provision for loan and lease losses	1,969	-908
Ending balance	4,560	5,458
Specific Reserve	38	34
General Allocation	4,522	5,424
Land And Acquisition [Member] | Noncovered Loans [Member]	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Beginning balance	610	1,171
Charged-offs	0	-32
Recoveries	39	2,139
Provision for loan and lease losses	-69	-2,288
Ending balance	580	990
Specific Reserve	71	74
General Allocation	509	916
Residential Construction [Member] | Noncovered Loans [Member]	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Beginning balance	822	635
Charged-offs	0	-101
Recoveries	3	0
Provision for loan and lease losses	-129	4
Ending balance	696	538
Specific Reserve	0	0
General Allocation	696	538
Income Property Multifamily Construction [Member] | Noncovered Loans [Member]	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Beginning balance	285	316
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	35	66
Ending balance	320	382
Specific Reserve	0	0
General Allocation	320	382
Owner Occupied Construction [Member] | Noncovered Loans [Member]	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Beginning balance	58	102
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	96	6
Ending balance	154	108
Specific Reserve	0	0
General Allocation	$154	$108

Allowance_for_Noncovered_Loan_4

Allowance for Noncovered Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Changes in the Allowance for Unfunded Commitments and Letters of Credit) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Jun. 30, 2012
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit	'	'	'
Beginning balance	$2,505	'	$1,915
Allowance for Loan and Lease Losses, Net Changes In Unfunded Commitments and Letters Of Credit Allowance	-50	0	'
Ending balance	$2,455	$1,915	$1,915

Allowance_for_Noncovered_Loan_5

Allowance for Noncovered Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Analysis of Credit Quality of Noncovered Loan Portfolio) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans, net	$4,506,792	$4,444,842	'	'
Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	4,297,076	4,219,451	'	'
Recorded Investment	4,297,076	4,219,451	'	'
Loans and Leases Receivable, Allowance	50,442	52,280	51,119	52,244
Loans, net	4,246,634	4,167,171	'	'
Pass [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	4,118,418	4,027,764	'	'
Special Mention [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	49,247	53,231	'	'
Substandard [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	129,245	137,989	'	'
Doubtful [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	166	467	'	'
Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Consumer Portfolio Segment [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	325,167	328,334	'	'
Loans and Leases Receivable, Allowance	2,637	2,547	2,364	2,437
Consumer Portfolio Segment [Member] | Pass [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	318,977	321,348	'	'
Consumer Portfolio Segment [Member] | Special Mention [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	331	'	'
Consumer Portfolio Segment [Member] | Substandard [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	6,185	6,188	'	'
Consumer Portfolio Segment [Member] | Doubtful [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	5	467	'	'
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Secured Loans [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	1,524,360	1,483,647	'	'
Loans and Leases Receivable, Allowance	28,801	31,027	26,871	27,270
Secured Loans [Member] | Pass [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	1,422,773	1,372,038	'	'
Secured Loans [Member] | Special Mention [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	42,648	43,309	'	'
Secured Loans [Member] | Substandard [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	58,778	68,300	'	'
Secured Loans [Member] | Doubtful [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	161	0	'	'
Secured Loans [Member] | Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Unsecured Loans [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	72,163	72,604	'	'
Loans and Leases Receivable, Allowance	746	696	750	753
Unsecured Loans [Member] | Pass [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	71,654	72,226	'	'
Unsecured Loans [Member] | Special Mention [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	199	199	'	'
Unsecured Loans [Member] | Substandard [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	310	179	'	'
Unsecured Loans [Member] | Doubtful [Member] | Noncovered 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] | Noncovered 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] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	102,854	105,892	'	'
Loans and Leases Receivable, Allowance	1,194	1,252	657	694
One-to-Four Family Residential [Member] | Pass [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	97,004	98,626	'	'
One-to-Four Family Residential [Member] | Special Mention [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	1,448	1,567	'	'
One-to-Four Family Residential [Member] | Substandard [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	4,402	5,699	'	'
One-to-Four Family Residential [Member] | Doubtful [Member] | Noncovered 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] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Commercial Land [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	145,295	142,834	'	'
Loans and Leases Receivable, Allowance	579	489	433	460
Commercial Land [Member] | Pass [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	139,910	137,850	'	'
Commercial Land [Member] | Special Mention [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Commercial Land [Member] | Substandard [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	5,385	4,984	'	'
Commercial Land [Member] | Doubtful [Member] | Noncovered 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] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Income Property Multifamily [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	1,186,982	1,146,432	'	'
Loans and Leases Receivable, Allowance	10,107	9,234	9,411	11,033
Income Property Multifamily [Member] | Pass [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	1,150,595	1,108,033	'	'
Income Property Multifamily [Member] | Special Mention [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	974	5,473	'	'
Income Property Multifamily [Member] | Substandard [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	35,413	32,926	'	'
Income Property Multifamily [Member] | Doubtful [Member] | Noncovered 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] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Owner Occupied [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	753,256	760,609	'	'
Loans and Leases Receivable, Allowance	4,560	3,605	5,458	6,362
Owner Occupied [Member] | Pass [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	739,956	748,725	'	'
Owner Occupied [Member] | Special Mention [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	1,443	0	'	'
Owner Occupied [Member] | Substandard [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	11,857	11,884	'	'
Owner Occupied [Member] | Doubtful [Member] | Noncovered 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] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Land And Acquisition [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	13,580	11,670	'	'
Loans and Leases Receivable, Allowance	580	610	990	1,171
Land And Acquisition [Member] | Pass [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	9,928	7,526	'	'
Land And Acquisition [Member] | Special Mention [Member] | Noncovered 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] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	3,652	4,144	'	'
Land And Acquisition [Member] | Doubtful [Member] | Noncovered 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] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Residential Construction [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	43,333	41,992	'	'
Loans and Leases Receivable, Allowance	696	822	538	635
Residential Construction [Member] | Pass [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	38,413	36,270	'	'
Residential Construction [Member] | Special Mention [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	2,120	2,352	'	'
Residential Construction [Member] | Substandard [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	2,800	3,370	'	'
Residential Construction [Member] | Doubtful [Member] | Noncovered 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] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Income Property Multifamily Construction [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	90,698	86,521	'	'
Loans and Leases Receivable, Allowance	320	285	382	316
Income Property Multifamily Construction [Member] | Pass [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	90,235	86,206	'	'
Income Property Multifamily Construction [Member] | Special Mention [Member] | Noncovered 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] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	463	315	'	'
Income Property Multifamily Construction [Member] | Doubtful [Member] | Noncovered 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] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Owner Occupied Construction [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	39,388	38,916	'	'
Loans and Leases Receivable, Allowance	154	58	108	102
Owner Occupied Construction [Member] | Pass [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	38,973	38,916	'	'
Owner Occupied Construction [Member] | Special Mention [Member] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	415	0	'	'
Owner Occupied Construction [Member] | Substandard [Member] | Noncovered 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] | Noncovered 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] | Noncovered Loans [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	$0	$0	'	'

Changes_in_Noncovered_Other_Re2

Changes in Noncovered Other Real Estate Owned (Summary of Noncovered Other Real Estate Owned) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Other Real Estate Owned [Line Items]	'	'
Balance, beginning of period	$35,927	'
Proceeds from sale of OREO property	-8,102	-2,019
Gain (loss) on sale of OREO	1,659	2,787
Total OREO, end of period	30,552	'
Noncovered Loans [Member]	'	'
Other Real Estate Owned [Line Items]	'	'
Balance, beginning of period	23,834	10,676
Transfers in, net of write-downs ($0 and $32, respectively)	244	2,709
Transfers in, write-downs	0	32
Additional OREO write-down	-929	-93
Proceeds from sale of OREO property	-8,102	-1,565
Gain (loss) on sale of OREO	793	189
Total OREO, end of period	$15,840	$11,916

Covered_Assets_and_FDIC_Losssh2

Covered Assets and FDIC Loss-sharing Asset (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'
Amount of Estimated Clawback Liability	$4,100,000	'
Payment Of Clawback If Losses Less Than Stated Levels, Period After Acquisition	'10 years 45 days	'
Provision for loan and lease losses	1,922,000	-20,000
Federal deposit insurance corporation loss-sharing indemnified assets	30,500,000	'
Federal deposit insurance corporation loss-sharing indemnified assets receivable	6,300,000	'
FDIC Loss-sharing Asset, Period Increase (Decrease)	1,900,000	'
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%	'
Provision for loan and lease losses	2,422,000	980,000
Impairment expenses	2,600,000	'
Negative provision to adjust allowance for loss	$200,000	'
Covered Loans [Member] | 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	'
Covered Loans [Member] | 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_Assets_and_FDIC_Losssh3

Covered Assets and FDIC Loss-sharing Asset (Analysis of Covered Loans) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'	'	'
Loans, net	$4,506,792	$4,444,842	'	'
Covered Loans [Member]	'	'	'	'
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	317,836	341,142	'	'
Valuation discount on covered loans	37,549	43,297	'	'
Allowance for loan losses	20,129	20,174	29,489	30,056
Loans, net	260,158	277,671	'	'
Commercial Portfolio Segment [Member] | Covered Loans [Member]	'	'	'	'
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	64,945	72,870	'	'
Real Estate Portfolio Segment [Member] | Covered Loans [Member]	'	'	'	'
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	203,032	212,521	'	'
One-to-Four Family Residential Construction [Domain] | Covered Loans [Member]	'	'	'	'
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	10,969	14,781	'	'
Commercial and Multifamily Residential Construction [Domain] | Covered Loans [Member]	'	'	'	'
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	6,349	6,869	'	'
Real Estate Construction Portfolio Segment [Member] | Covered Loans [Member]	'	'	'	'
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	17,318	21,650	'	'
Consumer Portfolio Segment [Member] | Covered Loans [Member]	'	'	'	'
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	32,541	34,101	'	'
One-to-Four Family Residential [Member] | Covered Loans [Member]	'	'	'	'
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	39,056	41,642	'	'
Commercial and Multifamily Residential [Member] | Covered Loans [Member]	'	'	'	'
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	$163,976	$170,879	'	'

Covered_Assets_and_FDIC_Losssh4

Covered Assets and FDIC Loss-sharing Asset (Changes in Accretable Yield for Acquired Loans) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Covered Assets And FDIC Loss Sharing Asset	'	'
Balance at beginning of period	$103,907	$166,888
Accretion	-10,569	-14,477
Disposals	-2,826	-774
Reclassifications (to) from nonaccretable difference	11,031	7,149
Balance at end of period	$101,543	$158,786

Covered_Assets_and_FDIC_Losssh5

Covered Assets and FDIC Loss-sharing Asset (Changes in Allowance for Covered Loans) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'
Provision for loan and lease losses	$1,922	($20)
Covered Loans [Member]	'	'
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'
Beginning balance	20,174	30,056
Loans charged off	-4,273	-2,382
Recoveries	1,806	835
Provision for loan and lease losses	2,422	980
Ending balance	$20,129	$29,489

Covered_Assets_and_FDIC_Losssh6

Covered Assets and FDIC Loss-sharing Asset (Covered OREO at Carrying Value) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'
Balance, beginning of period	$35,927	'
Proceeds from sale of OREO property	-8,102	-2,019
Gain on sale of OREO	1,659	2,787
Total OREO, end of period	30,552	'
Covered Loans [Member]	'	'
Covered Assets And FDIC Loss Sharing Asset [Line Items]	'	'
Balance, beginning of period	12,093	16,311
Transfers in	5,507	1,405
Additional OREO write-down	-651	-65
Proceeds from sale of OREO property	-3,103	-6,438
Gain on sale of OREO	866	2,598
Total OREO, end of period	$14,712	$13,811

Covered_Assets_and_FDIC_Losssh7

Covered Assets and FDIC Loss-sharing Asset (FDIC Loss-sharing Asset) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Covered Assets And FDIC Loss Sharing Asset	'	'
Balance at beginning of period	$39,846	$96,354
Cash received from the FDIC	1,678	-3,119
FDIC reimbursable losses, net	132	363
Amortization, net	-6,452	-9,779
Impairment	1,938	784
Sale of other real estate	-756	-1,346
Write-downs of other real estate	516	52
Other	-65	-194
Balance at end of period	$36,837	$83,115

Covered_Assets_and_FDIC_Losssh8

Covered Assets and FDIC Loss-sharing Asset Covered Loans - Credit Quality Indicator (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Net Reported Amount	$4,506,792	$4,444,842	'	'
Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	317,836	341,142	'	'
Valuation discount on covered loans	37,549	43,297	'	'
Loans and Leases Receivable, Allowance	20,129	20,174	29,489	30,056
Loans and Leases Receivable, Net Reported Amount	260,158	277,671	'	'
Covered Loans [Member] | Pass [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	256,260	264,008	'	'
Covered Loans [Member] | Special Mention [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	8,259	12,118	'	'
Covered Loans [Member] | Substandard [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	53,290	64,989	'	'
Covered Loans [Member] | Doubtful [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	27	27	'	'
Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Commercial Portfolio Segment [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	64,945	72,870	'	'
Real Estate Portfolio Segment [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	203,032	212,521	'	'
Real Estate Construction Portfolio Segment [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	17,318	21,650	'	'
Consumer Portfolio Segment [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	32,541	34,101	'	'
Consumer Portfolio Segment [Member] | Covered Loans [Member] | Pass [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	29,657	30,722	'	'
Consumer Portfolio Segment [Member] | Covered Loans [Member] | Special Mention [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	33	'	'
Consumer Portfolio Segment [Member] | Covered Loans [Member] | Substandard [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	2,857	3,319	'	'
Consumer Portfolio Segment [Member] | Covered Loans [Member] | Doubtful [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	27	27	'	'
Consumer Portfolio Segment [Member] | Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Secured Loans [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	61,741	69,650	'	'
Secured Loans [Member] | Covered Loans [Member] | Pass [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	44,916	48,510	'	'
Secured Loans [Member] | Covered Loans [Member] | Special Mention [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	1,276	2,849	'	'
Secured Loans [Member] | Covered Loans [Member] | Substandard [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	15,549	18,291	'	'
Secured Loans [Member] | Covered Loans [Member] | Doubtful [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Secured Loans [Member] | Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Unsecured Loans [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	3,204	3,220	'	'
Unsecured Loans [Member] | Covered Loans [Member] | Pass [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	2,728	2,732	'	'
Unsecured Loans [Member] | Covered Loans [Member] | Special Mention [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	396	396	'	'
Unsecured Loans [Member] | Covered Loans [Member] | Substandard [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	80	92	'	'
Unsecured Loans [Member] | Covered Loans [Member] | Doubtful [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Unsecured Loans [Member] | Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
One-to-Four Family Residential [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	39,056	41,642	'	'
One-to-Four Family Residential [Member] | Covered Loans [Member] | Pass [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	32,729	35,066	'	'
One-to-Four Family Residential [Member] | Covered Loans [Member] | Special Mention [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	1,828	1,842	'	'
One-to-Four Family Residential [Member] | Covered Loans [Member] | Substandard [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	4,499	4,734	'	'
One-to-Four Family Residential [Member] | Covered Loans [Member] | Doubtful [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
One-to-Four Family Residential [Member] | Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Commercial Land [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	18,227	18,565	'	'
Commercial Land [Member] | Covered Loans [Member] | Pass [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	10,487	10,778	'	'
Commercial Land [Member] | Covered Loans [Member] | Special Mention [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	198	'	'
Commercial Land [Member] | Covered Loans [Member] | Substandard [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	7,740	7,589	'	'
Commercial Land [Member] | Covered Loans [Member] | Doubtful [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Commercial Land [Member] | Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Income Property Multifamily [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	70,021	70,592	'	'
Income Property Multifamily [Member] | Covered Loans [Member] | Pass [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	58,519	55,985	'	'
Income Property Multifamily [Member] | Covered Loans [Member] | Special Mention [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	3,945	3,950	'	'
Income Property Multifamily [Member] | Covered Loans [Member] | Substandard [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	7,557	10,657	'	'
Income Property Multifamily [Member] | Covered Loans [Member] | Doubtful [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Income Property Multifamily [Member] | Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Owner Occupied [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	75,728	81,722	'	'
Owner Occupied [Member] | Covered Loans [Member] | Pass [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	65,389	67,653	'	'
Owner Occupied [Member] | Covered Loans [Member] | Special Mention [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	814	111	'	'
Owner Occupied [Member] | Covered Loans [Member] | Substandard [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	9,525	13,958	'	'
Owner Occupied [Member] | Covered Loans [Member] | Doubtful [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Owner Occupied [Member] | Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Land And Acquisition [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	5,615	9,349	'	'
Land And Acquisition [Member] | Covered Loans [Member] | Pass [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	4,036	4,674	'	'
Land And Acquisition [Member] | Covered Loans [Member] | Special Mention [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	2,739	'	'
Land And Acquisition [Member] | Covered Loans [Member] | Substandard [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	1,579	1,936	'	'
Land And Acquisition [Member] | Covered Loans [Member] | Doubtful [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Land And Acquisition [Member] | Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Residential Construction [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	5,354	5,432	'	'
Residential Construction [Member] | Covered Loans [Member] | Pass [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	2,973	3,008	'	'
Residential Construction [Member] | Covered Loans [Member] | Special Mention [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Residential Construction [Member] | Covered Loans [Member] | Substandard [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	2,381	2,424	'	'
Residential Construction [Member] | Covered Loans [Member] | Doubtful [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Residential Construction [Member] | Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Income Property Multifamily Construction [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	5,284	5,515	'	'
Income Property Multifamily Construction [Member] | Covered Loans [Member] | Pass [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	3,761	3,806	'	'
Income Property Multifamily Construction [Member] | Covered Loans [Member] | Special Mention [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Income Property Multifamily Construction [Member] | Covered Loans [Member] | Substandard [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	1,523	1,709	'	'
Income Property Multifamily Construction [Member] | Covered Loans [Member] | Doubtful [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Income Property Multifamily Construction [Member] | Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Owner Occupied Construction [Member] | Covered Loans [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	1,065	1,354	'	'
Owner Occupied Construction [Member] | Covered Loans [Member] | Pass [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	1,065	1,074	'	'
Owner Occupied Construction [Member] | Covered Loans [Member] | Special Mention [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Owner Occupied Construction [Member] | Covered Loans [Member] | Substandard [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	280	'	'
Owner Occupied Construction [Member] | Covered Loans [Member] | Doubtful [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	0	0	'	'
Owner Occupied Construction [Member] | Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]	'	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount	$0	$0	'	'

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets (Schedule of Goodwill and Intangible Assets) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Goodwill and Intangible Assets [Line Items]	'	'	'	'
Indefinite-Lived Intangible Assets (Excluding Goodwill)	$919	$0	'	'
Intangible Assets, Net (Excluding Goodwill)	24,273	14,693	25,852	'
Goodwill and Intangible Assets [Roll Forward]	'	'	'	'
Total goodwill, beginning of period	343,952	'	'	'
Total goodwill, end of period	343,952	115,554	'	'
CDI current period amortization	-1,580	-1,029	'	'
Total goodwill and intangible assets, end of period	368,225	130,247	'	'
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	'	'	47,698	32,441
Accumulated amortization at beginning of period	'	'	-22,765	-16,720
Core deposit intangible, net, beginning of period	24,933	15,721	'	'
CDI current period amortization	-1,579	-1,028	'	'
Total core deposit intangible, end of period	$23,354	$14,693	'	'

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets (Estimated Future Amortization Expense of Core Deposit Intangibles) (Details) (USD $)	Mar. 31, 2014
In Thousands, unless otherwise specified
Future Amortization Expense For Core Deposit Intangibles	'
2014	$4,383
2015	4,934
2016	4,195
2017	3,361
2018	$2,500

Shareholders_Equity_Details

Shareholders' Equity (Details) (USD $)	0 Months Ended		3 Months Ended		0 Months Ended
In Millions, except Share data, unless otherwise specified	Apr. 23, 2014	Jan. 23, 2014	Mar. 31, 2014	Apr. 02, 2013	Apr. 23, 2014	Apr. 02, 2013
					Dividend Declared [Member]	Series B Preferred Stock [Member]
Subsequent Event [Line Items]	'	'	'	'	'	'
Stock Issued During Period, Shares, New Issues	'	'	'	'	'	8,782
Preferred Stock Converted Into Common Stock, Shares	'	'	102,363	'	'	'
Declared quarterly cash dividend	'	$0.12	'	'	$0.12	'
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	'	'	582,799	'	'	'
Class of Warrant or Right, Exercise Price of Warrants or Rights	'	'	'	8.58	'	'
Warrants and Rights Outstanding	'	'	$5	'	'	'
Warrant activity, gross shares	'	'	1,631,840	'	'	'
Warrant Activity, Net Shares	'	'	1,139,698	'	'	'
Special Dividends Payable, Amount Per Share	$0.12	'	'	'	'	'

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Changes in AOCI by Component) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'		'
Beginning balance	($12,044)	[1]	$20,149	[1]
Other comprehensive income before reclassifications	7,119	[1]	-3,250	[1]
Amounts reclassified from accumulated other comprehensive loss (2)	-118	[1],[2]	-180	[1],[2]
Net current-period other comprehensive income	7,001	[1]	-3,430	[1]
Ending balance	-5,043	[1]	16,719	[1]
Unrealized Gains and Losses on Available-for-Sale Securities [Member]	'		'
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'		'
Beginning balance	-10,108	[1]	20,918	[1]
Other comprehensive income before reclassifications	7,119	[1]	-2,493	[1]
Amounts reclassified from accumulated other comprehensive loss (2)	-142	[1],[2]	-240	[1],[2]
Net current-period other comprehensive income	6,977	[1]	-2,733	[1]
Ending balance	-3,131	[1]	18,185	[1]
Unrealized Gains and Losses on Pension Plan Liability [Member]	'		'
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'		'
Beginning balance	-1,936	[1]	-769	[1]
Other comprehensive income before reclassifications	0	[1]	-757	[1]
Amounts reclassified from accumulated other comprehensive loss (2)	24	[1],[2]	60	[1],[2]
Net current-period other comprehensive income	24	[1]	-697	[1]
Ending balance	($1,912)	[1]	($1,466)	[1]
[1]	All amounts are net of tax. Amounts in parenthesis indicate debits.
[2]	See following table for details about these reclassifications.

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income (Reclassification out of AOCI) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'
Investment securities gains, net	$223	$370
Compensation and employee benefits	31,338	21,653
Total before tax	28,640	17,111
Income tax provision	-8,796	-4,935
Net Income	19,844	12,176
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	223	370
Total before tax	223	370
Income tax provision	-81	-130
Net Income	142	240
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	-37	-92
Total before tax	-37	-92
Income tax provision	13	32
Net Income	($24)	($60)

Derivatives_and_Balance_Sheet_2

Derivatives and Balance Sheet Offsetting (Details) (Not Designated as Hedging Instrument [Member], Interest Rate Contracts [Member], USD $)	Mar. 31, 2014	Dec. 31, 2013
Derivative [Line Items]	'	'
Derivative, Notional Amount	$186,900,000	$179,500,000
Other Assets [Member]	'	'
Derivative [Line Items]	'	'
Fair value of asset derivative instruments	9,418,000	9,044,000
Other Liabilities [Member]	'	'
Derivative [Line Items]	'	'
Fair value of liability derivative instruments	$9,418,000	$9,044,000

Derivatives_and_Balance_Sheet_3

Derivatives and Balance Sheet Offsetting Balance Sheet Offsetting (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Balance Sheet Offsetting [Line Items]	'	'
Repurchase agreements, amounts offset in balance sheet	$0	$0
Repurchase agreements, net amount presented in statement of financial position	25,000	25,000
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	-25,000	-25,000
Securities sold under agreements to repurchase, amount not offset	0	0
Interest Rate Contracts [Member]	'	'
Balance Sheet Offsetting [Line Items]	'	'
Derivative Assets, Gross Amounts Offset in the Balance Sheets	0	0
Derivative Asset	9,418	9,044
Derivative, Collateral, Obligation to Return Securities	0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	9,418	9,044
Derivative Liability, Gross Amounts Offset in Balance Sheets	0	0
Derivative Liability	9,418	9,044
Derivative, Collateral, Right to Reclaim Securities	-9,418	-9,044
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0	0
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member] | Other Assets [Member]	'	'
Balance Sheet Offsetting [Line Items]	'	'
Fair value of asset derivative instruments	9,418	9,044
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member] | Other Liabilities [Member]	'	'
Balance Sheet Offsetting [Line Items]	'	'
Fair value of liability derivative instruments	9,418	9,044
Available-for-sale Securities [Member]	'	'
Balance Sheet Offsetting [Line Items]	'	'
Securities Sold under Agreements to Repurchase, Gross	$25,000	$25,000

Fair_Value_Accounting_and_Meas2

Fair Value Accounting and Measurement (Financial Assets And Liabilities Accounted for Fair Value On Recurring Basis) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	$1,639,370	$1,664,111
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	1,639,370	1,664,111
Other assets (Interest rate contracts)	9,418	9,044
Other liabilities (Interest rate contracts)	9,418	9,044
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	20,303	20,114
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	1,619,067	1,643,997
Other assets (Interest rate contracts)	9,418	9,044
Other liabilities (Interest rate contracts)	9,418	9,044
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	912,298	948,408
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	912,298	948,408
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	373,680	364,470
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	373,680	364,470
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	327,986	326,039
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	327,986	326,039
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	20,303	20,114
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	20,303	20,114
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	5,103	5,080
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	5,103	5,080
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_Meas3

Fair Value Accounting and Measurement (Financial Assets Accounted For Fair Value On Nonrecurring Basis) (Details) (Fair Value, Measurements, Nonrecurring [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Impaired loans	$2,094	$477
Fair Value, Option, Changes in Fair Value, Gain (Loss)	-2,690	-268
Assets, Fair Value Disclosure	8,219	1,892
Fair Value, Inputs, Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Impaired loans	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	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	2,094	477
Assets, Fair Value Disclosure	8,219	1,892
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)	-1,387	-102
Covered Loans [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
OREO	4,376	65
Covered Loans [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
OREO	0	0
Covered Loans [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
OREO	0	0
Covered Loans [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
OREO	4,376	65
Covered Loans [Member] | 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)	-616	-65
Noncovered Loans [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
OREO	1,749	1,350
Noncovered Loans [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
OREO	0	0
Noncovered Loans [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
OREO	0	0
Noncovered Loans [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
OREO	1,749	1,350
Noncovered Loans [Member] | 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)	($687)	($101)

Fair_Value_Accounting_and_Meas4

Fair Value Accounting and Measurement (Quantitative Information About Level 3 Fair Value Measurements) (Details) (Fair Value, Measurements, Nonrecurring [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Impaired loans	2,094		477
Fair Value, Inputs, Level 3 [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Impaired loans	2,094		477
Noncovered Loans [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
OREO	1,749		1,350
Noncovered Loans [Member] | Fair Value, Inputs, Level 3 [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
OREO	1,749		1,350
Covered Loans [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
OREO	4,376		65
Covered Loans [Member] | Fair Value, Inputs, Level 3 [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
OREO	4,376		65
Real Estate Collateral [Member] | Fair Value, Inputs, Level 3 [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Impaired loans	990		477
Other Collateral [Member] | Fair Value, Inputs, Level 3 [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Impaired loans	1,104		'
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	0.00%	[1],[2]	0.00%	[1]
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	100.00%	[1],[2]	0.00%	[1]
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	68.00%	[1],[2]	0.00%	[1],[2]
[1]	(1) Discount applied to appraisal value, letter of intent to purchase, or stated value (in the case of accounts receivable and inventory).
[2]	(3) Other collateral consists of accounts receivable and inventory.

Fair_Value_Accounting_and_Meas5

Fair Value Accounting and Measurement (Carrying Amounts and Estimated Fair Values of Selected Financial Instruments) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets	'	'
Interest-earning deposits with banks	$45,083	$14,531
Securities available for sale	1,639,370	1,664,111
Carrying (Reported) Amount, Fair Value Disclosure [Member]	'	'
Assets	'	'
Cash and due from banks	191,706	165,030
Interest-earning deposits with banks	45,083	14,531
Securities available for sale	1,639,370	1,664,111
FHLB stock	32,224	32,529
Loans held for sale	'	735
Loans	4,506,792	4,444,842
FDIC loss-sharing asset	36,837	39,846
Interest rate contracts	9,418	9,044
Liabilities	'	'
Deposits	6,044,416	5,959,475
FHLB Advances	6,597	36,606
Repurchase agreements	25,000	25,000
Interest rate contracts	9,418	9,044
Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Assets	'	'
Cash and due from banks	191,706	165,030
Interest-earning deposits with banks	45,083	14,531
Securities available for sale	1,639,370	1,664,111
FHLB stock	32,224	32,529
Loans held for sale	'	735
Loans	4,654,744	4,605,038
FDIC loss-sharing asset	13,512	11,248
Interest rate contracts	9,418	9,044
Liabilities	'	'
Deposits	6,043,226	5,958,747
FHLB Advances	5,452	35,080
Repurchase agreements	26,303	26,361
Interest rate contracts	9,418	9,044
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Assets	'	'
Cash and due from banks	191,706	165,030
Interest-earning deposits with banks	45,083	14,531
Securities available for sale	20,303	20,114
FHLB stock	0	0
Loans held for sale	'	0
Loans	0	0
FDIC loss-sharing asset	0	0
Interest rate contracts	0	0
Liabilities	'	'
Deposits	5,554,663	5,449,546
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	1,619,067	1,643,997
FHLB stock	32,224	32,529
Loans held for sale	'	735
Loans	0	0
FDIC loss-sharing asset	0	0
Interest rate contracts	9,418	9,044
Liabilities	'	'
Deposits	488,563	509,201
FHLB Advances	5,452	35,080
Repurchase agreements	26,303	26,361
Interest rate contracts	9,418	9,044
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
Loans	4,654,744	4,605,038
FDIC loss-sharing asset	13,512	11,248
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 $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]	'	'
Net Income	$19,844	$12,176
Earnings allocated to participating securities - nonvested restricted shares	169	123
Earnings allocated to participating securities - preferred shares	40	0
Earnings allocated to common shareholders, Basic	19,635	12,053
Weighted average common shares outstanding	51,097	39,348
Basic earnings per common share	$0.38	$0.31
Dilutive effect of equity awards and warrants	1,336	3
Earnings allocated to common shareholders, Diluted	$19,639	$12,053
Weighted average diluted common shares outstanding	52,433	39,351
Diluted earnings per common share	$0.37	$0.31
Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive.	83	9