Hope Bancorp (HOPE) 10-Q 11 May 15 2015 Q1 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	3 Months Ended
	Mar. 31, 2015	4-May-15
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Entity Registrant Name	BBCN BANCORP INC
Entity Central Index Key	1128361
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		79,549,770

Condensed_Consolidated_Stateme

Condensed Consolidated Statements Of Financial Condition (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Cash and cash equivalents:
Cash and due from banks	$94,034	$86,119
Interest bearing deposit at the Federal Reserve Bank (FRB)	335,837	376,041
Total cash and cash equivalents	429,871	462,160
Securities available for sale, at fair value	812,372	796,523
Loans held for sale, at the lower of cost or fair value	26,432	28,311
Loans receivable (net of allowance for loan losses of $69,594 and $67,758 at March 31, 2015 and December 31, 2014, respectively)	5,641,045	5,497,434
Other real estate owned (OREO), net	19,606	21,938
Federal Home Loan Bank (FHLB) stock, at cost	28,289	28,324
Premises and equipment (net of accumulated depreciation and amortization of $31,630 and $29,915 at March 31, 2015 and December 31, 2014, respectively)	30,074	30,722
Accrued interest receivable	13,904	13,634
Deferred tax assets, net	55,685	63,023
Customers’ liabilities on acceptances	1,029	1,889
Bank owned life insurance (BOLI)	46,196	45,927
Investments in affordable housing partnerships	11,000	10,401
Goodwill	105,401	105,401
Core deposit intangible assets, net	3,620	3,887
Servicing assets	10,529	10,341
Other assets	32,852	20,415
Total assets	7,267,905	7,140,330
LIABILITIES:
Noninterest bearing	1,616,935	1,543,018
Interest bearing:
Money market and NOW accounts	1,592,151	1,663,855
Savings deposits	193,839	198,205
Time deposits of $100,000 or more	1,774,109	1,667,367
Other time deposits	626,220	621,007
Total deposits	5,803,254	5,693,452
FHLB advances	480,881	480,975
Subordinated debentures	42,199	42,158
Accrued interest payable	6,477	5,855
Acceptances outstanding	1,029	1,889
Other liabilities	34,867	33,228
Total liabilities	6,368,707	6,257,557
STOCKHOLDERS’ EQUITY:
Common stock, $0.001 par value; authorized 150,000,000 shares at March 31, 2015 and December 31, 2014; issued and outstanding, 79,542,321 and 79,503,552 shares at March 31, 2015 and December 31, 2014, respectively	79	79
Additional paid-in capital	541,824	541,589
Retained earnings	352,807	339,400
Accumulated other comprehensive income, net	4,488	1,705
Total stockholders’ equity	899,198	882,773
Total liabilities and stockholders’ equity	$7,267,905	$7,140,330

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements Of Financial Condition (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Loans receivable, allowance	$68,232	$67,320
Premises and equipment, accumulated depreciation and amortization	$28,505	$25,852
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	79,497,331	79,441,525
Common stock, shares outstanding	79,497,331	79,441,525

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements Of Income (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
INTEREST INCOME:
Interest and fees on loans	$69,639	$68,694
Interest on securities	4,219	4,095
Interest on federal funds sold and other investments	696	565
Total interest income	74,554	73,354
INTEREST EXPENSE:
Interest on deposits	7,754	6,690
Interest on FHLB advances	1,297	1,211
Interest on other borrowings	380	487
Total interest expense	9,431	8,388
NET INTEREST INCOME BEFORE PROVISION FOR LOAN LOSSES	65,123	64,966
PROVISION FOR LOAN LOSSES	1,500	3,026
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	63,623	61,940
NONINTEREST INCOME:
Service fees on deposit accounts	3,062	3,472
International service fees	814	1,004
Loan servicing fees, net	720	965
Wire transfer fees	763	905
Other income and fees	2,086	1,621
Net gains on sales of SBA loans	3,044	2,722
Net gains on sales of other loans	182	0
Net gains on sales of securities available for sale	424	0
Net gains losses on sales of OREO	110	406
Total noninterest income	11,205	11,095
NONINTEREST EXPENSE:
Salaries and employee benefits	21,181	18,938
Occupancy	4,692	4,623
Furniture and equipment	2,263	2,014
Advertising and marketing	1,391	1,088
Data processing and communication	2,349	2,122
Professional fees	1,424	1,313
FDIC assessments	1,112	1,023
Credit related expenses	2,189	1,421
Merger and integration expense	52	173
Other	2,581	3,560
Total noninterest expense	39,234	36,275
INCOME BEFORE INCOME TAX PROVISION	35,594	36,760
INCOME TAX PROVISION	14,236	14,564
NET INCOME	$21,358	$22,196
EARNINGS PER COMMON SHARE
Basic (in dollars per share)	$0.27	$0.28
Diluted (in dollars per share)	$0.27	$0.28

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements Of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$21,358	$22,196
Other comprehensive income:
Unrealized gains on securities available for sale and interest only strips	5,255	11,140
Reclassification adjustments for gains realized in income	-424	0
Tax expense	2,048	4,696
Change in unrealized gains on securities available for sale and interest only strips	2,783	6,444
Total comprehensive income	$24,141	$28,640

Condensed_Consolidated_Stateme4

Condensed Consolidated Statements Of Changes In Stockholders' Equity (USD $)	Total	Common Stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss), net
In Thousands, except Share data, unless otherwise specified
Balance at Dec. 31, 2013		$79	$540,876	$278,604	($10,185)
Balance, shares at Dec. 31, 2013		79,441,525
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of additional shares pursuant to various stock plans, shares		47,374
Issuance of additional shares pursuant to various stock plans			-1
Stock-based compensation			104
Cash dividends declared on common stock				-5,958
Comprehensive income:
Net income	22,196			22,196
Other comprehensive income (loss)					6,444
Balance at Mar. 31, 2014		79	540,979	294,842	-3,741
Balance, shares at Mar. 31, 2014		79,488,899
Balance at Dec. 31, 2014	882,773	79	541,589	339,400	1,705
Balance, shares at Dec. 31, 2014		79,503,552
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of additional shares pursuant to various stock plans, shares		38,769
Issuance of additional shares pursuant to various stock plans			0
Stock-based compensation			235
Cash dividends declared on common stock				-7,951
Comprehensive income:
Net income	21,358			21,358
Other comprehensive income (loss)					2,783
Balance at Mar. 31, 2015	$899,198	$79	$541,824	$352,807	$4,488
Balance, shares at Mar. 31, 2015		79,542,321

Condensed_Consolidated_Stateme5

Condensed Consolidated Statements Of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Proceeds from sales and disposals of equipment	$6	$0
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	21,358	22,196
Adjustments to reconcile net income to net cash from operating activities:
Depreciation, amortization, net of discount accretion	-715	-4,564
Stock-based compensation expense	235	104
Provision for loan losses	1,500	3,026
Valuation adjustment of OREO	378	314
Proceeds from sales of loans held for sale	36,066	31,878
Originations of loans held for sale	-31,837	-28,414
Net gains on sales of SBA and other loans	-3,226	-2,722
Net change in BOLI	-269	-292
Net gains on sales of securities available for sale	-424	0
Net gains on sales of OREO	-110	-406
Change in accrued interest receivable	-270	-7
Change in deferred income taxes	5,290	6,284
Change in investments in affordable housing partnership	-599	507
Change in FDIC loss share receivable	0	857
Servicing Asset at Amortized Cost, Additions	-1,045	-815
Change in other assets	-12,428	7,972
Change in accrued interest payable	622	919
Change in other liabilities	1,715	-1,261
Net cash provided by operating activities	16,248	35,576
Gain (Loss) on Disposition of Assets	7	0
CASH FLOWS FROM INVESTING ACTIVITIES
Net change in loans receivable	-141,318	-109,295
Proceeds from sales of securities available for sale	22,510	0
Proceeds from sales of OREO	2,400	4,820
Purchase of premises and equipment	-1,101	-1,969
Purchase of securities available for sale	-65,632	-37,444
Redemption of FHLB stock	35	39
Proceeds from matured or paid-down securities available for sale	31,461	28,235
Net cash used in investing activities	-150,313	-115,614
CASH FLOWS FROM FINANCING ACTIVITIES
Net change in deposits	109,727	187,866
Redemption of subordinated debentures	0	-15,464
Cash dividends paid on Common Stock	-7,951	-5,958
Net cash provided by financing activities	101,776	166,444
NET CHANGE IN CASH AND CASH EQUIVALENTS	-32,289	86,406
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	462,160	316,705
CASH AND CASH EQUIVALENTS, END OF PERIOD	429,871	403,111
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Interest paid	8,809	7,469
Income taxes paid	15,852	2,610
SUPPLEMENTAL DISCLOSURES OF NON-CASH ACTIVITIES
Transfer from loans receivable to OREO	412	187
Transfer from loans receivable to loans held for sale	450	34
Loans to facilitate sales of loans held for sale	0	5,250
Proceeds from Sale of Other Loans Held-for-sale	$1,326	$0

BBCN_Bancorp_Inc

BBCN Bancorp, Inc.	3 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BBCN Bancorp, Inc.	BBCN Bancorp, Inc.
	BBCN Bancorp, Inc. ("BBCN Bancorp" on a parent-only basis and the "Company" on a consolidated basis), headquartered in Los Angeles, California, is the holding company for BBCN Bank ("BBCN Bank" or the "Bank"). The Bank has branches in California, New Jersey, and the New York City, Chicago, Seattle and Washington, D.C. metropolitan areas, as well as loan production offices in Atlanta, Dallas, Denver, Northern California, Seattle and Annandale. The Company is a corporation organized under the laws of the state of Delaware and a bank holding company registered under the Bank Holding Company Act of 1956, as amended.

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2015
Basis Of Presentation [Abstract]
Basis of Presentation	Basis of Presentation
	The condensed consolidated financial statements included herein have been prepared without an audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”), except for the Condensed Consolidated Statement of Financial Condition as of December 31, 2014 which was derived from audited financial statements included in the Company's 2014 Annual Report on Form 10-K. Certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to such SEC rules and regulations.
	The condensed consolidated financial statements include the accounts of BBCN Bancorp and its wholly-owned subsidiaries, principally BBCN Bank. All intercompany transactions and balances have been eliminated in consolidation. The Company has made all adjustments, consisting solely of normal recurring accruals, that in the opinion of management, are necessary to fairly present the Company's financial position at March 31, 2015 and the results of operations for the three months then ended. Certain reclassifications have been made to prior period amounts to conform to the current year presentation. The results of operations for the interim periods are not necessarily indicative of results to be anticipated for the full year.
	The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are susceptible to change in the near term relate to the determination of the allowance and provision for loan losses, the evaluation of other than temporary impairment of investment securities, accounting for derivatives and hedging activities, the determination of the carrying value for cash surrender value of life insurance, the determination of the carrying value of goodwill and other intangible assets, accounting for deferred tax assets and related valuation allowances, the determination of the fair values of investment securities and other financial instruments, accounting for lease arrangements, accounting for incentive compensation, profit sharing and bonus payments, and the valuation of servicing assets.
	These unaudited condensed consolidated financial statements should be read along with the audited consolidated financial statements and accompanying notes included in the Company's 2014 Annual Report on Form 10-K.
	Recent Accounting Pronouncements:
	FASB ASU No. 2014-01, Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects. These amendments permit reporting entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. Disclosures for a change in accounting principle are required upon transition. ASU 2014-01 is effective for interim and annual periods beginning after December 15, 2014. The Company did not elect to use the proportional amortization method in accounting for investments that qualify for low income housing tax credits. The adoption of ASU 2014-01 did not have a significant impact on the Company's financial statements.
	FASB ASU No. 2014-04, Receivables—Troubled Debt Restructuring by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans Upon Foreclosure. The amendment intends to clarify the terms defining when an in substance foreclosure occurs, which determines when the receivable should be derecognized and the real estate property recognized. ASU No. 2014-04 will be effective for interim and annual periods beginning after December 31, 2014. The adoption of ASU No. 2014-04 did not have a material impact on the Company's consolidated financial statements.
	FASB ASU No. 2014-12, Compensation—Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period. The amendments in ASU 2014-12 require that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. The performance target should not be reflected in estimating the grant-date fair value of the award. Compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved and should represent the compensation cost attributable to the period(s) for which the requisite service has already been rendered. If the performance target becomes probable of being achieved before the end of the requisite service period, the remaining unrecognized compensation cost should be recognized prospectively over the remaining requisite service period. The total amount of compensation cost recognized during and after the requisite service period should reflect the number of awards that are expected to vest and should be adjusted to reflect those awards that ultimately vest. The requisite service period ends when the employee can cease rendering service and still be eligible to vest in the award if the performance target is achieved. ASU 2014-12 is effective for interim and annual periods beginning after December 31, 2014 and did not have a significant impact on the Company's financial statements.
	FASB ASU No. 2015-01, Income Statement—Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items. The amendments in ASU 2015-01 eliminates from U.S. GAAP the concept of extraordinary items. Subtopic 225-20, Income Statement - Extraordinary and Unusual Items, required that an entity separately classify, present, and disclose extraordinary events and transactions. ASU 2015-1 is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2015. The adoption of ASU 2015-1 is not expected to have a significant impact on the Company's financial statements.
	FASB ASU No. 2015-05, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. The amendments in ASU 2015-05 provide guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. ASU 2015-05 is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2015. The adoption of ASU 2015-05 is not expected to have a significant impact on the Company's financial statements.
	FASB ASU No. 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). The amendments in ASU 2015-07 remove the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share practical expedient. The amendments also remove the requirement to make certain disclosures for all investments that are eligible to be measured at fair value using the net asset value per share practical expedient. Rather, those disclosures are limited to investments for which the entity has elected to measure the fair value using that practical expedient.The adoption of ASU 2015-07 is not expected to have a significant impact on the Company's financial statements.

Business_Combinations

Business Combinations	3 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Business Combinations	Business Combinations
	The Company applies the acquisition method of accounting for business combinations under ASC 805 - Business Combinations. Under the acquisition method, the acquiring entity in a business combination recognizes 100 percent of the assets acquired and liabilities assumed at their acquisition date fair values. Management utilizes valuation techniques appropriate for the asset or liability being measured in determining these fair values. Any excess of the purchase price over amounts allocated to assets acquired, including identifiable intangible assets, and liabilities assumed is recorded as goodwill. Where amounts allocated to assets acquired and liabilities assumed is greater than the purchase price, a bargain purchase gain is recognized. Acquisition-related costs are expensed as incurred as merger and integration expense.
	Acquisition of Foster Bankshares, Inc.
	On August 13, 2013, the Company completed the acquisition of Foster Bankshares, Inc. ("Foster"), the holding company of Foster Bank. The Company acquired Foster in order to expand its market in Illinois and into Virginia. Foster's primary subsidiary, Foster Bank, operated eight branches in Illinois and one branch in Virginia.
	Under the terms of the acquisition agreement, Foster shareholders can elect to receive a cash price of $34.6703 per share or, for shareholders who qualified as accredited investors, 2.62771 shares of Company common stock for each share of Foster common stock. As of March 31, 2015, the Company had issued 183,269 shares of Company common stock in exchange for 69,749 shares of Foster common stock and paid $2.0 million for 58,906 shares of Foster common stock. As of March 31, 2015, there were 3,345 shares of Foster common stock that had not been redeemed, and the accrued liability for the unredeemed shares of Foster common stock was $116 thousand.
	The consideration paid, the assets acquired, and the liabilities assumed are summarized in the following table:
		(In thousands)
	Consideration paid:
	BBCN common stock issued in exchange for Foster common stock	$	2,609
	Cash paid for the redemption of Foster common stock	2,042
	Liability for unredeemed Foster common stock	116
	Total consideration paid	$	4,767
	Assets Acquired:
	Cash and cash equivalents	$	42,883
	Investment securities available for sale	4,844
	Loans receivable	255,297
	FRB and FHLB stock	1,714
	OREO	14,251
	Premises and equipment	4,733
	Core deposit intangibles	2,763
	Deferred tax assets, net	21,211
	Other assets	2,353
	Liabilities Assumed:
	Deposits	(321,596		)
	Borrowings	(18,045		)
	Subordinated debentures	(15,309		)
	Other liabilities	(5,857		)
	Total identifiable net assets	$	(10,758	)
	Excess of consideration paid over fair value of net assets acquired (goodwill)	$	15,525
	The $15.5 million of goodwill recognized in the Foster acquisition represents the future economic benefit arising from the acquisition including the creation of a platform that can support future operations and strengthening the Company's existing presence in the Chicago metropolitan area and expansion into the Washington, D.C. market. Goodwill is not amortized for book purposes and is not deductible for tax purposes.
	Acquisition of Pacific International Bancorp, Inc.
	On February 15, 2013, the Company completed the acquisition of Pacific International Bancorp, Inc. ("PIB"), a Seattle based company, pursuant to an Agreement and Plan of Merger, dated October 22, 2012. The Company acquired PIB in order to increase its presence in the Seattle market. PIB's primary subsidiary, Pacific International Bank, a Washington state-chartered bank, operated four bank branches in the Seattle metropolitan area.
	In connection with the acquisition, the consideration paid, the assets acquired, and the liabilities assumed are summarized in the following table:
		(In thousands)
	Consideration paid:
	BBCN common stock issued	$	8,437
	Cash in lieu of fractional shares paid to PIB stockholders	1
	Redemption of Preferred Stock	7,475
	Total consideration paid	$	15,913
	Assets Acquired:
	Cash and cash equivalents	$	25,968
	Investment securities available for sale	7,810
	Loans receivable	131,589
	FRB and FHLB stock	1,829
	OREO	3,418
	Deferred tax assets, net	9,886
	Core deposit intangibles	604
	Other assets	2,514
	Liabilities Assumed:
	Deposits	(143,665		)
	Borrowings	(14,698		)
	Subordinated debentures	(4,108		)
	Other liabilities	(5,116		)
	Total identifiable net assets	$	16,031
	Bargain purchase gain	$	118
	The bargain purchase gain of $118 thousand from the PIB acquisition was recorded in other income in the Consolidated Statements of Income.
	Acquired Loans
	The Company estimated the fair value for most loans acquired by utilizing a methodology wherein loans with comparable characteristics were aggregated by type of collateral, remaining maturity and repricing terms. Cash flows for each pool were determined by estimating future credit losses and prepayment rates. Projected monthly cash flows were then discounted using a risk-adjusted market rate for similar loans to determine the fair value of each pool. To estimate the fair value of the remaining loans, management analyzed the value of the underlying collateral of the loans, assuming the fair values of the loans were derived from the eventual sale of the collateral. The value of the collateral was based on recently completed appraisals adjusted to the valuation date based on recognized industry indices. The Company discounted those values using market derived rates of return, with consideration given to the period of time and costs associated with the foreclosure and disposition of the collateral. There was no carryover of the allowance for loan losses associated with the loans the Company acquired as the loans were initially recorded at fair value. The following table presents loans acquired with deteriorated credit quality as of the date of acquisition:
		Foster			PIB
		(In thousands)
	Contractually required principal and interest at acquisition	$	150,430		$	54,462
	Contractual cash flows not expected to be collected (nonaccretable discount)	37,447			9,687
	Expected cash flows at acquisition	112,983			44,775
	Interest component of expected cash flows (accretable discount)	14,928			4,945
Fair value of acquired impaired loans	$	98,055		$	39,830
The outstanding principal balances and the related carrying amounts of the acquired loans included in the statement of financial condition are $197.6 million and $167.2 million, respectively, for Foster and $78.3 million and $71.0 million, respectively, for PIB, as of March 31, 2015.
Pro Forma Information
The operating results of Foster and PIB from the dates of acquisitions through March 31, 2015 are included in the Condensed Consolidated Statement of Income for 2015 and 2014.
The following unaudited combined pro forma information presents the operating results for the three and nine months ended March 31, 2015 and 2014, as if the Foster and PIB acquisitions had occurred on January 1, 2013:
	Three Months Ended March 31,						Three Months Ended March 31,
	2015			2.014			2015		2.014
	(In thousands, except share data)
Net interest income	$	67,907		$	66,353		$	200,363	$	196,861
Net income	$	21,420		$	22,960		$	65,928	$	60,084
Preferred stock dividends and accretion of preferred stock discount	—			—			—		—
Net income (loss) available to common stockholders	$	—		$	—		$	—	$	—
Pro forma earnings per share:
Basic	$	0.27		$	0.29		$	0.83	$	0.76
Diluted	$	0.27		$	0.29		$	0.83	$	0.75
The above pro forma results are presented for illustrative purposes only and are not intended to represent or be indicative of the actual results of operations of the merged companies that would have been achieved had the acquisitions occurred at January 1, 2013, nor are they intended to represent or be indicative of future results of operations. The pro forma results do not include expected operating cost savings as a result of the acquisitions. These pro forma results require significant estimates and judgments particularly as it relates to the valuation and accretion of income associated with acquired loans.
Acquisition-Related Expenses
The following table presents acquisition-related expenses associated with the Foster and PIB acquisitions which were reflected in the Condensed Consolidated Statements of Income in merger and integration expense. These expenses are comprised primarily of salaries and benefits, occupancy expenses, professional services and other noninterest expense.
	Three Months Ended March 31,						Three Months Ended March 31,
	2014			2013			2014		2013
	(Dollars in thousands)
PIB	$	—		$	(275	)	$	31	$	1,057
Foster	$	66		$	1,206		$	259	$	1,564
Total	$	66		$	931		$	290	$	2,621

StockBased_Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation
	The Company has a stock-based incentive plan, the 2007 BBCN Bancorp Equity Incentive Plan (the “2007 Plan”). The 2007 Plan, approved by the Company's stockholders on May 31, 2007, was amended and restated on July 25, 2007 and again on December 1, 2011. The 2007 Plan provides for grants of stock options, stock appreciation rights (“SARs”), restricted stock, performance shares and performance units (sometimes referred to individually or collectively as “awards”) to non-employee directors, officers, employees and consultants of the Company. Stock options may be either incentive stock options (“ISOs”), as defined in Section 422 of the Internal Revenue Code of 1986, as amended (the “Code”), or nonqualified stock options (“NQSOs”).
	The 2007 Plan gives the Company flexibility to (i) attract and retain qualified non-employee directors, executives and other key employees and consultants with appropriate equity-based awards; (ii) motivate high levels of performance; (iii) recognize employee contributions to the Company’s success; and (iv) align the interests of the 2007 Plan participants with those of the Company’s stockholders. The exercise price for shares under an ISO may not be less than 100% of fair market value on the date the award is granted under Code Section 422. Similarly, under the terms of the 2007 Plan the exercise price for SARs and NQSOs may not be less than 100% of fair market value on the date of grant. Performance units are awarded to a participant at the market price of the Company’s common stock on the date of award (after the lapse of the restriction period and the attainment of the performance criteria). No minimum exercise price is prescribed for performance shares and restricted stock awarded under the 2007 Plan.
	ISOs, SARs and NQSOs have vesting periods of three to five years and have 10-year contractual terms. Restricted stock, performance shares, and performance units will be granted with a restriction period of not less than one year from the grant date for performance-based awards and not more than three years from the grant date for time-based vesting of grants. Compensation expense for awards is recognized over the vesting period.
	The Company has another stock-based incentive plan, the 2006 Stock Incentive Plan, adopted April 12, 2006, as amended and restated June 13, 2007 (the "2006 Plan"). The 2006 Plan provides for the granting of incentive stock options to officers and employees and non-qualified stock options and restricted stock awards to employees (including officers) and non-employee directors. The option prices of all options granted under the 2006 Plan must be not less than 100% of the fair market value at the date of grant. All options granted generally vest at the rate of 20% per year except that the options granted to the non-employee directors vest at the rate of 33% per year. All options not exercised generally expire ten years after the date of grant.
	Under the 2007 Plan and 2006 Plan, 2,499,172 shares were available for future grants as of March 31, 2015.
	The total shares reserved for issuance will serve as the underlying value for all equity awards under the 2007 Plan and 2006 Plan. With the exception of the shares underlying stock options and restricted stock awards, the board of directors may choose to settle the awards by paying the equivalent cash value or by delivering the appropriate number of shares.
	The following is a summary of stock option activity under the 2007 Plan and 2006 Plan for the three months ended March 31, 2015:
		Number of		Weighted-		Weighted-	Aggregate
		Shares		Average		Average	Intrinsic
				Exercise		Remaining	Value
				Price Per		Contractual
				Share		Life (Years)
	Outstanding - January 1, 2015	591,652		$	19
	Granted	—		—
	Exercised	—		—
	Expired	—		—
	Forfeited	—		—
	Outstanding - March 31, 2015	591,652		$	19	1.73	$	—
	Options exercisable - March 31, 2015	381,652		$	20.7	1.73	$	—
	The following is a summary of restricted and performance unit activity under the 2007 Plan and 2006 Plan for the three months ended March 31, 2015:
		Number of		Weighted-
		Shares		Average Grant Date
				Fair Value
	Outstanding - January 1, 2015	175,668		$	13.52
	Granted	5,000		13.69
	Vested	(42,883	)	11.68
	Forfeited	—		—
	Outstanding - March 31, 2015	137,785		$	14.1
	The total fair value of restricted performance units vested for the three months ended March 31, 2015 and 2014 was $575 thousand and $781 thousand, respectively.
	The amount charged against income related to stock-based payment arrangements was $208 thousand and $104 thousand for the three months ended March 31, 2015 and 2014, respectively.
	The income tax benefit recognized was $83 thousand and $43 thousand for the three months ended March 31, 2015 and 2014, respectively.
	At March 31, 2015, the unrecognized compensation expense related to non-vested stock option grants $226 thousand which is expected to be recognized over a weighted average vesting period of 4.28 years. At March 31, 2015, the unrecognized compensation expense related to non-vested restricted units and performance units was $1.7 million which is expected to be recognized over a weighted average vesting period of 3.11 years.

Earnings_Per_Share_EPS

Earnings Per Share ("EPS")	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share ("EPS")	Earnings Per Share (“EPS”)
	Basic EPS does not reflect the possibility of dilution that could result from the issuance of additional shares of common stock upon exercise or conversion of outstanding securities, and is computed by dividing net income by the weighted average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if stock options or other contracts to issue common stock were exercised or converted to common stock that would then share in our earnings. For the three months ended March 31, 2015 stock options and restricted shares awards for 627,818 shares of common stock were excluded in computing diluted earnings per common share because they were antidilutive. Additionally, warrants, issued pursuant to the Company's participation in the U.S. Treasury's TARP Capital Purchase Plan, to purchase 18,882 shares and 18,392 shares of common stock were antidilutive and excluded for the three months ended March 31, 2015 and 2014, respectively.
	The following tables show the computation of basic and diluted EPS for the three months ended March 31, 2015 and 2014.
		Three Months Ended March 31,
		2015					2014
		Net income		Weighted-Average Shares	Per		Net income		Weighted-Average Shares	Per
		(Numerator)		(Denominator)	Share		(Numerator)		(Denominator)	Share
					(Amount)					(Amount)
		(In thousands, except share and per share data)
	Basic EPS - common stock	$	21,358	79,526,218	$	0.27	$	22,196	79,489,579	$	0.28
	Effect of dilutive securities:
	Stock options and performance units			27,359					58,591
	Common stock warrants			48,545					91,669
	Diluted EPS - common stock	$	21,358	79,602,122	$	0.27	$	22,196	79,639,839	$	0.28

Securities_Available_for_Sale

Securities Available for Sale	3 Months Ended
	Mar. 31, 2015
Available-for-sale Securities [Abstract]
Securities Available for Sale	Securities Available for Sale
	The following is a summary of securities available for sale as of the dates indicated:
		At March 31, 2015
		Amortized			Gross			Gross				Estimated
		Cost			Unrealized			Unrealized				Fair Value
					Gains			Losses
		(In thousands)
	Debt securities:
	U.S. Government agency and U.S. Government sponsored enterprises
	Collateralized mortgage obligations	$	328,066		$	2,650		$	(1,413	)		$	329,303
	Mortgage-backed securities	441,097			7,178			(962		)		447,313
	Trust preferred securities	4,535			—			(579		)		3,956
	Municipal bonds	13,782			558			(7		)		14,333
	Total debt securities	787,480			10,386			(2,961		)		794,905
	Mutual funds	17,425			42			—				17,467
		$	804,905		$	10,428		$	(2,961	)		$	812,372
		At December 31, 2014
		Amortized			Gross			Gross				Estimated
		Cost			Unrealized			Unrealized				Fair Value
					Gains			Losses
		(In thousands)
	Debt securities:
	U.S. Government agency and U.S. Government sponsored enterprises
	Collateralized mortgage obligations	$	304,947		$	1,376		$	(3,549	)		$	302,774
	Mortgage-backed securities	460,487			6,528			(1,526		)		465,489
	Trust preferred securities	4,531			—			(544		)		3,987
	Municipal bonds	6,487			443			—				6,930
	Total debt securities	776,452			8,347			(5,619		)		779,180
	Mutual funds	17,425			—			(82		)		17,343
		$	793,877		$	8,347		$	(5,701	)		$	796,523
	As of March 31, 2015 and December 31, 2014, there were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of stockholders' equity.
	For the three months ended March 31, 2015 and 2014, $5.3 million of unrealized gains and $11.1 million of unrealized gains, respectively, were included in accumulated other comprehensive income during the periods. A total of $424 thousand and $0 of net gains on sales of securities were reclassified out of accumulated other comprehensive loss into earnings for the three months ended March 31, 2015 and 2014, respectively.
	The proceeds from sales of securities and the associated gross gains and losses recorded in earnings are listed below:
		Three Months Ended March 31,
		2015			2014
		(In thousands)
	Proceeds	$	22,510		$	—
	Gross gains	424			—
	Gross losses	—			—
	The amortized cost and estimated fair value of debt securities at March 31, 2015, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately.
		Amortized			Estimated
		Cost			Fair Value
		(In thousands)
	Available for sale:
	Due within one year	$	340		$	343
	Due after one year through five years	754			839
	Due after five years through ten years	9,207			9,605
	Due after ten years	8,016			7,502
	U.S. Government agency and U.S. Government sponsored enterprises
	Collateralized mortgage obligations	328,066			329,303
	Mortgage-backed securities	441,097			447,313
	Mutual funds	17,425			17,467
		$	804,905		$	812,372
	Securities with carrying values of approximately $361.0 million and $366.2 million at March 31, 2015 and December 31, 2014, respectively, were pledged to secure public deposits, various borrowings and for other purposes as required or permitted by law.
	The following table shows our investments’ gross unrealized losses and estimated fair value, aggregated by investment category and the length of time that the individual securities have been in a continuous unrealized loss position as of the dates indicated.
		As of March 31, 2015
		Less than 12 months									12 months or longer								Total
	Description of	Number of		Fair Value			Gross				Number of			Fair Value		Gross			Number of	Fair Value		Gross
	Securities	Securities					Unrealized				Securities					Unrealized			Securities			Unrealized
							Losses									Losses						Losses
		(In thousands)
	Collateralized mortgage obligations*	4		$	23,794		$	(66	)		9			$	89,356	$	(1,347	)	13	$	113,150	$	(1,413	)
	Mortgage-backed securities*	6		48,076			(168		)		3			30,672		(794		)	9	78,748		(962		)
	Trust preferred securities	—		—			—				1			3,956		(579		)	1	3,956		(579		)
Municipal bonds	2		1,399			(7		)		—			—		—			2	1,399		(7		)
Mutual funds	—		—			—				—			—		—			—	—		—
	12		$	73,269		$	(241	)		13			$	123,984	$	(2,720	)	25	$	197,253	$	(2,961	)
* Investments in U.S. Government agency and U.S. Government sponsored enterprises
	As of December 31, 2014
	Less than 12 months									12 months or longer								Total
Description of	Number of		Fair Value			Gross				Number of			Fair Value		Gross			Number of	Fair Value		Gross
Securities	Securities					Unrealized				Securities					Unrealized			Securities			Unrealized
						Losses									Losses						Losses
	(In thousands)
Collateralized mortgage obligations*	7		$	71,189		$	(507	)		13			$	133,563	$	(3,042	)	20	$	204,752	$	(3,549	)
Mortgage-backed securities*	7		38,133			(139		)		6			62,036		(1,387		)	13	100,169		(1,526		)
Trust Preferred securities	—		—			—				1			3,988		(544		)	1	3,988		(544		)
Municipal bonds	—		—			—				—			—		—			—	—		—
Mutual funds	—		—			—				1			13,343		(82		)	1	13,343		(82		)
	14		$	109,322		$	(646	)		21			$	212,930	$	(5,055	)	35	$	322,252	$	(5,701	)
* Investments in U.S. Government agency and U.S. Government sponsored enterprises
The Company evaluates securities for other-than-temporary-impairment ("OTTI") on at least a quarterly basis, and more frequently when economic or market concerns warrant such evaluation. Consideration is given to the financial condition and near-term prospects of the issuer, the length of time and the extent to which the fair values of the securities have been less than the cost of the securities, and management's intention to sell, or whether it is more likely than not that management will be required to sell a security in an unrealized loss position before recovery of its amortized cost basis. In analyzing an issuer’s financial condition, the Company considers, among other considerations, whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred, and the results of reviews of the issuer’s financial condition.
The Company has certain collateralized mortgage obligations, mortgage-backed securities and trust preferred securities that were in a continuous unrealized loss position for twelve months or longer as of March 31, 2015. The trust preferred securities at March 31, 2015 had a an unrealized loss of $579 thousand at March 31, 2015. The trust preferred securities are scheduled to mature in May 2047. These securities were rated investment grade and there were no credit quality concerns with the obligor. The collateralized mortgage obligations and mortgage-backed securities in a continuous loss position for twelve months or longer had an unrealized loss of $1.3 million and $794 thousand, respectively at March 31, 2015. These securities were issued by U.S. Government agency and U.S. Government sponsored enterprises and have high credit ratings of "AA" grade or better. Interest on the trust preferred securities and the U.S. Government agency and U.S. Government sponsored enterprise investments have been paid as agreed, and management believes this will continue in the future and that the securities will be repaid in full as scheduled. The market value declines for these securities was primarily due to movements in interest rates and are not reflective of management’s expectations of the Company's ability to fully recover these investments, which may be at maturity. For these reasons, no OTTI was recognized on the trust preferred securities and the U.S. Government agency and U.S. Government sponsored collateralized mortgage obligations and mortgage-backed securities that are in an unrealized loss position at March 31, 2015.
The Company considers the losses on the investments in unrealized loss positions at March 31, 2015 to be temporary based on: 1) the likelihood of recovery; 2) the information relative to the extent and duration of the decline in market value; and 3) the Company’s intention not to sell, and management's determination that it is more likely than not that the Company will not be required to sell a security in an unrealized loss position before recovery of its amortized cost basis.

Loans_Receivable_and_Allowance

Loans Receivable and Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Loans Receivable and Allowance for Loan Losses	Loans Receivable and Allowance for Loan Losses
	The following is a summary of loans receivable by major category:
		March 31, 2015				December 31, 2014
		(In thousands)
	Loan portfolio composition
	Real estate loans:
	Residential	$	23,092			$	21,415
	Commercial & industrial	4,423,331				4,324,349
	Construction	107,705				94,086
	Total real estate loans	4,554,128				4,439,850
	Commercial business	949,701				903,621
	Trade finance	122,560				134,762
	Consumer and other	87,558				89,849
	Total loans outstanding	5,713,947				5,568,082
	Less: deferred loan fees	(3,308		)		(2,890		)
	Loans receivable	5,710,639				5,565,192
	Less: allowance for loan losses	(69,594		)		(67,758		)
	Loans receivable, net of allowance for loan losses	$	5,641,045			$	5,497,434
	The loan portfolio is made up of four segments: real estate loans, commercial business, trade finance and consumer and other. These segments are further segregated between loans accounted for under the amortized cost method ("Legacy Loans") and acquired loans that were originally recorded at fair value with no carryover of the related pre-acquisition allowance for loan losses ("Acquired Loans"). Acquired Loans are further segregated between Acquired Credit Impaired Loans (loans with credit deterioration on the acquisition date and accounted for under ASC 310-30, or "ACILs") and Acquired Performing Loans (loans that were pass graded on the acquisition date and the fair value adjustment is amortized over the contractual life under ASC 310-20, or "APLs").
	The following table presents changes in the accretable discount on the ACILs for the three months ended March 31, 2015 and 2014:
		Three Months Ended March 31,
		2015				2014
		(In thousands)
	Balance at beginning of period	$	24,051			$	47,398
	Accretion	(1,555		)		(4,867		)
	Changes in expected cash flows	149				(9,948		)
	Balance at end of period	$	22,645			$	32,583
	On the acquisition date, the amount by which the undiscounted expected cash flows exceed the estimated fair value of the ACILs is the “accretable yield.” The accretable yield is then measured at each financial reporting date and represents the difference between the remaining undiscounted expected cash flows and the current carrying value of the loans. The accretable yield will change from period to period due to the following: 1) estimates of the remaining life of acquired loans will affect the amount of future interest income; 2) indices for variable rates of interest on ACILs may change; and 3) estimates of the amount of the contractual principal and interest that will not be collected (nonaccretable difference) may change.
	The following tables detail the activity in the allowance for loan losses by portfolio segment for the three months ended March 31, 2015 and 2014:
		Legacy																Acquired													Total
		Real Estate				Commercial Business				Trade Finance				Consumer and Other				Real Estate				Commercial Business			Trade Finance			Consumer and Other
		(In thousands)
	Three Months Ended March 31, 2015
	Balance, beginning of period	$	38,775			$	15,986			$	3,456			$	427			$	8,573			$	485		$	—		$	56		$	67,758
	Provision (credit) for loan losses	(3,621		)		(22		)		(186		)		(1		)		5,310				23			—			(3		)	1,500
	Loans charged off	(182		)		(451		)		(229		)		(13		)		(159		)		(87		)	—			(4		)	(1,125		)
	Recoveries of charge offs	800				655				—				3				—				1			—			2			1,461
	Balance, end of period	$	35,772			$	16,168			$	3,041			$	416			$	13,724			$	422		$	—		$	51		$	69,594
		Legacy																Acquired													Total
		Real Estate				Commercial Business				Trade Finance				Consumer and Other				Real Estate				Commercial Business			Trade Finance			Consumer and Other
		(In thousands)
	Three Months Ended March 31, 2014
	Balance, beginning of period	$	40,068			$	16,796			$	2,653			$	461			$	6,482			$	796		$	—		$	64		$	67,320
	Provision (credit) for loan losses	(1,414		)		2,547				348				7				451				1,011			—			76			3,026
	Loans charged off	(87		)		(3,725		)		(57		)		(1		)		(95		)		(1,220		)	—			(78		)	(5,263		)
	Recoveries of charge offs	19				590				—				—				—				6			—			1			616
	Balance, end of period	$	38,586			$	16,208			$	2,944			$	467			$	6,838			$	593		$	—		$	63		$	65,699
	The following tables disaggregate the allowance for loan losses and the loans outstanding by impairment methodology at March 31, 2015 and December 31, 2014:
		March 31, 2015
		Legacy																Acquired													Total
		Real Estate				Commercial Business				Trade Finance				Consumer and Other				Real Estate				Commercial Business			Trade Finance			Consumer and Other
		(In thousands)
	Allowance for loan losses:
	Individually evaluated for impairment	$	1,882			$	5,921			$	1,393			$	—			$	417			$	286		$	—		$	—		$	9,899
	Collectively evaluated for impairment	33,890				10,247				1,648				416				660				136			—			51			47,048
	ACILs	—				—				—				—				12,647				—			—			—			12,647
	Total	$	35,772			$	16,168			$	3,041			$	416			$	13,724			$	422		$	—		$	51		$	69,594
	Loans outstanding:
	Individually evaluated for impairment	$	55,345			$	39,331			$	6,357			$	470			$	18,894			$	1,689		$	—		$	651		$	122,737
	Collectively evaluated for impairment	4,029,737				842,903				116,203				37,886				354,580				36,771			—			24,619			5,442,699
	ACILs	—				—				—				—				95,572				29,007			—			23,932			148,511
	Total	$	4,085,082			$	882,234			$	122,560			$	38,356			$	469,046			$	67,467		$	—		$	49,202		$	5,713,947
		December 31, 2014
		Legacy																Acquired													Total
	Real Estate				Commercial Business				Trade Finance				Consumer and Other				Real Estate				Commercial Business			Trade Finance			Consumer and Other
	(In thousands)
Allowance for loan losses:
Individually evaluated for impairment	$	1,940			$	6,929			$	1,312			$	—			$	434			$	307		$	—		$	—		$	10,922
Collectively evaluated for impairment	36,835				9,057				2,144				427				792				178			—			56			49,489
ACILs	—				—				—				—				7,347				—			—			—			7,347
Total	$	38,775			$	15,986			$	3,456			$	427			$	8,573			$	485		$	—		$	56		$	67,758
Loans outstanding:
Individually evaluated for impairment	$	57,506			$	40,829			$	5,936			$	465			$	20,035			$	1,778		$	—		$	596		$	127,145
Collectively evaluated for impairment	3,864,289				784,407				128,826				37,312				397,147				43,460			—			25,859			5,281,300
ACILs	—				—				—				—				100,873				33,147			—			25,617			159,637
Total	$	3,921,795			$	825,236			$	134,762			$	37,777			$	518,055			$	78,385		$	—		$	52,072		$	5,568,082
As of March 31, 2015 and December 31, 2014, the liability for unfunded commitments was $1.3 million and $1.6 million, respectively. For the three months ended March 31, 2015 and 2014, the recognized credit or provision for credit losses related to unfunded commitments was $(240) thousand and $41 thousand, respectively.
The recorded investment in individually impaired loans was as follows:
	March 31, 2015				December 31, 2014
	(In thousands)
With allocated allowance
Without charge off	$	65,201			$	67,352
With charge off	1,808				6,582
With no allocated allowance
Without charge off	49,330				46,885
With charge off	6,398				6,326
Allowance on impaired loans	(9,899		)		(10,922		)
Impaired loans, net of allowance	$	112,838			$	116,223
The following tables detail impaired loans (Legacy and APLs that became impaired subsequent to being acquired) as of March 31, 2015 and December 31, 2014 and for the three months ended March 31, 2015 and 2014 and for the year ended December 31, 2014. Loans with no related allowance for loan losses are believed by management to have adequate collateral securing their carrying value.
		As of March 31, 2015												For the Three Months Ended March 31, 2015
Total Impaired Loans		Recorded Investment*				Unpaid Contractual Principal Balance				Related				Average Recorded Investment*				Interest Income Recognized during Impairment
										Allowance
		(In thousands)
With related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		3,911				3,994				127				4,406				44
Hotel & motel		11,585				12,413				393				12,493				129
Gas station & car wash		813				965				343				1,359				—
Mixed use		481				497				10				481				—
Industrial & warehouse		6,921				6,935				31				4,516				76
Other		7,909				8,267				1,395				8,845				88
Real estate—construction		—				—				—				—				—
Commercial business		30,411				30,785				6,207				33,856				287
Trade finance		4,964				8,310				1,393				4,509				35
Consumer and other		14				16				—				7				—
		$	67,009			$	72,182			$	9,899			$	70,472			$	659
With no related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		9,875				11,786				—				10,792				87
Hotel & motel		5,851				7,835				—				5,922				—
Gas station & car wash		3,797				6,358				—				3,245				25
Mixed use		1,998				2,305				—				1,793				9
Industrial & warehouse		9,460				11,189				—				11,917				77
Other		10,158				13,459				—				8,620				38
Real estate—construction		1,480				1,525				—				1,500				—
Commercial business		10,609				12,944				—				7,958				79
Trade finance		1,393				8,650				—				1,638				—
Consumer and other		1,107				1,182				—				1,084				7
		$	55,728			$	77,233			$	—			$	54,469			$	322
Total		$	122,737			$	149,415			$	9,899			$	124,941			$	981
*	Unpaid contractual principal balance less charge offs, interest applied to principal and purchase discounts.
		For the Three Months Ended March 31, 2014
Total Impaired Loans		Average Recorded Investment*				Interest Income Recognized during Impairment
		(In thousands)
With related allowance:
Real estate—residential		$	—			$	—
Real estate—commercial
Retail		5,826				23
Hotel & motel		11,831				133
Gas station & car wash		3,112				19
Mixed use		931				10
Industrial & warehouse		10,188				75
Other		10,137				94
Real estate—construction		—				—
Commercial business		31,269				297
Trade finance		5,490				49
Consumer and other		268				—
		$	79,052			$	700
With no related allowance:
Real estate—residential		$	—			$	—
Real estate—commercial
Retail		6,134				58
Hotel & motel		6,501				—
Gas station & car wash		4,750				—
Mixed use		1,071				—
Industrial & warehouse		6,625				3
Other		2,844				16
Real estate—construction		1,615				21
Commercial business		8,854				61
Trade finance		488				—
Consumer and other		1,123				8
		$	40,005			$	167
Total		$	119,057			$	867
*	Unpaid contractual principal balance less charge offs, interest applied to principal and purchase discounts.
		As of March 31, 2015												For the Three Months Ended March 31, 2015
Impaired APLs		Recorded Investment*				Unpaid				Related				Average Recorded Investment*				Interest Income Recognized during Impairment
						Contractual Principal				Allowance
						Balance
		(In thousands)
With related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		2,602				2,588				66				2,128				37
Hotel & motel														—				—
Gas station & car wash		712				864				339				1,237				—
Mixed use		352				348				2				352				—
Industrial & warehouse		359				359				5				180				5
Other		317				317				6				1,040				4
Real estate—construction														—				—
Commercial business		657				831				286				713				1
Trade finance														—				—
Consumer and other		2				3				—				1				—
		$	5,001			$	5,310			$	704			$	5,651			$	47
With no related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		1,583				1,793				—				2,370				6
Hotel & motel		5,519				7,484				—				5,555				—
Gas station & car wash		1,032				1,079				—				521				15
Mixed use		223				372				—				111				—
Industrial & warehouse		1,224				1,381				—				1,481				1
Other		4,972				6,443				—				4,490				10
Real estate—construction		—				—				—				—				—
Commercial business		1,033				1,771				—				1,021				3
Trade finance		—				—				—				—				—
Consumer and other		649				723				—				622				2
		$	16,235			$	21,046			$	—			$	16,171			$	37
Total		$	21,236			$	26,356			$	704			$	21,822			$	84
*	Unpaid contractual principal balance less charge offs, interest applied to principal and purchase discounts.
		For the Three Months Ended March 31, 2014
Impaired APLs		Average Recorded Investment*				Interest Income Recognized during Impairment
		(In thousands)
With related allowance:
Real estate—residential		$	—			$	—
Real estate—commercial
Retail		248				1
Hotel & motel		—				—
Gas station & car wash		1,786				15
Mixed use		—				—
Industrial & warehouse		2,564				—
Other		1,387				2
Real estate—construction		—				—
Commercial business		1,468				5
Trade finance		—				—
Consumer and other		—				—
		$	7,453			$	23
With no related allowance:
Real estate—residential		$	—			$	—
Real estate—commercial
Retail		1,539				7
Hotel & motel		6,410				—
Gas station & car wash		1,076				—
Mixed use		233				—
Industrial & warehouse		4,213				3
Other		2,179				8
Real estate—construction		—				—
Commercial business		1,215				—
Trade finance		—				—
Consumer and other		860				2
		$	17,725			$	20
Total		$	25,178			$	43
*	Unpaid contractual principal balance less charge offs, interest applied to principal and purchase discounts.
		As of December 31, 2014												For the Year Ended
														31-Dec-14
Total Impaired Loans		Recorded Investment*				Unpaid				Related				Average				Interest Income Recognized during Impairment
						Contractual Principal				Allowance				Recorded Investment*
						Balance
		(In thousands)
With related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		4,902				5,288				390				5,205				127
Hotel & motel		13,401				14,548				469				12,053				532
Gas station & car wash		1,904				3,507				379				2,440				60
Mixed use		482				497				13				823				—
Industrial & warehouse		2,111				2,126				13				7,309				119
Other		9,781				10,389				1,110				9,709				355
Real estate—construction		—				—				—				—				—
Commercial business		37,300				38,730				7,236				32,798				1,502
Trade finance		4,053				11,310				1,312				6,647				—
Consumer and other		—				—				—				114				—
		$	73,934			$	86,395			$	10,922			$	77,098			$	2,695
With no related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		11,708				13,492				—				8,462				358
Hotel & motel		5,992				8,728				—				6,655				—
Gas station & car wash		2,693				4,065				—				4,139				44
Mixed use		1,589				1,697				—				1,415				39
Industrial & warehouse		14,374				17,940				—				9,311				494
Other		7,083				9,886				—				5,118				93
Real estate—construction		1,521				1,545				—				1,583				—
Commercial business		5,307				6,880				—				8,349				50
Trade finance		1,883				5,000				—				724				—
Consumer and other		1,061				1,118				—				1,168				28
		$	53,211			$	70,351			$	—			$	46,924			$	1,106
Total		$	127,145			$	156,746			$	10,922			$	124,022			$	3,801
*	Unpaid contractual principal balance less charge offs, interest applied to principal and purchase discounts.
		As of December 31, 2014												For the Year Ended
														31-Dec-14
Impaired APLs		Recorded Investment*				Unpaid Contractual Principal Balance				Related Allowance				Average Recorded Investment*				Interest Income Recognized during Impairment
		(In thousands)
With related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		1,653				1,638				36				838				97
Hotel & motel		—				—				—				—				—
Gas station & car wash		1,762				1,953				379				1,783				60
Mixed use		352				348				2				212				—
Industrial & warehouse		—				—				—				1,026				—
Other		1,763				2,016				17				1,134				5
Real estate—construction		—				—				—				—				—
Commercial business		769				928				307				1,090				15
Trade finance		—				—				—				—				—
Consumer and other		—				—				—				—				—
		$	6,299			$	6,883			$	741			$	6,083			$	177
With no related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		3,158				3,376				—				1,869				27
Hotel & motel		5,591				7,493				—				6,067				—
Gas station & car wash		9				297				—				621				—
Mixed use		—				—				—				275				—
Industrial & warehouse		1,737				1,954				—				2,673				39
Other		4,009				5,174				—				3,798				41
Real estate—construction		—				—				—				—				—
Commercial business		1,009				1,758				—				1,321				4
Trade finance		—				—				—				—				—
Consumer and other		596				652				—				772				8
		$	16,109			$	20,704			$	—			$	17,396			$	119
Total		$	22,408			$	27,587			$	741			$	23,479			$	296
*	Unpaid contractual principal balance less charge offs, interest applied to principal and purchase discounts.
Generally, loans are placed on nonaccrual status if principal or interest payments become 90 days past due and/or management deems the collectibility of the principal and/or interest to be in question, as well as when required by regulatory requirements. Loans to a customer whose financial condition has deteriorated are considered for nonaccrual status whether or not the loan is 90 days or more past due. Generally, payments received on nonaccrual loans are recorded as principal reductions. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
The following tables present the aging of past due loans as of March 31, 2015 and December 31, 2014 by class of loans:
	As of March 31, 2015
	Past Due and Accruing
	30-59 Days Past Due				60-89 Days Past Due				90 or More Days Past Due				Total				Nonaccrual Loans (2)				Total Delinquent Loans
	(In thousands)
Legacy Loans:
Real estate—residential	$	—			$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail	—				273				—				273				2,441				2,714
Hotel & motel	183				584				—				767				548				1,315
Gas station & car wash	329				241				—				570				2,151				2,721
Mixed use	436				—				—				436				1,120				1,556
Industrial & warehouse	—				—				—				—				1,251				1,251
Other	—				81				—				81				2,988				3,069
Real estate—construction	—				—				—				—				1,480				1,480
Commercial business	3,596				386				—				3,982				8,174				12,156
Trade finance	100				—				—				100				3,047				3,147
Consumer and other	257				—				—				257				12				269
Subtotal	$	4,901			$	1,565			$	—			$	6,466			$	23,212			$	29,678
Acquired Loans: (1)
Real estate—residential	$	—			$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail	—				—				—				—				1,339				1,339
Hotel & motel	—				—				—				—				5,519				5,519
Gas station & car wash	1,032				—				—				1,032				712				1,744
Mixed use	113				—				—				113				574				687
Industrial & warehouse	—				—				—				—				1,151				1,151
Other	—				—				—				—				3,852				3,852
Real estate—construction	—				—				—				—				—				—
Commercial business	133				66				—				199				1,370				1,569
Trade finance	—				—				—				—				—				—
Consumer and other	16				—				—				16				1,026				1,042
Subtotal	$	1,294			$	66			$	—			$	1,360			$	15,543			$	16,903
TOTAL	$	6,195			$	1,631			$	—			$	7,826			$	38,755			$	46,581
(1)	The Acquired Loans exclude ACILs.
(2)	Nonaccrual loans exclude the guaranteed portion of delinquent SBA loans that are in liquidation totaling $26.1 million.
	As of December 31, 2014
	Past Due and Accruing
	30-59 Days Past Due				60-89 Days Past Due				90 or More Days Past Due				Total				Nonaccrual Loans (2)				Total Delinquent Loans
	(In Thousands)
Legacy Loans:
Real estate—residential	$	—			$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail	201				351				—				552				4,586				5,138
Hotel & motel	299				—				—				299				2,336				2,635
Gas station & car wash	—				—				—				—				2,105				2,105
Mixed use	437				—				—				437				930				1,367
Industrial & warehouse	—				208				—				208				2,335				2,543
Other	455				524				—				979				2,150				3,129
Real estate—construction	—				—				—				—				1,521				1,521
Commercial business	655				729				—				1,384				9,640				11,024
Trade finance	—				—				—				—				3,194				3,194
Consumer and other	36				—				—				36				18				54
Subtotal	$	2,083			$	1,812			$	—			$	3,895			$	28,815			$	32,710
Acquired Loans: (1)
Real estate—residential	$	—			$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail	1,402				—				—				1,402				2,792				4,194
Hotel & motel	—				—				—				—				5,591				5,591
Gas station & car wash	—				—				—				—				736				736
Mixed use	345				—				—				345				352				697
Industrial & warehouse	—				—				361				361				1,185				1,546
Other	—				—				—				—				4,370				4,370
Real estate—construction	—				—				—				—				—				—
Commercial business	36				347				—				383				1,468				1,851
Trade finance	—				—				—				—				—				—
Consumer and other	23				90				—				113				1,044				1,157
Subtotal	$	1,806			$	437			$	361			$	2,604			$	17,538			$	20,142
TOTAL	$	3,889			$	2,249			$	361			$	6,499			$	46,353			$	52,852
(1)	The Acquired Loans exclude ACILs.
(2) Nonaccrual loans exclude guaranteed portion of delinquent SBA loans that are in liquidation totaling $28.9 million.
Loans accounted for under ASC 310-30 are generally considered accruing and performing loans and the accretable discount is accreted to interest income over the estimated life of the loan when cash flows are reasonably estimable. Accordingly, ACILs that are contractually past due are still considered to be accruing and performing loans. The loans may be classified as nonaccrual if the timing and amount of future cash flows is not reasonably estimable.
The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt, including, but not limited to, current financial information, historical payment experience, credit documentation, public information, and current economic trends. The Company analyzes loans individually by classifying the loans as to credit risk. This analysis includes all non-homogeneous loans. This analysis is performed at least on a quarterly basis. The definitions for risk ratings are as follows:
•	Pass: Loans that meet a preponderance or more of the Company's underwriting criteria and evidence an acceptable level of risk.
•	Special Mention: Loans that have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position at some future date.
•	Substandard: Loans that are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the repayment of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected.
•	Doubtful/Loss: Loans that have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or repayment in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable.
The following tables present the risk rating for Legacy Loans and Acquired Loans as of March 31, 2015 and December 31, 2014 by class of loans:
	As of March 31, 2015
	Pass				Special				Substandard				Doubtful/Loss				Total
					Mention
	(In thousands)
Legacy Loans:
Real estate—residential	$	22,366			$	—			$	—			$	—			$	22,366
Real estate—commercial
Retail	998,800				19,594				13,262				—				1,031,656
Hotel & motel	817,621				114				5,900				—				823,635
Gas station & car wash	560,789				14,153				8,837				—				583,779
Mixed use	301,984				792				1,576				—				304,352
Industrial & warehouse	398,807				5,571				12,199				—				416,577
Other	754,685				25,572				14,755				—				795,012
Real estate—construction	106,225								1,480				—				107,705
Commercial business	823,050				18,996				39,972				216				882,234
Trade finance	104,595				5,242				12,723				—				122,560
Consumer and other	37,879				7				458				12				38,356
Subtotal	$	4,926,801			$	90,041			$	111,162			$	228			$	5,128,232
Acquired Loans:
Real estate—residential	$	438			$	288			$	—			$	—			$	726
Real estate—commercial
Retail	150,030				3,699				22,038				—				175,767
Hotel & motel	54,108				3,834				9,037				—				66,979
Gas station & car wash	27,352				391				7,801				—				35,544
Mixed use	25,647				6,945				3,006				—				35,598
Industrial & warehouse	56,360				1,536				12,182				—				70,078
Other	69,129				549				14,640				36				84,354
Real estate—construction	—				—				—				—				—
Commercial business	43,488				3,319				19,481				1,179				67,467
Trade finance	—				—				—				—				—
Consumer and other	38,304				1,696				8,470				732				49,202
Subtotal	$	464,856			$	22,257			$	96,655			$	1,947			$	585,715
Total	$	5,391,657			$	112,298			$	207,817			$	2,175			$	5,713,947
	As of December 31, 2014
	Pass				Special				Substandard				Doubtful/Loss				Total
					Mention
	(In thousands)
Legacy Loans:
Real estate—residential	$	20,586			$	—			$	—			$	—			$	20,586
Real estate—commercial
Retail	1,015,195				20,177				14,805				—				1,050,177
Hotel & motel	784,586				114				7,746				—				792,446
Gas station & car wash	553,901				—				8,857				—				562,758
Mixed use	288,409				1,147				2,187				—				291,743
Industrial & warehouse	347,805				9,181				12,313				—				369,299
Other	699,644				28,044				13,013				—				740,701
Real estate—construction	92,564				—				1,521				—				94,085
Commercial business	765,280				18,792				41,138				26				825,236
Trade finance	103,844				18,599				12,319				—				134,762
Consumer and other	37,256				38				470				13				37,777
Subtotal	$	4,709,070			$	96,092			$	114,369			$	39			$	4,919,570
Acquired Loans:
Real estate—residential	$	539			$	290			$	—			$	—			$	829
Real estate—commercial
Retail	157,485				3,531				25,469				—				186,485
Hotel & motel	69,236				3,889				9,241				—				82,366
Gas station & car wash	27,936				369				8,542				268				37,115
Mixed use	25,843				7,001				3,048				—				35,892
Industrial & warehouse	66,214				667				14,177				—				81,058
Other	76,956				2,076				15,242				36				94,310
Real estate—construction	—				—				—				—				—
Commercial business	48,270				6,331				22,721				1,063				78,385
Trade finance	—				—				—				—				—
Consumer and other	40,136				2,089				9,066				781				52,072
Subtotal	$	512,615			$	26,243			$	107,506			$	2,148			$	648,512
Total	$	5,221,685			$	122,335			$	221,875			$	2,187			$	5,568,082
	Three Months Ended March 31,
	2015				2014
Reclassification to held for sale	(In thousands)
Real estate - Commercial	$	384			$	—
Commercial Business	66				—
Total	$	450			$	—
The adequacy of the allowance for loan losses is determined by management based upon an evaluation and review of the credit quality of the loan portfolio, consideration of historical loan loss experience, relevant internal and external factors that affect the collection of a loan, and other pertinent factors.
Migration analysis is a formula methodology derived from the Bank's actual historical net charge off experience for each loan class (type) pool and risk grade. The migration analysis ("Migration Analysis") is centered on the Bank's internal credit risk rating system. Management's internal loan review and external contracted credit review examinations are used to determine and validate loan risk grades. This credit review system takes into consideration factors such as: borrower's background and experience; historical and current financial condition; credit history and payment performance; economic conditions and their impact on various industries; type, fair value and volatility of the fair value of collateral; lien position; and the financial strength of any guarantors.
A general loan loss allowance is provided on loans not specifically identified as impaired (“non-impaired loans”). The Bank's general loan loss allowance has two components: quantitative and qualitative risk factors. The quantitative risk factors are based on a migration analysis methodology described above. The loans are classified by class and risk grade and the historical loss migration is tracked for the various classes. Loss experience is quantified for a specified period and then weighted to place more significance on the most recent loss history. That loss experience is then applied to the stratified portfolio at each quarter end. For ACILs, a general loan loss allowance is provided to the extent that there has been credit deterioration since the date of acquisition.
Additionally, in order to systematically quantify the credit risk impact of other trends and changes within the loan portfolio, the Bank utilizes qualitative adjustments to the Migration Analysis within established parameters. The parameters for making adjustments are established under a Credit Risk Matrix that provides seven possible scenarios for each of the factors below. The matrix allows for up to three positive (Major, Moderate, and Minor), three negative (Major, Moderate, and Minor), and one neutral credit risk scenarios within each factor for each loan type pool. However, if information exists to warrant adjustment to the Migration Analysis, changes are made in accordance with the established parameters supported by narrative and/or statistical analysis. The Credit Risk Matrix and the nine possible scenarios enable the Bank to qualitatively adjust the Loss Migration Ratio by as much as 50 basis points in either direction (positive or negative) for each loan type pool. This matrix considers the following nine factors, which are patterned after the guidelines provided under the FFIEC Interagency Policy Statement on the Allowance for Loan and Lease Losses:
•	Changes in lending policies and procedures, including underwriting standards and collection, charge off, and recovery practices;
•	Changes in national and local economic and business conditions and developments, including the condition of various market segments;
•	Changes in the nature and volume of the loan portfolio;
•	Changes in the experience, ability and depth of lending management and staff;
•	Changes in the trends of the volume and severity of past due loans, Classified Loans, nonaccrual loans, troubled debt restructurings and other loan modifications;
•	Changes in the quality of our loan review system and the degree of oversight by the Directors;
•	Changes in the value of underlying collateral for collateral-dependent loans;
•	The existence and effect of any concentrations of credit and changes in the level of such concentrations; and
•	The effect of external factors, such as competition and legal and regulatory requirements, on the level of estimated losses in our loan portfolio.
The Company also establishes specific loss allowances for loans that have identified potential credit risk conditions or circumstances related to a specific individual credit. The specific allowance amounts are determined by a method prescribed by FASB ASC 310-10-35-22, Measurement of Impairment. The loans identified as impaired will be accounted for in accordance with one of the three acceptable valuation methods: 1) the present value of future cash flows discounted at the loan's effective interest rate; 2) the loan's observable market price; or 3) the fair value of the collateral, if the loan is collateral dependent. For the collateral dependent impaired loans, management obtains a new appraisal to determine the amount of impairment as of the date that the loan became impaired. The appraisals are based on an “as is” valuation. To ensure that appraised values remain current, management either obtains updated appraisals every twelve months from a qualified independent appraiser or an internal evaluation of the collateral is performed by qualified personnel. If the third party market data indicates that the value of the collateral property has declined since the most recent valuation date, management adjusts the value of the property downward to reflect current market conditions. If the fair value of the collateral is less than the recorded amount of the loan, management recognizes impairment by creating or adjusting an existing valuation allowance with a corresponding charge to the provision for loan losses. If an impaired loan is expected to be collected through liquidation of the underlying collateral, the loan is deemed to be collateral dependent and the amount of impairment is charged off against the allowance for loan losses.
The Company considers a loan to be impaired when it is probable that not all amounts due (principal and interest) will be collectible in accordance with the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. The significance of payment delays and payment shortfalls is determined on a case-by-case basis by taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower's prior payment record and the amount of the shortfall in relation to the principal and interest owed.
For commercial business loans, real estate loans and certain consumer loans, management bases the measurement of loan impairment on the present value of the expected future cash flows, discounted at the loan's effective interest rate or on the fair value of the loan's collateral if the loan is collateral dependent. Management evaluates most consumer loans for impairment on a collective basis because these loans generally have smaller balances and are homogeneous in the underwriting of terms and conditions and in the type of collateral.
For ACILs, the allowance for loan losses is based upon expected cash flows for these loans. To the extent that a deterioration in borrower credit quality results in a decrease in expected cash flows subsequent to the acquisition of the loans, an allowance for loan losses would be established based on an estimate of future credit losses over the remaining life of the loans.
The following table presents loans by portfolio segment and impairment method at March 31, 2015 and December 31, 2014:
	As of March 31, 2015
	Real Estate—				Real Estate—				Real Estate—				Commercial				Trade				Consumer			Total
	Residential				Commercial				Construction				Business				Finance				and Other
	(In thousands)
Impaired loans (gross carrying value)	$	—			$	72,759			$	1,480			$	41,020			$	6,357			$	1,121		$	122,737
Specific allowance	$	—			$	2,299			$	—			$	6,207			$	1,393			$	—		$	9,899
Loss coverage ratio	0		%		3.2		%		0		%		15.1		%		21.9		%		0		%	8.1		%
Non-impaired loans	$	23,092			$	4,350,572			$	106,225			$	908,681			$	116,203			$	86,437		$	5,591,210
General allowance	$	146			$	46,295			$	756			$	10,383			$	1,648			$	467		$	59,695
Loss coverage ratio	0.6		%		1.1		%		0.7		%		1.1		%		1.4		%		0.5		%	1.1		%
Total loans	$	23,092			$	4,423,331			$	107,705			$	949,701			$	122,560			$	87,558		$	5,713,947
Total allowance for loan losses	$	146			$	48,594			$	756			$	16,590			$	3,041			$	467		$	69,594
Loss coverage ratio	0.6		%		1.1		%		0.7		%		1.7		%		2.5		%		0.5		%	1.2		%
	As of December 31, 2014
	Real Estate—				Real Estate—				Real Estate—				Commercial				Trade				Consumer			Total
	Residential				Commercial				Construction				Business				Finance				and Other
	(In thousands)
Impaired loans (gross carrying value)	$	—			$	76,020			$	1,521			$	42,607			$	5,936			$	1,061		$	127,145
Specific allowance	$	—			$	2,374			$	—			$	7,236			$	1,312			$	—		$	10,922
Loss coverage ratio	N/A				3.1		%		0		%		17		%		22.1		%		0		%	8.6		%
Non-impaired loans	$	21,415			$	4,248,329			$	92,565			$	861,014			$	128,826			$	88,788		$	5,440,937
General allowance	$	146			$	44,161			$	667			$	9,235			$	2,144			$	483		$	56,836
Loss coverage ratio	0.7		%		1		%		0.7		%		1.1		%		1.7		%		0.5		%	1		%
Total loans	$	21,415			$	4,324,349			$	94,086			$	903,621			$	134,762			$	89,849		$	5,568,082
Total allowance for loan losses	$	146			$	46,535			$	667			$	16,471			$	3,456			$	483		$	67,758
Loss coverage ratio	0.7		%		1.1		%		0.7		%		1.8		%		2.6		%		0.5		%	1.2		%
Under certain circumstances, the Company provides borrowers relief through loan modifications. These modifications are either temporary in nature (“temporary modifications”) or are more substantive. At March 31, 2015, total modified loans were $75.0 million, compared to $76.1 million at December 31, 2014. The temporary modifications generally consist of interest only payments for a three to six month period, whereby principal payments are deferred. At the end of the modification period, the remaining principal balance is re-amortized based on the original maturity date. Loans subject to temporary modifications are generally downgraded to Special Mention or Substandard. At the end of the modification period, the loan either 1) returns to the original contractual terms; 2) is further modified and accounted for as a troubled debt restructuring in accordance with ASC 310-10-35; or 3) is disposed of through foreclosure or liquidation.
Troubled Debt Restructurings (“TDRs”) of loans are defined by ASC 310-40, “Troubled Debt Restructurings by Creditors” and ASC 470-60, “Troubled Debt Restructurings by Debtors” and evaluated for impairment in accordance with ASC 310-10-35. The concessions may be granted in various forms, including reduction in the stated interest rate, reduction in the amount of principal amortization, forgiveness of a portion of a loan balance or accrued interest, or extension of the maturity date. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed on the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification. This evaluation is performed under the Bank's internal underwriting policy.
A summary of TDRs on accrual and nonaccrual status by type of concession as of March 31, 2015 and December 31, 2014 is presented below:
	As of March 31, 2015
	TDRs on Accrual																TDRs on Nonaccrual													Total
	Real Estate—				Commercial				Other				Total				Real Estate—				Commercial			Other			Total
	Commercial				Business												Commercial				Business
	(In thousands)
Payment concession	$	12,137			$	511			$	—			$	12,648			$	3,886			$	479		$	—		$	4,365		$	17,013
Maturity / Amortization concession	3,952				18,887				3,943				26,782				1,039				2,035			1,629			4,703			31,485
Rate concession	13,563				4,911				—				18,474				7,762				42			174			7,978			26,452
Principal forgiveness	—				—				—				—				—				14			—			14			14
	$	29,652			$	24,309			$	3,943			$	57,904			$	12,687			$	2,570		$	1,803		$	17,060		$	74,964
	As of December 31, 2014
	TDRs on Accrual																TDRs on Nonaccrual													Total
	Real Estate—				Commercial				Other				Total				Real Estate—				Commercial			Other			Total
	Commercial				Business												Commercial				Business
	(In thousands)
Payment concession	$	12,235			$	556			$	—			$	12,791			$	3,840			$	517		$	—		$	4,357		$	17,148
Maturity / Amortization concession	2,189				20,053				3,387				25,629				1,207				3,158			1,550			5,915			31,544
Rate concession	13,684				5,024				—				18,708				8,473				80			176			8,729			27,437
Principal forgiveness	—				—				—				—				—				15			—			15			15
	$	28,108			$	25,633			$	3,387			$	57,128			$	13,520			$	3,770		$	1,726		$	19,016		$	76,144
TDRs on accrual status are comprised of loans that were accruing at the time of restructuring and for which the Bank anticipates full repayment of both principal and interest under the restructured terms. TDRs that are on nonaccrual status can be returned to accrual status after a period of sustained performance, generally determined to be six months of timely payments as modified.  Sustained performance includes the periods prior to the modification if the prior performance met or exceeded the modified terms.  TDRs on accrual status at March 31, 2015 were comprised of 26 commercial real estate loans totaling $29.7 million, 29 commercial business loans totaling $24.3 million, and 3 consumer and other loans totaling $3.9 million. TDRs on accrual status at December 31, 2014 were comprised of 24 commercial real estate loans totaling $28.1 million, 30 commercial business loans totaling $25.6 million and 3 consumer and other loans totaling $3.4 million.  The Company expects that the TDRs on accrual status as of March 31, 2015, which were all performing in accordance with their restructured terms, to continue to comply with the restructured terms because of the reduced principal or interest payments on these loans. TDRs that were restructured at market interest rates and had sustained performance as agreed under the modified loan terms may be reclassified as non-TDRs after each year end but are reserved for under ASC 310-10.
The Company has allocated $3.7 million and $5.7 million of specific reserves to TDRs as of March 31, 2015 and December 31, 2014, respectively.
The following table presents loans by class modified as TDRs that occurred during the three months ended March 31, 2015 and 2014:
	Three Months Ended March 31, 2015											Three Months Ended March 31, 2014
	Number of			Pre-				Post-				Number of			Pre-				Post-
	Loans			Modification				Modification				Loans			Modification				Modification
	(Dollars in thousands)
Legacy Loans:
Real estate—commercial
Retail	—			$	—			$	—			—			$	—			$	—
Hotel & motel	—			—				—				—			—				—
Gas station & car wash	1			142				137				—			—				—
Mixed use	—			—				—				—			—				—
Industrial & warehouse	—			—				—				—			—				—
Other	2			1,762				1,765				1			1,023				1,018
Real estate - construction	—			—				—				—			—				—
Commercial business	2			91				46				2			296				121
Trade finance	—			—				—				—			—				—
Consumer and other	—			—				—				1			195				192
Subtotal	5			$	1,995			$	1,948			4			$	1,514			$	1,331
Acquired Loans:
Real estate—commercial
Retail	—			$	—			$	—			2			$	1,075			$	1,062
Hotel & motel	—			—				—				—			—				—
Gas station & car wash	—			—				—				1			794				756
Mixed use	—			—				—				—			—				—
Industrial & warehouse	1			361				359				1			75				74
Other	—			—				—				1			1,023				1,001
Real estate—construction	—			—				—				—			—				—
Commercial business	—			—				—				7			457				215
Trade finance	—			—				—				—			—				—
Consumer and other	—			—				—				1			195				187
Subtotal	1			$	361			$	359			13			$	3,619			$	3,295
Total	6			$	2,356			$	2,307			17			$	5,133			$	4,626
The specific reserves for the TDRs that occurred during the three ended March 31, 2015 totaled $5 thousand and there were $43 thousand in charge offs for the three months ended March 31, 2015. The specific reserves for the TDRs that occurred during the three months ended March 31, 2014 totaled $535 thousand and there were $18 thousand in charge offs for the three months ended March 31, 2014.
The following table presents loans by class for TDRs that have been modified within the previous twelve months and have subsequently had a payment default during the three months ended March 31, 2015 and 2014:
	Three Months Ended							Three Months Ended
	31-Mar-15							31-Mar-14
	Number of Loans			Balance				Number of Loans			Balance
	(Dollars In thousands)
Legacy Loans:
Real estate—commercial
Retail	—			$	—			—			$	—
Gas station & car wash	1			137				—			—
Industrial & warehouse	1			21				—			—
Other	1			348				—			—
Commercial business	1			14				2			536
Subtotal	4			$	520			2			$	536
Acquired Loans:
Real estate—commercial
Retail	2			$	1,025			2			$	268
Gas station & car wash	—			—				—			—
Hotel & motel	—			—				—			—
Industrial & warehouse	—			—				—			—
Other	—			—				—			—
Commercial business	1			48				2			44
Subtotal	3			$	1,073			4			$	312
	7			$	1,593			6			$	848
A loan is considered to be in payment default once it is 30 days contractually past due under the modified terms. As of March 31, 2015, the specific reserves totaled $11 thousand for the TDRs that had payment defaults during the three months ended March 31, 2015, respectively., and as of March 31, 2014, the specific reserves totaled $45 thousand. The total charge offs for the TDRs that had payment defaults during the three months ended March 31, 2015 were $0, and the charge offs totaled $480 thousand for the three months ended March 31, 2014.
There were four Legacy Loans that subsequently defaulted during the three months ended March 31, 2015 that were modified as follows: one Commercial Business loan totaling $14 thousand was modified through payment concession, two Real Estate Commercial loans totaling $158 thousand were modified through payment concessions, and one Real Estate Commercial loan totaling $348 thousand was modified through maturity concession.
There were three Acquired Loans that defaulted during the three months ended March 31, 2015 that were modified as follows: one Commercial Business loan totaling $48 thousand were modified through rate concession, one Real Estate Commercial loan totaling $906 thousand was modified through payment concession, and one Real Estate Commercial loan totaling $119 thousand was modified through rate concession.
There were two Commercial Business Legacy Loans that defaulted during the three months ended March 31, 2014. The loans totaled $536 thousand and were modified through a maturity/amortization concession.
There were four Acquired Loans that defaulted during the three months ended March 31, 2014 which were modified as follows: two Commercial Business loans totaling $44 thousand were modified through payment concessions and two Real Estate Commercial loans totaling $268 thousand were modified through payment concessions.
Covered Assets
On April 16, 2010, the Department of Financial Institutions closed Innovative Bank, California, and appointed the FDIC as its receiver. On the same date, the Bank assumed the banking operations of Innovative Bank from the FDIC under a purchase and assumption agreement and two related loss sharing agreements with the FDIC.
Covered nonperforming assets totaled $1.4 million and $1.5 million at March 31, 2015 and December 31, 2014, respectively. These covered nonperforming assets are subject to the loss sharing agreements with the FDIC. The covered nonperforming assets at March 31, 2015 and December 31, 2014 were as follows:
	March 31, 2015				December 31, 2014
	(In thousands)
Covered loans on nonaccrual status	$	1,304			$	1,355
Covered OREO	96				96
Total covered nonperforming assets	$	1,400			$	1,451
Acquired covered loans	$	30,708			$	32,560
Related Party Loans
In the ordinary course of business, the Company enters into loan transactions with certain of its directors or associates of such directors (“Related Parties”). The loans to Related Parties are on substantially the same terms and conditions, including interest rates and collateral, as those prevailing at the same time for comparable transactions with unrelated parties. In management’s opinion, these transactions did not involve more than normal credit risk or present other unfavorable features. All loans to Related Parties were current as of March 31, 2015 and December 31, 2014, and the outstanding principal balance as of March 31, 2015 and December 31, 2014 was $3.6 million and $3.7 million, respectively.

Borrowings

Borrowings	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Borrowings	Borrowings
	The Company maintains a secured credit facility with the FHLB against which the Bank may take advances. The borrowing capacity is limited to the lower of 30% of the Bank’s total assets or the Bank’s collateral capacity, which was $2.22 billion at March 31, 2015 and $2.17 billion at December 31, 2014. The terms of this credit facility require the Company to pledge eligible collateral with the FHLB equal to at least 100% of outstanding advances.
	At March 31, 2015 and December 31, 2014, real estate secured loans with a carrying amount of approximately $2.95 billion and $2.89 billion, respectively, were pledged as collateral for borrowings from the FHLB. At March 31, 2015 and December 31, 2014, other than FHLB stock, no securities are pledged as collateral for borrowings from the FHLB.
	At March 31, 2015 and December 31, 2014, FHLB advances were $480.9 million and $481.0 million, respectively, had a weighted average interest rate of 1.09% and 1.09%, respectively, and had various maturities through October 2019. At March 31, 2015 and December 31, 2014, $20.9 million and $21.0 million, respectively, of the advances were putable advances with various putable dates and strike prices. The cost of FHLB advances as of March 31, 2015 ranged between 0.47% and 3.67%. At March 31, 2015, the Company had a remaining borrowing capacity of $1.74 billion.
	At March 31, 2015, the contractual maturities for FHLB advances were as follows:
		Contractual		Maturity/
		Maturities		Put Date
		(In thousands)
	Due within one year	$	50,000	$	70,881
	Due after one year through five years	430,881		410,000
		$	480,881	$	480,881
	In addition, as a member of the FRB system, the Bank may also borrow from the FRB of San Francisco. The maximum amount that the Bank may borrow from the FRB’s discount window is up to 95% of the outstanding principal balance of the qualifying loans and the fair value of the securities that are pledged. At March 31, 2015, the outstanding principal balance of the qualifying loans was $624.9 million, and the collateral value of investment securities was $1.4 million. There were no borrowings outstanding against this line as of March 31, 2015 and December 31, 2014.

Derivative_Financial_Instrumen

Derivative Financial Instruments (Notes)	3 Months Ended
	Mar. 31, 2015
Derivative Financial Instruments [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	Derivative Financial Instruments
	The Company offers a loan hedging program to certain loan customers.  Through this program, the Company originates a variable rate loan with the customer.  The Company and the customer will then enter into a fixed interest rate swap. Lastly, an identical offsetting swap is entered into by the Company with a correspondent bank. These “back to back” swap arrangements are intended to offset each other and allow the Company to book a variable rate loan, while providing the customer with a contract for fixed interest payments. In these arrangements, the Company’s net cash flow is equal to the interest income received from the variable rate loan originated with the customer. These customer swaps are not designated as hedging instruments and are recorded at fair value in other assets and other liabilities.  The changes in fair value are recognized in the income statement in other income and fees.
	At March 31, 2015, the following interest rate swaps related to our loan hedging program were outstanding
		As of March 31, 2015
	Interest rate swaps on loans with loan customers
	Notional amount (in thousands)	$	79,662
	Weighted average remaining term	7.3 years
	Received fixed rate (weighted average)	4.35		%
	Pay variable rate (weighted average)	2.5		%
	Estimated fair value	$	2,764
	Back to back interest rate swaps with correspondent banks
	Notional amount (in thousands)	$	79,662
	Weighted average remaining term	7.3 years
	Received variable rate (weighted average)	2.5		%
	Pay fixed rate (weighted average)	4.35		%
	Estimated fair value	$	(2,764	)

Subordinated_Debentures

Subordinated Debentures	3 Months Ended
	Mar. 31, 2015
Subordinated Borrowings [Abstract]
Subordinated Debentures	Subordinated Debentures
	At March 31, 2015, the Company had five wholly-owned subsidiary grantor trusts that had issued $46 million of pooled trust preferred securities. Trust preferred securities accrue and pay distributions periodically at specified annual rates as provided in the indentures. The trusts used the net proceeds from the offering to purchase a like amount of subordinated debentures (the “Debentures”) of BBCN Bancorp. The Debentures are the sole assets of the trusts. The Company’s obligations under the subordinated debentures and related documents, taken together, constitute a full and unconditional guarantee by the Company of the obligations of the trusts. The trust preferred securities are mandatorily redeemable upon the maturity of the Debentures, or upon earlier redemption as provided in the indentures. The Company has the right to redeem the Debentures in whole (but not in part) on or after specific dates, at a redemption price specified in the indentures plus any accrued but unpaid interest to the redemption date. The Company also has a right to defer consecutive payments of interest on the debentures for up to five years.
	The following table is a summary of trust preferred securities and Debentures at March 31, 2015:
	Issuance Trust	Issuance	Trust		Carrying Value of Subordinated		Rate	Stated Rate		Effective Rate			Maturity
		Date	Preferred		Debentures		Type						Date
			Security
			Amount
			(Dollars in thousands)
	Nara Capital Trust III	6/5/03	$	5,000	$	5,155	Variable	3.42	%	3.42	%		6/15/33
	Nara Statutory Trust IV	12/22/03	5,000		5,155		Variable	3.1	%	3.1	%		1/7/34
	Nara Statutory Trust V	12/17/03	10,000		10,310		Variable	3.22	%	3.22	%		12/17/33
	Nara Statutory Trust VI	3/22/07	8,000		8,248		Variable	1.92	%	1.92	%		6/15/37
	Center Capital Trust I	12/30/03	18,000		13,331		Variable	3.1	%	5.56	%	(1)	1/7/34
	TOTAL ISSUANCE		$	46,000	$	42,199
	(1) The Center Capital Trust I trust preferred security has a remaining discount of $5.3 million at March 31, 2015. The effective rate of the security includes the effect of the remaining discount accretion.
	The Company’s investment in the common trust securities of the issuer trusts of $1.5 million and $1.6 million at March 31, 2015 and December 31, 2014, respectively, is included in other assets. Although the subordinated debt issued by the trusts are not included as a component of stockholders' equity in the consolidated balance sheets, the debt is treated as capital for regulatory purposes. The trust preferred security debt issuances are includable in Tier I capital up to a maximum of 25% of capital on an aggregate basis. Any amount that exceeds 25% qualifies as Tier 2 capital. At March 31, 2015, $40.8 million of the trusts’ securities qualified as Tier 1 capital.

Intangible_Assets

Intangible Assets	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets
	The carrying amount of the Company's goodwill as of March 31, 2015 and December 31, 2014 was $105.4 million. There was no impairment of goodwill during the three month periods ended March 31, 2015 and 2014.
	Core deposit intangible assets are amortized over their estimated lives, which range from seven to ten years. Amortization expense related to core deposit intangible assets totaled $267 thousand and $324 thousand for the three months ended March 31, 2015 and 2014, respectively. The following table provides information regarding the core deposit intangibles at March 31, 2015:
				As of March 31, 2015
		Amortization period		Gross			Accumulated
				Carrying			Amortization
				Amount
	Core deposit—Center Financial Corporation acquisition	7 years		$	4,100		$	(2,828	)
	Core deposit—PIB acquisition	7 years		603			(297		)
	Core deposit—Foster acquisition	10 years		2,763			(721		)
	Total			$	7,466		$	(3,846	)
	Servicing assets are recognized when SBA loans are sold with servicing retained with the income statement effect recorded in gains on sales of SBA loans. Servicing assets are initially recorded at fair value based on the present value of the contractually specified servicing fee, net of servicing costs, over the estimated life of the loan, using a discount rate based on the related note rate. The Company's servicing costs approximates the industry average servicing costs of 40 basis points. All classes of servicing assets are subsequently measured using the amortization method which requires servicing rights to be amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans.
	Management periodically evaluates servicing assets for impairment based upon the fair value of the rights as compared to the carrying amount. Impairment is determined by stratifying rights into groupings based on loan type. Impairment is recognized through a valuation allowance for an individual grouping, to the extent that fair value is less than the carrying amount.
	The changes in servicing assets for the three months ended March 31, 2015 and 2014 were as follows:
			Three Months Ended March 31,
			2015			2014
			(In thousands)
	Balance at beginning of period		$	10,341		$	8,915
	Additions through originations of servicing assets		1,045			815
	Amortization		(857		)	(607		)
	Balance at end of period		$	10,529		$	9,123
	The Company utilizes the discounted cash flow method to calculate the initial excess servicing assets. The inputs used in determining the fair value of the servicing assets at March 31, 2015 and December 31, 2014 are presented below.
			March 31, 2015			December 31, 2014
			Range			Range
	Weighted-average discount rate		5.30% ~ 5.68%			5.44% ~ 5.74%
	Constant prepayment rate		7.00% ~ 11.90%			8.80% ~12.40%

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The Company and its subsidiaries are subject to U.S. federal income tax, as well as state income taxes.  The Company had total unrecognized tax benefits of $1.8 million and $1.8 million at March 31, 2015 and December 31, 2014, respectively, that relate primarily to uncertainties related to California enterprise zone loan interest deductions.
	Management does not expect the total amount of unrecognized tax benefits to significantly change in the next twelve months.
	The statute of limitations related to the consolidated Federal income tax returns is closed for all tax years up to and including 2009. The expiration of the statute of limitations related to the various state income and franchise tax returns varies by state. The Company is currently under examination by the Internal Revenue Service (IRS) for the 2011 tax year and by the California Franchise Tax Board (FTB) for the 2009 and 2010 tax years. While the outcome of the examinations is unknown, the Company expects no material adjustments. The Company recognizes interest and penalties related to income tax matters in income tax expense.  The Company recorded approximately $110 thousand and $96 thousand for accrued interest and penalties at March 31, 2015 and December 31, 2014, respectively.
	Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.
	Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion, or all, of the deferred tax asset will not be realized. In assessing the realization of deferred tax assets, management evaluates both positive and negative evidence, including the existence of any cumulative losses in the current year and the prior two years, the amount of taxes paid in available carry-back years, the forecasts of future income, applicable tax planning strategies, and assessments of current and future economic and business conditions. This analysis is updated quarterly and adjusted as necessary. Based on the analysis, the Company has determined that a valuation allowance for deferred tax assets was not required as of March 31, 2015.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements
	FASB ASC 820, Fair Value Measurements and Disclosures, establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value:
	Level 1:	Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date.
	Level 2:	Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.
	Level 3:	Significant unobservable inputs that reflect estimates of assumptions that market participants would use in pricing the asset or liability.
	Securities Available for Sale
	The fair values of securities available for sale are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1 inputs) or matrix pricing, which is a technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs).
	The fair values of the Company's Level 3 securities available for sale were measured using an income approach valuation technique. The primary inputs and assumptions used in the fair value measurement were derived from the securities' underlying collateral, which included discount rates, prepayment speeds, payment delays, and an assessment of the risk of default of the underlying collateral, among other factors. Significant increases or decreases in any of the inputs or assumptions would result in a significant increase or decrease in the fair value measurement.
	Impaired Loans
	The fair values of impaired loans are generally measured for impairment using the practical expedients permitted by FASB ASC 310-10-35 including impaired loans measured at an observable market price (if available), or at the fair value of the loan’s collateral (if the loan is collateral dependent). Fair value of the loan’s collateral, when the loan is dependent on collateral, is determined by appraisals or independent valuation and result in a Level 2.
	OREO
	OREO is fair valued at the time the loan is foreclosed upon and the asset is transferred to OREO. The value is based primarily on third party appraisals, less costs to sell and result in a Level 2 classification of the inputs for determining fair value. OREO is reviewed and evaluated on at least an annual basis for additional impairment and adjusted to lower of cost or market accordingly, based on the same factors identified above.
	Loans held for sale
	Loans held for sale are carried at the lower of cost or fair value, as determined by outstanding commitments from investors, or based on recent comparable sales (Level 2 inputs), if available, and if not available, are based on discounted cash flows using current market rates applied to the estimated life and credit risk (Level 3 inputs) or may be assessed based upon the fair value of the collateral, which is obtained from recent real estate appraisals (Level 3 inputs). These appraisals may utilize a single valuation approach or a combination of approaches including the income approach. Adjustments are routinely made in the appraisal process by the appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are typically significant and result in Level 3 classification of the inputs for determining fair value.
	Assets and liabilities measured at fair value on a recurring basis are summarized below:
					Fair Value Measurements at the End of the Reporting Period Using
		March 31, 2015			Quoted Prices			Significant		Significant
					in Active			Other		Unobservable
					Markets for			Observable		Inputs
					Identical Assets			Inputs		(Level 3)
					(Level 1)			(Level 2)
		(In thousands)
	Assets:
	Securities available for sale:
	GSE collateralized mortgage obligations	$	329,303		$	—		$	329,303	$	—
	GSE mortgage-backed securities	447,313			—			447,313		—
	Trust preferred securities	3,956			—			3,956		—
	Municipal bonds	14,333			—			13,138		1,195
	Mutual funds	17,467			17,467			—		—
					Fair Value Measurements at the End of the Reporting Period Using
		December 31, 2014			Quoted Prices			Significant		Significant
					in Active			Other		Unobservable
					Markets for			Observable		Inputs
					Identical Assets			Inputs		(Level 3)
					(Level 1)			(Level 2)
		(In thousands)
	Assets:
	Securities available for sale:
	GSE collateralized mortgage obligations	$	302,774		$	—		$	302,774	$	—
	GSE mortgage-backed securities	465,489			—			465,489		—
	Trust preferred securities	3,987			—			3,987		—
	Municipal bonds	6,930			—			5,752		1,178
	Mutual funds	17,343			17,343			—		—
	There were no transfers between Level 1, 2 and 3 during the period ended March 31, 2015 and 2014. There were no gains or losses recognized in earnings.
	The table below presents a reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2015:
			Three Months Ended March 31,
			2015			2014
			(In thousands)
	Beginning Balance, January 1		$	1,178		$	1,112
	Purchases, issuances and settlements		—			—
	Amortization		—			—
	Total gains or (losses) included in earnings		—			—
	Total gains included in other comprehensive income		17			20
	Ending Balance, March 31		$	1,195		$	1,132
	Assets measured at fair value on a non-recurring basis are summarized below:
					Fair Value Measurements at the End of the Reporting Period Using
		March 31, 2015			Quoted Prices			Significant		Significant
					in Active			Other		Unobservable
					Markets for			Observable		Inputs
					Identical Assets			Inputs		(Level 3)
					(Level 1)			(Level 2)
		(In thousands)
	Assets:
	Impaired loans at fair value:
Real estate loans	$	37,813		$	—		$	37,813	$	—
Commercial business	5,545			—			5,545		—
Trade finance	1,654			—			1,654		—
Consumer	584			—			584		—
Loans held for sale, net	1,554			—			1,554		—
OREO	3,065			—			3,065		—
				Fair Value Measurements at the End of the Reporting Period Using
	December 31, 2014			Quoted Prices			Significant		Significant
				in Active			Other		Unobservable
				Markets for			Observable		Inputs
				Identical Assets			Inputs		(Level 3)
				(Level 1)			(Level 2)
	(In thousands)
Assets:
Impaired loans at fair value:
Real estate loans	$	43,708		$	—		$	43,708	$	—
Commercial business	4,114			—			4,114		—
Trade Finance	1,883			—			1,883		—
Consumer	596			—			596		—
Loans held for sale, net	2,000			—			2,000		—
OREO	17,985			—			17,985		—
For assets measured at fair value on a non-recurring basis, the total net gains (losses), which include charge offs, recoveries, specific reserves, and gains and losses on sales recognized are summarized below:
	For the Three Months ended March 31,
	2015			2014
	(In thousands)
Assets:
Impaired loans at fair value:
Real estate loans	$	534		$	1,704
Commercial business	1,274			(10,715		)
Trade Finance	(310		)	(659		)
Consumer	(12		)	(46		)
Loans held for sale, net	182			—
OREO	(425		)	(11		)
Fair Value of Financial Instruments
Carrying amounts and estimated fair values of financial instruments, not previously presented, at March 31, 2015 and December 31, 2014 were as follows:
	March 31, 2015
	Carrying			Estimated			Fair Value Measurement Using
	Amount			Fair Value
	(In thousands)
Financial Assets:
Cash and cash equivalents	$	429,871		$	429,871		Level 1
Loans held for sale	26,432			27,676			Level 2
Loans receivable—net	5,641,045			5,998,374			Level 3
Customers’ liabilities on acceptances	1,029			1,029			Level 2
Financial Liabilities:
Noninterest bearing deposits	$	1,616,935		$	1,616,935		Level 2
Saving and other interest bearing demand deposits	1,785,990			1,785,990			Level 2
Time deposits	2,400,329			2,404,910			Level 2
FHLB advances	480,881			483,574			Level 2
Subordinated debentures	42,199			43,970			Level 2
Bank’s liabilities on acceptances outstanding	1,029			1,029			Level 2
	December 31, 2014
	Carrying			Estimated			Fair Value Measurement Using
	Amount			Fair Value
	(In thousands)
Financial Assets:
Cash and cash equivalents	$	462,160		$	462,160		Level 1
Loans held for sale	28,311			29,626			Level 2
Loans receivable—net	5,497,434			5,826,924			Level 3
Customers’ liabilities on acceptances	1,889			1,889			Level 2
Financial Liabilities:
Noninterest bearing deposits	$	1,543,018		$	1,543,018		Level 2
Saving and other interest bearing demand deposits	1,862,060			1,862,060			Level 2
Time deposits	2,288,374			2,292,831			Level 2
FHLB advances	480,975			481,290			Level 2
Subordinated debentures	42,158			43,987			Level 2
Bank’s liabilities on acceptances outstanding	1,889			1,889			Level 2
The methods and assumptions used to estimate fair value are described as follows:
The carrying amount is the estimated fair value for cash and cash equivalents, savings and other interest bearing demand deposits, accrued interest receivable and payable, customer’s and Bank’s liabilities on acceptances, noninterest bearing deposits, short-term debt, secured borrowings and variable rate loans or deposits that reprice frequently and fully. For fixed rate loans or deposits and for variable rate loans or deposits with infrequent repricing or repricing limits, fair value is based on discounted cash flows using current market rates applied to the estimated life and credit risk. The allowance for loan losses is considered to be a reasonable estimate of discount for credit quality concerns. Fair value of SBA loans held for sale is based on market quotes. For fair value of non-SBA loans held for sale, see the measurement method discussed previously. Fair value of time deposits and debt is based on current rates for similar financing. It was not practicable to determine the fair value of FRB stock or FHLB stock due to restrictions placed on their transferability. The fair value of commitments to fund loans represents fees currently charged to enter into similar agreements with similar remaining maturities and is not presented herein. The fair value of these financial instruments is not material to the consolidated financial statements.

Stockholders_Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2015
Stockholders’ Equity and Regulatory Matters [Abstract]
Stockholders’ Equity	Stockholders’ Equity
	In June 2012, the Company redeemed all of the Fixed Rate Cumulative Perpetual Preferred Stock issued under the U.S. Treasury Department's TARP Capital Purchase Program. As of March 31, 2015, a warrant held by the U.S. Treasury Department for the purchase of 349,016 shares of the Company's common stock remains outstanding.
	The Company assumed a warrant (related to the TARP Capital Purchase Plan) to purchase shares of its common stock. As of March 31, 2015, the U.S. Treasury Department held the warrant for the purchase of 18,883 shares of the Company's common stock.
	The Company's Board of Directors declared quarterly dividends of $0.10 per common share for the first quarter of 2015 and $0.075 per common share for the first quarter of 2014.
	The following table presents the components of accumulated other comprehensive loss at March 31, 2015 and December 31, 2014:
		March 31, 2015		December 31, 2014
		(In thousands)
	Net unrealized gain on securities available for sale	$	4,409	$	1,631
	Net unrealized gain on interest-only strips	79		74
	Total accumulated other comprehensive loss	$	4,488	$	1,705

Regulatory_Matters

Regulatory Matters	3 Months Ended
	Mar. 31, 2015
Banking and Thrift [Abstract]
Regulatory Matters	Regulatory Matters
	The Company and the Bank are subject to various regulatory capital requirements administered by the federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material and adverse effect on the Company’s and the Bank’s financial statements, such as restrictions on growth or the payment of dividends or other capital distributions or management fees. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance-sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Prompt corrective action provisions are not applicable to bank holding companies.
	In July, 2013, the federal bank regulatory agencies adopted final regulations, which revised their risk-based and leverage capital requirements for banking organizations to meet requirements of Dodd-Frank and to implement Basel III international agreements reached by the Basel Committee. The final rules began for the Company and the Bank on January 1, 2015 and are subject to a phase-in period through January 1, 2019. The final rules that had an impact on the Company and the Bank include:
	•	An increase in the minimum Tier 1 capital ratio from 4.00% to 6.00% of risk-weighted assets;
	•	A new category and a required 4.50% of risk-weighted assets ratio is established for “common equity Tier 1” as a subset of Tier 1 capital limited to common equity;
	•	A minimum non-risk-based leverage ratio is set at 4.00%, eliminating a 3.00% exception for higher rated banks;
	•	Changes in the permitted composition of Tier 1 capital to exclude trust preferred securities, mortgage servicing rights and certain deferred tax assets and include unrealized gains and losses on available for sale debt and equity securities;
	•	The risk-weights of certain assets for purposes of calculating the risk-based capital ratios are changed for high volatility commercial real estate acquisition, development and construction loans, certain past due non-residential mortgage loans and certain mortgage-backed and other securities exposures; and
	•	A new additional capital conservation buffer of 2.5% of risk weighted assets over each of the required capital ratios will be phased in from 2016 to 2019 and must be met to avoid limitations on the ability of the Bank to pay dividends, repurchase shares or pay discretionary bonuses.
	Management believes that the capital ratios for the Company and the Bank under Basel III will continue to exceed the well capitalized minimum capital requirements. As of March 31, 2015, the ratios for the Company and the Bank are sufficient to meet the fully phased-in conservation buffer.
	As of March 31, 2015 and December 31, 2014, the most recent regulatory notification categorized the Bank as "well-capitalized" under the regulatory framework for prompt corrective action. To be categorized as "well-capitalized", the Bank must maintain minimum total risk-based, Tier I risk-based and Tier I leverage ratios as set forth in the table below. There are no conditions or events since the notification that management believes have changed the Bank’s category.
	The Company’s and the Bank’s actual capital amounts and ratios are presented in the table below:
		Actual				Required				Required
						For Capital				To Be Well
						Adequacy Purposes				Capitalized under
										Prompt Corrective
										Action Provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
		(Dollars in thousands)
	As of March 31, 2015
	Common equity tier 1 capital (to risk weighted assets):
	Company	$	788,601	12.73	%	$	278,757	4.5	%	N/A		N/A
	Bank	$	817,754	13.21	%	$	278,512	4.5	%	$	402,295	6.5	%
	Total capital (to risk-weighted assets):
	Company	$	900,301	14.53	%	$	495,568	8	%	N/A		N/A
	Bank	$	888,680	14.36	%	$	495,132	8	%	$	618,916	10	%
	Tier I capital (to risk-weighted assets):
	Company	$	829,375	13.39	%	$	371,676	6	%	N/A		N/A
	Bank	$	817,754	13.21	%	$	371,349	6	%	$	495,132	8	%
	Tier I capital (to average assets):
	Company	$	829,375	11.76	%	$	282,116	4	%	N/A		N/A
	Bank	$	817,754	11.6	%	$	281,961	4	%	$	352,451	5	%
		Actual				Required				Required
						For Capital				To Be Well
						Adequacy Purposes				Capitalized under
										Prompt Corrective
										Action Provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
		(Dollars in thousands)
	As of December 31, 2014
	Total capital (to risk-weighted assets):
	Company	$	881,794	14.8	%	$	476,490	8	%	N/A		N/A
	Bank	$	869,343	14.61	%	$	476,101	8	%	$	595,126	10	%
	Tier I capital (to risk-weighted assets):
	Company	$	812,464	13.64	%	$	238,245	4	%	N/A		N/A
	Bank	$	800,013	13.44	%	$	238,050	4	%	$	357,076	6	%
	Tier I capital (to average assets):
	Company	$	812,464	11.62	%	$	279,709	4	%	N/A		N/A
	Bank	$	800,013	11.45	%	$	279,585	4	%	$	349,481	5	%

Basis_of_Presentation_Basis_of

Basis of Presentation Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2015
Basis Of Presentation [Abstract]
Consolidation	The condensed consolidated financial statements include the accounts of BBCN Bancorp and its wholly-owned subsidiaries, principally BBCN Bank. All intercompany transactions and balances have been eliminated in consolidation. The Company has made all adjustments, consisting solely of normal recurring accruals, that in the opinion of management, are necessary to fairly present the Company's financial position at March 31, 2015 and the results of operations for the three months then ended. Certain reclassifications have been made to prior period amounts to conform to the current year presentation. The results of operations for the interim periods are not necessarily indicative of results to be anticipated for the full year.
Use of estimates	The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are susceptible to change in the near term relate to the determination of the allowance and provision for loan losses, the evaluation of other than temporary impairment of investment securities, accounting for derivatives and hedging activities, the determination of the carrying value for cash surrender value of life insurance, the determination of the carrying value of goodwill and other intangible assets, accounting for deferred tax assets and related valuation allowances, the determination of the fair values of investment securities and other financial instruments, accounting for lease arrangements, accounting for incentive compensation, profit sharing and bonus payments, and the valuation of servicing assets.
Recent Accounting Pronouncements	Recent Accounting Pronouncements:
	FASB ASU No. 2014-01, Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects. These amendments permit reporting entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. Disclosures for a change in accounting principle are required upon transition. ASU 2014-01 is effective for interim and annual periods beginning after December 15, 2014. The Company did not elect to use the proportional amortization method in accounting for investments that qualify for low income housing tax credits. The adoption of ASU 2014-01 did not have a significant impact on the Company's financial statements.
	FASB ASU No. 2014-04, Receivables—Troubled Debt Restructuring by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans Upon Foreclosure. The amendment intends to clarify the terms defining when an in substance foreclosure occurs, which determines when the receivable should be derecognized and the real estate property recognized. ASU No. 2014-04 will be effective for interim and annual periods beginning after December 31, 2014. The adoption of ASU No. 2014-04 did not have a material impact on the Company's consolidated financial statements.
	FASB ASU No. 2014-12, Compensation—Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period. The amendments in ASU 2014-12 require that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. The performance target should not be reflected in estimating the grant-date fair value of the award. Compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved and should represent the compensation cost attributable to the period(s) for which the requisite service has already been rendered. If the performance target becomes probable of being achieved before the end of the requisite service period, the remaining unrecognized compensation cost should be recognized prospectively over the remaining requisite service period. The total amount of compensation cost recognized during and after the requisite service period should reflect the number of awards that are expected to vest and should be adjusted to reflect those awards that ultimately vest. The requisite service period ends when the employee can cease rendering service and still be eligible to vest in the award if the performance target is achieved. ASU 2014-12 is effective for interim and annual periods beginning after December 31, 2014 and did not have a significant impact on the Company's financial statements.
	FASB ASU No. 2015-01, Income Statement—Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items. The amendments in ASU 2015-01 eliminates from U.S. GAAP the concept of extraordinary items. Subtopic 225-20, Income Statement - Extraordinary and Unusual Items, required that an entity separately classify, present, and disclose extraordinary events and transactions. ASU 2015-1 is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2015. The adoption of ASU 2015-1 is not expected to have a significant impact on the Company's financial statements.
	FASB ASU No. 2015-05, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. The amendments in ASU 2015-05 provide guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. ASU 2015-05 is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2015. The adoption of ASU 2015-05 is not expected to have a significant impact on the Company's financial statements.
	FASB ASU No. 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). The amendments in ASU 2015-07 remove the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share practical expedient. The amendments also remove the requirement to make certain disclosures for all investments that are eligible to be measured at fair value using the net asset value per share practical expedient. Rather, those disclosures are limited to investments for which the entity has elected to measure the fair value using that practical expedient.The adoption of ASU 2015-07 is not expected to have a significant impact on the Company's financial statements.
Income taxes	Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.
	Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion, or all, of the deferred tax asset will not be realized. In assessing the realization of deferred tax assets, management evaluates both positive and negative evidence, including the existence of any cumulative losses in the current year and the prior two years, the amount of taxes paid in available carry-back years, the forecasts of future income, applicable tax planning strategies, and assessments of current and future economic and business conditions. This analysis is updated quarterly and adjusted as necessary.

Business_Combinations_Tables

Business Combinations (Tables)	3 Months Ended
	Mar. 31, 2015
Business Acquisition [Line Items]
Fair Value of Acquired Loans	The following table presents loans acquired with deteriorated credit quality as of the date of acquisition:
		Foster			PIB
		(In thousands)
	Contractually required principal and interest at acquisition	$	150,430		$	54,462
	Contractual cash flows not expected to be collected (nonaccretable discount)	37,447			9,687
	Expected cash flows at acquisition	112,983			44,775
	Interest component of expected cash flows (accretable discount)	14,928			4,945
	Fair value of acquired impaired loans	$	98,055		$	39,830
Pro Forma Information	The following unaudited combined pro forma information presents the operating results for the three and nine months ended March 31, 2015 and 2014, as if the Foster and PIB acquisitions had occurred on January 1, 2013:
		Three Months Ended March 31,					Three Months Ended March 31,
		2015			2.014		2015		2.014
		(In thousands, except share data)
	Net interest income	$	67,907		$	66,353	$	200,363	$	196,861
	Net income	$	21,420		$	22,960	$	65,928	$	60,084
	Preferred stock dividends and accretion of preferred stock discount	—			—		—		—
	Net income (loss) available to common stockholders	$	—		$	—	$	—	$	—
	Pro forma earnings per share:
	Basic	$	0.27		$	0.29	$	0.83	$	0.76
	Diluted	$	0.27		$	0.29	$	0.83	$	0.75
Foster Bankshares Inc
Business Acquisition [Line Items]
Consideration Paid, Assets Acquired and Liabilities Assumed	The consideration paid, the assets acquired, and the liabilities assumed are summarized in the following table:
		(In thousands)
	Consideration paid:
	BBCN common stock issued in exchange for Foster common stock	$	2,609
	Cash paid for the redemption of Foster common stock	2,042
	Liability for unredeemed Foster common stock	116
	Total consideration paid	$	4,767
	Assets Acquired:
	Cash and cash equivalents	$	42,883
	Investment securities available for sale	4,844
	Loans receivable	255,297
	FRB and FHLB stock	1,714
	OREO	14,251
	Premises and equipment	4,733
	Core deposit intangibles	2,763
	Deferred tax assets, net	21,211
	Other assets	2,353
	Liabilities Assumed:
	Deposits	(321,596		)
	Borrowings	(18,045		)
	Subordinated debentures	(15,309		)
	Other liabilities	(5,857		)
	Total identifiable net assets	$	(10,758	)
	Excess of consideration paid over fair value of net assets acquired (goodwill)	$	15,525
Pacific International Bancorp, Inc.
Business Acquisition [Line Items]
Consideration Paid, Assets Acquired and Liabilities Assumed	In connection with the acquisition, the consideration paid, the assets acquired, and the liabilities assumed are summarized in the following table:
		(In thousands)
	Consideration paid:
	BBCN common stock issued	$	8,437
	Cash in lieu of fractional shares paid to PIB stockholders	1
	Redemption of Preferred Stock	7,475
	Total consideration paid	$	15,913
	Assets Acquired:
	Cash and cash equivalents	$	25,968
	Investment securities available for sale	7,810
	Loans receivable	131,589
	FRB and FHLB stock	1,829
	OREO	3,418
	Deferred tax assets, net	9,886
	Core deposit intangibles	604
	Other assets	2,514
	Liabilities Assumed:
	Deposits	(143,665		)
	Borrowings	(14,698		)
	Subordinated debentures	(4,108		)
	Other liabilities	(5,116		)
	Total identifiable net assets	$	16,031
	Bargain purchase gain	$	118

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Option Activity Under the Plan	The following is a summary of stock option activity under the 2007 Plan and 2006 Plan for the three months ended March 31, 2015:
		Number of		Weighted-		Weighted-	Aggregate
		Shares		Average		Average	Intrinsic
				Exercise		Remaining	Value
				Price Per		Contractual
				Share		Life (Years)
	Outstanding - January 1, 2015	591,652		$	19
	Granted	—		—
	Exercised	—		—
	Expired	—		—
	Forfeited	—		—
	Outstanding - March 31, 2015	591,652		$	19	1.73	$	—
	Options exercisable - March 31, 2015	381,652		$	20.7	1.73	$	—
Summary of Restricted and Performance Unit Activity Under the Plan	The following is a summary of restricted and performance unit activity under the 2007 Plan and 2006 Plan for the three months ended March 31, 2015:
		Number of		Weighted-
		Shares		Average Grant Date
				Fair Value
	Outstanding - January 1, 2015	175,668		$	13.52
	Granted	5,000		13.69
	Vested	(42,883	)	11.68
	Forfeited	—		—
	Outstanding - March 31, 2015	137,785		$	14.1

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Computation of basic and diluted EPS	The following tables show the computation of basic and diluted EPS for the three months ended March 31, 2015 and 2014.
		Three Months Ended March 31,
		2015					2014
		Net income		Weighted-Average Shares	Per		Net income		Weighted-Average Shares	Per
		(Numerator)		(Denominator)	Share		(Numerator)		(Denominator)	Share
					(Amount)					(Amount)
		(In thousands, except share and per share data)
	Basic EPS - common stock	$	21,358	79,526,218	$	0.27	$	22,196	79,489,579	$	0.28
	Effect of dilutive securities:
	Stock options and performance units			27,359					58,591
	Common stock warrants			48,545					91,669
	Diluted EPS - common stock	$	21,358	79,602,122	$	0.27	$	22,196	79,639,839	$	0.28

Securities_Available_for_Sale_

Securities Available for Sale (Tables)	3 Months Ended
	Mar. 31, 2015
Available-for-sale Securities [Abstract]
Summary of Securities Available for Sale	The following is a summary of securities available for sale as of the dates indicated:
		At March 31, 2015
		Amortized			Gross			Gross				Estimated
		Cost			Unrealized			Unrealized				Fair Value
					Gains			Losses
		(In thousands)
	Debt securities:
	U.S. Government agency and U.S. Government sponsored enterprises
	Collateralized mortgage obligations	$	328,066		$	2,650		$	(1,413	)		$	329,303
	Mortgage-backed securities	441,097			7,178			(962		)		447,313
	Trust preferred securities	4,535			—			(579		)		3,956
	Municipal bonds	13,782			558			(7		)		14,333
	Total debt securities	787,480			10,386			(2,961		)		794,905
	Mutual funds	17,425			42			—				17,467
		$	804,905		$	10,428		$	(2,961	)		$	812,372
		At December 31, 2014
		Amortized			Gross			Gross				Estimated
		Cost			Unrealized			Unrealized				Fair Value
					Gains			Losses
		(In thousands)
	Debt securities:
	U.S. Government agency and U.S. Government sponsored enterprises
	Collateralized mortgage obligations	$	304,947		$	1,376		$	(3,549	)		$	302,774
	Mortgage-backed securities	460,487			6,528			(1,526		)		465,489
	Trust preferred securities	4,531			—			(544		)		3,987
	Municipal bonds	6,487			443			—				6,930
	Total debt securities	776,452			8,347			(5,619		)		779,180
	Mutual funds	17,425			—			(82		)		17,343
		$	793,877		$	8,347		$	(5,701	)		$	796,523
Schedule of Realized Gain (Loss)	The proceeds from sales of securities and the associated gross gains and losses recorded in earnings are listed below:
		Three Months Ended March 31,
		2015			2014
		(In thousands)
	Proceeds	$	22,510		$	—
	Gross gains	424			—
	Gross losses	—			—
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of debt securities at March 31, 2015, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately.
		Amortized			Estimated
		Cost			Fair Value
		(In thousands)
	Available for sale:
	Due within one year	$	340		$	343
	Due after one year through five years	754			839
	Due after five years through ten years	9,207			9,605
	Due after ten years	8,016			7,502
	U.S. Government agency and U.S. Government sponsored enterprises
	Collateralized mortgage obligations	328,066			329,303
	Mortgage-backed securities	441,097			447,313
	Mutual funds	17,425			17,467
		$	804,905		$	812,372
Schedule of Unrealized Loss on Investments	The following table shows our investments’ gross unrealized losses and estimated fair value, aggregated by investment category and the length of time that the individual securities have been in a continuous unrealized loss position as of the dates indicated.
		As of March 31, 2015
		Less than 12 months									12 months or longer								Total
	Description of	Number of		Fair Value			Gross				Number of			Fair Value		Gross			Number of	Fair Value		Gross
	Securities	Securities					Unrealized				Securities					Unrealized			Securities			Unrealized
							Losses									Losses						Losses
		(In thousands)
	Collateralized mortgage obligations*	4		$	23,794		$	(66	)		9			$	89,356	$	(1,347	)	13	$	113,150	$	(1,413	)
	Mortgage-backed securities*	6		48,076			(168		)		3			30,672		(794		)	9	78,748		(962		)
	Trust preferred securities	—		—			—				1			3,956		(579		)	1	3,956		(579		)
	Municipal bonds	2		1,399			(7		)		—			—		—			2	1,399		(7		)
	Mutual funds	—		—			—				—			—		—			—	—		—
		12		$	73,269		$	(241	)		13			$	123,984	$	(2,720	)	25	$	197,253	$	(2,961	)
	* Investments in U.S. Government agency and U.S. Government sponsored enterprises
		As of December 31, 2014
		Less than 12 months									12 months or longer								Total
	Description of	Number of		Fair Value			Gross				Number of			Fair Value		Gross			Number of	Fair Value		Gross
	Securities	Securities					Unrealized				Securities					Unrealized			Securities			Unrealized
							Losses									Losses						Losses
		(In thousands)
	Collateralized mortgage obligations*	7		$	71,189		$	(507	)		13			$	133,563	$	(3,042	)	20	$	204,752	$	(3,549	)
	Mortgage-backed securities*	7		38,133			(139		)		6			62,036		(1,387		)	13	100,169		(1,526		)
	Trust Preferred securities	—		—			—				1			3,988		(544		)	1	3,988		(544		)
	Municipal bonds	—		—			—				—			—		—			—	—		—
	Mutual funds	—		—			—				1			13,343		(82		)	1	13,343		(82		)
		14		$	109,322		$	(646	)		21			$	212,930	$	(5,055	)	35	$	322,252	$	(5,701	)
	* Investments in U.S. Government agency and U.S. Government sponsored enterprises

Loans_Receivable_and_Allowance1

Loans Receivable and Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Summary of Loans Receivable by Major Category	The following is a summary of loans receivable by major category:
		March 31, 2015				December 31, 2014
		(In thousands)
	Loan portfolio composition
	Real estate loans:
	Residential	$	23,092			$	21,415
	Commercial & industrial	4,423,331				4,324,349
	Construction	107,705				94,086
	Total real estate loans	4,554,128				4,439,850
	Commercial business	949,701				903,621
	Trade finance	122,560				134,762
	Consumer and other	87,558				89,849
	Total loans outstanding	5,713,947				5,568,082
	Less: deferred loan fees	(3,308		)		(2,890		)
	Loans receivable	5,710,639				5,565,192
	Less: allowance for loan losses	(69,594		)		(67,758		)
	Loans receivable, net of allowance for loan losses	$	5,641,045			$	5,497,434
Loans and Leases Acquired, Accretable Yield Movement Schedule	The following table presents changes in the accretable discount on the ACILs for the three months ended March 31, 2015 and 2014:
		Three Months Ended March 31,
		2015				2014
		(In thousands)
	Balance at beginning of period	$	24,051			$	47,398
	Accretion	(1,555		)		(4,867		)
	Changes in expected cash flows	149				(9,948		)
	Balance at end of period	$	22,645			$	32,583
Allowance for Loan Losses by Portfolio Segment	The following tables detail the activity in the allowance for loan losses by portfolio segment for the three months ended March 31, 2015 and 2014:
		Legacy																Acquired													Total
		Real Estate				Commercial Business				Trade Finance				Consumer and Other				Real Estate				Commercial Business			Trade Finance			Consumer and Other
		(In thousands)
	Three Months Ended March 31, 2015
	Balance, beginning of period	$	38,775			$	15,986			$	3,456			$	427			$	8,573			$	485		$	—		$	56		$	67,758
	Provision (credit) for loan losses	(3,621		)		(22		)		(186		)		(1		)		5,310				23			—			(3		)	1,500
	Loans charged off	(182		)		(451		)		(229		)		(13		)		(159		)		(87		)	—			(4		)	(1,125		)
	Recoveries of charge offs	800				655				—				3				—				1			—			2			1,461
	Balance, end of period	$	35,772			$	16,168			$	3,041			$	416			$	13,724			$	422		$	—		$	51		$	69,594
		Legacy																Acquired													Total
		Real Estate				Commercial Business				Trade Finance				Consumer and Other				Real Estate				Commercial Business			Trade Finance			Consumer and Other
		(In thousands)
	Three Months Ended March 31, 2014
	Balance, beginning of period	$	40,068			$	16,796			$	2,653			$	461			$	6,482			$	796		$	—		$	64		$	67,320
	Provision (credit) for loan losses	(1,414		)		2,547				348				7				451				1,011			—			76			3,026
	Loans charged off	(87		)		(3,725		)		(57		)		(1		)		(95		)		(1,220		)	—			(78		)	(5,263		)
	Recoveries of charge offs	19				590				—				—				—				6			—			1			616
	Balance, end of period	$	38,586			$	16,208			$	2,944			$	467			$	6,838			$	593		$	—		$	63		$	65,699
	The following tables disaggregate the allowance for loan losses and the loans outstanding by impairment methodology at March 31, 2015 and December 31, 2014:
		March 31, 2015
		Legacy																Acquired													Total
		Real Estate				Commercial Business				Trade Finance				Consumer and Other				Real Estate				Commercial Business			Trade Finance			Consumer and Other
		(In thousands)
	Allowance for loan losses:
	Individually evaluated for impairment	$	1,882			$	5,921			$	1,393			$	—			$	417			$	286		$	—		$	—		$	9,899
	Collectively evaluated for impairment	33,890				10,247				1,648				416				660				136			—			51			47,048
	ACILs	—				—				—				—				12,647				—			—			—			12,647
	Total	$	35,772			$	16,168			$	3,041			$	416			$	13,724			$	422		$	—		$	51		$	69,594
	Loans outstanding:
	Individually evaluated for impairment	$	55,345			$	39,331			$	6,357			$	470			$	18,894			$	1,689		$	—		$	651		$	122,737
	Collectively evaluated for impairment	4,029,737				842,903				116,203				37,886				354,580				36,771			—			24,619			5,442,699
	ACILs	—				—				—				—				95,572				29,007			—			23,932			148,511
	Total	$	4,085,082			$	882,234			$	122,560			$	38,356			$	469,046			$	67,467		$	—		$	49,202		$	5,713,947
		December 31, 2014
		Legacy																Acquired													Total
		Real Estate				Commercial Business				Trade Finance				Consumer and Other				Real Estate				Commercial Business			Trade Finance			Consumer and Other
		(In thousands)
	Allowance for loan losses:
	Individually evaluated for impairment	$	1,940			$	6,929			$	1,312			$	—			$	434			$	307		$	—		$	—		$	10,922
	Collectively evaluated for impairment	36,835				9,057				2,144				427				792				178			—			56			49,489
	ACILs	—				—				—				—				7,347				—			—			—			7,347
	Total	$	38,775			$	15,986			$	3,456			$	427			$	8,573			$	485		$	—		$	56		$	67,758
	Loans outstanding:
	Individually evaluated for impairment	$	57,506			$	40,829			$	5,936			$	465			$	20,035			$	1,778		$	—		$	596		$	127,145
	Collectively evaluated for impairment	3,864,289				784,407				128,826				37,312				397,147				43,460			—			25,859			5,281,300
	ACILs	—				—				—				—				100,873				33,147			—			25,617			159,637
	Total	$	3,921,795			$	825,236			$	134,762			$	37,777			$	518,055			$	78,385		$	—		$	52,072		$	5,568,082
Impaired Financing Receivables	The recorded investment in individually impaired loans was as follows:
		March 31, 2015				December 31, 2014
		(In thousands)
	With allocated allowance
	Without charge off	$	65,201			$	67,352
	With charge off	1,808				6,582
	With no allocated allowance
	Without charge off	49,330				46,885
	With charge off	6,398				6,326
	Allowance on impaired loans	(9,899		)		(10,922		)
	Impaired loans, net of allowance	$	112,838			$	116,223
	The following tables detail impaired loans (Legacy and APLs that became impaired subsequent to being acquired) as of March 31, 2015 and December 31, 2014 and for the three months ended March 31, 2015 and 2014 and for the year ended December 31, 2014. Loans with no related allowance for loan losses are believed by management to have adequate collateral securing their carrying value.
			As of March 31, 2015												For the Three Months Ended March 31, 2015
	Total Impaired Loans		Recorded Investment*				Unpaid Contractual Principal Balance				Related				Average Recorded Investment*				Interest Income Recognized during Impairment
											Allowance
			(In thousands)
	With related allowance:
	Real estate—residential		$	—			$	—			$	—			$	—			$	—
	Real estate—commercial
	Retail		3,911				3,994				127				4,406				44
	Hotel & motel		11,585				12,413				393				12,493				129
	Gas station & car wash		813				965				343				1,359				—
	Mixed use		481				497				10				481				—
	Industrial & warehouse		6,921				6,935				31				4,516				76
	Other		7,909				8,267				1,395				8,845				88
	Real estate—construction		—				—				—				—				—
	Commercial business		30,411				30,785				6,207				33,856				287
	Trade finance		4,964				8,310				1,393				4,509				35
	Consumer and other		14				16				—				7				—
			$	67,009			$	72,182			$	9,899			$	70,472			$	659
	With no related allowance:
	Real estate—residential		$	—			$	—			$	—			$	—			$	—
	Real estate—commercial
	Retail		9,875				11,786				—				10,792				87
	Hotel & motel		5,851				7,835				—				5,922				—
	Gas station & car wash		3,797				6,358				—				3,245				25
	Mixed use		1,998				2,305				—				1,793				9
	Industrial & warehouse		9,460				11,189				—				11,917				77
	Other		10,158				13,459				—				8,620				38
	Real estate—construction		1,480				1,525				—				1,500				—
	Commercial business		10,609				12,944				—				7,958				79
	Trade finance		1,393				8,650				—				1,638				—
	Consumer and other		1,107				1,182				—				1,084				7
			$	55,728			$	77,233			$	—			$	54,469			$	322
	Total		$	122,737			$	149,415			$	9,899			$	124,941			$	981
	*	Unpaid contractual principal balance less charge offs, interest applied to principal and purchase discounts.
			For the Three Months Ended March 31, 2014
	Total Impaired Loans		Average Recorded Investment*				Interest Income Recognized during Impairment
			(In thousands)
	With related allowance:
	Real estate—residential		$	—			$	—
	Real estate—commercial
	Retail		5,826				23
	Hotel & motel		11,831				133
	Gas station & car wash		3,112				19
	Mixed use		931				10
	Industrial & warehouse		10,188				75
	Other		10,137				94
	Real estate—construction		—				—
	Commercial business		31,269				297
	Trade finance		5,490				49
	Consumer and other		268				—
			$	79,052			$	700
	With no related allowance:
Real estate—residential		$	—			$	—
Real estate—commercial
Retail		6,134				58
Hotel & motel		6,501				—
Gas station & car wash		4,750				—
Mixed use		1,071				—
Industrial & warehouse		6,625				3
Other		2,844				16
Real estate—construction		1,615				21
Commercial business		8,854				61
Trade finance		488				—
Consumer and other		1,123				8
		$	40,005			$	167
Total		$	119,057			$	867
*	Unpaid contractual principal balance less charge offs, interest applied to principal and purchase discounts.
		As of March 31, 2015												For the Three Months Ended March 31, 2015
Impaired APLs		Recorded Investment*				Unpaid				Related				Average Recorded Investment*				Interest Income Recognized during Impairment
						Contractual Principal				Allowance
						Balance
		(In thousands)
With related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		2,602				2,588				66				2,128				37
Hotel & motel														—				—
Gas station & car wash		712				864				339				1,237				—
Mixed use		352				348				2				352				—
Industrial & warehouse		359				359				5				180				5
Other		317				317				6				1,040				4
Real estate—construction														—				—
Commercial business		657				831				286				713				1
Trade finance														—				—
Consumer and other		2				3				—				1				—
		$	5,001			$	5,310			$	704			$	5,651			$	47
With no related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		1,583				1,793				—				2,370				6
Hotel & motel		5,519				7,484				—				5,555				—
Gas station & car wash		1,032				1,079				—				521				15
Mixed use		223				372				—				111				—
Industrial & warehouse		1,224				1,381				—				1,481				1
Other		4,972				6,443				—				4,490				10
Real estate—construction		—				—				—				—				—
Commercial business		1,033				1,771				—				1,021				3
Trade finance		—				—				—				—				—
Consumer and other		649				723				—				622				2
		$	16,235			$	21,046			$	—			$	16,171			$	37
Total		$	21,236			$	26,356			$	704			$	21,822			$	84
*	Unpaid contractual principal balance less charge offs, interest applied to principal and purchase discounts.
		For the Three Months Ended March 31, 2014
Impaired APLs		Average Recorded Investment*				Interest Income Recognized during Impairment
		(In thousands)
With related allowance:
Real estate—residential		$	—			$	—
Real estate—commercial
Retail		248				1
Hotel & motel		—				—
Gas station & car wash		1,786				15
Mixed use		—				—
Industrial & warehouse		2,564				—
Other		1,387				2
Real estate—construction		—				—
Commercial business		1,468				5
Trade finance		—				—
Consumer and other		—				—
		$	7,453			$	23
With no related allowance:
Real estate—residential		$	—			$	—
Real estate—commercial
Retail		1,539				7
Hotel & motel		6,410				—
Gas station & car wash		1,076				—
Mixed use		233				—
Industrial & warehouse		4,213				3
Other		2,179				8
Real estate—construction		—				—
Commercial business		1,215				—
Trade finance		—				—
Consumer and other		860				2
		$	17,725			$	20
Total		$	25,178			$	43
*	Unpaid contractual principal balance less charge offs, interest applied to principal and purchase discounts.
		As of December 31, 2014												For the Year Ended
														31-Dec-14
Total Impaired Loans		Recorded Investment*				Unpaid				Related				Average				Interest Income Recognized during Impairment
						Contractual Principal				Allowance				Recorded Investment*
						Balance
		(In thousands)
With related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		4,902				5,288				390				5,205				127
Hotel & motel		13,401				14,548				469				12,053				532
Gas station & car wash		1,904				3,507				379				2,440				60
Mixed use		482				497				13				823				—
Industrial & warehouse		2,111				2,126				13				7,309				119
Other		9,781				10,389				1,110				9,709				355
Real estate—construction		—				—				—				—				—
Commercial business		37,300				38,730				7,236				32,798				1,502
Trade finance		4,053				11,310				1,312				6,647				—
Consumer and other		—				—				—				114				—
		$	73,934			$	86,395			$	10,922			$	77,098			$	2,695
With no related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		11,708				13,492				—				8,462				358
Hotel & motel		5,992				8,728				—				6,655				—
Gas station & car wash		2,693				4,065				—				4,139				44
Mixed use		1,589				1,697				—				1,415				39
Industrial & warehouse		14,374				17,940				—				9,311				494
Other		7,083				9,886				—				5,118				93
Real estate—construction		1,521				1,545				—				1,583				—
Commercial business		5,307				6,880				—				8,349				50
Trade finance		1,883				5,000				—				724				—
Consumer and other		1,061				1,118				—				1,168				28
		$	53,211			$	70,351			$	—			$	46,924			$	1,106
Total		$	127,145			$	156,746			$	10,922			$	124,022			$	3,801
*	Unpaid contractual principal balance less charge offs, interest applied to principal and purchase discounts.
		As of December 31, 2014												For the Year Ended
														31-Dec-14
Impaired APLs		Recorded Investment*				Unpaid Contractual Principal Balance				Related Allowance				Average Recorded Investment*				Interest Income Recognized during Impairment
		(In thousands)
With related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		1,653				1,638				36				838				97
Hotel & motel		—				—				—				—				—
Gas station & car wash		1,762				1,953				379				1,783				60
Mixed use		352				348				2				212				—
Industrial & warehouse		—				—				—				1,026				—
Other		1,763				2,016				17				1,134				5
Real estate—construction		—				—				—				—				—
Commercial business		769				928				307				1,090				15
Trade finance		—				—				—				—				—
Consumer and other		—				—				—				—				—
		$	6,299			$	6,883			$	741			$	6,083			$	177
With no related allowance:
Real estate—residential		$	—			$	—			$	—			$	—			$	—
Real estate—commercial
Retail		3,158				3,376				—				1,869				27
Hotel & motel		5,591				7,493				—				6,067				—
Gas station & car wash		9				297				—				621				—
Mixed use		—				—				—				275				—
Industrial & warehouse		1,737				1,954				—				2,673				39
Other		4,009				5,174				—				3,798				41
Real estate—construction		—				—				—				—				—
Commercial business		1,009				1,758				—				1,321				4
Trade finance		—				—				—				—				—
Consumer and other		596				652				—				772				8
		$	16,109			$	20,704			$	—			$	17,396			$	119
Total		$	22,408			$	27,587			$	741			$	23,479			$	296
*	Unpaid contractual principal balance less charge offs, interest applied to principal and purchase discounts.
Aging of Past Due Loans	The following tables present the aging of past due loans as of March 31, 2015 and December 31, 2014 by class of loans:
		As of March 31, 2015
		Past Due and Accruing
		30-59 Days Past Due				60-89 Days Past Due				90 or More Days Past Due				Total				Nonaccrual Loans (2)				Total Delinquent Loans
		(In thousands)
	Legacy Loans:
	Real estate—residential	$	—			$	—			$	—			$	—			$	—			$	—
	Real estate—commercial
	Retail	—				273				—				273				2,441				2,714
	Hotel & motel	183				584				—				767				548				1,315
	Gas station & car wash	329				241				—				570				2,151				2,721
	Mixed use	436				—				—				436				1,120				1,556
	Industrial & warehouse	—				—				—				—				1,251				1,251
	Other	—				81				—				81				2,988				3,069
	Real estate—construction	—				—				—				—				1,480				1,480
	Commercial business	3,596				386				—				3,982				8,174				12,156
	Trade finance	100				—				—				100				3,047				3,147
	Consumer and other	257				—				—				257				12				269
	Subtotal	$	4,901			$	1,565			$	—			$	6,466			$	23,212			$	29,678
	Acquired Loans: (1)
	Real estate—residential	$	—			$	—			$	—			$	—			$	—			$	—
	Real estate—commercial
	Retail	—				—				—				—				1,339				1,339
	Hotel & motel	—				—				—				—				5,519				5,519
	Gas station & car wash	1,032				—				—				1,032				712				1,744
	Mixed use	113				—				—				113				574				687
	Industrial & warehouse	—				—				—				—				1,151				1,151
	Other	—				—				—				—				3,852				3,852
	Real estate—construction	—				—				—				—				—				—
	Commercial business	133				66				—				199				1,370				1,569
	Trade finance	—				—				—				—				—				—
	Consumer and other	16				—				—				16				1,026				1,042
	Subtotal	$	1,294			$	66			$	—			$	1,360			$	15,543			$	16,903
	TOTAL	$	6,195			$	1,631			$	—			$	7,826			$	38,755			$	46,581
	(1)	The Acquired Loans exclude ACILs.
	(2)	Nonaccrual loans exclude the guaranteed portion of delinquent SBA loans that are in liquidation totaling $26.1 million.
		As of December 31, 2014
		Past Due and Accruing
		30-59 Days Past Due				60-89 Days Past Due				90 or More Days Past Due				Total				Nonaccrual Loans (2)				Total Delinquent Loans
		(In Thousands)
	Legacy Loans:
	Real estate—residential	$	—			$	—			$	—			$	—			$	—			$	—
	Real estate—commercial
	Retail	201				351				—				552				4,586				5,138
	Hotel & motel	299				—				—				299				2,336				2,635
	Gas station & car wash	—				—				—				—				2,105				2,105
	Mixed use	437				—				—				437				930				1,367
	Industrial & warehouse	—				208				—				208				2,335				2,543
	Other	455				524				—				979				2,150				3,129
	Real estate—construction	—				—				—				—				1,521				1,521
	Commercial business	655				729				—				1,384				9,640				11,024
	Trade finance	—				—				—				—				3,194				3,194
	Consumer and other	36				—				—				36				18				54
	Subtotal	$	2,083			$	1,812			$	—			$	3,895			$	28,815			$	32,710
	Acquired Loans: (1)
	Real estate—residential	$	—			$	—			$	—			$	—			$	—			$	—
	Real estate—commercial
	Retail	1,402				—				—				1,402				2,792				4,194
	Hotel & motel	—				—				—				—				5,591				5,591
	Gas station & car wash	—				—				—				—				736				736
	Mixed use	345				—				—				345				352				697
	Industrial & warehouse	—				—				361				361				1,185				1,546
	Other	—				—				—				—				4,370				4,370
	Real estate—construction	—				—				—				—				—				—
Commercial business	36				347				—				383				1,468				1,851
Trade finance	—				—				—				—				—				—
Consumer and other	23				90				—				113				1,044				1,157
Subtotal	$	1,806			$	437			$	361			$	2,604			$	17,538			$	20,142
TOTAL	$	3,889			$	2,249			$	361			$	6,499			$	46,353			$	52,852
(1)	The Acquired Loans exclude ACILs.
(2) Nonaccrual loans exclude guaranteed portion of delinquent SBA loans that are in liquidation totaling $28.9 million.
Risk Category of Loans by Class of Loans	The following tables present the risk rating for Legacy Loans and Acquired Loans as of March 31, 2015 and December 31, 2014 by class of loans:
		As of March 31, 2015
		Pass				Special				Substandard				Doubtful/Loss				Total
						Mention
		(In thousands)
	Legacy Loans:
	Real estate—residential	$	22,366			$	—			$	—			$	—			$	22,366
	Real estate—commercial
	Retail	998,800				19,594				13,262				—				1,031,656
	Hotel & motel	817,621				114				5,900				—				823,635
	Gas station & car wash	560,789				14,153				8,837				—				583,779
	Mixed use	301,984				792				1,576				—				304,352
	Industrial & warehouse	398,807				5,571				12,199				—				416,577
	Other	754,685				25,572				14,755				—				795,012
	Real estate—construction	106,225								1,480				—				107,705
	Commercial business	823,050				18,996				39,972				216				882,234
	Trade finance	104,595				5,242				12,723				—				122,560
	Consumer and other	37,879				7				458				12				38,356
	Subtotal	$	4,926,801			$	90,041			$	111,162			$	228			$	5,128,232
	Acquired Loans:
	Real estate—residential	$	438			$	288			$	—			$	—			$	726
	Real estate—commercial
	Retail	150,030				3,699				22,038				—				175,767
	Hotel & motel	54,108				3,834				9,037				—				66,979
	Gas station & car wash	27,352				391				7,801				—				35,544
	Mixed use	25,647				6,945				3,006				—				35,598
	Industrial & warehouse	56,360				1,536				12,182				—				70,078
	Other	69,129				549				14,640				36				84,354
	Real estate—construction	—				—				—				—				—
	Commercial business	43,488				3,319				19,481				1,179				67,467
	Trade finance	—				—				—				—				—
	Consumer and other	38,304				1,696				8,470				732				49,202
	Subtotal	$	464,856			$	22,257			$	96,655			$	1,947			$	585,715
	Total	$	5,391,657			$	112,298			$	207,817			$	2,175			$	5,713,947
		As of December 31, 2014
		Pass				Special				Substandard				Doubtful/Loss				Total
						Mention
		(In thousands)
	Legacy Loans:
	Real estate—residential	$	20,586			$	—			$	—			$	—			$	20,586
	Real estate—commercial
	Retail	1,015,195				20,177				14,805				—				1,050,177
	Hotel & motel	784,586				114				7,746				—				792,446
	Gas station & car wash	553,901				—				8,857				—				562,758
	Mixed use	288,409				1,147				2,187				—				291,743
	Industrial & warehouse	347,805				9,181				12,313				—				369,299
	Other	699,644				28,044				13,013				—				740,701
	Real estate—construction	92,564				—				1,521				—				94,085
	Commercial business	765,280				18,792				41,138				26				825,236
	Trade finance	103,844				18,599				12,319				—				134,762
	Consumer and other	37,256				38				470				13				37,777
	Subtotal	$	4,709,070			$	96,092			$	114,369			$	39			$	4,919,570
	Acquired Loans:
	Real estate—residential	$	539			$	290			$	—			$	—			$	829
	Real estate—commercial
	Retail	157,485				3,531				25,469				—				186,485
	Hotel & motel	69,236				3,889				9,241				—				82,366
	Gas station & car wash	27,936				369				8,542				268				37,115
	Mixed use	25,843				7,001				3,048				—				35,892
	Industrial & warehouse	66,214				667				14,177				—				81,058
	Other	76,956				2,076				15,242				36				94,310
	Real estate—construction	—				—				—				—				—
	Commercial business	48,270				6,331				22,721				1,063				78,385
	Trade finance	—				—				—				—				—
Consumer and other	40,136				2,089				9,066				781				52,072
Subtotal	$	512,615			$	26,243			$	107,506			$	2,148			$	648,512
Total	$	5,221,685			$	122,335			$	221,875			$	2,187			$	5,568,082
Loans Sold From Loans Held For Investment
		Three Months Ended March 31,
		2015				2014
	Reclassification to held for sale	(In thousands)
	Real estate - Commercial	$	384			$	—
	Commercial Business	66				—
	Total	$	450			$	—
Allowance for Loan Losses and Impaired Loans, Qualitative and Quantitative Analysis	The following table presents loans by portfolio segment and impairment method at March 31, 2015 and December 31, 2014:
		As of March 31, 2015
		Real Estate—				Real Estate—				Real Estate—				Commercial				Trade				Consumer			Total
		Residential				Commercial				Construction				Business				Finance				and Other
		(In thousands)
	Impaired loans (gross carrying value)	$	—			$	72,759			$	1,480			$	41,020			$	6,357			$	1,121		$	122,737
	Specific allowance	$	—			$	2,299			$	—			$	6,207			$	1,393			$	—		$	9,899
	Loss coverage ratio	0		%		3.2		%		0		%		15.1		%		21.9		%		0		%	8.1		%
	Non-impaired loans	$	23,092			$	4,350,572			$	106,225			$	908,681			$	116,203			$	86,437		$	5,591,210
	General allowance	$	146			$	46,295			$	756			$	10,383			$	1,648			$	467		$	59,695
	Loss coverage ratio	0.6		%		1.1		%		0.7		%		1.1		%		1.4		%		0.5		%	1.1		%
	Total loans	$	23,092			$	4,423,331			$	107,705			$	949,701			$	122,560			$	87,558		$	5,713,947
	Total allowance for loan losses	$	146			$	48,594			$	756			$	16,590			$	3,041			$	467		$	69,594
	Loss coverage ratio	0.6		%		1.1		%		0.7		%		1.7		%		2.5		%		0.5		%	1.2		%
		As of December 31, 2014
		Real Estate—				Real Estate—				Real Estate—				Commercial				Trade				Consumer			Total
		Residential				Commercial				Construction				Business				Finance				and Other
		(In thousands)
	Impaired loans (gross carrying value)	$	—			$	76,020			$	1,521			$	42,607			$	5,936			$	1,061		$	127,145
	Specific allowance	$	—			$	2,374			$	—			$	7,236			$	1,312			$	—		$	10,922
	Loss coverage ratio	N/A				3.1		%		0		%		17		%		22.1		%		0		%	8.6		%
	Non-impaired loans	$	21,415			$	4,248,329			$	92,565			$	861,014			$	128,826			$	88,788		$	5,440,937
	General allowance	$	146			$	44,161			$	667			$	9,235			$	2,144			$	483		$	56,836
	Loss coverage ratio	0.7		%		1		%		0.7		%		1.1		%		1.7		%		0.5		%	1		%
	Total loans	$	21,415			$	4,324,349			$	94,086			$	903,621			$	134,762			$	89,849		$	5,568,082
	Total allowance for loan losses	$	146			$	46,535			$	667			$	16,471			$	3,456			$	483		$	67,758
	Loss coverage ratio	0.7		%		1.1		%		0.7		%		1.8		%		2.6		%		0.5		%	1.2		%
Troubled Debt Restructurings	A summary of TDRs on accrual and nonaccrual status by type of concession as of March 31, 2015 and December 31, 2014 is presented below:
		As of March 31, 2015
		TDRs on Accrual																TDRs on Nonaccrual													Total
		Real Estate—				Commercial				Other				Total				Real Estate—				Commercial			Other			Total
		Commercial				Business												Commercial				Business
		(In thousands)
	Payment concession	$	12,137			$	511			$	—			$	12,648			$	3,886			$	479		$	—		$	4,365		$	17,013
	Maturity / Amortization concession	3,952				18,887				3,943				26,782				1,039				2,035			1,629			4,703			31,485
	Rate concession	13,563				4,911				—				18,474				7,762				42			174			7,978			26,452
	Principal forgiveness	—				—				—				—				—				14			—			14			14
		$	29,652			$	24,309			$	3,943			$	57,904			$	12,687			$	2,570		$	1,803		$	17,060		$	74,964
		As of December 31, 2014
		TDRs on Accrual																TDRs on Nonaccrual													Total
		Real Estate—				Commercial				Other				Total				Real Estate—				Commercial			Other			Total
		Commercial				Business												Commercial				Business
		(In thousands)
	Payment concession	$	12,235			$	556			$	—			$	12,791			$	3,840			$	517		$	—		$	4,357		$	17,148
	Maturity / Amortization concession	2,189				20,053				3,387				25,629				1,207				3,158			1,550			5,915			31,544
	Rate concession	13,684				5,024				—				18,708				8,473				80			176			8,729			27,437
	Principal forgiveness	—				—				—				—				—				15			—			15			15
		$	28,108			$	25,633			$	3,387			$	57,128			$	13,520			$	3,770		$	1,726		$	19,016		$	76,144
	The following table presents loans by class modified as TDRs that occurred during the three months ended March 31, 2015 and 2014:
		Three Months Ended March 31, 2015											Three Months Ended March 31, 2014
		Number of			Pre-				Post-				Number of			Pre-				Post-
		Loans			Modification				Modification				Loans			Modification				Modification
		(Dollars in thousands)
	Legacy Loans:
	Real estate—commercial
	Retail	—			$	—			$	—			—			$	—			$	—
	Hotel & motel	—			—				—				—			—				—
	Gas station & car wash	1			142				137				—			—				—
	Mixed use	—			—				—				—			—				—
	Industrial & warehouse	—			—				—				—			—				—
	Other	2			1,762				1,765				1			1,023				1,018
	Real estate - construction	—			—				—				—			—				—
	Commercial business	2			91				46				2			296				121
	Trade finance	—			—				—				—			—				—
	Consumer and other	—			—				—				1			195				192
	Subtotal	5			$	1,995			$	1,948			4			$	1,514			$	1,331
	Acquired Loans:
	Real estate—commercial
	Retail	—			$	—			$	—			2			$	1,075			$	1,062
	Hotel & motel	—			—				—				—			—				—
	Gas station & car wash	—			—				—				1			794				756
	Mixed use	—			—				—				—			—				—
	Industrial & warehouse	1			361				359				1			75				74
	Other	—			—				—				1			1,023				1,001
	Real estate—construction	—			—				—				—			—				—
	Commercial business	—			—				—				7			457				215
	Trade finance	—			—				—				—			—				—
	Consumer and other	—			—				—				1			195				187
	Subtotal	1			$	361			$	359			13			$	3,619			$	3,295
	Total	6			$	2,356			$	2,307			17			$	5,133			$	4,626
Summary of Troubled Debt Restructurings with Subsequent Payment Default	The following table presents loans by class for TDRs that have been modified within the previous twelve months and have subsequently had a payment default during the three months ended March 31, 2015 and 2014:
		Three Months Ended							Three Months Ended
		31-Mar-15							31-Mar-14
		Number of Loans			Balance				Number of Loans			Balance
		(Dollars In thousands)
	Legacy Loans:
	Real estate—commercial
	Retail	—			$	—			—			$	—
	Gas station & car wash	1			137				—			—
	Industrial & warehouse	1			21				—			—
	Other	1			348				—			—
	Commercial business	1			14				2			536
	Subtotal	4			$	520			2			$	536
	Acquired Loans:
	Real estate—commercial
	Retail	2			$	1,025			2			$	268
	Gas station & car wash	—			—				—			—
	Hotel & motel	—			—				—			—
	Industrial & warehouse	—			—				—			—
	Other	—			—				—			—
	Commercial business	1			48				2			44
	Subtotal	3			$	1,073			4			$	312
		7			$	1,593			6			$	848
Covered Non-performing Assets	The covered nonperforming assets at March 31, 2015 and December 31, 2014 were as follows:
		March 31, 2015				December 31, 2014
		(In thousands)
	Covered loans on nonaccrual status	$	1,304			$	1,355
	Covered OREO	96				96
	Total covered nonperforming assets	$	1,400			$	1,451
	Acquired covered loans	$	30,708			$	32,560

Borrowings_Tables

Borrowings (Tables)	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Contractual Maturities for FHLB-SF Borrowings	At March 31, 2015, the contractual maturities for FHLB advances were as follows:
		Contractual		Maturity/
		Maturities		Put Date
		(In thousands)
	Due within one year	$	50,000	$	70,881
	Due after one year through five years	430,881		410,000
		$	480,881	$	480,881

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Derivative [Line Items]
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]	At March 31, 2015, the following interest rate swaps related to our loan hedging program were outstanding
		As of March 31, 2015
	Interest rate swaps on loans with loan customers
	Notional amount (in thousands)	$	79,662
	Weighted average remaining term	7.3 years
	Received fixed rate (weighted average)	4.35		%
	Pay variable rate (weighted average)	2.5		%
	Estimated fair value	$	2,764
	Back to back interest rate swaps with correspondent banks
	Notional amount (in thousands)	$	79,662
	Weighted average remaining term	7.3 years
	Received variable rate (weighted average)	2.5		%
	Pay fixed rate (weighted average)	4.35		%
	Estimated fair value	$	(2,764	)

Subordinated_Debentures_Tables

Subordinated Debentures (Tables)	3 Months Ended
	Mar. 31, 2015
Subordinated Borrowings [Abstract]
Summary of Trust Preferred Securities and Debentures	The following table is a summary of trust preferred securities and Debentures at March 31, 2015:
	Issuance Trust	Issuance	Trust		Carrying Value of Subordinated		Rate	Stated Rate		Effective Rate			Maturity
		Date	Preferred		Debentures		Type						Date
			Security
			Amount
			(Dollars in thousands)
	Nara Capital Trust III	6/5/03	$	5,000	$	5,155	Variable	3.42	%	3.42	%		6/15/33
	Nara Statutory Trust IV	12/22/03	5,000		5,155		Variable	3.1	%	3.1	%		1/7/34
	Nara Statutory Trust V	12/17/03	10,000		10,310		Variable	3.22	%	3.22	%		12/17/33
	Nara Statutory Trust VI	3/22/07	8,000		8,248		Variable	1.92	%	1.92	%		6/15/37
	Center Capital Trust I	12/30/03	18,000		13,331		Variable	3.1	%	5.56	%	(1)	1/7/34
	TOTAL ISSUANCE		$	46,000	$	42,199
	(1) The Center Capital Trust I trust preferred security has a remaining discount of $5.3 million at March 31, 2015. The effective rate of the security includes the effect of the remaining discount accretion.

Intangible_Assets_Tables

Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	The following table provides information regarding the core deposit intangibles at March 31, 2015:
				As of March 31, 2015
		Amortization period		Gross			Accumulated
				Carrying			Amortization
				Amount
	Core deposit—Center Financial Corporation acquisition	7 years		$	4,100		$	(2,828	)
	Core deposit—PIB acquisition	7 years		603			(297		)
	Core deposit—Foster acquisition	10 years		2,763			(721		)
	Total			$	7,466		$	(3,846	)
Schedule of Servicing Assets	The changes in servicing assets for the three months ended March 31, 2015 and 2014 were as follows:
			Three Months Ended March 31,
			2015			2014
			(In thousands)
	Balance at beginning of period		$	10,341		$	8,915
	Additions through originations of servicing assets		1,045			815
	Amortization		(857		)	(607		)
	Balance at end of period		$	10,529		$	9,123
Summary of Fair Value Inputs	The inputs used in determining the fair value of the servicing assets at March 31, 2015 and December 31, 2014 are presented below.
			March 31, 2015			December 31, 2014
			Range			Range
	Weighted-average discount rate		5.30% ~ 5.68%			5.44% ~ 5.74%
	Constant prepayment rate		7.00% ~ 11.90%			8.80% ~12.40%

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	Assets and liabilities measured at fair value on a recurring basis are summarized below:
					Fair Value Measurements at the End of the Reporting Period Using
		March 31, 2015			Quoted Prices			Significant		Significant
					in Active			Other		Unobservable
					Markets for			Observable		Inputs
					Identical Assets			Inputs		(Level 3)
					(Level 1)			(Level 2)
		(In thousands)
	Assets:
	Securities available for sale:
	GSE collateralized mortgage obligations	$	329,303		$	—		$	329,303	$	—
	GSE mortgage-backed securities	447,313			—			447,313		—
	Trust preferred securities	3,956			—			3,956		—
	Municipal bonds	14,333			—			13,138		1,195
	Mutual funds	17,467			17,467			—		—
					Fair Value Measurements at the End of the Reporting Period Using
		December 31, 2014			Quoted Prices			Significant		Significant
					in Active			Other		Unobservable
					Markets for			Observable		Inputs
					Identical Assets			Inputs		(Level 3)
					(Level 1)			(Level 2)
		(In thousands)
	Assets:
	Securities available for sale:
	GSE collateralized mortgage obligations	$	302,774		$	—		$	302,774	$	—
	GSE mortgage-backed securities	465,489			—			465,489		—
	Trust preferred securities	3,987			—			3,987		—
	Municipal bonds	6,930			—			5,752		1,178
	Mutual funds	17,343			17,343			—		—
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	The table below presents a reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2015:
			Three Months Ended March 31,
			2015			2014
			(In thousands)
	Beginning Balance, January 1		$	1,178		$	1,112
	Purchases, issuances and settlements		—			—
	Amortization		—			—
	Total gains or (losses) included in earnings		—			—
	Total gains included in other comprehensive income		17			20
	Ending Balance, March 31		$	1,195		$	1,132
Assets Measured at Fair Value on a Non-recurring Basis	Assets measured at fair value on a non-recurring basis are summarized below:
					Fair Value Measurements at the End of the Reporting Period Using
		March 31, 2015			Quoted Prices			Significant		Significant
					in Active			Other		Unobservable
					Markets for			Observable		Inputs
					Identical Assets			Inputs		(Level 3)
					(Level 1)			(Level 2)
		(In thousands)
	Assets:
	Impaired loans at fair value:
	Real estate loans	$	37,813		$	—		$	37,813	$	—
	Commercial business	5,545			—			5,545		—
	Trade finance	1,654			—			1,654		—
	Consumer	584			—			584		—
	Loans held for sale, net	1,554			—			1,554		—
	OREO	3,065			—			3,065		—
					Fair Value Measurements at the End of the Reporting Period Using
		December 31, 2014			Quoted Prices			Significant		Significant
					in Active			Other		Unobservable
					Markets for			Observable		Inputs
					Identical Assets			Inputs		(Level 3)
					(Level 1)			(Level 2)
		(In thousands)
	Assets:
	Impaired loans at fair value:
	Real estate loans	$	43,708		$	—		$	43,708	$	—
	Commercial business	4,114			—			4,114		—
	Trade Finance	1,883			—			1,883		—
	Consumer	596			—			596		—
	Loans held for sale, net	2,000			—			2,000		—
	OREO	17,985			—			17,985		—
	For assets measured at fair value on a non-recurring basis, the total net gains (losses), which include charge offs, recoveries, specific reserves, and gains and losses on sales recognized are summarized below:
		For the Three Months ended March 31,
		2015			2014
		(In thousands)
	Assets:
	Impaired loans at fair value:
	Real estate loans	$	534		$	1,704
	Commercial business	1,274			(10,715		)
	Trade Finance	(310		)	(659		)
	Consumer	(12		)	(46		)
	Loans held for sale, net	182			—
	OREO	(425		)	(11		)
Carrying Amounts and Estimated Fair Values of Financial Instruments	Carrying amounts and estimated fair values of financial instruments, not previously presented, at March 31, 2015 and December 31, 2014 were as follows:
		March 31, 2015
		Carrying			Estimated			Fair Value Measurement Using
		Amount			Fair Value
		(In thousands)
	Financial Assets:
	Cash and cash equivalents	$	429,871		$	429,871		Level 1
	Loans held for sale	26,432			27,676			Level 2
	Loans receivable—net	5,641,045			5,998,374			Level 3
	Customers’ liabilities on acceptances	1,029			1,029			Level 2
	Financial Liabilities:
	Noninterest bearing deposits	$	1,616,935		$	1,616,935		Level 2
	Saving and other interest bearing demand deposits	1,785,990			1,785,990			Level 2
	Time deposits	2,400,329			2,404,910			Level 2
	FHLB advances	480,881			483,574			Level 2
	Subordinated debentures	42,199			43,970			Level 2
	Bank’s liabilities on acceptances outstanding	1,029			1,029			Level 2
		December 31, 2014
		Carrying			Estimated			Fair Value Measurement Using
		Amount			Fair Value
		(In thousands)
	Financial Assets:
	Cash and cash equivalents	$	462,160		$	462,160		Level 1
	Loans held for sale	28,311			29,626			Level 2
	Loans receivable—net	5,497,434			5,826,924			Level 3
	Customers’ liabilities on acceptances	1,889			1,889			Level 2
	Financial Liabilities:
	Noninterest bearing deposits	$	1,543,018		$	1,543,018		Level 2
	Saving and other interest bearing demand deposits	1,862,060			1,862,060			Level 2
	Time deposits	2,288,374			2,292,831			Level 2
	FHLB advances	480,975			481,290			Level 2
	Subordinated debentures	42,158			43,987			Level 2
	Bank’s liabilities on acceptances outstanding	1,889			1,889			Level 2

Stockholders_Equity_Tables

Stockholders’ Equity (Tables)	3 Months Ended
	Mar. 31, 2015
Stockholders’ Equity and Regulatory Matters [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents the components of accumulated other comprehensive loss at March 31, 2015 and December 31, 2014:
		March 31, 2015		December 31, 2014
		(In thousands)
	Net unrealized gain on securities available for sale	$	4,409	$	1,631
	Net unrealized gain on interest-only strips	79		74
	Total accumulated other comprehensive loss	$	4,488	$	1,705

Regulatory_Matters_Tables

Regulatory Matters (Tables)	3 Months Ended
	Mar. 31, 2015
Banking and Thrift [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	he Bank’s category.
	The Company’s and the Bank’s actual capital amounts and ratios are presented in the table below:
		Actual				Required				Required
						For Capital				To Be Well
						Adequacy Purposes				Capitalized under
										Prompt Corrective
										Action Provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
		(Dollars in thousands)
	As of March 31, 2015
	Common equity tier 1 capital (to risk weighted assets):
	Company	$	788,601	12.73	%	$	278,757	4.5	%	N/A		N/A
	Bank	$	817,754	13.21	%	$	278,512	4.5	%	$	402,295	6.5	%
	Total capital (to risk-weighted assets):
	Company	$	900,301	14.53	%	$	495,568	8	%	N/A		N/A
	Bank	$	888,680	14.36	%	$	495,132	8	%	$	618,916	10	%
	Tier I capital (to risk-weighted assets):
	Company	$	829,375	13.39	%	$	371,676	6	%	N/A		N/A
	Bank	$	817,754	13.21	%	$	371,349	6	%	$	495,132	8	%
	Tier I capital (to average assets):
	Company	$	829,375	11.76	%	$	282,116	4	%	N/A		N/A
	Bank	$	817,754	11.6	%	$	281,961	4	%	$	352,451	5	%
		Actual				Required				Required
						For Capital				To Be Well
						Adequacy Purposes				Capitalized under
										Prompt Corrective
										Action Provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
		(Dollars in thousands)
	As of December 31, 2014
	Total capital (to risk-weighted assets):
	Company	$	881,794	14.8	%	$	476,490	8	%	N/A		N/A
	Bank	$	869,343	14.61	%	$	476,101	8	%	$	595,126	10	%
	Tier I capital (to risk-weighted assets):
	Company	$	812,464	13.64	%	$	238,245	4	%	N/A		N/A
	Bank	$	800,013	13.44	%	$	238,050	4	%	$	357,076	6	%
	Tier I capital (to average assets):
	Company	$	812,464	11.62	%	$	279,709	4	%	N/A		N/A
	Bank	$	800,013	11.45	%	$	279,585	4	%	$	349,481	5	%

Business_Combinations_Summary_

Business Combinations - Summary of Assets Acquired and Liabilities Assumed (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Goodwill	$105,401	$105,401

Business_Combinations_Addition

Business Combinations - Additional Information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill	$105,401		$105,401
Merger and integration expense	$52	$173

StockBased_Compensation_Plan_D

Stock-Based Compensation - Plan Description (Details)	3 Months Ended
	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)	2,499,172
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock, percent	100.00%
Restricted stock, performance shares and performance units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock, restriction period	1 year
Time based vesting of grants | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock, restriction period	3 years
BBCN 2007 Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock, percent	100.00%
BBCN 2007 Plan | Stock options and stock appreciation rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term	10 years
BBCN 2007 Plan | Stock options and stock appreciation rights | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
BBCN 2007 Plan | Stock options and stock appreciation rights | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	5 years
2006 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage	20.00%
2006 Plan | Nonemployee director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term	10 years
Award vesting rights, percentage	33.00%

StockBased_Compensation_Stock_

Stock-Based Compensation - Stock Option Activity (Details) (Stock options, USD $)	3 Months Ended
	Mar. 31, 2015
Stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding - beginning of period (in shares)	591,652
Granted (in shares)	0
Exercised (in shares)	0
Expired (in shares)	0
Forfeited (in shares)	0
Outstanding - end of period (in shares)	591,652
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding - beginning of period, Weighted-Average Exercise Price Per Share (in dollars per share)	$19
Granted, Weighted-Average Exercise Price Per Share (in dollars per share)	$0
Exercised, Weighted-Average Exercise Price Per Share (in dollars per share)	$0
Expired, Weighted-Average Exercise Price Per Share (in dollars per share)	$0
Forfeited, Weighted-Average Exercise Price Per Share (in dollars per share)	$0
Outstanding - end of period, Weighted-Average Exercise Price Per Share (in dollars per share)	$19
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options exercisable - end of period (in shares)	381,652
Options exercisable, Weighted-Average Exercise Price Per Share (in dollars per share)	$20.70
Outstanding, Weighted-Average Remaining Contractual Life (Years)	1 year 8 months 22 days
Options exercisable, Weighted-Average Remaining Contractual Life (Years)	1 year 8 months 22 days
Outstanding, Aggregate Intrinsic Value	$0
Options exercisable, Aggregate Intrinsic Value	$0

StockBased_Compensation_Restri

Stock-Based Compensation - Restricted and Performance Unit Activity (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Allocated share-based compensation expense	$208,000	$104,000
Tax benefit from compensation expense	83,000	0
Retricted and performance unit activity
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding - beginning of period (in shares)	175,668
Granted (in shares)	5,000
Vested (in shares)	-42,883
Forfeited (in shares)	0
Outstanding - end of period (in shares)	137,785
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding - beginning of period, Weighted-Average Grant Date Fair Value (in dollars per share)	$13.52
Granted, Weighted-Average Grant Date Fair Value (in dollars per share)	$13.69
Vested, Weighted-Average Grant Date Fair Value (in dollars per share)	$11.68
Forfeited, Weighted-Average Grant Date Fair Value (in dollars per share)	$0
Outstanding - end of period, Weighted-Average Grant Date Fair Value (in dollars per share)	$14.10
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Total compensation cost not yet recognized	1,700,000
Total compensation cost not yet recognized, period for recognition	3 years 1 month 10 days
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Equity instruments other than options, vested in period	575,000	800,000
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Total compensation cost not yet recognized	$200,000
Total compensation cost not yet recognized, period for recognition	4 years 3 months 10 days

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net income (Numerator)
Net income available to common stockholders - basic	$21,358	$22,196
Net income available to common stockholders - diluted	$21,358	$22,196
Shares (Denominator)
Weighted-Average Shares (Denominator) (shares)	79,526,218	79,489,579
Effect of Dilutive Securities:
Stock options and performance units (shares)	27,359	58,591
Common stock warrants (shares)	48,545	91,669
Diluted EPS - common stock (shares)	79,602,122	79,639,839
Per Share (Amount)
Basic EPS - common stock (in dollars per share)	$0.27	$0.28
Diluted EPS - common stock (in dollars per share)	$0.27	$0.28
Stock options and restricted shares
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive shares of common stock	627,818
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive shares of common stock	18,882	18,392

Securities_Available_for_Sale_1

Securities Available for Sale (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Unrealized gains on securities available for sale and interest only strips	$5,255	$11,140
Amortized Cost	804,905		793,877
Gross Unrealized Gains	10,428		8,347
Gross Unrealized Losses	-2,961		-5,701
Estimated Fair Value	812,372		796,523
GSE collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	328,066		304,947
Gross Unrealized Gains	2,650		1,376
Gross Unrealized Losses	-1,413		-3,549
Estimated Fair Value	329,303		302,774
GSE mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	441,097		460,487
Gross Unrealized Gains	7,178		6,528
Gross Unrealized Losses	-962		-1,526
Estimated Fair Value	447,313		465,489
Trust preferred securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,535		4,531
Gross Unrealized Gains	0		0
Gross Unrealized Losses	-579		-544
Estimated Fair Value	3,956		3,987
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	13,782		6,487
Gross Unrealized Gains	558		443
Gross Unrealized Losses	-7		0
Estimated Fair Value	14,333		6,930
Total Debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	787,480		776,452
Gross Unrealized Gains	10,386		8,347
Gross Unrealized Losses	-2,961		-5,619
Estimated Fair Value	794,905		779,180
Mutual funds - GSE mortgage related securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	17,425		17,425
Gross Unrealized Gains	42		0
Gross Unrealized Losses	0		-82
Estimated Fair Value	$17,467		$17,343

Securities_Available_for_Sale_2

Securities Available for Sale - Proceeds, Gains and Losses (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Available-for-sale Securities [Abstract]
Reclassification adjustments for gains realized in income	($424)	$0
Proceeds	22,510	0
Gross gains	424	0
Gross losses	$0	$0

Securities_Available_for_Sale_3

Securities Available for Sale - Amortized Cost and Estimated Fair Value (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Amortized Cost - Due within one year	$340,000
Amortized Cost - Due after one year through five years	754,000
Amortized Cost - Due after five years through ten years	9,207,000
Amortized Cost - Due after ten years	8,016,000
Amortized Cost	804,905,000	793,877,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Estimated Fair Value - Due within one year	343,000
Estimated Fair Value - Due after one year through five years	839,000
Estimated Fair Value - Due after five years through ten years	9,605,000
Estimated Fair Value - Due after ten years	7,502,000
Estimated Fair Value	812,372,000	796,523,000
Available-for-sale Securities, Restricted	361,000,000	366,200,000
GSE collateralized mortgage obligations
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Amortized Cost - no single maturity date	328,066,000
Amortized Cost	328,066,000	304,947,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Estimated Fair Value - no single maturity date	329,303,000
Estimated Fair Value	329,303,000	302,774,000
GSE mortgage-backed securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Amortized Cost - no single maturity date	441,097,000
Amortized Cost	441,097,000	460,487,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Estimated Fair Value - no single maturity date	447,313,000
Estimated Fair Value	447,313,000	465,489,000
Mutual funds - GSE mortgage related securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Amortized Cost - no single maturity date	17,425,000
Amortized Cost	17,425,000	17,425,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Estimated Fair Value - no single maturity date	17,467,000
Estimated Fair Value	$17,467,000	$17,343,000

Securities_Available_for_Sale_4

Securities Available for Sale - Aggregate Unrealized Losses and Fair Value (Details) (USD $)	3 Months Ended			12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
	security
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions [Abstract]
Number of Securities, Less than 12 months	12			14
Number of Securities, 12 months or longer	13			21
Number of Securities, Total	25			35
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than 12 months	$73,269			109,322
Fair Value - 12 months or longer	123,984			212,930
Fair Value - Total	197,253			322,252
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses - Less than 12 months	-241			-646
Gross Unrealized Losses - 12 months or longer	-2,720			-5,055
Gross Unrealized Losses - Total	-2,961			-5,701
Unrealized gain on available-for-sale securities	5,255		11,140
Reclassification out of accumulated other comprehensive income as a result of securities being sold	424		0
GSE collateralized mortgage obligations
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions [Abstract]
Number of Securities, Less than 12 months	4	[1]		7	[1]
Number of Securities, 12 months or longer	9	[1]		13	[1]
Number of Securities, Total	13	[1]		20	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than 12 months	23,794	[1]		71,189	[1]
Fair Value - 12 months or longer	89,356	[1]		133,563	[1]
Fair Value - Total	113,150	[1]		204,752	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses - Less than 12 months	-66	[1]		-507	[1]
Gross Unrealized Losses - 12 months or longer	-1,347	[1]		-3,042	[1]
Gross Unrealized Losses - Total	-1,413	[1]		-3,549	[1]
GSE mortgage-backed securities
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions [Abstract]
Number of Securities, Less than 12 months	6	[1]		7	[1]
Number of Securities, 12 months or longer	3	[1]		6	[1]
Number of Securities, Total	9	[1]		13	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than 12 months	48,076	[1]		38,133	[1]
Fair Value - 12 months or longer	30,672	[1]		62,036	[1]
Fair Value - Total	78,748	[1]		100,169	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses - Less than 12 months	-168	[1]		-139	[1]
Gross Unrealized Losses - 12 months or longer	-794	[1]		-1,387	[1]
Gross Unrealized Losses - Total	-962	[1]		-1,526	[1]
Trust preferred securities
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions [Abstract]
Number of Securities, Less than 12 months	0			0
Number of Securities, 12 months or longer	1			1
Number of Securities, Total	1			1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than 12 months	0			0
Fair Value - 12 months or longer	3,956			3,988
Fair Value - Total	3,956			3,988
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses - Less than 12 months	0			0
Gross Unrealized Losses - 12 months or longer	-579			-544
Gross Unrealized Losses - Total	-579			-544
Municipal bonds
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions [Abstract]
Number of Securities, Less than 12 months	2			0
Number of Securities, 12 months or longer	0			0
Number of Securities, Total	2			0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than 12 months	1,399			0
Fair Value - 12 months or longer	0			0
Fair Value - Total	1,399			0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses - Less than 12 months	-7			0
Gross Unrealized Losses - 12 months or longer	0			0
Gross Unrealized Losses - Total	-7			0
Mutual funds - GSE mortgage related securities
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions [Abstract]
Number of Securities, Less than 12 months	0			0
Number of Securities, 12 months or longer	0			1
Number of Securities, Total	0			1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than 12 months	0			0
Fair Value - 12 months or longer	0			13,343
Fair Value - Total	0			13,343
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses - Less than 12 months	0			0
Gross Unrealized Losses - 12 months or longer	0			-82
Gross Unrealized Losses - Total	$0			-82
Credit concentration risk | Stockholders' equity | Non-US Government and agency securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Maximum exposure to any single issuer	10.00%			10.00%
[1]	Investments in U.S. Government agency and U.S. Government sponsored enterprises

Loans_Receivable_and_Allowance2

Loans Receivable and Allowance for Loan Losses - Schedule of Accounts, Notes, Loans and Financing Receivable (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
	segment
Real estate loans:
Loans	$5,713,947	$5,568,082
Less: deferred loan fees	-3,308	-2,890
Loans receivable	5,710,639	5,565,192
Less: allowance for loan losses	-69,594	-67,758	-65,699	-67,320
Loans receivable, net of allowance for loan losses	5,641,045	5,497,434
Number of portfolio segments	4
Real estate loans
Real estate loans:
Loans	4,554,128	4,439,850
Real estate loans | Residential
Real estate loans:
Loans	23,092	21,415
Less: allowance for loan losses	-146	-146
Real estate loans | Commercial & industrial
Real estate loans:
Loans	4,423,331	4,324,349
Less: allowance for loan losses	-48,594	-46,535
Real estate loans | Construction
Real estate loans:
Loans	107,705	94,086
Less: allowance for loan losses	-756	-667
Commercial business
Real estate loans:
Loans	949,701	903,621
Less: allowance for loan losses	-16,590	-16,471
Trade finance
Real estate loans:
Loans	122,560	134,762
Less: allowance for loan losses	-3,041	-3,456
Consumer and other
Real estate loans:
Loans	87,558	89,849
Less: allowance for loan losses	($467)	($483)

Loans_Receivable_and_Allowance3

Loans Receivable and Allowance for Loan Losses - Accretable Yield Movement Schedule on Acquired Credit Impaired Loans in Center Merger (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$24,051	$47,398
Accretion	-1,555	-4,867
Changes in expected cash flows	149	-9,948
Balance at end of period	$22,645	$32,583

Loans_Receivable_and_Allowance4

Loans Receivable and Allowance for Loan Losses - Allowance for Credit Losses on Financing Receivables (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	$67,758	$67,320
Provision (credit) for loan losses	1,500	3,026
Loans charged off	-1,125	-5,263
Recoveries of charged offs	1,461	616
Balance, end of period	69,594	65,699
Allowance for loan losses:
Allowance for loan losses - Individually evaluated for impairment	9,899		10,922
Allowance for loan losses - Collectively evaluated for impairment	47,048		49,489
Allowance for loan losses - Total	69,594	65,699
Loans outstsanding:
Loans outstanding - Individually evaluated for impairment	122,737		127,145
Loans outstanding - Collectively evaluated for impairment	5,442,699		5,281,300
Loans outstanding - ACILs	5,641,045		5,497,434
Total loans outstanding	5,713,947		5,568,082
Legacy
Loans outstsanding:
Total loans outstanding	5,128,232		4,919,570
Acquired
Loans outstsanding:
Total loans outstanding	585,715		648,512
Real estate
Loans outstsanding:
Total loans outstanding	4,554,128		4,439,850
Real estate | Legacy
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	38,775	40,068
Provision (credit) for loan losses	-3,621	-1,414
Loans charged off	-182	-87
Recoveries of charged offs	800	19
Balance, end of period	35,772	38,586
Allowance for loan losses:
Allowance for loan losses - Individually evaluated for impairment	1,882		1,940
Allowance for loan losses - Collectively evaluated for impairment	33,890		36,835
Allowance for loan losses - Total	35,772	38,586
Loans outstsanding:
Loans outstanding - Individually evaluated for impairment	55,345		57,506
Loans outstanding - Collectively evaluated for impairment	4,029,737		3,864,289
Total loans outstanding	4,085,082		3,921,795
Real estate | Acquired
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	8,573	6,482
Provision (credit) for loan losses	5,310	451
Loans charged off	-159	-95
Recoveries of charged offs	0	0
Balance, end of period	13,724	6,838
Allowance for loan losses:
Allowance for loan losses - Individually evaluated for impairment	417		434
Allowance for loan losses - Collectively evaluated for impairment	660		792
Allowance for loan losses - Total	13,724	6,838
Loans outstsanding:
Loans outstanding - Individually evaluated for impairment	18,894		20,035
Loans outstanding - Collectively evaluated for impairment	354,580		397,147
Total loans outstanding	469,046		518,055
Commercial business
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			16,471
Balance, end of period	16,590		16,471
Allowance for loan losses:
Allowance for loan losses - Total	16,590		16,471
Loans outstsanding:
Total loans outstanding	949,701		903,621
Commercial business | Legacy
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	15,986	16,796
Provision (credit) for loan losses	-22	2,547
Loans charged off	-451	-3,725
Recoveries of charged offs	655	590
Balance, end of period	16,168	16,208
Allowance for loan losses:
Allowance for loan losses - Individually evaluated for impairment	5,921		6,929
Allowance for loan losses - Collectively evaluated for impairment	10,247		9,057
Allowance for loan losses - Total	16,168	16,208
Loans outstsanding:
Loans outstanding - Individually evaluated for impairment	39,331		40,829
Loans outstanding - Collectively evaluated for impairment	842,903		784,407
Total loans outstanding	882,234		825,236
Commercial business | Acquired
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	485	796
Provision (credit) for loan losses	23	1,011
Loans charged off	-87	-1,220
Recoveries of charged offs	1	6
Balance, end of period	422	593
Allowance for loan losses:
Allowance for loan losses - Individually evaluated for impairment	286		307
Allowance for loan losses - Collectively evaluated for impairment	136		178
Allowance for loan losses - Total	422	593
Loans outstsanding:
Loans outstanding - Individually evaluated for impairment	1,689		1,778
Loans outstanding - Collectively evaluated for impairment	36,771		43,460
Total loans outstanding	67,467		78,385
Trade finance
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			3,456
Balance, end of period	3,041		3,456
Allowance for loan losses:
Allowance for loan losses - Total	3,041		3,456
Loans outstsanding:
Total loans outstanding	122,560		134,762
Trade finance | Legacy
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	3,456	2,653
Provision (credit) for loan losses	-186	348
Loans charged off	-229	-57
Recoveries of charged offs	0	0
Balance, end of period	3,041	2,944
Allowance for loan losses:
Allowance for loan losses - Individually evaluated for impairment	1,393		1,312
Allowance for loan losses - Collectively evaluated for impairment	1,648		2,144
Allowance for loan losses - Total	3,041	2,944
Loans outstsanding:
Loans outstanding - Individually evaluated for impairment	6,357		5,936
Loans outstanding - Collectively evaluated for impairment	116,203		128,826
Total loans outstanding	122,560		134,762
Trade finance | Acquired
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	0	0
Provision (credit) for loan losses	0	0
Loans charged off	0	0
Recoveries of charged offs	0	0
Balance, end of period	0	0
Allowance for loan losses:
Allowance for loan losses - Individually evaluated for impairment	0		0
Allowance for loan losses - Collectively evaluated for impairment	0		0
Allowance for loan losses - Total	0	0
Loans outstsanding:
Loans outstanding - Individually evaluated for impairment	0		0
Loans outstanding - Collectively evaluated for impairment	0		0
Total loans outstanding	0		0
Consumer and other
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			483
Balance, end of period	467		483
Allowance for loan losses:
Allowance for loan losses - Total	467		483
Loans outstsanding:
Total loans outstanding	87,558		89,849
Consumer and other | Legacy
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	427	461
Provision (credit) for loan losses	-1	7
Loans charged off	-13	-1
Recoveries of charged offs	3	0
Balance, end of period	416	467
Allowance for loan losses:
Allowance for loan losses - Individually evaluated for impairment	0		0
Allowance for loan losses - Collectively evaluated for impairment	416		427
Allowance for loan losses - Total	416	467
Loans outstsanding:
Loans outstanding - Individually evaluated for impairment	470		465
Loans outstanding - Collectively evaluated for impairment	37,886		37,312
Total loans outstanding	38,356		37,777
Consumer and other | Acquired
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	56	64
Provision (credit) for loan losses	-3	76
Loans charged off	-4	-78
Recoveries of charged offs	2	1
Balance, end of period	51	63
Allowance for loan losses:
Allowance for loan losses - Individually evaluated for impairment	0		0
Allowance for loan losses - Collectively evaluated for impairment	51		56
Allowance for loan losses - Total	51	63
Loans outstsanding:
Loans outstanding - Individually evaluated for impairment	651		596
Loans outstanding - Collectively evaluated for impairment	24,619		25,859
Total loans outstanding	49,202		52,072
Receivables acquired with deteriorated credit quality
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			7,347
Balance, end of period	12,647		7,347
Allowance for loan losses:
Allowance for loan losses - Total	12,647		7,347
Loans outstsanding:
Loans outstanding - ACILs	148,511		159,637
Receivables acquired with deteriorated credit quality | Real estate | Legacy
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses:
Allowance for loan losses - Total	0		0
Loans outstsanding:
Loans outstanding - ACILs	0		0
Receivables acquired with deteriorated credit quality | Real estate | Acquired
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			7,347
Balance, end of period	12,647		7,347
Allowance for loan losses:
Allowance for loan losses - Total	12,647		7,347
Loans outstsanding:
Loans outstanding - ACILs	95,572		100,873
Receivables acquired with deteriorated credit quality | Commercial business | Legacy
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses:
Allowance for loan losses - Total	0		0
Loans outstsanding:
Loans outstanding - ACILs	0		0
Receivables acquired with deteriorated credit quality | Commercial business | Acquired
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses:
Allowance for loan losses - Total	0		0
Loans outstsanding:
Loans outstanding - ACILs	29,007		33,147
Receivables acquired with deteriorated credit quality | Trade finance | Legacy
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses:
Allowance for loan losses - Total	0		0
Loans outstsanding:
Loans outstanding - ACILs	0		0
Receivables acquired with deteriorated credit quality | Trade finance | Acquired
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses:
Allowance for loan losses - Total	0		0
Loans outstsanding:
Loans outstanding - ACILs	0		0
Receivables acquired with deteriorated credit quality | Consumer and other | Legacy
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses:
Allowance for loan losses - Total	0		0
Loans outstsanding:
Loans outstanding - ACILs	0		0
Receivables acquired with deteriorated credit quality | Consumer and other | Acquired
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses:
Allowance for loan losses - Total	0		0
Loans outstsanding:
Loans outstanding - ACILs	$23,932		$25,617

Loans_Receivable_and_Allowance5

Loans Receivable and Allowance for Loan Losses - Impaired Financing Receivables (Details) (USD $)	3 Months Ended				12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	$67,009	[1]			$73,934	[1]
Recorded Investment, With no related allowance	55,728	[1]			53,211	[1]
Related Allowance	-9,899				-10,922
Impaired Loans, net of allowance	112,838				116,223
Total recorded investment	122,737	[1]			127,145	[1]
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	72,182				86,395
Unpaid Contractual Principal Balance, With no related allowance	77,233				70,351
Impaired Financing Receivable, Unpaid Principal Balance	149,415				156,746
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	70,472	[1]	79,052	[1]	77,098	[1]
Average Recorded Investment, With no related allowance	54,469	[1]	40,005	[1]	46,924	[1]
Average Recorded Investment, Total	124,941	[1]	119,057	[1]	124,022	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	659		700		2,695
Interest Income Recognized during Impairment, With no related allowance	322		167		1,106
Interest Income Recognized during Impairment, Total	981		867		3,801
Threshold period for loans to be placed on nonaccrual status	90 days
WIthout charge-offs
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	65,201				67,352
Recorded Investment, With no related allowance	49,330				46,885
With charge-offs
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	1,808				6,582
Recorded Investment, With no related allowance	6,398				6,326
Acquired
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	5,001	[1]			6,299	[1]
Recorded Investment, With no related allowance	16,235	[1]			16,109	[1]
Related Allowance	-704				-741
Total recorded investment	21,236	[1]			22,408	[1]
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	5,310				6,883
Unpaid Contractual Principal Balance, With no related allowance	21,046				20,704
Impaired Financing Receivable, Unpaid Principal Balance	26,356				27,587
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	5,651	[1]	7,453	[1]	6,083	[1]
Average Recorded Investment, With no related allowance	16,171	[1]	17,725	[1]	17,396	[1]
Average Recorded Investment, Total	21,822	[1]	25,178	[1]	23,479	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	47		23		177
Interest Income Recognized during Impairment, With no related allowance	37		20		119
Interest Income Recognized during Impairment, Total	84		43		296
Commercial & industrial | Retail
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance					4,902	[1]
Commercial & industrial | Hotel & motel
Impaired Loans, Recorded Investment
Recorded Investment, With no related allowance					5,992	[1]
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With no related allowance					8,728
Commercial & industrial | Gas station & car wash
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance					3,507
Commercial & industrial | Mixed use
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With no related allowance					1,697
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With no related allowance					1,415	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance					0
Interest Income Recognized during Impairment, With no related allowance					39
Commercial & industrial | Industrial & warehouse
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance					2,126
Commercial & industrial | Other
Impaired Loans, Recorded Investment
Related Allowance					-1,110
Real estate | Residential
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0	[1]			0	[1]
Recorded Investment, With no related allowance	0	[1]			0	[1]
Related Allowance	0				0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0				0
Unpaid Contractual Principal Balance, With no related allowance	0				0
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	[1]	0	[1]	0	[1]
Average Recorded Investment, With no related allowance	0	[1]	0	[1]	0	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0		0		0
Interest Income Recognized during Impairment, With no related allowance	0		0		0
Real estate | Residential | Acquired
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0	[1]			0	[1]
Recorded Investment, With no related allowance	0	[1]			0	[1]
Related Allowance	0				0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0				0
Unpaid Contractual Principal Balance, With no related allowance	0				0
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	[1]	0	[1]	0	[1]
Average Recorded Investment, With no related allowance	0	[1]	0	[1]	0	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0		0		0
Interest Income Recognized during Impairment, With no related allowance	0		0		0
Real estate | Commercial & industrial
Impaired Loans, Recorded Investment
Related Allowance	-2,299				-2,374
Real estate | Commercial & industrial | Retail
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	3,911	[1]
Recorded Investment, With no related allowance	9,875	[1]			11,708	[1]
Related Allowance	-127				-390
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	3,994				5,288
Unpaid Contractual Principal Balance, With no related allowance	11,786				13,492
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	4,406	[1]	5,826	[1]	5,205	[1]
Average Recorded Investment, With no related allowance	10,792	[1]	6,134	[1]	8,462	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	44		23		127
Interest Income Recognized during Impairment, With no related allowance	87		58		358
Real estate | Commercial & industrial | Retail | Acquired
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	2,602	[1]			1,653	[1]
Recorded Investment, With no related allowance	1,583	[1]			3,158	[1]
Related Allowance	-66				-36
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	2,588				1,638
Unpaid Contractual Principal Balance, With no related allowance	1,793				3,376
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	2,128	[1]	248	[1]	838	[1]
Average Recorded Investment, With no related allowance	2,370	[1]	1,539	[1]	1,869	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	37		1		97
Interest Income Recognized during Impairment, With no related allowance	6		7		27
Real estate | Commercial & industrial | Hotel & motel
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	11,585	[1]			13,401	[1]
Recorded Investment, With no related allowance	5,851	[1]
Related Allowance	-393				-469
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	12,413				14,548
Unpaid Contractual Principal Balance, With no related allowance	7,835
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	12,493	[1]	11,831	[1]	12,053	[1]
Average Recorded Investment, With no related allowance	5,922	[1]	6,501	[1]	6,655	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	129		133		532
Interest Income Recognized during Impairment, With no related allowance	0		0		0
Real estate | Commercial & industrial | Hotel & motel | Acquired
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance		[1]			0	[1]
Recorded Investment, With no related allowance	5,519	[1]			5,591	[1]
Related Allowance					0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance					0
Unpaid Contractual Principal Balance, With no related allowance	7,484				7,493
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	[1]	0	[1]	0	[1]
Average Recorded Investment, With no related allowance	5,555	[1]	6,410	[1]	6,067	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0		0		0
Interest Income Recognized during Impairment, With no related allowance	0		0		0
Real estate | Commercial & industrial | Gas station & car wash
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	813	[1]			1,904	[1]
Recorded Investment, With no related allowance	3,797	[1]			2,693	[1]
Related Allowance	-343				-379
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	965
Unpaid Contractual Principal Balance, With no related allowance	6,358				4,065
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	1,359	[1]	3,112	[1]	2,440	[1]
Average Recorded Investment, With no related allowance	3,245	[1]	4,750	[1]	4,139	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0		19		60
Interest Income Recognized during Impairment, With no related allowance	25		0		44
Real estate | Commercial & industrial | Gas station & car wash | Acquired
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	712	[1]			1,762	[1]
Recorded Investment, With no related allowance	1,032	[1]			9	[1]
Related Allowance	-339				-379
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	864				1,953
Unpaid Contractual Principal Balance, With no related allowance	1,079				297
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	1,237	[1]	1,786	[1]	1,783	[1]
Average Recorded Investment, With no related allowance	521	[1]	1,076	[1]	621	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0		15		60
Interest Income Recognized during Impairment, With no related allowance	15		0		0
Real estate | Commercial & industrial | Mixed use
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	481	[1]			482	[1]
Recorded Investment, With no related allowance	1,998	[1]			1,589	[1]
Related Allowance	-10				-13
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	497				497
Unpaid Contractual Principal Balance, With no related allowance	2,305
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	481	[1]	931	[1]	823	[1]
Average Recorded Investment, With no related allowance	1,793	[1]	1,071	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0		10
Interest Income Recognized during Impairment, With no related allowance	9		0
Real estate | Commercial & industrial | Mixed use | Acquired
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	352	[1]			352	[1]
Recorded Investment, With no related allowance	223	[1]			0	[1]
Related Allowance	-2				-2
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	348				348
Unpaid Contractual Principal Balance, With no related allowance	372				0
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	352	[1]	0	[1]	212	[1]
Average Recorded Investment, With no related allowance	111	[1]	233	[1]	275	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0		0		0
Interest Income Recognized during Impairment, With no related allowance	0		0		0
Real estate | Commercial & industrial | Industrial & warehouse
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	6,921	[1]			2,111	[1]
Recorded Investment, With no related allowance	9,460	[1]			14,374	[1]
Related Allowance	-31				-13
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	6,935
Unpaid Contractual Principal Balance, With no related allowance	11,189				17,940
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	4,516	[1]	10,188	[1]	7,309	[1]
Average Recorded Investment, With no related allowance	11,917	[1]	6,625	[1]	9,311	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	76		75		119
Interest Income Recognized during Impairment, With no related allowance	77		3		494
Real estate | Commercial & industrial | Industrial & warehouse | Acquired
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	359	[1]			0	[1]
Recorded Investment, With no related allowance	1,224	[1]			1,737	[1]
Related Allowance	-5				0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	359				0
Unpaid Contractual Principal Balance, With no related allowance	1,381				1,954
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	180	[1]	2,564	[1]	1,026	[1]
Average Recorded Investment, With no related allowance	1,481	[1]	4,213	[1]	2,673	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	5		0		0
Interest Income Recognized during Impairment, With no related allowance	1		3		39
Real estate | Commercial & industrial | Other
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	7,909	[1]			9,781	[1]
Recorded Investment, With no related allowance	10,158	[1]			7,083	[1]
Related Allowance	-1,395
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	8,267				10,389
Unpaid Contractual Principal Balance, With no related allowance	13,459				9,886
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	8,845	[1]	10,137	[1]	9,709	[1]
Average Recorded Investment, With no related allowance	8,620	[1]	2,844	[1]	5,118	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	88		94		355
Interest Income Recognized during Impairment, With no related allowance	38		16		93
Real estate | Commercial & industrial | Other | Acquired
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	317	[1]			1,763	[1]
Recorded Investment, With no related allowance	4,972	[1]			4,009	[1]
Related Allowance	-6				-17
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	317				2,016
Unpaid Contractual Principal Balance, With no related allowance	6,443				5,174
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	1,040	[1]	1,387	[1]	1,134	[1]
Average Recorded Investment, With no related allowance	4,490	[1]	2,179	[1]	3,798	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	4		2		5
Interest Income Recognized during Impairment, With no related allowance	10		8		41
Real estate | Construction
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0	[1]			0	[1]
Recorded Investment, With no related allowance	1,480	[1]			1,521	[1]
Related Allowance	0				0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0				0
Unpaid Contractual Principal Balance, With no related allowance	1,525				1,545
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	[1]	0	[1]	0	[1]
Average Recorded Investment, With no related allowance	1,500	[1]	1,615	[1]	1,583	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0		0		0
Interest Income Recognized during Impairment, With no related allowance	0		21		0
Real estate | Construction | Acquired
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance		[1]			0	[1]
Recorded Investment, With no related allowance	0	[1]			0	[1]
Related Allowance					0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance					0
Unpaid Contractual Principal Balance, With no related allowance	0				0
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	[1]	0	[1]	0	[1]
Average Recorded Investment, With no related allowance	0	[1]	0	[1]	0	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0		0		0
Interest Income Recognized during Impairment, With no related allowance	0		0		0
Commercial business
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	30,411	[1]			37,300	[1]
Recorded Investment, With no related allowance	10,609	[1]			5,307	[1]
Related Allowance	-6,207				-7,236
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	30,785				38,730
Unpaid Contractual Principal Balance, With no related allowance	12,944				6,880
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	33,856	[1]	31,269	[1]	32,798	[1]
Average Recorded Investment, With no related allowance	7,958	[1]	8,854	[1]	8,349	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	287		297		1,502
Interest Income Recognized during Impairment, With no related allowance	79		61		50
Commercial business | Acquired
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	657	[1]			769	[1]
Recorded Investment, With no related allowance	1,033	[1]			1,009	[1]
Related Allowance	-286				-307
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	831				928
Unpaid Contractual Principal Balance, With no related allowance	1,771				1,758
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	713	[1]	1,468	[1]	1,090	[1]
Average Recorded Investment, With no related allowance	1,021	[1]	1,215	[1]	1,321	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	1		5		15
Interest Income Recognized during Impairment, With no related allowance	3		0		4
Trade finance
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	4,964	[1]			4,053	[1]
Recorded Investment, With no related allowance	1,393	[1]			1,883	[1]
Related Allowance	-1,393				-1,312
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	8,310				11,310
Unpaid Contractual Principal Balance, With no related allowance	8,650				5,000
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	4,509	[1]	5,490	[1]	6,647	[1]
Average Recorded Investment, With no related allowance	1,638	[1]	488	[1]	724	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	35		49		0
Interest Income Recognized during Impairment, With no related allowance	0		0		0
Trade finance | Acquired
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance		[1]			0	[1]
Recorded Investment, With no related allowance	0	[1]			0	[1]
Related Allowance					0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance					0
Unpaid Contractual Principal Balance, With no related allowance	0				0
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	[1]	0	[1]	0	[1]
Average Recorded Investment, With no related allowance	0	[1]	0	[1]	0	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0		0		0
Interest Income Recognized during Impairment, With no related allowance	0		0		0
Consumer and other
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	14	[1]			0	[1]
Recorded Investment, With no related allowance	1,107	[1]			1,061	[1]
Related Allowance	0				0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	16				0
Unpaid Contractual Principal Balance, With no related allowance	1,182				1,118
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	7	[1]	268	[1]	114	[1]
Average Recorded Investment, With no related allowance	1,084	[1]	1,123	[1]	1,168	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0		0		0
Interest Income Recognized during Impairment, With no related allowance	7		8		28
Consumer and other | Acquired
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	2	[1]			0	[1]
Recorded Investment, With no related allowance	649	[1]			596	[1]
Related Allowance	0				0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	3				0
Unpaid Contractual Principal Balance, With no related allowance	723				652
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	1	[1]	0	[1]	0	[1]
Average Recorded Investment, With no related allowance	622	[1]	860	[1]	772	[1]
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0		0		0
Interest Income Recognized during Impairment, With no related allowance	$2		$2		$8
[1]	Unpaid contractual principal balance less charge offs, interest applied to principal and purchase discounts.

Loans_Receivable_and_Allowance6

Loans Receivable and Allowance for Loan Losses - Past Due Financing Receivables (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$7,826,000		$6,499,000
Non-accrual loans	38,755,000	[1]	46,353,000	[2]
Total Delinquent loans	46,581,000		52,852,000
Guaranteed portion of delinquent SBA loans excluded from Nonaccrual loans	26,100,000		28,900,000
Legacy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,466,000		3,895,000
Non-accrual loans	23,212,000	[1]	28,815,000	[2]
Total Delinquent loans	29,678,000		32,710,000
Legacy | Real estate | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
Non-accrual loans	0	[1]	0	[2]
Total Delinquent loans	0		0
Legacy | Real estate | Commercial & industrial | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	273,000		552,000
Non-accrual loans	2,441,000	[1]	4,586,000	[2]
Total Delinquent loans	2,714,000		5,138,000
Legacy | Real estate | Commercial & industrial | Hotel & motel
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	767,000		299,000
Non-accrual loans	548,000	[1]	2,336,000	[2]
Total Delinquent loans	1,315,000		2,635,000
Legacy | Real estate | Commercial & industrial | Gas station & car wash
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	570,000		0
Non-accrual loans	2,151,000	[1]	2,105,000	[2]
Total Delinquent loans	2,721,000		2,105,000
Legacy | Real estate | Commercial & industrial | Mixed use
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	436,000		437,000
Non-accrual loans	1,120,000	[1]	930,000	[2]
Total Delinquent loans	1,556,000		1,367,000
Legacy | Real estate | Commercial & industrial | Industrial & warehouse
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		208,000
Non-accrual loans	1,251,000	[1]	2,335,000	[2]
Total Delinquent loans	1,251,000		2,543,000
Legacy | Real estate | Commercial & industrial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	81,000		979,000
Non-accrual loans	2,988,000	[1]	2,150,000	[2]
Total Delinquent loans	3,069,000		3,129,000
Legacy | Real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
Non-accrual loans	1,480,000	[1]	1,521,000	[2]
Total Delinquent loans	1,480,000		1,521,000
Legacy | Commercial business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,982,000		1,384,000
Non-accrual loans	8,174,000	[1]	9,640,000	[2]
Total Delinquent loans	12,156,000		11,024,000
Legacy | Trade finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	100,000		0
Non-accrual loans	3,047,000	[1]	3,194,000	[2]
Total Delinquent loans	3,147,000		3,194,000
Legacy | Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	257,000		36,000
Non-accrual loans	12,000	[1]	18,000	[2]
Total Delinquent loans	269,000		54,000
Acquired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,360,000	[3]	2,604,000	[3]
Non-accrual loans	15,543,000	[1],[3]	17,538,000	[2],[3]
Total Delinquent loans	16,903,000	[3]	20,142,000	[3]
Acquired | Real estate | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
Non-accrual loans	0	[1],[3]	0	[3]
Total Delinquent loans	0	[3]	0	[3]
Acquired | Real estate | Commercial & industrial | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	1,402,000	[3]
Non-accrual loans	1,339,000	[1],[3]	2,792,000	[3]
Total Delinquent loans	1,339,000	[3]	4,194,000	[3]
Acquired | Real estate | Commercial & industrial | Hotel & motel
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
Non-accrual loans	5,519,000	[1],[3]	5,591,000	[3]
Total Delinquent loans	5,519,000	[3]	5,591,000	[3]
Acquired | Real estate | Commercial & industrial | Gas station & car wash
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,032,000	[3]	0	[3]
Non-accrual loans	712,000	[1],[3]	736,000	[3]
Total Delinquent loans	1,744,000	[3]	736,000	[3]
Acquired | Real estate | Commercial & industrial | Mixed use
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	113,000	[3]	345,000	[3]
Non-accrual loans	574,000	[1],[3]	352,000	[3]
Total Delinquent loans	687,000	[3]	697,000	[3]
Acquired | Real estate | Commercial & industrial | Industrial & warehouse
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	361,000	[3]
Non-accrual loans	1,151,000	[1],[3]	1,185,000	[3]
Total Delinquent loans	1,151,000	[3]	1,546,000	[3]
Acquired | Real estate | Commercial & industrial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
Non-accrual loans	3,852,000	[1],[3]	4,370,000	[3]
Total Delinquent loans	3,852,000	[3]	4,370,000	[3]
Acquired | Real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
Non-accrual loans	0	[1],[3]	0	[3]
Total Delinquent loans	0	[3]	0	[3]
Acquired | Commercial business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	199,000	[3]	383,000	[3]
Non-accrual loans	1,370,000	[1],[3]	1,468,000	[3]
Total Delinquent loans	1,569,000	[3]	1,851,000	[3]
Acquired | Trade finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
Non-accrual loans	0	[1],[3]	0	[3]
Total Delinquent loans	0	[3]	0	[3]
Acquired | Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	16,000	[3]	113,000	[3]
Non-accrual loans	1,026,000	[1],[3]	1,044,000	[3]
Total Delinquent loans	1,042,000	[3]	1,157,000	[3]
30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,195,000		3,889,000
30 to 59 Days Past Due | Legacy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,901,000		2,083,000
30 to 59 Days Past Due | Legacy | Real estate | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
30 to 59 Days Past Due | Legacy | Real estate | Commercial & industrial | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		201,000
30 to 59 Days Past Due | Legacy | Real estate | Commercial & industrial | Hotel & motel
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	183,000		299,000
30 to 59 Days Past Due | Legacy | Real estate | Commercial & industrial | Gas station & car wash
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	329,000		0
30 to 59 Days Past Due | Legacy | Real estate | Commercial & industrial | Mixed use
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	436,000		437,000
30 to 59 Days Past Due | Legacy | Real estate | Commercial & industrial | Industrial & warehouse
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
30 to 59 Days Past Due | Legacy | Real estate | Commercial & industrial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		455,000
30 to 59 Days Past Due | Legacy | Real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
30 to 59 Days Past Due | Legacy | Commercial business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,596,000		655,000
30 to 59 Days Past Due | Legacy | Trade finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	100,000		0
30 to 59 Days Past Due | Legacy | Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	257,000		36,000
30 to 59 Days Past Due | Acquired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,294,000	[3]	1,806,000	[3]
30 to 59 Days Past Due | Acquired | Real estate | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
30 to 59 Days Past Due | Acquired | Real estate | Commercial & industrial | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	1,402,000	[3]
30 to 59 Days Past Due | Acquired | Real estate | Commercial & industrial | Hotel & motel
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
30 to 59 Days Past Due | Acquired | Real estate | Commercial & industrial | Gas station & car wash
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,032,000	[3]	0	[3]
30 to 59 Days Past Due | Acquired | Real estate | Commercial & industrial | Mixed use
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	113,000	[3]	345,000	[3]
30 to 59 Days Past Due | Acquired | Real estate | Commercial & industrial | Industrial & warehouse
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
30 to 59 Days Past Due | Acquired | Real estate | Commercial & industrial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
30 to 59 Days Past Due | Acquired | Real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
30 to 59 Days Past Due | Acquired | Commercial business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	133,000	[3]	36,000	[3]
30 to 59 Days Past Due | Acquired | Trade finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
30 to 59 Days Past Due | Acquired | Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	16,000	[3]	23,000	[3]
60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,631,000		2,249,000
60 to 89 Days Past Due | Legacy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,565,000		1,812,000
60 to 89 Days Past Due | Legacy | Real estate | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
60 to 89 Days Past Due | Legacy | Real estate | Commercial & industrial | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	273,000		351,000
60 to 89 Days Past Due | Legacy | Real estate | Commercial & industrial | Hotel & motel
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	584,000		0
60 to 89 Days Past Due | Legacy | Real estate | Commercial & industrial | Gas station & car wash
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	241,000		0
60 to 89 Days Past Due | Legacy | Real estate | Commercial & industrial | Mixed use
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
60 to 89 Days Past Due | Legacy | Real estate | Commercial & industrial | Industrial & warehouse
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		208,000
60 to 89 Days Past Due | Legacy | Real estate | Commercial & industrial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	81,000		524,000
60 to 89 Days Past Due | Legacy | Real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
60 to 89 Days Past Due | Legacy | Commercial business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	386,000		729,000
60 to 89 Days Past Due | Legacy | Trade finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
60 to 89 Days Past Due | Legacy | Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
60 to 89 Days Past Due | Acquired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	66,000	[3]	437,000	[3]
60 to 89 Days Past Due | Acquired | Real estate | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
60 to 89 Days Past Due | Acquired | Real estate | Commercial & industrial | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
60 to 89 Days Past Due | Acquired | Real estate | Commercial & industrial | Hotel & motel
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
60 to 89 Days Past Due | Acquired | Real estate | Commercial & industrial | Gas station & car wash
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
60 to 89 Days Past Due | Acquired | Real estate | Commercial & industrial | Mixed use
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
60 to 89 Days Past Due | Acquired | Real estate | Commercial & industrial | Industrial & warehouse
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
60 to 89 Days Past Due | Acquired | Real estate | Commercial & industrial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
60 to 89 Days Past Due | Acquired | Real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
60 to 89 Days Past Due | Acquired | Commercial business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	66,000	[3]	347,000	[3]
60 to 89 Days Past Due | Acquired | Trade finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
60 to 89 Days Past Due | Acquired | Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	90,000	[3]
90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		361,000
90 or More Days Past Due | Legacy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 or More Days Past Due | Legacy | Real estate | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 or More Days Past Due | Legacy | Real estate | Commercial & industrial | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 or More Days Past Due | Legacy | Real estate | Commercial & industrial | Hotel & motel
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 or More Days Past Due | Legacy | Real estate | Commercial & industrial | Gas station & car wash
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 or More Days Past Due | Legacy | Real estate | Commercial & industrial | Mixed use
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 or More Days Past Due | Legacy | Real estate | Commercial & industrial | Industrial & warehouse
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 or More Days Past Due | Legacy | Real estate | Commercial & industrial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 or More Days Past Due | Legacy | Real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 or More Days Past Due | Legacy | Commercial business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 or More Days Past Due | Legacy | Trade finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 or More Days Past Due | Legacy | Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 or More Days Past Due | Acquired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	361,000	[3]
90 or More Days Past Due | Acquired | Real estate | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
90 or More Days Past Due | Acquired | Real estate | Commercial & industrial | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
90 or More Days Past Due | Acquired | Real estate | Commercial & industrial | Hotel & motel
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
90 or More Days Past Due | Acquired | Real estate | Commercial & industrial | Gas station & car wash
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
90 or More Days Past Due | Acquired | Real estate | Commercial & industrial | Mixed use
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
90 or More Days Past Due | Acquired | Real estate | Commercial & industrial | Industrial & warehouse
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	361,000	[3]
90 or More Days Past Due | Acquired | Real estate | Commercial & industrial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
90 or More Days Past Due | Acquired | Real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
90 or More Days Past Due | Acquired | Commercial business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
90 or More Days Past Due | Acquired | Trade finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	[3]	0	[3]
90 or More Days Past Due | Acquired | Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$0	[3]	$0	[3]
[1]	Nonaccrual loans exclude the guaranteed portion of delinquent SBA loans that are in liquidation totaling $26.1 million.
[2]	Nonaccrual loans exclude guaranteed portion of delinquent SBA loans that are in liquidation totaling $28.9 million.
[3]	The Acquired Loans exclude ACILs.

Loans_Receivable_and_Allowance7

Loans Receivable and Allowance for Loan Losses - Financing Receivable Credit Quality Indicators (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]
Loans	$5,713,947	$5,568,082
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	5,391,657	5,221,685
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	112,298	122,335
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	207,817	221,875
Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	2,175	2,187
Real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	4,554,128	4,439,850
Real estate | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	23,092	21,415
Real estate | Commercial & industrial
Financing Receivable, Recorded Investment [Line Items]
Loans	4,423,331	4,324,349
Real estate | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	107,705	94,086
Commercial business
Financing Receivable, Recorded Investment [Line Items]
Loans	949,701	903,621
Trade finance
Financing Receivable, Recorded Investment [Line Items]
Loans	122,560	134,762
Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Loans	87,558	89,849
Legacy
Financing Receivable, Recorded Investment [Line Items]
Loans	5,128,232	4,919,570
Legacy | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	4,926,801	4,709,070
Legacy | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	90,041	96,092
Legacy | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	111,162	114,369
Legacy | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	228	39
Legacy | Real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	4,085,082	3,921,795
Legacy | Real estate | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	22,366	20,586
Legacy | Real estate | Residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	22,366	20,586
Legacy | Real estate | Residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy | Real estate | Residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy | Real estate | Residential | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy | Real estate | Commercial & industrial | Retail
Financing Receivable, Recorded Investment [Line Items]
Loans	1,031,656	1,050,177
Legacy | Real estate | Commercial & industrial | Retail | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	998,800	1,015,195
Legacy | Real estate | Commercial & industrial | Retail | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	19,594	20,177
Legacy | Real estate | Commercial & industrial | Retail | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	13,262	14,805
Legacy | Real estate | Commercial & industrial | Retail | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy | Real estate | Commercial & industrial | Hotel & motel
Financing Receivable, Recorded Investment [Line Items]
Loans	823,635	792,446
Legacy | Real estate | Commercial & industrial | Hotel & motel | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	817,621	784,586
Legacy | Real estate | Commercial & industrial | Hotel & motel | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	114	114
Legacy | Real estate | Commercial & industrial | Hotel & motel | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	5,900	7,746
Legacy | Real estate | Commercial & industrial | Hotel & motel | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy | Real estate | Commercial & industrial | Gas station & car wash
Financing Receivable, Recorded Investment [Line Items]
Loans	583,779	562,758
Legacy | Real estate | Commercial & industrial | Gas station & car wash | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	560,789	553,901
Legacy | Real estate | Commercial & industrial | Gas station & car wash | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	14,153	0
Legacy | Real estate | Commercial & industrial | Gas station & car wash | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	8,837	8,857
Legacy | Real estate | Commercial & industrial | Gas station & car wash | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy | Real estate | Commercial & industrial | Mixed use
Financing Receivable, Recorded Investment [Line Items]
Loans	304,352	291,743
Legacy | Real estate | Commercial & industrial | Mixed use | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	301,984	288,409
Legacy | Real estate | Commercial & industrial | Mixed use | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	792	1,147
Legacy | Real estate | Commercial & industrial | Mixed use | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	1,576	2,187
Legacy | Real estate | Commercial & industrial | Mixed use | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy | Real estate | Commercial & industrial | Industrial & warehouse
Financing Receivable, Recorded Investment [Line Items]
Loans	416,577	369,299
Legacy | Real estate | Commercial & industrial | Industrial & warehouse | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	398,807	347,805
Legacy | Real estate | Commercial & industrial | Industrial & warehouse | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	5,571	9,181
Legacy | Real estate | Commercial & industrial | Industrial & warehouse | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	12,199	12,313
Legacy | Real estate | Commercial & industrial | Industrial & warehouse | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy | Real estate | Commercial & industrial | Other
Financing Receivable, Recorded Investment [Line Items]
Loans	795,012	740,701
Legacy | Real estate | Commercial & industrial | Other | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	754,685	699,644
Legacy | Real estate | Commercial & industrial | Other | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	25,572	28,044
Legacy | Real estate | Commercial & industrial | Other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	14,755	13,013
Legacy | Real estate | Commercial & industrial | Other | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy | Real estate | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	107,705	94,085
Legacy | Real estate | Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	106,225	92,564
Legacy | Real estate | Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans		0
Legacy | Real estate | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	1,480	1,521
Legacy | Real estate | Construction | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy | Commercial business
Financing Receivable, Recorded Investment [Line Items]
Loans	882,234	825,236
Legacy | Commercial business | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	823,050	765,280
Legacy | Commercial business | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	18,996	18,792
Legacy | Commercial business | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	39,972	41,138
Legacy | Commercial business | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	216	26
Legacy | Trade finance
Financing Receivable, Recorded Investment [Line Items]
Loans	122,560	134,762
Legacy | Trade finance | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	104,595	103,844
Legacy | Trade finance | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	5,242	18,599
Legacy | Trade finance | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	12,723	12,319
Legacy | Trade finance | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Legacy | Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Loans	38,356	37,777
Legacy | Consumer and other | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	37,879	37,256
Legacy | Consumer and other | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	7	38
Legacy | Consumer and other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	458	470
Legacy | Consumer and other | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	12	13
Acquired
Financing Receivable, Recorded Investment [Line Items]
Loans	585,715	648,512
Acquired | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	464,856	512,615
Acquired | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	22,257	26,243
Acquired | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	96,655	107,506
Acquired | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	1,947	2,148
Acquired | Real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	469,046	518,055
Acquired | Real estate | Residential
Financing Receivable, Recorded Investment [Line Items]
Loans	726	829
Acquired | Real estate | Residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	438	539
Acquired | Real estate | Residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	288	290
Acquired | Real estate | Residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Real estate | Residential | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Real estate | Commercial & industrial | Retail
Financing Receivable, Recorded Investment [Line Items]
Loans	175,767	186,485
Acquired | Real estate | Commercial & industrial | Retail | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	150,030	157,485
Acquired | Real estate | Commercial & industrial | Retail | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	3,699	3,531
Acquired | Real estate | Commercial & industrial | Retail | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	22,038	25,469
Acquired | Real estate | Commercial & industrial | Retail | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Real estate | Commercial & industrial | Hotel & motel
Financing Receivable, Recorded Investment [Line Items]
Loans	66,979	82,366
Acquired | Real estate | Commercial & industrial | Hotel & motel | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	54,108	69,236
Acquired | Real estate | Commercial & industrial | Hotel & motel | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	3,834	3,889
Acquired | Real estate | Commercial & industrial | Hotel & motel | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	9,037	9,241
Acquired | Real estate | Commercial & industrial | Hotel & motel | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Real estate | Commercial & industrial | Gas station & car wash
Financing Receivable, Recorded Investment [Line Items]
Loans	35,544	37,115
Acquired | Real estate | Commercial & industrial | Gas station & car wash | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	27,352	27,936
Acquired | Real estate | Commercial & industrial | Gas station & car wash | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	391	369
Acquired | Real estate | Commercial & industrial | Gas station & car wash | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	7,801	8,542
Acquired | Real estate | Commercial & industrial | Gas station & car wash | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	268
Acquired | Real estate | Commercial & industrial | Mixed use
Financing Receivable, Recorded Investment [Line Items]
Loans	35,598	35,892
Acquired | Real estate | Commercial & industrial | Mixed use | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	25,647	25,843
Acquired | Real estate | Commercial & industrial | Mixed use | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	6,945	7,001
Acquired | Real estate | Commercial & industrial | Mixed use | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	3,006	3,048
Acquired | Real estate | Commercial & industrial | Mixed use | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Real estate | Commercial & industrial | Industrial & warehouse
Financing Receivable, Recorded Investment [Line Items]
Loans	70,078	81,058
Acquired | Real estate | Commercial & industrial | Industrial & warehouse | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	56,360	66,214
Acquired | Real estate | Commercial & industrial | Industrial & warehouse | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	1,536	667
Acquired | Real estate | Commercial & industrial | Industrial & warehouse | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	12,182	14,177
Acquired | Real estate | Commercial & industrial | Industrial & warehouse | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Real estate | Commercial & industrial | Other
Financing Receivable, Recorded Investment [Line Items]
Loans	84,354	94,310
Acquired | Real estate | Commercial & industrial | Other | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	69,129	76,956
Acquired | Real estate | Commercial & industrial | Other | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	549	2,076
Acquired | Real estate | Commercial & industrial | Other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	14,640	15,242
Acquired | Real estate | Commercial & industrial | Other | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	36	36
Acquired | Real estate | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Real estate | Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Real estate | Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Real estate | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Real estate | Construction | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Commercial business
Financing Receivable, Recorded Investment [Line Items]
Loans	67,467	78,385
Acquired | Commercial business | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	43,488	48,270
Acquired | Commercial business | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	3,319	6,331
Acquired | Commercial business | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	19,481	22,721
Acquired | Commercial business | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	1,179	1,063
Acquired | Trade finance
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Trade finance | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Trade finance | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Trade finance | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Trade finance | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired | Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Loans	49,202	52,072
Acquired | Consumer and other | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	38,304	40,136
Acquired | Consumer and other | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	1,696	2,089
Acquired | Consumer and other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	8,470	9,066
Acquired | Consumer and other | Doubtful or Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	$732	$781

Loans_Receivable_and_Allowance8

Loans Receivable and Allowance for Loan Losses - Loans Held For Investment - Reclassification to Held for Sale (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale or reclassification to held for sale	$450	$0
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale or reclassification to held for sale	384	0
Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale or reclassification to held for sale	$66	$0

Loans_Receivable_and_Allowance9

Loans Receivable and Allowance for Loan Losses - Allowance for Loans, by Portfolio Segment and Impairment Method (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Impaired [Line Items]
Positive or Negative Qualitative Adjustment of the Loss Migration Ratio or Individual Specific Reserve Allocations, In Basis Points	0.50%
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (gross carrying value)	$122,737	$127,145
Specific allowance	9,899	10,922
Loss coverage ratio	8.10%	8.60%
Non-impaired loans	5,591,210	5,440,937
General allowance	59,695	56,836
Loss coverage ratio	1.10%	1.00%
Total loans outstanding	5,713,947	5,568,082
Allowance for loan losses - Total	69,594	67,758	65,699	67,320
Loss coverage ratio	1.20%	1.20%
Real estate
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans outstanding	4,554,128	4,439,850
Real estate | Residential
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (gross carrying value)	0	0
Specific allowance	0	0
Loss coverage ratio	0.00%
Non-impaired loans	23,092	21,415
General allowance	146	146
Loss coverage ratio	0.60%	0.70%
Total loans outstanding	23,092	21,415
Allowance for loan losses - Total	146	146
Loss coverage ratio	0.60%	0.70%
Real estate | Commercial & industrial
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (gross carrying value)	72,759	76,020
Specific allowance	2,299	2,374
Loss coverage ratio	3.20%	3.10%
Non-impaired loans	4,350,572	4,248,329
General allowance	46,295	44,161
Loss coverage ratio	1.10%	1.00%
Total loans outstanding	4,423,331	4,324,349
Allowance for loan losses - Total	48,594	46,535
Loss coverage ratio	1.10%	1.10%
Real estate | Construction
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (gross carrying value)	1,480	1,521
Specific allowance	0	0
Loss coverage ratio	0.00%	0.00%
Non-impaired loans	106,225	92,565
General allowance	756	667
Loss coverage ratio	0.70%	0.70%
Total loans outstanding	107,705	94,086
Allowance for loan losses - Total	756	667
Loss coverage ratio	0.70%	0.70%
Commercial business
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (gross carrying value)	41,020	42,607
Specific allowance	6,207	7,236
Loss coverage ratio	15.10%	17.00%
Non-impaired loans	908,681	861,014
General allowance	10,383	9,235
Loss coverage ratio	1.10%	1.10%
Total loans outstanding	949,701	903,621
Allowance for loan losses - Total	16,590	16,471
Loss coverage ratio	1.70%	1.80%
Trade finance
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (gross carrying value)	6,357	5,936
Specific allowance	1,393	1,312
Loss coverage ratio	21.90%	22.10%
Non-impaired loans	116,203	128,826
General allowance	1,648	2,144
Loss coverage ratio	1.40%	1.70%
Total loans outstanding	122,560	134,762
Allowance for loan losses - Total	3,041	3,456
Loss coverage ratio	2.50%	2.60%
Consumer and other
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (gross carrying value)	1,121	1,061
Specific allowance	0	0
Loss coverage ratio	0.00%	0.00%
Non-impaired loans	86,437	88,788
General allowance	467	483
Loss coverage ratio	0.50%	0.50%
Total loans outstanding	87,558	89,849
Allowance for loan losses - Total	$467	$483
Loss coverage ratio	0.50%	0.50%

Recovered_Sheet1

Loans Receivable and Allowance for Loan Losses - Troubled Debt Restructurings on Financing Receivables (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
	loan	loan	loan
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	$74,964,000		$76,144,000
Number of modified contracts	6	17
Troubled Debt Restructuring, By Loan Class
Pre-Modification	2,356,000	5,133,000
Post-Modification	2,307,000	4,626,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	7	6
Balance	1,593,000	848,000
Specific reserves	5,000	535,000
Specific reserves for the TDRs	11,000	45,000
Charge offs	0	480,000
Specific reserves allocated to TDRs	3,700,000		5,700,000
Troubled debt restructuring , charge offs	43,000	18,000
Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	17,013,000		17,148,000
Troubled Debt Restructuring Concession, Type, Maturity/ Amortization Concession [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	31,485,000		31,544,000
Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	26,452,000		27,437,000
Principal forgiveness
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	14,000		15,000
TDR on accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	57,904,000		57,128,000
TDR on accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	12,648,000		12,791,000
TDR on accrual | Troubled Debt Restructuring Concession, Type, Maturity/ Amortization Concession [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	26,782,000		25,629,000
TDR on accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	18,474,000		18,708,000
TDR on accrual | Principal forgiveness
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	0		0
TDR on non-accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	17,060,000		19,016,000
TDR on non-accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	4,365,000		4,357,000
TDR on non-accrual | Troubled Debt Restructuring Concession, Type, Maturity/ Amortization Concession [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	4,703,000		5,915,000
TDR on non-accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	7,978,000		8,729,000
TDR on non-accrual | Principal forgiveness
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	14,000		15,000
Commercial & industrial | TDR on accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured			28,108,000
Number of modified contracts	26		24
Real estate | Commercial & industrial | TDR on accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	29,652,000		28,108,000
Real estate | Commercial & industrial | TDR on accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	12,137,000		12,235,000
Real estate | Commercial & industrial | TDR on accrual | Troubled Debt Restructuring Concession, Type, Maturity/ Amortization Concession [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	3,952,000		2,189,000
Real estate | Commercial & industrial | TDR on accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	13,563,000		13,684,000
Real estate | Commercial & industrial | TDR on accrual | Principal forgiveness
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	0		0
Real estate | Commercial & industrial | TDR on non-accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	12,687,000		13,520,000
Real estate | Commercial & industrial | TDR on non-accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	3,886,000		3,840,000
Real estate | Commercial & industrial | TDR on non-accrual | Troubled Debt Restructuring Concession, Type, Maturity/ Amortization Concession [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	1,039,000		1,207,000
Real estate | Commercial & industrial | TDR on non-accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	7,762,000		8,473,000
Real estate | Commercial & industrial | TDR on non-accrual | Principal forgiveness
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	0		0
Commercial business | TDR on accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	24,309,000		25,633,000
Number of modified contracts	29		30
Commercial business | TDR on accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	511,000		556,000
Commercial business | TDR on accrual | Troubled Debt Restructuring Concession, Type, Maturity/ Amortization Concession [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	18,887,000		20,053,000
Commercial business | TDR on accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	4,911,000		5,024,000
Commercial business | TDR on accrual | Principal forgiveness
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	0		0
Commercial business | TDR on non-accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	2,570,000		3,770,000
Commercial business | TDR on non-accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	479,000		517,000
Commercial business | TDR on non-accrual | Troubled Debt Restructuring Concession, Type, Maturity/ Amortization Concession [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	2,035,000		3,158,000
Commercial business | TDR on non-accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	42,000		80,000
Commercial business | TDR on non-accrual | Principal forgiveness
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	14,000		15,000
Trade Finance and Other | TDR on accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	3,943,000		3,387,000
Trade Finance and Other | TDR on accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	0		0
Trade Finance and Other | TDR on accrual | Troubled Debt Restructuring Concession, Type, Maturity/ Amortization Concession [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	3,943,000		3,387,000
Trade Finance and Other | TDR on accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	0		0
Trade Finance and Other | TDR on accrual | Principal forgiveness
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	0		0
Trade Finance and Other | TDR on non-accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	1,803,000		1,726,000
Trade Finance and Other | TDR on non-accrual | Payment concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	0		0
Trade Finance and Other | TDR on non-accrual | Troubled Debt Restructuring Concession, Type, Maturity/ Amortization Concession [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	1,629,000		1,550,000
Trade Finance and Other | TDR on non-accrual | Rate concession
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	174,000		176,000
Trade Finance and Other | TDR on non-accrual | Principal forgiveness
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	0		0
Consumer and other | TDR on accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured	3,943,000		3,387,000
Number of modified contracts	3		3
Legacy
Financing Receivable, Modifications [Line Items]
Number of modified contracts	5	4
Troubled Debt Restructuring, By Loan Class
Pre-Modification	1,995,000	1,514,000
Post-Modification	1,948,000	1,331,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	4	2
Balance	520,000	536,000
Legacy | Real estate
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	0
Post-Modification	0	0
Legacy | Real estate | Payment concession
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	2
Balance	158,000
Legacy | Real estate | Troubled Debt Restructuring Concession, Type, Maturity/ Amortization Concession [Member]
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	1
Balance	348,000
Legacy | Real estate | Retail
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	0
Post-Modification	0	0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	0
Balance	0	0
Legacy | Real estate | Hotel & motel
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	0
Post-Modification	0	0
Legacy | Real estate | Gas station & car wash
Financing Receivable, Modifications [Line Items]
Number of modified contracts	1	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	142,000	0
Post-Modification	137,000	0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	1	0
Balance	137,000	0
Legacy | Real estate | Mixed use
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	0
Post-Modification	0	0
Legacy | Real estate | Industrial & warehouse
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	0
Post-Modification	0	0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	1	0
Balance	21,000	0
Legacy | Real estate | Other
Financing Receivable, Modifications [Line Items]
Number of modified contracts	2	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	1,762,000	1,023,000
Post-Modification	1,765,000	1,018,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	1	0
Balance	348,000	0
Legacy | Real estate | Commercial & industrial | Rate concession
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans		0
Legacy | Commercial business
Financing Receivable, Modifications [Line Items]
Number of modified contracts	2	2
Troubled Debt Restructuring, By Loan Class
Pre-Modification	91,000	296,000
Post-Modification	46,000	121,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	1	2
Balance	14,000	536,000
Legacy | Commercial business | Payment concession
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	1
Balance	14,000
Legacy | Commercial business | Troubled Debt Restructuring Concession, Type, Maturity/ Amortization Concession [Member]
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans		2
Legacy | Trade finance
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	0
Post-Modification	0	0
Legacy | Consumer and other
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	195,000
Post-Modification	0	192,000
Acquired
Financing Receivable, Modifications [Line Items]
Number of modified contracts	1	13
Troubled Debt Restructuring, By Loan Class
Pre-Modification	361,000	3,619,000
Post-Modification	359,000	3,295,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	3	4
Balance	1,073,000	312,000
Acquired | Commercial & industrial | Rate concession
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Balance	119,000
Acquired | Real estate
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	0
Post-Modification	0	0
Acquired | Real estate | Payment concession
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans		2
Balance		268,000
Acquired | Real estate | Retail
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	2
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	1,075,000
Post-Modification	0	1,062,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	2	2
Balance	1,025,000	268,000
Acquired | Real estate | Hotel & motel
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	0
Post-Modification	0	0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	0	0
Balance	0	0
Acquired | Real estate | Gas station & car wash
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	794,000
Post-Modification	0	756,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	0	0
Balance	0	0
Acquired | Real estate | Mixed use
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	0
Post-Modification	0	0
Acquired | Real estate | Industrial & warehouse
Financing Receivable, Modifications [Line Items]
Number of modified contracts	1	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	361,000	75,000
Post-Modification	359,000	74,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	0	0
Balance	0	0
Acquired | Real estate | Other
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	1,023,000
Post-Modification	0	1,001,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	0	0
Balance	0	0
Acquired | Real estate | Commercial & industrial | Payment concession
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	1
Balance	906,000
Acquired | Real estate | Commercial & industrial | Rate concession
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	1
Acquired | Commercial business
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	7
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	457,000
Post-Modification	0	215,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	1	2
Balance	48,000	44,000
Acquired | Commercial business | Payment concession
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans	1	2
Balance	48,000	44,000
Acquired | Commercial business | Troubled Debt Restructuring Concession, Type, Maturity/ Amortization Concession [Member]
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Balance		536,000
Acquired | Trade finance
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	0
Post-Modification	0	0
Acquired | Consumer and other
Financing Receivable, Modifications [Line Items]
Number of modified contracts	0	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	0	195,000
Post-Modification	$0	$187,000

Recovered_Sheet2

Loans Receivable and Allowance for Loan Losses - Covered Loans (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Covered Nonperforming Assets
Covered loans on non-accrual status	$1,304	$1,355
Covered other real estate owned	96	96
Total covered nonperforming assets	1,400	1,451
Acquired covered loans	$30,708	$32,560

Recovered_Sheet3

Loans Receivable and Allowance for Loan Losses - Additional Information (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Receivables [Abstract]
Commitment to lend	$1,332,000		$1,573,000
Recognized provision for credit losses related to unfunded commitments	-240,000	41,000
Positive or Negative Qualitative Adjustment of the Loss Migration Ratio or Individual Specific Reserve Allocations, In Basis Points	0.50%
Due from Related Parties	$3,600,000		$3,700,000

Borrowings_Maturities_of_FHLB_

Borrowings - Maturities of FHLB Borrowings (Details) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified
Contractual Maturities
Extinguishment of Debt [Line Items]
Due within one year	$50,000
Due after one year through five years	430,881
Total	480,881
Maturity/Put Date
Extinguishment of Debt [Line Items]
Due within one year	70,881
Due after one year through five years	410,000
Total	$480,881

Borrowings_Narrative_Details

Borrowings - Narrative (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Percent of assets	30.00%
Maximum borrowing capacity	$2,220,000,000	$2,170,000,000
Percent outstanding advances	100.00%
Borrowings	480,881,000	480,975,000
Weighted average interest rate	1.09%	1.09%
Interest rate, range minimum	0.47%
Interest rate, range maximum	3.67%
Unused funds	1,740,000,000
Percent of qualifying assets	95.00%
Mortgage Loans on Real Estate
Debt Instrument [Line Items]
Pledged as collateral	2,950,000,000	2,890,000,000
Securities Investment
Debt Instrument [Line Items]
Asset balance used to determine maximum borrowing capacity from federal reserve bank	1,400,000
Amount outstanding	0	0
Qualifying Loans
Debt Instrument [Line Items]
Asset balance used to determine maximum borrowing capacity from federal reserve bank	624,900,000
Putable
Debt Instrument [Line Items]
Borrowings	$20,900,000	$21,000,000

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
	Rate
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fixed Interest Rate	4.35%
Derivative, Variable Interest Rate	2.50%
Derivative, Fair Value, Net	$2,764
Derivative Liability, Notional Amount	79,662
Derivative, Average Remaining Maturity	7 years 3 months 18 days
Derivative, Name [Domain]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	-2,764
Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	$79,662

Subordinated_Debentures_Summar

Subordinated Debentures - Summary of Trust Preferred Securities and Debentures (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures Amount	$42,199,000		$42,158,000
Nara Capital Trust III
Subordinated Borrowing [Line Items]
Initial Rate	3.42%
Debt Instrument, Interest Rate, Effective Percentage	3.42%
Nara Statutory Trust IV
Subordinated Borrowing [Line Items]
Initial Rate	3.10%
Debt Instrument, Interest Rate, Effective Percentage	3.10%
Nara Statutory Trust V
Subordinated Borrowing [Line Items]
Initial Rate	3.22%
Debt Instrument, Interest Rate, Effective Percentage	3.22%
Nara Statutory Trust VI
Subordinated Borrowing [Line Items]
Initial Rate	1.92%
Debt Instrument, Interest Rate, Effective Percentage	1.92%
Center Capital Trust I
Subordinated Borrowing [Line Items]
Initial Rate	3.10%	[1]
Debt Instrument, Interest Rate, Effective Percentage	5.56%	[1]
Unamortized discount	5,300,000
Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	46,000,000
Trust Preferred Security Amount | Nara Capital Trust III
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	5,000,000
Trust Preferred Security Amount | Nara Statutory Trust IV
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	5,000,000
Trust Preferred Security Amount | Nara Statutory Trust V
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	10,000,000
Trust Preferred Security Amount | Nara Statutory Trust VI
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	8,000,000
Trust Preferred Security Amount | Center Capital Trust I
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	18,000,000	[1]
Subordinated Debentures Amount
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures Amount	42,199,000
Subordinated Debentures Amount | Nara Capital Trust III
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures Amount	5,155,000
Subordinated Debentures Amount | Nara Statutory Trust IV
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures Amount	5,155,000
Subordinated Debentures Amount | Nara Statutory Trust V
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures Amount	10,310,000
Subordinated Debentures Amount | Nara Statutory Trust VI
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures Amount	8,248,000
Subordinated Debentures Amount | Center Capital Trust I
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures Amount	$13,331,000	[1]
[1]	The Center Capital Trust I trust preferred security has a remaining discount of $5.3 million at March 31, 2015. The effective rate of the security includes the effect

Subordinated_Debentures_Narrat

Subordinated Debentures - Narrative (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Subordinated Borrowing [Line Items]
Right to defer consecutive payments of interest, maximum term	5 years
Other assets
Subordinated Borrowing [Line Items]
Investment in common trust securities	1,500,000	$1,600,000
Trust Preferred Securities Subject to Mandatory Redemption
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	46,000,000
Percent included in tier one capital, maximum	25.00%
Excess of percent threshold included in tier two capital	25.00%
Tier one risk based capital	40,800,000

Intangible_Assets_Intangible_A

Intangible Assets - Intangible Assets (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Goodwill	$105,401,000		$105,401,000
Goodwill impairment	0	0
Gross Carrying Amount	7,466,000
Accumulated Amortization	-3,846,000
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization expense related to core deposit intangible qssets	267,000	324,000
Center Financial Corporation | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization period	7 years
Gross Carrying Amount	4,100,000
Accumulated Amortization	-2,828,000
Pacific International Bancorp, Inc. | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization period	7 years
Gross Carrying Amount	603,000
Accumulated Amortization	-297,000
Foster Bankshares Inc | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization period	10 years
Gross Carrying Amount	2,763,000
Accumulated Amortization	($721,000)
Minimum | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization period	7 years
Maximum | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization period	10 years

Intangible_Assets_Servicing_As

Intangible Assets - Servicing Assets (Details) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of period	$10,341	$8,915	8,915
Additions through originations of servicing assets	1,045	815
Amortization	-857	-607
Balance at end of period	$10,529	$9,123
Minimum
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Weighted-average discount rate	5.47%		5.49%
Constant prepayment rate	8.90%		9.20%
Maximum
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Weighted-average discount rate	5.73%		5.73%
Constant prepayment rate	12.50%		13.00%

Income_Taxes_Details

Income Taxes (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$1,800,000	$1,800,000
Interest and penalties accrued	$110,000	$96,000

Fair_Value_Measurements_Assets

Fair Value Measurements - Assets and Liabilities Measured at Fair Value, Recurring (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Assets:
Securities available for sale, at fair value	$812,372	$796,523
GSE collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	329,303	302,774
GSE mortgage-backed securities
Assets:
Securities available for sale, at fair value	447,313	465,489
Trust preferred securities
Assets:
Securities available for sale, at fair value	3,956	3,987
Municipal bonds
Assets:
Securities available for sale, at fair value	14,333	6,930
Mutual funds
Assets:
Securities available for sale, at fair value	17,467	17,343
Recurring basis | Estimate of Fair Value | GSE collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	329,303	302,774
Recurring basis | Estimate of Fair Value | GSE mortgage-backed securities
Assets:
Securities available for sale, at fair value	447,313	465,489
Recurring basis | Estimate of Fair Value | Trust preferred securities
Assets:
Securities available for sale, at fair value	3,956	3,987
Recurring basis | Estimate of Fair Value | Municipal bonds
Assets:
Securities available for sale, at fair value	14,333	6,930
Recurring basis | Estimate of Fair Value | Mutual funds
Assets:
Securities available for sale, at fair value	17,467	17,343
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | GSE collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | GSE mortgage-backed securities
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Trust preferred securities
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal bonds
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual funds
Assets:
Securities available for sale, at fair value	17,467	17,343
Recurring basis | Significant Other Observable Inputs (Level 2) | GSE collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	329,303	302,774
Recurring basis | Significant Other Observable Inputs (Level 2) | GSE mortgage-backed securities
Assets:
Securities available for sale, at fair value	447,313	465,489
Recurring basis | Significant Other Observable Inputs (Level 2) | Trust preferred securities
Assets:
Securities available for sale, at fair value	3,956	3,987
Recurring basis | Significant Other Observable Inputs (Level 2) | Municipal bonds
Assets:
Securities available for sale, at fair value	13,138	5,752
Recurring basis | Significant Other Observable Inputs (Level 2) | Mutual funds
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | GSE collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | GSE mortgage-backed securities
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Trust preferred securities
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Municipal bonds
Assets:
Securities available for sale, at fair value	1,195	1,178
Recurring basis | Significant Unobservable Inputs (Level 3) | Mutual funds
Assets:
Securities available for sale, at fair value	$0	$0

Fair_Value_Measurements_Rollfo

Fair Value Measurements - Rollforward of Level 3 Assets (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Amortization	$0	$0
Total gains or (losses) included in earnings	0	0
Municipal bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	1,178	1,112
Purchases, issuances, and settlements	0	0
Total gains included in other comprehensive income	17	20
Ending Balance	$1,195	$1,132

Fair_Value_Measurements_Assets1

Fair Value Measurements - Assets Measured at Fair Value, Non-Recurring (Details) (Non-recurring basis, USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Estimate of Fair Value | Impaired loans at fair value - Real estate loans
Assets:
Assets	$37,813	$43,708
Estimate of Fair Value | Impaired loans at fair value - Commercial business
Assets:
Assets	5,545	4,114
Estimate of Fair Value | Impaired loans at fair value - Trade finance
Assets:
Assets	1,654
Estimate of Fair Value | Impaired loans at fair value - Consumer
Assets:
Assets	584
Estimate of Fair Value | Loans held for sale, net
Assets:
Assets	1,554	2,000
Estimate of Fair Value | OREO
Assets:
Assets	3,065	17,985
Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired loans at fair value - Real estate loans
Assets:
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired loans at fair value - Commercial business
Assets:
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired loans at fair value - Trade finance
Assets:
Assets	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired loans at fair value - Consumer
Assets:
Assets	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Loans held for sale, net
Assets:
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | OREO
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | Impaired loans at fair value - Real estate loans
Assets:
Assets	37,813	43,708
Significant Other Observable Inputs (Level 2) | Impaired loans at fair value - Commercial business
Assets:
Assets	5,545	4,114
Significant Other Observable Inputs (Level 2) | Impaired loans at fair value - Trade finance
Assets:
Assets	1,654
Significant Other Observable Inputs (Level 2) | Impaired loans at fair value - Consumer
Assets:
Assets	584
Significant Other Observable Inputs (Level 2) | Loans held for sale, net
Assets:
Assets	1,554	2,000
Significant Other Observable Inputs (Level 2) | OREO
Assets:
Assets	3,065	17,985
Significant Unobservable Inputs (Level 3) | Impaired loans at fair value - Real estate loans
Assets:
Assets	0	0
Significant Unobservable Inputs (Level 3) | Impaired loans at fair value - Commercial business
Assets:
Assets	0	0
Significant Unobservable Inputs (Level 3) | Impaired loans at fair value - Trade finance
Assets:
Assets	0
Significant Unobservable Inputs (Level 3) | Impaired loans at fair value - Consumer
Assets:
Assets	0
Significant Unobservable Inputs (Level 3) | Loans held for sale, net
Assets:
Assets	0	0
Significant Unobservable Inputs (Level 3) | OREO
Assets:
Assets	$0	$0

Fair_Value_Measurements_Total_

Fair Value Measurements - Total Net Gains Losses on Assets Measured at Fair Value on a Non-Recurring Basis (Details) (Non-recurring basis, Change during period, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Impaired loans at fair value - Real estate loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	$534	$1,704
Impaired loans at fair value - Commercial business
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	1,274	-10,715
Impaired loans at fair value - Trade finance
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	-310	-659
Impaired loans at fair value - Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	-12	-46
Loans held for sale, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	182	0
OREO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	($425)	($11)

Fair_Value_Measurements_Carryi

Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Level 1 | Carrying Amount
Financial Assets:
Cash and cash equivalents	$429,871	$462,160
Level 1 | Estimated Fair Value
Financial Assets:
Cash and cash equivalents	429,871	462,160
Level 2 | Carrying Amount
Financial Assets:
Loans held for sale	26,432	28,311
Customers' liabilities on acceptances	1,029	1,889
Financial Liabilities:
Noninterest-bearing deposits	1,616,935	1,543,018
Saving and other interest bearing demand deposits	1,785,990	1,862,060
Time deposits	2,400,329	2,288,374
FHLB advances	480,881	480,975
Subordinated debentures	42,199	42,158
Bank's liabilities on acceptances outstanding	1,029	1,889
Level 2 | Estimated Fair Value
Financial Assets:
Loans held for sale	27,676	29,626
Customers' liabilities on acceptances	1,029	1,889
Financial Liabilities:
Noninterest-bearing deposits	1,616,935	1,543,018
Saving and other interest bearing demand deposits	1,785,990	1,862,060
Time deposits	2,404,910	2,292,831
FHLB advances	483,574	481,290
Subordinated debentures	43,970	43,987
Bank's liabilities on acceptances outstanding	1,029	1,889
Level 3 | Carrying Amount
Financial Assets:
Loans receivable - net	5,641,045	5,497,434
Level 3 | Estimated Fair Value
Financial Assets:
Loans receivable - net	$5,998,374	$5,826,924

Stockholders_Equity_Discussion

Stockholders' Equity - Discussion of Warrants (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014
Class of Warrant or Right [Line Items]
Dividend declared (in dollars per share)	$0.10	$0.08
Common Stock
Class of Warrant or Right [Line Items]
Potential repurchase	349,016
Maximum number of shares callable by warrants	18,883

Stockholders_Equity_Stockholde

Stockholders' Equity - Stockholders’ Equity (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Accumulated other comprehensive income (loss)	$4,488	$1,705
Securities (Assets)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Accumulated other comprehensive income (loss)	4,409	1,631
Accumulated Unrealized Gain (Losses) on Interest Only Strips
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Accumulated other comprehensive income (loss)	$79	$74

Regulatory_Matters_Details

Regulatory Matters (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Company
Total capital (to risk-weighted assets), Amount
Total Capital, Actual	$900,301,000	$881,794,000
Total Capital, Required For Capital Adequacy Purposes	495,568,000	476,490,000
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Actual (Risk Based)	829,375,000	812,464,000
Tier I Capital, Required For Capital Adequacy Purposes	371,676,000	238,245,000
Tier I capital (to average assets), Amount
Tier I Capital, Actual (Leverage)	829,375,000	812,464,000
Tier I Capital, Required For Capital Adequacy Purposes	282,116,000	279,709,000
Total capital and Tier I capital (to risk-weighted assets), Ratio
Total Capital (to Risk Weighted Assets), Actual	14.53%	14.80%
Total Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes	8.00%	8.00%
Tier I Capital (to Risk Weighted Assets), Actual (Risk Based)	13.39%	13.64%
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	6.00%	4.00%
Tier I capital (to average assets), Ratio
Tier I Capital (to Average Assets), Actual (Leverage)	11.76%	11.62%
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage)	4.00%	4.00%
Bank
Total capital (to risk-weighted assets), Amount
Total Capital, Actual	888,680,000	869,343,000
Total Capital, Required For Capital Adequacy Purposes	495,132,000	476,101,000
Required To Be Well Capitalized under Prompt Corrective Action Provisions	618,916,000	595,126,000
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Actual (Risk Based)	817,754,000	800,013,000
Tier I Capital, Required For Capital Adequacy Purposes	371,349,000	238,050,000
Tier I Capital, Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	495,132,000	357,076,000
Tier I capital (to average assets), Amount
Tier I Capital, Actual (Leverage)	817,754,000	800,013,000
Tier I Capital, Required For Capital Adequacy Purposes	281,961,000	279,585,000
Tier I Capital, Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Leverage)	352,451,000	349,481,000
Total capital and Tier I capital (to risk-weighted assets), Ratio
Total Capital (to Risk Weighted Assets), Actual	14.36%	14.61%
Total Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes	8.00%	8.00%
Total Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions	10.00%	10.00%
Tier I Capital (to Risk Weighted Assets), Actual (Risk Based)	13.21%	13.44%
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	6.00%	4.00%
Tier I Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	8.00%	6.00%
Tier I capital (to average assets), Ratio
Tier I Capital (to Average Assets), Actual (Leverage)	11.60%	11.45%
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage)	4.00%	4.00%
Tier I Capital (to Average Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Leverage)	5.00%	5.00%
Common equity tier 1 capital [Member] | Company
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Actual (Risk Based)	788,601,000
Common Equity Tier 1 [Member] | Company
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Required For Capital Adequacy Purposes	278,757,000
Total capital and Tier I capital (to risk-weighted assets), Ratio
Tier I Capital (to Risk Weighted Assets), Actual (Risk Based)	12.73%
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	4.50%
Common Equity Tier 1 [Member] | Bank
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Actual (Risk Based)	817,754,000
Tier I Capital, Required For Capital Adequacy Purposes	278,511,975
Tier I Capital, Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	$402,295,075
Total capital and Tier I capital (to risk-weighted assets), Ratio
Tier I Capital (to Risk Weighted Assets), Actual (Risk Based)	13.21%
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	4.50%
Tier I Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	6.50%