Wilshire Bancorp (WIBC) 10-Q 1 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 27, 2015
Document and Entity Information
Entity Registrant Name	WILSHIRE BANCORP INC
Entity Central Index Key	1285224
Document Type	10-Q
Document Period End Date	31-Mar-15
Amendment Flag	FALSE
Current Fiscal Year End Date	-19
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		78,449,525
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1

CONSOLIDATED_STATEMENTS_OF_FIN

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
ASSETS:
Cash and due from banks	$353,438	$233,699
Federal funds sold and other cash equivalents	164	254
Cash and cash equivalents	353,602	233,953
Deposits held in other financial institutions	8,000	8,000
Securities available-for-sale, at fair value (amortized cost of $323 million and $384 million at March 31, 2015 and December 31, 2014, respectively)	329,343	388,367
Securities held-to-maturity, at amortized cost (fair value of $26 thousand and $28 thousand at March 31, 2015 and December 31, 2014, respectively)	25	26
Loans receivable (net of allowance for loan losses of $48 million and $49 million at March 31, 2015 and December 31, 2014, respectively)	3,464,650	3,259,673
Loans held-for-sale, at the lower of cost or market	10,204	11,783
Federal Home Loan Bank ("FHLB") stock, at cost	16,539	16,539
Other real estate owned ("OREO")	7,411	7,922
Due from customers on acceptances	6,472	5,611
Cash surrender value of bank owned life insurance	23,470	23,330
Investments in affordable housing partnerships	43,134	44,077
Bank premises and equipment	14,058	13,881
Accrued interest receivable	8,581	8,792
Deferred income taxes	16,646	22,271
Servicing assets	19,813	18,031
Goodwill	67,473	67,473
Core deposits intangibles	3,912	4,155
Other assets	19,945	21,585
TOTAL	4,413,278	4,155,469
Deposits:
Non-interest bearing	997,803	915,413
Interest bearing:
Savings	130,645	128,943
Money market and NOW accounts	916,681	797,666
Time deposits of $100,000 or more	1,322,743	1,291,844
Other time deposits	267,294	267,393
Total deposits	3,635,166	3,401,259
FHLB advances	150,000	150,000
Junior subordinated debentures	71,837	71,779
Commitments to fund low income tax credit housing investments	8,844	9,430
Accrued interest payable	2,406	2,228
Bank acceptances outstanding	6,472	5,611
Other liabilities	32,974	25,751
Total liabilities	3,907,699	3,666,058
SHAREHOLDERS' EQUITY:
Preferred stock, $1,000 par value - authorized, 5,000,000 shares; issued and outstanding 0 shares at March 31, 2015 and December 31, 2014
Common stock, no par value - authorized, 200,000,000 shares; issued and outstanding, 78,329,458 and 78,322,482 shares at March 31, 2015 and December 31, 2014, respectively	232,207	232,001
Accumulated other comprehensive income, net of tax	5,712	4,453
Retained earnings	267,660	252,957
Total shareholders' equity	505,579	489,411
TOTAL	$4,413,278	$4,155,469

CONSOLIDATED_STATEMENTS_OF_FIN1

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION
Securities available-for-sale, at fair value, amortized cost (in dollars)	$323,000,000	$384,000,000
Securities held-to-maturity, at amortized cost, fair value (in dollars)	26,000	28,000
Loans receivable, allowance for loan losses (in dollars)	$48,170,000	$48,624,000
Preferred stock, par value (in dollars per share)	$1,000	$1,000
Preferred stock, authorized shares	5,000,000	5,000,000
Preferred stock, issued shares	0	0
Preferred stock, outstanding shares	0	0
Common stock, par value (in dollars per share)	$0	$0
Common stock, authorized shares	200,000,000	200,000,000
Common stock, issued shares	78,329,458	78,322,482
Common stock, outstanding shares	78,329,458	78,322,462

CONSOLIDATED_STATEMENTS_OF_INC

CONSOLIDATED STATEMENTS OF INCOME (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
INTEREST INCOME:
Interest and fees on loans	$40,088	$37,101
Interest on investment securities	1,968	2,101
Interest on federal funds sold and other earning assets	192	151
Total interest income	42,248	39,353
INTEREST EXPENSE:
Interest on deposits	5,097	3,676
Interest on FHLB advances and other borrowings	232	74
Interest on junior subordinated debentures	428	430
Total interest expense	5,757	4,180
NET INTEREST INCOME BEFORE PROVISION FOR LOSSES ON LOANS AND LOAN COMMITMENTS	36,491	35,173
NET INTEREST INCOME AFTER PROVISION FOR LOSSES ON LOANS AND LOAN COMMITMENTS	36,491	35,173
NON-INTEREST INCOME:
Service charges on deposit accounts	3,107	3,146
Net gain on sale of loans	6,806	4,329
Loan-related servicing fees	3,148	2,156
Net increase in fair value of derivatives	495
Other income	1,711	1,355
Total non-interest income	15,267	10,986
NON-INTEREST EXPENSES:
Salaries and employee benefits	12,665	12,655
Occupancy and equipment	3,373	3,309
Regulatory assessment fee	599	508
Loss on investments in affordable housing partnerships	943	857
Data processing	1,042	963
Professional fees	775	696
Amortization of core-deposit intangibles	243	233
Merger related costs		3,364
Other operating expenses	3,269	3,672
Total non-interest expense	22,909	26,257
INCOME BEFORE INCOME TAXES	28,849	19,902
INCOME TAX PROVISION	10,230	6,789
NET INCOME	$18,619	$13,113
EARNINGS PER COMMON SHARE INFORMATION:
Basic (in dollars per share)	$0.24	$0.17
Diluted (in dollars per share)	$0.24	$0.17
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	78,326,505	78,115,779
Diluted (in shares)	78,655,365	78,496,106

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
NET INCOME	$18,619	$13,113
UNREALIZED GAIN ON SECURITIES AVAILABLE-FOR-SALE SECURITIES:
Unrealized gains on securities available-for-sale arising during the period	2,148	3,122
Unrealized gains on securities available-for-sale	2,148	3,122
Less income tax expense	903	1,311
Net change in net unrealized gains on securities available-for-sale	1,245	1,811
UNREALIZED GAIN (LOSS) ON INTEREST-ONLY STRIP:
Net unrealized gains (losses) on interest-only strips arising during the period	2	-19
Less income tax expense (benefit)	1	-8
Net unrealized changes in net gains on interest-only strips	1	-11
BOLI UNRECOGNIZED PRIOR SERVICE COST:
BOLI unrecognized prior service cost	13	13
Net changes to BOLI unrecognized prior service cost	13	13
TOTAL OTHER COMPREHENSIVE INCOME	1,259	1,813
TOTAL COMPREHENSIVE INCOME	$19,878	$14,926

CONSOLIDATED_STATEMENTS_OF_SHA

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $)	Common Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Total
In Thousands, except Share data, unless otherwise specified
BALANCE at Dec. 31, 2013	$229,836	($23)	$209,605	$439,418
BALANCE (in shares) at Dec. 31, 2013	78,061,307
Increase (Decrease) in Shareholders' Equity
Stock options exercised	461			461
Stock options exercised (in shares)	113,769
Restricted stock granted (in shares)	71,950
Cash dividend declared or accrued:
Common stock ($0.05 per Share)			-3,912	-3,912
Share-based compensation expense	433			433
Tax benefit from stock options exercised	249			249
Comprehensive income:
Net income			13,113	13,113
Other comprehensive income		1,813		1,813
BALANCE at Mar. 31, 2014	230,979	1,790	218,806	451,575
BALANCE (in shares) at Mar. 31, 2014	78,247,026
BALANCE at Dec. 31, 2014	232,001	4,453	252,957	489,411
BALANCE (in shares) at Dec. 31, 2014	78,322,462
Increase (Decrease) in Shareholders' Equity
Stock options exercised	45			45
Stock options exercised (in shares)	6,996
Cash dividend declared or accrued:
Common stock ($0.05 per Share)			-3,915	-3,915
Share-based compensation expense	161			161
Stock dividend related to restricted stock			-1	-1
Comprehensive income:
Net income			18,619	18,619
Other comprehensive income		1,259		1,259
BALANCE at Mar. 31, 2015	$232,207	$5,712	$267,660	$505,579
BALANCE (in shares) at Mar. 31, 2015	78,329,458

CONSOLIDATED_STATEMENTS_OF_SHA1

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
Common stock cash dividend declared or accrued (in dollars per share)	$0.05	$0.05

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$18,619	$13,113
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of investment securities	384	467
Depreciation of bank premises and equipment	1,047	907
Accretion of discount on acquired loans	-2,061	-2,815
Amortization and accretion of liabilities acquired from acquisitions	18	-386
Amortization of core deposits intangibles	243	233
Provision for losses on other real estate owned	159	11
Deferred tax expense	4,733	3,990
Gain on disposition of bank premises and equipment	14
Net realized gain on sale of loans	-6,806	-4,329
Proceeds from sale of loans held-for-sale	48,455	50,345
Origination of loans held-for-sale	-40,070	-28,153
Change in unrealized appreciation on servicing assets	-954	-563
Disposition of servicing rights	106	431
Net realized loss on sale of other real estate owned		1
Gain on sale of repossessed assets		-20
Share-based compensation expense	161	433
Change in cash surrender value of life insurance	397	-142
Servicing assets capitalized	-933	-1,297
Decrease in accrued interest receivable	211	57
Loss on investments in affordable housing partnerships	943	857
Increase in fair value of derivatives	-495
Decrease (increase) in other assets	281	-1,192
FHLB stock cash dividend	306	279
Increase in accrued interest payable	178	44
Increase (decrease) in other liabilities	10,115	-7,392
Net cash provided by operating activities	35,051	24,879
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from principal repayment of securities held-to-maturity	1	3
Proceeds from principal repayment of securities available-for-sale	60,789	12,655
Net decrease in interest-bearing deposits in other financial institutions		13
Net increase in loans receivable	-203,905	-52,656
(Payment) receipt of FDIC loss-share indemnification	-1,657	2,415
Proceeds from sale of other loans	991	700
Proceeds from sale of other real estate owned	35	409
Proceeds from sale of repossessed assets		84
Purchases of investments in affordable housing partnerships	-587	-746
Purchases of bank premises and equipment	-568	-177
Purchases of bank owned life insurance	-538
Net cash used in investing activities	-145,439	-37,300
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from stock options exercised	45	461
Tax benefit from exercise of stock options		249
Payment of cash dividend on common stock	-3,915	-2,342
Repayment of FHLB advances		-40,000
Net increase in deposits	233,907	51,699
Net cash provided by financing activities	230,037	10,067
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	119,649	-2,354
CASH AND CASH EQUIVALENTS - BEGINNING OF PERIOD	233,953	170,654
CASH AND CASH EQUIVALENTS - END OF PERIOD	353,602	168,300
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest paid	5,578	4,136
Income taxes paid	394	4,922
Income tax refunds received		6
SUPPLEMENTAL SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Real estate acquired through foreclosures		1,779
Loans transferred to loans receivable from held-for-sale	991	1,203
Other assets transferred to bank premises and equipment	670	182
Common stock cash dividend declared, but not paid	$3,918	$3,912

Business_of_Wilshire_Bancorp_I

Business of Wilshire Bancorp, Inc.	3 Months Ended
	Mar. 31, 2015
Business of Wilshire Bancorp, Inc.
Business of Wilshire Bancorp, Inc.
	Note 1.    Business of Wilshire Bancorp, Inc.
	Wilshire Bancorp, Inc. (hereafter, “the Company,” “we,” “us,” or “our”) is a bank holding company offering a broad range of financial products and services primarily through our main subsidiary, Wilshire Bank, a California state-chartered commercial bank, which we sometimes refer to in this report as “the Bank.” Our corporate headquarters and primary banking facilities are located at 3200 Wilshire Boulevard, Los Angeles, California 90010. The Bank has 34 full-service branch offices in Southern California, Texas, Georgia, New Jersey, and the greater New York City metropolitan area. We also have seven loan production offices, or “LPOs”, of which four are utilized primarily for the origination of loans under our Small Business Administration, or “SBA”, lending program and located in California, Colorado, Georgia, and Washington, and three that are utilized primarily for the origination of residential mortgage loans located in California.

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2015
Basis of Presentation
Basis of Presentation
	Note 2.    Basis of Presentation
	The unaudited consolidated financial statements of the Company have been prepared in accordance with the Securities and Exchange Commission (“SEC”) rules and regulations for interim financial reporting and therefore do not necessarily include all information and footnote disclosures normally included in annual financial statements prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”). The information provided by these interim financial statements reflects all adjustments which are, in the opinion of management, necessary for a fair presentation of the Company’s consolidated statements of financial condition as of March 31, 2015 and December 31, 2014, consolidated statements of income, consolidated statements of comprehensive income, consolidated statements of shareholders’ equity, and consolidated statements of cash flows for the three months ended March 31, 2015 and March 31, 2014. Operating results for interim periods are not necessarily indicative of operating results for an entire fiscal year.
	The unaudited financial statements should be read in conjunction with the audited financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014. The accounting policies used in the preparation of these interim financial statements were consistent with those used in the preparation of the financial statements for the year ended December 31, 2014.

Recent_Acquisitions

Recent Acquisitions	3 Months Ended
	Mar. 31, 2015
Recent Acquisitions
Recent Acquisitions
	Note 3.    Recent Acquisitions
	During the first quarter of 2015, the Bank purchased certain assets and partially assumed the operations of Bank of Manhattan’s Mortgage Lending Division (“Mortgage Division).  The Mortgage Division was first formed in 2010 and offers conforming, super-conforming, and jumbo residential, and other mortgage production. The Bank acquired certain assets and liabilities associated with the Mortgage Division and hired approximately 30 employees from the Mortgage Department, consisting of loan managers, loan officers, and operations personnel. In connection with the acquisition, the Bank entered into a sublease agreement with Bank of Manhattan to operate from one of the Mortgage Division’s locations in Southern California. The Mortgage Division has been integrated into the Bank’s existing Mortgage Department, substantially increasing the Bank’s mortgage lending origination platform.
	The acquisition was accounted for in accordance with ASC 805 “Business Combinations,” using the acquisition method of accounting and was recorded at estimated fair value on the date of the transaction. The transaction only resulted in the acquisition of fixed assets associated with the three locations that will be operated by the Bank. There were no loans or loan commitments acquired in the transaction. The total purchase price paid to Bank of Manhattan for the transaction was $20,000.

Fair_Value_Measurement_for_Fin

Fair Value Measurement for Financial and Non-Financial Assets and Liabilities	3 Months Ended
	Mar. 31, 2015
Fair Value Measurement for Financial and Non-Financial Assets and Liabilities
Fair Value Measurement for Financial and Non-Financial Assets and Liabilities
	Note 4.    Fair Value Measurement for Financial and Non-Financial Assets and Liabilities
	Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value inputs of the instruments are classified and disclosed in one of the following three categories pursuant to ASC 820:
	Level 1 — Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. The quoted price shall not be adjusted for any type of blockage factor (i.e., size of the position relative to trading volume).
	Level 2 — Pricing inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. Fair value is determined through the use of models or other valuation methodologies, including the use of pricing matrices. If the asset or liability has a specified (contractual) term, a Level 2 input must be observable for substantially the full term of the asset or liability.
	Level 3 — Pricing inputs are inputs unobservable for the asset or liability. Unobservable inputs shall be used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at the measurement date. The inputs into the determination of fair value require significant management judgment or estimation.
	In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an asset’s or liability’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.
	The Company uses the following methods and assumptions in estimating our fair value disclosures for financial instruments. Financial assets and liabilities recorded at fair value on a recurring and non-recurring basis are listed as follows:
	Cash and cash equivalents — The carrying value of our cash and cash equivalents is approximately equal to the fair value resulting in a Level 1 classification.
	Federal funds sold — The carrying value of federal funds sold is approximately equal to the fair value resulting in a Level 1 classification.
	Deposits held in other financial institutions — The carrying value of deposits held at other financial institutions is approximately equal to the fair value resulting in a Level 1 classification.
	Investment securities — Investments securities are recorded at fair value pursuant to ASC 320-10 “Investments - Debt and Equity Securities.” Fair value measurements are based upon quoted prices for similar assets, if available (Level 1). If quoted prices are not available, fair values are measured using matrix pricing models, or other model-based valuation techniques requiring observable inputs such as yield curves, prepayment speeds, and default rates (Level 2). Our existing investment security holdings as of March 31, 2015 are measured using matrix pricing models in lieu of direct price quotes and is recorded based on recurring Level 2 measurement inputs. Level 3 measurement inputs are not utilized to measure the fair value for any of our investment securities.
	Loans — The fair value of variable rate loans that have no significant changes in credit risk are based on the carrying values. The fair values of other loans are estimated by discounting the future cash flows using current rates at which similar loans would be made to borrowers with similar risk characteristics. The aforementioned fair value techniques result in a Level 3 classification. See below for impaired loans.
	Loans held-for-sale — SBA loans and mortgage loans that are held-for-sale are reported at the lower of cost or fair value. Fair value is determined based on quotes, bids, or indications directly from potential purchasing parties. We record SBA and mortgage loans held-for-sale as non-recurring Level 2 measurement inputs.
	Impaired loans — At the time a loan is considered impaired, it is valued at the lower of cost or fair value. Impaired loans that are carried at fair value generally having had a charge-off through the allowance for loan losses or a specific valuation allowance. The fair value of impaired loans that are not collateral dependent is measured based on the present value of estimated cash flows. For collateral dependent loans, the fair value is commonly based on recent real estate appraisals of the underlying collateral. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process to adjust for differences between the comparable sales and income data available. Such adjustments may be significant and typically result in a Level 3 classification of the inputs for determining fair value. Non-real estate collateral may also be valued using an appraisal, net book value per the borrower’s financial statements or aging reports, adjusted or discounted based on management’s historical knowledge, based on changes in market conditions from the time of the valuation, and management’s expertise and knowledge of the client and client’s business resulting in a Level 3 fair value classification. Impaired loans are evaluated on a quarterly basis for additional impairment and are adjustments are recorded accordingly.
	Indications of value for both collateral-dependent impaired loans and other real estate owned are obtained from third party providers or estimated internally by the Company’s internal Appraisal Department. All indications of value are reviewed for reasonableness by a member of the Appraisal Department who reviews the assumptions and approaches utilized in the appraisal. The resulting fair value is then compared with independent data sources such as recent market data or industry-wide statistics.
	Other real estate owned (“OREO”) — OREO are measured at fair value less estimated costs to sell when acquired, establishing a new cost basis. Fair value is commonly based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process to adjust for differences between the comparable sales and income data available. The Company records OREO as non-recurring with Level 3 measurement inputs.
	Servicing assets — SBA and residential real estate loan servicing assets represent the value associated with servicing SBA and residential real estate loans that have been sold. The fair value for servicing assets is determined through discounted cash flow analysis and utilizes discount rates, prepayment speeds, and delinquency rate assumptions as inputs. All of these assumptions require a significant degree of management estimation and judgment. The fair market valuation is performed on a quarterly basis for servicing assets. The Company classifies loan servicing assets as recurring with Level 3 measurement inputs.
	FHLB stock — It is not practical to determine the fair value of FHLB stock due to the restrictions placed on the stock’s transferability.
	Accrued interest receivable — The carrying amount of accrued interest receivable approximates its fair value due to the short-term nature of this asset resulting in a Level 2/Level 3 classification which is consistent with its underlying asset.
	FDIC loss-share indemnification asset — The fair value of the Federal Deposit Insurance Corporation (“FDIC”) loss-share indemnification asset was estimated by discounting the estimated future cash flows using current market rates for financial instruments with similar characteristics resulted in a Level 3 classification. With the expiration of the loss-share agreement with the FDIC in June, 2014, the Company no longer has a FDIC indemnification asset balance.
	Due from customers on acceptances and acceptances outstanding — The carrying value of due from customers on acceptances and acceptances outstanding are approximately equal to the fair value resulting in a Level 1 classification.
	Mortgage banking derivatives —Mortgage banking derivative instruments consist of interest rate lock commitments and forward sale contracts that trade in liquid markets. The fair value is based on the prices available from third party investors. Due to the observable nature of the inputs used in deriving the fair value, the valuation of mortgage banking derivatives are classified as Level 2.
	Non-interest bearings deposits — The carrying value of our non-interest bearings deposits is approximately equal to the fair value resulting in a Level 1 classification.
	Interest bearings deposits — The fair value of money market and savings accounts is estimated to be the amount that is payable on demand as of the reporting date resulting in Level 2 classification. Fair value for fixed-rate time deposits is estimated using a discounted cash flow analysis which utilizes current interest rates offered on deposits of similar maturities resulting in a Level 2 classification.
	Junior subordinated debentures — The fair value for junior subordinated debentures is derived from a discounted cash flow analysis based on current rates that are given for securities with similar risk characteristics, resulting in a Level 2 classification.
	Short-term Federal Home Loan Bank advances — The carrying value of our short-term FHLB advances is approximately equal to the fair value as the borrowings are usually variable rate and are renewed daily. As such, these liabilities have a Level 1 classification.
	Long-term FHLB advances — The fair value for long-term FHLB advances is derived from a discounted cash flow analysis based on current rates that are given for borrowings with similar risk characteristics, resulting in a Level 2 classification.
	Accrued interest payable — The carrying amount of accrued interest payable approximates its fair value due to the short-term nature of this liability resulting in a Level 1 or 2 classification consistent with its underlying liabilities.
	The table below summarizes the valuation measurements of our financial assets and liabilities in accordance with ASC 820-10 fair value hierarchy levels at March 31, 2015 and December 31, 2014:
	Assets and Liabilities Measured at Fair Value on a Recurring Basis
	(Dollars in Thousands)
		Fair Value Measurements Using:
	As of March 31, 2015	Total Fair			Quoted Prices in			Significant Other			Significant
		Value			Active Markets			Observable Inputs			Unobservable Inputs
					(Level 1)			(Level 2)			(Level 3)
	Investments:
	Securities of government sponsored enterprises	$	51,899		$	—		$	51,899		$	—
	Mortgage-backed securities (residential)	80,803			—			80,803			—
	Collateralized mortgage obligations (residential)	155,485			—			155,485			—
	Corporate securities	15,470			—			15,470			—
	Municipal bonds	25,686			—			25,686			—
	Servicing assets	19,813			—			—			19,813
	Mortgage banking derivative assets	557			—			557			—
	Mortgage banking derivative liabilities	(62		)	—			(62		)	—
		Fair Value Measurements Using:
	As of December 31, 2014	Total Fair			Quoted Prices in			Significant Other			Significant
		Value			Active Markets			Observable Inputs			Unobservable Inputs
					(Level 1)			(Level 2)			(Level 3)
	Investments:
	Securities of government sponsored enterprises	$	100,362		$	—		$	100,362		$	—
	Mortgage-backed securities (residential)	83,367			—			83,367			—
	Collateralized mortgage obligations (residential)	163,079			—			163,079			—
	Corporate securities	15,514			—			15,514			—
	Municipal bonds	26,045			—			26,045			—
	Servicing assets	18,031			—			—			18,031
	Financial instruments measured for fair value on a recurring basis, which were part of the asset or liability balances that were deemed to have Level 3 fair value inputs when determining valuation, are identified in the table below by category with a summary of changes in fair value for periods indicated:
	(Dollars in Thousands)	At January			Net Realized			Unrealized			Net Purchases,			Transfers In or			At March		Net Cumulative
		1, 2015			Gains in Net			Gains in Other			Sales and			Out of			31, 2015		Unrealized Loss in
					Income			Comprehensive			Settlements			Level 3					Accumulated
								Income (Loss)											Other
																			Comprehensive
																			Income (Loss)
	Servicing assets	$	18,031		$	952		$	—		$	830		$	—		$	19,813	$	—
(Dollars in Thousands)	At January			Net Realized			Unrealized			Net Purchases,			Transfers In or			At March		Net Cumulative
	1, 2014			Gains in Net			Gains in Other			Sales and			Out of			31, 2014		Unrealized Loss in
				Income			Comprehensive			Settlements			Level 3					Accumulated
							Income (Loss)											Other
																		Comprehensive
																		Income (Loss)
Servicing assets	$	16,108		$	563		$	—		$	865		$	—		$	17,536	$	—
We had no transfers of financial instruments between Level 1, 2, or 3 during the quarter ended March 31, 2015 and the year ended December 31, 2014.
At March 31, 2015, we had approximately $41.9 million in interest rate lock commitments and $32.9 million in total forward sales commitments for the future delivery of residential mortgage loans. The fair value of these mortgage banking derivatives was recorded as a derivative asset of $557,000 and a derivative liability of $62,000. Fair values were estimated based on changes in mortgage interest rates from the date of the commitments.  Changes in the fair value of mortgage banking derivatives are included in non-interest income as “net increase in fair value of derivatives”.
The following table reflects the notional amount and fair value of mortgage banking derivatives for the dates indicated:
	As of March 31, 2015						As of December 31, 2014
(Dollars in Thousands)	Notional			Fair Value			Notional			Fair Value
	Amount						Amount
Assets:
Interest rate lock commitments	$	30,479		$	449		$	—		$	—
Forward sale contracts related to mortgage banking:	17,671			108			—			—
Liabilities:
Interest rate lock commitments:	$	2,449		$	(2	)	$	—		$	—
Forward sale contracts related to mortgage banking:	15,257			(60		)	—			—
The following tables represent the aggregated balance of assets measured at fair value on a non-recurring basis at March 31, 2015 and December 31, 2014, and the total losses resulting from these fair value adjustments for the three months ended March 31, 2015 and December 31, 2014:
As of March 31, 2015
(Dollars in Thousands)	Level 1			Level 2			Level 3			Total			Net Realized
													Losses
Collateral Dependent Impaired Loans:
Commercial Real Estate	$	—		$	—		$	3,562		$	3,562		$	(569	)
OREO:
Commercial Real Estate	—			—			4,078			4,078			(874		)
Residential Real Estate	—			—			713			713			(163		)
Total	$	—		$	—		$	8,353		$	8,353		$	(1,606	)
As of December 31, 2014
(Dollars in Thousands)	Level 1			Level 2			Level 3			Total			Net Realized
													(Losses)/
													Gains
Collateral Dependent Impaired Loans:
Commercial Real Estate	$	—		$	—		$	6,563		$	6,563		$	(3,698	)
Residential Real Estate	—			—			266			266			(179		)
OREO:
Commercial Real Estate	—			—			2,770			2,770			(406		)
Total	$	—		$	—		$	9,599		$	9,599		$	(4,283	)
Quantitative information about the significant unobservable inputs (level 3) used in the fair value measurement for asset and liabilities measured on a recurring and non-recurring basis at March 31, 2015 and December 31, 2014 are presented in the tables below:
As of March 31, 2015
(Dollars in Thousands)	Fair Value			Valuation Technique		Significant Unobservable Inputs		Range *
Servicing assets	$	19,813		Discounted cash flow		Discount rate		4.0% - 9.3%
						Constant prepayment rate		7.0% - 9.1%
Collateral dependent impaired loans:
Commercial Real Estate	3,562			Sales comparison approach		Adjustment for difference between comparable sales and expected sales amounts		63.38%
OREO:
Commercial Real Estate	4,078			Sales comparison approach		Adjustment for difference between comparable sales and expected sales amounts		20.48%
Residential Real Estate	713			Sales comparison approach		Adjustment for difference between comparable sales and expected sales amounts		8.70%
As of December 31, 2014
(Dollars in Thousands)	Fair Value			Valuation Technique		Significant Unobservable Inputs		Range
Servicing assets	$	18,031		Discounted cash flow		Discount rate		4.0% - 9.3%
						Constant prepayment rate		8.8% - 9.4%
Collateral dependent impaired loans:
Commercial Real Estate	6,563			Sales Comparison Approach		Adjustment for difference between comparable sales and expected sales amounts		45.60%*
Residential Real Estate	266			Sales Comparison Approach		Adjustment for difference between comparable sales and expected sales amounts		46.80%*
OREO:
Commercial Real Estate	2,770			Sales Comparison Approach		Adjustment for difference between comparable sales and expected sales amounts		23.29%*
* Represents weighted average percentage
The fair value estimates presented herein are based on pertinent information available to management at March 31, 2015 and December 31, 2014. Although management is not aware of any factors that would significantly affect the estimated fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since that date, and therefore, current estimates of fair value may differ significantly from the amounts presented herein.
The fair value of servicing assets is measured using a discounted cash flow valuation. This method requires generating cash flow projections over multiple interest rate scenarios and discounting those cash flows at a risk adjusted rate. Increases or decreases in cash flow inputs, including changes to the discount rate and constant prepayment rate, will have a corresponding impact to the fair value of these assets.
The fair value of OREO and collateral-dependent impaired loans, including those that are held-for-sale, are based on third-party property appraisals. The majority of the appraisals utilize a single valuation approach or a combination of approaches including a market approach, where prices and other relevant information generated by market transactions involving identical or comparable properties are used to determine fair value. Appraisals may also utilize an income approach, such as the discounted cash flow method, to estimate future income and profits or cash flows. Appraisals may include an ‘as is’ sales comparison approach and an ‘upon completion’ valuation approach. Adjustments are routinely made in the appraisal process by third-party appraisers to adjust for differences between the comparable sales and income data. Adjustments also result from the consideration of relevant economic and demographic factors with the potential to affect property values. Also, prospective values are based on the market conditions which exist at the date of inspection combined with informed forecasts based on current trends in supply and demand for the property types under appraisal.
The table below is a summary of fair value estimates at March 31, 2015 and December 31, 2014, for financial instruments, as defined by ASC 825-10 “Financial Instruments”, including those financial instruments for which the Company did not elect fair value option.
			March 31, 2015						December 31, 2014
	Fair Value		Carrying			Estimated			Carrying			Estimated
(Dollars in Thousands)	Level		Amount			Fair Value			Amount			Fair Value
Assets:
Cash and cash equivalents	Level 1		$	353,438		$	353,438		$	233,699		$	233,699
Federal funds sold	Level 1		164			164			254			254
Deposits held in other financial institutions	Level 1		8,000			8,000			8,000			8,000
Investment securities available-for-sale	Level 2		329,343			329,343			388,367			388,367
Investment securities held-to-maturity	Level 2		25			26			26			28
Loans held-for-sale	Level 2		10,204			11,015			11,783			12,965
Loans receivable–net	Level 3		3,464,650			3,480,021			3,259,673			3,270,398
Federal Home Loan Bank stock	N/A		16,539			N/A			16,539			N/A
Accrued interest receivable	Level 2/3		8,581			8,581			8,792			8,792
Mortgage banking derivatives	Level 2		557			557			—			—
Due from customers on acceptances	Level 1		6,472			6,472			5,611			5,611
Liabilities:
Non-interest bearing deposits	Level 1		$	997,803		$	997,803		$	915,413		$	915,413
Interest bearing deposits	Level 2		2,637,363			2,611,959			2,485,846			2,454,488
Junior subordinated debentures	Level 2		71,837			66,464			71,779			65,834
Short-term FHLB advances	Level 1		100,000			100,000			100,000			100,000
Long-term FHLB advances	Level 2		50,000			49,394			50,000			48,698
Accrued interest payable	Level 1/2		2,406			2,406			2,228			2,228
Mortgage banking derivatives	Level 2		62			62			—			—
Acceptances outstanding	Level 1		6,472			6,472			5,611			5,611

Investment_Securities

Investment Securities	3 Months Ended
	Mar. 31, 2015
Investment Securities
Investment Securities
	Note 5.  Investment Securities
	The following tables summarize the amortized cost, fair value, net unrealized gain and loss, and distribution of our investment securities for the dates indicated:
	Investment Securities Portfolio
	(Dollars in Thousands)
			As of March 31, 2015
			Amortized		Fair			Gross			Gross			Net Unrealized
			Cost		Value			Unrealized			Unrealized			Gains
								Losses			Gains
	Held-to-Maturity:
	Collateralized mortgage obligations (residential)		$	25	$	26		$	—		$	1		$	1
	Total investment securities held-to-maturity		$	25	$	26		$	—		$	1		$	1
	Available-for-Sale:
	Securities of government sponsored enterprises		$	51,815	$	51,899		$	(154	)	$	238		$	84
	Mortgage backed securities (residential)		79,566		80,803			(23		)	1,260			1,237
	Collateralized mortgage obligations (residential)		152,653		155,485			(348		)	3,180			2,832
	Corporate securities		14,999		15,470			—			471			471
	Municipal securities		23,585		25,686			—			2,101			2,101
	Total investment securities available-for-sale		$	322,618	$	329,343		$	(525	)	$	7,250		$	6,725
			As of December 31, 2014
			Amortized		Fair			Gross			Gross			Net Unrealized
			Cost		Value			Unrealized			Unrealized			Gains (Losses)
								Losses			Gains
	Held-to-Maturity:
	Collateralized mortgage obligations (residential)		$	26	$	28		$	—		$	2		$	2
	Total investment securities held-to-maturity		$	26	$	28		$	—		$	2		$	2
	Available-for-Sale:
	Securities of government sponsored enterprises		$	100,792	$	100,362		$	(490	)	$	60		$	(430	)
	Mortgage backed securities (residential)		82,454		83,367			(147		)	1,060			913
	Collateralized mortgage obligations (residential)		161,584		163,079			(657		)	2,152			1,495
	Corporate securities		14,994		15,514			—			520			520
	Municipal securities		23,966		26,045			—			2,079			2,079
	Total investment securities available-for-sale		$	383,790	$	388,367		$	(1,294	)	$	5,871		$	4,577
	There were no realized gains or losses on call or sale of securities for the first quarter of 2015 or the first quarter of 2014. Securities with a total fair value of approximately $319.1 million and $373.5 million were pledged to secure public deposits, or for other purposes required or permitted by law, at March 31, 2015 and December 31, 2014, respectively.
	The following table summarizes the maturity and repricing schedule of our investment securities at their carrying values (amortized cost for held-to maturity investment securities and fair value for available-for-sale investment securities) at March 31, 2015:
	Investment Maturities and Repricing Schedule
	(Dollars in Thousands)
			Within One		After One &			After Five &			After Ten			Total
			Year		Within Five			Within Ten			Years
					Years			Years
	Held-to-Maturity:
	Collateralized mortgage obligations (residential)		$	—	$	25		$	—		$	—		$	25
	Total investment securities held-to-maturity		$	—	$	25		$	—		$	—		$	25
	Available-for-Sale:
	Securities of government sponsored enterprises		$	—	$	22,027		$	29,872		$	—		$	51,899
	Mortgage backed securities (residential)		5,429		1,568			1,956			71,850			80,803
	Collateralized mortgage obligations (residential)		13,783		141,702			—			—			155,485
	Corporate securities		7,982		7,488			—			—			15,470
	Municipal securities		516		1,251			3,524			20,395			25,686
	Total investment securities available-for-sale		$	27,710	$	174,036		$	35,352		$	92,245		$	329,343
	The following tables summarize the gross unrealized losses and fair values of our investments, aggregated by investment category and length of time that they have been in continuous unrealized loss positions at March 31, 2015, and December 31, 2014:
			Less than 12 months					12 months or longer						Total
					Gross						Gross						Gross
	As of March 31, 2015				Unrealized						Unrealized						Unrealized
	(Dollars in Thousands)		Fair Value		Losses			Fair Value			Losses			Fair Value			Losses
	Available-for-Sale:
	Securities of government sponsored enterprises
	Mortgage-backed securities (residential)		$	—	$	—		$	9,846		$	(154	)	$	9,846		$	(154	)
	Collateralized mortgage obligations (residential)		16,913		(23		)	—			—			16,913			(23		)
	Municipal securities		—		—			21,993			(348		)	21,993			(348		)
	Total investment securities		$	16,913	$	(23	)	$	31,839		$	(502	)	$	48,752		$	(525	)
			Less than 12 months					12 months or longer						Total
					Gross						Gross						Gross
	As of December 31, 2014				Unrealized						Unrealized						Unrealized
(Dollars in Thousands)		Fair Value		Losses			Fair Value			Losses			Fair Value			Losses
Available-for-Sale:
Securities of government sponsored enterprises		$	37,523	$	(477	)	$	6,988		$	(13	)	$	44,511		$	(490	)
Mortgage-backed securities (residential)		34,911		(147		)	—			—			34,911			(147		)
Collateralized mortgage obligations (residential)		22,813		(588		)	27,955			(69		)	50,768			(657		)
Total investment securities		$	95,247	$	(1,212	)	$	34,943		$	(82	)	$	130,190		$	(1,294	)
Credit-related declines in the fair value of held-to-maturity and available-for-sale securities below their cost that are deemed to be other-than-temporary are reflected in earnings as realized losses in the “Consolidated Statements of Income” and declines related to all other factors are reflected in other comprehensive income (loss), net of taxes. In estimating other-than-temporary impairment losses, the Company considers, among other things, (i) the length of time and the extent to which the fair value has been less than cost, (ii) the financial condition and near-term prospects of the issuer, and (iii) the Company’s intent and ability to retain the investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value.
The Company performs an evaluation of the investment portfolio in assessing individual positions that have fair values that have declined below cost. In assessing whether there is other-than-temporary impairment, the Company considers:
	·		Whether or not all contractual cash flows due on a security will be collected; and
	·		Our positive intent and ability to hold the debt security until recovery in fair value or maturity
A number of factors are considered in the analysis, including but not limited to:
	·		Issuer’s credit rating;
	·		Likelihood of the issuer’s default or bankruptcy;
	·		Underlying collateral of the security;
	·		Industry in which the issuer operates;
	·		Nature of the investment;
	·		Severity and duration of the decline in fair value; and
	·		Analysis of the average life and effective maturity of the security.
Management determined that any individual unrealized loss as of March 31, 2015 and December 31, 2014 did not represent an other-than-temporary impairment. The unrealized losses on our government-sponsored enterprises (“GSE”) and collateralized mortgage obligations (“CMOs”) were attributable to both changes in interest rates (U.S. Treasury curve) and a repricing of risk (spreads widening against risk-fee rate) in the market. We do not own any non-agency mortgage-backed securities (“MBSs”) or CMOs. All GSE bonds, GSE CMOs, and GSE MBSs are backed by U.S. government sponsored enterprises and federal agencies and therefore rated “Aaa/AAA.” We have no exposure to the “Subprime Market” in the form of asset backed securities (“ABSs”) and collateralized debt obligations (“CDOs”) that are below investment grade. At March 31, 2015, we have the intent and ability to hold these securities in an unrealized loss position until the market values recover or the securities mature.
Municipal bonds and corporate bonds are evaluated by reviewing the credit-worthiness of the issuer and market conditions. Unrealized losses on municipal securities are primarily attributable to both changes in interest rates and a re-pricing of risk in the market. There were no unrealized losses on our corporate securities or municipal securities at March 31, 2015 and December 31, 2014.

Loans

Loans	3 Months Ended
	Mar. 31, 2015
Loans
Loans
	Note 6.  Loans
	The following footnote disclosure breaks out the Company’s loan portfolio in segments and classes. Segments are groupings of similar loans at a level which the Company has adopted systematic methods of documentation for determining its allowance for loan and credit losses. Classes are a disaggregation of the portfolio segments. The Company’s loan portfolio segments are:
	Construction loans — The Company originates loans to finance construction projects including one to four family residences, multifamily residences, senior housing, and industrial projects. Residential construction loans are due upon the sale of the completed project and are generally collateralized by first liens on the real estate and have floating interest rates. Construction loans are considered to have higher risks than other loans due to the ultimate repayment being sensitive to interest rate changes, governmental regulation of real property, and the availability of long-term financing. Economic conditions may also impact the Company’s ability to recover its investment in construction loans. Adverse economic conditions may negatively impact the real estate market which could affect the borrowers’ ability to complete and sell the project. Additionally, the fair value of the underlying collateral may fluctuate as market conditions change. As construction loans make up only a small percentage of the total loan portfolio, these loans are not further broken down into classes.
	Real estate secured loans — We offer real estate secured loans to finance the acquisition of, or to refinance the existing mortgages on commercial properties. Real estate secured loans are further broken out into classes based on the type of loans and underlying collateral. These classes include SBA loans secured by real estate, residential real estate loans, gas station loans, carwash loans, hotel/motel loans, land loans, and loans secured by other types of properties.
	Our commercial real estate loans are typically collateralized by first or junior deeds of trust on specific commercial properties, and, when possible, subject to corporate or individual guarantees from financially capable parties. The properties collateralizing real estate loans are principally located in the markets where our retail branches are located. Real estate loans typically bear an interest rate that floats with our base rate, the prime rate, or another established index. However, an increasing amount of new real estate secured loan originations bear fixed rather than floating interest rates due to the current competitive market environment and trends. Commercial real estate loans typically have 7-year maturities with up to 25-year amortization of principal and interest and loan-to-value ratios of 60-70% of the appraised value or purchase price, whichever is lower at origination. We usually impose a prepayment penalty on real estate secured loans, usually a period within three to five years of the date of the loan.
	Commercial and industrial loans — We offer commercial and industrial loans to various business enterprises. These loans include business lines of credit and business term loans to finance operations, to provide working capital, or for specific purposes, such as to finance the purchase of assets, equipment, or inventory. Since a borrower’s cash flow from operations is generally the primary source of repayment, our policies provide specific guidelines regarding required debt coverage and other important financial ratios.
	Lines of credit are extended to businesses or individuals based on the financial strength and integrity of the borrower. These lines of credit are secured primarily by business assets such as accounts receivable or inventory, and have a maturity of one year or less. Such lines of credit bear an interest rate that floats with our base rate, the prime rate, or another established index.
	We also provide warehouse lines of credit to mortgage loan originators. The lines of credit are used by these originators to fund mortgages which are then pledged to the Bank as collateral until the mortgage loans are sold and the lines of credit are paid down. The typical duration of these lines of credit from the time of funding to pay-down ranges from 10-30 days. Although collateralized by mortgage loans, the structure of warehouse lending agreements results in the commercial and industrial loan treatment for these types of loans.
	Business term loans are typically made to finance the acquisition of fixed assets, refinance short-term debts, or to finance the purchase of businesses. Business term loans generally have terms from one to seven years. They may be collateralized by the assets being acquired or other available assets and bear interest rates which either floats with our base rate, prime rate, another established index, or is fixed for the term of the loan.
	Commercial and industrial loans are broken down further into two different classes, SBA loans and other commercial and industrial loans.
	Consumer loans — The Company provides a broad range of consumer loans to customers, including personal lines of credit, cash secured loans, and automobile loans. Repayment of these loans is dependent on the borrowers’ ability to pay and the fair value of any underlying collateral.
	The following table shows the carrying amount of loans acquired in connection with the acquisitions of Mirae Bank, BankAsiana, and Saehan Bancorp, as well as legacy Wilshire loans:
		At March 31, 2015
		Loans Acquired From Former:									Legacy Wilshire
	(Dollars in Thousands)	Mirae Bank			BankAsiana			Saehan Bancorp			Loans			Total
	Construction loans	$	—		$	4,052		$	—		$	23,480		$	27,532
	Real estate secured loans	35,348			97,576			286,785			2,298,121			2,717,830
	Commercial and industrial	1,560			18,793			16,713			735,225			772,291
	Consumer loans	—			—			473			15,026			15,499
	Gross Loans	36,908			120,421			303,971			3,071,852			3,533,152
	Deferred loans fees and unearned income	—			—			—			(10,128		)	(10,128		)
	Total Loans	36,908			120,421			303,971			3,061,724			3,523,024
	Allowance For Loan Losses	(471		)	(212		)	(83		)	(47,404		)	(48,170		)
	Net Loans	$	36,437		$	120,209		$	303,888		$	3,014,320		$	3,474,854
	Held-for-sale loans included above	$	—		$	—		$	—		$	10,204		$	10,204
		At December 31, 2014
		Loans Acquired From Former:									Legacy Wilshire
	(Dollars in Thousands)	Mirae Bank			BankAsiana			Saehan Bancorp			Loans			Total
	Construction loans	$	—		$	3,947		$	—		$	18,688		$	22,635
	Real estate secured loans	38,546			101,100			303,699			2,229,639			2,672,984
	Commercial and industrial	2,607			20,749			18,672			571,294			613,322
	Consumer loans	—			—			646			20,423			21,069
	Gross Loans	41,153			125,796			323,017			2,840,044			3,330,010
	Deferred loans fees and unearned income	—			—			—			(9,930		)	(9,930		)
	Total Loans	41,153			125,796			323,017			2,830,114			3,320,080
	Allowance For Loan Losses	(416		)	(769		)	(1,281		)	(46,158		)	(48,624		)
	Net Loans	$	40,737		$	125,027		$	321,736		$	2,783,956		$	3,271,456
	Held-for-sale loans included above	$	—		$	—		$	—		$	11,783		$	11,783
	In accordance with ASC 310-30 (formerly AICPA Statement of Position “SOP 03-3”,  Accounting for Certain Loans or Debt Securities Acquired in a Transfer), acquired loans were divided into “ASC 310-30 loans” and “Non-ASC 310-30 loans”, at the time of acquisition. ASC 310-30 loans are acquired loans that had evidence of deterioration in credit quality and it was probable, at the time of acquisition, that we would be unable to collect all contractually required payments receivable. In contrast, Non-ASC 310-30 loans are all other acquired loans that do not qualify as ASC 310-30 loans.
	The difference between contractually required payments at the time of acquisition and the cash flows expected to be collected at the time of acquisition is referred to as the non-accretable difference which is included in the carrying amount of the loans. Subsequent declines to the expected cash flows will generally result in a provision for loan losses. Subsequent increases in cash flows result in a reversal of the provision for loan losses to the extent of prior charges, or a reversal of the non-accretable difference with a positive impact to interest income. Further, any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized as interest income over the remaining life of the loan when there is a reasonable expectation about the amount and timing of such cash flows.
	The following table represents the carrying balances, net of discount, of ASC 310-30 and Non-ASC 310-30 loans at March 31, 2015 and December 31, 2014. The unpaid principal balance, before discount, of ASC 310-30 loans was $10.7 million at March 31, 2015, $11.1 million at December 31, 2014, and $13.4 million at March 31, 2014.
	(Dollars in Thousands)	March 31, 2015			December 31, 2014			March 31, 2014
	Non-ASC 310-30 loans	$	460,069		$	488,625		$	590,912
	ASC 310-30 loans	1,231			1,341			2,451
	Total outstanding acquired loan balance	461,300			489,966			593,363
	Allowance related to acquired loans	(766		)	(2,466		)	(2,501		)
	Carrying amount, net of allowance	$	460,534		$	487,500		$	590,862
	The following table represents by loan segment the current balance of ASC 310-30 loans acquired for which it was probable at the time of acquisition that all of the contractually required payments would not be collected for the periods indicated:
	(Dollars in Thousands)	March 31, 2015			December 31, 2014			March 31, 2014
	Breakdown of ASC 310-30 loans
	Real Estate Secured	$	1,189		$	1,266		$	2,038
	Commercial & Industrial	42			75			413
	Total ASC 310-30 loans	$	1,231		$	1,341		$	2,451
	Loans acquired in connection with the acquisitions of Mirae Bank, BankAsiana, and Saehan Bancorp were discounted based on their estimated cash flows to be received on the acquisition dates. For the three months ended March 31, 2015 and March 31, 2014, changes to the total discount on acquired loans is shown in the following table:
		Three Months Ended
	(Dollars in Thousands)	March 31, 2015			March 31, 2014
	Balance at beginning of period	$	22,056		$	34,201
	Discount accretion income recognized	(2,061		)	(2,816		)
	Disposals related to charge-offs	(143		)	(172		)
	Disposals related to loan sales	—			—
	Balance at end of period	$	19,852		$	31,213
	The following table is a breakdown of changes to the accretable portion of the discount on acquired loans for the three months ended March 31, 2015 and March 31, 2014:
		Three Months Ended
(Dollars in Thousands)	March 31, 2015			March 31, 2014
Balance at beginning of period	$	20,400		$	31,450
Discount accretion income recognized	(2,061		)	(2,791		)
Disposals related to charge-offs	(7		)	(2		)
Balance at end of period	$	18,332		$	28,657
The table below summarizes for the periods indicated, changes to the allowance for loan losses and allowance for loan commitments arising from loans charged-off, recoveries on loans previously charged-off, provision for losses on loans and loan commitments, and certain ratios related to the allowance for loan losses:
Allowance for Losses on Loans and Loan Commitments
(Dollars in Thousands)
	Three Months Ended,
	March 31, 2015			December 31, 2014			March 31, 2014
Balances:
Allowance for loan losses:
Balances at beginning of period	$	48,624		$	53,116		$	53,563
Actual charge-offs:
Real estate secured	325			5,461			672
Commercial and industrial	999			852			964
Consumer	—			—			1
Total charge-offs	1,324			6,313			1,637
Recoveries on loans previously charged off:
Real estate secured	193			199			1,028
Commercial and industrial	667			1,620			510
Consumer	10			2			—
Total recoveries	870			1,821			1,538
Net loan charge-offs	454			4,492			99
Provision for losses on loans	—			—			—
Balances at end of period	$	48,170		$	48,624		$	53,464
Allowance for loan commitments:
Balances at beginning of period	$	1,023		$	1,023		$	1,023
Provision for losses on loan commitments	—			—			—
Balance at end of period	$	1,023		$	1,023		$	1,023
Ratios:
Net loan charge-offs to average total loans (annualized)	0.05		%	0.56		%	0.01		%
Allowance for loan losses to gross loans receivable at end of period (excluding loans held-for-sale)	1.37		%	1.47		%	1.86		%
Net loan charge-offs to allowance for loan losses at end of period	0.94		%	9.24		%	0.19		%
Net loan charge-offs to provision for loan losses and loan commitments	0.00		%	0.00		%	0.00		%
The table below summarizes for the end of the periods indicated, the balance of our allowance for loan losses by loan type and the percentage of allowance for loan losses to gross loans receivable balance by loan segment:
Distribution and Percentage Composition of Allowance for Loan Losses
(Dollars in Thousands)
	March 31, 2015								December 31, 2014
	Reserve			Loans			(%)		Reserve			Loans			(%)
				Receivable								Receivable
Construction	$	268		$	27,532		0.97	%	$	220		$	22,635		0.97	%
Real estate secured	31,072			2,708,814			1.15	%	31,889			2,662,129			1.20	%
Commercial and industrial	16,667			771,103			2.16	%	16,302			612,394			2.66	%
Consumer	163			15,499			1.05	%	213			21,069			1.01	%
Total Gross Loans Receivable *	$	48,170		$	3,522,948		1.37	%	$	48,624		$	3,318,227		1.47	%
* Held-for-sale loans of $10.2 million and $11.8 million at March 31, 2015 and December 31, 2014, respectively, were excluded from the total.
The following tables show the allowance for loan losses roll-forward and breakdown by loan segment for the three months ended March 31, 2015, and March 31, 2014:
	March 31, 2015
(Dollars in Thousands)	Construction			Real Estate			Commercial &			Consumer			Total
				Secured			Industrial
Balance at beginning of quarter	$	220		$	31,889		$	16,302		$	213		$	48,624
Total charge-offs	—			(325		)	(999		)	—			(1,324		)
Total recoveries	—			193			667			10			870
Provision (credit) for losses on loans	48			(685		)	697			(60		)	—
Balance at end of quarter	$	268		$	31,072		$	16,667		$	163		$	48,170
	March 31, 2014
(Dollars in Thousands)	Construction			Real Estate			Commercial &			Consumer			Total
				Secured			Industrial
Balance at beginning of quarter	$	814		$	41,401		$	11,238		$	110		$	53,563
Total charge-offs	—			(672		)	(964		)	(1		)	(1,637		)
Total recoveries	—			1,028			510			—			1,538
Provision (credit) for losses on loans	(23		)	(2,593		)	2,569			47			—
Balance at end of quarter	$	791		$	39,164		$	13,353		$	156		$	53,464
The allowance for loan losses is comprised of a general valuation allowance (“GVA”) based on quantitative and qualitative analyses of the loan portfolio and specific valuation allowances (“SVA”) for impaired loans.
A loan is impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement or if a concession was granted to the borrower current undergoing financial difficulties. At March 31, 2015, the outstanding balance of impaired loans totaled $69.6 million, of which $18.5 million had specific reserves of $6.9 million. At December 31, 2014, the outstanding balance of impaired loans totaled $69.9 million, of which $21.9 million had specific reserves of $9.0 million.
On a quarterly basis, we utilize a classification migration model combined with individual loan impairment as starting points for determining the adequacy of our allowance for losses on loans. Our loss migration analysis tracks a certain number of quarters of individual loan loss history to determine historical losses by classification category for different loan types, except for certain loans which are analyzed as homogeneous loan pools (i.e., home mortgage loans, home equity lines of credit, overdraft loans, express business loans, and automobile loans). These calculated loss factors are then applied to outstanding non-impaired loan balances. The Company also records a reserve for loan commitments based on historical loss rates and an internally defined utilization rate of exposure for unused off-balance sheet loan commitments.
To establish an adequate allowance, we must be able to recognize when loans initially become a problem. A risk grade of either pass, watch, special mention, substandard, or doubtful, is assigned to every loan in the portfolio, with the exception of homogeneous loans, or loans that are evaluated together in pools of similar loans. The following is a brief description of the loan classifications or risk grades used in our allowance calculation:
Pass Loans — Loans that are past due less than 30 days that do not exhibit signs of credit deterioration. The financial condition of the borrower is sound as well as the status of any collateral. Loans secured by cash (principal and interest) also fall within this classification.
Watch Loans — Performing loans with borrowers that have experienced adverse financial trends, higher debt/equity ratio, or weak liquidity positions, but not to the degree that the loan is considered a problem.
Special Mention — Loans that are currently protected but exhibit an increasing degree of risk based on weakening credit strength and/or repayment sources. Contingent or remedial plans to improve the Bank’s risk exposure should be documented.
Substandard — Loans inadequately protected by the current worth and paying capacity of the borrower or pledged collateral, if any. This grade is assigned when inherent credit weakness is apparent.
Doubtful — Loans having all the weakness inherent in a “substandard” classification but collection or liquidation is highly questionable with the possibility of loss at some future date.
The tables below represent the breakdown of the allowance for loan losses and gross loans receivable (gross loans excluding loans held-for-sale) balances by SVA and GVA at March 31, 2015 and December 31, 2014:
	March 31, 2015
(Dollars in Thousands)	Construction			Real Estate			Commercial &			Consumer			Gross Loans
				Secured			Industrial						Receivable
Impaired loans	$	—		$	54,014		$	15,579		$	—		$	69,593
Specific valuation allowance	$	—		$	1,054		$	5,805		$	—		$	6,859
Coverage ratio	0.00		%	1.95		%	37.26		%	0.00		%	9.86		%
Non-impaired loans	$	27,532		$	2,654,800		$	755,524		$	15,499		$	3,453,355
General valuation allowance	$	268		$	30,018		$	10,862		$	163		$	41,311
Coverage ratio	0.97		%	1.13		%	1.44		%	1.05		%	1.20		%
Gross loans receivable	$	27,532		$	2,708,814		$	771,103		$	15,499		$	3,522,948
Allowance for loan losses	$	268		$	31,072		$	16,667		$	163		$	48,170
Allowance coverage ratio	0.97		%	1.15		%	2.16		%	1.05		%	1.37		%
	December 31, 2014
(Dollars in Thousands)	Construction			Real Estate			Commercial &			Consumer			Gross Loans
				Secured			Industrial						Receivable
Impaired loans	$	—		$	52,510		$	17,371		$	—		$	69,881
Specific valuation allowance	$	—		$	1,886		$	7,123		$	—		$	9,009
Coverage ratio	0.00		%	3.59		%	41.01		%	0.00		%	12.89		%
Non-impaired loans	$	22,635		$	2,609,619		$	595,023		$	21,069		$	3,248,346
General valuation allowance	$	220		$	30,003		$	9,179		$	213		$	39,615
Coverage ratio	0.97		%	1.15		%	1.54		%	1.01		%	1.22		%
Gross loans receivable	$	22,635		$	2,662,129		$	612,394		$	21,069		$	3,318,227
Allowance for loan losses	$	220		$	31,889		$	16,302		$	213		$	48,624
Allowance coverage ratio	0.97		%	1.20		%	2.66		%	1.01		%	1.47		%
At March 31, 2015 and December 31, 2014, loans acquired with deteriorated credit quality (ASC 310-30 formerly SOP 03-3 loans) totaled $1.2 million and $1.3 million, respectively. At March 31, 2015, loans acquired with deteriorated credit quality had an allowance of $3,000, and at December 31, 2014, total allowance recorded for these loans totaled $253,000. The following is a breakdown of loan balances for loans acquired with deteriorated credit quality at March 31, 2015 and December 31, 2014:
	March 31, 2015
(Dollars in Thousands)	Construction			Real Estate			Commercial &			Consumer			Total
				Secured			Industrial
Balance of Loans Acquired With Deteriorated Credit Quality	$	—		$	1,189		$	42		$	—		$	1,231
Total Allowance for Loans Acquired With Deteriorated Credit Quality	$	—		$	—		$	3		$	—		$	3
	December 31, 2014
(Dollars in Thousands)	Construction			Real Estate			Commercial &			Consumer			Total
				Secured			Industrial
Balance of Loans Acquired With Deteriorated Credit Quality	$	—		$	1,266		$	75		$	—		$	1,341
Total Allowance for Loans Acquired With Deteriorated Credit Quality	$	—		$	220		$	33		$	—		$	253
Impaired loan net principal balances are broken down by those with specific reserves and without specific reserves, as shown in the following table for March 31, 2015 and December 31, 2014:
	For Quarter Ended
(Dollars in Thousands)	March 31, 2015			December 31, 2014
With Specific Reserves
Without Charge-Offs	$	17,387		$	21,597
With Charge-Offs	1,064			295
Without Specific Reserves
Without Charge-Off	38,835			31,335
With Charge-Offs	12,307			16,654
Total Impaired Loans*	69,593			69,881
Allowance on Impaired Loans	(6,859		)	(9,009		)
Impaired Loans Net of Allowance	$	62,734		$	60,872
* Balances net of SBA guaranteed portions and discount on acquired loans totaled $65.5 million and $65.6 million at March 31, 2015 and December 31, 2014, respectively.
Net principal balance and average balances for impaired loans with specific reserves, and those without specific reserves, at March 31, 2015 and December 31, 2014 are presented in the following tables by loan class:
	March 31, 2015									December 31, 2014
				Related			Average						Related			Average
(Dollars In Thousands)	Balance			Allowance			Balance			Balance			Allowance			Balance
With Specific Reserves:
Construction	$	—		$	—		$	—		$	—		$	—		$	—
Real Estate Secured:
Residential Real Estate	—			—			—			272			6			379
SBA Real Estate	1,431			327			1,704			1,145			310			1,220
Gas Station	—			—			—			640			65			650
Carwash	—			—			—			—			—			—
Hotel/Motel	230			22			232			2,104			469			2,068
Land	—			—			—			—			—			—
Other	6,385			705			6,404			5,950			1,036			6,051
Commercial & Industrial:
SBA Commercial	884			725			1,260			941			725			1,041
Commercial	9,521			5,080			9,972			10,840			6,398			14,016
Consumer	—			—			—			—			—			—
Total With Related Allowance	18,451			6,859			19,572			21,892			9,009			25,425
Without Specific Reserves:
Construction	$	—		$	—		$	—		$	—		$	—		$	—
Real Estate Secured:
Residential Real Estate	668			—			840			561			—			580
SBA Real Estate	7,025			—			10,268			7,781			—			6,336
Gas Station	5,302			—			5,807			4,765			—			5,086
Carwash	5,397			—			5,548			5,626			—			6,128
Hotel/Motel	5,581			—			5,858			3,629			—			3,873
Land	—			—			—			258			—			262
Other	21,995			—			24,314			19,779			—			22,551
Commercial & Industrial:
SBA Commercial	537			—			692			446			—			516
Commercial	4,637			—			4,937			5,144			—			5,720
Consumer	—			—			—			—			—			—
Total Without Related Allowance	51,142			—			58,264			47,989			—			51,052
Total Impaired Loans	$	69,593		$	6,859		$	77,836		$	69,881		$	9,009		$	76,477
Income recognized from payments received for impaired loans is recorded on a cash basis and not accrued. The cash basis income recognized from impaired loans for the quarters ended March 31, 2015, December 31, 2014, and March 31, 2014 totaled $390,000, $1.4 million, and $465,000, respectively.
Delinquent loans, including non-accrual loans 30 days or more past due, at March 31, 2015 and December 31, 2014, are presented in the following table by loan class:
	March 31, 2015												December 31, 2014
(Dollars In Thousands)	30-59			60-89			90 Days			Total			30-59			60-89		90 Days		Total
(Balances are net of SBA guaranteed portions)	Days			Days			or More			Past Due*			Days			Days		or More		Past Due*
	Past Due			Past Due			Past Due						Past Due			Past Due		Past Due
Legacy Wilshire:
Construction	$	—		$	—		$	—		$	—		$	—		$	—	$	—	$	—
Real Estate Secured:
Residential Real Estate	978			138			602			1,718			454			280		449		1,183
SBA Real Estate	2,209			—			354			2,563			1,623			129		399		2,151
Gas Station	—			—			—			—			—			—		—		—
Carwash	—			—			770			770			—			—		770		770
Hotel/Motel	—			—			1,102			1,102			—			—		1,162		1,162
Other	1,418			—			6,958			8,376			770			1,027		9,030		10,827
Commercial & Industrial:
SBA Commercial	806			—			175			981			193			369		—		562
Commercial	21			1,323			918			2,262			1,281			598		416		2,295
Consumer	—			—			—			—			—			—		—		—
Total Legacy Loans	5,432			1,461			10,879			17,772			4,321			2,403		12,226		18,950
Acquired Loans:
Construction	$	—		$	—		$	—		$	—		$	—		$	—	$	—	$	—
Real Estate Secured:
Residential Real Estate	—			—			135			135			—			—		134		134
SBA Real Estate	173			567			41			781			262			—		105		367
Gas Station	—			—			—			—			—			—		—		—
Carwash	—			—			—			—			—			—		—		—
Hotel/Motel	—			—			230			230			232			—		—		232
Other	1,554			—			1,550			3,104			188			246		3,030		3,464
Commercial & Industrial:
SBA Commercial	87			—			199			286			176			22		—		198
Commercial	707			244			212			1,163			528			300		2,008		2,836
Consumer	—			—			—			—			—			—		—		—
Total Acquired Loans	2,521			811			2,367			5,699			1,386			568		5,277		7,231
Total Past Due Loans	$	7,953		$	2,272		$	13,246		$	23,471		$	5,707		$	2,971	$	17,503	$	26,181
Non-Accrual Loans 30 Days or More Past Due:
Legacy Loans	$	378		$	1,394		$	10,879		$	12,651		$	116		$	904	$	12,226	$	13,246
Acquired Loans	200			457			2,367			3,024			426			246		5,277		5,949
Non-Accrual Loans Listed Above	$	578		$	1,851		$	13,246		$	15,675		$	542		$	1,150	$	17,503	$	19,195
*   Total past due balances are net of SBA guaranteed portions totaling $6.2 million and $7.7 million at March 31, 2015 and December 31, 2014, respectively.
Non-performing loans consisting of non-accrual loans and loans past due 90 days or more and still accruing at March 31, 2015 and December 31, 2014 are presented in the following table by loan class:
	March 31, 2015									December 31, 2014
				90 Days			Total						90 Days			Total
	Total			or More			Non-			Total			or More			Non-
(Dollars In Thousands)	Non-Accrual			Past Due and			Performing			Non-Accrual			Past Due and			Performing
(Balances are net of SBA guaranteed portions)	Loans			Still Accruing			Loans*			Loans			Still Accruing			Loans*
Legacy Wilshire:
Construction	$	—		$	—		$	—		$	—		$	—		$	—
Real Estate Secured:
Residential Real Estate	1,086			—			1,086			784			—			784
SBA Real Estate	685			—			685			632			—			632
Gas Station	—			—			—			28			—			28
Carwash	2,416			—			2,416			2,629			—			2,629
Hotel/Motel	2,251			—			2,251			2,328			—			2,328
Land	—			—			—			—			—			—
Other	11,487			—			11,487			12,852			—			12,852
Commercial & Industrial:
SBA Commercial	373			—			373			360			—			360
Other Commercial	5,888			—			5,888			5,150			—			5,150
Consumer	—			—			—			—			—			—
Total Legacy Loans	24,186			—			24,186			24,763			—			24,763
Acquired Loans:
Construction	$	—		$	—		$	—		$	—		$	—		$	—
Real Estate Secured:
Residential Real Estate	135			—			135			134			—			134
SBA Real Estate	1,566			—			1,566			1,828			—			1,828
Gas Station	2,165			—			2,165			2,185			—			2,185
Carwash	—			—			—			—			—			—
Hotel/Motel	932			—			932			718			—			718
Land	—			—			—			—			—			—
Other	2,606			—			2,606			5,429			—			5,429
Commercial & Industrial:
SBA Commercial	232			—			232			42			—			42
Other Commercial	700			—			700			2,166			—			2,166
Consumer	—			—			—			—			—			—
Total Acquired Loans	8,336			—			8,336			12,502			—			12,502
Total	$	32,522		$	—		$	32,522		$	37,265		$	—		$	37,265
*   Balances are net of SBA guaranteed portions totaling $7.5 million and $8.5 million at March 31, 2015 and December 31, 2014, respectively.
No interest income related to non-accrual loans was included in interest income for the three months ended March 31, 2015 and March 31, 2014. Additional income of approximately $111,000 and $419,000 would have been recorded during the three months ended March 31, 2015 and March 31, 2014, respectively, had these loans been paid in accordance with their original terms throughout the period indicated.
Loans classified as special mention, substandard, and doubtful at March 31, 2015 and December 31, 2014 are presented in the following table by classes of loans:
	March 31, 2015												December 31, 2014
(Dollars In Thousands)	Special			Sub-			Doubtful			Total*			Special			Sub-		Doubtful		Total*
(Balances are net of SBA guaranteed portions)	Mention			standard									Mention			standard
Legacy Loans:
Construction	$	—		$	—		$	—		$	—		$	—		$	—	$	—	$	—
Real Estate Secured:
Residential Real Estate	—			2,204			—			2,204			—			1,636		272		1,908
SBA Real Estate	3,190			6,746			185			10,121			2,860			5,842		189		8,891
Gas Station	1,117			5,722			—			6,839			1,126			5,794		—		6,920
Carwash	8,462			1,646			770			10,878			6,800			1,859		770		9,429
Hotel/Motel	1,196			1,596			1,102			3,894			1,207			1,616		1,162		3,985
Land	—			—			—			—			258			—		—		258
Other	30,037			24,986			7,564			62,587			28,064			16,801		9,251		54,116
Commercial & Industrial:
SBA Commercial	1,739			2,034			—			3,773			690			2,145		—		2,835
Other Commercial	15,614			20,062			—			35,676			11,914			20,699		—		32,613
Consumer	—			1			—			1			—			1		—		1
Total Legacy Loans	61,355			64,997			9,621			135,973			52,919			56,393		11,644		120,956
Acquired Loans:
Construction	$	—		$	—		$	—		$	—		$	—		$	—	$	—	$	—
Real Estate Secured:
Residential Real Estate	—			135			—			135			—			134		—		134
SBA Real Estate	2,386			4,572			41			6,999			2,400			4,397		41		6,838
Gas Station	639			2,961			—			3,600			645			2,987		—		3,632
Carwash	94			—			—			94			8,480			—		—		8,480
Hotel/Motel	—			4,316			—			4,316			—			4,364		—		4,364
Land	—			—			—			—			—			—		—		—
Other	14,371			9,616			160			24,147			10,503			10,279		160		20,942
Commercial & Industrial:
SBA Commercial	403			1,101			—			1,504			653			639		—		1,292
Other Commercial	1,674			1,704			—			3,378			1,175			3,112		107		4,394
Consumer	127			—			—			127			131			—		—		131
Total Acquired Loans	19,694			24,405			201			44,300			23,987			25,912		308		50,207
Total Loans	$	81,049		$	89,402		$	9,822		$	180,273		$	76,906		$	82,305	$	11,952	$	171,163
* Balances are net of SBA guaranteed portions totaling $14.9 million and $11.2 million at March 31, 2015 and December 31, 2014, respectively.
A loan restructuring constitutes a troubled debt restructuring (“TDR”) if the Company for economic or legal reasons related to the borrower’s financial difficulties, grants a concession to the borrower that it would not otherwise consider. Restructured loans typically present an elevated level of credit risk as the borrowers are not able to perform according to the original contractual terms of the loan. Loans that are reported as TDRs are accounted for in accordance with ASC 310-10-35 and are considered impaired and measured for specific impairment.
Loans that are considered TDRs are classified as performing, unless they are on non-accrual status or greater than 90 days delinquent as of the end of the most recent quarter. All TDR loans are considered impaired by the Company regardless of whether it is performing or non-performing. At March 31, 2015, the balance of non-accrual TDR loans totaled $7.5 million, and TDR loans performing in accordance with their modified terms totaled $32.8 million. At December 31, 2014, the balance of non-accrual TDR loans totaled $9.5 million, and TDR loans performing in accordance with their modified terms totaled $27.6 million. New TDR loans did not have a material impact on the Company’s allowance for loan losses for the three months ended March 31, 2015 or December 31, 2014.
The following tables present the total balance of TDR loans by loan type and types of concessions made at March 31, 2015 and December 31, 2014:
	March 31, 2015
(Dollars In Thousands, Net of SBA Guarantee)	Balance			Term/Maturity			Interest Rate			Total*
Real Estate Secured	$	14,745		$	12,698		$	1,169		$	28,612
Commercial & Industrial	2,345			7,454			1,883			11,682
Total TDR Loans	$	17,090		$	20,152		$	3,052		$	40,294
	December 31, 2014
(Dollars In Thousands, Net of SBA Guarantee)	Balance			Term/Maturity			Interest Rate			Total*
Real Estate Secured	$	16,431		$	7,890		$	775		$	25,096
Commercial & Industrial	2,656			7,389			1,969			12,014
Total TDR Loans	$	19,087		$	15,279		$	2,744		$	37,110
* SBA guaranteed portions totaled $1.3 million and $1.6 million at March 31, 2015 and December 31, 2014, respectively.
The following table represents the roll-forward of TDR loans with additions and reductions for the quarters ended March 31, 2015, December 31, 2014, and March 31, 2014:
(Dollars in Thousands, Net of SBA Guarantee)	March 31, 2015			December 31, 2014			March 31, 2014
Balance at Beginning of Period	$	37,110		$	42,738		$	36,220
New TDR Loans Added	5,767			1,540			5,010
Reductions Due to Sales	(991		)	(4,308		)	—
TDR Loans Paid Off	(742		)	(354		)	—
Reductions Due to Charge-Offs	(136		)	(1,084		)	(438		)
Other Changes (Payments, Amortization, and Other)	(714		)	(1,422		)	(664		)
Balance at End of Period	$	40,294		$	37,110		$	40,128
The following tables summarize the pre-modification and post-modification balances and types of concessions provided for new TDR loans for the quarters ended March 31, 2015, December 31, 2014, and March 31, 2014:
	March 31, 2015
(Dollars in Thousands, Net of SBA Guarantee)	Principal			Term/Maturity			Interest Rate			Total
Pre-Modification Balance:
Real Estate Secured	$	—		$	4,935		$	402		$	5,337
Commercial & Industrial	20			425			—			445
Total TDR Loans	$	20		$	5,360		$	402		$	5,782
Post-Modification Balance:
Real Estate Secured	$	—		$	4,921		$	402		$	5,323
Commercial & Industrial	20			424			—			444
Total TDR Loans	$	20		$	5,345		$	402		$	5,767
Number of Loans:
Real Estate Secured	—			2			1			3
Commercial & Industrial	1			4			—			5
Total TDR Loans	1			6			1			8
	December 31, 2014
(Dollars in Thousands, Net of SBA Guarantee)	Principal			Term/Maturity			Interest Rate			Total
Pre-Modification Balance:
Real Estate Secured	$	—		$	239		$	—		$	239
Commercial & Industrial	—			1,191			—			1,191
Total TDR Loans	$	—		$	1,430		$	—		$	1,430
Post-Modification Balance:
Real Estate Secured	$	—		$	284		$	—		$	284
Commercial & Industrial	—			1,224			—			1,224
Total TDR Loans	$	—		$	1,508		$	—		$	1,508
Number of Loans:
Real Estate Secured	—			1			—			1
Commercial & Industrial	—			2			—			2
Total TDR Loans	—			3			—			3
	March 31, 2014
(Dollars in Thousands, Net of SBA Guarantee)	Principal			Term/Maturity			Interest Rate			Total
Pre-Modification Balance:
Real Estate Secured	$	—		$	536		$	4,335		$	4,871
Commercial & Industrial	41			105			—			146
Total TDR Loans	$	41		$	641		$	4,335		$	5,017
Post-Modification Balance:
Real Estate Secured	$	—		$	533		$	4,335		$	4,868
Commercial & Industrial	41			101			—			142
Total TDR Loans	$	41		$	634		$	4,335		$	5,010
Number of Loans:
Real Estate Secured	—			2			1			3
Commercial & Industrial	2			3			—			5
Total TDR Loans	2			5			1			8
At March 31, 2015, December 31, 2014, and March 31, 2014, all TDR loans were modified with principal or payment, term or maturity, or interest rate concessions. Principal concessions usually consist of loans restructured to reduce the monthly payment through a reduction in principal, interest, or a combination of principal and interest payments for a certain period of time. Most of these types of concessions are usually interest only payments for three to six months. Term or maturity concessions are loans that are restructured to extend the maturity date beyond the original contractual term of loan. Interest rate concessions consist of TDR loans that are restructured with a lower interest rate than the original contractual rate and the reduced rate is lower than the current market interest rate for loans with similar risk characteristics.
The tables below summarize TDR loans that were modified during the twelve months ended March 31, 2015, December 31, 2014, and March 31, 2014 that had payment defaults during the period indicated. We consider a TDR loan to be in payment default if the loan has been transferred to non-accrual status. This usually means the loan is past due 90 days or more, but in certain cases a loan that is less than 90 days past due can be deemed a non-accrual loan if there exists evidence that the borrower will not be able to fulfill a portion or all of the obligated contractual payments. Defaulted TDR loans did not have material impact to the allowance for loan losses for the three months ended March 31, 2015, December 31, 2014, or March 31, 2014.
	TDRs With Payment Defaults During the
	Three Months Ended March 31, 2015
(Dollars in Thousands, Net of SBA Guarantee)	Principal			Term/Maturity			Interest Rate			Total
Pre-Modification Balance:
Real Estate Secured	$	—		$	—		$	—		$	—
Commercial & Industrial	1,121			24			—			1,145
Total TDRs Defaulted	$	1,121		$	24		$	—		$	1,145
Post-Modification Balance:
Real Estate Secured	$	—		$	—		$	—		$	—
Commercial & Industrial	1,107			—			—			1,107
Total TDRs Defaulted	$	1,107		$	—		$	—		$	1,107
Number of Loans:
Real Estate Secured	—			—			—			—
Commercial & Industrial	1			1			—			2
Total TDRs Defaulted Loans	1			1			—			2
	TDRs With Payment Defaults During the
	Three Months Ended December 31, 2014
(Dollars in Thousands, Net of SBA Guarantee)	Principal			Term/Maturity			Interest Rate			Total
Pre-Modification Balance:
Real Estate Secured	$	—		$	—		$	—		$	—
Commercial & Industrial	25			—			—			25
Total TDRs Defaulted	$	25		$	—		$	—		$	25
Post-Modification Balance:
Real Estate Secured	$	—		$	—		$	—		$	—
Commercial & Industrial	24			—			—			24
Total TDRs Defaulted	$	24		$	—		$	—		$	24
Number of Loans:
Real Estate Secured	—			—			—			—
Commercial & Industrial	1			—			—			1
Total TDRs Defaulted Loans	1			—			—			1
	TDRs With Payment Defaults During the
	Three Months Ended March 31, 2014
(Dollars in Thousands, Net of SBA Guarantee)	Principal			Term/Maturity			Interest Rate			Total
Pre-Modification Balance:
Real Estate Secured	$	417		$	—		$	—		$	417
Commercial & Industrial	3			—			—			3
Total TDRs Defaulted	$	420		$	—		$	—		$	420
Post-Modification Balance:
Real Estate Secured	$	414		$	—		$	—		$	414
Commercial & Industrial	3			—			—			3
Total TDRs Defaulted	$	417		$	—		$	—		$	417
Number of Loans:
Real Estate Secured	1			—			—			1
Commercial & Industrial	1			—			—			1
Total TDRs Defaulted Loans	2			—			—			2

Shareholders_Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2015
Stockholders' Equity Note
Shareholders' Equity
	Note 7.  Shareholders’ Equity
	Earnings Per Common Share
	Basic earnings per common share (“EPS”) excludes dilution and is calculated 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 securities or other contracts to issue common stock were exercised or converted into common stock, or resulted in the issuance of common stock that would then share in the earnings of the Company. The following table provides the basic and diluted EPS computations for the periods indicated below:
		Three Months Ended
		March 31,
	(Dollars in Thousands, Except per Share Data)	2015		2014
	Numerator:
	Net income	$	18,619	$	13,113
	Denominator for basic earnings per share:
	Weighted-average shares	78,326,505		78,115,779
	Effect of dilutive securities:
	Stock option dilution	328,860		380,327
	Denominator for diluted earnings per share:
	Adjusted weighted-average shares and assumed conversions	78,655,365		78,496,106
	Basic earnings per common share	$	0.24	$	0.17
	Diluted earnings per common share	$	0.24	$	0.17
	For the three months ended March 31, 2015 and March 31, 2014, stock option awards totaling 252,900 and 269,000, respectively, were excluded from dilutive earnings per common share calculation because the shares were deemed to be anti-dilutive.

FHLB_Advances_and_Junior_Subor

FHLB Advances and Junior Subordinated Debentures

3 Months Ended

Mar. 31, 2015

FHLB Advances and Junior Subordinated Debentures

FHLB Advances and Junior Subordinated Debentures

Note 8.  FHLB Advances and Junior Subordinated Debentures

The Company maintains a line of credit with the FHLB of San Francisco for use as a secondary source of funds. At March 31, 2015, the Company had approved financing with the San Francisco FHLB for maximum advances of up to 30% of total assets based on qualifying collateral. The Company’s borrowing capacity with the FHLB of San Francisco totaled $1.19 billion at March 31, 2015, with $150.0 million in borrowings outstanding and a remaining borrowing capacity of $1.04 billion.

During the third quarter of 2014, the Company borrowed from the FHLB a five year $50.0 million adjustable rate advance. The advance matures on September 23, 2019 and interest rate was 1.51% as of March 31, 2015. The interest rate resets on a quarterly basis based on the three month LIBOR plus 1.24%, and has an interest rate adjustment cap of 1.00% over the initial rate of the advance throughout the term. Therefore the interest rate cannot exceed 2.48% during the term of the advance regardless of how LIBOR rates moves. The Company also had a variable rate advance totaling $100.0 million from the FHLB. This advance has an open maturity and can be redeemed at any time. During the third quarter of 2014, the Company also entered into a forward commitment with the FHLB to borrow $100.0 million for a term of four years. The advance which will be funded on September 22, 2015, will mature on September 23, 2019, and has a fixed interest rate of 2.48% for the term of the borrowing.

The Company’s outstanding advances and forward commitment with the FHLB are not measured for fair value as they fail to meet the definition of a derivative. Derivative accounting is not required for the interest rate cap as it is “clearly and closely” related to the host instrument and does not meet the criteria set forth in ASC 815 “Derivatives and Hedging.”  The forward commitment with the FHLB also fails to meet certain criteria in ASC 815 to be accounted for as a derivative.

The following table shows the Company’s outstanding advances from FHLB at March 31, 2015:

(Dollars in Thousands)

Balance

Current Rate

Interest Rate

Issue Date

Maturity Date

Advance 1

$

100,000

0.24

%

Variable

12/26/12

Open

Advance 2  *

50,000

1.51

%

3 Month LIBOR + 1.2425%

9/22/14

9/23/19

Total

$

150,000

0.66

%

* The advance has an interest rate adjustment cap of 1.00% throughout the term of the advance.

The following table summarizes information relating to the Company’s FHLB advances for the periods indicated:

Three Months Ended

(Dollars in Thousands)

March 31, 2015

December 31, 2014

Balance at quarter end

$

150,000

$

150,000

Average balance during the quarter

150,000

150,000

Maximum amount outstanding at any month-end

150,000

150,000

Average interest rate during the quarter

0.63

%

0.63

%

Weighted average interest rate at quarter-end

0.66

%

0.68

%

Junior subordinated debentures at March 31, 2015 totaled $71.8 million, compared to $71.8 million at December 31, 2014. Wilshire Bancorp, as a wholly-owned subsidiary of the Bank in 2003 and as the parent company of the Bank in 2005 and 2007, issued an aggregate of $77.3 million in junior subordinated debentures as part of the issuance of $75.0 million in trust preferred securities by statutory trusts wholly-owned by Wilshire Bancorp. The purpose of these transactions was to raise additional capital.

On November 20, 2013, the Company acquired Saehan Bancorp. Saehan Bancorp had previously formed Saehan Capital Trust I, and issued junior subordinated debentures related to the trust totaling $20.6 million in March 2007. These debenture were acquired by Wilshire at a fair value of $9.7 million, or a discount of $10.9 million.

These junior subordinated debentures are senior in liquidation rights to the Company’s outstanding shares of common stock.

The following table summarizes the Company’s outstanding junior subordinated debentures at March 31, 2015:

(Dollars in Thousands)

Issued Date

Amount of

Interest

Current

Callable Date

Maturity

Debenture

Rate

Rate

Date

Issued

Wilshire Statutory Trust II

3/17/05

$

20,619

3 Month LIBOR + 1.79

%

2.061

%

06/17/2015(1)

3/17/35

Wilshire Statutory Trust III

9/15/05

15,464

3 Month LIBOR + 1.40

%

1.671

%

06/15/2015(2)

9/15/35

Wilshire Statutory Trust IV

7/10/07

25,774

3 Month LIBOR + 1.38

%

1.651

%

06/15/2015(3)

9/15/37

Saehan Capital Trust I

3/30/07

9,980

3 Month LIBOR + 1.62

%

1.891

%

06/30/2015(4)

3/30/37

$

71,837

-1

The Company has the right to redeem the $20.6 million debentures, in whole or in part, on any March 17, June 17, September 17, or December 17. The next callable date as of this report is June 17, 2015.

-2

The Company has the right to redeem the $15.5 million debentures, in whole or in part, on any March 15, June 15, September 15, or December 15. The next callable date as of this report is June 15, 2015.

-3

The Company has the right to redeem the $25.8 million debentures, in whole or in part, on any March 15, June 15, September 15, or December 15. The next callable date as of this report is June 15, 2015.

-4

The Company has the right to redeem the $20.6 million debentures, in whole or in part, on any March 30, June 30, September 30, or December 30. The next callable date as of this report is June 30, 2015.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2015
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income
	Note 9.  Accumulated Other Comprehensive Income
	Accumulated other comprehensive income includes unrealized gain and losses on available-for-sale investments, unrealized gains and losses on interest only strips, and unrecognized prior service costs on bank owned life insurance (“BOLI”). Changes to other accumulated other comprehensive income are presented net of tax effect as a component of equity. Reclassifications out of accumulated other comprehensive income are recorded in income either as a gain or loss. The reclassifications for available-for-sale securities are included in the “Consolidated Statements of Income” as gain on sale or call of securities.
	Changes to accumulated other comprehensive income by components are shown in the following tables for the periods indicated:
		Three Months Ended March 31, 2015
	(Dollars in Thousands)	Unrealized Gain			Unrealized Gain			BOLI			Total
		and Losses on			on Interest Only			Unrecognized
		AFS Securities			Strips			Prior Service
								Costs
	Balance at beginning of period	$	4,649		$	299		$	(495	)	$	4,453
	Other comprehensive income (loss) before reclassification	2,148			2			13			2,163
	Reclassifications from other comprehensive income	—			—			—			—
	Tax effect of current period changes	(903		)	(1		)	—			(904		)
	Current period changes net of taxes	1,245			1			13			1,259
	Balance at end of period	$	5,894		$	300		$	(482	)	$	5,712
		Three Months Ended March 31, 2014
	(Dollars in Thousands)r	Unrealized Gain			Unrealized Gain			BOLI			Total
		and Losses on			on Interest Only			Unrecognized
		AFS Securities			Strips			Prior Service
								Costs
	Balance at beginning of period	$	192		$	330		$	(545	)	$	(23	)
	Other comprehensive income (loss) before reclassification	3,122			(19		)	13			3,116
	Reclassifications from other comprehensive income	—						—			—
	Tax effect of current period changes	(1,311		)	8			—			(1,303		)
	Current period changes net of taxes	1,811			(11		)	13			1,813
	Balance at end of period	$	2,003		$	319		$	(532	)	$	1,790
	For the three months ended March 31, 2015 and March 31, 2014, there were no reclassifications from other comprehensive income.

Business_Segment_Reporting

Business Segment Reporting	3 Months Ended
	Mar. 31, 2015
Business Segment Reporting
Business Segment Reporting
	Note 10.  Business Segment Reporting
	The Company is managed as a single business segment and not managed as separate segments. The financial performance of the Company is reviewed by the chief operating decision maker on an aggregate basis and financial and strategic decisions are also made based on the Company as a whole. We consider “Banking Operations” to be our single combined operating segment which raises funds from deposits and borrowings for loans and investments, and provides lending products, including construction, real estate, commercial, and consumer loans to its customers.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies
Commitments and Contingencies
	Note 11.  Commitments and Contingencies
	We are a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of our customers. These financial instruments include commitments to extend credit, standby letters of credit, commercial letters of credit, commitments to fund investments in affordable housing partnerships, derivatives and operating lease commitments. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated statements of financial condition. Our exposure to credit loss in the event of nonperformance on commitments to extend credit and standby letters of credit is represented by the contractual notional amount of those instruments. We use the same credit policies in making commitments and conditional obligations as we do for extending loan facilities to customers. We evaluate each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary upon extension of credit, is based on our credit evaluation of the counterparty. The types of collateral that we may hold can vary and may include accounts receivable, inventory, property, plant and equipment, and income-producing properties.
	The Company enters into various stand-alone mortgage-banking derivatives in order to hedge the risk associated with the fluctuation of interest rates. Changes in fair value are recorded as mortgage banking revenue.  Commitments to fund certain mortgage loans (interest rate lock commitments), and forward commitments for the future delivery of mortgage loans to third party investors, are considered derivatives. At March 31, 2015, we had approximately $41.9 million in interest rate lock commitments and $32.9 million in total forward sales commitments for the future delivery of residential mortgage loans. There were no interest rate lock commitments and forward commitments at December 31, 2014. All derivative instruments are recognized on the balance sheet at their fair value.
	Commitments at March 31, 2015 and December 31, 2014 are summarized as follows:
	(Dollars in Thousands)	March 31, 2015		December 31, 2014
	Commitments to extend credit	$	380,831	$	391,728
	Standby letters of credit	238		1,391
	Commercial letters of credit	73,948		61,518
	Commitments to fund investments in affordable housing partnerships	8,844		9,430
	Interest rate lock	41,886		—
	Forward sales commitments	32,928		—
	Operating lease commitments	28,042		26,640
	In the normal course of business, we are involved in various legal claims. We have reviewed all legal claims against us with counsel and have taken into consideration the views of such counsel as to the potential outcome of the claims. Loss contingencies for all legal claims totaled $135,000 at both March 31, 2015 and December 31, 2014 and totaled $305,000 at March 31, 2014. It is reasonably possible we may incur losses in addition to the amounts we have accrued. However, at this time, we are unable to estimate the range of additional losses that are reasonably possible because of a number of factors, including the fact that certain of these litigation matters are still in their early stages and involve claims for which, at this point, we believe have little to no merit. Management has considered these and other possible loss contingencies and does not expect the amounts to be material to any of the consolidated financial statements.

Income_Tax_Provision

Income Tax Provision	3 Months Ended
	Mar. 31, 2015
Income Tax Provision
Income Tax Provision
	Note 12.  Income Tax Provision
	For the first quarter of 2015, the Company had an income tax provision totaling $10.2 million on pretax income of $28.8 million, representing an effective tax rate of 35.5%, compared with an income tax provision of $6.8 million on pretax net income of $19.9 million, representing an effective tax rate of 34.1% for the first quarter of 2014.
	The Company had unrecognized tax benefits of $2.9 million at both March 31, 2015 and at December 31, 2014 that related to uncertainties associated with federal and state income tax matters. Other than the accrued interest of $38,000 related to uncertain tax positions from an entity acquired in 2013, the Company recognized interest related to uncertain tax positions as part of the provision for federal and state income tax expense. During the three months ended March 31, 2015, the Company recognized approximately $9,000 in interest expense associated with its unrecognized tax benefits. The Company had accrued interest payable associated with unrecognized tax benefits of approximately $296,000 and $287,000, at March 31, 2015 and December 31, 2014, respectively.
	In calculating its interim income tax provision, the Company must project or estimate its pretax income for the year to determine its estimated annual effective tax rate. If the Company is unable to reliably estimate its pretax income for the year, the Company must determine its interim tax provision using the actual effective tax rate for the period. As of March 31, 2015, the Company believed it could reliably project its pretax income for 2015 and had determined the tax provision using the estimated annual effective tax rate. The Company expects to continue using the estimated annual effective tax rate to calculate tax provision for future quarters.
	The Company accounts for income taxes by recognizing deferred tax assets and liabilities based upon temporary differences between the financial reporting and tax basis of its assets and liabilities. Deferred tax valuation allowances are established when necessary to reduce the deferred tax assets when it is more-likely-than-not that a portion or all of the deferred tax assets will not be realized. Based on internal analysis, the Company determined that a valuation allowance for deferred tax assets was not required as of March 31, 2015.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2015
Recent Accounting Pronouncements
Recent Accounting Pronouncements
	Note 13.  Recent Accounting Pronouncements
	In January 2014, the FASB issued guidance ASU 2014-01, “Accounting for Investments in Qualified Affordable Housing Projects.” The amendments in ASU 2014-01 to Topic 323, “Equity Investments and Joint Ventures,” provides guidance on accounting for investments by a reporting entity in flow-through limited liability entities that manage or invest in affordable housing projects that qualify for the low-income housing tax credit. The 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. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received, and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The amendments are effective for fiscal years, and interim periods within those years, beginning after December 31, 2014 and should be applied retrospectively to all periods presented.  All of the Company’s LIHTC investments are within the scope of this guidance. The Company has adopted this guidance in the first quarter of 2015, but did not elect to use the proportional amortization method of accounting. Total tax credit related to low income housing investments realized in the first quarter of 2015 was $1.4 million. The Company has not had any impairment losses related to LIHTC.
	In February 2015, the FASB issued ASU 2015-02, “Amendments to the Consolidation Analysis.” ASU 2015-02 affects reporting entities that are required to evaluate whether they should consolidate certain legal entities. Specifically, the amendments: (1) Modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities (“VIEs”) or voting interest entities; (2) Eliminate the presumption that a general partner should consolidate a limited partnership; (3) Affect the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships; and (4) Provide a scope exception from consolidation guidance for reporting entities with interests in legal entities that are required to comply with or operate in accordance with requirements that are similar to those in Rule 2a-7 of the Investment Company Act of 1940 for registered money market funds. ASU 2015-02 is effective for interim and annual reporting periods beginning after December 15, 2015. The adoption of this new guidance is not expected to have a material impact on the Company’s consolidated financial statements.
	In April 2015, the FASB issued ASU 2015-05, “Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement.” ASU 2015-05 provides guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, 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. The new guidance does not change the accounting for a customer’s accounting for service contracts. ASU 2015-05 is effective for interim and annual reporting periods beginning after December 15, 2015. The adoption of this new guidance is not expected to have a material impact on the Company’s consolidated financial statements.

Fair_Value_Measurement_for_Fin1

Fair Value Measurement for Financial and Non-Financial Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Measurement for Financial and Non-Financial Assets and Liabilities
Summary of valuation of the Company's financial instruments measured on a recurring basis by the fair value hierarchy levels
	Assets and Liabilities Measured at Fair Value on a Recurring Basis
	(Dollars in Thousands)
		Fair Value Measurements Using:
	As of March 31, 2015	Total Fair			Quoted Prices in			Significant Other			Significant
		Value			Active Markets			Observable Inputs			Unobservable Inputs
					(Level 1)			(Level 2)			(Level 3)
	Investments:
	Securities of government sponsored enterprises	$	51,899		$	—		$	51,899		$	—
	Mortgage-backed securities (residential)	80,803			—			80,803			—
	Collateralized mortgage obligations (residential)	155,485			—			155,485			—
	Corporate securities	15,470			—			15,470			—
	Municipal bonds	25,686			—			25,686			—
	Servicing assets	19,813			—			—			19,813
	Mortgage banking derivative assets	557			—			557			—
	Mortgage banking derivative liabilities	(62		)	—			(62		)	—
		Fair Value Measurements Using:
	As of December 31, 2014	Total Fair			Quoted Prices in			Significant Other			Significant
		Value			Active Markets			Observable Inputs			Unobservable Inputs
					(Level 1)			(Level 2)			(Level 3)
	Investments:
	Securities of government sponsored enterprises	$	100,362		$	—		$	100,362		$	—
	Mortgage-backed securities (residential)	83,367			—			83,367			—
	Collateralized mortgage obligations (residential)	163,079			—			163,079			—
	Corporate securities	15,514			—			15,514			—
	Municipal bonds	26,045			—			26,045			—
	Servicing assets	18,031			—			—			18,031
Schedule of identification of financial instruments measured at fair value on a recurring basis, by asset category with a summary of changes in fair value
	(Dollars in Thousands)	At January			Net Realized			Unrealized			Net Purchases,			Transfers In or			At March		Net Cumulative
		1, 2015			Gains in Net			Gains in Other			Sales and			Out of			31, 2015		Unrealized Loss in
					Income			Comprehensive			Settlements			Level 3					Accumulated
								Income (Loss)											Other
																			Comprehensive
																			Income (Loss)
	Servicing assets	$	18,031		$	952		$	—		$	830		$	—		$	19,813	$	—
	(Dollars in Thousands)	At January			Net Realized			Unrealized			Net Purchases,			Transfers In or			At March		Net Cumulative
		1, 2014			Gains in Net			Gains in Other			Sales and			Out of			31, 2014		Unrealized Loss in
					Income			Comprehensive			Settlements			Level 3					Accumulated
								Income (Loss)											Other
																			Comprehensive
																			Income (Loss)
	Servicing assets	$	16,108		$	563		$	—		$	865		$	—		$	17,536	$	—
Schedule of notional amount and fair value of mortgage banking derivatives for the dates indicated:
		As of March 31, 2015						As of December 31, 2014
	(Dollars in Thousands)	Notional			Fair Value			Notional			Fair Value
		Amount						Amount
	Assets:
	Interest rate lock commitments	$	30,479		$	449		$	—		$	—
	Forward sale contracts related to mortgage banking:	17,671			108			—			—
	Liabilities:
	Interest rate lock commitments:	$	2,449		$	(2	)	$	—		$	—
	Forward sale contracts related to mortgage banking:	15,257			(60		)	—			—
Schedule of assets measured at estimated fair value on a non-recurring basis and the total losses resulting from these fair value adjustments
	As of March 31, 2015
	(Dollars in Thousands)	Level 1			Level 2			Level 3			Total			Net Realized
														Losses
	Collateral Dependent Impaired Loans:
	Commercial Real Estate	$	—		$	—		$	3,562		$	3,562		$	(569	)
	OREO:
	Commercial Real Estate	—			—			4,078			4,078			(874		)
	Residential Real Estate	—			—			713			713			(163		)
	Total	$	—		$	—		$	8,353		$	8,353		$	(1,606	)
	As of December 31, 2014
	(Dollars in Thousands)	Level 1			Level 2			Level 3			Total			Net Realized
														(Losses)/
														Gains
	Collateral Dependent Impaired Loans:
	Commercial Real Estate	$	—		$	—		$	6,563		$	6,563		$	(3,698	)
	Residential Real Estate	—			—			266			266			(179		)
	OREO:
	Commercial Real Estate	—			—			2,770			2,770			(406		)
	Total	$	—		$	—		$	9,599		$	9,599		$	(4,283	)
Schedule of quantitative information about the significant unobservable inputs (level 3) used in the fair value measurement for asset and liabilities measured on a recurring and non-recurring basis
	As of March 31, 2015
	(Dollars in Thousands)	Fair Value			Valuation Technique		Significant Unobservable Inputs		Range *
	Servicing assets	$	19,813		Discounted cash flow		Discount rate		4.0% - 9.3%
							Constant prepayment rate		7.0% - 9.1%
	Collateral dependent impaired loans:
	Commercial Real Estate	3,562			Sales comparison approach		Adjustment for difference between comparable sales and expected sales amounts		63.38%
	OREO:
	Commercial Real Estate	4,078			Sales comparison approach		Adjustment for difference between comparable sales and expected sales amounts		20.48%
	Residential Real Estate	713			Sales comparison approach		Adjustment for difference between comparable sales and expected sales amounts		8.70%
	As of December 31, 2014
	(Dollars in Thousands)	Fair Value			Valuation Technique		Significant Unobservable Inputs		Range
	Servicing assets	$	18,031		Discounted cash flow		Discount rate		4.0% - 9.3%
							Constant prepayment rate		8.8% - 9.4%
	Collateral dependent impaired loans:
	Commercial Real Estate	6,563			Sales Comparison Approach		Adjustment for difference between comparable sales and expected sales amounts		45.60%*
	Residential Real Estate	266			Sales Comparison Approach		Adjustment for difference between comparable sales and expected sales amounts		46.80%*
	OREO:
	Commercial Real Estate	2,770			Sales Comparison Approach		Adjustment for difference between comparable sales and expected sales amounts		23.29%*
	* Represents weighted average percentage
Summary of fair value estimates for financial instruments, as defined by ASC 825-10 Financial Instruments
				March 31, 2015						December 31, 2014
		Fair Value		Carrying			Estimated			Carrying			Estimated
	(Dollars in Thousands)	Level		Amount			Fair Value			Amount			Fair Value
	Assets:
	Cash and cash equivalents	Level 1		$	353,438		$	353,438		$	233,699		$	233,699
	Federal funds sold	Level 1		164			164			254			254
	Deposits held in other financial institutions	Level 1		8,000			8,000			8,000			8,000
	Investment securities available-for-sale	Level 2		329,343			329,343			388,367			388,367
	Investment securities held-to-maturity	Level 2		25			26			26			28
	Loans held-for-sale	Level 2		10,204			11,015			11,783			12,965
	Loans receivable–net	Level 3		3,464,650			3,480,021			3,259,673			3,270,398
	Federal Home Loan Bank stock	N/A		16,539			N/A			16,539			N/A
	Accrued interest receivable	Level 2/3		8,581			8,581			8,792			8,792
	Mortgage banking derivatives	Level 2		557			557			—			—
	Due from customers on acceptances	Level 1		6,472			6,472			5,611			5,611
	Liabilities:
	Non-interest bearing deposits	Level 1		$	997,803		$	997,803		$	915,413		$	915,413
	Interest bearing deposits	Level 2		2,637,363			2,611,959			2,485,846			2,454,488
	Junior subordinated debentures	Level 2		71,837			66,464			71,779			65,834
	Short-term FHLB advances	Level 1		100,000			100,000			100,000			100,000
	Long-term FHLB advances	Level 2		50,000			49,394			50,000			48,698
	Accrued interest payable	Level 1/2		2,406			2,406			2,228			2,228
	Mortgage banking derivatives	Level 2		62			62			—			—
	Acceptances outstanding	Level 1		6,472			6,472			5,611			5,611

Investment_Securities_Tables

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2015
Investment Securities
Schedule of investment securities portfolio
	Investment Securities Portfolio
	(Dollars in Thousands)
		As of March 31, 2015
		Amortized		Fair			Gross			Gross			Net Unrealized
		Cost		Value			Unrealized			Unrealized			Gains
							Losses			Gains
	Held-to-Maturity:
	Collateralized mortgage obligations (residential)	$	25	$	26		$	—		$	1		$	1
	Total investment securities held-to-maturity	$	25	$	26		$	—		$	1		$	1
	Available-for-Sale:
	Securities of government sponsored enterprises	$	51,815	$	51,899		$	(154	)	$	238		$	84
	Mortgage backed securities (residential)	79,566		80,803			(23		)	1,260			1,237
	Collateralized mortgage obligations (residential)	152,653		155,485			(348		)	3,180			2,832
	Corporate securities	14,999		15,470			—			471			471
	Municipal securities	23,585		25,686			—			2,101			2,101
	Total investment securities available-for-sale	$	322,618	$	329,343		$	(525	)	$	7,250		$	6,725
		As of December 31, 2014
		Amortized		Fair			Gross			Gross			Net Unrealized
		Cost		Value			Unrealized			Unrealized			Gains (Losses)
							Losses			Gains
	Held-to-Maturity:
	Collateralized mortgage obligations (residential)	$	26	$	28		$	—		$	2		$	2
	Total investment securities held-to-maturity	$	26	$	28		$	—		$	2		$	2
	Available-for-Sale:
	Securities of government sponsored enterprises	$	100,792	$	100,362		$	(490	)	$	60		$	(430	)
	Mortgage backed securities (residential)	82,454		83,367			(147		)	1,060			913
	Collateralized mortgage obligations (residential)	161,584		163,079			(657		)	2,152			1,495
	Corporate securities	14,994		15,514			—			520			520
	Municipal securities	23,966		26,045			—			2,079			2,079
	Total investment securities available-for-sale	$	383,790	$	388,367		$	(1,294	)	$	5,871		$	4,577
Schedule of amortized cost and estimated fair value of investment securities by their contractual maturities
	Investment Maturities and Repricing Schedule
	(Dollars in Thousands)
		Within One		After One &			After Five &			After Ten			Total
		Year		Within Five			Within Ten			Years
				Years			Years
	Held-to-Maturity:
	Collateralized mortgage obligations (residential)	$	—	$	25		$	—		$	—		$	25
	Total investment securities held-to-maturity	$	—	$	25		$	—		$	—		$	25
	Available-for-Sale:
	Securities of government sponsored enterprises	$	—	$	22,027		$	29,872		$	—		$	51,899
	Mortgage backed securities (residential)	5,429		1,568			1,956			71,850			80,803
	Collateralized mortgage obligations (residential)	13,783		141,702			—			—			155,485
	Corporate securities	7,982		7,488			—			—			15,470
	Municipal securities	516		1,251			3,524			20,395			25,686
	Total investment securities available-for-sale	$	27,710	$	174,036		$	35,352		$	92,245		$	329,343
Schedule of investments' gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position
		Less than 12 months					12 months or longer						Total
				Gross						Gross						Gross
	As of March 31, 2015			Unrealized						Unrealized						Unrealized
	(Dollars in Thousands)	Fair Value		Losses			Fair Value			Losses			Fair Value			Losses
	Available-for-Sale:
	Securities of government sponsored enterprises
	Mortgage-backed securities (residential)	$	—	$	—		$	9,846		$	(154	)	$	9,846		$	(154	)
	Collateralized mortgage obligations (residential)	16,913		(23		)	—			—			16,913			(23		)
	Municipal securities	—		—			21,993			(348		)	21,993			(348		)
	Total investment securities	$	16,913	$	(23	)	$	31,839		$	(502	)	$	48,752		$	(525	)
		Less than 12 months					12 months or longer						Total
				Gross						Gross						Gross
	As of December 31, 2014			Unrealized						Unrealized						Unrealized
	(Dollars in Thousands)	Fair Value		Losses			Fair Value			Losses			Fair Value			Losses
	Available-for-Sale:
	Securities of government sponsored enterprises	$	37,523	$	(477	)	$	6,988		$	(13	)	$	44,511		$	(490	)
	Mortgage-backed securities (residential)	34,911		(147		)	—			—			34,911			(147		)
	Collateralized mortgage obligations (residential)	22,813		(588		)	27,955			(69		)	50,768			(657		)
	Total investment securities	$	95,247	$	(1,212	)	$	34,943		$	(82	)	$	130,190		$	(1,294	)

Loans_Tables

Loans (Tables)	3 Months Ended
	Mar. 31, 2015
Loans
Schedule of carrying amount of loans acquired through acquisitions and legacy loans
		At March 31, 2015
		Loans Acquired From Former:									Legacy Wilshire
	(Dollars in Thousands)	Mirae Bank			BankAsiana			Saehan Bancorp			Loans			Total
	Construction loans	$	—		$	4,052		$	—		$	23,480		$	27,532
	Real estate secured loans	35,348			97,576			286,785			2,298,121			2,717,830
	Commercial and industrial	1,560			18,793			16,713			735,225			772,291
	Consumer loans	—			—			473			15,026			15,499
	Gross Loans	36,908			120,421			303,971			3,071,852			3,533,152
	Deferred loans fees and unearned income	—			—			—			(10,128		)	(10,128		)
	Total Loans	36,908			120,421			303,971			3,061,724			3,523,024
	Allowance For Loan Losses	(471		)	(212		)	(83		)	(47,404		)	(48,170		)
	Net Loans	$	36,437		$	120,209		$	303,888		$	3,014,320		$	3,474,854
	Held-for-sale loans included above	$	—		$	—		$	—		$	10,204		$	10,204
		At December 31, 2014
		Loans Acquired From Former:									Legacy Wilshire
	(Dollars in Thousands)	Mirae Bank			BankAsiana			Saehan Bancorp			Loans			Total
	Construction loans	$	—		$	3,947		$	—		$	18,688		$	22,635
	Real estate secured loans	38,546			101,100			303,699			2,229,639			2,672,984
	Commercial and industrial	2,607			20,749			18,672			571,294			613,322
	Consumer loans	—			—			646			20,423			21,069
	Gross Loans	41,153			125,796			323,017			2,840,044			3,330,010
	Deferred loans fees and unearned income	—			—			—			(9,930		)	(9,930		)
	Total Loans	41,153			125,796			323,017			2,830,114			3,320,080
	Allowance For Loan Losses	(416		)	(769		)	(1,281		)	(46,158		)	(48,624		)
	Net Loans	$	40,737		$	125,027		$	321,736		$	2,783,956		$	3,271,456
	Held-for-sale loans included above	$	—		$	—		$	—		$	11,783		$	11,783
Schedule of the carrying balance, net of discount, of ASC 310-30 and Non-ASC 310-30 loans
	(Dollars in Thousands)	March 31, 2015			December 31, 2014			March 31, 2014
	Non-ASC 310-30 loans	$	460,069		$	488,625		$	590,912
	ASC 310-30 loans	1,231			1,341			2,451
	Total outstanding acquired loan balance	461,300			489,966			593,363
	Allowance related to acquired loans	(766		)	(2,466		)	(2,501		)
	Carrying amount, net of allowance	$	460,534		$	487,500		$	590,862
Schedule of breakdown of acquired ASC 310-30 loans by loan type
	(Dollars in Thousands)	March 31, 2015			December 31, 2014			March 31, 2014
	Breakdown of ASC 310-30 loans
	Real Estate Secured	$	1,189		$	1,266		$	2,038
	Commercial & Industrial	42			75			413
	Total ASC 310-30 loans	$	1,231		$	1,341		$	2,451
Schedule of change to the discount on acquired loans
		Three Months Ended
	(Dollars in Thousands)	March 31, 2015			March 31, 2014
	Balance at beginning of period	$	22,056		$	34,201
	Discount accretion income recognized	(2,061		)	(2,816		)
	Disposals related to charge-offs	(143		)	(172		)
	Disposals related to loan sales	—			—
	Balance at end of period	$	19,852		$	31,213
Schedule of breakdown of changes to the accretable portion of the discount related to acquired loans
		Three Months Ended
	(Dollars in Thousands)	March 31, 2015			March 31, 2014
	Balance at beginning of period	$	20,400		$	31,450
	Discount accretion income recognized	(2,061		)	(2,791		)
	Disposals related to charge-offs	(7		)	(2		)
	Balance at end of period	$	18,332		$	28,657
Schedule of changes to the allowance for losses on loans and loan commitments and certain ratios related to the allowance for loan losses
	Allowance for Losses on Loans and Loan Commitments
	(Dollars in Thousands)
		Three Months Ended,
		March 31, 2015			December 31, 2014			March 31, 2014
	Balances:
	Allowance for loan losses:
	Balances at beginning of period	$	48,624		$	53,116		$	53,563
	Actual charge-offs:
	Real estate secured	325			5,461			672
	Commercial and industrial	999			852			964
	Consumer	—			—			1
	Total charge-offs	1,324			6,313			1,637
	Recoveries on loans previously charged off:
	Real estate secured	193			199			1,028
	Commercial and industrial	667			1,620			510
	Consumer	10			2			—
	Total recoveries	870			1,821			1,538
	Net loan charge-offs	454			4,492			99
	Provision for losses on loans	—			—			—
	Balances at end of period	$	48,170		$	48,624		$	53,464
	Allowance for loan commitments:
	Balances at beginning of period	$	1,023		$	1,023		$	1,023
	Provision for losses on loan commitments	—			—			—
	Balance at end of period	$	1,023		$	1,023		$	1,023
	Ratios:
	Net loan charge-offs to average total loans (annualized)	0.05		%	0.56		%	0.01		%
	Allowance for loan losses to gross loans receivable at end of period (excluding loans held-for-sale)	1.37		%	1.47		%	1.86		%
	Net loan charge-offs to allowance for loan losses at end of period	0.94		%	9.24		%	0.19		%
	Net loan charge-offs to provision for loan losses and loan commitments	0.00		%	0.00		%	0.00		%
Schedule of balance of allowance for losses by loan type and the percentage of allowance for loan losses to gross loans receivable balance by loan segment
	Distribution and Percentage Composition of Allowance for Loan Losses
	(Dollars in Thousands)
		March 31, 2015								December 31, 2014
		Reserve			Loans			(%)		Reserve			Loans			(%)
					Receivable								Receivable
	Construction	$	268		$	27,532		0.97	%	$	220		$	22,635		0.97	%
	Real estate secured	31,072			2,708,814			1.15	%	31,889			2,662,129			1.20	%
	Commercial and industrial	16,667			771,103			2.16	%	16,302			612,394			2.66	%
	Consumer	163			15,499			1.05	%	213			21,069			1.01	%
	Total Gross Loans Receivable *	$	48,170		$	3,522,948		1.37	%	$	48,624		$	3,318,227		1.47	%
	* Held-for-sale loans of $10.2 million and $11.8 million at March 31, 2015 and December 31, 2014, respectively, were excluded from the total.
Schedule of roll forward of the allowance for loan losses
		March 31, 2015
	(Dollars in Thousands)	Construction			Real Estate			Commercial &			Consumer			Total
					Secured			Industrial
	Balance at beginning of quarter	$	220		$	31,889		$	16,302		$	213		$	48,624
	Total charge-offs	—			(325		)	(999		)	—			(1,324		)
	Total recoveries	—			193			667			10			870
	Provision (credit) for losses on loans	48			(685		)	697			(60		)	—
	Balance at end of quarter	$	268		$	31,072		$	16,667		$	163		$	48,170
		March 31, 2014
	(Dollars in Thousands)	Construction			Real Estate			Commercial &			Consumer			Total
					Secured			Industrial
	Balance at beginning of quarter	$	814		$	41,401		$	11,238		$	110		$	53,563
	Total charge-offs	—			(672		)	(964		)	(1		)	(1,637		)
	Total recoveries	—			1,028			510			—			1,538
	Provision (credit) for losses on loans	(23		)	(2,593		)	2,569			47			—
	Balance at end of quarter	$	791		$	39,164		$	13,353		$	156		$	53,464
Schedule of breakdown of the allowance for loan losses and gross loans receivable (gross loans excluding loans held-for-sale) balances by SVA and GVA
		March 31, 2015
	(Dollars in Thousands)	Construction			Real Estate			Commercial &			Consumer			Gross Loans
					Secured			Industrial						Receivable
	Impaired loans	$	—		$	54,014		$	15,579		$	—		$	69,593
	Specific valuation allowance	$	—		$	1,054		$	5,805		$	—		$	6,859
	Coverage ratio	0.00		%	1.95		%	37.26		%	0.00		%	9.86		%
	Non-impaired loans	$	27,532		$	2,654,800		$	755,524		$	15,499		$	3,453,355
	General valuation allowance	$	268		$	30,018		$	10,862		$	163		$	41,311
	Coverage ratio	0.97		%	1.13		%	1.44		%	1.05		%	1.20		%
	Gross loans receivable	$	27,532		$	2,708,814		$	771,103		$	15,499		$	3,522,948
	Allowance for loan losses	$	268		$	31,072		$	16,667		$	163		$	48,170
	Allowance coverage ratio	0.97		%	1.15		%	2.16		%	1.05		%	1.37		%
		December 31, 2014
	(Dollars in Thousands)	Construction			Real Estate			Commercial &			Consumer			Gross Loans
					Secured			Industrial						Receivable
	Impaired loans	$	—		$	52,510		$	17,371		$	—		$	69,881
	Specific valuation allowance	$	—		$	1,886		$	7,123		$	—		$	9,009
	Coverage ratio	0.00		%	3.59		%	41.01		%	0.00		%	12.89		%
	Non-impaired loans	$	22,635		$	2,609,619		$	595,023		$	21,069		$	3,248,346
	General valuation allowance	$	220		$	30,003		$	9,179		$	213		$	39,615
	Coverage ratio	0.97		%	1.15		%	1.54		%	1.01		%	1.22		%
	Gross loans receivable	$	22,635		$	2,662,129		$	612,394		$	21,069		$	3,318,227
	Allowance for loan losses	$	220		$	31,889		$	16,302		$	213		$	48,624
	Allowance coverage ratio	0.97		%	1.20		%	2.66		%	1.01		%	1.47		%
Schedule of breakdown of loan balances for loans acquired with deteriorated credit quality
		March 31, 2015
	(Dollars in Thousands)	Construction			Real Estate			Commercial &			Consumer			Total
					Secured			Industrial
	Balance of Loans Acquired With Deteriorated Credit Quality	$	—		$	1,189		$	42		$	—		$	1,231
	Total Allowance for Loans Acquired With Deteriorated Credit Quality	$	—		$	—		$	3		$	—		$	3
		December 31, 2014
	(Dollars in Thousands)	Construction			Real Estate			Commercial &			Consumer			Total
					Secured			Industrial
	Balance of Loans Acquired With Deteriorated Credit Quality	$	—		$	1,266		$	75		$	—		$	1,341
	Total Allowance for Loans Acquired With Deteriorated Credit Quality	$	—		$	220		$	33		$	—		$	253
Summary of impaired loans at their recorded investment (or net principal balance) with and without specific reserves
		For Quarter Ended
	(Dollars in Thousands)	March 31, 2015			December 31, 2014
	With Specific Reserves
	Without Charge-Offs	$	17,387		$	21,597
	With Charge-Offs	1,064			295
	Without Specific Reserves
	Without Charge-Off	38,835			31,335
	With Charge-Offs	12,307			16,654
	Total Impaired Loans*	69,593			69,881
	Allowance on Impaired Loans	(6,859		)	(9,009		)
	Impaired Loans Net of Allowance	$	62,734		$	60,872
	* Balances net of SBA guaranteed portions and discount on acquired loans totaled $65.5 million and $65.6 million at March 31, 2015 and December 31, 2014, respectively.
Schedule of impairment balances with specific reserves and those without specific reserves by loan class
		March 31, 2015									December 31, 2014
					Related			Average						Related			Average
	(Dollars In Thousands)	Balance			Allowance			Balance			Balance			Allowance			Balance
	With Specific Reserves:
	Construction	$	—		$	—		$	—		$	—		$	—		$	—
	Real Estate Secured:
	Residential Real Estate	—			—			—			272			6			379
	SBA Real Estate	1,431			327			1,704			1,145			310			1,220
	Gas Station	—			—			—			640			65			650
	Carwash	—			—			—			—			—			—
	Hotel/Motel	230			22			232			2,104			469			2,068
	Land	—			—			—			—			—			—
	Other	6,385			705			6,404			5,950			1,036			6,051
	Commercial & Industrial:
	SBA Commercial	884			725			1,260			941			725			1,041
	Commercial	9,521			5,080			9,972			10,840			6,398			14,016
	Consumer	—			—			—			—			—			—
	Total With Related Allowance	18,451			6,859			19,572			21,892			9,009			25,425
	Without Specific Reserves:
	Construction	$	—		$	—		$	—		$	—		$	—		$	—
	Real Estate Secured:
	Residential Real Estate	668			—			840			561			—			580
	SBA Real Estate	7,025			—			10,268			7,781			—			6,336
	Gas Station	5,302			—			5,807			4,765			—			5,086
	Carwash	5,397			—			5,548			5,626			—			6,128
	Hotel/Motel	5,581			—			5,858			3,629			—			3,873
	Land	—			—			—			258			—			262
	Other	21,995			—			24,314			19,779			—			22,551
	Commercial & Industrial:
	SBA Commercial	537			—			692			446			—			516
	Commercial	4,637			—			4,937			5,144			—			5,720
	Consumer	—			—			—			—			—			—
	Total Without Related Allowance	51,142			—			58,264			47,989			—			51,052
	Total Impaired Loans	$	69,593		$	6,859		$	77,836		$	69,881		$	9,009		$	76,477
Schedule of delinquent loans, including non-accrual loans 30 days past due or greater by loan class
		March 31, 2015												December 31, 2014
	(Dollars In Thousands)	30-59			60-89			90 Days			Total			30-59			60-89		90 Days		Total
	(Balances are net of SBA guaranteed portions)	Days			Days			or More			Past Due*			Days			Days		or More		Past Due*
		Past Due			Past Due			Past Due						Past Due			Past Due		Past Due
	Legacy Wilshire:
	Construction	$	—		$	—		$	—		$	—		$	—		$	—	$	—	$	—
	Real Estate Secured:
	Residential Real Estate	978			138			602			1,718			454			280		449		1,183
	SBA Real Estate	2,209			—			354			2,563			1,623			129		399		2,151
	Gas Station	—			—			—			—			—			—		—		—
	Carwash	—			—			770			770			—			—		770		770
	Hotel/Motel	—			—			1,102			1,102			—			—		1,162		1,162
	Other	1,418			—			6,958			8,376			770			1,027		9,030		10,827
	Commercial & Industrial:
	SBA Commercial	806			—			175			981			193			369		—		562
	Commercial	21			1,323			918			2,262			1,281			598		416		2,295
	Consumer	—			—			—			—			—			—		—		—
	Total Legacy Loans	5,432			1,461			10,879			17,772			4,321			2,403		12,226		18,950
	Acquired Loans:
	Construction	$	—		$	—		$	—		$	—		$	—		$	—	$	—	$	—
	Real Estate Secured:
	Residential Real Estate	—			—			135			135			—			—		134		134
	SBA Real Estate	173			567			41			781			262			—		105		367
	Gas Station	—			—			—			—			—			—		—		—
	Carwash	—			—			—			—			—			—		—		—
	Hotel/Motel	—			—			230			230			232			—		—		232
	Other	1,554			—			1,550			3,104			188			246		3,030		3,464
	Commercial & Industrial:
	SBA Commercial	87			—			199			286			176			22		—		198
	Commercial	707			244			212			1,163			528			300		2,008		2,836
	Consumer	—			—			—			—			—			—		—		—
	Total Acquired Loans	2,521			811			2,367			5,699			1,386			568		5,277		7,231
	Total Past Due Loans	$	7,953		$	2,272		$	13,246		$	23,471		$	5,707		$	2,971	$	17,503	$	26,181
	Non-Accrual Loans 30 Days or More Past Due:
	Legacy Loans	$	378		$	1,394		$	10,879		$	12,651		$	116		$	904	$	12,226	$	13,246
	Acquired Loans	200			457			2,367			3,024			426			246		5,277		5,949
	Non-Accrual Loans Listed Above	$	578		$	1,851		$	13,246		$	15,675		$	542		$	1,150	$	17,503	$	19,195
	*   Total past due balances are net of SBA guaranteed portions totaling $6.2 million and $7.7 million at March 31, 2015 and December 31, 2014, respectively.
Summary of non-accrual loans and loans 90 days or more past due and still accruing
		March 31, 2015									December 31, 2014
					90 Days			Total						90 Days			Total
		Total			or More			Non-			Total			or More			Non-
	(Dollars In Thousands)	Non-Accrual			Past Due and			Performing			Non-Accrual			Past Due and			Performing
	(Balances are net of SBA guaranteed portions)	Loans			Still Accruing			Loans*			Loans			Still Accruing			Loans*
	Legacy Wilshire:
	Construction	$	—		$	—		$	—		$	—		$	—		$	—
	Real Estate Secured:
	Residential Real Estate	1,086			—			1,086			784			—			784
	SBA Real Estate	685			—			685			632			—			632
	Gas Station	—			—			—			28			—			28
	Carwash	2,416			—			2,416			2,629			—			2,629
	Hotel/Motel	2,251			—			2,251			2,328			—			2,328
	Land	—			—			—			—			—			—
	Other	11,487			—			11,487			12,852			—			12,852
	Commercial & Industrial:
	SBA Commercial	373			—			373			360			—			360
	Other Commercial	5,888			—			5,888			5,150			—			5,150
	Consumer	—			—			—			—			—			—
	Total Legacy Loans	24,186			—			24,186			24,763			—			24,763
	Acquired Loans:
	Construction	$	—		$	—		$	—		$	—		$	—		$	—
	Real Estate Secured:
	Residential Real Estate	135			—			135			134			—			134
	SBA Real Estate	1,566			—			1,566			1,828			—			1,828
	Gas Station	2,165			—			2,165			2,185			—			2,185
	Carwash	—			—			—			—			—			—
	Hotel/Motel	932			—			932			718			—			718
	Land	—			—			—			—			—			—
	Other	2,606			—			2,606			5,429			—			5,429
	Commercial & Industrial:
	SBA Commercial	232			—			232			42			—			42
	Other Commercial	700			—			700			2,166			—			2,166
	Consumer	—			—			—			—			—			—
	Total Acquired Loans	8,336			—			8,336			12,502			—			12,502
	Total	$	32,522		$	—		$	32,522		$	37,265		$	—		$	37,265
	*   Balances are net of SBA guaranteed portions totaling $7.5 million and $8.5 million at March 31, 2015 and December 31, 2014, respectively.
Schedule of loans classified as special mention, substandard and doubtful presented by classes of loans
		March 31, 2015												December 31, 2014
	(Dollars In Thousands)	Special			Sub-			Doubtful			Total*			Special			Sub-		Doubtful		Total*
	(Balances are net of SBA guaranteed portions)	Mention			standard									Mention			standard
	Legacy Loans:
	Construction	$	—		$	—		$	—		$	—		$	—		$	—	$	—	$	—
	Real Estate Secured:
	Residential Real Estate	—			2,204			—			2,204			—			1,636		272		1,908
	SBA Real Estate	3,190			6,746			185			10,121			2,860			5,842		189		8,891
	Gas Station	1,117			5,722			—			6,839			1,126			5,794		—		6,920
	Carwash	8,462			1,646			770			10,878			6,800			1,859		770		9,429
	Hotel/Motel	1,196			1,596			1,102			3,894			1,207			1,616		1,162		3,985
	Land	—			—			—			—			258			—		—		258
	Other	30,037			24,986			7,564			62,587			28,064			16,801		9,251		54,116
	Commercial & Industrial:
	SBA Commercial	1,739			2,034			—			3,773			690			2,145		—		2,835
	Other Commercial	15,614			20,062			—			35,676			11,914			20,699		—		32,613
	Consumer	—			1			—			1			—			1		—		1
	Total Legacy Loans	61,355			64,997			9,621			135,973			52,919			56,393		11,644		120,956
	Acquired Loans:
	Construction	$	—		$	—		$	—		$	—		$	—		$	—	$	—	$	—
	Real Estate Secured:
	Residential Real Estate	—			135			—			135			—			134		—		134
	SBA Real Estate	2,386			4,572			41			6,999			2,400			4,397		41		6,838
	Gas Station	639			2,961			—			3,600			645			2,987		—		3,632
	Carwash	94			—			—			94			8,480			—		—		8,480
	Hotel/Motel	—			4,316			—			4,316			—			4,364		—		4,364
	Land	—			—			—			—			—			—		—		—
	Other	14,371			9,616			160			24,147			10,503			10,279		160		20,942
	Commercial & Industrial:
	SBA Commercial	403			1,101			—			1,504			653			639		—		1,292
	Other Commercial	1,674			1,704			—			3,378			1,175			3,112		107		4,394
	Consumer	127			—			—			127			131			—		—		131
	Total Acquired Loans	19,694			24,405			201			44,300			23,987			25,912		308		50,207
	Total Loans	$	81,049		$	89,402		$	9,822		$	180,273		$	76,906		$	82,305	$	11,952	$	171,163
	* Balances are net of SBA guaranteed portions totaling $14.9 million and $11.2 million at March 31, 2015 and December 31, 2014, respectively.
Schedule of total recorded investment in TDR loans by types of concessions made and loan segment
		March 31, 2015
	(Dollars In Thousands, Net of SBA Guarantee)	Balance			Term/Maturity			Interest Rate			Total*
	Real Estate Secured	$	14,745		$	12,698		$	1,169		$	28,612
	Commercial & Industrial	2,345			7,454			1,883			11,682
	Total TDR Loans	$	17,090		$	20,152		$	3,052		$	40,294
		December 31, 2014
	(Dollars In Thousands, Net of SBA Guarantee)	Balance			Term/Maturity			Interest Rate			Total*
	Real Estate Secured	$	16,431		$	7,890		$	775		$	25,096
	Commercial & Industrial	2,656			7,389			1,969			12,014
	Total TDR Loans	$	19,087		$	15,279		$	2,744		$	37,110
	* SBA guaranteed portions totaled $1.3 million and $1.6 million at March 31, 2015 and December 31, 2014, respectively.
Schedule of the roll-forward of TDR loans with addition and reductions
	(Dollars in Thousands, Net of SBA Guarantee)	March 31, 2015			December 31, 2014			March 31, 2014
	Balance at Beginning of Period	$	37,110		$	42,738		$	36,220
	New TDR Loans Added	5,767			1,540			5,010
	Reductions Due to Sales	(991		)	(4,308		)	—
	TDR Loans Paid Off	(742		)	(354		)	—
	Reductions Due to Charge-Offs	(136		)	(1,084		)	(438		)
	Other Changes (Payments, Amortization, and Other)	(714		)	(1,422		)	(664		)
	Balance at End of Period	$	40,294		$	37,110		$	40,128
Summary of the pre-modification and post-modification balances and types of concessions provided for new TDR loans modified
		March 31, 2015
	(Dollars in Thousands, Net of SBA Guarantee)	Principal			Term/Maturity			Interest Rate			Total
	Pre-Modification Balance:
	Real Estate Secured	$	—		$	4,935		$	402		$	5,337
	Commercial & Industrial	20			425			—			445
	Total TDR Loans	$	20		$	5,360		$	402		$	5,782
	Post-Modification Balance:
	Real Estate Secured	$	—		$	4,921		$	402		$	5,323
	Commercial & Industrial	20			424			—			444
	Total TDR Loans	$	20		$	5,345		$	402		$	5,767
	Number of Loans:
	Real Estate Secured	—			2			1			3
	Commercial & Industrial	1			4			—			5
	Total TDR Loans	1			6			1			8
		December 31, 2014
	(Dollars in Thousands, Net of SBA Guarantee)	Principal			Term/Maturity			Interest Rate			Total
	Pre-Modification Balance:
	Real Estate Secured	$	—		$	239		$	—		$	239
	Commercial & Industrial	—			1,191			—			1,191
	Total TDR Loans	$	—		$	1,430		$	—		$	1,430
	Post-Modification Balance:
	Real Estate Secured	$	—		$	284		$	—		$	284
	Commercial & Industrial	—			1,224			—			1,224
	Total TDR Loans	$	—		$	1,508		$	—		$	1,508
	Number of Loans:
	Real Estate Secured	—			1			—			1
	Commercial & Industrial	—			2			—			2
	Total TDR Loans	—			3			—			3
		March 31, 2014
	(Dollars in Thousands, Net of SBA Guarantee)	Principal			Term/Maturity			Interest Rate			Total
	Pre-Modification Balance:
	Real Estate Secured	$	—		$	536		$	4,335		$	4,871
	Commercial & Industrial	41			105			—			146
	Total TDR Loans	$	41		$	641		$	4,335		$	5,017
	Post-Modification Balance:
	Real Estate Secured	$	—		$	533		$	4,335		$	4,868
	Commercial & Industrial	41			101			—			142
	Total TDR Loans	$	41		$	634		$	4,335		$	5,010
	Number of Loans:
	Real Estate Secured	—			2			1			3
	Commercial & Industrial	2			3			—			5
	Total TDR Loans	2			5			1			8
Summary of TDR loans that were modified during the past 12 months that had a payment default
		TDRs With Payment Defaults During the
		Three Months Ended March 31, 2015
	(Dollars in Thousands, Net of SBA Guarantee)	Principal			Term/Maturity			Interest Rate			Total
	Pre-Modification Balance:
	Real Estate Secured	$	—		$	—		$	—		$	—
	Commercial & Industrial	1,121			24			—			1,145
	Total TDRs Defaulted	$	1,121		$	24		$	—		$	1,145
	Post-Modification Balance:
	Real Estate Secured	$	—		$	—		$	—		$	—
	Commercial & Industrial	1,107			—			—			1,107
	Total TDRs Defaulted	$	1,107		$	—		$	—		$	1,107
	Number of Loans:
	Real Estate Secured	—			—			—			—
	Commercial & Industrial	1			1			—			2
	Total TDRs Defaulted Loans	1			1			—			2
		TDRs With Payment Defaults During the
		Three Months Ended December 31, 2014
	(Dollars in Thousands, Net of SBA Guarantee)	Principal			Term/Maturity			Interest Rate			Total
	Pre-Modification Balance:
	Real Estate Secured	$	—		$	—		$	—		$	—
	Commercial & Industrial	25			—			—			25
	Total TDRs Defaulted	$	25		$	—		$	—		$	25
	Post-Modification Balance:
	Real Estate Secured	$	—		$	—		$	—		$	—
	Commercial & Industrial	24			—			—			24
	Total TDRs Defaulted	$	24		$	—		$	—		$	24
	Number of Loans:
	Real Estate Secured	—			—			—			—
	Commercial & Industrial	1			—			—			1
	Total TDRs Defaulted Loans	1			—			—			1
		TDRs With Payment Defaults During the
		Three Months Ended March 31, 2014
	(Dollars in Thousands, Net of SBA Guarantee)	Principal			Term/Maturity			Interest Rate			Total
	Pre-Modification Balance:
	Real Estate Secured	$	417		$	—		$	—		$	417
	Commercial & Industrial	3			—			—			3
	Total TDRs Defaulted	$	420		$	—		$	—		$	420
	Post-Modification Balance:
	Real Estate Secured	$	414		$	—		$	—		$	414
	Commercial & Industrial	3			—			—			3
	Total TDRs Defaulted	$	417		$	—		$	—		$	417
	Number of Loans:
	Real Estate Secured	1			—			—			1
	Commercial & Industrial	1			—			—			1
	Total TDRs Defaulted Loans	2			—			—			2

Shareholders_Equity_Tables

Shareholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2015
Stockholders' Equity Note
Schedule of reconciliation of the basic and diluted per common share computations
		Three Months Ended
		March 31,
	(Dollars in Thousands, Except per Share Data)	2015		2014
	Numerator:
	Net income	$	18,619	$	13,113
	Denominator for basic earnings per share:
	Weighted-average shares	78,326,505		78,115,779
	Effect of dilutive securities:
	Stock option dilution	328,860		380,327
	Denominator for diluted earnings per share:
	Adjusted weighted-average shares and assumed conversions	78,655,365		78,496,106
	Basic earnings per common share	$	0.24	$	0.17
	Diluted earnings per common share	$	0.24	$	0.17

FHLB_Advances_and_Junior_Subor1

FHLB Advances and Junior Subordinated Debentures (Tables)	3 Months Ended
	Mar. 31, 2015
FHLB Advances and Junior Subordinated Debentures
Schedule of outstanding advances from FHLB
	(Dollars in Thousands)		Balance			Current Rate		Interest Rate		Issue Date		Maturity Date
	Advance 1		$	100,000		0.24	%	Variable		12/26/12		Open
	Advance 2  *		50,000			1.51	%	3 Month LIBOR + 1.2425%		9/22/14		9/23/19
	Total		$	150,000		0.66	%
	* The advance has an interest rate adjustment cap of 1.00% throughout the term of the advance.
Summary of information relating to the FHLB advances
			Three Months Ended
	(Dollars in Thousands)		March 31, 2015			December 31, 2014
	Balance at quarter end		$	150,000		$	150,000
	Average balance during the quarter		150,000			150,000
	Maximum amount outstanding at any month-end		150,000			150,000
	Average interest rate during the quarter		0.63		%	0.63		%
	Weighted average interest rate at quarter-end		0.66		%	0.68		%
Summary of outstanding subordinated debentures
	(Dollars in Thousands)		Issued Date		Amount of			Interest		Current		Callable Date	Maturity
					Debenture			Rate		Rate			Date
					Issued
	Wilshire Statutory Trust II		3/17/05		$	20,619		3 Month LIBOR + 1.79	%	2.061	%	06/17/2015(1)	3/17/35
	Wilshire Statutory Trust III		9/15/05		15,464			3 Month LIBOR + 1.40	%	1.671	%	06/15/2015(2)	9/15/35
	Wilshire Statutory Trust IV		7/10/07		25,774			3 Month LIBOR + 1.38	%	1.651	%	06/15/2015(3)	9/15/37
	Saehan Capital Trust I		3/30/07		9,980			3 Month LIBOR + 1.62	%	1.891	%	06/30/2015(4)	3/30/37
					$	71,837
		-1		The Company has the right to redeem the $20.6 million debentures, in whole or in part, on any March 17, June 17, September 17, or December 17. The next callable date as of this report is June 17, 2015.
		-2		The Company has the right to redeem the $15.5 million debentures, in whole or in part, on any March 15, June 15, September 15, or December 15. The next callable date as of this report is June 15, 2015.
		-3		The Company has the right to redeem the $25.8 million debentures, in whole or in part, on any March 15, June 15, September 15, or December 15. The next callable date as of this report is June 15, 2015.
		-4		The Company has the right to redeem the $20.6 million debentures, in whole or in part, on any March 30, June 30, September 30, or December 30. The next callable date as of this report is June 30, 2015.

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2015
Accumulated Other Comprehensive Income
Schedule of changes to accumulated other comprehensive income by components
		Three Months Ended March 31, 2015
	(Dollars in Thousands)	Unrealized Gain			Unrealized Gain			BOLI			Total
		and Losses on			on Interest Only			Unrecognized
		AFS Securities			Strips			Prior Service
								Costs
	Balance at beginning of period	$	4,649		$	299		$	(495	)	$	4,453
	Other comprehensive income (loss) before reclassification	2,148			2			13			2,163
	Reclassifications from other comprehensive income	—			—			—			—
	Tax effect of current period changes	(903		)	(1		)	—			(904		)
	Current period changes net of taxes	1,245			1			13			1,259
	Balance at end of period	$	5,894		$	300		$	(482	)	$	5,712
		Three Months Ended March 31, 2014
	(Dollars in Thousands)r	Unrealized Gain			Unrealized Gain			BOLI			Total
		and Losses on			on Interest Only			Unrecognized
		AFS Securities			Strips			Prior Service
								Costs
	Balance at beginning of period	$	192		$	330		$	(545	)	$	(23	)
	Other comprehensive income (loss) before reclassification	3,122			(19		)	13			3,116
	Reclassifications from other comprehensive income	—						—			—
	Tax effect of current period changes	(1,311		)	8			—			(1,303		)
	Current period changes net of taxes	1,811			(11		)	13			1,813
	Balance at end of period	$	2,003		$	319		$	(532	)	$	1,790

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies
Schedule of commitments
	(Dollars in Thousands)	March 31, 2015		December 31, 2014
	Commitments to extend credit	$	380,831	$	391,728
	Standby letters of credit	238		1,391
	Commercial letters of credit	73,948		61,518
	Commitments to fund investments in affordable housing partnerships	8,844		9,430
	Interest rate lock	41,886		—
	Forward sales commitments	32,928		—
	Operating lease commitments	28,042		26,640

Business_of_Wilshire_Bancorp_I1

Business of Wilshire Bancorp, Inc. (Details)	3 Months Ended
	Mar. 31, 2015
	item
Business of Wilshire Bancorp, Inc.
Number of full-service branch offices in Southern California, Texas, New Jersey, and the greater New York City metropolitan area	34
Business of wilshire bancorp, Inc
Number of loan production offices utilized primarily for origination of loans under SBA lending program	7
SBA
Business of wilshire bancorp, Inc
Number of loan production offices utilized primarily for origination of loans under SBA lending program	4
Residential mortgage
Business of wilshire bancorp, Inc
Number of loan production offices utilized primarily for origination of loans under SBA lending program	3

Recent_Acquisitions_Details

Recent Acquisitions (Details) (Bank of Manhattan's Mortgage Lending Division, USD $)	3 Months Ended
	Mar. 31, 2015
	item
	employee
Bank of Manhattan's Mortgage Lending Division
Acquisitions
Number of employees in the acquisition	30
Number of locations acquired	3
Purchase price	$20,000

Fair_Value_Measurement_for_Fin2

Fair Value Measurement for Financial and Non-Financial Assets and Liabilities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	$329,343	$388,367
Servicing assets	19,813	18,031
Securities of government sponsored enterprises
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	51,899	100,362
Mortgage-backed securities (residential)
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	80,803	83,367
Collateralized mortgage obligations (residential)
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	155,485	163,079
Corporate Debt Securities
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	15,470	15,514
Municipal bonds
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	25,686	26,045
Fair Value, Measurements, Recurring | Estimated Fair Value
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Servicing assets	19,813	18,031
Fair Value, Measurements, Recurring | Estimated Fair Value | Securities of government sponsored enterprises
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	51,899	100,362
Fair Value, Measurements, Recurring | Estimated Fair Value | Mortgage-backed securities (residential)
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	80,803	83,367
Fair Value, Measurements, Recurring | Estimated Fair Value | Collateralized mortgage obligations (residential)
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	155,485	163,079
Fair Value, Measurements, Recurring | Estimated Fair Value | Corporate Debt Securities
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	15,470	15,514
Fair Value, Measurements, Recurring | Estimated Fair Value | Municipal bonds
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	25,686	26,045
Fair Value, Measurements, Recurring | Estimated Fair Value | Mortgage banking derivatives
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Mortgage banking derivative assets	557
Mortgage banking derivative liabilities	-62
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Securities of government sponsored enterprises
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	51,899	100,362
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Mortgage-backed securities (residential)
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	80,803	83,367
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Collateralized mortgage obligations (residential)
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	155,485	163,079
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Corporate Debt Securities
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	15,470	15,514
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Municipal bonds
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Investments	25,686	26,045
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Mortgage banking derivatives
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Mortgage banking derivative assets	557
Mortgage banking derivative liabilities	-62
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Summary of valuation of the company's financial instruments measured on a recurring basis by the fair value hierarchy levels
Servicing assets	$19,813	$18,031

Fair_Value_Measurement_for_Fin3

Fair Value Measurement for Financial and Non-Financial Assets and Liabilities (Details 2) (USD $)	3 Months Ended	12 Months Ended	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Summary of changes in fair value by asset category
Transfer of financial assets from level 1 to level 2	$0	$0
Transfer of financial assets from level 2 to level 1	0	0
Transfer of financial liabilities from level 1 to level 2	0	0
Transfer of financial liabilities from level 2 to level 1	0	0
Transfer of financial assets into and out of level 3	0	0
Transfer of financial liabilities into and out of level 3	0	0
Servicing Asset
Summary of changes in fair value by asset category
Balance at the beginning of the period	18,031	16,108	16,108
Net Realized Gains in Net Income	952		563
Net Purchases, Sales and Settlements	830		865
Balance at the end of the period	$19,813		$17,536

Fair_Value_Measurement_for_Fin4

Fair Value Measurement for Financial and Non-Financial Assets and Liabilities (Details 3) (USD $)	Mar. 31, 2015
Forward sale contracts related to mortgage banking
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commitments for the future delivery of residential mortgage loans	$32,900,000
Asset, Fair value	108,000
Liability, Fair value	-60,000
Asset, Notional Amount	17,671,000
Liabilities, Notional Amount	15,257,000
Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commitments for the future delivery of residential mortgage loans	41,900,000
Asset, Fair value	449,000
Liability, Fair value	-2,000
Asset, Notional Amount	30,479,000
Liabilities, Notional Amount	$2,449,000

Fair_Value_Measurement_for_Fin5

Fair Value Measurement for Financial and Non-Financial Assets and Liabilities (Details 4) (Fair Value, Measurements, Nonrecurring, USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total		$9,599
Net Realized (Losses)/Gains	-1,606	-4,283
Collateral Dependent Impaired Financing Receivable | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total		6,563
Net Realized (Losses)/Gains	-569	-3,698
Collateral Dependent Impaired Financing Receivable | Residential Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total		266
Net Realized (Losses)/Gains		-179
Other Real Estate Owned | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total		2,770
Net Realized (Losses)/Gains	-874	-406
Other Real Estate Owned | Residential Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	-163
Estimated Fair Value
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	8,353
Estimated Fair Value | Collateral Dependent Impaired Financing Receivable | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	3,562
Estimated Fair Value | Other Real Estate Owned | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	4,078
Estimated Fair Value | Other Real Estate Owned | Residential Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	713
Fair Value, Inputs, Level 3
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	8,353	9,599
Fair Value, Inputs, Level 3 | Collateral Dependent Impaired Financing Receivable | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	3,562	6,563
Fair Value, Inputs, Level 3 | Collateral Dependent Impaired Financing Receivable | Residential Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total		266
Fair Value, Inputs, Level 3 | Other Real Estate Owned | Commercial Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	4,078	2,770
Fair Value, Inputs, Level 3 | Other Real Estate Owned | Residential Real Estate
Aggregated balance of assets measured at estimated fair value on a non-recurring basis
Total	$713

Fair_Value_Measurement_for_Fin6

Fair Value Measurement for Financial and Non-Financial Assets and Liabilities (Details 5) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Servicing Asset
Quantitative information about the significant unobservable inputs (level 3) used in the fair value measurement for asset and liabilities measured on a recurring and non-recurring basis
Fair value of assets	19,813	18,031
Servicing Asset | Minimum | Discounted Cash Flow Valuation Technique
Quantitative information about the significant unobservable inputs (level 3) used in the fair value measurement for asset and liabilities measured on a recurring and non-recurring basis
Discount rate (as a percent)	4.00%	4.00%
Constant prepayment rate (as a percent)	7.00%	8.80%
Servicing Asset | Maximum | Discounted Cash Flow Valuation Technique
Quantitative information about the significant unobservable inputs (level 3) used in the fair value measurement for asset and liabilities measured on a recurring and non-recurring basis
Discount rate (as a percent)	9.30%	9.30%
Constant prepayment rate (as a percent)	9.10%	9.40%
Commercial Real Estate
Quantitative information about the significant unobservable inputs (level 3) used in the fair value measurement for asset and liabilities measured on a recurring and non-recurring basis
Fair value of assets	3,562	6,563
Commercial Real Estate | Weighted Average | Sales Comparison Approach Valuation Technique
Quantitative information about the significant unobservable inputs (level 3) used in the fair value measurement for asset and liabilities measured on a recurring and non-recurring basis
Adjustment for difference between comparable sales and expected sales amounts (as a percent)	63.38%	45.60%
Residential Real Estate
Quantitative information about the significant unobservable inputs (level 3) used in the fair value measurement for asset and liabilities measured on a recurring and non-recurring basis
Fair value of assets		266
Residential Real Estate | Weighted Average | Sales Comparison Approach Valuation Technique
Quantitative information about the significant unobservable inputs (level 3) used in the fair value measurement for asset and liabilities measured on a recurring and non-recurring basis
Adjustment for difference between comparable sales and expected sales amounts (as a percent)		46.80%
Other Commercial Real Estate Owned
Quantitative information about the significant unobservable inputs (level 3) used in the fair value measurement for asset and liabilities measured on a recurring and non-recurring basis
Fair value of assets	4,078	2,770
Other Commercial Real Estate Owned | Weighted Average | Sales Comparison Approach Valuation Technique
Quantitative information about the significant unobservable inputs (level 3) used in the fair value measurement for asset and liabilities measured on a recurring and non-recurring basis
Adjustment for difference between comparable sales and expected sales amounts (as a percent)	20.48%	23.29%
Other Residential Real Estate Owned
Quantitative information about the significant unobservable inputs (level 3) used in the fair value measurement for asset and liabilities measured on a recurring and non-recurring basis
Fair value of assets	713
Other Residential Real Estate Owned | Weighted Average | Sales Comparison Approach Valuation Technique
Quantitative information about the significant unobservable inputs (level 3) used in the fair value measurement for asset and liabilities measured on a recurring and non-recurring basis
Adjustment for difference between comparable sales and expected sales amounts (as a percent)	8.70%

Fair_Value_Measurement_for_Fin7

Fair Value Measurement for Financial and Non-Financial Assets and Liabilities (Details 6) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Assets:
Deposits held in other financial institutions	$8,000	$8,000
Investment securities available-for-sale	329,343	388,367
Investment securities held-to-maturity	26	28
Federal Home Loan Bank stock	16,539	16,539
Due from customers on acceptances	6,472	5,611
Liabilities:
Non-interest bearing deposits	997,803	915,413
Junior subordinated debentures	71,837	71,779
Long-term FHLB advances	150,000	150,000
Acceptances outstanding	6,472	5,611
Carrying Amount
Assets:
Federal Home Loan Bank stock	16,539	16,539
Carrying Amount | Fair Value, Inputs, Level 1
Assets:
Cash and cash equivalents	353,438	233,699
Federal funds sold	164	254
Deposits held in other financial institutions	8,000	8,000
Due from customers on acceptances	6,472	5,611
Liabilities:
Non-interest bearing deposits	997,803	915,413
Short-term FHLB advances	100,000	100,000
Accrued interest payable	2,406	2,228
Acceptances outstanding	6,472	5,611
Carrying Amount | Fair Value, Inputs, Level 2
Assets:
Investment securities available-for-sale	329,343	388,367
Investment securities held-to-maturity	25	26
Loans held-for-sale	10,204	11,783
Accrued interest receivable	8,581	8,792
Mortgage banking derivatives	557
Liabilities:
Interest bearing deposits	2,637,363	2,485,846
Junior subordinated debentures	71,837	71,779
Long-term FHLB advances	50,000	50,000
Mortgage banking derivatives	62
Carrying Amount | Fair Value, Inputs, Level 3
Assets:
Loans receivable-net	3,464,650	3,259,673
Estimated Fair Value | Fair Value, Inputs, Level 1
Assets:
Cash and cash equivalents	353,438	233,699
Federal funds sold	164	254
Deposits held in other financial institutions	8,000	8,000
Due from customers on acceptances	6,472	5,611
Liabilities:
Non-interest bearing deposits	997,803	915,413
Short-term FHLB advances	100,000	100,000
Accrued interest payable	2,406	2,228
Acceptances outstanding	6,472	5,611
Estimated Fair Value | Fair Value, Inputs, Level 2
Assets:
Investment securities available-for-sale	329,343	388,367
Investment securities held-to-maturity	26	28
Loans held-for-sale	11,015	12,965
Accrued interest receivable	8,581	8,792
Mortgage banking derivatives	557
Liabilities:
Interest bearing deposits	2,611,959	2,454,488
Junior subordinated debentures	66,464	65,834
Long-term FHLB advances	49,394	48,698
Mortgage banking derivatives	62
Estimated Fair Value | Fair Value, Inputs, Level 3
Assets:
Loans receivable-net	$3,480,021	$3,270,398

Investment_Securities_Details

Investment Securities (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Held-to-Maturity:
Amortized Cost	$25,000		$26,000
Fair Value	26,000		28,000
Gross Unrealized Gains	1,000		2,000
Net Unrealized Gains	1,000		2,000
Available-for-Sale:
Amortized Cost	322,618,000		383,790,000
Fair Value	329,343,000		388,367,000
Gross Unrealized Losses	-525,000		-1,294,000
Gross Unrealized Gains	7,250,000		5,871,000
Net Unrealized Gains	6,725,000		4,577,000
Net gain on sale/call of available-for-sale securities	0	0
Securities pledged
Fair value of securities pledged	319,100,000		373,500,000
Securities of government sponsored enterprises
Available-for-Sale:
Amortized Cost	51,815,000		100,792,000
Fair Value	51,899,000		100,362,000
Gross Unrealized Losses	-154,000		-490,000
Gross Unrealized Gains	238,000		60,000
Net Unrealized Gains	84,000		-430,000
Mortgage-backed securities (residential)
Available-for-Sale:
Amortized Cost	79,566,000		82,454,000
Fair Value	80,803,000		83,367,000
Gross Unrealized Losses	-23,000		-147,000
Gross Unrealized Gains	1,260,000		1,060,000
Net Unrealized Gains	1,237,000		913,000
Collateralized mortgage obligations (residential)
Held-to-Maturity:
Amortized Cost	25,000		26,000
Fair Value	26,000		28,000
Gross Unrealized Gains	1,000		2,000
Net Unrealized Gains	1,000		2,000
Available-for-Sale:
Amortized Cost	152,653,000		161,584,000
Fair Value	155,485,000		163,079,000
Gross Unrealized Losses	-348,000		-657,000
Gross Unrealized Gains	3,180,000		2,152,000
Net Unrealized Gains	2,832,000		1,495,000
Corporate Debt Securities
Available-for-Sale:
Amortized Cost	14,999,000		14,994,000
Fair Value	15,470,000		15,514,000
Gross Unrealized Gains	471,000		520,000
Net Unrealized Gains	471,000		520,000
Municipal bonds
Available-for-Sale:
Amortized Cost	23,585,000		23,966,000
Fair Value	25,686,000		26,045,000
Gross Unrealized Gains	2,101,000		2,079,000
Net Unrealized Gains	$2,101,000		$2,079,000

Investment_Securities_Details_

Investment Securities (Details 2) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Held-to-Maturity:
After One & Within Five Years	$25
Amortized Cost	25	26
Available-for-Sale:
Within One Year	27,710
After One & Within Five Years	174,036
After Five & Within Ten Years	35,352
After Ten Years	92,245
Fair Value	329,343	388,367
Investments' gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position
Less than 12 months, Fair Value	16,913	95,247
Less than 12 months, Gross Unrealized Losses	-23	-1,212
12 months or longer, Fair Value	31,839	34,943
12 months or longer, Gross Unrealized Losses	-502	-82
Total Fair Value	48,752	130,190
Total Gross Unrealized Losses	-525	-1,294
Securities of government sponsored enterprises
Available-for-Sale:
After One & Within Five Years	22,027
After Five & Within Ten Years	29,872
Fair Value	51,899	100,362
Investments' gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position
Less than 12 months, Fair Value		37,523
Less than 12 months, Gross Unrealized Losses		-477
12 months or longer, Fair Value		6,988
12 months or longer, Gross Unrealized Losses		-13
Total Fair Value		44,511
Total Gross Unrealized Losses		-490
Mortgage-backed securities (residential)
Available-for-Sale:
Within One Year	5,429
After One & Within Five Years	1,568
After Five & Within Ten Years	1,956
After Ten Years	71,850
Fair Value	80,803	83,367
Investments' gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position
Less than 12 months, Fair Value		34,911
Less than 12 months, Gross Unrealized Losses		-147
12 months or longer, Fair Value	9,846
12 months or longer, Gross Unrealized Losses	-154
Total Fair Value	9,846	34,911
Total Gross Unrealized Losses	-154	-147
Collateralized mortgage obligations (residential)
Held-to-Maturity:
After One & Within Five Years	25
Amortized Cost	25	26
Available-for-Sale:
Within One Year	13,783
After One & Within Five Years	141,702
Fair Value	155,485	163,079
Investments' gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position
Less than 12 months, Fair Value	16,913	22,813
Less than 12 months, Gross Unrealized Losses	-23	-588
12 months or longer, Fair Value		27,955
12 months or longer, Gross Unrealized Losses		-69
Total Fair Value	16,913	50,768
Total Gross Unrealized Losses	-23	-657
Corporate Debt Securities
Available-for-Sale:
Within One Year	7,982
After One & Within Five Years	7,488
Fair Value	15,470	15,514
Investments' gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position
Held-to-maturity securities with unrealized losses	0
Municipal bonds
Available-for-Sale:
Within One Year	516
After One & Within Five Years	1,251
After Five & Within Ten Years	3,524
After Ten Years	20,395
Fair Value	25,686	26,045
Investments' gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position
12 months or longer, Fair Value	21,993
12 months or longer, Gross Unrealized Losses	-348
Total Fair Value	21,993
Total Gross Unrealized Losses	($348)

Loans_Details

Loans (Details) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2014
Loans Receivable
Total	$3,533,152,000			$3,330,010,000
Deferred loans fees and unearned income	-10,128,000			-9,930,000
Loans Receivable	3,522,948,000	3,318,227,000		3,318,227,000
Loans and Leases Receivable Net of Deferred Income Not Covered	3,523,024,000	3,320,080,000		3,320,080,000
Allowance for loan losses	-48,170,000	-48,624,000	-53,464,000	-48,624,000
Net Loans	3,474,854,000	3,271,456,000		3,271,456,000
Loans held-for-sale	10,204,000	11,783,000		11,783,000
Non-covered loans:
Gross loans	461,300,000	489,966,000	593,363,000	489,966,000
Allowance for losses on loans	-766,000	-2,466,000	-2,501,000	-2,466,000
Net loans	460,534,000	487,500,000	590,862,000	487,500,000
Allowance for loan losses
Balances at beginning of period	48,624,000	53,116,000	53,563,000	53,563,000
Charge-offs	1,324,000	6,313,000	1,637,000
Recoveries on loans previously charged off	870,000	1,821,000	1,538,000
Net loan charge-offs	454,000	4,492,000	99,000
Balances at end of period	48,170,000	48,624,000	53,464,000	48,624,000
Allowance for loan commitments
Balances at beginning of period	1,023,000	1,023,000	1,023,000	1,023,000
Balances at end of period	1,023,000	1,023,000	1,023,000	1,023,000
Ratios:
Net loan charge-offs to average net loans (annualized) (as a percent)	0.05%	0.56%	0.01%
Allowance for loan losses to gross loans receivable at end of period (excluding loans held-for-sale)	1.37	1.47	1.86	1.47
Net loan charge-offs to allowance for loan losses at end of period	0.94	9.24	0.19
Net loan charge-offs to provision for loan losses and loan commitments	0.00%	0.00%	0.00%
Accounting Standard Codification Topic 3, 1030 Loans
Non-covered loans:
Gross loans	1,231,000	1,341,000	2,451,000	1,341,000
Non Accounting Standard Codification Topic 3 1030 Loans
Non-covered loans:
Gross loans	460,069,000	488,625,000	590,912,000	488,625,000
Deteriorated Loans
Non-covered loans:
Unpaid principal balance, before discount	10,700,000	11,100,000	13,400,000	11,100,000
Gross loans	1,231,000	1,341,000		1,341,000
Allowance for losses on loans	3,000	253,000		253,000
Legacy Loans
Loans Receivable
Total	3,071,852,000			2,840,044,000
Deferred loans fees and unearned income	-10,128,000			-9,930,000
Loans and Leases Receivable Net of Deferred Income Not Covered	3,061,724,000	2,830,114,000		2,830,114,000
Allowance for loan losses	-47,404,000	-46,158,000		-46,158,000
Net Loans	3,014,320,000	2,783,956,000		2,783,956,000
Loans held-for-sale	10,204,000	11,783,000		11,783,000
Allowance for loan losses
Balances at beginning of period	46,158,000
Balances at end of period	47,404,000	46,158,000		46,158,000
Loans Receivable Held For Sale
Loans Receivable
Loans Receivable	10,200,000	11,800,000		11,800,000
Mirae Bank
Changes to the total discount related to loans acquired from Mirae Bank
Balance at beginning of period	22,056,000		34,201,000	34,201,000
Discount accretion income recognized	-2,061,000		-2,816,000
Disposals related to charge-offs	-143,000		-172,000
Balance at end of period	19,852,000		31,213,000
Changes to the accretable portion of the discount on acquired loans
Balance at beginning of period	20,400,000		31,450,000	31,450,000
Discount accretion income recognized	-2,061,000		-2,791,000
Disposals related to charge-offs	-7,000		-2,000
Balance at end of period	18,332,000		28,657,000
Mirae Bank | Acquired Loans
Loans Receivable
Total	36,908,000			41,153,000
Loans and Leases Receivable Net of Deferred Income Not Covered	36,908,000	41,153,000		41,153,000
Allowance for loan losses	-471,000	-416,000		-416,000
Net Loans	36,437,000	40,737,000		40,737,000
Allowance for loan losses
Balances at beginning of period	416,000
Balances at end of period	471,000	416,000		416,000
Bank Asiana | Acquired Loans
Loans Receivable
Total	120,421,000			125,796,000
Loans and Leases Receivable Net of Deferred Income Not Covered	120,421,000	125,796,000		125,796,000
Allowance for loan losses	-212,000	-769,000		-769,000
Net Loans	120,209,000	125,027,000		125,027,000
Allowance for loan losses
Balances at beginning of period	769,000
Balances at end of period	212,000	769,000		769,000
Saehan Bancorp | Acquired Loans
Loans Receivable
Total	303,971,000			323,017,000
Loans and Leases Receivable Net of Deferred Income Not Covered	303,971,000	323,017,000		323,017,000
Allowance for loan losses	-83,000	-1,281,000		-1,281,000
Net Loans	303,888,000	321,736,000		321,736,000
Allowance for loan losses
Balances at beginning of period	1,281,000
Balances at end of period	83,000	1,281,000		1,281,000
Construction
Loans Receivable
Total	27,532,000			22,635,000
Construction | Legacy Loans
Loans Receivable
Total	23,480,000			18,688,000
Construction | Bank Asiana | Acquired Loans
Loans Receivable
Total	4,052,000			3,947,000
Real Estate Secured
Distribution and Percentage Composition of Allowance for Loan Losses
Loan maturity period	7 years
Loan principal and interest amortization period	25 years
Loans Receivable
Total	2,717,830,000			2,672,984,000
Allowance for loan losses
Charge-offs	325,000	5,461,000	672,000
Recoveries on loans previously charged off	193,000	199,000	1,028,000
Real Estate Secured | Minimum
Distribution and Percentage Composition of Allowance for Loan Losses
Loan-to-value ratio (as a percent)	60.00%
Prepayment penalty period from the date of the loan	3 years
Real Estate Secured | Maximum
Distribution and Percentage Composition of Allowance for Loan Losses
Loan-to-value ratio (as a percent)	70.00%
Prepayment penalty period from the date of the loan	5 years
Real Estate Secured | Accounting Standard Codification Topic 3, 1030 Loans
Non-covered loans:
Gross loans	1,189,000	1,266,000	2,038,000	1,266,000
Real Estate Secured | Deteriorated Loans
Non-covered loans:
Gross loans	1,189,000	1,266,000		1,266,000
Allowance for losses on loans		220,000		220,000
Real Estate Secured | Legacy Loans
Loans Receivable
Total	2,298,121,000			2,229,639,000
Real Estate Secured | Mirae Bank | Acquired Loans
Loans Receivable
Total	35,348,000			38,546,000
Real Estate Secured | Bank Asiana | Acquired Loans
Loans Receivable
Total	97,576,000			101,100,000
Real Estate Secured | Saehan Bancorp | Acquired Loans
Loans Receivable
Total	286,785,000			303,699,000
Commercial & Industrial
Loans Receivable
Total	772,291,000			613,322,000
Allowance for loan losses
Charge-offs	999,000	852,000	964,000
Recoveries on loans previously charged off	667,000	1,620,000	510,000
Commercial & Industrial | Accounting Standard Codification Topic 3, 1030 Loans
Non-covered loans:
Gross loans	42,000	75,000	413,000	75,000
Commercial & Industrial | Deteriorated Loans
Non-covered loans:
Gross loans	42,000	75,000		75,000
Allowance for losses on loans	3,000	33,000		33,000
Commercial & Industrial | Legacy Loans
Loans Receivable
Total	735,225,000			571,294,000
Commercial & Industrial | Mirae Bank | Acquired Loans
Loans Receivable
Total	1,560,000			2,607,000
Commercial & Industrial | Bank Asiana | Acquired Loans
Loans Receivable
Total	18,793,000			20,749,000
Commercial & Industrial | Saehan Bancorp | Acquired Loans
Loans Receivable
Total	16,713,000			18,672,000
Commercial and Industrial Lines of Credit Loan | Minimum
Distribution and Percentage Composition of Allowance for Loan Losses
Debt repayment period	10 days
Commercial and Industrial Lines of Credit Loan | Maximum
Distribution and Percentage Composition of Allowance for Loan Losses
Loan maturity period	1 year
Debt repayment period	30 days
Commercial and Industrial Business Term Loan | Minimum
Distribution and Percentage Composition of Allowance for Loan Losses
Loan maturity period	1 year
Commercial and Industrial Business Term Loan | Maximum
Distribution and Percentage Composition of Allowance for Loan Losses
Loan maturity period	7 years
Consumer
Loans Receivable
Total	15,499,000			21,069,000
Allowance for loan losses
Charge-offs			1,000
Recoveries on loans previously charged off	10,000	2,000
Consumer | Legacy Loans
Loans Receivable
Total	15,026,000			20,423,000
Consumer | Saehan Bancorp | Acquired Loans
Loans Receivable
Total	$473,000			$646,000

Loans_Details_2

Loans (Details 2) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Distribution and Percentage Composition of Allowance for Loan Losses
Reserve	$48,170	$48,624	$53,116	$53,464	$53,563
Loans Receivable	3,522,948	3,318,227
Percentage Composition of Allowance for Loan Losses	1.37%	1.47%
Loans Receivable Held For Sale
Distribution and Percentage Composition of Allowance for Loan Losses
Loans Receivable	$10,200	$11,800

Loans_Details_3

Loans (Details 3) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Allowance for loan losses
Balances at beginning of period	$48,624	$53,116	$53,563
Total charge-offs	-1,324	-6,313	-1,637
Total recoveries	870	1,821	1,538
Balances at end of period	48,170	48,624	53,464
Construction
Allowance for loan losses
Balances at beginning of period	220		814
Provision (credit) for losses on loans	48		-23
Balances at end of period	268		791
Real Estate Secured
Allowance for loan losses
Balances at beginning of period	31,889		41,401
Total charge-offs	-325		-672
Total recoveries	193		1,028
Provision (credit) for losses on loans	-685		-2,593
Balances at end of period	31,072		39,164
Commercial & Industrial
Allowance for loan losses
Balances at beginning of period	16,302		11,238
Total charge-offs	-999		-964
Total recoveries	667		510
Provision (credit) for losses on loans	697		2,569
Balances at end of period	16,667		13,353
Consumer
Allowance for loan losses
Balances at beginning of period	213		110
Total charge-offs			-1
Total recoveries	10
Provision (credit) for losses on loans	-60		47
Balances at end of period	$163		$156

Loans_Details_4

Loans (Details 4) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Loans
Maximum Past Due Period for Considering Loans as Pass Loans	30 days
Recorded impaired loans (net of SBA guaranteed portions) with specific reserves	$18,451,000	$21,892,000
Total allowance for loan losses	48,170,000	48,624,000	53,116,000	53,464,000	53,563,000
Breakdown of allowance by specific valuation and general valuation allowance
Impaired loans	69,593,000	69,881,000
Specific valuation allowance	6,859,000	9,009,000
Coverage ratio (as a percent)	9.86%	12.89%
Non-impaired loans	3,453,355,000	3,248,346,000
General valuation allowance	41,311,000	39,615,000
Coverage ratio (as a percent)	1.20%	1.22%
Loans Receivable	3,522,948,000	3,318,227,000
Loans receivable, allowance for loan losses (in dollars)	48,170,000	48,624,000	53,116,000	53,464,000	53,563,000
Allowance coverage ratio	1.37	1.47
Total balance of net of SBA guaranteed portions	65,500,000	65,600,000
Construction
Loans
Total allowance for loan losses	268,000	220,000		791,000	814,000
Breakdown of allowance by specific valuation and general valuation allowance
Coverage ratio (as a percent)	0.00%	0.00%
Non-impaired loans	27,532,000	22,635,000
General valuation allowance	268,000	220,000
Coverage ratio (as a percent)	0.97%	0.97%
Loans Receivable	27,532,000	22,635,000
Loans receivable, allowance for loan losses (in dollars)	268,000	220,000		791,000	814,000
Allowance coverage ratio	0.97	0.97
Real Estate Secured
Loans
Total allowance for loan losses	31,072,000	31,889,000		39,164,000	41,401,000
Breakdown of allowance by specific valuation and general valuation allowance
Impaired loans	54,014,000	52,510,000
Specific valuation allowance	1,054,000	1,886,000
Coverage ratio (as a percent)	1.95%	3.59%
Non-impaired loans	2,654,800,000	2,609,619,000
General valuation allowance	30,018,000	30,003,000
Coverage ratio (as a percent)	1.13%	1.15%
Loans Receivable	2,708,814,000	2,662,129,000
Loans receivable, allowance for loan losses (in dollars)	31,072,000	31,889,000		39,164,000	41,401,000
Allowance coverage ratio	1.15	1.2
Commercial & Industrial
Loans
Total allowance for loan losses	16,667,000	16,302,000		13,353,000	11,238,000
Breakdown of allowance by specific valuation and general valuation allowance
Impaired loans	15,579,000	17,371,000
Specific valuation allowance	5,805,000	7,123,000
Coverage ratio (as a percent)	37.26%	41.01%
Non-impaired loans	755,524,000	595,023,000
General valuation allowance	10,862,000	9,179,000
Coverage ratio (as a percent)	1.44%	1.54%
Loans Receivable	771,103,000	612,394,000
Loans receivable, allowance for loan losses (in dollars)	16,667,000	16,302,000		13,353,000	11,238,000
Allowance coverage ratio	2.16	2.66
Consumer
Loans
Total allowance for loan losses	163,000	213,000		156,000	110,000
Breakdown of allowance by specific valuation and general valuation allowance
Coverage ratio (as a percent)	0.00%	0.00%
Non-impaired loans	15,499,000	21,069,000
General valuation allowance	163,000	213,000
Coverage ratio (as a percent)	1.05%	1.01%
Loans Receivable	15,499,000	21,069,000
Loans receivable, allowance for loan losses (in dollars)	$163,000	$213,000		$156,000	$110,000
Allowance coverage ratio	1.05	1.01

Loans_Details_5

Loans (Details 5) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Impaired loans broken down by those with and without specific reserves
Recorded Investment, With Specific Reserves, Without Charge-Offs	$17,387	$21,597
Recorded Investment, With Specific Reserves, With Charge-Offs	1,064	295
Recorded Investment, Without Specific Reserves, Without Charge-Offs	38,835	31,335
Recorded Investment, Without Specific Reserves, With Charge-Offs	12,307	16,654
Total	69,593	69,881
Allowance on Impaired Loans	-6,859	-9,009
Impaired Loans Net of Allowance	62,734	60,872
Total Balance
With Specific Reserves	18,451	21,892
Without Specific Reserves	51,142	47,989
Total	69,593	69,881
Related Allowance
Related Allowance	6,859	9,009
Average Balance
With Specific Reserves	19,572	25,425
Without Specific Reserves	58,264	51,052
Total	77,836	76,477
Real Estate Secured | Residential mortgage
Impaired loans broken down by those with and without specific reserves
Allowance on Impaired Loans		-6
Total Balance
With Specific Reserves		272
Without Specific Reserves	668	561
Related Allowance
Related Allowance		6
Average Balance
With Specific Reserves		379
Without Specific Reserves	840	580
Real Estate Secured | SBA Real Estate
Impaired loans broken down by those with and without specific reserves
Allowance on Impaired Loans	-327	-310
Total Balance
With Specific Reserves	1,431	1,145
Without Specific Reserves	7,025	7,781
Related Allowance
Related Allowance	327	310
Average Balance
With Specific Reserves	1,704	1,220
Without Specific Reserves	10,268	6,336
Real Estate Secured | Gas Station
Impaired loans broken down by those with and without specific reserves
Allowance on Impaired Loans		-65
Total Balance
With Specific Reserves		640
Without Specific Reserves	5,302	4,765
Related Allowance
Related Allowance		65
Average Balance
With Specific Reserves		650
Without Specific Reserves	5,807	5,086
Real Estate Secured | Carwash
Total Balance
Without Specific Reserves	5,397	5,626
Average Balance
Without Specific Reserves	5,548	6,128
Real Estate Secured | Hotel/Motel
Impaired loans broken down by those with and without specific reserves
Allowance on Impaired Loans	-22	-469
Total Balance
With Specific Reserves	230	2,104
Without Specific Reserves	5,581	3,629
Related Allowance
Related Allowance	22	469
Average Balance
With Specific Reserves	232	2,068
Without Specific Reserves	5,858	3,873
Real Estate Secured | Land
Total Balance
Without Specific Reserves		258
Average Balance
Without Specific Reserves		262
Real Estate Secured | Other
Impaired loans broken down by those with and without specific reserves
Allowance on Impaired Loans	-705	-1,036
Total Balance
With Specific Reserves	6,385	5,950
Without Specific Reserves	21,995	19,779
Related Allowance
Related Allowance	705	1,036
Average Balance
With Specific Reserves	6,404	6,051
Without Specific Reserves	24,314	22,551
Commercial & Industrial | SBA Commercial
Impaired loans broken down by those with and without specific reserves
Allowance on Impaired Loans	-725	-725
Total Balance
With Specific Reserves	884	941
Without Specific Reserves	537	446
Related Allowance
Related Allowance	725	725
Average Balance
With Specific Reserves	1,260	1,041
Without Specific Reserves	692	516
Commercial & Industrial | Other Commercial
Impaired loans broken down by those with and without specific reserves
Allowance on Impaired Loans	-5,080	-6,398
Total Balance
With Specific Reserves	9,521	10,840
Without Specific Reserves	4,637	5,144
Related Allowance
Related Allowance	5,080	6,398
Average Balance
With Specific Reserves	9,972	14,016
Without Specific Reserves	$4,937	$5,720

Loans_Details_6

Loans (Details 6) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	$7,953,000	$5,707,000
60-89 Days Past Due	2,272,000	2,971,000
90 Days or More Past Due	13,246,000	17,503,000
Total Past Due	23,471,000	26,181,000
Total Past Due, SBA guaranteed portions	6,200,000	7,700,000
Non-performing loans
Non-Accrual Loans	32,522,000	37,265,000
Total Non-Performing Loans	180,273,000	171,163,000
Additional interest income from non-accrual loans	0		0
Additional interest income that would have been recorded if nonperforming loans had been paid in accordance with their original terms	111,000		419,000
Cash basis income recognized from impaired loans	390,000	1,400,000	465,000
Legacy Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	5,432,000	4,321,000
60-89 Days Past Due	1,461,000	2,403,000
90 Days or More Past Due	10,879,000	12,226,000
Total Past Due	17,772,000	18,950,000
Non-performing loans
Non-Accrual Loans	24,186,000	24,763,000
Total Non-Performing Loans	135,973,000	120,956,000
Acquired Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	2,521,000	1,386,000
60-89 Days Past Due	811,000	568,000
90 Days or More Past Due	2,367,000	5,277,000
Total Past Due	5,699,000	7,231,000
Non-performing loans
Non-Accrual Loans	8,336,000	12,502,000
Total Non-Performing Loans	44,300,000	50,207,000
Nonperforming Financing Receivable
Non-performing loans
Total Non-Performing Loans	32,522,000	37,265,000
Nonperforming Financing Receivable | Legacy Loans
Non-performing loans
Total Non-Performing Loans	24,186,000	24,763,000
Nonperforming Financing Receivable | Acquired Loans
Non-performing loans
Total Non-Performing Loans	8,336,000	12,502,000
Nonaccrual Financing Receivable
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	578,000	542,000
60-89 Days Past Due	1,851,000	1,150,000
90 Days or More Past Due	13,246,000	17,503,000
Total Past Due	15,675,000	19,195,000
Nonaccrual Financing Receivable | Legacy Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	378,000	116,000
60-89 Days Past Due	1,394,000	904,000
90 Days or More Past Due	10,879,000	12,226,000
Total Past Due	12,651,000	13,246,000
Nonaccrual Financing Receivable | Acquired Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	200,000	426,000
60-89 Days Past Due	457,000	246,000
90 Days or More Past Due	2,367,000	5,277,000
Total Past Due	3,024,000	5,949,000
Real Estate Secured | Residential mortgage | Legacy Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	978,000	454,000
60-89 Days Past Due	138,000	280,000
90 Days or More Past Due	602,000	449,000
Total Past Due	1,718,000	1,183,000
Non-performing loans
Non-Accrual Loans	1,086,000	784,000
Total Non-Performing Loans	2,204,000	1,908,000
Real Estate Secured | Residential mortgage | Acquired Loans
Non-accrual loans and loans 90 days or more past due and still accruing
90 Days or More Past Due	135,000	134,000
Total Past Due	135,000	134,000
Non-performing loans
Non-Accrual Loans	135,000	134,000
Total Non-Performing Loans	135,000	134,000
Real Estate Secured | Residential mortgage | Nonperforming Financing Receivable | Legacy Loans
Non-performing loans
Total Non-Performing Loans	1,086,000	784,000
Real Estate Secured | Residential mortgage | Nonperforming Financing Receivable | Acquired Loans
Non-performing loans
Total Non-Performing Loans	135,000	134,000
Real Estate Secured | SBA Real Estate | Legacy Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	2,209,000	1,623,000
60-89 Days Past Due		129,000
90 Days or More Past Due	354,000	399,000
Total Past Due	2,563,000	2,151,000
Non-performing loans
Non-Accrual Loans	685,000	632,000
Total Non-Performing Loans	10,121,000	8,891,000
Real Estate Secured | SBA Real Estate | Acquired Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	173,000	262,000
60-89 Days Past Due	567,000
90 Days or More Past Due	41,000	105,000
Total Past Due	781,000	367,000
Non-performing loans
Non-Accrual Loans	1,566,000	1,828,000
Total Non-Performing Loans	6,999,000	6,838,000
Real Estate Secured | SBA Real Estate | Nonperforming Financing Receivable | Legacy Loans
Non-performing loans
Total Non-Performing Loans	685,000	632,000
Real Estate Secured | SBA Real Estate | Nonperforming Financing Receivable | Acquired Loans
Non-performing loans
Total Non-Performing Loans	1,566,000	1,828,000
Real Estate Secured | Gas Station | Legacy Loans
Non-performing loans
Non-Accrual Loans		28,000
Total Non-Performing Loans	6,839,000	6,920,000
Real Estate Secured | Gas Station | Acquired Loans
Non-performing loans
Non-Accrual Loans	2,165,000	2,185,000
Total Non-Performing Loans	3,600,000	3,632,000
Real Estate Secured | Gas Station | Nonperforming Financing Receivable | Legacy Loans
Non-performing loans
Total Non-Performing Loans		28,000
Real Estate Secured | Gas Station | Nonperforming Financing Receivable | Acquired Loans
Non-performing loans
Total Non-Performing Loans	2,165,000	2,185,000
Real Estate Secured | Carwash | Legacy Loans
Non-accrual loans and loans 90 days or more past due and still accruing
90 Days or More Past Due	770,000	770,000
Total Past Due	770,000	770,000
Non-performing loans
Non-Accrual Loans	2,416,000	2,629,000
Total Non-Performing Loans	10,878,000	9,429,000
Real Estate Secured | Carwash | Acquired Loans
Non-performing loans
Total Non-Performing Loans	94,000	8,480,000
Real Estate Secured | Carwash | Nonperforming Financing Receivable | Legacy Loans
Non-performing loans
Total Non-Performing Loans	2,416,000	2,629,000
Real Estate Secured | Hotel/Motel | Legacy Loans
Non-accrual loans and loans 90 days or more past due and still accruing
90 Days or More Past Due	1,102,000	1,162,000
Total Past Due	1,102,000	1,162,000
Non-performing loans
Non-Accrual Loans	2,251,000	2,328,000
Total Non-Performing Loans	3,894,000	3,985,000
Real Estate Secured | Hotel/Motel | Acquired Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due		232,000
90 Days or More Past Due	230,000
Total Past Due	230,000	232,000
Non-performing loans
Non-Accrual Loans	932,000	718,000
Total Non-Performing Loans	4,316,000	4,364,000
Real Estate Secured | Hotel/Motel | Nonperforming Financing Receivable | Legacy Loans
Non-performing loans
Total Non-Performing Loans	2,251,000	2,328,000
Real Estate Secured | Hotel/Motel | Nonperforming Financing Receivable | Acquired Loans
Non-performing loans
Total Non-Performing Loans	932,000	718,000
Real Estate Secured | Other | Legacy Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	1,418,000	770,000
60-89 Days Past Due		1,027,000
90 Days or More Past Due	6,958,000	9,030,000
Total Past Due	8,376,000	10,827,000
Non-performing loans
Non-Accrual Loans	11,487,000	12,852,000
Total Non-Performing Loans	62,587,000	54,116,000
Real Estate Secured | Other | Acquired Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	1,554,000	188,000
60-89 Days Past Due		246,000
90 Days or More Past Due	1,550,000	3,030,000
Total Past Due	3,104,000	3,464,000
Non-performing loans
Non-Accrual Loans	2,606,000	5,429,000
Total Non-Performing Loans	24,147,000	20,942,000
Real Estate Secured | Other | Nonperforming Financing Receivable | Legacy Loans
Non-performing loans
Total Non-Performing Loans	11,487,000	12,852,000
Real Estate Secured | Other | Nonperforming Financing Receivable | Acquired Loans
Non-performing loans
Total Non-Performing Loans	2,606,000	5,429,000
Real Estate Secured | Land | Legacy Loans
Non-performing loans
Total Non-Performing Loans		258,000
Commercial & Industrial | SBA Commercial
Non-performing loans
Total Non-Accrual Loans, SBA guaranteed portions	7,500,000	8,500,000
Commercial & Industrial | SBA Commercial | Legacy Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	806,000	193,000
60-89 Days Past Due		369,000
90 Days or More Past Due	175,000
Total Past Due	981,000	562,000
Non-performing loans
Non-Accrual Loans	373,000	360,000
Total Non-Performing Loans	3,773,000	2,835,000
Commercial & Industrial | SBA Commercial | Acquired Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	87,000	176,000
60-89 Days Past Due		22,000
90 Days or More Past Due	199,000
Total Past Due	286,000	198,000
Non-performing loans
Non-Accrual Loans	232,000	42,000
Total Non-Performing Loans	1,504,000	1,292,000
Commercial & Industrial | SBA Commercial | Nonperforming Financing Receivable | Legacy Loans
Non-performing loans
Total Non-Performing Loans	373,000	360,000
Commercial & Industrial | SBA Commercial | Nonperforming Financing Receivable | Acquired Loans
Non-performing loans
Total Non-Performing Loans	232,000	42,000
Commercial & Industrial | Other Commercial | Legacy Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	21,000	1,281,000
60-89 Days Past Due	1,323,000	598,000
90 Days or More Past Due	918,000	416,000
Total Past Due	2,262,000	2,295,000
Non-performing loans
Non-Accrual Loans	5,888,000	5,150,000
Total Non-Performing Loans	35,676,000	32,613,000
Commercial & Industrial | Other Commercial | Acquired Loans
Non-accrual loans and loans 90 days or more past due and still accruing
30-59 Days Past Due	707,000	528,000
60-89 Days Past Due	244,000	300,000
90 Days or More Past Due	212,000	2,008,000
Total Past Due	1,163,000	2,836,000
Non-performing loans
Non-Accrual Loans	700,000	2,166,000
Total Non-Performing Loans	3,378,000	4,394,000
Commercial & Industrial | Other Commercial | Nonperforming Financing Receivable | Legacy Loans
Non-performing loans
Total Non-Performing Loans	5,888,000	5,150,000
Commercial & Industrial | Other Commercial | Nonperforming Financing Receivable | Acquired Loans
Non-performing loans
Total Non-Performing Loans	700,000	2,166,000
Consumer | Legacy Loans
Non-performing loans
Total Non-Performing Loans	1,000	1,000
Consumer | Acquired Loans
Non-performing loans
Total Non-Performing Loans	$127,000	$131,000

Loans_Details_7

Loans (Details 7) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Loans with classification of special mention, substandard and doubtful by loan type
Loans	$180,273,000	$171,163,000
Loans, SBA guaranteed portions	14,900,000	11,200,000
Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	135,973,000	120,956,000
Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	44,300,000	50,207,000
Real Estate Secured | Residential mortgage | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	2,204,000	1,908,000
Real Estate Secured | Residential mortgage | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	135,000	134,000
Real Estate Secured | SBA Real Estate | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	10,121,000	8,891,000
Real Estate Secured | SBA Real Estate | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	6,999,000	6,838,000
Real Estate Secured | Gas Station | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	6,839,000	6,920,000
Real Estate Secured | Gas Station | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	3,600,000	3,632,000
Real Estate Secured | Carwash | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	10,878,000	9,429,000
Real Estate Secured | Carwash | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	94,000	8,480,000
Real Estate Secured | Hotel/Motel | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	3,894,000	3,985,000
Real Estate Secured | Hotel/Motel | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	4,316,000	4,364,000
Real Estate Secured | Land | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans		258,000
Real Estate Secured | Other | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	62,587,000	54,116,000
Real Estate Secured | Other | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	24,147,000	20,942,000
Commercial & Industrial | SBA Commercial | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	3,773,000	2,835,000
Commercial & Industrial | SBA Commercial | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	1,504,000	1,292,000
Commercial & Industrial | Other Commercial | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	35,676,000	32,613,000
Commercial & Industrial | Other Commercial | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	3,378,000	4,394,000
Consumer | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	1,000	1,000
Consumer | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	127,000	131,000
Special Mention
Loans with classification of special mention, substandard and doubtful by loan type
Loans	81,049,000	76,906,000
Special Mention | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	61,355,000	52,919,000
Special Mention | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	19,694,000	23,987,000
Special Mention | Real Estate Secured | SBA Real Estate | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	3,190,000	2,860,000
Special Mention | Real Estate Secured | SBA Real Estate | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	2,386,000	2,400,000
Special Mention | Real Estate Secured | Gas Station | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	1,117,000	1,126,000
Special Mention | Real Estate Secured | Gas Station | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	639,000	645,000
Special Mention | Real Estate Secured | Carwash | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	8,462,000	6,800,000
Special Mention | Real Estate Secured | Carwash | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	94,000	8,480,000
Special Mention | Real Estate Secured | Hotel/Motel | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	1,196,000	1,207,000
Special Mention | Real Estate Secured | Land | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans		258,000
Special Mention | Real Estate Secured | Other | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	30,037,000	28,064,000
Special Mention | Real Estate Secured | Other | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	14,371,000	10,503,000
Special Mention | Commercial & Industrial | SBA Commercial | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	1,739,000	690,000
Special Mention | Commercial & Industrial | SBA Commercial | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	403,000	653,000
Special Mention | Commercial & Industrial | Other Commercial | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	15,614,000	11,914,000
Special Mention | Commercial & Industrial | Other Commercial | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	1,674,000	1,175,000
Special Mention | Consumer | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	127,000	131,000
Substandard
Loans with classification of special mention, substandard and doubtful by loan type
Loans	89,402,000	82,305,000
Substandard | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	64,997,000	56,393,000
Substandard | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	24,405,000	25,912,000
Substandard | Real Estate Secured | Residential mortgage | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	2,204,000	1,636,000
Substandard | Real Estate Secured | Residential mortgage | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	135,000	134,000
Substandard | Real Estate Secured | SBA Real Estate | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	6,746,000	5,842,000
Substandard | Real Estate Secured | SBA Real Estate | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	4,572,000	4,397,000
Substandard | Real Estate Secured | Gas Station | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	5,722,000	5,794,000
Substandard | Real Estate Secured | Gas Station | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	2,961,000	2,987,000
Substandard | Real Estate Secured | Carwash | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	1,646,000	1,859,000
Substandard | Real Estate Secured | Hotel/Motel | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	1,596,000	1,616,000
Substandard | Real Estate Secured | Hotel/Motel | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	4,316,000	4,364,000
Substandard | Real Estate Secured | Other | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	24,986,000	16,801,000
Substandard | Real Estate Secured | Other | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	9,616,000	10,279,000
Substandard | Commercial & Industrial | SBA Commercial | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	2,034,000	2,145,000
Substandard | Commercial & Industrial | SBA Commercial | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	1,101,000	639,000
Substandard | Commercial & Industrial | Other Commercial | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	20,062,000	20,699,000
Substandard | Commercial & Industrial | Other Commercial | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	1,704,000	3,112,000
Substandard | Consumer | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	1,000	1,000
Doubtful
Loans with classification of special mention, substandard and doubtful by loan type
Loans	9,822,000	11,952,000
Doubtful | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	9,621,000	11,644,000
Doubtful | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	201,000	308,000
Doubtful | Real Estate Secured | Residential mortgage | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans		272,000
Doubtful | Real Estate Secured | SBA Real Estate | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	185,000	189,000
Doubtful | Real Estate Secured | SBA Real Estate | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	41,000	41,000
Doubtful | Real Estate Secured | Carwash | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	770,000	770,000
Doubtful | Real Estate Secured | Hotel/Motel | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	1,102,000	1,162,000
Doubtful | Real Estate Secured | Other | Legacy Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	7,564,000	9,251,000
Doubtful | Real Estate Secured | Other | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans	160,000	160,000
Doubtful | Commercial & Industrial | Other Commercial | Acquired Loans
Loans with classification of special mention, substandard and doubtful by loan type
Loans		$107,000

Loans_Details_8

Loans (Details 8) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
	item	item	item
Roll-forward of TDR loans
Balance at Beginning of Period	$37,110,000	$42,738,000	$36,220,000
New TDR Loans Added	5,767,000	1,540,000	5,010,000
Reductions Due to Sales	-991,000	-4,308,000
TDR Loans Paid Off	-742,000	-354,000
Reductions Due to Charge-Offs	-136,000	-1,084,000	-438,000
Other Changes (Payments, Amortization, & Other)	-714,000	-1,422,000	-664,000
Balance at End of Period	40,294,000	37,110,000	40,128,000
Total TDRs	40,294,000	37,110,000	40,128,000
SBA guaranteed portion of total recorded investment of TDR loans	1,300,000	1,600,000
Pre-modification and post-modification balances and types of concession given for newly modified TDR loans
Pre-Modification Balance:	5,782,000	1,430,000	5,017,000
Post-Modification Balance:	5,767,000	1,508,000	5,010,000
Number of Loans	8	3	8
TDR loans modified during the past 12 months that had a payment default during current period
Pre-Modification Balance:	1,145,000	25,000	420,000
Post-Modification Balance:	1,107,000	24,000	417,000
Number of loans	2	1	2
Minimum
Roll-forward of TDR loans
Delinquent period of TDRs to be considered as non-performing	90 days
Pre-modification and post-modification balances and types of concession given for newly modified TDR loans
Period of interest only payment concessions	3 months
Maximum
Pre-modification and post-modification balances and types of concession given for newly modified TDR loans
Period of interest only payment concessions	6 months
Principal Concession
Roll-forward of TDR loans
Balance at Beginning of Period	19,087,000
Balance at End of Period	17,090,000	19,087,000
Total TDRs	17,090,000	19,087,000
Pre-modification and post-modification balances and types of concession given for newly modified TDR loans
Pre-Modification Balance:	20,000		41,000
Post-Modification Balance:	20,000		41,000
Number of Loans	1		2
TDR loans modified during the past 12 months that had a payment default during current period
Pre-Modification Balance:	1,121,000	25,000	420,000
Post-Modification Balance:	1,107,000	24,000	417,000
Number of loans	1	1	2
Term or Maturity Concession
Roll-forward of TDR loans
Balance at Beginning of Period	15,279,000
Balance at End of Period	20,152,000	15,279,000
Total TDRs	20,152,000	15,279,000
Pre-modification and post-modification balances and types of concession given for newly modified TDR loans
Pre-Modification Balance:	5,360,000	1,430,000	641,000
Post-Modification Balance:	5,345,000	1,508,000	634,000
Number of Loans	6	3	5
TDR loans modified during the past 12 months that had a payment default during current period
Pre-Modification Balance:	24,000
Number of loans	1
Interest Rate Concession
Roll-forward of TDR loans
Balance at Beginning of Period	2,744,000
Balance at End of Period	3,052,000
Total TDRs	3,052,000
Pre-modification and post-modification balances and types of concession given for newly modified TDR loans
Pre-Modification Balance:	402,000		4,335,000
Post-Modification Balance:	402,000		4,335,000
Number of Loans	1		1
Nonaccrual Financing Receivable
Roll-forward of TDR loans
Balance at End of Period	7,500,000	9,500,000
Total TDRs	7,500,000	9,500,000
Performing Financing Receivable
Roll-forward of TDR loans
Balance at End of Period	32,800,000	27,600,000
Total TDRs	32,800,000	27,600,000
Real Estate Secured
Roll-forward of TDR loans
Balance at Beginning of Period	25,096,000
Balance at End of Period	28,612,000	25,096,000
Total TDRs	28,612,000	25,096,000
Pre-modification and post-modification balances and types of concession given for newly modified TDR loans
Pre-Modification Balance:	5,337,000	239,000	4,871,000
Post-Modification Balance:	5,323,000	284,000	4,868,000
Number of Loans	3	1	3
TDR loans modified during the past 12 months that had a payment default during current period
Pre-Modification Balance:			417,000
Post-Modification Balance:			414,000
Number of loans			1
Real Estate Secured | Principal Concession
Roll-forward of TDR loans
Balance at End of Period	14,745,000	16,431,000
Total TDRs	14,745,000	16,431,000
TDR loans modified during the past 12 months that had a payment default during current period
Pre-Modification Balance:			417,000
Post-Modification Balance:			414,000
Number of loans			1
Real Estate Secured | Term or Maturity Concession
Roll-forward of TDR loans
Balance at Beginning of Period	7,890,000
Balance at End of Period	12,698,000	7,890,000
Total TDRs	12,698,000	7,890,000
Pre-modification and post-modification balances and types of concession given for newly modified TDR loans
Pre-Modification Balance:	4,935,000	239,000	536,000
Post-Modification Balance:	4,921,000	284,000	533,000
Number of Loans	2	1	2
Real Estate Secured | Interest Rate Concession
Roll-forward of TDR loans
Balance at Beginning of Period	775,000
Balance at End of Period	1,169,000
Total TDRs	1,169,000
Pre-modification and post-modification balances and types of concession given for newly modified TDR loans
Pre-Modification Balance:	402,000		4,335,000
Post-Modification Balance:	402,000		4,335,000
Number of Loans	1		1
Commercial & Industrial
Roll-forward of TDR loans
Balance at Beginning of Period	12,014,000
Balance at End of Period	11,682,000	12,014,000
Total TDRs	11,682,000	12,014,000
Pre-modification and post-modification balances and types of concession given for newly modified TDR loans
Pre-Modification Balance:	445,000	1,191,000	146,000
Post-Modification Balance:	444,000	1,224,000	142,000
Number of Loans	5	2	5
TDR loans modified during the past 12 months that had a payment default during current period
Pre-Modification Balance:	1,145,000	25,000	3,000
Post-Modification Balance:	1,107,000	24,000	3,000
Number of loans	2	1	1
Commercial & Industrial | Principal Concession
Roll-forward of TDR loans
Balance at Beginning of Period	2,656,000
Balance at End of Period	2,345,000	2,656,000
Total TDRs	2,345,000	2,656,000
Pre-modification and post-modification balances and types of concession given for newly modified TDR loans
Pre-Modification Balance:	20,000		41,000
Post-Modification Balance:	20,000		41,000
Number of Loans	1		2
TDR loans modified during the past 12 months that had a payment default during current period
Pre-Modification Balance:	1,121,000	25,000	3,000
Post-Modification Balance:	1,107,000	24,000	3,000
Number of loans	1	1	1
Commercial & Industrial | Term or Maturity Concession
Roll-forward of TDR loans
Balance at Beginning of Period	7,389,000
Balance at End of Period	7,454,000	7,389,000
Total TDRs	7,454,000	7,389,000
Pre-modification and post-modification balances and types of concession given for newly modified TDR loans
Pre-Modification Balance:	425,000	1,191,000	105,000
Post-Modification Balance:	424,000	1,224,000	101,000
Number of Loans	4	2	3
TDR loans modified during the past 12 months that had a payment default during current period
Pre-Modification Balance:	24,000
Number of loans	1
Commercial & Industrial | Interest Rate Concession
Roll-forward of TDR loans
Balance at End of Period	1,883,000	1,969,000
Total TDRs	$1,883,000	$1,969,000

Shareholders_Equity_Details

Shareholders' Equity (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Numerator:
Net income	$18,619	$13,113
Denominator for basic earnings per share:
Weighted-average shares	78,326,505	78,115,779
Effect of dilutive securities:
Stock option dilution (in shares)	328,860	380,327
Denominator for diluted earnings per share:
Adjusted weighted-average shares and assumed conversions	78,655,365	78,496,106
EARNINGS PER COMMON SHARE INFORMATION:
Basic earnings per common share (in dollars per share)	$0.24	$0.17
Diluted earnings per common share (in dollars per share)	$0.24	$0.17
Antidilutive stock option awards excluded from earnings per common share calculation (in shares)	252,900	269,000

FHLB_Advances_and_Junior_Subor2

FHLB Advances and Junior Subordinated Debentures (Details) (USD $)	3 Months Ended	12 Months Ended	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014
FHLB borrowings
Maximum FHLB advances as a percentage of total assets based on qualifying collateral	30.00%
Borrowing outstanding	$150,000,000	$150,000,000
Rate (as a percent)	0.66%	0.68%
Average balance during the quarter	150,000,000	150,000,000
Maximum month-end balance during the year	150,000,000	150,000,000
Average interest rate during the year (as a percent)	0.63%	0.63%
Federal Home Loan Bank Advances Issued 26 December 2012
FHLB borrowings
Borrowing outstanding	100,000,000
Rate (as a percent)	0.24%
Federal Home Loan Bank Advances Issued 22 September 2014
FHLB borrowings
Borrowing outstanding	50,000,000
Interest rate (as a percent)	1.24%		1.24%
Rate (as a percent)	1.51%
Standard Credit Program
FHLB borrowings
Actual borrowing capacity	1,190,000,000
Borrowing outstanding	150,000,000
Remaining capacity	1,040,000,000
Rate (as a percent)	0.66%
Federal Home Loan Bank Adjustable Rate Advance | Federal Home Loan Bank Advances Issued 22 September 2014
FHLB borrowings
Borrowing outstanding			50,000,000
Term of debt			5 years
Interest Rate base			three month LIBOR
Interest rate (as a percent)	1.51%
Interest rate cap (as a percent)			1.00%
Maximum debt interest rate (as a percent)			2.48%
Federal Home Loan Bank Variable Rate Advance
FHLB borrowings
Borrowing outstanding			100,000,000
Federal Home Loan Bank Forward Commitment
FHLB borrowings
Borrowing outstanding			$100,000,000
Term of debt			4 years
Interest rate (as a percent)	2.48%

FHLB_Advances_and_Junior_Subor3

FHLB Advances and Junior Subordinated Debentures (Details 2) (USD $)	12 Months Ended	3 Months Ended
	Dec. 31, 2007	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2005	Nov. 20, 2013	Mar. 31, 2007
Junior subordinated debentures
Junior subordinated debentures		$71,837,000	$71,779,000
Junior Subordinated Debt
Junior subordinated debentures
Junior subordinated debentures		71,837,000
Junior subordinated debentures issued				77,300,000
Amount of trust preferred securities issued	75,000,000
Junior Subordinated Debt | Wilshire Statutory Trust II
Junior subordinated debentures
Junior subordinated debentures		20,619,000
Interest Rate base		3 Month LIBOR
Interest Rate margin (as a percent)		1.79%
Current Rate (as a percent)		2.06%
Right to redeem debentures		20,600,000
Junior Subordinated Debt | Wilshire Statutory Trust III
Junior subordinated debentures
Junior subordinated debentures		15,464,000
Interest Rate base		3 Month LIBOR
Interest Rate margin (as a percent)		1.40%
Current Rate (as a percent)		1.67%
Right to redeem debentures		15,500,000
Junior Subordinated Debt | Wilshire Statutory Trust IV
Junior subordinated debentures
Junior subordinated debentures		25,774,000
Interest Rate base		3 Month LIBOR
Interest Rate margin (as a percent)		1.38%
Current Rate (as a percent)		1.65%
Right to redeem debentures		25,800,000
Junior Subordinated Debt | Saehan Capital Trust I
Junior subordinated debentures
Junior subordinated debentures		9,980,000			9,700,000
Junior subordinated debentures issued						20,600,000
Discount on junior subordinated debenture acquired					10,900,000
Interest Rate base		3 Month LIBOR
Interest Rate margin (as a percent)		1.62%
Current Rate (as a percent)		1.89%
Right to redeem debentures		$20,600,000

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Changes to accumulated other comprehensive income by components
Balance at beginning of period	$4,453	($23)
Other comprehensive income (loss) before reclassification	2,163	3,116
Reclassifications from other comprehensive income	0	0
Tax effect of current period changes	-904	-1,303
Current period changes net of taxes	1,259	1,813
Balance at end of period	5,712	1,790
Accumulated Net Unrealized Investment Gain (Loss)
Changes to accumulated other comprehensive income by components
Balance at beginning of period	4,649	192
Other comprehensive income (loss) before reclassification	2,148	3,122
Tax effect of current period changes	-903	-1,311
Current period changes net of taxes	1,245	1,811
Balance at end of period	5,894	2,003
Accumulated Net Unrealized Interest Only Strip Gain (Loss)
Changes to accumulated other comprehensive income by components
Balance at beginning of period	299	330
Other comprehensive income (loss) before reclassification	2	-19
Tax effect of current period changes	-1	8
Current period changes net of taxes	1	-11
Balance at end of period	300	319
Accumulated Unrecognized Prior Service Cost on Bank Owned Life Insurance
Changes to accumulated other comprehensive income by components
Balance at beginning of period	-495	-545
Other comprehensive income (loss) before reclassification	13	13
Current period changes net of taxes	13	13
Balance at end of period	($482)	($532)

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Contingencies
Total accrued loss contingencies for all legal claims	$135,000	$135,000	$305,000
Commitments to Extend Credit
Commitments and Contingencies
Commitments outstanding	380,831,000	391,728,000
Standby Letters of Credit
Commitments and Contingencies
Commitments outstanding	238,000	1,391,000
Commercial Letters of Credit
Commitments and Contingencies
Commitments outstanding	73,948,000	61,518,000
Commitments to Fund Investments in Affordable Housing Program Obligation
Commitments and Contingencies
Commitments outstanding	8,844,000	9,430,000
Lease Agreements
Commitments and Contingencies
Commitments outstanding	28,042,000	26,640,000
Interest rate lock commitments
Commitments and Contingencies
Commitments outstanding	41,886,000	0
Forward sale contracts related to mortgage banking | Commitment to borrowing from the FHLB
Commitments and Contingencies
Commitments outstanding	$32,928,000

Income_Tax_Provision_Details

Income Tax Provision (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Income Tax Provision
Income tax benefit	$10,230,000	$6,789,000
Pretax income	28,849,000	19,902,000
Effective tax rate (as a percent)	35.50%	34.10%
Unrecognized tax benefit	2,900,000		2,900,000
Uncertain tax positions	38,000
Interest expense associated with unrecognized tax benefits	9,000
Accrued interest payable associated with unrecognized tax benefits	$296,000		$287,000

Recent_Accounting_Pronouncemen1

Recent Accounting Pronouncements (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015
Recent Accounting Pronouncements
Realized tax credit from Affordable Housing Projects.	$1.40