Hope Bancorp (HOPE) 10-Q 1 Nov 19 2019 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Oct. 30, 2019
Cover page.
Title of 12(b) Security	Common Stock
Document Type	10-Q
Document Period End Date	Sep. 30, 2019
Entity File Number	000-50245
Entity Registrant Name	HOPE BANCORP INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	95-4849715
Entity Address, Address Line One	3200 Wilshire Boulevard, Suite 1400
Entity Address, City or Town	Los Angeles
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90010
City Area Code	213
Local Phone Number	639-1700
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Compnay	false
Entity Common Stock, Shares Outstanding		126,698,981
Document Quarterly Report	true
Document Transition Report	false
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001128361
Trading Symbol	HOPE
Security Exchange Name	NASDAQ

Consolidated Statements Of Fina

Consolidated Statements Of Financial Condition - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Cash and cash equivalents:
Cash and due from banks	$ 264,629,000	$ 219,366,000
Interest bearing cash in other banks	284,727,000	240,240,000
Total cash and cash equivalents	549,356,000	459,606,000
Interest bearing deposits in other financial institutions	30,387,000	29,409,000
Securities available for sale, at fair value	1,772,322,000	1,846,265,000
Equity investments	49,055,000	49,835,000
Loans held for sale, at the lower of cost or fair value	29,627,000	25,128,000
Loans receivable, net of allowance for loan losses of $93,882 and $92,557 at September 30, 2019 and December 31, 2018, respectively	12,010,800,000	12,005,558,000
Other real estate owned (“OREO”), net	19,374,000	7,754,000
Federal Home Loan Bank (“FHLB”) stock, at cost	19,406,000	25,461,000
Premises and equipment, net	52,604,000	53,794,000
Accrued interest receivable	29,743,000	32,225,000
Deferred tax assets, net	25,917,000	50,913,000
Customers’ liabilities on acceptances	1,125,000	2,281,000
Bank owned life insurance (“BOLI”)	75,968,000	75,219,000
Investments in affordable housing partnerships	84,290,000	92,040,000
Operating lease right-of-use assets, net	60,862,000	0
Goodwill	464,450,000	464,450,000
Core deposit intangible assets, net	12,390,000	14,061,000
Servicing assets, net	17,865,000	23,132,000
Other assets	74,337,000	48,821,000
Total assets	15,379,878,000	15,305,952,000
Deposits:
Noninterest bearing	3,033,371,000	3,022,633,000
Interest bearing:
Money market and NOW accounts	3,752,274,000	3,036,653,000
Savings deposits	259,454,000	225,746,000
Time deposits	5,189,651,000	5,870,624,000
Total deposits	12,234,750,000	12,155,656,000
Advances from Federal Home Loan Banks	625,000,000	821,280,000
Federal funds purchased	0	0
Convertible notes, net	198,211,000	194,543,000
Subordinated debentures, net	102,755,000	101,929,000
Accrued interest payable	38,197,000	31,374,000
Acceptances outstanding	1,125,000	2,281,000
Operating lease liabilities	62,498,000	0
Commitments to fund investments in affordable housing partnerships	32,635,000	46,507,000
Other liabilities	53,423,000	49,171,000
Total liabilities	13,348,594,000	13,402,741,000
STOCKHOLDERS’ EQUITY:
Common stock, $0.001 par value; authorized 150,000,000 shares at September 30, 2019 and December 31, 2018: issued and outstanding 135,700,378 and 126,697,925 shares, respectively, at September 30, 2019, and issued and outstanding 135,642,365 and 126,639,912 shares, respectively, at December 31, 2018	136,000	136,000
Additional paid-in capital	1,426,666,000	1,423,405,000
Retained earnings	737,209,000	662,375,000
Treasury stock, at cost; 9,002,453 shares at September 30, 2019 and December 31, 2018	(150,000,000)	(150,000,000)
Accumulated other comprehensive income (loss), net	17,273,000	(32,705,000)
Total stockholders’ equity	2,031,284,000	1,903,211,000
Total liabilities and stockholders’ equity	$ 15,379,878,000	$ 15,305,952,000

Consolidated Statements Of Fi_2

Consolidated Statements Of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Loans receivable, allowance	$ 93,882	$ 92,557
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	135,700,378	135,642,365
Common stock, shares outstanding	126,697,925	126,639,912
Treasury stock, at cost, shares repurchased	9,002,453	9,002,453

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
INTEREST INCOME:
Interest and fees on loans	$ 158,115	$ 153,366	$ 474,878	$ 437,497
Interest on securities	11,373	11,957	35,558	32,957
Interest on other investments	2,929	2,503	8,577	7,692
Total interest income	172,417	167,826	519,013	478,146
INTEREST EXPENSE:
Interest on deposits	49,057	37,022	144,730	92,481
Interest Expense Federal Home loan Bank Advance	3,112	3,703	9,110	11,453
Interest on other borrowings and convertible notes	3,990	3,954	12,086	8,178
Total interest expense	56,159	44,679	165,926	112,112
NET INTEREST INCOME BEFORE PROVISION FOR LOAN LOSSES	116,258	123,147	353,087	366,034
PROVISION FOR LOAN LOSSES	2,100	7,300	6,300	12,100
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	114,158	115,847	346,787	353,934
NONINTEREST INCOME:
Service fees on deposit accounts	4,690	4,569	13,423	13,983
International service fees	1,193	1,220	3,146	3,452
Loan servicing fees, net	189	852	1,656	3,441
Wire transfer fees	1,058	1,227	3,458	3,684
Net gains on sales of SBA loans	0	2,331	0	9,261
Net gains on sales of other loans	804	477	2,611	2,104
Net gains on sales and calls of securities available for sale	153	0	282	0
Other income and fees	4,908	2,771	12,128	12,641
Total noninterest income	12,995	13,447	36,704	48,566
NONINTEREST EXPENSE:
Salaries and employee benefits	41,607	36,969	121,333	116,929
Occupancy	7,703	7,837	23,219	22,494
Furniture and equipment	3,851	3,710	11,323	11,454
Advertising and marketing	2,377	1,986	6,684	7,022
Data processing and communications	2,821	3,513	8,364	10,582
Professional fees	5,241	3,950	16,580	11,530
Investments in affordable housing partnerships expenses	2,334	3,357	7,601	8,600
FDIC assessments	0	1,788	3,110	5,166
Credit related expenses	1,031	658	3,258	2,356
OREO (income) expense, net	(743)	(56)	(812)	(115)
Other	3,773	3,743	11,539	11,519
Total noninterest expense	69,995	67,455	212,199	207,537
INCOME BEFORE INCOME TAXES	57,158	61,839	171,292	194,963
INCOME TAX PROVISION	14,566	15,461	43,261	49,823
NET INCOME	$ 42,592	$ 46,378	$ 128,031	$ 145,140
EARNINGS PER COMMON SHARE
Basic (in dollars per share)	$ 0.34	$ 0.36	$ 1.01	$ 1.09
Diluted (in dollars per share)	$ 0.34	$ 0.36	$ 1.01	$ 1.09

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 0	$ 0	$ 0	$ 0
Net income	42,592,000	46,378,000	128,031,000	145,140,000
Other comprehensive income (loss):
Change in unrealized net holding gains (losses) on securities available for sale	14,160,000	(13,114,000)	71,349,000	(47,012,000)
Reclassification adjustments for net gains realized in net income	(153,000)	0	(282,000)	0
Tax effect	(4,157,000)	3,915,000	(21,089,000)	14,191,000
Other comprehensive income (loss), net of tax	9,850,000	(9,199,000)	49,978,000	(32,821,000)
Total comprehensive income	$ 52,442,000	$ 37,179,000	$ 178,009,000	$ 112,319,000

Consolidated Statements Of Chan

Consolidated Statements Of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Retained earnings	Treasury stock	Accumulated other comprehensive (loss) income, net
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01	$ (188)			$ (469)		$ 281
Balance at Dec. 31, 2017	1,928,255	$ 136	$ 1,405,014	544,886	$ 0	(21,781)
Balance, shares at Dec. 31, 2017		135,511,891
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations	466		466
Issuance of shares pursuant to various stock plans, shares		127,908
Stock-based compensation	2,160		2,160
Cash dividends declared on common stock ($0.40 per share)	(53,477)			(53,477)
Comprehensive income:
Net income	145,140			145,140
Other comprehensive income (loss)	(32,821)					(32,821)
Repurchase of treasury stock, shares		(5,565,696)
Repurchase of treasury stock	(100,000)				(100,000)
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt			15,045
Equity component of convertible notes, net of taxes	15,045
Balance at Sep. 30, 2018	1,904,580	$ 136	1,422,685	636,080	(100,000)	(54,321)
Balance, shares at Sep. 30, 2018		130,074,103
Balance at Dec. 31, 2017	$ 1,928,255	$ 136	1,405,014	544,886	0	(21,781)
Balance, shares at Dec. 31, 2017		135,511,891
Comprehensive income:
Repurchase of treasury stock, shares	(9,002,453)
Repurchase of treasury stock	$ (150,000)
Balance at Dec. 31, 2018	1,903,211	$ 136	1,423,405	662,375	(150,000)	(32,705)
Balance, shares at Dec. 31, 2018		126,639,912
Balance at Jun. 30, 2018	1,905,676	$ 136	1,421,679	607,944	(78,961)	(45,122)
Balance, shares at Jun. 30, 2018		131,167,705
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations	257		257
Issuance of shares pursuant to various stock plans, shares		110,354
Stock-based compensation	749		749
Cash dividends declared on common stock ($0.40 per share)	(18,242)			(18,242)
Comprehensive income:
Net income	46,378			46,378
Other comprehensive income (loss)	(9,199)					(9,199)
Repurchase of treasury stock, shares		(1,203,956)
Repurchase of treasury stock	(21,039)				(21,039)
Balance at Sep. 30, 2018	1,904,580	$ 136	1,422,685	636,080	(100,000)	(54,321)
Balance, shares at Sep. 30, 2018		130,074,103
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01				(469)		281
Balance at Dec. 31, 2018	1,903,211	$ 136	1,423,405	662,375	(150,000)	(32,705)
Balance, shares at Dec. 31, 2018		126,639,912
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations	3		3
Issuance of shares pursuant to various stock plans, shares		58,013
Stock-based compensation	3,258		3,258
Cash dividends declared on common stock ($0.40 per share)	(53,197)			(53,197)
Comprehensive income:
Net income	128,031			128,031
Other comprehensive income (loss)	$ 49,978					49,978
Repurchase of treasury stock, shares	0
Balance at Sep. 30, 2019	$ 2,031,284	$ 136	1,426,666	737,209	(150,000)	17,273
Balance, shares at Sep. 30, 2019		126,697,925
Balance at Jun. 30, 2019	1,995,172	$ 136	1,425,262	712,351	(150,000)	7,423
Balance, shares at Jun. 30, 2019		126,673,822
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to various stock plans, shares		24,103
Stock-based compensation	1,404		1,404
Cash dividends declared on common stock ($0.40 per share)	(17,734)			(17,734)
Comprehensive income:
Net income	42,592			42,592
Other comprehensive income (loss)	9,850					9,850
Balance at Sep. 30, 2019	$ 2,031,284	$ 136	$ 1,426,666	$ 737,209	$ (150,000)	$ 17,273
Balance, shares at Sep. 30, 2019		126,697,925

Consolidated Statements Of Ch_2

Consolidated Statements Of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Stockholders' Equity [Abstract]
Cash dividends declared on common stock (in dollars per share)	$ 0.14	$ 0.14	$ 0.42	$ 0.40

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Statement of Cash Flows [Abstract]
Real Estate Owned, Valuation Allowance, Valuation Increase	$ (1,125)
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	128,031	$ 145,140
Adjustments to reconcile net income to net cash from operating activities:
Discount accretion, net of depreciation and amortization	2,391	(2,915)
Stock-based compensation expense	3,897	2,924
Provision for loan losses	6,300	12,100
Credit for unfunded loan commitments	(100)	(100)
Valuation adjustment of OREO		323
Net gains on sales of SBA and other loans	(2,611)	(11,365)
Earnings on BOLI	(1,126)	(1,166)
Net change in fair value of derivatives	(57)	(15)
Net losses on sale and disposal of premises and equipment	75	38
Net losses (gains) on sales of OREO	14	(358)
Net gains on sales and calls of securities available for sale	(282)	0
Net change in fair value of equity investments with readily determinable fair value	(1,393)	(1,901)
Losses on investments in affordable housing partnership	7,523	8,347
Net change in deferred income taxes	3,907	4,863
Proceeds from sales of loans held for sale	95,926	258,231
Originations of loans held for sale	(77,678)	(229,871)
Originations of servicing assets	(1,383)	(5,489)
Net change in accrued interest receivable	2,482	(3,359)
Net change in other assets	(27,110)	(20,594)
Net change in accrued interest payable	6,823	15,756
Net change in other liabilities	4,352	9,805
Net cash provided by operating activities	148,856	180,394
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of interest bearing deposits in other financial institutions	(18,130)	(9,887)
Redemption of interest bearing deposits in other financial institutions	17,152	13,795
Purchase of securities available for sale	(174,486)	(375,710)
Proceeds from matured, called, or paid-down securities available for sale	198,743	166,746
Proceeds from sale of securities available for sale	115,628	0
Proceeds from sale of equity investments	2,570	0
Proceeds from sales of other loans held for sale previously classified as held for investment	83,599	6,814
Net change in loans receivable	(106,064)	(812,748)
Proceeds from sales of OREO	3,197	5,552
Purchase of FHLB stock	(155)
Purchase of FHLB stock		0
Redemption of FHLB stock	6,210	3,849
Purchase of premises and equipment	(5,190)	(5,516)
Proceeds from BOLI death benefits	1,363	0
Investments in affordable housing partnerships	(13,804)	(10,835)
Net cash provided by (used in) investing activities	110,633	(1,017,940)
CASH FLOWS FROM FINANCING ACTIVITIES
Net change in deposits	79,094	1,199,011
Proceeds from FHLB advances	565,000	0
Repayment of FHLB advances	(760,000)	(320,000)
Repayment of federal funds purchased	0	(69,900)
Proceeds from convertible notes, net of issuance fees	0	212,920
Purchase of treasury stock	0	(100,000)
Cash dividends paid on common stock	(53,197)	(53,477)
Taxes paid in net settlement of restricted stock	(639)	(764)
Issuance of additional stock pursuant to various stock plans	3	466
Net cash (used in) provided by financing activities	(169,739)	868,256
NET CHANGE IN CASH AND CASH EQUIVALENTS	89,750	30,710
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	459,606	492,000
CASH AND CASH EQUIVALENTS, END OF PERIOD	549,356	522,710
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Interest paid	155,889	94,778
Income taxes paid	44,492	44,153
SUPPLEMENTAL DISCLOSURES OF NON-CASH ACTIVITIES
Transfer from loans receivable to OREO	14,651	3,340
Transfer from loans receivable to loans held for sale	108,979	6,680
Transfer from loans held for sale to loans receivable	5,181	1,566
Transfer of available for sale securities to equity investments with adoption of ASU 2016-01	0	21,957
New commitments to fund affordable housing partnership investments	0	30,097
Lease liabilities arising from obtaining right-of-use assets	$ 62,833	$ 0

Hope Bancorp, Inc.

Hope Bancorp, Inc.	9 Months Ended
	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Hope Bancorp, Inc.	Hope Bancorp, Inc. Hope Bancorp, Inc. (“Hope Bancorp” on a parent-only basis and the “Company” on a consolidated basis), headquartered in Los Angeles, California, is the holding company for Bank of Hope (the “Bank”). As of September 30, 2019

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2019
Basis Of Presentation [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements included herein have been prepared without an audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”), except for the Consolidated Statement of Financial Condition as of December 31, 2018 which was from the audited financial statements included in the Company’s 2018 Annual Report on Form 10-K. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to such SEC rules and regulations. The consolidated financial statements include the accounts of Hope Bancorp and its wholly owned subsidiaries, principally Bank of Hope. All intercompany transactions and balances have been eliminated in consolidation. The Company has made all adjustments, that in the opinion of management, are necessary to fairly present the Company’s financial position at September 30, 2019 and December 31, 2018 and the results of operations for the three and nine months ended September 30, 2019 and 2018 . Certain reclassifications have been made to prior period amounts to conform to the current year presentation. The results of operations for the interim periods are not necessarily indicative of results to be anticipated for the full year. The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ significantly from those estimates. These unaudited consolidated financial statements should be read along with the audited consolidated financial statements and accompanying notes included in the Company’s 2018 Annual Report on Form 10-K. Pending Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”, also referred to as “CECL”. The FASB subsequently issued ASU 2018-19, ASU 2019-04, and ASU 2019-05 to provide additional clarification, implementation, codification improvements, and transition guidance related to ASU 2016-13. ASU 2016-13 requires the measurement of all expected credit losses for financial assets carried at amortized cost held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. ASU 2016-13 becomes effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2019. The Company has established a CECL committee to oversee the development and implementation of ASU 2016-13. The Company is collaborating with a third party advisory team and has also engaged a software vendor to assist the Company to consolidate its models to arrive at a lifetime expected credit losses in compliance with ASU 2016-13 by the effective date. The Company has completed the model development documentation, model validation, and parallel run process under the new methodology. The Company will continue to address any gaps from data quality, operational processes, policies, new disclosures, and controls arising from internal reviews, model validation, and subsequent parallel run to be performed during the fourth quarter of 2019. The Company is on track to adopt ASU 2016-13 on January 1, 2020 without electing the fair value option on eligible financial instruments. Upon adoption of the standard, the Company expects that based on current expectations of future economic conditions, its allowance for loan losses may increase by approximately 30% to 40% from the allowance for loan losses under the current incurred loss model with a large portion of that increase driven by longer duration CRE and consumer loans due to the capture of lifetime expected credit losses under CECL. The Company estimates that upon the adoption of CECL, the fully phased-in impact to the Company’s Tier 1 Common Equity Risk-Based Ratio to be a decline of approximately 22 to 29 basis points. The estimates of the impact of adopting CECL are still subject to change as management continues to review the key drivers and methodology assumptions. The ultimate effect of CECL on the Company’s allowance for loan losses will depend on the size and composition of the loan portfolio, the portfolio’s credit quality, economic conditions at the time of adoption, as well as any refinements to the Company’s models, methodology, and other key assumptions. At adoption, the Company will have a cumulative-effect adjustment to retained earnings resulting from the anticipated increase in the allowance for loan losses under CECL compared to its allowance for loan losses as determined under the current incurred loss model In January 2017, the FASB issued ASU 2017-04, “Intangibles: Goodwill and Other: Simplifying the Test for Goodwill Impairment.” ASU 2017-04 will amend and simplify current goodwill impairment testing to eliminate Step 2 from the current provisions. Under the new guidance, an entity should perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying value and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. An entity still has the option to perform the quantitative assessment for a reporting unit to determine if a quantitative impairment test is necessary. ASU 2017-04 should be adopted for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. The adoption of ASU 2017-04 is not expected to have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement”. ASU 2018-13 modifies the disclosure requirements for fair value measurements by removing, modifying, or adding certain disclosures. ASU 2018-13 removes the disclosure requirement detailing the amount of and reasons for transfers between Level 1 and Level 2, and the valuation processes for Level 3 fair value measurements. In addition, ASU 2018-13 modifies the disclosure requirements for investments in certain entities that calculate net asset value. Lastly, ASU 2018-13 adds a disclosure requirement for changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and the range and weighted average of significant unobservable inputs used to develop Level 3 measurements. ASU 2018-13 is effective annual periods in fiscal years beginning after December 15, 2019, including interim periods within those annual periods. Early adoption is permitted upon the issuance of ASU 2018-13. The removed and modified disclosures will be adopted on a retrospective basis, and the new disclosures will be adopted on a prospective basis. The adoption of ASU 2018-13 is not expected to have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, “ Intangibles - Goodwill and Other - Internal Use Software (Subtopic 250-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force)”. ASU 2018-15 requires an entity in a cloud computing arrangement (i.e., hosting arrangement) that is a service contract to follow the internal-use software guidance in ASC 350-40 to determine which implementation costs to capitalize as assets or expense as incurred. Capitalized implementation costs should be presented in the same line item on the balance sheet as amounts prepaid for the hosted service, if any (generally as an “other asset”). The capitalized costs will be amortized over the term of the hosting arrangement, with the amortization expense being presented in the same income statement line item as the fees paid for the hosted service. ASU 2018-15 is effective for annual reporting periods beginning after December 15, 2019, including interim periods within those annual periods. Early adoption is permitted, including adoption in any interim period. The adoption of ASU 2018-15 is not expected to have a material impact on the Company’s consolidated financial statements. In May 2019, the FASB issued ASU 2019-05, “Financial Instruments - Credit Losses, Topic 326.” ASU 2019-05 addresses certain stakeholders’ concerns by providing an option to irrevocably elect the fair value option for certain financial assets previously measured at amortized cost basis. For those entities, the targeted transition relief will increase comparability of financial statement information by providing an option to align measurement methodologies for similar financial assets. ASU 2016-13 allows companies to irrevocably elect, upon adoption of ASU 2016-13, the fair value option on financial instruments that (1) were previously recorded at amortized cost and (2) are within the scope of ASC 326-20 if the instruments are eligible for the fair value option under ASC 825-10. Entities are required to make this election on an instrument-by-instrument basis. The effective date for ASU 2019-05 is the same as for ASU 2016-13, or for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company does not expect to elect the fair value option on its financial instruments in accordance with ASU 2019-05.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Company previously awarded equity as a form of compensation under the 2016 stock-based incentive plan (the “2016 Plan”). The 2016 Plan was approved by the Company’s stockholders on September 1, 2016 and provided for grants of stock options, stock appreciation rights (“SARs”), restricted stock, performance shares, and performance units (sometimes referred to individually or collectively as “awards”) to non-employee directors, employees, and potentially consultants of the Company. The 2016 Plan initially had 2,400,000 shares that were available for grant to participants. On May 23, 2019, the Company’s stockholders approved the 2019 stock-based incentive plan (the “2019 Plan”) which provides for grants of stock options, SARs, restricted stock, performance shares, and performance units to non-employee directors, employees, and potentially consultants of the Company. Stock options may be either incentive stock options (“ISOs”), as defined in Section 422 of the Internal Revenue Code of 1986, as amended (the “Code”), or nonqualified stock options (“NQSOs”). The 2019 Plan replaces the 2016 Plan and stipulates that no further awards shall be made under prior plans. Therefore, future awards will only be issued from the 2019 Plan. The 2019 Plan provides the Company flexibility to (i) attract and retain qualified non-employee directors, executives, other key employees, and consultants with appropriate equity-based awards to; (ii) motivate high levels of performance; (iii) recognize employee contributions to the Company’s success; and (iv) align the interests of the participants with those of the Company’s stockholders. The 2019 Plan initially had 4,400,000 shares that were available for grant to participants. The exercise price for shares under an ISO may not be less than 100% of fair market value on the date the award is granted under the Code. Similarly, under the terms of the plans, the exercise price for SARs and NQSOs may not be less than 100% of fair market value on the date of grant. Performance units are awarded to participants at the market price of the Company’s common stock on the date of award (after the lapse of the restriction period and the attainment of the performance criteria). All options not exercised generally expire 10 years after the date of grant. ISOs, SARs, and NQSOs have vesting periods of three to five years and have 10 -year contractual terms. Restricted stock, performance shares, and performance units are granted with a restriction period of not less than one year from the grant date for performance-based awards and not more than three years from the grant date for time-based vesting of grants. Compensation expense for awards is recognized over the vesting period. Under the 2019 Plan, 4,026,465 shares were available for future grants as of September 30, 2019 . With the exception of the shares underlying stock options and restricted stock awards, the Board of Directors may choose to settle the awards by paying the equivalent cash value or by delivering the appropriate number of shares. The following is a summary of stock option activity under the 2016 Plan and 2019 Plan for the nine months ended September 30, 2019 : Number of Shares Weighted- Average Exercise Price Per Share Weighted- Average Remaining Contractual Life (Years) Aggregate Intrinsic Value (Dollars in thousands) Outstanding - January 1, 2019 982,631 $ 15.41 Granted — — Exercised (702 ) 13.10 Expired (20,718 ) 16.37 Forfeited (18,000 ) 17.18 Outstanding - September 30, 2019 943,211 $ 15.36 5.75 $ 1,002 Options exercisable - September 30, 2019 847,211 $ 15.15 5.62 $ 1,002 The following is a summary of restricted stock and performance unit activity under the 2016 Plan and 2019 Plan for the nine months ended September 30, 2019 : Number of Shares Weighted- Average Grant Date Fair Value Outstanding (unvested) - January 1, 2019 478,891 $ 16.37 Granted 767,653 13.18 Vested (116,947 ) 16.96 Forfeited (75,031 ) 14.71 Outstanding (unvested) - September 30, 2019 1,054,566 $ 14.10 The total fair value of restricted stock and performance units vested for the nine months ended September 30, 2019 and 2018 was $1.6 million and $2.7 million , respectively. In 2017, the Company adopted the Hope Employee Stock Purchase Plan (“ESPP”) which allows eligible employees to purchase the Company’s common shares through payroll deductions which build up between the offering date and the purchase date. At the purchase date, the Company uses the accumulated funds to purchase shares of the Company’s common stock on behalf of the participating employees at a 10% discount to the closing price of the Company’s common shares. The closing price is the lower of either the closing price on the first day of the offering period or on the closing price on the purchase date. The dollar amount of common shares purchased under the ESPP must not exceed 20% of the participating employee’s base salary, subject to a cap of $25 thousand in stock value based on the grant date. The ESPP is considered compensatory under GAAP and compensation expense for the ESPP is recognized as part of the Company’s stock-based compensation expenses. The compensation expense for ESPP during the three months ended September 30, 2019 and 2018 was $57 thousand and $88 thousand , respectively. The compensation expense for ESPP during the nine months ended September 30, 2019 and 2018 was $182 thousand and $277 thousand , respectively. The total amount charged against income related to stock-based payment arrangements, including ESPP, was $1.6 million and $1.1 million for the three months ended September 30, 2019 and 2018 , respectively. For the nine months ended September 30, 2019 and 2018 , $3.9 million and $2.9 million , respectively, of stock-based payment arrangements were charged against income. The income tax benefit recognized was approximately $400 thousand and $264 thousand for the three months ended September 30, 2019 and 2018 , respectively. The income tax benefit recognized for the nine months ended September 30, 2019 and 2018 , was approximately $984 thousand and $747 thousand , respectively. At September 30, 2019 , the unrecognized compensation expense related to non-vested stock option grants was $298 thousand and is expected to be recognized over a weighted average vesting period of 1.92 years. Unrecognized compensation expense related to non-vested restricted stock and performance units was $9.4 million , and is expected to be recognized over a weighted average vesting period of 2.03 years.

Earnings Per Share ("EPS")

Earnings Per Share ("EPS")	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Share ("EPS")	Earnings Per Share (“EPS”) Basic EPS does not reflect the possibility of dilution that could result from the issuance of additional shares of common stock upon exercise or conversion of outstanding equity awards or convertible notes and is computed by dividing net income by the weighted average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if stock options, convertible notes, or other contracts to issue common stock were exercised or converted to common stock that would then share in earnings. For the three months ended September 30, 2019 and 2018 , stock options and restricted shares awards of 963,400 and 306,410 shares of common stock, respectively, were excluded in computing diluted earnings per common share because they were anti-dilutive. For the nine months ended September 30, 2019 and 2018 , stock options and restricted shares awards of 986,245 and 296,357 shares of common stock, respectively, were excluded in computing diluted earnings per common share because they were anti-dilutive. Additionally, warrants issued pursuant to the Company’s participation in the U.S. Treasury’s TARP Capital Purchase Plan to purchase and 20,845 shares of common stock were anti-dilutive and excluded for the three and nine months ended September 30, 2018 . All outstanding warrants expired in December 2018. Therefore there were no warrants outstanding during the three and nine months ended September 30, 2019 . During the second quarter of 2018, the Company issued $217.5 million in convertible senior notes maturing on May 15, 2038. The convertible notes can be converted into the Company’s shares of common stock at an initial rate of 45.0760 shares per $1,000 principal amount of the notes (See footnote 11 “Subordinated Debentures and Convertible Notes” for additional information regarding convertible notes issued). For the three and nine months ended September 30, 2019 and 2018 , shares related to the convertible notes issued were not included in the Company’s diluted EPS calculation. In accordance with the terms of the convertible notes and settlement options available to the Company, no shares would have been delivered to investors of the convertible notes upon assumed conversion based on the Company’s common stock price during the three and nine months ended September 30, 2019 and 2018 . On April 26, 2018, the Company’s Board of Directors approved a share repurchase program that authorized the Company to repurchase up to $100.0 million in common stock and then approved another share repurchase program on September 20, 2018 that authorized the Company to repurchase up to $50.0 million in common stock. During the year ended December 31, 2018, the Company repurchased 9,002,453 shares of common stock totaling $150.0 million . The repurchased shares were recorded as treasury stock and reduced the total number of common shares outstanding. The Company’s Board of Directors approved another share repurchase program in June 2019 that authorizes the Company to repurchase up to $50 million of its common stock. As of September 30, 2019, no shares have been repurchased from this program. The following tables show the computation of basic and diluted EPS for the three and nine months ended September 30, 2019 and 2018 . Three Months Ended September 30, 2019 2018 Net Income (Numerator) Weighted-Average Shares (Denominator) Earnings Per Share Net Income (Numerator) Weighted-Average Shares Earnings (Dollars in thousands, except share and per share data) Basic EPS - common stock $ 42,592 126,685,921 $ 0.34 $ 46,378 130,268,992 $ 0.36 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 321,548 256,482 Diluted EPS - common stock $ 42,592 127,007,469 $ 0.34 $ 46,378 130,525,474 $ 0.36 Nine Months Ended September 30, 2019 2018 Net Income (Numerator) Weighted-Average Shares Earnings Net Income (Numerator) Weighted-Average Shares Earnings (Dollars in thousands, except share and per share data) Basic EPS - common stock $ 128,031 126,661,798 $ 1.01 $ 145,140 132,930,437 $ 1.09 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 234,172 283,632 Diluted EPS - common stock $ 128,031 126,895,970 $ 1.01 $ 145,140 133,214,069 $ 1.09

Equity Investment Securities

Equity Investment Securities	9 Months Ended
	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Equity Investment Securities	Equity Investments On January 1, 2018, the Company adopted ASU 2016-01, “ Recognition and Measurement of Financial Assets and Financial Liabilities”. Upon adoption, the Company reclassified $469 thousand in net unrealized losses included in other comprehensive income and deferred tax assets to retained earnings on January 1, 2018. Equity investments with readily determinable fair values at September 30, 2019 , consisted of mutual funds in the amount of $22.2 million and is included in “Equity investments” on the Consolidated Statements of Financial Condition. During the second quarter of 2019, the Company sold its equity stock in other institutions for $2.6 million . There was no change in fair value recorded on the equity investments sold. Equity investments with readily determinable fair values at December 31, 2018, consisted of mutual funds and equity stock in other institutions in the amount of $21.5 million and $1.9 million , respectively. The change in fair value for equity investments with readily determinable fair values for the three and nine ended September 30, 2019 and 2018 were recorded in other noninterest income and fees as summarized in the table below: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (Dollars in thousands) Net change in fair value recorded during the period on equity investments with readily determinable fair value $ 168 $ (1,617 ) $ 1,393 $ 1,901 Net change in fair value recorded on equity investments sold during the period — — — — Net change in fair value on equity investments with readily determinable fair values $ 168 $ (1,617 ) $ 1,393 $ 1,901 At September 30, 2019 and December 31, 2018, the Company also had equity investments without readily determinable fair value which are carried at cost less any determined impairment. The balance of these investments is adjusted for changes in subsequent observable prices. At September 30, 2019 , the total balance of equity investments without readily determinable fair values included in “Equity investments” on the Consolidated Statements of Financial Condition was $26.8 million , consisting of $370 thousand in correspondent bank stock, $1.0 million in Community Development Financial Institutions (“CDFI”) investments, and $25.5 million in Community Reinvestment Act (“CRA”) investments. At December 31, 2018, the total balance of equity investments without readily determinable fair values was $26.4 million , consisting of $370 thousand in correspondent bank stock, $1.0 million in CDFI investments, and $25.1 million in CRA investments. The Company had no impairments or subsequent observable price changes for equity investments without readily determinable fair values for the three and nine ended September 30, 2019 and 2018

Securities Available for Sale

Securities Available for Sale	9 Months Ended
	Sep. 30, 2019
Debt Securities, Available-for-sale [Abstract]
Securities Available for Sale	Securities Available for Sale The following is a summary of securities available for sale as of the dates indicated: At September 30, 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (Dollars in thousands) Debt securities: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 795,369 $ 7,714 $ (2,012 ) $ 801,071 Mortgage-backed securities: Residential 331,875 1,529 (1,281 ) 332,123 Commercial 545,282 18,769 (943 ) 563,108 Corporate securities 5,000 — (1,102 ) 3,898 Municipal securities 71,151 1,340 (369 ) 72,122 Total investment securities available for sale $ 1,748,677 $ 29,352 $ (5,707 ) $ 1,772,322 At December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (Dollars in thousands) Debt securities: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 914,710 $ 1,541 $ (21,129 ) $ 895,122 Mortgage-backed securities: Residential 415,659 47 (13,101 ) 402,605 Commercial 481,081 1,024 (12,979 ) 469,126 Corporate securities 5,000 — (1,174 ) 3,826 Municipal securities 77,168 398 (1,980 ) 75,586 Total investment securities available for sale $ 1,893,618 $ 3,010 $ (50,363 ) $ 1,846,265 As of September 30, 2019 and December 31, 2018 , there were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of stockholders’ equity. During the three and nine months ended September 30, 2019 , the Company recognized net gains on sales and calls of securities available for sale in the amount of $153 thousand and $282 thousand , respectively. For the three months ended September 30, 2019, the net gains on sales and calls of securities available for sale consisted of $224 thousand in gross gains from sales and calls of securities offset by $71 thousand in gross losses on investment securities sold. For the nine months ended September 30, 2019, the net gains on sales and calls of securities available for sale consisted of $751 thousand in gross gains from the sale and call of securities offset by $469 thousand in gross losses on investment securities sold. Tax provision recorded on the net gains on sales and calls of securities available for sale was approximately $39 thousand and $71 thousand for the three and nine months ended September 30, 2019 , respectively. For the three months ended September 30, 2019, the Company received proceeds from the sale of $46.5 million in investment securities, which consisted of $2.3 million municipal securities and $44.2 million mortgage-backed securities sold. For the nine months ended September 30, 2019, the Company received proceeds from the sale of $115.6 million in investment securities, which consisted of $41.8 million municipal securities and $73.9 million mortgage-backed securities sold. For the three or nine months ended September 30, 2018, there were no sales of securities available for sale. At September 30, 2019 and December 31, 2018 , $17.3 million in unrealized gains and $32.7 million in unrealized losses on securities available for sale net of taxes, respectively, were included in accumulated other comprehensive income (loss). For the three and nine months ended September 30, 2019 , reclassifications out of accumulated other comprehensive income into earnings was $153 thousand and $282 thousand , respectively. There were no reclassifications out of accumulated other comprehensive loss into earnings during the three and nine months ended September 30, 2018 . The amortized cost and estimated fair value of investment securities at September 30, 2019 , by contractual maturity, is presented in the table below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations, with or without call or prepayment penalties. Collateralized mortgage obligations and mortgage-backed securities are not due at a single maturity date and their total balances are shown separately. Amortized Cost Estimated Fair Value (Dollars in thousands) Available for sale: Due within one year $ 80 $ 80 Due after one year through five years 349 351 Due after five years through ten years — — Due after ten years 75,722 75,589 U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations 795,369 801,071 Mortgage-backed securities: Residential 331,875 332,123 Commercial 545,282 563,108 Total $ 1,748,677 $ 1,772,322 Securities with carrying values of approximately $345.0 million and $354.6 million at September 30, 2019 and December 31, 2018 , respectively, were pledged to secure public deposits, for various borrowings, and for other purposes as required or permitted by law. The following tables show the Company’s investments’ gross unrealized losses and estimated fair values, aggregated by investment category and the length of time that the individual securities have been in a continuous unrealized loss position as of the dates indicated. As of September 30, 2019 Less than 12 months 12 months or longer Total Description of Securities Number Fair Value Gross Unrealized Losses Number Fair Value Gross Unrealized Losses Number of Fair Value Gross Unrealized Losses (Dollars in thousands) Collateralized mortgage obligations* 14 $ 82,505 $ (324 ) 32 $ 194,974 $ (1,688 ) 46 $ 277,479 $ (2,012 ) Mortgage-backed securities: Residential* 1 24,570 (18 ) 19 157,746 (1,263 ) 20 182,316 (1,281 ) Commercial* 4 39,882 (256 ) 5 77,481 (687 ) 9 117,363 (943 ) Corporate securities — — — 1 3,898 (1,102 ) 1 3,898 (1,102 ) Municipal securities 1 3,613 (25 ) 3 16,648 (344 ) 4 20,261 (369 ) Total 20 $ 150,570 $ (623 ) 60 $ 450,747 $ (5,084 ) 80 $ 601,317 $ (5,707 ) __________________________________ * Investments in U.S. Government agency and U.S. Government sponsored enterprises As of December 31, 2018 Less than 12 months 12 months or longer Total Description of Securities Number of Securities Fair Value Gross Unrealized Losses Number Fair Value Gross Unrealized Losses Number Fair Value Gross Unrealized Losses (Dollars in thousands) Collateralized mortgage obligations* 1 $ 8,041 $ (28 ) 93 $ 700,095 $ (21,101 ) 94 $ 708,136 $ (21,129 ) Mortgage-backed securities: Residential* 4 19,973 (37 ) 45 363,334 (13,064 ) 49 383,307 (13,101 ) Commercial* 3 38,494 (218 ) 27 312,428 (12,761 ) 30 350,922 (12,979 ) Corporate securities — — — 1 3,826 (1,174 ) 1 3,826 (1,174 ) Municipal securities 13 5,528 (83 ) 32 42,444 (1,897 ) 45 47,972 (1,980 ) Total 21 $ 72,036 $ (366 ) 198 $ 1,422,127 $ (49,997 ) 219 $ 1,494,163 $ (50,363 ) __________________________________ * Investments in U.S. Government agency and U.S. Government sponsored enterprises The Company evaluates securities for other-than-temporary-impairment (“OTTI”) on at least a quarterly basis, and more frequently when economic or market concerns warrant such evaluation. Consideration is given to the financial condition and near-term prospects of the issuer, the length of time and the extent to which the fair values of the securities have been less than the cost of the securities, management’s intention to sell, and/or whether it is more likely than not that management will be required to sell the security in an unrealized loss position before recovery of its amortized cost basis. In analyzing an issuer’s financial condition, the Company considers, among other considerations, whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred, and the results of reviews of the issuer’s financial condition. All of the Company’s investment types had investments that were in a continuous unrealized loss position for twelve months or longer as of September 30, 2019 . The collateralized mortgage obligations in a continuous loss position for twelve months or longer had unrealized losses of $1.7 million at September 30, 2019 , and total residential and commercial mortgage backed securities in a continuous loss position for twelve months or longer had total unrealized losses of $2.0 million . These securities were issued by U.S. Government agency and U.S. Government sponsored enterprises and have high credit ratings of “AA” grade or better. Interest on U.S. Government agencies and U.S. Government sponsored enterprise investments have been paid as agreed, and management believes this will continue in the future and that the securities will be repaid in full as scheduled. Corporate securities that were in a continuous loss position for twelve months or longer had unrealized losses of $1.1 million at September 30, 2019 . Municipal securities that were in a continuous loss position for twelve months or longer had unrealized losses of $344 thousand at September 30, 2019 . The market value declines for these securities were primarily due to movements in interest rates and are not reflective of management’s expectations of the Company’s ability to fully recover these investments, which may be at maturity. For these reasons, no OTTI was recognized on U.S. Government sponsored collateralized mortgage obligations and mortgage backed securities, corporate securities, and municipal securities that were in an unrealized loss position at September 30, 2019 . The Company considers the losses on the investments in unrealized loss positions at September 30, 2019 to be temporary based on: 1) the likelihood of recovery; 2) the information relative to the extent and duration of the decline in market value; and 3) the Company’s intention not to sell, and management’s determination that it is more likely than not that the Company will not be required to sell a security in an unrealized loss position before recovery of its amortized cost basis.

Loans Receivable and Allowance

Loans Receivable and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Loans Receivable and Allowance for Loan Losses	Loans Receivable and Allowance for Loan Losses The following is a summary of loans receivable by major category: September 30, 2019 December 31, 2018 Loan portfolio composition (Dollars in thousands) Real estate loans: Residential $ 46,919 $ 51,197 Commercial 8,235,839 8,395,327 Construction 305,185 275,076 Total real estate loans 8,587,943 8,721,600 Commercial business 2,482,817 2,127,630 Trade finance 161,019 197,190 Consumer and other 870,734 1,051,486 Total loans outstanding 12,102,513 12,097,906 Deferred loan costs, net 2,169 209 Loans receivable 12,104,682 12,098,115 Allowance for loan losses (93,882 ) (92,557 ) Loans receivable, net of allowance for loan losses $ 12,010,800 $ 12,005,558 The loan portfolio is made up of four segments: real estate loans, commercial business, trade finance, and consumer and other. Real estate loans are extended for the purchase and refinance of commercial real estate and are generally secured by first deeds of trust and are collateralized by residential or commercial properties. Commercial business loans are loans provided to businesses for various purposes such as for working capital, purchasing inventory, debt refinancing, business acquisitions and other business related financing needs. Trade finance loans generally serves businesses involved in international trade activities. Consumer and other loans consist mostly of single family residential mortgage loans but also includes home equity, credit cards, and other personal loans. The four segments are further segregated between loans accounted for under the amortized cost method (“Legacy Loans”), and previously acquired loans that were originally recorded at fair value with no carryover of the related pre-acquisition allowance for loan losses (“Acquired Loans”). Acquired Loans are further segregated between purchased credit impaired loans (loans with credit deterioration on the date of acquisition and accounted for under ASC 310-30, or “PCI loans”), and Acquired Performing Loans (loans that were pass graded on the acquisition date and the fair value adjustment is amortized over the contractual life under ASC 310-20, or “non-PCI loans”). The following table presents changes in the accretable discount on PCI loans for the three and nine months ended September 30, 2019 and 2018 : Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (Dollars in thousands) Balance at beginning of period $ 43,362 $ 53,573 $ 49,697 $ 55,002 Accretion (5,234 ) (5,239 ) (17,916 ) (16,970 ) Reclassification from nonaccretable difference 1,893 7,889 8,240 18,191 Balance at end of period $ 40,021 $ 56,223 $ 40,021 $ 56,223 On the acquisition date, the amount by which the undiscounted expected cash flows exceed the estimated fair value of PCI loans is considered the “accretable yield.” The accretable yield is measured at each financial reporting date and represents the difference between the remaining undiscounted expected cash flows and the current carrying value of the loans. The accretable yield will change from period to period due to the following: 1) estimates of the remaining life of acquired loans will affect the amount of future interest income; 2) indices for variable rates of interest on PCI loans may change; and 3) estimates of the amount of the contractual principal and interest that will not be collected (nonaccretable difference) may change. The following tables detail the activity in the allowance for loan losses by portfolio segment for the three and nine months ended September 30, 2019 and 2018 : Legacy Loans Acquired Loans Total Real Estate Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Three Months Ended September 30, 2019 Balance, beginning of period $ 47,154 $ 26,757 $ 1,009 $ 6,676 $ 6,930 $ 4,598 $ — $ 942 $ 94,066 Provision (credit) for loan losses 4 2,851 (485 ) (7 ) (91 ) (80 ) — (92 ) 2,100 Loans charged off (848 ) (1,105 ) — (281 ) (349 ) (19 ) — — (2,602 ) Recoveries of charge offs 158 377 — 6 88 151 — — 780 PCI allowance adjustment — — — — — — — (462 ) (462 ) Balance, end of period $ 46,468 $ 28,880 $ 524 $ 6,394 $ 6,578 $ 4,650 $ — $ 388 $ 93,882 Nine Months Ended September 30, 2019 Balance, beginning of period $ 49,446 $ 21,826 $ 719 $ 6,269 $ 7,321 $ 5,939 $ — $ 1,037 $ 92,557 Provision (credit) for loan losses (3,459 ) 9,655 (195 ) 945 (766 ) 233 — (113 ) 6,300 Loans charged off (1,064 ) (3,187 ) — (834 ) (375 ) (896 ) — (76 ) (6,432 ) Recoveries of charge offs 1,545 586 — 14 398 252 — 2 2,797 PCI allowance adjustment — — — — — (878 ) — (462 ) (1,340 ) Balance, end of period $ 46,468 $ 28,880 $ 524 $ 6,394 $ 6,578 $ 4,650 $ — $ 388 $ 93,882 Legacy Loans Acquired Loans Total Real Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Three Months Ended September 30, 2018 Balance, beginning of period $ 48,235 $ 22,031 $ 983 $ 4,799 $ 12,816 $ 991 $ 3 $ 23 $ 89,881 Provision (credit) for loan losses 5,537 (856 ) (159 ) 1,036 1,744 28 (3 ) (27 ) 7,300 Loans charged off (5,854 ) (292 ) — (343 ) (191 ) (174 ) — (13 ) (6,867 ) Recoveries of charge offs 41 188 17 1 — 32 — 36 315 Balance, end of period $ 47,959 $ 21,071 $ 841 $ 5,493 $ 14,369 $ 877 $ — $ 19 $ 90,629 Nine Months Ended September 30, 2018 Balance, beginning of period $ 45,360 $ 17,228 $ 1,674 $ 3,385 $ 13,322 $ 3,527 $ 42 $ 3 $ 84,541 Provision (credit) for loan losses 7,792 2,920 (874 ) 2,999 1,430 (2,114 ) (42 ) (11 ) 12,100 Loans charged off (6,061 ) (1,080 ) — (919 ) (385 ) (740 ) — (13 ) (9,198 ) Recoveries of charge offs 868 2,003 41 28 2 204 — 40 3,186 Balance, end of period $ 47,959 $ 21,071 $ 841 $ 5,493 $ 14,369 $ 877 $ — $ 19 $ 90,629 The following tables break out the allowance for loan losses and the recorded investment of loans outstanding (not including accrued interest receivable and net deferred loan costs or fees) by individually impaired, general valuation, and PCI impairment, by portfolio segment at September 30, 2019 and December 31, 2018 : September 30, 2019 Legacy Loans Acquired Loans Total Real Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Allowance for loan losses: Individually evaluated for impairment $ 117 $ 2,435 $ — $ 12 $ 142 $ 941 $ — $ 1 $ 3,648 Collectively evaluated for impairment 46,351 26,445 524 6,382 1,752 387 — 17 81,858 PCI loans — — — — 4,684 3,322 — 370 8,376 Total $ 46,468 $ 28,880 $ 524 $ 6,394 $ 6,578 $ 4,650 $ — $ 388 $ 93,882 Loans outstanding: Individually evaluated for impairment $ 34,366 $ 20,592 $ — $ 2,379 $ 15,216 $ 3,914 $ — $ 797 $ 77,264 Collectively evaluated for impairment 7,272,943 2,397,490 161,019 756,102 1,164,527 53,183 — 108,130 11,913,394 PCI loans — — — — 100,891 7,638 — 3,326 111,855 Total $ 7,307,309 $ 2,418,082 $ 161,019 $ 758,481 $ 1,280,634 $ 64,735 $ — $ 112,253 $ 12,102,513 December 31, 2018 Legacy Loans Acquired Loans Total Real Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Allowance for loan losses: Individually evaluated for impairment $ 176 $ 4,221 $ — $ 3 $ 261 $ 130 $ — $ — $ 4,791 Collectively evaluated for impairment 49,270 17,605 719 6,266 1,264 460 — 19 75,603 PCI loans — — — — 5,796 5,349 — 1,018 12,163 Total $ 49,446 $ 21,826 $ 719 $ 6,269 $ 7,321 $ 5,939 $ — $ 1,037 $ 92,557 Loans outstanding: Individually evaluated for impairment $ 39,976 $ 29,624 $ 5,887 $ 441 $ 18,080 $ 5,734 $ 3,124 $ 1,141 $ 104,007 Collectively evaluated for impairment 7,037,392 1,988,067 188,179 910,292 1,507,858 80,916 — 133,942 11,846,646 PCI loans — — — — 118,294 23,289 — 5,670 147,253 Total $ 7,077,368 $ 2,017,691 $ 194,066 $ 910,733 $ 1,644,232 $ 109,939 $ 3,124 $ 140,753 $ 12,097,906 At September 30, 2019 and December 31, 2018 , the balance of PCI loans that had credit deterioration subsequent to acquisition was $19.7 million and $57.9 million , respectively. PCI loans with subsequent credit deterioration had an allowance for loan losses balance of $8.4 million and $12.2 million at September 30, 2019 and December 31, 2018 , respectively. As of September 30, 2019 and December 31, 2018 , the reserve for unfunded loan commitments recorded in other liabilities was $636 thousand and $736 thousand , respectively . For the three months ended September 30, 2019 and 2018 , the Company recorded reductions to reserves for unfunded commitments recorded in credit related expenses totaling $100 thousand and $50 thousand , respectively. For the nine months ended September 30, 2019 , the Company recorded a reduction to reserves for unfunded commitments totaling $100 thousand , and recorded a reduction to reserves for unfunded loan commitment for the nine months ended September 30, 2018 totaling $100 thousand . The recorded investment of individually impaired loans and the total impaired loans net of specific allowance is presented in the following table for the dates indicated: September 30, 2019 December 31, 2018 (Dollars in thousands) With allocated specific allowance Without charge off $ 30,473 $ 35,365 With charge off 3,763 681 With no allocated specific allowance Without charge off 31,884 59,607 With charge off 11,144 8,354 Specific allowance on impaired loans (3,648 ) (4,791 ) Impaired loans, net of specific allowance $ 73,616 $ 99,216 The following tables detail the recorded investment of impaired loans (Legacy Loans and Acquired Loans that became impaired subsequent to being originated and acquired, respectfully) as of September 30, 2019 and December 31, 2018 , and the average recorded investment and interest income recognized for the three and nine months ended September 30, 2019 and 2018 . Impaired loans with no related allowance are believed by management to be adequately collateralized. As of September 30, 2019 As of December 31, 2018 Total Impaired Loans (1) Recorded Investment (2) Unpaid Contractual Principal Balance Related Allowance Recorded Investment (2) Unpaid Contractual Principal Balance Related Allowance (Dollars in thousands) With related allowance: Real estate – residential $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 2,292 2,563 75 1,375 1,487 156 Hotel & motel 1,166 6,398 8 1,949 2,310 119 Gas station & car wash 61 1,967 3 — — — Mixed use 629 720 16 881 947 43 Industrial & warehouse 8,354 10,621 144 1,305 2,139 93 Other 1,098 1,819 13 7,759 8,174 26 Real estate – construction — — — — — — Commercial business 19,572 21,558 3,376 22,203 23,928 4,351 Trade finance — — — — — — Consumer and other 1,064 1,094 13 575 575 3 Subtotal $ 34,236 $ 46,740 $ 3,648 $ 36,047 $ 39,560 $ 4,791 With no related allowance: Real estate – residential $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 5,108 5,973 — 8,005 11,234 — Hotel & motel 9,790 17,841 — 10,877 22,590 — Gas station & car wash 415 938 — 545 3,653 — Mixed use 3,253 3,268 — 7,048 7,058 — Industrial & warehouse 8,744 12,519 — 12,343 13,467 — Other 8,672 13,295 — 5,969 7,122 — Real estate – construction — — — — — — Commercial business 4,934 10,310 — 13,155 17,850 — Trade finance — — — 9,011 9,011 — Consumer and other 2,112 2,198 — 1,007 1,156 — Subtotal $ 43,028 $ 66,342 $ — $ 67,960 $ 93,141 $ — Total $ 77,264 $ 113,082 $ 3,648 $ 104,007 $ 132,701 $ 4,791 __________________________________ (1) Impaired loans exclude acquired PCI loans (2) Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. For the Three Months Ended September 30, For the Nine Months Ended September 30, 2019 2018 2019 2018 Total Impaired Loans (1) Average Recorded Investment (2) Interest Income Recognized During Impairment Average Recorded Investment (2) Interest Income Recognized During Impairment Average Recorded Investment (2) Interest Income Recognized During Impairment Average Recorded Investment (2) Interest Income Recognized During Impairment (Dollars in thousands) With related allowance: Real estate – residential $ — $ — $ 125 $ — $ — $ — $ 63 $ — Real estate – commercial Retail 2,257 9 4,740 8 1,983 29 4,099 22 Hotel & motel 1,478 — 2,897 — 1,684 — 2,888 — Gas station & car wash 61 — — — 31 — — — Mixed use 733 1 3,004 40 801 4 2,320 115 Industrial & warehouse 7,631 91 1,721 6 6,039 261 1,648 22 Other 968 5 4,322 33 3,513 16 5,608 133 Real estate – construction — — — — — — — — Commercial business 20,666 173 22,159 138 22,453 545 23,381 408 Trade finance 1,413 — 2,128 2 732 — 2,678 4 Consumer and other 1,011 1 981 6 887 2 744 12 Subtotal $ 36,218 $ 280 $ 42,077 $ 233 $ 38,123 $ 857 $ 43,429 $ 716 With no related allowance: Real estate – residential $ — $ — $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 8,071 39 7,901 36 12,182 110 10,390 107 Hotel & motel 9,963 — 6,834 — 10,140 — 4,887 — Gas station & car wash 436 4 358 — 487 13 514 — Mixed use 3,363 50 3,886 49 5,247 152 2,494 149 Industrial & warehouse 10,344 52 12,209 86 10,771 155 11,364 249 Other 12,668 66 12,559 80 11,422 199 14,892 230 Real estate – construction — — — — — — 650 — Commercial business 6,780 17 20,320 129 9,810 55 19,262 360 Trade finance 1,659 — 5,785 120 5,159 — 4,503 354 Consumer and other 2,116 — 1,541 — 1,505 — 1,569 — Subtotal $ 55,400 $ 228 $ 71,393 $ 500 $ 66,723 $ 684 $ 70,525 $ 1,449 Total $ 91,618 $ 508 $ 113,470 $ 733 $ 104,846 $ 1,541 $ 113,954 $ 2,165 __________________________________ (1) Impaired loans exclude acquired PCI loans (2) Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. As of September 30, 2019 As of December 31, 2018 Impaired Acquired Loans (1) Recorded Investment (2) Unpaid Contractual Principal Balance Related Allowance Recorded Investment (2) Unpaid Contractual Principal Balance Related Allowance (Dollars in thousands) With related allowance: Real estate – residential $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 888 922 36 198 220 118 Hotel & motel 54 345 2 72 345 4 Gas station & car wash 61 1,967 3 — — — Mixed use 283 289 14 312 312 38 Industrial & warehouse 325 1,910 87 230 1,050 88 Other — — — 3,454 3,454 13 Real estate – construction — — — — — — Commercial business 3,815 4,442 941 4,064 5,041 130 Trade finance — — — — — — Consumer and other 124 — 1 144 144 — Subtotal $ 5,550 $ 9,875 $ 1,084 $ 8,474 $ 10,566 $ 391 With no related allowance: Real estate – residential $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 2,957 3,187 — 3,285 4,151 — Hotel & motel 5,261 6,687 — 5,428 6,874 — Gas station & car wash 182 705 — 247 2,673 — Mixed use — — — 3,722 3,726 — Industrial & warehouse — — — 119 894 — Other 5,205 9,306 — 1,013 1,326 — Real estate – construction — — — — — — Commercial business 99 1,041 — 1,670 2,681 — Trade finance — — — 3,124 3,124 — Consumer and other 673 139 — 997 1,144 — Subtotal $ 14,377 $ 21,065 $ — $ 19,605 $ 26,593 $ — Total $ 19,927 $ 30,940 $ 1,084 $ 28,079 $ 37,159 $ 391 __________________________________ (1) Impaired loans exclude acquired PCI loans (2) Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. For the Three Months Ended September 30, For the Nine Months Ended September 30, 2019 2018 2019 2018 Impaired Acquired Loans (1) Average Recorded Investment (2) Interest Income Recognized During Impairment Average Recorded Investment (2) Interest Income Recognized During Impairment Average Recorded Investment (2) Interest Income Recognized During Impairment Average Recorded Investment (2) Interest Income Recognized During Impairment (Dollars in thousands) With related allowance: Real estate – residential $ — $ — $ 125 $ — $ — $ — $ 63 $ — Real estate – commercial Retail 849 4 793 — 617 12 588 — Hotel & motel 63 — 73 — 68 — 79 — Gas station & car wash 61 — — — 31 — — — Mixed use 288 1 2,833 40 298 4 2,189 115 Industrial & warehouse 326 — 258 — 279 — 250 1 Other — — 788 3 999 — 1,802 10 Real estate – construction — — — — — — — — Commercial business 2,918 53 4,506 41 3,469 166 5,709 121 Trade finance — — — — — — — — Consumer and other 128 — 150 2 134 — 75 4 Subtotal $ 4,633 $ 58 $ 9,526 $ 86 $ 5,895 $ 182 $ 10,755 $ 251 With no related allowance: Real estate – residential $ — $ — $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 5,056 34 3,008 31 5,233 94 3,181 92 Hotel & motel 5,306 — 3,516 — 5,358 — 2,000 — Gas station & car wash 183 — 218 — 214 — 159 — Mixed use 97 — 36 — 1,955 — 56 — Industrial & warehouse — — 119 — 53 — 287 — Other 5,168 66 4,364 63 3,929 199 5,574 181 Real estate – construction — — — — — — — — Commercial business 1,153 — 6,894 27 1,262 — 5,405 65 Trade finance 1,659 — 3,097 48 2,377 — 3,136 138 Consumer and other 676 — 1,531 — 783 — 1,373 — Subtotal $ 19,298 $ 100 $ 22,783 $ 169 $ 21,164 $ 293 $ 21,171 $ 476 Total $ 23,931 $ 158 $ 32,309 $ 255 $ 27,059 $ 475 $ 31,926 $ 727 __________________________________ (1) Impaired loans exclude acquired PCI loans (2) Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. Generally, loans are placed on nonaccrual status if principal and/or interest payments become 90 days or more past due and/or management deems the collectability of the principal and/or interest to be in question, as well as when required by regulatory requirements. Loans to customers whose financial condition has deteriorated are considered for nonaccrual status whether or not the loan is 90 days or more past due. Generally, payments received on nonaccrual loans are recorded as principal reductions. Loans are returned to accrual status only when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. The Company did not recognize any cash basis interest income for the three and nine months ended September 30, 2019 or 2018 . The following table represents the recorded investment of nonaccrual loans and loans past due 90 or more days and still on accrual status by class of loans as of September 30, 2019 and December 31, 2018 . Nonaccrual Loans (1) Accruing Loans Past Due 90 or More Days September 30, 2019 December 31, 2018 September 30, 2019 December 31, 2018 (Dollars in thousands) Legacy Loans: Real estate – residential $ — $ — $ — $ — Real estate – commercial Retail 2,956 5,153 — — Hotel & motel 5,641 7,325 — — Gas station & car wash — 31 — — Mixed use 516 749 — — Industrial & warehouse 6,325 6,111 — — Other 4,226 5,940 — — Real estate – construction — — — — Commercial business 10,469 14,837 — — Trade finance — 1,661 — — Consumer and other 2,276 441 398 243 Subtotal $ 32,409 $ 42,248 $ 398 $ 243 Acquired Loans: (2) Real estate – residential $ — $ — $ — $ — Real estate – commercial Retail 920 829 — — Hotel & motel 5,315 5,500 — 1,286 Gas station & car wash 243 247 — — Mixed use 167 1,224 — — Industrial & warehouse 325 349 — — Other 1,286 259 — — Real estate – construction — — — — Commercial business 773 1,632 — — Trade finance — — — — Consumer and other 797 998 — — Subtotal $ 9,826 $ 11,038 $ — $ 1,286 Total $ 42,235 $ 53,286 $ 398 $ 1,529 __________________________________ (1) Total nonaccrual loans exclude guaranteed portion of delinquent SBA loans that are in liquidation totaling $37.3 million and $29.2 million , at September 30, 2019 and December 31, 2018 , respectively. (2) Acquired Loans exclude PCI loans. The following tables present the recorded investment of past due loans, including nonaccrual loans past due 30 or more days, by the number of days past due as of September 30, 2019 and December 31, 2018 by class of loans: As of September 30, 2019 As of December 31, 2018 30-59 Days Past Due 60-89 Days Past Due 90 or More Days Past Due Total Past Due 30-59 Days 60-89 Days 90 or More Days Past Due Total (Dollars in thousands) Legacy Loans: Real estate – residential $ — $ — $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 1,238 — 1,107 2,345 733 — 809 1,542 Hotel & motel 945 334 2,120 3,399 153 — 5,215 5,368 Gas station & car wash 921 1,812 — 2,733 — — 31 31 Mixed use 169 634 — 803 — — — — Industrial & warehouse — 952 3,759 4,711 1,465 — 1,922 3,387 Other 3,334 — 2,363 5,697 1,837 — 2,405 4,242 Real estate – construction — — — — — — — — Commercial business 1,599 428 3,917 5,944 5,500 435 7,003 12,938 Trade finance 50 — — 50 1,036 — 1,661 2,697 Consumer and other 6,551 370 1,960 8,881 16,413 140 247 16,800 Subtotal $ 14,807 $ 4,530 $ 15,226 $ 34,563 $ 27,137 $ 575 $ 19,293 $ 47,005 Acquired Loans: (1) Real estate – residential $ — $ — $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 96 — 620 716 347 — 602 949 Hotel & motel 411 — 3,973 4,384 — — 5,206 5,206 Gas station & car wash — — 221 221 154 — 221 375 Mixed use — — — — 107 — 1,034 1,141 Industrial & warehouse 625 75 93 793 142 — 119 261 Other — — 297 297 183 219 — 402 Real estate – construction 10,165 — — 10,165 — — — — Commercial business 266 17 140 423 397 613 253 1,263 Trade finance — — — — — — — — Consumer and other 117 280 268 665 — — 334 334 Subtotal $ 11,680 $ 372 $ 5,612 $ 17,664 $ 1,330 $ 832 $ 7,769 $ 9,931 Total Past Due $ 26,487 $ 4,902 $ 20,838 $ 52,227 $ 28,467 $ 1,407 $ 27,062 $ 56,936 __________________________________ (1) Acquired Loans exclude PCI loans. Loans accounted for under ASC 310-30 are generally considered accruing and performing and the accretable discount is accreted to interest income over the estimated life of the loan when cash flows are reasonably estimable. Accordingly, PCI loans that are contractually past due can still considered to be accruing and performing loans. The loans may be classified as nonaccrual if the timing and amount of future cash flows is not reasonably estimable. The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt, including, but not limited to, current financial information, historical payment experience, credit documentation, public information, and current economic trends. The Company analyzes loans individually by classifying the loans as to credit risk. This analysis includes all loans with the exception of homogeneous loans, or loans that are evaluated together in pools of similar loans (i.e., home mortgage loans, home equity lines of credit, overdraft loans, express business loans, and automobile loans). Homogeneous loans are not risk rated and credit risk is analyzed largely by the number of days past due. This analysis is performed at least on a quarterly basis. The definitions for risk ratings are as follows: • Pass: Loans that meet a preponderance or more of the Company’s underwriting criteria and evidence an acceptable level of risk. • Special Mention: Loans that have potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position at some future date. • Substandard: Loans that are inadequately protected by the current net worth and paying capacity of the borrower or by the collateral pledged, if any. Loans in this classification have a well-defined weakness or weaknesses that jeopardize the repayment of the debt. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. • Doubtful: Loans that have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or repayment in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. The following tables present the recorded investment of risk ratings for Legacy and Acquired Loans as of September 30, 2019 and December 31, 2018 by class of loans: As of September 30, 2019 Pass/ Not Rated Special Mention Substandard Doubtful Total (Dollars in thousands) Legacy Loans: Real estate – residential $ 42,148 $ — $ 144 $ — $ 42,292 Real estate – commercial Retail 1,863,725 28,749 34,341 — 1,926,815 Hotel & motel 1,412,952 419 30,527 — 1,443,898 Gas station & car wash 790,464 3,858 4,588 — 798,910 Mixed use 575,998 1,496 9,180 — 586,674 Industrial & warehouse 752,813 1,459 34,685 — 788,957 Other 1,370,768 21,218 32,757 — 1,424,743 Real estate – construction 278,109 9,880 7,031 — 295,020 Commercial business 2,354,480 34,643 28,942 17 2,418,082 Trade finance 161,019 — — — 161,019 Consumer and other 755,988 170 2,323 — 758,481 Subtotal $ 10,358,464 $ 101,892 $ 184,518 $ 17 $ 10,644,891 Acquired Loans: Real estate – residential $ 3,919 $ 385 $ 323 $ — $ 4,627 Real estate – commercial Retail 348,739 6,489 12,650 — 367,878 Hotel & motel 151,908 159 11,766 — 163,833 Gas station & car wash 114,550 — 4,379 — 118,929 Mixed use 79,384 7,154 4,260 — 90,798 Industrial & warehouse 145,147 4,404 10,829 — 160,380 Other 331,772 8,564 23,688 — 364,024 Real estate – construction — 10,165 — — 10,165 Commercial business 50,333 623 13,779 — 64,735 Trade finance — — — — — Consumer and other 109,827 13 2,413 — 112,253 Subtotal $ 1,335,579 $ 37,956 $ 84,087 $ — $ 1,457,622 Total $ 11,694,043 $ 139,848 $ 268,605 $ 17 $ 12,102,513 As of December 31, 2018 Pass/ Special Mention Substandard Doubtful Total (Dollars in thousands) Legacy Loans: Real estate – residential $ 44,066 $ — $ 546 $ — $ 44,612 Real estate – commercial Retail 1,815,170 18,072 30,686 — 1,863,928 Hotel & motel 1,389,349 21,932 15,869 — 1,427,150 Gas station & car wash 814,291 2,810 2,464 — 819,565 Mixed use 510,021 12,480 13,292 — 535,793 Industrial & warehouse 711,236 1,665 38,332 — 751,233 Other 1,326,795 35,539 34,618 — 1,396,952 Real estate – construction 227,231 10,904 — — 238,135 Commercial business 1,944,783 18,220 54,688 — 2,017,691 Trade finance 191,508 — 2,558 — 194,066 Consumer and other 910,292 — 441 — 910,733 Subtotal $ 9,884,742 $ 121,622 $ 193,494 $ — $ 10,199,858 Acquired Loans: Real estate – residential $ 5,812 $ 393 $ 380 $ — $ 6,585 Real estate – commercial Retail 483,939 4,651 17,332 35 505,957 Hotel & motel 186,761 807 19,472 — 207,040 Gas station & car wash 148,702 274 6,032 — 155,008 Mixed use 77,100 3,986 8,151 — 89,237 Industrial & warehouse 171,574 9,451 18,071 223 199,319 Other 402,247 12,902 28,996 — 444,145 Real estate – construction 29,058 7,883 — — 36,941 Commercial business 89,611 1,083 19,237 8 109,939 Trade finance — — 3,124 — 3,124 Consumer and other 136,944 37 3,626 146 140,753 Subtotal $ 1,731,748 $ 41,467 $ 124,421 $ 412 $ 1,898,048 Total $ 11,616,490 $ 163,089 $ 317,915 $ 412 $ 12,097,906 The Company may reclassify loans held for investment to loans held for sale in the event that the Company plans to sell loans that were originated with the intent to hold to maturity. Loans transferred from held for investment to held for sale are carried at the lower of cost or fair value. The breakdown of loans by type that were reclassified from held for investment to held for sale for the three and nine months ended September 30, 2019 and 2018 is presented in the following table: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Transfer of loans held for investment to held for sale (Dollars in thousands) Real estate - commercial $ 25,988 $ — $ 25,988 $ — Consumer — 525 82,991 6,680 Total $ 25,988 $ 525 $ 108,979 $ 6,680 The adequacy of the allowance for loan losses is determined by management based upon an evaluation and review of the credit quality of the loan portfolio, consideration of historical loan loss experience, relevant internal and external factors that affect the collection of loans, and other pertinent factors. Migration analysis is a formula methodology derived from the Bank’s actual historical net charge off experience for each loan class (type) or pool and risk grade. The migration analysis is centered on the Bank’s internal credit risk rating system. Management’s internal loan review and externally contracted credit review examinations are used to determine and validate loan risk grades. This credit review system takes into consideration factors such as: borrower’s background and experience; historical and current financial conditions; credit history and payment performance; economic conditions and their impact on various industries; type, fair value, and valuation volatility of collateral; lien positions; and the financial strength of any guarantors. A general loan loss allowance is provided on loans that are not specifically identified as impaired (“non-impaired loans”). The Bank’s general loan loss allowance has two components: quantitative and qualitative risk factors. The quantitative risk factors are based on the migration analysis methodology described above. Loans are classified by class and risk grade, and the historical loss migration is tracked for the various classes. Loss experience is quantified for a specified period and then weighted to place more significance on the most recent losses. That loss experience is then applied to the stratified portfolio at the end of each quarter. The Company utilizes nineteen non-homogeneous loan pools in the quantitative analysis process. The non-impaired commercial real estate loan portfolio is stratified into fourteen different loan pools based on property types and the non-impaired commercial and industrial and consumer loans are stratified into five different loan pools based on loan type in order to allocate historic loss experience on a more granular basis. Additionally, in order to systematically quantify the credit risk impact of other trends and changes within the loan portfolio, the Bank utilizes qualitative adjustments to the migration analysis within established parameters. The parameters for making adjustments are established under a Credit Risk Matrix that provides different possible scenarios for each of the factors below. The Credit Risk Matrix and the possible scenarios enable the Bank to qualitatively adjust the Loss Migration Ratio by as much as 50 basis points for each loan type pool. This matrix considers the following nine factors, which are patterned after the guidelines provided under the Federal Financial Institutions Examination Council (“FFIEC”) Interagency Policy Statement on the Allowance for Loan and Lease Losses: • Changes in lending policies and procedures, including underwriting standards and collection, charge off, and recovery practices; • Changes in national and local economic and business conditions and developments, including the condition of various market segments; • Changes in the nature and volume of the loan portfolio; • Changes in the experience, ability, and depth of lending management and staff; • Changes in the trends of the volume and severity of past due loans, classified loans, nonaccrual loans, troubled debt restructurings, and other loan modifications; • Changes in the quality of the loan review system and the degree of oversight by the Directors; • Changes in the value of underlying collateral for collateral-dependent loans; • The existence and effect of any concentrations of credit and changes in the level of such concentrations; and • The effect of external factors, such as competition, legal requirements, and regulatory requirements on the level of estimated losses in the loan portfolio. The Company also establishes specific loss allowances for loans that have identified potential credit risk conditions or circumstances related to a specific individual credit. The specific allowance amounts are determined in accordance with ASC 310-10-35-22, “Measurement of Impairment.” The loans identified as impaired will be accounted for in accordance with one of the three acceptable valuation methods: 1) the present value of future cash flows discounted at the loan’s effective interest rate; 2) the loan’s observable market price; or 3) the fair value of the collateral, if the loan is collateral dependent. For the collateral dependent impaired loans, management obtains a new appraisal to determine the amount of impairment as of the date that the loan became impaired. The appraisals are based on an “as-is” valuation. To ensure that appraised values remain current, management either obtains updated appraisals every twelve months from a qualified independent appraiser or an internal evaluation of the collateral is performed by qualified personnel. If the third party market data indicates that the value of the collateral property has declined since the most recent valuation date, management adjusts the value of the property downward to reflec

Leases

Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	Leases On January 1, 2019, the Company adopted ASU 2016-02, “Leases (Topic 842)”, using the modified retrospective approach under ASC 842 (See footnote 2 “Basis of Presentation” for additional information regarding adoption of ASU 2016-02). The Company’s operating leases are real estate leases which are comprised of bank branches, loan production offices, and office spaces with remaining lease terms ranging from 1 to 11 years as of September 30, 2019 . Certain lease arrangements contain extension options which are typically around 5 years . As these extension options are not generally considered reasonably certain of exercise, they are not included in the lease term. At September 30, 2019 , operating lease right-of-use (“ROU”) assets and related liabilities were $60.9 million and $62.5 million , respectively. At September 30, 2019 , the short term operating lease liability totaled $12.6 million and the long term operating lease liability totaled $49.9 million . The Company defines short term operating lease liabilities as liabilities due in twelve months or less and long term lease liabilities are defined as liabilities that are due in more than twelve months at the end of each reporting period. The Company did not have any finance leases at September 30, 2019 . During the nine months ended September 30, 2019 , the Company extended five leases and had no new leases. Lease extension were for five years each and the Company reassessed the ROU asset and lease liability related to these leases. Operating lease ROU assets represent the Company’s right to use the underlying asset during the lease term and operating lease liabilities represent the Company’s obligation to make lease payments arising from the lease. ROU assets and operating lease liabilities are recognized at lease commencement based on the present value of the remaining lease payments using the Company’s incremental borrowing rate at the lease commencement date. Operating lease expense, which is comprised of amortization of the ROU asset and the implicit interest accreted on the operating lease liability, is recognized on a straight-line basis over the lease term and is recorded in occupancy expense in the Consolidated Statements of Income. The Company’s occupancy expense also includes variable lease costs which is comprised of the Company's share of actual costs for utilities, common area maintenance, property taxes, and insurance that are not included in lease liabilities and are expensed as incurred. Variable lease costs can also include rent escalations based on changes to indices, such as the Consumer Price Index, where the Company estimates future rent increases and records the actual difference to variable costs. The Company uses its incremental borrowing rate to present value lease payments in order to recognize a ROU asset and the related lease liability. The Company calculates its incremental borrowing rate by adding a spread to the FHLB borrowing interest rate at a given period. The table below summarizes the Company’s net lease cost: Three Months Ended Nine Months Ended (Dollars in thousands) Operating lease cost $ 3,850 $ 12,130 Short term lease cost — 9 Variable lease cost 875 2,411 Sublease income (157 ) (470 ) Net lease cost $ 4,568 $ 14,080 Rent expense for the three and nine months ended September 30, 2019 was $4.6 million and $14.2 million , respectively. Rent expense for the three and nine months ended September 30, 2018 was $4.8 million and $13.8 million , respectively. The table below summarizes other information related to the Company’s operating leases: At or for the Three Months Ended At or for the Nine Months Ended (Dollars in thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash outflows for operating leases $ 3,649 $ 11,021 Right-of-use assets obtained in exchange for lease liabilities, net — 65,263 Weighted-average remaining lease term - operating leases 6.01 years 6.01 years Weighted-average discount rate - operating leases 3.11 % 3.11 % The table below summarizes the maturity of remaining lease liabilities: September 30, 2019 (Dollars in thousands) 2019 $ 3,667 2020 14,200 2021 13,496 2022 9,420 2023 7,352 2024 and thereafter 20,804 Total lease payments 68,939 Less: imputed interest 6,441 Total lease obligations $ 62,498 As of September 30, 2019 , the Company did not have any additional operating lease commitments that have not yet commenced.

Deposits

Deposits	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Deposits	Deposits The aggregate amount of time deposits in denominations of more than $250 thousand at September 30, 2019 and December 31, 2018 , was $1.86 billion and $1.77 billion , respectively. Included in time deposits of more than $250 thousand were $300.0 million in California State Treasurer’s deposits at September 30, 2019 and December 31, 2018 . The California State Treasurer’s deposits are subject to withdrawal based on the State’s periodic evaluations. The Company is required to pledge eligible collateral of at least 110% of outstanding deposits. At September 30, 2019 and December 31, 2018 , securities with fair values of approximately $336.6 million and $336.8 million , respectively, were pledged as collateral for the California State Treasurer’s deposit. The Company also utilizes brokered deposits as a secondary source of funds. Total brokered deposits at September 30, 2019 and December 31, 2018 , totaled $1.25 billion and $1.57 billion , respectively. Brokered deposits at September 30, 2019 consisted of $32.5 million in demand deposit accounts, $416.6 million in money market and NOW accounts, and $797.4 million in time deposits accounts. Brokered deposits at December 31, 2018 consisted of $370.4 million in money market and NOW accounts and $1.20 billion

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Borrowings	Borrowings The Company maintains a line of credit with the Federal Home Loan Bank (“FHLB”) of San Francisco as a secondary source of funds. The borrowing capacity with the FHLB is limited to the lower of 25% of the Bank’s total assets or the Bank’s collateral capacity, which was $3.83 billion at September 30, 2019 , and $3.81 billion at December 31, 2018 . The terms of this credit facility require the Company to pledge eligible collateral with the FHLB equal to at least 100% of outstanding advances. The Company also has an unsecured credit facility with the FHLB that totaled $95.0 million and $91.0 million at September 30, 2019 and December 31, 2018 , respectively. At September 30, 2019 and December 31, 2018 , real estate secured loans with a carrying amount of approximately $6.82 billion and $6.01 billion , respectively, were pledged at the FHLB for outstanding advances and remaining borrowing capacity. At September 30, 2019 and December 31, 2018 , other than FHLB stock, no securities were pledged as collateral at the FHLB. The purchase of FHLB stock is a prerequisite to become a member of the FHLB system, and the Company is required to own a certain amount of FHLB stock based on outstanding borrowings. At September 30, 2019 and December 31, 2018 , FHLB advances totaling $625.0 million and $821.3 million , respectively, and had weighted average effective interest rates of 1.92% and 1.78% , respectively. FHLB advances at September 30, 2019 and December 31, 2018 had various maturities through December 2022 . The effective interest rate of FHLB advances as of September 30, 2019 ranged between 1.35% and 2.39% . At September 30, 2019 , the Company’s remaining borrowing capacity with the FHLB was $3.18 billion . Although the Company maintains borrowing lines with other banks, there were no federal funds purchased from other banks at September 30, 2019 and December 31, 2018 . At September 30, 2019 , the contractual maturities for outstanding FHLB advances were as follows: September 30, 2019 Scheduled maturities in: (Dollars in thousands) 2019 $ 150,000 2020 185,000 2021 145,000 2022 145,000 Total $ 625,000 As a member of the Federal Reserve Bank (“FRB”) system, the Bank may also borrow from the FRB of San Francisco. The maximum amount that the Bank may borrow from the FRB’s discount window is up to 95% of the fair market value of the qualifying loans and securities that are pledged. At September 30, 2019 , the outstanding principal balance of the qualifying loans pledged at the FRB was $964.4 million and there were no investment securities pledged. At September 30, 2019 and December 31, 2018 , the total available borrowing capacity at the FRB discount window was $766.4 million and $786.6 million , respectively. There were no borrowings outstanding at the FRB discount window as of September 30, 2019 and December 31, 2018 .

Subordinated Debentures and Con

Subordinated Debentures and Convertible Notes	9 Months Ended
	Sep. 30, 2019
Subordinated Borrowings [Abstract]
Subordinated Debentures and Convertible Notes	Subordinated Debentures and Convertible Notes Subordinated Debt At September 30, 2019 , the Company had nine wholly owned subsidiary grantor trusts that had issued $126.0 million of pooled trust preferred securities. Trust preferred securities accrue and pay distributions periodically at specified annual rates as provided in the indentures. The trusts used the net proceeds from the offering to purchase a like amount of subordinated debentures (the “Debentures”). The Debentures are the sole assets of the trusts. The Company’s obligations under the subordinated debentures and related documents, taken together, constitute a full and unconditional guarantee by the Company of the obligations of the trusts. The trust preferred securities are mandatorily redeemable upon the maturity of the Debentures, or upon earlier redemption as provided in the indentures. The Company has the right to redeem the Debentures in whole (but not in part) on a quarterly basis at a redemption price specified in the indentures plus any accrued but unpaid interest to the redemption date. The Company also has a right to defer consecutive payments of interest on the debentures for up to five years . The following table is a summary of trust preferred securities and Debentures at September 30, 2019 : Issuance Trust Issuance Date Trust Preferred Security Amount Carrying Rate Type Current Rate Maturity Date (Dollars in thousands) Nara Capital Trust III 06/05/2003 $ 5,000 $ 5,155 Variable 5.27% 06/15/2033 Nara Statutory Trust IV 12/22/2003 5,000 5,155 Variable 5.15% 01/07/2034 Nara Statutory Trust V 12/17/2003 10,000 10,310 Variable 5.09% 12/17/2033 Nara Statutory Trust VI 03/22/2007 8,000 8,248 Variable 3.77% 06/15/2037 Center Capital Trust I 12/30/2003 18,000 14,182 Variable 5.15% 01/07/2034 Wilshire Trust II 03/17/2005 20,000 15,688 Variable 3.93% 03/17/2035 Wilshire Trust III 09/15/2005 15,000 11,087 Variable 3.52% 09/15/2035 Wilshire Trust IV 07/10/2007 25,000 17,970 Variable 3.50% 09/15/2037 Saehan Capital Trust I 03/30/2007 20,000 14,960 Variable 3.72% 06/30/2037 Total $ 126,000 $ 102,755 The carrying value of Debentures at September 30, 2019 and December 31, 2018 was $102.8 million and $101.9 million , respectively. At September 30, 2019 and December 31, 2018 , acquired Debentures had remaining discounts of $27.1 million , and $28.0 million . The carrying balance of Debentures is net of remaining discounts and includes common trust securities. The Company’s investment in the common trust securities of the issuer trusts was $3.9 million at September 30, 2019 and December 31, 2018 and is included in other assets. Although the subordinated debt issued by the trusts are not included as a component of stockholders’ equity in the Consolidated Statements of Financial Condition, the debt is treated as capital for regulatory purposes. The Company’s trust preferred security debt issuances (less common trust securities) are includable in Tier 1 capital up to a maximum of 25% of capital on an aggregate basis as they were grandfathered in under BASEL III. Any amount that exceeds 25% qualifies as Tier 2 capital. Convertible Notes On May 11, 2018, the Company issued $200 million aggregate principal amount of 2.00% convertible senior notes maturing on May 15, 2038 in a private offering to qualified institutional buyers under Rule 144A of the Securities Act of 1933. Subsequently on June 7, 2018, an additional $17.5 million in convertible notes were issued as part of the initial offering over-allotment option. In total, the Company issued $217.5 million in convertible notes during the second quarter of 2018. The convertible notes can be converted into shares of the Company’s common stock at an initial rate of 45.0760 shares per $1,000 principal amount of the notes (equivalent to an initial conversion price of approximately $22.18 per share of common stock which represents a premium of 22.5% to the closing stock price on the date of the pricing of the notes). Holders of the convertible notes have the option to convert all or a portion of the notes at any time on or after February 15, 2023. Prior to February 15, 2023, the convertible notes cannot be converted unless under certain specified scenarios. The convertible notes can be called by the Company, in part or in whole, on or after May 20, 2023 for 100% of the principal amount in cash. Holders of the convertible notes also have the option to put the notes back to the Company on May 15, 2023, May 15, 2028, or May 15, 2033 for 100% of the principal amount in cash. The convertible notes can be settled in cash, stock, or a combination of stock and cash at the option of the Company. The convertible notes were issued as part of the Company’s plan to repurchase its common stock. On April 26, 2018, the Company’s Board of Directors approved a share repurchase program that authorized the Company to use up to $100.0 million of the proceeds from the convertible notes offering to repurchase its common stock. The net proceeds from the offering, after deducting the initial purchaser’s discount, was approximately $213.2 million . Of the total net proceeds, $113.2 million was down-streamed to the Bank as equity and the remaining $100.0 million was allocated for share repurchases. The Company used approximately $76.0 million of the allocated $100.0 million to repurchase shares of its common stock from purchasers of the convertible notes in privately negotiated transactions at a purchase price per share equal to the $18.11 per share closing price of the Company’s common stock on May 11, 2018. The Company repurchased the remaining $24.0 million in stock on the open market during the second and third quarter of 2018. In accordance with accounting principles, the convertible notes issued by the Company were separated into a debt component and an equity component which represents the stock conversion option. The present value of the convertible notes was calculated based on a discount rate of 4.25% , which represented the current offering rate for similar types of debt without conversion options. The effective life of the convertible notes was estimated to be five years based on the first call and put date. The difference between the principal amount of the notes and the present value was recorded as the convertible note discount and additional paid-in capital. The issuance costs related to the offering were also allocated into a debt component to be capitalized, and an equity component in the same percentage allocation of debt and equity of the convertible note. The value of the convertible note at issuance and carrying value as of September 30, 2019 and December 31, 2018 is presented in the tables below: As of September 30, 2019 Amortization/ Capitalization Period Gross Accumulated Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 217,500 $ — $ 217,500 Discount 5 years (21,880 ) 5,614 (16,266 ) Issuance costs to be capitalized 5 years (4,119 ) 1,096 (3,023 ) Carrying balance of convertible notes $ 191,501 $ 6,710 $ 198,211 As of December 31, 2018 Amortization/ Capitalization Period Gross Accumulated Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 217,500 $ — $ 217,500 Discount 5 years (21,880 ) 2,544 (19,336 ) Issuance costs to be capitalized 5 years (4,119 ) 498 (3,621 ) Carrying balance of convertible notes $ 191,501 $ 3,042 $ 194,543 Interest expense on the convertible notes for the three and nine months ended September 30, 2019 totaled $2.3 million and $6.9 million , respectively. Interest expense on the convertible notes for the three and nine months ended September 30, 2018 totaled $2.3 million and $3.5 million , respectively. Interest expense for the Company’s convertible notes includes accrued interest on the convertible note coupon, non-cash interest expense representing the conversion option or note discount, and interest expense from capitalized issuance costs. Non-cash interest expense and issuance cost capitalization expense will only be recorded for the first five outstanding years of the convertible notes. Subsequent to May 15, 2023, interest expense on the convertible notes will consist of only accrued interest on the coupon.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Company offers a loan hedging program to certain loan customers. Through this program, the Company originates a variable rate loan with the customer. The Company and the customer will then enter into a fixed interest rate swap. Lastly, an identical offsetting swap is entered into by the Company with a correspondent bank. These “back-to-back” swap arrangements are intended to offset each other and allow the Company to book a variable rate loan, while providing the customer with a contract for fixed interest payments. In these arrangements, the Company’s net cash flow is equal to the interest income received from the variable rate loan originated with the customer. These customer swaps are not designated as hedging instruments and are recorded at fair value in other assets and other liabilities. The changes in fair value is recognized in the income statement in other income and fees. At September 30, 2019 and December 31, 2018 , interest rate swaps related to the Company’s loan hedging program that were outstanding is presented in the following table: September 30, 2019 December 31, 2018 (Dollars in thousands) Interest rate swaps on loans with correspondent banks Notional amount $ 16,663 $ 237,916 Weighted average remaining term (years) 3.2 6.8 Pay fixed rate (weighted average) 3.91 % 4.36 % Received variable rate (weighted average) 4.62 % 4.69 % Estimated fair value $ 35 $ 6,191 Interest rate swaps on loans with correspondent banks Notional amount $ 360,113 $ 36,972 Weighted average remaining term (years) 7.0 6.4 Pay fixed rate (weighted average) 4.28 % 5.12 % Received variable rate (weighted average) 4.26 % 4.56 % Estimated fair value $ (14,558 ) $ (868 ) Back to back interest rate swaps with loan customers Notional amount $ 16,663 $ 237,916 Weighted average remaining term (years) 3.2 6.8 Received fixed rate (weighted average) 3.91 % 4.36 % Pay variable rate (weighted average) 4.62 % 4.69 % Estimated fair value $ (35 ) $ (6,191 ) Back to back interest rate swaps with loan customers Notional amount $ 360,113 $ 36,972 Weighted average remaining term (years) 7.0 6.4 Received fixed rate (weighted average) 4.28 % 5.12 % Pay variable rate (weighted average) 4.26 % 4.56 % Estimated fair value $ 14,558 $ 868 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. Residential mortgage loans funded with interest rate lock commitments and forward commitments for the future delivery of mortgage loans to third party investors are considered derivatives. At September 30, 2019 , the Company had approximately $7.7 million in interest rate lock commitments and total forward sales commitments for the future delivery of residential mortgage loans. At December 31, 2018 , the Company had approximately $874 thousand in interest rate lock commitments and total forward sales commitments for the future delivery of residential mortgage loans. The following table reflects the notional amount and fair value of mortgage banking derivatives for the dates indicated: As of September 30, 2019 As of December 31, 2018 Notional Amount Fair Value Notional Amount Fair Value (Dollars in thousands) Assets: Interest rate lock commitments $ 7,010 $ 48 $ 874 $ 10 Forward sale contracts related to mortgage banking $ 4,785 $ 23 $ — $ — Liabilities: Interest rate lock commitments $ 658 $ (3 ) $ — $ — Forward sale contracts related to mortgage banking $ 2,883 $ (4 ) $ 874 $ 3

Commitments and contingencies

Commitments and contingencies	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In the normal course of business, the Company is a party to financial instruments with off-balance sheet risk that are used to meet the financing needs of 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, and mortgage derivatives. 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. The Company’s 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. The Company uses the same credit policies in making commitments and conditional obligations as the Company does for extending loan facilities to customers. The Company evaluates 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 the Company’s credit evaluation of the counterparty. The types of collateral that the Company may hold can vary and may include accounts receivable, inventory, property, plant and equipment, and income-producing properties. Commitments at September 30, 2019 and December 31, 2018 are summarized as follows: September 30, 2019 December 31, 2018 (Dollars in thousands) Commitments to extend credit $ 1,743,145 $ 1,712,032 Standby letters of credit 111,665 69,763 Other letters of credit 39,166 65,822 Commitments to fund investments in affordable housing partnerships 32,635 46,507 In the normal course of business, the Company is involved in various legal claims. The Company has reviewed all legal claims against the Company with counsel and has taken into consideration the views of such counsel as to the potential outcome of the claims. Loss contingencies for all legal claims totaled $285 thousand at September 30, 2019 and $755 thousand at December 31, 2018 . It is reasonably possible the Company may incur losses in addition to the amounts currently accrued. However, at this time, the Company is 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 that the Company believes has little to no merit. The Company has considered these and other possible loss contingencies and does not expect the amounts to be material to the consolidated financial statements.

Goodwill, Intangible Assets, an

Goodwill, Intangible Assets, and Servicing Assets	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Intangible Assets, and Servicing Assets	Goodwill, Intangible Assets, and Servicing Assets Goodwill represents the excess of the purchase price over the sum of the estimated fair values of the tangible and identifiable intangible assets acquired less the estimated fair value of the liabilities assumed. Goodwill has an indefinite useful life and is evaluated for impairment annually or more frequently if events and circumstances indicate that the asset might be impaired. An impairment loss is recognized to the extent that the carrying amount exceeds the asset’s fair value. At December 31, 2018, the Company assessed the qualitative factors related to intangible assets and goodwill and for the year to determine whether it was more-likely-than-not that the fair value was less than its carrying amount. Based on the analysis of these factors, management determined that it was more-likely-than-not that intangible assets were not impaired and that the fair value of goodwill exceeded the carrying value and that the two-step goodwill impairment test was not needed. Goodwill is not amortized for book purposes and is not tax deductible. The carrying amount of the Company’s goodwill as of September 30, 2019 and December 31, 2018 was $464.5 million . There was no impairment of goodwill during the three and nine months ended September 30, 2019 . Core deposit intangible assets are amortized over their estimated lives, which range from seven to ten years. Amortization expense related to core deposit intangible assets totaled $557 thousand and $615 thousand for the three months ended September 30, 2019 and 2018 , respectively. The amortization expense related to core deposit intangible assets totaled $1.7 million and $1.8 million for the nine months ended September 30, 2019 and 2018 , respectively. The following table provides information regarding the core deposit intangibles at September 30, 2019 and December 31, 2018 : As of September 30, 2019 As of December 31, 2018 Core Deposit Intangibles Related To: Amortization Period Gross Amount Accumulated Amortization Carrying Amount Accumulated Carrying Amount (Dollars in thousands) Center Financial acquisition 7 years $ 4,100 $ (4,100 ) $ — $ (4,100 ) $ — Pacific International Bank acquisition 7 years 604 (597 ) 7 (579 ) 25 Foster Bankshares acquisition 10 years 2,763 (2,063 ) 700 (1,893 ) 870 Wilshire Bancorp acquisition 10 years 18,138 (6,455 ) 11,683 (4,972 ) 13,166 Total $ 25,605 $ (13,215 ) $ 12,390 $ (11,544 ) $ 14,061 Servicing assets are recognized when SBA and residential mortgage loans are sold with the servicing retained by the Company and the related income is recorded as a component of gains on sales of loans. Servicing assets are initially recorded at fair value based on the present value of the contractually specified servicing fee, net of servicing costs, over the estimated life of the loan, using a discount rate. The Company’s servicing costs approximates the industry average servicing costs of 40 basis points. All classes of servicing assets are subsequently measured using the amortization method which requires servicing rights to be amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. Management periodically evaluates servicing assets for impairment based upon the fair value of the rights as compared to the carrying amount. Impairment is determined by stratifying rights into groupings based on loan type. Impairment is recognized through a valuation allowance for an individual grouping, to the extent that fair value is less than the carrying amount. As of September 30, 2019 and December 31, 2018 , the Company did not have a valuation allowance on it servicing assets. The changes in servicing assets for the three and nine months ended September 30, 2019 and 2018 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (Dollars in thousands) Balance at beginning of period $ 19,997 $ 25,050 $ 23,132 $ 24,710 Additions through originations of servicing assets 437 1,503 1,383 4,819 Amortization (2,569 ) (2,199 ) (6,650 ) (5,845 ) Adjustments — — — 670 Balance at end of period $ 17,865 $ 24,354 $ 17,865 $ 24,354 Loans serviced for others are not reported as assets. The principal balances of loans serviced for other institutions were $1.46 billion as of September 30, 2019 and $1.55 billion as of December 31, 2018 . The Company utilizes the discounted cash flow method to calculate the initial excess servicing assets. The inputs used in evaluating servicing assets for impairment at September 30, 2019 and December 31, 2018 are presented below. September 30, 2019 December 31, 2018 SBA Servicing Assets: Weighted-average discount rate 10.52% 11.23% Constant prepayment rate 14.02% 11.09% Mortgage Servicing Assets: Weighted-average discount rate 9.13% 10.25% Constant prepayment rate 9.78% 7.13%

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three months ended September 30, 2019 , the Company had an income tax provision totaling $14.6 million on pretax income of $57.2 million , representing an effective tax rate of 25.48% , compared with an income tax provision of $15.5 million on pretax income of $61.8 million , representing an effective tax rate of 25.00% for the three months ended September 30, 2018 . For the nine months ended September 30, 2019 , the Company had an income tax provision totaling $43.3 million on pretax income of $171.3 million , representing an effective tax rate of 25.26% , compared with an income tax provision of $49.8 million on pretax income of $195.0 million , representing an effective tax rate of 25.56% for the nine months ended September 30, 2018 . The changes in effective tax rate for the three and nine months ended September 30, 2019 compared to the three and nine months ended September 30, 2018 was due to various immaterial permanent book tax adjustments including affordable housing partnership investment tax credits. The Company and its subsidiaries are subject to U.S. federal income tax, as well as state income taxes. The Company had total unrecognized tax benefits of $2.3 million at September 30, 2019 and $2.3 million at December 31, 2018 , that relate to uncertainties associated with federal and state income tax matters. The Company recognizes interest and penalties on income tax matters in income tax expense. The Company recorded approximately $544 thousand and $470 thousand , for accrued interest ( no portion was related to penalties) at September 30, 2019 and December 31, 2018 , respectively. Management believes it is reasonably possible that the unrecognized tax benefits may decrease by $2.3 million in the next twelve months due to a settlement with the state tax authorities. The statute of limitations for the assessment of income taxes related to the consolidated federal income tax returns is closed for all tax years up to and including 2015. The expiration of the statute of limitations for the assessment of income and franchise taxes related to the various state income and franchise tax returns varies by state. The Company is currently under examination by the California Franchise Tax Board (“FTB”) for the 2011, 2012, 2013 and 2014 tax years. During the quarter ended September 30, 2019, the Texas Comptroller completed examinations for the 2015, 2016, and 2017 tax years without any adjustments. Wilshire Bancorp, Inc., an acquired entity, is currently under examination by the FTB for the 2011, 2012, and 2013 tax years. While the outcome of the examinations is unknown, the Company expects no material adjustments. Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities (without regard to certain changes to deferred taxes). Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion, or all, of the deferred tax asset will not be realized. In assessing the realization of deferred tax assets, management evaluates both positive and negative evidence, including the existence of any cumulative losses in the current year and the prior two years, the amount of taxes paid in available carry-back years, the forecasts of future income, applicable tax planning strategies, and assessments of current and future economic and business conditions. This analysis is updated quarterly and adjusted as necessary. Based on the analysis, the Company has determined that a valuation allowance for deferred tax assets was not required as of September 30, 2019 .

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Fair value is defined as the exchange price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date reflecting assumptions that a market participant would use when pricing an asset or liability. There are three levels of inputs that may be used to measure fair value. The fair value inputs of the instruments are classified and disclosed in one of the following 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 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 unobservable for the asset or liability. Unobservable inputs are 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. The Company’s 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 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: Securities Available for Sale The fair values of securities available for sale are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1 inputs) or matrix pricing, which is a technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs). The fair values of the Company’s Level 3 securities available for sale were measured using an income approach valuation technique. The primary inputs and assumptions used in the fair value measurement was derived from the security’s underlying collateral, which included discount rate, prepayment speeds, payment delays, and an assessment of the risk of default of the underlying collateral, among other factors. Significant increases or decreases in any of the inputs or assumptions could result in a significant increase or decrease in the fair value measurement. Equity Investments With Readily Determinable Fair Value The fair value of the Company’s equity investments with readily determinable fair value is comprised of mutual funds. The fair value for these investments is obtained from unadjusted quoted prices in active markets on the date of measurement and is therefore classified as Level 1. Interest Rate Swaps The Company offers interest rate swaps to certain loan customers to allow them to hedge the risk of rising interest rates on their variable rate loans. The Company originates a variable rate loan and enters into a variable-to-fixed interest rate swap with the customer. The Company also enters into an offsetting swap with a correspondent bank. These back-to-back agreements are intended to offset each other and allow the Company to originate a variable rate loan, while providing a contract for fixed interest payments for the customer. The net cash flow for the Company is equal to the interest income received from a variable rate loan originated with the customer. The fair value of these derivatives is based on a discounted cash flow approach. Due to the observable nature of the inputs used in deriving the fair value of these derivative contracts, the valuation of interest rate swaps is classified as Level 2. 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. Impaired Loans The fair values of impaired loans are generally measured for impairment using the practical expedients permitted by FASB ASC 310-10-35 including impaired loans measured at an observable market price (if available), or at the fair value of the loan’s collateral (if the loan is collateral dependent). Fair value of the loan’s collateral, when the loan is dependent on collateral, is determined by appraisals or independent valuation, less costs to sell of 8.5% . Appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and income approach. Adjustment may be made in the appraisal process by the independent appraiser to adjust for differences between the comparable sales and income data available for similar loans and the underlying collateral. For commercial and industrial and asset backed loans, independent valuations may include a 20 - 60% discount for eligible accounts receivable and a 50 - 70% discount for inventory. These result in a Level 3 classification. OREO OREO is fair valued at the time the loan is foreclosed upon and the asset is transferred to OREO. The value is based primarily on third party appraisals, less costs to sell of up to 8.5% and result in a Level 3 classification of the inputs for determining fair value. OREO is reviewed and evaluated on at least a quarterly basis for additional impairment and adjusted to lower of cost or market accordingly, based on the same factors identified above. Loans held for sale Loans held for sale are carried at the lower of cost or fair value, as determined by outstanding commitments from investors, or based on recent comparable sales (Level 2 inputs), if available, and if not available, are based on discounted cash flows using current market rates applied to the estimated life and credit risk (Level 3 inputs) or may be assessed based upon the fair value of the collateral, which is obtained from recent real estate appraisals (Level 3 inputs). These appraisals may utilize a single valuation approach or a combination of approaches including the income approach. Adjustments are routinely made in the appraisal process by the appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are typically significant and result in Level 3 classification of the inputs for determining fair value. Assets and liabilities measured at fair value on a recurring basis are summarized below: Fair Value Measurements at the End of September 30, 2019 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Assets: Securities available for sale: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 801,071 $ — $ 801,071 $ — Mortgage-backed securities: Residential 332,123 — 332,123 — Commercial 563,108 — 563,108 — Corporate securities 3,898 — 3,898 — Municipal securities 72,122 — 71,014 1,108 Equity investments with readily determinable fair value 22,228 22,228 — — Interest rate swaps 14,593 — 14,593 — Mortgage banking derivatives 71 — 71 — Liabilities: Interest rate swaps 14,593 — 14,593 — Mortgage banking derivatives 7 — 7 — Fair Value Measurements at the End of the Reporting Period Using December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Assets: Securities available for sale: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 895,122 $ — $ 895,122 $ — Mortgage-backed securities: Residential 402,605 — 402,605 — Commercial 469,126 — 469,126 — Corporate securities 3,826 — 3,826 — Municipal securities 75,586 — 74,527 1,059 Equity investments with readily determinable fair value 23,405 23,405 — — Interest rate swaps 7,059 — 7,059 — Mortgage banking derivatives 10 — 10 — Liabilities: Interest rate swaps 7,059 — 7,059 — Mortgage banking derivatives 3 — 3 — There were no transfers between Level 1, 2, and 3 during the three and nine months ended September 30, 2019 and 2018 . The table below presents a reconciliation and income statement classification of gains (losses) for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and nine months ended September 30, 2019 and 2018 : Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (Dollars in thousands) Beginning Balance $ 1,087 $ 1,065 $ 1,059 $ 1,108 Change in fair value included in other comprehensive income (loss) 21 (22 ) 49 (65 ) Ending Balance $ 1,108 $ 1,043 $ 1,108 $ 1,043 The Company measures certain assets at fair value on a non-recurring basis including impaired loans (excluding PCI loans), loans held for sale, and OREO. These fair value adjustments result from impairments recognized during the period, application of the lower of cost or fair value on loans held for sale, and the application of fair value less cost to sell on OREO. Assets measured at fair value on a non-recurring basis are summarized below: Fair Value Measurements at the End of the Reporting Period Using September 30, 2019 Quoted Prices Significant Significant (Dollars in thousands) Assets: Impaired loans at fair value: Real estate loans $ 10,304 $ — $ — $ 10,304 Commercial business 8,828 — — 8,828 Loans held for sale, net 25,988 — 25,988 — OREO 17,220 — — 17,220 Fair Value Measurements at the End of the Reporting Period Using December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Assets: Impaired loans at fair value: Real estate loans $ 9,379 $ — $ — $ 9,379 Commercial business 9,951 — — 9,951 Consumer 66 — — 66 OREO 5,659 — — 5,659 For assets measured at fair value on a non-recurring basis, the total net gains (losses), which include charge offs, recoveries, specific reserves, valuations, and recognized gains and losses on sales are summarized below: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2019 2018 2019 2018 (Dollars in thousands) Assets: Impaired loans at fair value: Real estate loans $ (891 ) $ (14 ) $ 682 $ (4,620 ) Commercial business 1,297 89 (2,270 ) 703 Trade Finance 333 268 — 43 Consumer (276 ) (308 ) (904 ) (834 ) Loans held for sale, net (599 ) — (599 ) — OREO 1,277 418 1,112 682 Fair Value of Financial Instruments Carrying amounts and estimated fair values of financial instruments, not previously presented, at September 30, 2019 and December 31, 2018 were as follows: September 30, 2019 Carrying Estimated Fair Value Measurement Using (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 549,356 $ 549,356 Level 1 Interest bearing deposits in other financial institutions 30,387 30,469 Level 2 Equity investments without readily determinable fair values 26,827 26,827 Level 2 Loans held for sale 29,627 29,722 Level 2 Loans receivable—net 12,010,800 11,923,715 Level 3 Accrued interest receivable 29,743 29,743 Level 2/3 Servicing assets, net 17,865 19,744 Level 3 Customers’ liabilities on acceptances 1,125 1,125 Level 2 Financial Liabilities: Noninterest bearing deposits $ 3,033,371 $ 3,033,371 Level 2 Saving and other interest bearing demand deposits 4,011,728 4,011,728 Level 2 Time deposits 5,189,651 5,217,768 Level 2 FHLB advances 625,000 629,111 Level 2 Convertible notes, net 198,211 200,124 Level 1 Subordinated debentures 102,755 115,225 Level 2 Accrued interest payable 38,197 38,197 Level 2 Acceptances outstanding 1,125 1,125 Level 2 December 31, 2018 Carrying Estimated Fair Value Measurement Using (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 459,606 $ 459,606 Level 1 Interest bearing deposits in other financial institutions 29,409 29,374 Level 2 Equity investments without readily determinable fair values 26,430 26,430 Level 2 Loans held for sale 25,128 25,943 Level 2 Loans receivable—net 12,005,558 11,913,906 Level 3 Accrued interest receivable 32,225 32,225 Level 2/3 Servicing assets, net 23,132 24,762 Level 3 Customers’ liabilities on acceptances 2,281 2,281 Level 2 Financial Liabilities: Noninterest bearing deposits $ 3,022,633 $ 3,022,633 Level 2 Saving and other interest bearing demand deposits 3,262,399 3,262,399 Level 2 Time deposits 5,870,624 5,889,030 Level 2 FHLB advances 821,280 810,812 Level 2 Convertible debt 194,543 180,525 Level 1 Subordinated debentures 101,929 116,542 Level 2 Accrued interest payable 31,374 31,374 Level 2 Acceptances outstanding 2,281 2,281 Level 2 The Company measures assets and liabilities for its fair value disclosures based on an exit price notion. Although the exit price notion represents the value that would be received to sell an asset or paid to transfer a liability, the actual price received for a sale of assets or paid to transfer liabilities could be different from exit price disclosed. The methods and assumptions used to estimate fair value are described as follows: The carrying amount is the estimated fair value for cash and cash equivalents, savings and other interest bearing demand deposits, equity investments without readily determinable fair values, customer’s and Bank’s liabilities on acceptances, noninterest bearing deposits, short-term debt, secured borrowings and variable rate loans or deposits that reprice frequently and fully. For loans the fair value is determined through a discounted cash flow analysis which incorporates probability of default and loss given default rates on an individual loan basis. The discount rate is based on the LIBOR Swap Rate for fixed rate loans, while variable loans start with the corresponding index rate and an adjustment was made on certain loans which considered factors such as servicing costs, capital charges, duration, asset type incremental costs, and use of projected cash flows. Residential real estate loans fair values included Fannie Mae and Freddie Mac prepayment speed assumptions or a third party index based on historical prepayment speeds. Fair value of time deposits is based discounted cash flow analysis using recent issuance rates over the prior three months and a market rate analysis of recent offering rates for retail products. Wholesale time deposits fair values incorporated brokered time deposit offering rates. The fair value of the Company’s debt is based on current rates for similar financing. Fair value for the Company’s convertible notes is based on the actual last traded price of the notes. The fair value of commitments to fund loans represents fees currently charged to enter into similar agreements with similar remaining maturities and is not presented herein. The fair value of these financial instruments is not material to the consolidated financial statements.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Stockholders’ Equity	Stockholders’ Equity Total stockholders’ equity at September 30, 2019 was $2.03 billion , compared to $1.90 billion at December 31, 2018 . During the second quarter of 2018, the Company recorded $21.4 million in additional paid-in capital from the convertible notes issued. The $21.4 million included $21.9 million for the equity component of the convertible notes offset by $461 thousand in issuance costs from the convertible notes that was allocated to equity. The Company also recorded a tax adjustment on the equity component of the convertible notes reducing additional paid-in capital by $6.4 million . In 2018, the Company repurchased 9,002,453 shares of its common stock totaling $150.0 million as part of the repurchase programs that were authorized by the Company’s Board of Directors in 2018. In June 2019, the Company’s Board of Directors approved another share repurchase program that authorizes the Company to repurchase up to $50.0 million of its common stock. As of September 30, 2019, the Company had no t repurchased any shares as part of this repurchase program. The Company paid a quarterly dividend of $0.14 per common share during the third quarter of 2019 compared to $0.14 per common share paid during the third quarter of 2018 . For the nine months ended September 30, 2019 and 2018 , the Company paid total dividends of $0.42 and $0.40 per common share, respectively. The following table presents the quarterly changes to accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2019 and September 30, 2018 : Three Months Ended, Nine Months Ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 (Dollars in thousands) Balance at beginning of period $ 7,423 $ (45,122 ) $ (32,705 ) $ (21,781 ) Unrealized gain (loss) on securities available for sale 14,160 (13,114 ) 71,349 (47,012 ) Reclassification adjustments for net gains realize in net income (153 ) (282 ) — Tax effect (4,157 ) 3,915 (21,089 ) 14,191 Total other comprehensive income (loss) $ 9,850 $ (9,199 ) $ 49,978 $ (32,821 ) Reclassification to retained earnings per ASU 2016-01 — — — 281 Balance at end of period $ 17,273 $ (54,321 ) $ 17,273 $ (54,321 ) During the three and nine months ended September 30, 2019, the Company recorded reclassification adjustments of $153 thousand and $282 thousand , respectively, from other comprehensive income to net gains on sales and calls of securities available for sale in the Consolidated Statements of Income for investment securities that were sold and called. During the first quarter of 2018, the Company adopted ASU 2016-01 “ Financial Instruments-Overall: Recognition and Measurement of Financial Assets and Financial Liabilities.” As a result of the adoption of ASU 2016-01, the Company no longer accounts for mutual funds as available-for-sale securities and accounts for these investments as equity investments with changes to fair value recorded through earnings. In accordance with ASU 2016-01, the Company reclassified $281 thousand in net unrealized losses included in other comprehensive income, net of taxes to retained earnings on January 1, 2018. For the three and nine months ended and September 30, 2019 and 2018 , there were no other reclassifications out of accumulated other comprehensive income (loss).

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Regulatory Matters	Regulatory Matters The Company and the Bank are subject to various regulatory capital requirements administered by the federal and state banking agencies. Failure to meet minimum capital requirements can result in certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a material and adverse effect on the Company’s and the Bank’s business, financial condition and results of operation, such as restrictions on growth or the payment of dividends or other capital distributions or management fees. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance-sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. In July 2013, the federal bank regulatory agencies adopted final regulations, which revised their risk-based and leverage capital requirements for banking organizations to meet requirements of the Dodd-Frank Act and to implement the Basel III international agreements reached by the Basel Committee. The final rules became effective for the Company and the Bank on January 1, 2015 and were subject to a phase-in period through January 1, 2019. The final rules that had an impact on the Company and the Bank include: • An increase in the minimum Tier 1 capital ratio from 4.00% to 6.00% of risk-weighted assets; • A new category and a required 4.50% of risk-weighted assets ratio was established for “Common Equity Tier 1” as a subset of Tier 1 capital limited to common equity; • A minimum non-risk-based leverage ratio was set at 4.00%, eliminating a 3.00% exception for higher rated banks; • Changes in the permitted composition of Tier 1 capital to exclude trust preferred securities, mortgage servicing rights and certain deferred tax assets and include unrealized gains and losses on available for sale debt and equity securities; • The risk-weights of certain assets for purposes of calculating the risk-based capital ratios are changed for high volatility commercial real estate acquisition, development and construction loans, certain past due non-residential mortgage loans and certain mortgage-backed and other securities exposures; and • A new additional capital conservation buffer of 2.5% of risk weighted assets over each of the required capital ratios was added and must be met to avoid limitations on the ability of the B ank to pay dividends, repurchase shares, or pay discretionary bonuses. The capital conservation buffer for the Company was initially 0.625% in 2016 and increased 0.625% annually until 2019. As of September 30, 2019 , the capital conservation buffer for the Company stood at 2.50%. As of September 30, 2019 , the ratios for the Company and the Bank were sufficient to meet the fully phased-in conservation buffer. As of September 30, 2019 and December 31, 2018 , the most recent regulatory notification categorized the Bank as “well-capitalized” under the regulatory framework for prompt corrective action. To generally be categorized as “well-capitalized”, the Bank must maintain minimum total risk-based, Tier 1 risk-based, common equity Tier 1, and Tier 1 leverage ratios as set forth in the following table. There are no conditions or events since the most recent notification from regulators that management believes has changed the institution’s category. The Company’s and the Bank’s levels and ratios are presented in the table below for the dates indicated: Actual Required Minimum Capital Adequacy With Capital Conservation Buffer Required As of September 30, 2019 Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) Common equity Tier 1 capital (to risk weighted assets): Company $ 1,540,070 11.89 % $ 582,837 4.50 % $ 906,636 7.00 % N/A N/A Bank $ 1,814,882 14.01 % $ 582,793 4.50 % $ 906,567 7.00 % $ 841,813 6.50 % Total capital (to risk-weighted assets): Company $ 1,733,442 13.38 % $ 1,036,155 8.00 % $ 1,359,953 10.50 % N/A N/A Bank $ 1,909,400 14.74 % $ 1,036,077 8.00 % $ 1,359,851 10.50 % $ 1,295,096 10.00 % Tier 1 capital Company $ 1,638,924 12.65 % $ 777,116 6.00 % $ 1,100,915 8.50 % N/A N/A Bank $ 1,814,882 14.01 % $ 777,058 6.00 % $ 906,567 8.50 % $ 1,036,077 8.00 % Tier 1 capital Company $ 1,638,924 11.18 % $ 586,610 4.00 % N/A N/A N/A N/A Bank $ 1,814,882 12.37 % $ 586,750 4.00 % N/A N/A $ 733,438 5.00 % Actual Required Minimum Capital Adequacy With Capital Conservation Buffer Required As of December 31, 2018 Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) Common equity Tier 1 capital (to risk weighted assets): Company $ 1,458,344 11.44 % $ 573,723 4.50 % $ 812,774 6.375 % N/A N/A Bank $ 1,737,092 13.63 % $ 573,669 4.50 % $ 812,740 6.375 % $ 828,677 6.50 % Total capital (to risk-weighted assets): Company $ 1,649,664 12.94 % $ 1,019,952 8.00 % $ 1,259,004 9.875 % N/A N/A Bank $ 1,830,385 14.36 % $ 1,019,910 8.00 % $ 1,258,951 9.875 % $ 1,274,887 10.00 % Tier 1 capital Company $ 1,556,371 12.21 % $ 764,964 6.00 % $ 1,004,015 7.875 % N/A N/A Bank $ 1,737,092 13.63 % $ 764,932 6.00 % $ 812,740 7.875 % $ 1,019,910 8.00 % Tier 1 capital Company $ 1,556,371 10.55 % $ 590,176 4.00 % N/A N/A N/A N/A Bank $ 1,737,092 11.76 % $ 590,639 4.00 % N/A N/A $ 738,299 5.00 %

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition On January 1, 2018, the Company adopted ASU 2014-09 “ Revenue from Contracts with Customers ” (Topic 606) and all subsequent issued ASUs that are related to Topic 606. The implementation of the new standard did not have a material impact on the measurement or recognition of revenue and a cumulative effect adjustment to opening retained earnings was not material and deemed unnecessary. Topic 606 does not apply to revenue associated with financial instruments, including revenue from loans and securities. In addition, certain noninterest income streams such as fees associated with mortgage servicing rights, financial guarantees, derivatives, and certain credit card fees are also out of scope of the new guidance. Topic 606 is applicable to noninterest revenue streams such as deposit related fees, wire transfer fees, and certain OREO related net gains or expenses. However, the recognition of these revenue streams for the Company did not change significantly upon adoption of Topic 606. Noninterest revenue streams within the scope of Topic 606 are discussed below. Service Charges on Deposit Accounts and Wire Transfer Fees Service charges on noninterest and interest bearing deposit accounts consist of monthly service charges, customer analysis charges, non-sufficient funds (“NSF”) charges, and other deposit account related charges. The Company’s performance obligation for account analysis charges and monthly service charges is generally satisfied, and the related revenue is recognized over the period in which the service is provided. NSF charges, other deposit account related charges, and wire transfer fees are transaction based, and therefore the Company’s performance obligation is satisfied at the point of the transaction, and related revenue recognized at that point in time. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers’ accounts. Service charges on deposit accounts and wire transfers are summarized below: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (Dollars in thousands) Noninterest bearing deposit account income: Monthly service charges $ 395 $ 455 $ 1,224 $ 1,340 Customer analysis charges 2,194 1,912 5,788 5,972 NSF charges 1,887 1,961 5,754 5,947 Other service charges 195 225 605 679 Total noninterest bearing deposit account income 4,671 4,553 13,371 13,938 Interest bearing deposit account income: Monthly service charges 19 16 52 45 Total service fees on deposit accounts $ 4,690 $ 4,569 $ 13,423 $ 13,983 Wire transfer fee income: Wire transfer fees $ 963 $ 1,109 $ 3,063 $ 3,338 Foreign exchange fees 95 118 395 346 Total wire transfer fees $ 1,058 $ 1,227 $ 3,458 $ 3,684 OREO Income (Expense) OREO are often sold in transactions that, under ASC 606, may not be considered a contract with a customer because the sale of the asset may not be an output of the Company’s ordinary activities. However, sales of nonfinancial assets, including in-substance nonfinancial assets, should be accounted for in accordance with ASC 610-20, “ Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets” , which requires the Company to apply certain measurement and recognition concepts of ASC 606. Accordingly, the Company recognizes the sale of a real estate property, along with any associated gain or loss, when control of the property transfers to the buyer. For sales of existing real estate properties, this generally will occur at the point of sale. When the Company finances the sale of OREO to the buyer, the Company must assess whether the buyer is committed to perform their obligations under the contract and whether collectability of the transaction price is probable. Once these criteria are met, the OREO asset is derecognized and the gain or loss on sale is recorded upon the transfer of control of the property to the buyer. Application of the new revenue recognition standard does not materially change the amount and the timing of the gain/loss on sale of OREO and other nonfinancial assets. Further, there were no open OREO/nonfinancial assets sale contracts at the adoption date that required an evaluation under Topic 606. The Company recognized a net loss on sale of OREO in the amount of $1 thousand and $14 thousand for the three and nine months ended September 30, 2019 , respectively. For the three and nine months ended September 30, 2018 , the Company recognized a gain on sale of OREO in the amount of $208 thousand and $358 thousand

Basis of Presentation Basis of

Basis of Presentation Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2019
Basis Of Presentation [Abstract]
Consolidation	The consolidated financial statements include the accounts of Hope Bancorp and its wholly owned subsidiaries, principally Bank of Hope. All intercompany transactions and balances have been eliminated in consolidation. The Company has made all adjustments, that in the opinion of management, are necessary to fairly present the Company’s financial position at September 30, 2019 and December 31, 2018 and the results of operations for the three and nine months ended September 30, 2019 and 2018 . Certain reclassifications have been made to prior period amounts to conform to the current year presentation. The results of operations for the interim periods are not necessarily indicative of results to be anticipated for the full year.
Use of estimates	The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ significantly from those estimates.
Recent Accounting Pronouncements	Pending Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”, also referred to as “CECL”. The FASB subsequently issued ASU 2018-19, ASU 2019-04, and ASU 2019-05 to provide additional clarification, implementation, codification improvements, and transition guidance related to ASU 2016-13. ASU 2016-13 requires the measurement of all expected credit losses for financial assets carried at amortized cost held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. ASU 2016-13 becomes effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2019. The Company has established a CECL committee to oversee the development and implementation of ASU 2016-13. The Company is collaborating with a third party advisory team and has also engaged a software vendor to assist the Company to consolidate its models to arrive at a lifetime expected credit losses in compliance with ASU 2016-13 by the effective date. The Company has completed the model development documentation, model validation, and parallel run process under the new methodology. The Company will continue to address any gaps from data quality, operational processes, policies, new disclosures, and controls arising from internal reviews, model validation, and subsequent parallel run to be performed during the fourth quarter of 2019. The Company is on track to adopt ASU 2016-13 on January 1, 2020 without electing the fair value option on eligible financial instruments. Upon adoption of the standard, the Company expects that based on current expectations of future economic conditions, its allowance for loan losses may increase by approximately 30% to 40% from the allowance for loan losses under the current incurred loss model with a large portion of that increase driven by longer duration CRE and consumer loans due to the capture of lifetime expected credit losses under CECL. The Company estimates that upon the adoption of CECL, the fully phased-in impact to the Company’s Tier 1 Common Equity Risk-Based Ratio to be a decline of approximately 22 to 29 basis points. The estimates of the impact of adopting CECL are still subject to change as management continues to review the key drivers and methodology assumptions. The ultimate effect of CECL on the Company’s allowance for loan losses will depend on the size and composition of the loan portfolio, the portfolio’s credit quality, economic conditions at the time of adoption, as well as any refinements to the Company’s models, methodology, and other key assumptions. At adoption, the Company will have a cumulative-effect adjustment to retained earnings resulting from the anticipated increase in the allowance for loan losses under CECL compared to its allowance for loan losses as determined under the current incurred loss model In January 2017, the FASB issued ASU 2017-04, “Intangibles: Goodwill and Other: Simplifying the Test for Goodwill Impairment.” ASU 2017-04 will amend and simplify current goodwill impairment testing to eliminate Step 2 from the current provisions. Under the new guidance, an entity should perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying value and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. An entity still has the option to perform the quantitative assessment for a reporting unit to determine if a quantitative impairment test is necessary. ASU 2017-04 should be adopted for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. The adoption of ASU 2017-04 is not expected to have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement”. ASU 2018-13 modifies the disclosure requirements for fair value measurements by removing, modifying, or adding certain disclosures. ASU 2018-13 removes the disclosure requirement detailing the amount of and reasons for transfers between Level 1 and Level 2, and the valuation processes for Level 3 fair value measurements. In addition, ASU 2018-13 modifies the disclosure requirements for investments in certain entities that calculate net asset value. Lastly, ASU 2018-13 adds a disclosure requirement for changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and the range and weighted average of significant unobservable inputs used to develop Level 3 measurements. ASU 2018-13 is effective annual periods in fiscal years beginning after December 15, 2019, including interim periods within those annual periods. Early adoption is permitted upon the issuance of ASU 2018-13. The removed and modified disclosures will be adopted on a retrospective basis, and the new disclosures will be adopted on a prospective basis. The adoption of ASU 2018-13 is not expected to have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, “ Intangibles - Goodwill and Other - Internal Use Software (Subtopic 250-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force)”. ASU 2018-15 requires an entity in a cloud computing arrangement (i.e., hosting arrangement) that is a service contract to follow the internal-use software guidance in ASC 350-40 to determine which implementation costs to capitalize as assets or expense as incurred. Capitalized implementation costs should be presented in the same line item on the balance sheet as amounts prepaid for the hosted service, if any (generally as an “other asset”). The capitalized costs will be amortized over the term of the hosting arrangement, with the amortization expense being presented in the same income statement line item as the fees paid for the hosted service. ASU 2018-15 is effective for annual reporting periods beginning after December 15, 2019, including interim periods within those annual periods. Early adoption is permitted, including adoption in any interim period. The adoption of ASU 2018-15 is not expected to have a material impact on the Company’s consolidated financial statements. In May 2019, the FASB issued ASU 2019-05, “Financial Instruments - Credit Losses, Topic 326.” ASU 2019-05 addresses certain stakeholders’ concerns by providing an option to irrevocably elect the fair value option for certain financial assets previously measured at amortized cost basis. For those entities, the targeted transition relief will increase comparability of financial statement information by providing an option to align measurement methodologies for similar financial assets. ASU 2016-13 allows companies to irrevocably elect, upon adoption of ASU 2016-13, the fair value option on financial instruments that (1) were previously recorded at amortized cost and (2) are within the scope of ASC 326-20 if the instruments are eligible for the fair value option under ASC 825-10. Entities are required to make this election on an instrument-by-instrument basis. The effective date for ASU 2019-05 is the same as for ASU 2016-13, or for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company does not expect to elect the fair value option on its financial instruments in accordance with ASU 2019-05.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Summary of Stock Option Activity Under the Plan	The following is a summary of stock option activity under the 2016 Plan and 2019 Plan for the nine months ended September 30, 2019 : Number of Shares Weighted- Average Exercise Price Per Share Weighted- Average Remaining Contractual Life (Years) Aggregate Intrinsic Value (Dollars in thousands) Outstanding - January 1, 2019 982,631 $ 15.41 Granted — — Exercised (702 ) 13.10 Expired (20,718 ) 16.37 Forfeited (18,000 ) 17.18 Outstanding - September 30, 2019 943,211 $ 15.36 5.75 $ 1,002 Options exercisable - September 30, 2019 847,211 $ 15.15 5.62 $ 1,002
Summary of Restricted and Performance Unit Activity Under the Plan	The following is a summary of restricted stock and performance unit activity under the 2016 Plan and 2019 Plan for the nine months ended September 30, 2019 : Number of Shares Weighted- Average Grant Date Fair Value Outstanding (unvested) - January 1, 2019 478,891 $ 16.37 Granted 767,653 13.18 Vested (116,947 ) 16.96 Forfeited (75,031 ) 14.71 Outstanding (unvested) - September 30, 2019 1,054,566 $ 14.10

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Computation of basic and diluted EPS	The following tables show the computation of basic and diluted EPS for the three and nine months ended September 30, 2019 and 2018 . Three Months Ended September 30, 2019 2018 Net Income (Numerator) Weighted-Average Shares (Denominator) Earnings Per Share Net Income (Numerator) Weighted-Average Shares Earnings (Dollars in thousands, except share and per share data) Basic EPS - common stock $ 42,592 126,685,921 $ 0.34 $ 46,378 130,268,992 $ 0.36 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 321,548 256,482 Diluted EPS - common stock $ 42,592 127,007,469 $ 0.34 $ 46,378 130,525,474 $ 0.36 Nine Months Ended September 30, 2019 2018 Net Income (Numerator) Weighted-Average Shares Earnings Net Income (Numerator) Weighted-Average Shares Earnings (Dollars in thousands, except share and per share data) Basic EPS - common stock $ 128,031 126,661,798 $ 1.01 $ 145,140 132,930,437 $ 1.09 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 234,172 283,632 Diluted EPS - common stock $ 128,031 126,895,970 $ 1.01 $ 145,140 133,214,069 $ 1.09

Equity Investment Securities (T

Equity Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Schedule Of Change In Fair Value For Equity Investment Securities	The change in fair value for equity investments with readily determinable fair values for the three and nine ended September 30, 2019 and 2018 were recorded in other noninterest income and fees as summarized in the table below: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (Dollars in thousands) Net change in fair value recorded during the period on equity investments with readily determinable fair value $ 168 $ (1,617 ) $ 1,393 $ 1,901 Net change in fair value recorded on equity investments sold during the period — — — — Net change in fair value on equity investments with readily determinable fair values $ 168 $ (1,617 ) $ 1,393 $ 1,901

Securities Available for Sale (

Securities Available for Sale (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Securities, Available-for-sale [Abstract]
Summary of Securities Available for Sale	The following is a summary of securities available for sale as of the dates indicated: At September 30, 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (Dollars in thousands) Debt securities: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 795,369 $ 7,714 $ (2,012 ) $ 801,071 Mortgage-backed securities: Residential 331,875 1,529 (1,281 ) 332,123 Commercial 545,282 18,769 (943 ) 563,108 Corporate securities 5,000 — (1,102 ) 3,898 Municipal securities 71,151 1,340 (369 ) 72,122 Total investment securities available for sale $ 1,748,677 $ 29,352 $ (5,707 ) $ 1,772,322 At December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (Dollars in thousands) Debt securities: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 914,710 $ 1,541 $ (21,129 ) $ 895,122 Mortgage-backed securities: Residential 415,659 47 (13,101 ) 402,605 Commercial 481,081 1,024 (12,979 ) 469,126 Corporate securities 5,000 — (1,174 ) 3,826 Municipal securities 77,168 398 (1,980 ) 75,586 Total investment securities available for sale $ 1,893,618 $ 3,010 $ (50,363 ) $ 1,846,265
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of investment securities at September 30, 2019 , by contractual maturity, is presented in the table below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations, with or without call or prepayment penalties. Collateralized mortgage obligations and mortgage-backed securities are not due at a single maturity date and their total balances are shown separately. Amortized Cost Estimated Fair Value (Dollars in thousands) Available for sale: Due within one year $ 80 $ 80 Due after one year through five years 349 351 Due after five years through ten years — — Due after ten years 75,722 75,589 U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations 795,369 801,071 Mortgage-backed securities: Residential 331,875 332,123 Commercial 545,282 563,108 Total $ 1,748,677 $ 1,772,322
Schedule of Unrealized Loss on Investments	The following tables show the Company’s investments’ gross unrealized losses and estimated fair values, aggregated by investment category and the length of time that the individual securities have been in a continuous unrealized loss position as of the dates indicated. As of September 30, 2019 Less than 12 months 12 months or longer Total Description of Securities Number Fair Value Gross Unrealized Losses Number Fair Value Gross Unrealized Losses Number of Fair Value Gross Unrealized Losses (Dollars in thousands) Collateralized mortgage obligations* 14 $ 82,505 $ (324 ) 32 $ 194,974 $ (1,688 ) 46 $ 277,479 $ (2,012 ) Mortgage-backed securities: Residential* 1 24,570 (18 ) 19 157,746 (1,263 ) 20 182,316 (1,281 ) Commercial* 4 39,882 (256 ) 5 77,481 (687 ) 9 117,363 (943 ) Corporate securities — — — 1 3,898 (1,102 ) 1 3,898 (1,102 ) Municipal securities 1 3,613 (25 ) 3 16,648 (344 ) 4 20,261 (369 ) Total 20 $ 150,570 $ (623 ) 60 $ 450,747 $ (5,084 ) 80 $ 601,317 $ (5,707 ) __________________________________ * Investments in U.S. Government agency and U.S. Government sponsored enterprises As of December 31, 2018 Less than 12 months 12 months or longer Total Description of Securities Number of Securities Fair Value Gross Unrealized Losses Number Fair Value Gross Unrealized Losses Number Fair Value Gross Unrealized Losses (Dollars in thousands) Collateralized mortgage obligations* 1 $ 8,041 $ (28 ) 93 $ 700,095 $ (21,101 ) 94 $ 708,136 $ (21,129 ) Mortgage-backed securities: Residential* 4 19,973 (37 ) 45 363,334 (13,064 ) 49 383,307 (13,101 ) Commercial* 3 38,494 (218 ) 27 312,428 (12,761 ) 30 350,922 (12,979 ) Corporate securities — — — 1 3,826 (1,174 ) 1 3,826 (1,174 ) Municipal securities 13 5,528 (83 ) 32 42,444 (1,897 ) 45 47,972 (1,980 ) Total 21 $ 72,036 $ (366 ) 198 $ 1,422,127 $ (49,997 ) 219 $ 1,494,163 $ (50,363 ) __________________________________ * Investments in U.S. Government agency and U.S. Government sponsored enterprises

Loans Receivable and Allowanc_2

Loans Receivable and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Summary of Loans Receivable by Major Category	The following is a summary of loans receivable by major category: September 30, 2019 December 31, 2018 Loan portfolio composition (Dollars in thousands) Real estate loans: Residential $ 46,919 $ 51,197 Commercial 8,235,839 8,395,327 Construction 305,185 275,076 Total real estate loans 8,587,943 8,721,600 Commercial business 2,482,817 2,127,630 Trade finance 161,019 197,190 Consumer and other 870,734 1,051,486 Total loans outstanding 12,102,513 12,097,906 Deferred loan costs, net 2,169 209 Loans receivable 12,104,682 12,098,115 Allowance for loan losses (93,882 ) (92,557 ) Loans receivable, net of allowance for loan losses $ 12,010,800 $ 12,005,558
Loans and Leases Acquired, Accretable Yield Movement Schedule	The following table presents changes in the accretable discount on PCI loans for the three and nine months ended September 30, 2019 and 2018 : Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (Dollars in thousands) Balance at beginning of period $ 43,362 $ 53,573 $ 49,697 $ 55,002 Accretion (5,234 ) (5,239 ) (17,916 ) (16,970 ) Reclassification from nonaccretable difference 1,893 7,889 8,240 18,191 Balance at end of period $ 40,021 $ 56,223 $ 40,021 $ 56,223
Allowance for Loan Losses by Portfolio Segment	The following tables detail the activity in the allowance for loan losses by portfolio segment for the three and nine months ended September 30, 2019 and 2018 : Legacy Loans Acquired Loans Total Real Estate Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Three Months Ended September 30, 2019 Balance, beginning of period $ 47,154 $ 26,757 $ 1,009 $ 6,676 $ 6,930 $ 4,598 $ — $ 942 $ 94,066 Provision (credit) for loan losses 4 2,851 (485 ) (7 ) (91 ) (80 ) — (92 ) 2,100 Loans charged off (848 ) (1,105 ) — (281 ) (349 ) (19 ) — — (2,602 ) Recoveries of charge offs 158 377 — 6 88 151 — — 780 PCI allowance adjustment — — — — — — — (462 ) (462 ) Balance, end of period $ 46,468 $ 28,880 $ 524 $ 6,394 $ 6,578 $ 4,650 $ — $ 388 $ 93,882 Nine Months Ended September 30, 2019 Balance, beginning of period $ 49,446 $ 21,826 $ 719 $ 6,269 $ 7,321 $ 5,939 $ — $ 1,037 $ 92,557 Provision (credit) for loan losses (3,459 ) 9,655 (195 ) 945 (766 ) 233 — (113 ) 6,300 Loans charged off (1,064 ) (3,187 ) — (834 ) (375 ) (896 ) — (76 ) (6,432 ) Recoveries of charge offs 1,545 586 — 14 398 252 — 2 2,797 PCI allowance adjustment — — — — — (878 ) — (462 ) (1,340 ) Balance, end of period $ 46,468 $ 28,880 $ 524 $ 6,394 $ 6,578 $ 4,650 $ — $ 388 $ 93,882 Legacy Loans Acquired Loans Total Real Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Three Months Ended September 30, 2018 Balance, beginning of period $ 48,235 $ 22,031 $ 983 $ 4,799 $ 12,816 $ 991 $ 3 $ 23 $ 89,881 Provision (credit) for loan losses 5,537 (856 ) (159 ) 1,036 1,744 28 (3 ) (27 ) 7,300 Loans charged off (5,854 ) (292 ) — (343 ) (191 ) (174 ) — (13 ) (6,867 ) Recoveries of charge offs 41 188 17 1 — 32 — 36 315 Balance, end of period $ 47,959 $ 21,071 $ 841 $ 5,493 $ 14,369 $ 877 $ — $ 19 $ 90,629 Nine Months Ended September 30, 2018 Balance, beginning of period $ 45,360 $ 17,228 $ 1,674 $ 3,385 $ 13,322 $ 3,527 $ 42 $ 3 $ 84,541 Provision (credit) for loan losses 7,792 2,920 (874 ) 2,999 1,430 (2,114 ) (42 ) (11 ) 12,100 Loans charged off (6,061 ) (1,080 ) — (919 ) (385 ) (740 ) — (13 ) (9,198 ) Recoveries of charge offs 868 2,003 41 28 2 204 — 40 3,186 Balance, end of period $ 47,959 $ 21,071 $ 841 $ 5,493 $ 14,369 $ 877 $ — $ 19 $ 90,629 The following tables break out the allowance for loan losses and the recorded investment of loans outstanding (not including accrued interest receivable and net deferred loan costs or fees) by individually impaired, general valuation, and PCI impairment, by portfolio segment at September 30, 2019 and December 31, 2018 : September 30, 2019 Legacy Loans Acquired Loans Total Real Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Allowance for loan losses: Individually evaluated for impairment $ 117 $ 2,435 $ — $ 12 $ 142 $ 941 $ — $ 1 $ 3,648 Collectively evaluated for impairment 46,351 26,445 524 6,382 1,752 387 — 17 81,858 PCI loans — — — — 4,684 3,322 — 370 8,376 Total $ 46,468 $ 28,880 $ 524 $ 6,394 $ 6,578 $ 4,650 $ — $ 388 $ 93,882 Loans outstanding: Individually evaluated for impairment $ 34,366 $ 20,592 $ — $ 2,379 $ 15,216 $ 3,914 $ — $ 797 $ 77,264 Collectively evaluated for impairment 7,272,943 2,397,490 161,019 756,102 1,164,527 53,183 — 108,130 11,913,394 PCI loans — — — — 100,891 7,638 — 3,326 111,855 Total $ 7,307,309 $ 2,418,082 $ 161,019 $ 758,481 $ 1,280,634 $ 64,735 $ — $ 112,253 $ 12,102,513 December 31, 2018 Legacy Loans Acquired Loans Total Real Commercial Business Trade Finance Consumer and Other Real Commercial Business Trade Finance Consumer and Other (Dollars in thousands) Allowance for loan losses: Individually evaluated for impairment $ 176 $ 4,221 $ — $ 3 $ 261 $ 130 $ — $ — $ 4,791 Collectively evaluated for impairment 49,270 17,605 719 6,266 1,264 460 — 19 75,603 PCI loans — — — — 5,796 5,349 — 1,018 12,163 Total $ 49,446 $ 21,826 $ 719 $ 6,269 $ 7,321 $ 5,939 $ — $ 1,037 $ 92,557 Loans outstanding: Individually evaluated for impairment $ 39,976 $ 29,624 $ 5,887 $ 441 $ 18,080 $ 5,734 $ 3,124 $ 1,141 $ 104,007 Collectively evaluated for impairment 7,037,392 1,988,067 188,179 910,292 1,507,858 80,916 — 133,942 11,846,646 PCI loans — — — — 118,294 23,289 — 5,670 147,253 Total $ 7,077,368 $ 2,017,691 $ 194,066 $ 910,733 $ 1,644,232 $ 109,939 $ 3,124 $ 140,753 $ 12,097,906
Impaired Financing Receivables	The recorded investment of individually impaired loans and the total impaired loans net of specific allowance is presented in the following table for the dates indicated: September 30, 2019 December 31, 2018 (Dollars in thousands) With allocated specific allowance Without charge off $ 30,473 $ 35,365 With charge off 3,763 681 With no allocated specific allowance Without charge off 31,884 59,607 With charge off 11,144 8,354 Specific allowance on impaired loans (3,648 ) (4,791 ) Impaired loans, net of specific allowance $ 73,616 $ 99,216 The following tables detail the recorded investment of impaired loans (Legacy Loans and Acquired Loans that became impaired subsequent to being originated and acquired, respectfully) as of September 30, 2019 and December 31, 2018 , and the average recorded investment and interest income recognized for the three and nine months ended September 30, 2019 and 2018 . Impaired loans with no related allowance are believed by management to be adequately collateralized. As of September 30, 2019 As of December 31, 2018 Total Impaired Loans (1) Recorded Investment (2) Unpaid Contractual Principal Balance Related Allowance Recorded Investment (2) Unpaid Contractual Principal Balance Related Allowance (Dollars in thousands) With related allowance: Real estate – residential $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 2,292 2,563 75 1,375 1,487 156 Hotel & motel 1,166 6,398 8 1,949 2,310 119 Gas station & car wash 61 1,967 3 — — — Mixed use 629 720 16 881 947 43 Industrial & warehouse 8,354 10,621 144 1,305 2,139 93 Other 1,098 1,819 13 7,759 8,174 26 Real estate – construction — — — — — — Commercial business 19,572 21,558 3,376 22,203 23,928 4,351 Trade finance — — — — — — Consumer and other 1,064 1,094 13 575 575 3 Subtotal $ 34,236 $ 46,740 $ 3,648 $ 36,047 $ 39,560 $ 4,791 With no related allowance: Real estate – residential $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 5,108 5,973 — 8,005 11,234 — Hotel & motel 9,790 17,841 — 10,877 22,590 — Gas station & car wash 415 938 — 545 3,653 — Mixed use 3,253 3,268 — 7,048 7,058 — Industrial & warehouse 8,744 12,519 — 12,343 13,467 — Other 8,672 13,295 — 5,969 7,122 — Real estate – construction — — — — — — Commercial business 4,934 10,310 — 13,155 17,850 — Trade finance — — — 9,011 9,011 — Consumer and other 2,112 2,198 — 1,007 1,156 — Subtotal $ 43,028 $ 66,342 $ — $ 67,960 $ 93,141 $ — Total $ 77,264 $ 113,082 $ 3,648 $ 104,007 $ 132,701 $ 4,791 __________________________________ (1) Impaired loans exclude acquired PCI loans (2) Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. For the Three Months Ended September 30, For the Nine Months Ended September 30, 2019 2018 2019 2018 Total Impaired Loans (1) Average Recorded Investment (2) Interest Income Recognized During Impairment Average Recorded Investment (2) Interest Income Recognized During Impairment Average Recorded Investment (2) Interest Income Recognized During Impairment Average Recorded Investment (2) Interest Income Recognized During Impairment (Dollars in thousands) With related allowance: Real estate – residential $ — $ — $ 125 $ — $ — $ — $ 63 $ — Real estate – commercial Retail 2,257 9 4,740 8 1,983 29 4,099 22 Hotel & motel 1,478 — 2,897 — 1,684 — 2,888 — Gas station & car wash 61 — — — 31 — — — Mixed use 733 1 3,004 40 801 4 2,320 115 Industrial & warehouse 7,631 91 1,721 6 6,039 261 1,648 22 Other 968 5 4,322 33 3,513 16 5,608 133 Real estate – construction — — — — — — — — Commercial business 20,666 173 22,159 138 22,453 545 23,381 408 Trade finance 1,413 — 2,128 2 732 — 2,678 4 Consumer and other 1,011 1 981 6 887 2 744 12 Subtotal $ 36,218 $ 280 $ 42,077 $ 233 $ 38,123 $ 857 $ 43,429 $ 716 With no related allowance: Real estate – residential $ — $ — $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 8,071 39 7,901 36 12,182 110 10,390 107 Hotel & motel 9,963 — 6,834 — 10,140 — 4,887 — Gas station & car wash 436 4 358 — 487 13 514 — Mixed use 3,363 50 3,886 49 5,247 152 2,494 149 Industrial & warehouse 10,344 52 12,209 86 10,771 155 11,364 249 Other 12,668 66 12,559 80 11,422 199 14,892 230 Real estate – construction — — — — — — 650 — Commercial business 6,780 17 20,320 129 9,810 55 19,262 360 Trade finance 1,659 — 5,785 120 5,159 — 4,503 354 Consumer and other 2,116 — 1,541 — 1,505 — 1,569 — Subtotal $ 55,400 $ 228 $ 71,393 $ 500 $ 66,723 $ 684 $ 70,525 $ 1,449 Total $ 91,618 $ 508 $ 113,470 $ 733 $ 104,846 $ 1,541 $ 113,954 $ 2,165 __________________________________ (1) Impaired loans exclude acquired PCI loans (2) Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. As of September 30, 2019 As of December 31, 2018 Impaired Acquired Loans (1) Recorded Investment (2) Unpaid Contractual Principal Balance Related Allowance Recorded Investment (2) Unpaid Contractual Principal Balance Related Allowance (Dollars in thousands) With related allowance: Real estate – residential $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 888 922 36 198 220 118 Hotel & motel 54 345 2 72 345 4 Gas station & car wash 61 1,967 3 — — — Mixed use 283 289 14 312 312 38 Industrial & warehouse 325 1,910 87 230 1,050 88 Other — — — 3,454 3,454 13 Real estate – construction — — — — — — Commercial business 3,815 4,442 941 4,064 5,041 130 Trade finance — — — — — — Consumer and other 124 — 1 144 144 — Subtotal $ 5,550 $ 9,875 $ 1,084 $ 8,474 $ 10,566 $ 391 With no related allowance: Real estate – residential $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 2,957 3,187 — 3,285 4,151 — Hotel & motel 5,261 6,687 — 5,428 6,874 — Gas station & car wash 182 705 — 247 2,673 — Mixed use — — — 3,722 3,726 — Industrial & warehouse — — — 119 894 — Other 5,205 9,306 — 1,013 1,326 — Real estate – construction — — — — — — Commercial business 99 1,041 — 1,670 2,681 — Trade finance — — — 3,124 3,124 — Consumer and other 673 139 — 997 1,144 — Subtotal $ 14,377 $ 21,065 $ — $ 19,605 $ 26,593 $ — Total $ 19,927 $ 30,940 $ 1,084 $ 28,079 $ 37,159 $ 391 __________________________________ (1) Impaired loans exclude acquired PCI loans (2) Unpaid contractual principal balance less charge offs, interest collected applied to principal if on nonaccrual and purchase discounts. For the Three Months Ended September 30, For the Nine Months Ended September 30, 2019 2018 2019 2018 Impaired Acquired Loans (1) Average Recorded Investment (2) Interest Income Recognized During Impairment Average Recorded Investment (2) Interest Income Recognized During Impairment Average Recorded Investment (2) Interest Income Recognized During Impairment Average Recorded Investment (2) Interest Income Recognized During Impairment (Dollars in thousands) With related allowance: Real estate – residential $ — $ — $ 125 $ — $ — $ — $ 63 $ — Real estate – commercial Retail 849 4 793 — 617 12 588 — Hotel & motel 63 — 73 — 68 — 79 — Gas station & car wash 61 — — — 31 — — — Mixed use 288 1 2,833 40 298 4 2,189 115 Industrial & warehouse 326 — 258 — 279 — 250 1 Other — — 788 3 999 — 1,802 10 Real estate – construction — — — — — — — — Commercial business 2,918 53 4,506 41 3,469 166 5,709 121 Trade finance — — — — — — — — Consumer and other 128 — 150 2 134 — 75 4 Subtotal $ 4,633 $ 58 $ 9,526 $ 86 $ 5,895 $ 182 $ 10,755 $ 251 With no related allowance: Real estate – residential $ — $ — $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 5,056 34 3,008 31 5,233 94 3,181 92 Hotel & motel 5,306 — 3,516 — 5,358 — 2,000 — Gas station & car wash 183 — 218 — 214 — 159 — Mixed use 97 — 36 — 1,955 — 56 — Industrial & warehouse — — 119 — 53 — 287 — Other 5,168 66 4,364 63 3,929 199 5,574 181 Real estate – construction — — — — — — — — Commercial business 1,153 — 6,894 27 1,262 — 5,405 65 Trade finance 1,659 — 3,097 48 2,377 — 3,136 138 Consumer and other 676 — 1,531 — 783 — 1,373 — Subtotal $ 19,298 $ 100 $ 22,783 $ 169 $ 21,164 $ 293 $ 21,171 $ 476 Total $ 23,931 $ 158 $ 32,309 $ 255 $ 27,059 $ 475 $ 31,926 $ 727 __________________________________
Aging of Past Due Loans	The following tables present the recorded investment of past due loans, including nonaccrual loans past due 30 or more days, by the number of days past due as of September 30, 2019 and December 31, 2018 by class of loans: As of September 30, 2019 As of December 31, 2018 30-59 Days Past Due 60-89 Days Past Due 90 or More Days Past Due Total Past Due 30-59 Days 60-89 Days 90 or More Days Past Due Total (Dollars in thousands) Legacy Loans: Real estate – residential $ — $ — $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 1,238 — 1,107 2,345 733 — 809 1,542 Hotel & motel 945 334 2,120 3,399 153 — 5,215 5,368 Gas station & car wash 921 1,812 — 2,733 — — 31 31 Mixed use 169 634 — 803 — — — — Industrial & warehouse — 952 3,759 4,711 1,465 — 1,922 3,387 Other 3,334 — 2,363 5,697 1,837 — 2,405 4,242 Real estate – construction — — — — — — — — Commercial business 1,599 428 3,917 5,944 5,500 435 7,003 12,938 Trade finance 50 — — 50 1,036 — 1,661 2,697 Consumer and other 6,551 370 1,960 8,881 16,413 140 247 16,800 Subtotal $ 14,807 $ 4,530 $ 15,226 $ 34,563 $ 27,137 $ 575 $ 19,293 $ 47,005 Acquired Loans: (1) Real estate – residential $ — $ — $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 96 — 620 716 347 — 602 949 Hotel & motel 411 — 3,973 4,384 — — 5,206 5,206 Gas station & car wash — — 221 221 154 — 221 375 Mixed use — — — — 107 — 1,034 1,141 Industrial & warehouse 625 75 93 793 142 — 119 261 Other — — 297 297 183 219 — 402 Real estate – construction 10,165 — — 10,165 — — — — Commercial business 266 17 140 423 397 613 253 1,263 Trade finance — — — — — — — — Consumer and other 117 280 268 665 — — 334 334 Subtotal $ 11,680 $ 372 $ 5,612 $ 17,664 $ 1,330 $ 832 $ 7,769 $ 9,931 Total Past Due $ 26,487 $ 4,902 $ 20,838 $ 52,227 $ 28,467 $ 1,407 $ 27,062 $ 56,936 __________________________________ (1) Acquired Loans exclude PCI loans. The following table represents the recorded investment of nonaccrual loans and loans past due 90 or more days and still on accrual status by class of loans as of September 30, 2019 and December 31, 2018 . Nonaccrual Loans (1) Accruing Loans Past Due 90 or More Days September 30, 2019 December 31, 2018 September 30, 2019 December 31, 2018 (Dollars in thousands) Legacy Loans: Real estate – residential $ — $ — $ — $ — Real estate – commercial Retail 2,956 5,153 — — Hotel & motel 5,641 7,325 — — Gas station & car wash — 31 — — Mixed use 516 749 — — Industrial & warehouse 6,325 6,111 — — Other 4,226 5,940 — — Real estate – construction — — — — Commercial business 10,469 14,837 — — Trade finance — 1,661 — — Consumer and other 2,276 441 398 243 Subtotal $ 32,409 $ 42,248 $ 398 $ 243 Acquired Loans: (2) Real estate – residential $ — $ — $ — $ — Real estate – commercial Retail 920 829 — — Hotel & motel 5,315 5,500 — 1,286 Gas station & car wash 243 247 — — Mixed use 167 1,224 — — Industrial & warehouse 325 349 — — Other 1,286 259 — — Real estate – construction — — — — Commercial business 773 1,632 — — Trade finance — — — — Consumer and other 797 998 — — Subtotal $ 9,826 $ 11,038 $ — $ 1,286 Total $ 42,235 $ 53,286 $ 398 $ 1,529 __________________________________ (1) Total nonaccrual loans exclude guaranteed portion of delinquent SBA loans that are in liquidation totaling $37.3 million and $29.2 million , at September 30, 2019 and December 31, 2018 , respectively. (2) Acquired Loans exclude PCI loans.
Risk Category of Loans by Class of Loans	The following tables present the recorded investment of risk ratings for Legacy and Acquired Loans as of September 30, 2019 and December 31, 2018 by class of loans: As of September 30, 2019 Pass/ Not Rated Special Mention Substandard Doubtful Total (Dollars in thousands) Legacy Loans: Real estate – residential $ 42,148 $ — $ 144 $ — $ 42,292 Real estate – commercial Retail 1,863,725 28,749 34,341 — 1,926,815 Hotel & motel 1,412,952 419 30,527 — 1,443,898 Gas station & car wash 790,464 3,858 4,588 — 798,910 Mixed use 575,998 1,496 9,180 — 586,674 Industrial & warehouse 752,813 1,459 34,685 — 788,957 Other 1,370,768 21,218 32,757 — 1,424,743 Real estate – construction 278,109 9,880 7,031 — 295,020 Commercial business 2,354,480 34,643 28,942 17 2,418,082 Trade finance 161,019 — — — 161,019 Consumer and other 755,988 170 2,323 — 758,481 Subtotal $ 10,358,464 $ 101,892 $ 184,518 $ 17 $ 10,644,891 Acquired Loans: Real estate – residential $ 3,919 $ 385 $ 323 $ — $ 4,627 Real estate – commercial Retail 348,739 6,489 12,650 — 367,878 Hotel & motel 151,908 159 11,766 — 163,833 Gas station & car wash 114,550 — 4,379 — 118,929 Mixed use 79,384 7,154 4,260 — 90,798 Industrial & warehouse 145,147 4,404 10,829 — 160,380 Other 331,772 8,564 23,688 — 364,024 Real estate – construction — 10,165 — — 10,165 Commercial business 50,333 623 13,779 — 64,735 Trade finance — — — — — Consumer and other 109,827 13 2,413 — 112,253 Subtotal $ 1,335,579 $ 37,956 $ 84,087 $ — $ 1,457,622 Total $ 11,694,043 $ 139,848 $ 268,605 $ 17 $ 12,102,513 As of December 31, 2018 Pass/ Special Mention Substandard Doubtful Total (Dollars in thousands) Legacy Loans: Real estate – residential $ 44,066 $ — $ 546 $ — $ 44,612 Real estate – commercial Retail 1,815,170 18,072 30,686 — 1,863,928 Hotel & motel 1,389,349 21,932 15,869 — 1,427,150 Gas station & car wash 814,291 2,810 2,464 — 819,565 Mixed use 510,021 12,480 13,292 — 535,793 Industrial & warehouse 711,236 1,665 38,332 — 751,233 Other 1,326,795 35,539 34,618 — 1,396,952 Real estate – construction 227,231 10,904 — — 238,135 Commercial business 1,944,783 18,220 54,688 — 2,017,691 Trade finance 191,508 — 2,558 — 194,066 Consumer and other 910,292 — 441 — 910,733 Subtotal $ 9,884,742 $ 121,622 $ 193,494 $ — $ 10,199,858 Acquired Loans: Real estate – residential $ 5,812 $ 393 $ 380 $ — $ 6,585 Real estate – commercial Retail 483,939 4,651 17,332 35 505,957 Hotel & motel 186,761 807 19,472 — 207,040 Gas station & car wash 148,702 274 6,032 — 155,008 Mixed use 77,100 3,986 8,151 — 89,237 Industrial & warehouse 171,574 9,451 18,071 223 199,319 Other 402,247 12,902 28,996 — 444,145 Real estate – construction 29,058 7,883 — — 36,941 Commercial business 89,611 1,083 19,237 8 109,939 Trade finance — — 3,124 — 3,124 Consumer and other 136,944 37 3,626 146 140,753 Subtotal $ 1,731,748 $ 41,467 $ 124,421 $ 412 $ 1,898,048 Total $ 11,616,490 $ 163,089 $ 317,915 $ 412 $ 12,097,906
Loans Sold From Loans Held For Investment	The breakdown of loans by type that were reclassified from held for investment to held for sale for the three and nine months ended September 30, 2019 and 2018 is presented in the following table: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Transfer of loans held for investment to held for sale (Dollars in thousands) Real estate - commercial $ 25,988 $ — $ 25,988 $ — Consumer — 525 82,991 6,680 Total $ 25,988 $ 525 $ 108,979 $ 6,680
Allowance for Loan Losses and Impaired Loans, Qualitative and Quantitative Analysis	The following table presents breakdown of loans by impairment method at September 30, 2019 and December 31, 2018 : As of September 30, 2019 Real Estate – Residential Real Estate – Commercial Real Estate – Construction Commercial Business Trade Finance Consumer and Other Total (Dollars in thousands) Impaired loans (recorded investment) $ — $ 49,582 $ — $ 24,506 $ — $ 3,176 $ 77,264 Specific allowance $ — $ 259 $ — $ 3,376 $ — $ 13 $ 3,648 Specific allowance to impaired loans N/A 0.52 % N/A 13.78 % N/A 0.41 % 4.72 % Other loans $ 46,919 $ 8,186,257 $ 305,185 $ 2,458,311 $ 161,019 $ 867,558 $ 12,025,249 General allowance $ 81 $ 51,077 $ 1,629 $ 30,154 $ 524 $ 6,769 $ 90,234 General allowance to other loans 0.17 % 0.62 % 0.53 % 1.23 % 0.33 % 0.78 % 0.75 % Total loans $ 46,919 $ 8,235,839 $ 305,185 $ 2,482,817 $ 161,019 $ 870,734 $ 12,102,513 Total allowance for loan losses $ 81 $ 51,336 $ 1,629 $ 33,530 $ 524 $ 6,782 $ 93,882 Total allowance to total loans 0.17 % 0.62 % 0.53 % 1.35 % 0.33 % 0.78 % 0.78 % As of December 31, 2018 Real Estate – Residential Real Estate – Commercial Real Estate – Construction Commercial Business Trade Finance Consumer and Other Total (Dollars in thousands) Impaired loans (recorded investment) $ — $ 58,056 $ — $ 35,358 $ 9,011 $ 1,582 $ 104,007 Specific allowance $ — $ 437 $ — $ 4,351 $ — $ 3 $ 4,791 Specific allowance to impaired loans N/A 0.75 % N/A 12.31 % — % 0.19 % 4.61 % Other loans $ 51,197 $ 8,337,271 $ 275,076 $ 2,092,272 $ 188,179 $ 1,049,904 $ 11,993,899 General allowance $ 112 $ 55,453 $ 765 $ 23,414 $ 719 $ 7,303 $ 87,766 General allowance to other loans 0.22 % 0.67 % 0.28 % 1.12 % 0.38 % 0.70 % 0.73 % Total loans $ 51,197 $ 8,395,327 $ 275,076 $ 2,127,630 $ 197,190 $ 1,051,486 $ 12,097,906 Total allowance for loan losses $ 112 $ 55,890 $ 765 $ 27,765 $ 719 $ 7,306 $ 92,557 Total allowance to total loans 0.22 % 0.67 % 0.28 % 1.30 % 0.36 % 0.69 % 0.77 %
Troubled Debt Restructurings	The following tables present the recorded investment of loans classified as TDR during the three and nine months ended September 30, 2019 and 2018 by class of loans: Three Months Ended September 30, 2019 Three Months Ended September 30, 2018 Number of Pre- Post- Number of Loans Pre- Modification Post- Modification (Dollars in thousands) Legacy Loans: Real estate – residential — $ — $ — — $ — $ — Real estate – commercial Retail — — — — — — Hotel & motel 1 574 574 — — — Gas station & car wash — — — — — — Mixed use — — — — — — Industrial & warehouse — — — — — — Other — — — — — — Real estate – construction — — — — — — Commercial business 2 169 169 5 4,497 4,497 Trade finance — — — 1 898 898 Consumer and other — — — — — — Subtotal 3 $ 743 $ 743 6 $ 5,395 $ 5,395 Acquired Loans: Real estate – residential — $ — $ — — $ — $ — Real estate – commercial Retail 1 328 328 — — — Hotel & motel — — — 1 73 73 Gas station & car wash — — — — — — Mixed use — — — — — — Industrial & warehouse — — — 1 237 237 Other — — — — — — Real estate – construction — — — — — — Commercial business — — — 3 383 383 Trade finance — — — — — — Consumer and other — — — — — — Subtotal 1 $ 328 $ 328 5 $ 693 $ 693 Total 4 $ 1,071 $ 1,071 11 $ 6,088 $ 6,088 Nine Months Ended September 30, 2019 Nine Months Ended September 30, 2018 Number of Pre- Post- Number of Loans Pre- Modification Post- Modification (Dollars in thousands) Legacy Loans: Real estate – residential — $ — $ — — $ — $ — Real estate – commercial Retail — — — 2 54 54 Hotel & motel 3 1,439 1,439 — — — Gas station & car wash — — — — — — Mixed use — — — — — — Industrial & warehouse — — — 1 2,078 2,078 Other 1 101 101 1 1,226 1,226 Real estate – construction — — — — — — Commercial business 13 2,868 2,868 17 10,727 10,727 Trade finance — — — 1 898 898 Consumer and other 10 55 55 1 67 67 Subtotal 27 $ 4,463 $ 4,463 23 $ 15,050 $ 15,050 Acquired Loans: Real estate – residential — $ — $ — — $ — $ — Real estate – commercial Retail 3 449 449 — — — Hotel & motel — — — 1 73 73 Gas station & car wash — — — — — — Mixed use — — — 1 2,704 2,704 Industrial & warehouse — — — 1 237 237 Other 2 954 954 — — — Real estate – construction — — — — — — Commercial business 1 131 131 5 1,647 1,647 Trade finance — — — — — — Consumer and other — — — — — — Subtotal 6 $ 1,534 $ 1,534 8 $ 4,661 $ 4,661 Total 33 $ 5,997 $ 5,997 31 $ 19,711 $ 19,711 A summary of the recorded investment of TDR loans on accrual and nonaccrual status by type of concession as of September 30, 2019 and December 31, 2018 is presented below: As of September 30, 2019 TDR Loans on Accrual Status TDR Loans on Nonaccrual Status Total TDRs Real Estate Commercial Business Other Total Real Estate Commercial Business Other Total (Dollars in thousands) Payment concession $ 4,984 $ 999 $ 46 $ 6,029 $ 4,504 $ 294 $ — $ 4,798 $ 10,827 Maturity / amortization concession 11,861 10,024 47 21,932 — 6,115 124 6,239 28,171 Rate concession 4,515 2,241 — 6,756 353 69 — 422 7,178 Total $ 21,360 $ 13,264 $ 93 $ 34,717 $ 4,857 $ 6,478 $ 124 $ 11,459 $ 46,176 As of December 31, 2018 TDR Loans on Accrual Status TDR Loans on Nonaccrual Status Total TDRs Real Estate Commercial Business Other Total Real Estate Commercial Business Other Total (Dollars in thousands) Payment concession $ 5,142 $ 961 $ — $ 6,103 $ 2,216 $ 746 $ — $ 2,962 $ 9,065 Maturity / amortization concession 14,012 17,257 7,391 38,660 — 10,166 73 10,239 48,899 Rate concession 4,872 672 103 5,647 401 — — 401 6,048 Total $ 24,026 $ 18,890 $ 7,494 $ 50,410 $ 2,617 $ 10,912 $ 73 $ 13,602 $ 64,012
Summary of Troubled Debt Restructurings with Subsequent Payment Default	The following table presents loans modified as TDRs within the previous twelve months ended September 30, 2019 and September 30, 2018 that subsequently had payment defaults during the three and nine months ended September 30, 2019 and September 30, 2018 : Three Months Ended September 30, 2019 Three Months Ended September 30, 2018 Number of Loans Balance Number of Loans Balance (Dollars in thousands) Legacy Loans: Real estate – commercial Retail — $ — — $ — Hotel & motel — — 1 1,019 Gas station & car wash — — — — Mixed Use — — — — Industrial & warehouse — — — — Other 1 101 1 1,226 Real estate – construction — — — — Commercial business 1 27 — — Trade finance — — — — Consumer and other 8 37 — — Subtotal 10 $ 165 2 $ 2,245 Acquired Loans: Real estate – commercial Retail 1 $ 96 — $ — Hotel & motel — — — — Gas station & car wash — — — — Mixed Use — — — — Industrial & warehouse — — — — Other — — — — Real estate – construction — — — — Commercial business 1 4 — — Trade finance — — — — Consumer and other — — — — Subtotal 2 $ 100 — $ — Total 12 $ 265 2 $ 2,245 Nine Months Ended September 30, 2019 Nine Months Ended September 30, 2018 Number of Loans Balance Number of Loans Balance (Dollars in thousands) Legacy Loans: Real estate – commercial Retail — $ — — $ — Hotel & motel — — 1 53 Gas station & car wash — — 1 1,019 Mixed Use — — — — Industrial & warehouse — — — — Other 1 101 1 1,226 Real estate – construction — — — — Commercial business 1 27 1 200 Trade finance — — — — Consumer and other 11 42 — — Subtotal 13 $ 170 4 $ 2,498 Acquired Loans: Real estate – commercial Retail 1 $ 96 — $ — Hotel & motel — — — — Gas station & car wash — — — — Mixed Use — — — — Industrial & warehouse — — — — Other — — — — Real estate – construction — — — — Commercial business 2 4 — — Trade finance — — — — Consumer and other — — — — Subtotal 3 $ 100 — $ — Total 16 $ 270 4 $ 2,498

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Summary of Net Lease Cost and Other Information	The table below summarizes other information related to the Company’s operating leases: At or for the Three Months Ended At or for the Nine Months Ended (Dollars in thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash outflows for operating leases $ 3,649 $ 11,021 Right-of-use assets obtained in exchange for lease liabilities, net — 65,263 Weighted-average remaining lease term - operating leases 6.01 years 6.01 years Weighted-average discount rate - operating leases 3.11 % 3.11 % The table below summarizes the Company’s net lease cost: Three Months Ended Nine Months Ended (Dollars in thousands) Operating lease cost $ 3,850 $ 12,130 Short term lease cost — 9 Variable lease cost 875 2,411 Sublease income (157 ) (470 ) Net lease cost $ 4,568 $ 14,080
Summary of Maturity of Remaining Lease Liabilities	The table below summarizes the maturity of remaining lease liabilities: September 30, 2019 (Dollars in thousands) 2019 $ 3,667 2020 14,200 2021 13,496 2022 9,420 2023 7,352 2024 and thereafter 20,804 Total lease payments 68,939 Less: imputed interest 6,441 Total lease obligations $ 62,498

Borrowings (Tables)

Borrowings (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Contractual Maturities for FHLB-SF Borrowings	At September 30, 2019 , the contractual maturities for outstanding FHLB advances were as follows: September 30, 2019 Scheduled maturities in: (Dollars in thousands) 2019 $ 150,000 2020 185,000 2021 145,000 2022 145,000 Total $ 625,000

Subordinated Debentures and C_2

Subordinated Debentures and Convertible Notes (Tables)	9 Months Ended
	Sep. 30, 2019
Subordinated Borrowings [Abstract]
Summary of Trust Preferred Securities and Debentures	The following table is a summary of trust preferred securities and Debentures at September 30, 2019 : Issuance Trust Issuance Date Trust Preferred Security Amount Carrying Rate Type Current Rate Maturity Date (Dollars in thousands) Nara Capital Trust III 06/05/2003 $ 5,000 $ 5,155 Variable 5.27% 06/15/2033 Nara Statutory Trust IV 12/22/2003 5,000 5,155 Variable 5.15% 01/07/2034 Nara Statutory Trust V 12/17/2003 10,000 10,310 Variable 5.09% 12/17/2033 Nara Statutory Trust VI 03/22/2007 8,000 8,248 Variable 3.77% 06/15/2037 Center Capital Trust I 12/30/2003 18,000 14,182 Variable 5.15% 01/07/2034 Wilshire Trust II 03/17/2005 20,000 15,688 Variable 3.93% 03/17/2035 Wilshire Trust III 09/15/2005 15,000 11,087 Variable 3.52% 09/15/2035 Wilshire Trust IV 07/10/2007 25,000 17,970 Variable 3.50% 09/15/2037 Saehan Capital Trust I 03/30/2007 20,000 14,960 Variable 3.72% 06/30/2037 Total $ 126,000 $ 102,755
Convertible Debt	The value of the convertible note at issuance and carrying value as of September 30, 2019 and December 31, 2018 is presented in the tables below: As of September 30, 2019 Amortization/ Capitalization Period Gross Accumulated Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 217,500 $ — $ 217,500 Discount 5 years (21,880 ) 5,614 (16,266 ) Issuance costs to be capitalized 5 years (4,119 ) 1,096 (3,023 ) Carrying balance of convertible notes $ 191,501 $ 6,710 $ 198,211 As of December 31, 2018 Amortization/ Capitalization Period Gross Accumulated Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 217,500 $ — $ 217,500 Discount 5 years (21,880 ) 2,544 (19,336 ) Issuance costs to be capitalized 5 years (4,119 ) 498 (3,621 ) Carrying balance of convertible notes $ 191,501 $ 3,042 $ 194,543

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location	At September 30, 2019 and December 31, 2018 , interest rate swaps related to the Company’s loan hedging program that were outstanding is presented in the following table: September 30, 2019 December 31, 2018 (Dollars in thousands) Interest rate swaps on loans with correspondent banks Notional amount $ 16,663 $ 237,916 Weighted average remaining term (years) 3.2 6.8 Pay fixed rate (weighted average) 3.91 % 4.36 % Received variable rate (weighted average) 4.62 % 4.69 % Estimated fair value $ 35 $ 6,191 Interest rate swaps on loans with correspondent banks Notional amount $ 360,113 $ 36,972 Weighted average remaining term (years) 7.0 6.4 Pay fixed rate (weighted average) 4.28 % 5.12 % Received variable rate (weighted average) 4.26 % 4.56 % Estimated fair value $ (14,558 ) $ (868 ) Back to back interest rate swaps with loan customers Notional amount $ 16,663 $ 237,916 Weighted average remaining term (years) 3.2 6.8 Received fixed rate (weighted average) 3.91 % 4.36 % Pay variable rate (weighted average) 4.62 % 4.69 % Estimated fair value $ (35 ) $ (6,191 ) Back to back interest rate swaps with loan customers Notional amount $ 360,113 $ 36,972 Weighted average remaining term (years) 7.0 6.4 Received fixed rate (weighted average) 4.28 % 5.12 % Pay variable rate (weighted average) 4.26 % 4.56 % Estimated fair value $ 14,558 $ 868
Schedule of Derivative Instruments	The following table reflects the notional amount and fair value of mortgage banking derivatives for the dates indicated: As of September 30, 2019 As of December 31, 2018 Notional Amount Fair Value Notional Amount Fair Value (Dollars in thousands) Assets: Interest rate lock commitments $ 7,010 $ 48 $ 874 $ 10 Forward sale contracts related to mortgage banking $ 4,785 $ 23 $ — $ — Liabilities: Interest rate lock commitments $ 658 $ (3 ) $ — $ — Forward sale contracts related to mortgage banking $ 2,883 $ (4 ) $ 874 $ 3

Commitments and contingencies (

Commitments and contingencies (Tables)	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments	Commitments at September 30, 2019 and December 31, 2018 are summarized as follows: September 30, 2019 December 31, 2018 (Dollars in thousands) Commitments to extend credit $ 1,743,145 $ 1,712,032 Standby letters of credit 111,665 69,763 Other letters of credit 39,166 65,822 Commitments to fund investments in affordable housing partnerships 32,635 46,507

Goodwill, Intangible Assets, _2

Goodwill, Intangible Assets, and Servicing Assets (Tables)	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	The following table provides information regarding the core deposit intangibles at September 30, 2019 and December 31, 2018 : As of September 30, 2019 As of December 31, 2018 Core Deposit Intangibles Related To: Amortization Period Gross Amount Accumulated Amortization Carrying Amount Accumulated Carrying Amount (Dollars in thousands) Center Financial acquisition 7 years $ 4,100 $ (4,100 ) $ — $ (4,100 ) $ — Pacific International Bank acquisition 7 years 604 (597 ) 7 (579 ) 25 Foster Bankshares acquisition 10 years 2,763 (2,063 ) 700 (1,893 ) 870 Wilshire Bancorp acquisition 10 years 18,138 (6,455 ) 11,683 (4,972 ) 13,166 Total $ 25,605 $ (13,215 ) $ 12,390 $ (11,544 ) $ 14,061
Schedule of Servicing Assets	The changes in servicing assets for the three and nine months ended September 30, 2019 and 2018 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (Dollars in thousands) Balance at beginning of period $ 19,997 $ 25,050 $ 23,132 $ 24,710 Additions through originations of servicing assets 437 1,503 1,383 4,819 Amortization (2,569 ) (2,199 ) (6,650 ) (5,845 ) Adjustments — — — 670 Balance at end of period $ 17,865 $ 24,354 $ 17,865 $ 24,354
Summary of Fair Value Inputs	The inputs used in evaluating servicing assets for impairment at September 30, 2019 and December 31, 2018 are presented below. September 30, 2019 December 31, 2018 SBA Servicing Assets: Weighted-average discount rate 10.52% 11.23% Constant prepayment rate 14.02% 11.09% Mortgage Servicing Assets: Weighted-average discount rate 9.13% 10.25% Constant prepayment rate 9.78% 7.13%

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	Assets and liabilities measured at fair value on a recurring basis are summarized below: Fair Value Measurements at the End of September 30, 2019 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Assets: Securities available for sale: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 801,071 $ — $ 801,071 $ — Mortgage-backed securities: Residential 332,123 — 332,123 — Commercial 563,108 — 563,108 — Corporate securities 3,898 — 3,898 — Municipal securities 72,122 — 71,014 1,108 Equity investments with readily determinable fair value 22,228 22,228 — — Interest rate swaps 14,593 — 14,593 — Mortgage banking derivatives 71 — 71 — Liabilities: Interest rate swaps 14,593 — 14,593 — Mortgage banking derivatives 7 — 7 — Fair Value Measurements at the End of the Reporting Period Using December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Assets: Securities available for sale: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 895,122 $ — $ 895,122 $ — Mortgage-backed securities: Residential 402,605 — 402,605 — Commercial 469,126 — 469,126 — Corporate securities 3,826 — 3,826 — Municipal securities 75,586 — 74,527 1,059 Equity investments with readily determinable fair value 23,405 23,405 — — Interest rate swaps 7,059 — 7,059 — Mortgage banking derivatives 10 — 10 — Liabilities: Interest rate swaps 7,059 — 7,059 — Mortgage banking derivatives 3 — 3 —
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The table below presents a reconciliation and income statement classification of gains (losses) for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and nine months ended September 30, 2019 and 2018 : Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (Dollars in thousands) Beginning Balance $ 1,087 $ 1,065 $ 1,059 $ 1,108 Change in fair value included in other comprehensive income (loss) 21 (22 ) 49 (65 ) Ending Balance $ 1,108 $ 1,043 $ 1,108 $ 1,043
Assets Measured at Fair Value on a Non-recurring Basis	Assets measured at fair value on a non-recurring basis are summarized below: Fair Value Measurements at the End of the Reporting Period Using September 30, 2019 Quoted Prices Significant Significant (Dollars in thousands) Assets: Impaired loans at fair value: Real estate loans $ 10,304 $ — $ — $ 10,304 Commercial business 8,828 — — 8,828 Loans held for sale, net 25,988 — 25,988 — OREO 17,220 — — 17,220 Fair Value Measurements at the End of the Reporting Period Using December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Assets: Impaired loans at fair value: Real estate loans $ 9,379 $ — $ — $ 9,379 Commercial business 9,951 — — 9,951 Consumer 66 — — 66 OREO 5,659 — — 5,659 For assets measured at fair value on a non-recurring basis, the total net gains (losses), which include charge offs, recoveries, specific reserves, valuations, and recognized gains and losses on sales are summarized below: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2019 2018 2019 2018 (Dollars in thousands) Assets: Impaired loans at fair value: Real estate loans $ (891 ) $ (14 ) $ 682 $ (4,620 ) Commercial business 1,297 89 (2,270 ) 703 Trade Finance 333 268 — 43 Consumer (276 ) (308 ) (904 ) (834 ) Loans held for sale, net (599 ) — (599 ) — OREO 1,277 418 1,112 682
Carrying Amounts and Estimated Fair Values of Financial Instruments	Carrying amounts and estimated fair values of financial instruments, not previously presented, at September 30, 2019 and December 31, 2018 were as follows: September 30, 2019 Carrying Estimated Fair Value Measurement Using (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 549,356 $ 549,356 Level 1 Interest bearing deposits in other financial institutions 30,387 30,469 Level 2 Equity investments without readily determinable fair values 26,827 26,827 Level 2 Loans held for sale 29,627 29,722 Level 2 Loans receivable—net 12,010,800 11,923,715 Level 3 Accrued interest receivable 29,743 29,743 Level 2/3 Servicing assets, net 17,865 19,744 Level 3 Customers’ liabilities on acceptances 1,125 1,125 Level 2 Financial Liabilities: Noninterest bearing deposits $ 3,033,371 $ 3,033,371 Level 2 Saving and other interest bearing demand deposits 4,011,728 4,011,728 Level 2 Time deposits 5,189,651 5,217,768 Level 2 FHLB advances 625,000 629,111 Level 2 Convertible notes, net 198,211 200,124 Level 1 Subordinated debentures 102,755 115,225 Level 2 Accrued interest payable 38,197 38,197 Level 2 Acceptances outstanding 1,125 1,125 Level 2 December 31, 2018 Carrying Estimated Fair Value Measurement Using (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 459,606 $ 459,606 Level 1 Interest bearing deposits in other financial institutions 29,409 29,374 Level 2 Equity investments without readily determinable fair values 26,430 26,430 Level 2 Loans held for sale 25,128 25,943 Level 2 Loans receivable—net 12,005,558 11,913,906 Level 3 Accrued interest receivable 32,225 32,225 Level 2/3 Servicing assets, net 23,132 24,762 Level 3 Customers’ liabilities on acceptances 2,281 2,281 Level 2 Financial Liabilities: Noninterest bearing deposits $ 3,022,633 $ 3,022,633 Level 2 Saving and other interest bearing demand deposits 3,262,399 3,262,399 Level 2 Time deposits 5,870,624 5,889,030 Level 2 FHLB advances 821,280 810,812 Level 2 Convertible debt 194,543 180,525 Level 1 Subordinated debentures 101,929 116,542 Level 2 Accrued interest payable 31,374 31,374 Level 2 Acceptances outstanding 2,281 2,281 Level 2

Stockholders_ Equity (Tables)

Stockholders’ Equity (Tables)	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents the quarterly changes to accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2019 and September 30, 2018 : Three Months Ended, Nine Months Ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 (Dollars in thousands) Balance at beginning of period $ 7,423 $ (45,122 ) $ (32,705 ) $ (21,781 ) Unrealized gain (loss) on securities available for sale 14,160 (13,114 ) 71,349 (47,012 ) Reclassification adjustments for net gains realize in net income (153 ) (282 ) — Tax effect (4,157 ) 3,915 (21,089 ) 14,191 Total other comprehensive income (loss) $ 9,850 $ (9,199 ) $ 49,978 $ (32,821 ) Reclassification to retained earnings per ASU 2016-01 — — — 281 Balance at end of period $ 17,273 $ (54,321 ) $ 17,273 $ (54,321 )

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	The Company’s and the Bank’s levels and ratios are presented in the table below for the dates indicated: Actual Required Minimum Capital Adequacy With Capital Conservation Buffer Required As of September 30, 2019 Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) Common equity Tier 1 capital (to risk weighted assets): Company $ 1,540,070 11.89 % $ 582,837 4.50 % $ 906,636 7.00 % N/A N/A Bank $ 1,814,882 14.01 % $ 582,793 4.50 % $ 906,567 7.00 % $ 841,813 6.50 % Total capital (to risk-weighted assets): Company $ 1,733,442 13.38 % $ 1,036,155 8.00 % $ 1,359,953 10.50 % N/A N/A Bank $ 1,909,400 14.74 % $ 1,036,077 8.00 % $ 1,359,851 10.50 % $ 1,295,096 10.00 % Tier 1 capital Company $ 1,638,924 12.65 % $ 777,116 6.00 % $ 1,100,915 8.50 % N/A N/A Bank $ 1,814,882 14.01 % $ 777,058 6.00 % $ 906,567 8.50 % $ 1,036,077 8.00 % Tier 1 capital Company $ 1,638,924 11.18 % $ 586,610 4.00 % N/A N/A N/A N/A Bank $ 1,814,882 12.37 % $ 586,750 4.00 % N/A N/A $ 733,438 5.00 % Actual Required Minimum Capital Adequacy With Capital Conservation Buffer Required As of December 31, 2018 Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) Common equity Tier 1 capital (to risk weighted assets): Company $ 1,458,344 11.44 % $ 573,723 4.50 % $ 812,774 6.375 % N/A N/A Bank $ 1,737,092 13.63 % $ 573,669 4.50 % $ 812,740 6.375 % $ 828,677 6.50 % Total capital (to risk-weighted assets): Company $ 1,649,664 12.94 % $ 1,019,952 8.00 % $ 1,259,004 9.875 % N/A N/A Bank $ 1,830,385 14.36 % $ 1,019,910 8.00 % $ 1,258,951 9.875 % $ 1,274,887 10.00 % Tier 1 capital Company $ 1,556,371 12.21 % $ 764,964 6.00 % $ 1,004,015 7.875 % N/A N/A Bank $ 1,737,092 13.63 % $ 764,932 6.00 % $ 812,740 7.875 % $ 1,019,910 8.00 % Tier 1 capital Company $ 1,556,371 10.55 % $ 590,176 4.00 % N/A N/A N/A N/A Bank $ 1,737,092 11.76 % $ 590,639 4.00 % N/A N/A $ 738,299 5.00 %

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Service charges on deposit accounts and wire transfers are summarized below: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (Dollars in thousands) Noninterest bearing deposit account income: Monthly service charges $ 395 $ 455 $ 1,224 $ 1,340 Customer analysis charges 2,194 1,912 5,788 5,972 NSF charges 1,887 1,961 5,754 5,947 Other service charges 195 225 605 679 Total noninterest bearing deposit account income 4,671 4,553 13,371 13,938 Interest bearing deposit account income: Monthly service charges 19 16 52 45 Total service fees on deposit accounts $ 4,690 $ 4,569 $ 13,423 $ 13,983 Wire transfer fee income: Wire transfer fees $ 963 $ 1,109 $ 3,063 $ 3,338 Foreign exchange fees 95 118 395 346 Total wire transfer fees $ 1,058 $ 1,227 $ 3,458 $ 3,684

Basis of Presentation (Details)

Basis of Presentation (Details) - Accounting Standards Update 2016-13 - Expected - Subsequent Event	Jan. 01, 2020
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in allowance for loan losses	30.00%
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in allowance for loan losses	40.00%

Stock-Based Compensation - Plan

Stock-Based Compensation - Plan Description (Details) - shares	9 Months Ended
	Sep. 30, 2019	May 23, 2019	Sep. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future grant (in shares)	4,026,465
Restricted stock, performance shares and performance units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock, restriction period	1 year
Time based vesting of grants | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock, restriction period	3 years
2016 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares initially available for grant to participants (in shares)			2,400,000
2016 Plan | ISOs, SARs, and NQSOs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
2019 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares initially available for grant to participants (in shares)		4,400,000
2019 Stock Incentive Plan [Member] | Nonemployee director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term	10 years
2019 Stock Incentive Plan [Member] | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock, percent	100.00%
2019 Stock Incentive Plan [Member] | ISOs, SARs, and NQSOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term	10 years
2019 Stock Incentive Plan [Member] | ISOs, SARs, and NQSOs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	5 years

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP compensation expense	$ 57	$ 88	$ 182	$ 277
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Allocated share-based compensation expense	1,600	1,100	3,900	2,900
Tax benefit from compensation expense	$ 400	$ 264	$ 984	$ 747
Stock options
Number of Shares
Outstanding - beginning of period (in shares)			982,631
Granted (in shares)			0
Exercised (in shares)			(702)
Expired (in shares)			(20,718)
Forfeited (in shares)			(18,000)
Outstanding - end of period (in shares)	943,211		943,211
Weighted- Average Exercise Price Per Share
Outstanding - beginning of period (in dollars per share)			$ 15.41
Granted (in dollars per share)			0
Exercised (in dollars per share)			13.10
Expired (in dollars per share)			16.37
Forfeited (in dollars per share)			17.18
Outstanding - end of period (in dollars per share)	$ 15.36		$ 15.36
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options exercisable - end of period (in shares)	847,211		847,211
Options exercisable, Weighted-Average Exercise Price Per Share (in dollars per share)	$ 15.15		$ 15.15
Outstanding, Weighted-Average Remaining Contractual Life (Years)			5 years 9 months
Options exercisable, Weighted-Average Remaining Contractual Life (Years)			5 years 7 months 13 days
Outstanding, Aggregate Intrinsic Value	$ 1,002		$ 1,002
Options exercisable, Aggregate Intrinsic Value	$ 1,002		$ 1,002

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted and Performance Unit Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
ESPP compensation expense	$ 57	$ 88	$ 182	$ 277
Allocated share-based compensation expense	1,600	1,100	3,900	2,900
Tax benefit from compensation expense	$ 400	$ 264	$ 984	747
Retricted and performance unit activity
Number of Shares
Outstanding - beginning of period (in shares)			478,891
Granted (in shares)			767,653
Vested (in shares)			(116,947)
Forfeited (in shares)			(75,031)
Outstanding - end of period (in shares)	1,054,566		1,054,566
Weighted- Average Grant Date Fair Value
Outstanding - beginning of period (in dollars per share)			$ 16.37
Granted (in dollars per share)			13.18
Vested (in dollars per share)			16.96
Forfeited (in dollars per share)			14.71
Outstanding - end of period (in dollars per share)	$ 14.10		$ 14.10
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Total compensation cost not yet recognized	$ 9,400		$ 9,400
Total compensation cost not yet recognized, period for recognition			2 years 10 days
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Equity instruments other than options, vested in period			$ 1,600	$ 2,700
Stock options
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Total compensation cost not yet recognized	$ 298		$ 298
Total compensation cost not yet recognized, period for recognition			1 year 11 months 1 day
Employee Stock Purchase Plan (ESPP)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Discount rate to the closing price, offering period			10.00%
Discount rate to the closing price, purchase date			10.00%
Maximum amount of common shares purchased under ESPP of employee's base salary, percent	20.00%		20.00%
Cap amount for shares purchased per employee			$ 25

Earnings Per Share (Details)

Earnings Per Share (Details)	Jun. 07, 2018USD ($)	Sep. 30, 2019USD ($)$ / sharesshares	Sep. 30, 2018USD ($)$ / sharesshares	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)$ / sharesshares	Sep. 30, 2018USD ($)$ / sharesshares	Dec. 31, 2018USD ($)shares	Jun. 30, 2019USD ($)	Sep. 20, 2018USD ($)	May 11, 2018USD ($)	Apr. 26, 2018USD ($)
Antidilutive Securities Excluded from Computation of Earnings Per Share
Share repurchase program, authorized amount | $								$ 50,000,000	$ 50,000,000		$ 100,000,000
Common stock repurchased and recorded as treasury stock (in shares) | shares					0		9,002,453
Repurchase of treasury stock | $			$ 21,039,000			$ 100,000,000	$ 150,000,000
Net Income (Numerator)
Basic EPS - common stock | $		$ 42,592,000	46,378,000		$ 128,031,000	145,140,000
Diluted EPS - common stock | $		$ 42,592,000	$ 46,378,000		$ 128,031,000	$ 145,140,000
Weighted-Average Shares (Denominator)
Basic EPS - common stock (in shares) | shares		126,685,921	130,268,992		126,661,798	132,930,437
Effect of dilutive securities:
Stock options, restricted stock, and ESPP shares (in shares) | shares		321,548	256,482		234,172	283,632
Diluted EPS - common stock (shares) | shares		127,007,469	130,525,474		126,895,970	133,214,069
Earnings Per Share
Basic EPS - common stock (in dollars per share) | $ / shares		$ 0.34	$ 0.36		$ 1.01	$ 1.09
Diluted EPS - common stock (in dollars per share) | $ / shares		$ 0.34	$ 0.36		$ 1.01	$ 1.09
Convertible Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share
Aggregate principal amount issued | $		$ 217,500,000	$ 217,500,000	$ 217,500,000	$ 217,500,000	$ 217,500,000				$ 200,000,000
Initial conversion rate	0.0450760	0.0450760
Repurchase of treasury stock | $	$ 76,000,000			$ 24,000,000			$ 150,000,000
Stock options and restricted shares
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive shares of common stock | shares		963,400	306,410		986,245	296,357
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive shares of common stock | shares		0	20,845

Equity Investment Securities -

Equity Investment Securities - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Investment [Line Items]
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01					$ (188,000)
Equity investments with readily determinable fair value	$ 49,055,000		$ 49,055,000	$ 49,835,000
Sale of Equity Investments with Readily Determinable Fair Values		$ 2,600,000
Equity Securities, FV-NI, Gain (Loss)		$ 0
Equity investments without readily determinable fair values	26,800,000		26,800,000	26,400,000
Equity investments without readily determinable fair values, impairment	0		0
Equity investments without readily determinable fair values, observable price changes	0		0
Mutual funds
Investment [Line Items]
Equity investments with readily determinable fair value	22,200,000		22,200,000	21,500,000
Equity stock in other institutions
Investment [Line Items]
Equity investments with readily determinable fair value				1,900,000
Correspondent bank stock
Investment [Line Items]
Equity investments without readily determinable fair values	370,000		370,000	370,000
Community development financial institutions
Investment [Line Items]
Equity investments without readily determinable fair values	1,000,000		1,000,000	1,000,000
Community reinvestment act investments
Investment [Line Items]
Equity investments without readily determinable fair values	$ 25,500,000		$ 25,500,000	25,100,000
Retained earnings
Investment [Line Items]
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01				$ (469,000)	$ (469,000)

Equity Investment Securities _2

Equity Investment Securities - Change in Fair Value of Equity Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Net change in fair value recorded during the period on equity investments with readily determinable fair value	$ 168		$ 1,393	$ 1,901
Net change in fair value recorded on equity investments sold during the period	0		0	0
Net change in fair value on equity investments with readily determinable fair values	$ 168	$ (1,617)	$ 1,393	$ 1,901

Securities Available for Sale -

Securities Available for Sale - Summary of Securities Available for Sale (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Reclassification adjustments for net gains realized in net income	$ (153,000)	$ 0	$ (282,000)	$ 0
Amortized Cost	1,748,677,000		1,748,677,000		$ 1,893,618,000
Gross Unrealized Gains	29,352,000		29,352,000		3,010,000
Gross Unrealized Losses	(5,707,000)		(5,707,000)		(50,363,000)
Estimated Fair Value	1,772,322,000		1,772,322,000		1,846,265,000
Unrealized losses on securities	(17,273,000)	$ 54,321,000	(17,273,000)	54,321,000	32,705,000	$ (7,423,000)	$ 45,122,000	$ 21,781,000
Available-for-sale Securities, Gross Realized Gains	224,000		751,000
Available-for-sale Securities, Gross Realized Losses	71,000		469,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	39,000		71,000
Proceeds from sale of securities available for sale	46,500,000		115,628,000	$ 0
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01								(188,000)
Available-for-sale Securities
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on securities	(17,300,000)		(17,300,000)		32,700,000
Retained earnings
Debt Securities, Available-for-sale [Line Items]
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01					(469,000)			$ (469,000)
Collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	795,369,000		795,369,000		914,710,000
Gross Unrealized Gains	7,714,000		7,714,000		1,541,000
Gross Unrealized Losses	(2,012,000)		(2,012,000)		(21,129,000)
Estimated Fair Value	801,071,000		801,071,000		895,122,000
Residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	331,875,000		331,875,000		415,659,000
Gross Unrealized Gains	1,529,000		1,529,000		47,000
Gross Unrealized Losses	(1,281,000)		(1,281,000)		(13,101,000)
Estimated Fair Value	332,123,000		332,123,000		402,605,000
Proceeds from sale of securities available for sale	44,200,000		73,900,000
Commercial
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	545,282,000		545,282,000		481,081,000
Gross Unrealized Gains	18,769,000		18,769,000		1,024,000
Gross Unrealized Losses	(943,000)		(943,000)		(12,979,000)
Estimated Fair Value	563,108,000		563,108,000		469,126,000
Corporate securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,000,000		5,000,000		5,000,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(1,102,000)		(1,102,000)		(1,174,000)
Estimated Fair Value	3,898,000		3,898,000		3,826,000
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	71,151,000		71,151,000		77,168,000
Gross Unrealized Gains	1,340,000		1,340,000		398,000
Gross Unrealized Losses	(369,000)		(369,000)		(1,980,000)
Estimated Fair Value	72,122,000		72,122,000		$ 75,586,000
Proceeds from sale of securities available for sale	$ 2,300,000		$ 41,800,000
Non-US Government and Agency Securities | Credit concentration risk | Stockholders' equity
Debt Securities, Available-for-sale [Line Items]
Maximum exposure to any single issuer			10.00%		10.00%

Securities Available for Sale_2

Securities Available for Sale - Amortized Cost and Estimated Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Amortized Cost
Due within one year	$ 80
Due after one year through five years	349
Due after five years through ten years	0
Due after ten years	75,722
Amortized Cost	1,748,677	$ 1,893,618
Estimated Fair Value
Due within one year	80
Due after one year through five years	351
Due after five years through ten years	0
Due after ten years	75,589
Estimated Fair Value	1,772,322	1,846,265
Carrying value of securities pledged to secure public deposits, pledged for various borrowings and for other purposes required or permitted by law	345,000	354,600
Collateralized mortgage obligations
Amortized Cost
Amortized Cost	795,369	914,710
Estimated Fair Value
No single maturity date	801,071
Estimated Fair Value	801,071	895,122
Residential
Amortized Cost
Amortized Cost	331,875	415,659
Estimated Fair Value
No single maturity date	332,123
Estimated Fair Value	332,123	402,605
Commercial
Amortized Cost
Amortized Cost	545,282	481,081
Estimated Fair Value
No single maturity date	563,108
Estimated Fair Value	563,108	469,126
Corporate securities
Amortized Cost
Amortized Cost	5,000	5,000
Estimated Fair Value
Estimated Fair Value	3,898	3,826
Municipal securities
Amortized Cost
Amortized Cost	71,151	77,168
Estimated Fair Value
Estimated Fair Value	$ 72,122	$ 75,586

Securities Available for Sale_3

Securities Available for Sale - Aggregate Unrealized Losses and Fair Value (Details)	9 Months Ended
	Sep. 30, 2019USD ($)security	Dec. 31, 2018USD ($)security
Number of Securities
Less than 12 months | security	20	21
12 months or longer | security	60	198
Total | security	80	219
Fair Value
Less than 12 months	$ 150,570,000	$ 72,036,000
12 months or longer	450,747,000	1,422,127,000
Total	601,317,000	1,494,163,000
Gross Unrealized Losses
Less than 12 months	(623,000)	(366,000)
12 months or longer	(5,084,000)	(49,997,000)
Total	(5,707,000)	$ (50,363,000)
Collateralized mortgage obligations
Gross Unrealized Losses
12 months or longer	(1,700,000)
OTTI recognized	$ 0
Collateralized mortgage obligations
Number of Securities
Less than 12 months | security	14	1
12 months or longer | security	32	93
Total | security	46	94
Fair Value
Less than 12 months	$ 82,505,000	$ 8,041,000
12 months or longer	194,974,000	700,095,000
Total	277,479,000	708,136,000
Gross Unrealized Losses
Less than 12 months	(324,000)	(28,000)
12 months or longer	(1,688,000)	(21,101,000)
Total	$ (2,012,000)	$ (21,129,000)
Residential
Number of Securities
Less than 12 months | security	1	4
12 months or longer | security	19	45
Total | security	20	49
Fair Value
Less than 12 months	$ 24,570,000	$ 19,973,000
12 months or longer	157,746,000	363,334,000
Total	182,316,000	383,307,000
Gross Unrealized Losses
Less than 12 months	(18,000)	(37,000)
12 months or longer	(1,263,000)	(13,064,000)
Total	$ (1,281,000)	$ (13,101,000)
Commercial
Number of Securities
Less than 12 months | security	4	3
12 months or longer | security	5	27
Total | security	9	30
Fair Value
Less than 12 months	$ 39,882,000	$ 38,494,000
12 months or longer	77,481,000	312,428,000
Total	117,363,000	350,922,000
Gross Unrealized Losses
Less than 12 months	(256,000)	(218,000)
12 months or longer	(687,000)	(12,761,000)
Total	$ (943,000)	$ (12,979,000)
Corporate securities
Number of Securities
Less than 12 months | security	0	0
12 months or longer | security	1	1
Total | security	1	1
Fair Value
Less than 12 months	$ 0	$ 0
12 months or longer	3,898,000	3,826,000
Total	3,898,000	3,826,000
Gross Unrealized Losses
Less than 12 months	0	0
12 months or longer	(1,102,000)	(1,174,000)
Total	$ (1,102,000)	$ (1,174,000)
Municipal securities
Number of Securities
Less than 12 months | security	1	13
12 months or longer | security	3	32
Total | security	4	45
Fair Value
Less than 12 months	$ 3,613,000	$ 5,528,000
12 months or longer	16,648,000	42,444,000
Total	20,261,000	47,972,000
Gross Unrealized Losses
Less than 12 months	(25,000)	(83,000)
12 months or longer	(344,000)	(1,897,000)
Total	(369,000)	$ (1,980,000)
OTTI recognized	0
Mortgage-backed securities
Gross Unrealized Losses
12 months or longer	(2,000,000)
OTTI recognized	$ 0

Loans Receivable and Allowanc_3

Loans Receivable and Allowance for Loan Losses - Schedule of Accounts, Notes, Loans and Financing Receivable (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)segment	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Real estate loans:
Total loans outstanding	$ 12,102,513		$ 12,097,906
Deferred loan costs, net	2,169		209
Loans receivable	12,104,682		12,098,115
Allowance for loan losses	(93,882)	$ (94,066)	(92,557)	$ (90,629)	$ (89,881)	$ (84,541)
Loans receivable, net of allowance for loan losses	$ 12,010,800		12,005,558
Number of portfolio segments | segment	4
Real estate
Real estate loans:
Total loans outstanding	$ 8,587,943		8,721,600
Real estate | Residential
Real estate loans:
Total loans outstanding	46,919		51,197
Allowance for loan losses	(81)		(112)
Real estate | Commercial
Real estate loans:
Total loans outstanding	8,235,839		8,395,327
Allowance for loan losses	(51,336)		(55,890)
Real estate | Construction
Real estate loans:
Total loans outstanding	305,185		275,076
Allowance for loan losses	(1,629)		(765)
Commercial business
Real estate loans:
Total loans outstanding	2,482,817		2,127,630
Allowance for loan losses	(33,530)		(27,765)
Trade finance
Real estate loans:
Total loans outstanding	161,019		197,190
Allowance for loan losses	(524)		(719)
Consumer and other
Real estate loans:
Total loans outstanding	870,734		1,051,486
Allowance for loan losses	$ (6,782)		$ (7,306)

Loans Receivable and Allowanc_4

Loans Receivable and Allowance for Loan Losses - Accretable Yield Movement Schedule on Acquired Credit Impaired Loans in Center Merger (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 43,362	$ 53,573	$ 49,697	$ 55,002
Accretion	(5,234)	(5,239)	(17,916)	(16,970)
Reclassification from nonaccretable difference	1,893	7,889	8,240	18,191
Balance at end of period	$ 40,021	$ 56,223	$ 40,021	$ 56,223

Loans Receivable and Allowanc_5

Loans Receivable and Allowance for Loan Losses - Allowance for Credit Losses on Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Dec. 31, 2018
Allowance for Loan Losses and the Loans Receivables by Impairment Methodology
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend					$ 636	$ 736
Credit for unfunded loan commitments	$ (100)	$ (50)	$ (100)	$ (100)
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	94,066	89,881	92,557	84,541
Provision (credit) for loan losses	2,100	7,300	6,300	12,100
Loans charged off	(2,602)	(6,867)	(6,432)	(9,198)
Recoveries of charge offs	780	315	2,797	3,186
PCI allowance adjustment	(462)		(1,340)
Balance, end of period	93,882	90,629	93,882	90,629
Allowance for loan losses - Individually evaluated for impairment					3,648	4,791
Allowance for loan losses - Collectively evaluated for impairment					81,858	75,603
Allowance for loan losses - Total	93,882	89,881	93,882	84,541	93,882	92,557
Loans outstanding - Individually evaluated for impairment					77,264	104,007
Loans outstanding - Collectively evaluated for impairment					11,913,394	11,846,646
Loans outstanding - Total					12,102,513	12,097,906
Financial Asset Acquired with Credit Deterioration [Member]
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			12,163
Balance, end of period	8,376		8,376
Allowance for loan losses - Total	8,376		8,376		8,376	12,163
Loans outstanding - Total					111,855	147,253
Loans outstanding - PCI loans					19,700	57,900
Legacy Loans
Allowance for Loan Losses by Portfolio Segment
Loans outstanding - Total					10,644,891	10,199,858
Acquired Loans
Allowance for Loan Losses by Portfolio Segment
Provision (credit) for loan losses	(263)	(1,700)	(646)	(737)
Provision (credit) for PCI loan losses	(245)	(1,500)	(2,400)	(851)
Loans outstanding - Total					1,457,622	1,898,048
Real estate
Allowance for Loan Losses by Portfolio Segment
Loans outstanding - Total					8,587,943	8,721,600
Real estate | Legacy Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	47,154	48,235	49,446	45,360
Provision (credit) for loan losses	4	5,537	(3,459)	7,792
Loans charged off	(848)	(5,854)	(1,064)	(6,061)
Recoveries of charge offs	158	41	1,545	868
PCI allowance adjustment	0		0
Balance, end of period	46,468	47,959	46,468	47,959
Allowance for loan losses - Individually evaluated for impairment					117	176
Allowance for loan losses - Collectively evaluated for impairment					46,351	49,270
Allowance for loan losses - Total	47,154	48,235	49,446	45,360	46,468	49,446
Loans outstanding - Individually evaluated for impairment					34,366	39,976
Loans outstanding - Collectively evaluated for impairment					7,272,943	7,037,392
Loans outstanding - Total					7,307,309	7,077,368
Real estate | Legacy Loans | Financial Asset Acquired with Credit Deterioration [Member]
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses - Total	0		0		0	0
Loans outstanding - Total					0	0
Real estate | Acquired Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	6,930	12,816	7,321	13,322
Provision (credit) for loan losses	(91)	1,744	(766)	1,430
Loans charged off	(349)	(191)	(375)	(385)
Recoveries of charge offs	88	0	398	2
PCI allowance adjustment	0		0
Balance, end of period	6,578	14,369	6,578	14,369
Allowance for loan losses - Individually evaluated for impairment					142	261
Allowance for loan losses - Collectively evaluated for impairment					1,752	1,264
Allowance for loan losses - Total	6,930	12,816	6,578	13,322	6,578	7,321
Loans outstanding - Individually evaluated for impairment					15,216	18,080
Loans outstanding - Collectively evaluated for impairment					1,164,527	1,507,858
Loans outstanding - Total					1,280,634	1,644,232
Real estate | Acquired Loans | Financial Asset Acquired with Credit Deterioration [Member]
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			5,796
Balance, end of period	4,684		4,684
Allowance for loan losses - Total	4,684		4,684		4,684	5,796
Loans outstanding - Total					100,891	118,294
Commercial business
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			27,765
Balance, end of period	33,530		33,530
Allowance for loan losses - Total	33,530		33,530		33,530	27,765
Loans outstanding - Total					2,482,817	2,127,630
Commercial business | Legacy Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	26,757	22,031	21,826	17,228
Provision (credit) for loan losses	2,851	(856)	9,655	2,920
Loans charged off	(1,105)	(292)	(3,187)	(1,080)
Recoveries of charge offs	377	188	586	2,003
PCI allowance adjustment	0		0
Balance, end of period	28,880	21,071	28,880	21,071
Allowance for loan losses - Individually evaluated for impairment					2,435	4,221
Allowance for loan losses - Collectively evaluated for impairment					26,445	17,605
Allowance for loan losses - Total	26,757	22,031	21,826	17,228	28,880	21,826
Loans outstanding - Individually evaluated for impairment					20,592	29,624
Loans outstanding - Collectively evaluated for impairment					2,397,490	1,988,067
Loans outstanding - Total					2,418,082	2,017,691
Commercial business | Legacy Loans | Financial Asset Acquired with Credit Deterioration [Member]
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses - Total	0		0		0	0
Loans outstanding - Total					0	0
Commercial business | Acquired Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	4,598	991	5,939	3,527
Provision (credit) for loan losses	(80)	28	233	(2,114)
Loans charged off	(19)	(174)	(896)	(740)
Recoveries of charge offs	151	32	252	204
PCI allowance adjustment	0		(878)
Balance, end of period	4,650	877	4,650	877
Allowance for loan losses - Individually evaluated for impairment					941	130
Allowance for loan losses - Collectively evaluated for impairment					387	460
Allowance for loan losses - Total	4,598	991	4,650	3,527	4,650	5,939
Loans outstanding - Individually evaluated for impairment					3,914	5,734
Loans outstanding - Collectively evaluated for impairment					53,183	80,916
Loans outstanding - Total					64,735	109,939
Commercial business | Acquired Loans | Financial Asset Acquired with Credit Deterioration [Member]
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			5,349
Balance, end of period	3,322		3,322
Allowance for loan losses - Total	3,322		3,322		3,322	5,349
Loans outstanding - Total					7,638	23,289
Trade finance
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			719
Balance, end of period	524		524
Allowance for loan losses - Total	524		524		524	719
Loans outstanding - Total					161,019	197,190
Trade finance | Legacy Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	1,009	983	719	1,674
Provision (credit) for loan losses	(485)	(159)	(195)	(874)
Loans charged off	0	0	0	0
Recoveries of charge offs	0	17	0	41
PCI allowance adjustment	0		0
Balance, end of period	524	841	524	841
Allowance for loan losses - Individually evaluated for impairment					0	0
Allowance for loan losses - Collectively evaluated for impairment					524	719
Allowance for loan losses - Total	1,009	983	524	841	524	719
Loans outstanding - Individually evaluated for impairment					0	5,887
Loans outstanding - Collectively evaluated for impairment					161,019	188,179
Loans outstanding - Total					161,019	194,066
Trade finance | Legacy Loans | Financial Asset Acquired with Credit Deterioration [Member]
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses - Total	0		0		0	0
Loans outstanding - Total					0	0
Trade finance | Acquired Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	0	3	0	42
Provision (credit) for loan losses	0	(3)	0	(42)
Loans charged off	0	0	0	0
Recoveries of charge offs	0	0	0	0
PCI allowance adjustment	0		0
Balance, end of period	0	0	0	0
Allowance for loan losses - Individually evaluated for impairment					0	0
Allowance for loan losses - Collectively evaluated for impairment					0	0
Allowance for loan losses - Total	0	3	0	42	0	0
Loans outstanding - Individually evaluated for impairment					0	3,124
Loans outstanding - Collectively evaluated for impairment					0	0
Loans outstanding - Total					0	3,124
Trade finance | Acquired Loans | Financial Asset Acquired with Credit Deterioration [Member]
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses - Total	0		0		0	0
Loans outstanding - Total					0	0
Consumer and other
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			7,306
Balance, end of period	6,782		6,782
Allowance for loan losses - Total	6,782		6,782		6,782	7,306
Loans outstanding - Total					870,734	1,051,486
Consumer and other | Legacy Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	6,676	4,799	6,269	3,385
Provision (credit) for loan losses	(7)	1,036	945	2,999
Loans charged off	(281)	(343)	(834)	(919)
Recoveries of charge offs	6	1	14	28
PCI allowance adjustment	0		0
Balance, end of period	6,394	5,493	6,394	5,493
Allowance for loan losses - Individually evaluated for impairment					12	3
Allowance for loan losses - Collectively evaluated for impairment					6,382	6,266
Allowance for loan losses - Total	6,676	4,799	6,269	3,385	6,394	6,269
Loans outstanding - Individually evaluated for impairment					2,379	441
Loans outstanding - Collectively evaluated for impairment					756,102	910,292
Loans outstanding - Total					758,481	910,733
Consumer and other | Legacy Loans | Financial Asset Acquired with Credit Deterioration [Member]
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Balance, end of period	0		0
Allowance for loan losses - Total	0		0		0	0
Loans outstanding - Total					0	0
Consumer and other | Acquired Loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	942	23	1,037	3
Provision (credit) for loan losses	(92)	(27)	(113)	(11)
Loans charged off	0	(13)	(76)	(13)
Recoveries of charge offs	0	36	2	40
PCI allowance adjustment	(462)		(462)
Balance, end of period	388	19	388	19
Allowance for loan losses - Individually evaluated for impairment					1	0
Allowance for loan losses - Collectively evaluated for impairment					17	19
Allowance for loan losses - Total	942	$ 23	388	$ 19	388	1,037
Loans outstanding - Individually evaluated for impairment					797	1,141
Loans outstanding - Collectively evaluated for impairment					108,130	133,942
Loans outstanding - Total					112,253	140,753
Consumer and other | Acquired Loans | Financial Asset Acquired with Credit Deterioration [Member]
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			1,018
Balance, end of period	370		370
Allowance for loan losses - Total	$ 370		$ 370		370	1,018
Loans outstanding - Total					$ 3,326	$ 5,670

Loans Receivable and Allowanc_6

Loans Receivable and Allowance for Loan Losses - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)loan	Sep. 30, 2018USD ($)loan	Sep. 30, 2019USD ($)loanloan_pool	Sep. 30, 2018USD ($)loan	Dec. 31, 2018USD ($)
Receivables [Abstract]
Commitment to lend	$ 636,000		$ 636,000		$ 736,000
Credit for unfunded loan commitments	$ (100,000)	$ (50,000)	$ (100,000)	$ (100,000)
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of non-homogeneous loan pools | loan_pool			19
Positive or negative qualitative adjustment of the Loss Migration Ratio	0.50%		0.50%
Provision (credit) for loan losses	$ 2,100,000	7,300,000	$ 6,300,000	12,100,000
Specific reserves TDRs	3,300,000		3,300,000		$ 3,000,000
Specific reserves	17,000	204,000	47,000	242,000
Total charge-offs of TDR loans modified	$ 0	0	33,000	0
Charge offs		0	33,000	0
Specific reserves for the TDRs that had payment defaults		$ 155,000	$ 5,000	$ 158,000
Number of Loans | loan	12	2	16	4
Balance	$ 265,000	$ 2,245,000	$ 270,000	$ 2,498,000
Acquired Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision (credit) for loan losses	(263,000)	(1,700,000)	(646,000)	(737,000)
Provision (credit) for PCI loan losses	$ (245,000)	$ (1,500,000)	$ (2,400,000)	$ (851,000)
Number of Loans | loan	2	0	3	0
Balance	$ 100,000	$ 0	$ 100,000	$ 0
Acquired Loans | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision (credit) for loan losses	$ (91,000)	$ 1,744,000	$ (766,000)	$ 1,430,000
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Acquired Loans | Real estate | Payment concession
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of Loans | loan			1
Balance			$ 96,000
Acquired Loans | Commercial business
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision (credit) for loan losses	$ (80,000)	$ 28,000	$ 233,000	$ (2,114,000)
Number of Loans | loan	1	0	2	0
Balance	$ 4,000	$ 0	$ 4,000	$ 0
Acquired Loans | Commercial business | Payment concession
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of Loans | loan			2
Balance			$ 4,000
Acquired Loans | Consumer And Other Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of Loans | loan			0	0
Balance			$ 0	$ 0
Acquired Loans | Consumer and other
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision (credit) for loan losses	$ (92,000)	$ (27,000)	$ (113,000)	$ (11,000)
Number of Loans | loan	0	0
Balance	$ 0	$ 0
Legacy Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of Loans | loan	10	2	13	4
Balance	$ 165,000	$ 2,245,000	$ 170,000	$ 2,498,000
Legacy Loans | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision (credit) for loan losses	$ 4,000	$ 5,537,000	$ (3,459,000)	$ 7,792,000
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Legacy Loans | Real estate | Maturity / amortization concession
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of Loans | loan				1
Balance				$ 1,200,000
Legacy Loans | Real estate | Payment concession
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of Loans | loan			1	2
Balance			$ 101,000	$ 1,100,000
Legacy Loans | Commercial business
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision (credit) for loan losses	$ 2,851,000	$ (856,000)	$ 9,655,000	$ 2,920,000
Number of Loans | loan	1	0	1	1
Balance	$ 27,000	$ 0	$ 27,000	$ 200,000
Legacy Loans | Commercial business | Maturity / amortization concession
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of Loans | loan				1
Balance				$ 200,000
Legacy Loans | Commercial business | Payment concession
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of Loans | loan			1
Balance			$ 27,000
Legacy Loans | Consumer And Other Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of Loans | loan			11	0
Balance			$ 42,000	$ 0
Legacy Loans | Consumer and other
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision (credit) for loan losses	$ (7,000)	$ 1,036,000	$ 945,000	$ 2,999,000
Number of Loans | loan	8	0
Balance	$ 37,000	$ 0
Legacy Loans | Consumer and other | Payment concession
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of Loans | loan			11
Balance			$ 42,000
Commercial real estate loan portfolio
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of non-homogeneous loan pools | loan_pool			14
Commercial and industrial loan portfolio
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of non-homogeneous loan pools | loan_pool			5
Doubtful or Loss
Financing Receivable, Allowance for Credit Loss [Line Items]
Scope for evaluation of individual impairment, minimum threshold	500,000		$ 500,000
Scope for evaluation of collective impairment, maximum threshold	$ 500,000		$ 500,000

Loans Receivable and Allowanc_7

Loans Receivable and Allowance for Loan Losses - Impaired Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	$ 34,236		$ 34,236		$ 36,047
Recorded Investment, With no related allowance	43,028		43,028		67,960
Related Allowance	3,648		3,648		4,791
Impaired Loans, net of allowance	73,616		73,616		99,216
Total recorded investment	77,264		77,264		104,007
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	46,740		46,740		39,560
Unpaid Contractual Principal Balance, With no related allowance	66,342		66,342		93,141
Impaired Financing Receivable, Unpaid Principal Balance	113,082		113,082		132,701
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	36,218	$ 42,077	38,123	$ 43,429
Average Recorded Investment, With no related allowance	55,400	71,393	66,723	70,525
Average Recorded Investment, Total	91,618	113,470	104,846	113,954
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	280	233	857	716
Interest Income Recognized during Impairment, With no related allowance	228	500	684	1,449
Interest Income Recognized during Impairment, Total	508	733	$ 1,541	2,165
Threshold period for loans to be placed on nonaccrual status			90 days
Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	5,550		$ 5,550		8,474
Recorded Investment, With no related allowance	14,377		14,377		19,605
Related Allowance	1,084		1,084		391
Total recorded investment	19,927		19,927		28,079
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	9,875		9,875		10,566
Unpaid Contractual Principal Balance, With no related allowance	21,065		21,065		26,593
Impaired Financing Receivable, Unpaid Principal Balance	30,940		30,940		37,159
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	4,633	9,526	5,895	10,755
Average Recorded Investment, With no related allowance	19,298	22,783	21,164	21,171
Average Recorded Investment, Total	23,931	32,309	27,059	31,926
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	58	86	182	251
Interest Income Recognized during Impairment, With no related allowance	100	169	293	476
Interest Income Recognized during Impairment, Total	158	255	475	727
Real estate | Residential
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0		0		0
Recorded Investment, With no related allowance	0		0		0
Related Allowance	0		0		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		0
Unpaid Contractual Principal Balance, With no related allowance	0		0		0
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	125	0	63
Average Recorded Investment, With no related allowance	0	0	0	0
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Residential | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0		0		0
Recorded Investment, With no related allowance	0		0		0
Related Allowance	0		0		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		0
Unpaid Contractual Principal Balance, With no related allowance	0		0		0
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	125	0	63
Average Recorded Investment, With no related allowance	0	0	0	0
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Commercial
Impaired Loans, Recorded Investment
Related Allowance	259		259		437
Real estate | Commercial | Retail
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	2,292		2,292		1,375
Recorded Investment, With no related allowance	5,108		5,108		8,005
Related Allowance	75		75		156
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	2,563		2,563		1,487
Unpaid Contractual Principal Balance, With no related allowance	5,973		5,973		11,234
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	2,257	4,740	1,983	4,099
Average Recorded Investment, With no related allowance	8,071	7,901	12,182	10,390
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	9	8	29	22
Interest Income Recognized during Impairment, With no related allowance	39	36	110	107
Real estate | Commercial | Retail | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	888		888		198
Recorded Investment, With no related allowance	2,957		2,957		3,285
Related Allowance	36		36		118
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	922		922		220
Unpaid Contractual Principal Balance, With no related allowance	3,187		3,187		4,151
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	849	793	617	588
Average Recorded Investment, With no related allowance	5,056	3,008	5,233	3,181
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	4	0	12	0
Interest Income Recognized during Impairment, With no related allowance	34	31	94	92
Real estate | Commercial | Hotel & motel
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	1,166		1,166		1,949
Recorded Investment, With no related allowance	9,790		9,790		10,877
Related Allowance	8		8		119
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	6,398		6,398		2,310
Unpaid Contractual Principal Balance, With no related allowance	17,841		17,841		22,590
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	1,478	2,897	1,684	2,888
Average Recorded Investment, With no related allowance	9,963	6,834	10,140	4,887
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Commercial | Hotel & motel | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	54		54		72
Recorded Investment, With no related allowance	5,261		5,261		5,428
Related Allowance	2		2		4
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	345		345		345
Unpaid Contractual Principal Balance, With no related allowance	6,687		6,687		6,874
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	63	73	68	79
Average Recorded Investment, With no related allowance	5,306	3,516	5,358	2,000
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Commercial | Gas station & car wash
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	61		61		0
Recorded Investment, With no related allowance	415		415		545
Related Allowance	3		3		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	1,967		1,967		0
Unpaid Contractual Principal Balance, With no related allowance	938		938		3,653
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	61	0	31	0
Average Recorded Investment, With no related allowance	436	358	487	514
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	4	0	13	0
Real estate | Commercial | Gas station & car wash | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	61		61		0
Recorded Investment, With no related allowance	182		182		247
Related Allowance	3		3		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	1,967		1,967		0
Unpaid Contractual Principal Balance, With no related allowance	705		705		2,673
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	61	0	31	0
Average Recorded Investment, With no related allowance	183	218	214	159
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Commercial | Mixed use
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	629		629		881
Recorded Investment, With no related allowance	3,253		3,253		7,048
Related Allowance	16		16		43
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	720		720		947
Unpaid Contractual Principal Balance, With no related allowance	3,268		3,268		7,058
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	733	3,004	801	2,320
Average Recorded Investment, With no related allowance	3,363	3,886	5,247	2,494
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	1	40	4	115
Interest Income Recognized during Impairment, With no related allowance	50	49	152	149
Real estate | Commercial | Mixed use | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	283		283		312
Recorded Investment, With no related allowance	0		0		3,722
Related Allowance	14		14		38
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	289		289		312
Unpaid Contractual Principal Balance, With no related allowance	0		0		3,726
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	288	2,833	298	2,189
Average Recorded Investment, With no related allowance	97	36	1,955	56
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	1	40	4	115
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Commercial | Industrial & warehouse
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	8,354		8,354		1,305
Recorded Investment, With no related allowance	8,744		8,744		12,343
Related Allowance	144		144		93
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	10,621		10,621		2,139
Unpaid Contractual Principal Balance, With no related allowance	12,519		12,519		13,467
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	7,631	1,721	6,039	1,648
Average Recorded Investment, With no related allowance	10,344	12,209	10,771	11,364
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	91	6	261	22
Interest Income Recognized during Impairment, With no related allowance	52	86	155	249
Real estate | Commercial | Industrial & warehouse | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	325		325		230
Recorded Investment, With no related allowance	0		0		119
Related Allowance	87		87		88
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	1,910		1,910		1,050
Unpaid Contractual Principal Balance, With no related allowance	0		0		894
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	326	258	279	250
Average Recorded Investment, With no related allowance	0	119	53	287
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	1
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Commercial | Other
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	1,098		1,098		7,759
Recorded Investment, With no related allowance	8,672		8,672		5,969
Related Allowance	13		13		26
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	1,819		1,819		8,174
Unpaid Contractual Principal Balance, With no related allowance	13,295		13,295		7,122
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	968	4,322	3,513	5,608
Average Recorded Investment, With no related allowance	12,668	12,559	11,422	14,892
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	5	33	16	133
Interest Income Recognized during Impairment, With no related allowance	66	80	199	230
Real estate | Commercial | Other | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0		0		3,454
Recorded Investment, With no related allowance	5,205		5,205		1,013
Related Allowance	0		0		13
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		3,454
Unpaid Contractual Principal Balance, With no related allowance	9,306		9,306		1,326
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	788	999	1,802
Average Recorded Investment, With no related allowance	5,168	4,364	3,929	5,574
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	3	0	10
Interest Income Recognized during Impairment, With no related allowance	66	63	199	181
Real estate | Construction
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0		0		0
Recorded Investment, With no related allowance	0		0		0
Related Allowance	0		0		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		0
Unpaid Contractual Principal Balance, With no related allowance	0		0		0
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	0	0	0
Average Recorded Investment, With no related allowance	0	0	0	650
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Real estate | Construction | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0		0		0
Recorded Investment, With no related allowance	0		0		0
Related Allowance	0		0		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		0
Unpaid Contractual Principal Balance, With no related allowance	0		0		0
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	0	0	0
Average Recorded Investment, With no related allowance	0	0	0	0
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Commercial business
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	19,572		19,572		22,203
Recorded Investment, With no related allowance	4,934		4,934		13,155
Related Allowance	3,376		3,376		4,351
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	21,558		21,558		23,928
Unpaid Contractual Principal Balance, With no related allowance	10,310		10,310		17,850
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	20,666	22,159	22,453	23,381
Average Recorded Investment, With no related allowance	6,780	20,320	9,810	19,262
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	173	138	545	408
Interest Income Recognized during Impairment, With no related allowance	17	129	55	360
Commercial business | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	3,815		3,815		4,064
Recorded Investment, With no related allowance	99		99		1,670
Related Allowance	941		941		130
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	4,442		4,442		5,041
Unpaid Contractual Principal Balance, With no related allowance	1,041		1,041		2,681
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	2,918	4,506	3,469	5,709
Average Recorded Investment, With no related allowance	1,153	6,894	1,262	5,405
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	53	41	166	121
Interest Income Recognized during Impairment, With no related allowance	0	27	0	65
Trade finance
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0		0		0
Recorded Investment, With no related allowance	0		0		9,011
Related Allowance	0		0		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		0
Unpaid Contractual Principal Balance, With no related allowance	0		0		9,011
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	1,413	2,128	732	2,678
Average Recorded Investment, With no related allowance	1,659	5,785	5,159	4,503
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	2	0	4
Interest Income Recognized during Impairment, With no related allowance	0	120	0	354
Trade finance | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	0		0		0
Recorded Investment, With no related allowance	0		0		3,124
Related Allowance	0		0		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		0
Unpaid Contractual Principal Balance, With no related allowance	0		0		3,124
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	0	0	0	0
Average Recorded Investment, With no related allowance	1,659	3,097	2,377	3,136
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	0	0	0
Interest Income Recognized during Impairment, With no related allowance	0	48	0	138
Consumer and other
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	1,064		1,064		575
Recorded Investment, With no related allowance	2,112		2,112		1,007
Related Allowance	13		13		3
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	1,094		1,094		575
Unpaid Contractual Principal Balance, With no related allowance	2,198		2,198		1,156
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	1,011	981	887	744
Average Recorded Investment, With no related allowance	2,116	1,541	1,505	1,569
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	1	6	2	12
Interest Income Recognized during Impairment, With no related allowance	0	0	0	0
Consumer and other | Acquired Loans
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	124		124		144
Recorded Investment, With no related allowance	673		673		997
Related Allowance	1		1		0
Impaired Loans, Unpaid Principal Balance
Unpaid Contractual Principal Balance, With related allowance	0		0		144
Unpaid Contractual Principal Balance, With no related allowance	139		139		1,144
Impaired Loans, Average Recorded Investment
Average Recorded Investment, With related allowance	128	150	134	75
Average Recorded Investment, With no related allowance	676	1,531	783	1,373
Impaired Loans, Interest Income Recognized during Impairment
Interest Income Recognized during Impairment, With related allowance	0	2	0	4
Interest Income Recognized during Impairment, With no related allowance	0	$ 0	0	$ 0
WIthout charge-offs
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	30,473		30,473		35,365
Recorded Investment, With no related allowance	31,884		31,884		59,607
With charge-offs
Impaired Loans, Recorded Investment
Recorded Investment, With related allowance	3,763		3,763		681
Recorded Investment, With no related allowance	$ 11,144		$ 11,144		$ 8,354

Loans Receivable and Allowanc_8

Loans Receivable and Allowance for Loan Losses - Past Due Financing Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 42,235	$ 53,286
Accruing loans past due 90 or more days	398	1,529
Guaranteed portion of delinquent SBA loans excluded from Nonaccrual loans	37,300	29,200
Past due loans	52,227	56,936
30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	26,487	28,467
60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	4,902	1,407
90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	20,838	27,062
Legacy Loans
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	32,409	42,248
Accruing loans past due 90 or more days	398	243
Past due loans	34,563	47,005
Legacy Loans | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	14,807	27,137
Legacy Loans | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	4,530	575
Legacy Loans | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	15,226	19,293
Acquired Loans
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	9,826	11,038
Accruing loans past due 90 or more days	0	1,286
Past due loans	17,664	9,931
Acquired Loans | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	11,680	1,330
Acquired Loans | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	372	832
Acquired Loans | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	5,612	7,769
Residential | Legacy Loans
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	0
Accruing loans past due 90 or more days	0	0
Residential | Acquired Loans
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	0
Accruing loans past due 90 or more days	0	0
Commercial | Legacy Loans | Retail
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	2,956	5,153
Accruing loans past due 90 or more days	0	0
Commercial | Legacy Loans | Hotel & motel
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	5,641	7,325
Accruing loans past due 90 or more days	0	0
Commercial | Legacy Loans | Gas station & car wash
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	31
Accruing loans past due 90 or more days	0	0
Commercial | Legacy Loans | Mixed use
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	516	749
Accruing loans past due 90 or more days	0	0
Commercial | Legacy Loans | Industrial & warehouse
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	6,325	6,111
Accruing loans past due 90 or more days	0	0
Commercial | Legacy Loans | Other
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	4,226	5,940
Accruing loans past due 90 or more days	0	0
Commercial | Acquired Loans | Retail
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	920	829
Accruing loans past due 90 or more days	0	0
Commercial | Acquired Loans | Hotel & motel
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	5,315	5,500
Accruing loans past due 90 or more days	0	1,286
Commercial | Acquired Loans | Gas station & car wash
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	243	247
Accruing loans past due 90 or more days	0	0
Commercial | Acquired Loans | Mixed use
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	167	1,224
Accruing loans past due 90 or more days	0	0
Commercial | Acquired Loans | Industrial & warehouse
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	325	349
Accruing loans past due 90 or more days	0	0
Commercial | Acquired Loans | Other
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	1,286	259
Accruing loans past due 90 or more days	0	0
Construction | Legacy Loans
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	0
Accruing loans past due 90 or more days	0	0
Construction | Acquired Loans
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	0
Accruing loans past due 90 or more days	0	0
Commercial business | Legacy Loans
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	10,469	14,837
Accruing loans past due 90 or more days	0	0
Past due loans	5,944	12,938
Commercial business | Legacy Loans | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	1,599	5,500
Commercial business | Legacy Loans | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	428	435
Commercial business | Legacy Loans | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	3,917	7,003
Commercial business | Acquired Loans
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	773	1,632
Accruing loans past due 90 or more days	0	0
Past due loans	423	1,263
Commercial business | Acquired Loans | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	266	397
Commercial business | Acquired Loans | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	17	613
Commercial business | Acquired Loans | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	140	253
Trade finance | Legacy Loans
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	1,661
Accruing loans past due 90 or more days	0	0
Past due loans	50	2,697
Trade finance | Legacy Loans | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	50	1,036
Trade finance | Legacy Loans | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Trade finance | Legacy Loans | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	1,661
Trade finance | Acquired Loans
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	0
Accruing loans past due 90 or more days	0	0
Past due loans	0	0
Trade finance | Acquired Loans | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Trade finance | Acquired Loans | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Trade finance | Acquired Loans | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Consumer and other | Legacy Loans
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	2,276	441
Accruing loans past due 90 or more days	398	243
Past due loans	8,881	16,800
Consumer and other | Legacy Loans | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	6,551	16,413
Consumer and other | Legacy Loans | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	370	140
Consumer and other | Legacy Loans | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	1,960	247
Consumer and other | Acquired Loans
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	797	998
Accruing loans past due 90 or more days	0	0
Past due loans	665	334
Consumer and other | Acquired Loans | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	117	0
Consumer and other | Acquired Loans | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	280	0
Consumer and other | Acquired Loans | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	268	334
Real estate | Legacy Loans | Residential
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Residential | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Residential | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Residential | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Construction
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Construction | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Construction | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Construction | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Retail | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans	2,345	1,542
Real estate | Legacy Loans | Retail | Commercial | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	1,238	733
Real estate | Legacy Loans | Retail | Commercial | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Retail | Commercial | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	1,107	809
Real estate | Legacy Loans | Hotel & motel | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans	3,399	5,368
Real estate | Legacy Loans | Hotel & motel | Commercial | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	945	153
Real estate | Legacy Loans | Hotel & motel | Commercial | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	334	0
Real estate | Legacy Loans | Hotel & motel | Commercial | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	2,120	5,215
Real estate | Legacy Loans | Gas station & car wash | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans	2,733	31
Real estate | Legacy Loans | Gas station & car wash | Commercial | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	921	0
Real estate | Legacy Loans | Gas station & car wash | Commercial | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	1,812	0
Real estate | Legacy Loans | Gas station & car wash | Commercial | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	31
Real estate | Legacy Loans | Mixed use | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans	803	0
Real estate | Legacy Loans | Mixed use | Commercial | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	169	0
Real estate | Legacy Loans | Mixed use | Commercial | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	634	0
Real estate | Legacy Loans | Mixed use | Commercial | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Industrial & warehouse | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans	4,711	3,387
Real estate | Legacy Loans | Industrial & warehouse | Commercial | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	1,465
Real estate | Legacy Loans | Industrial & warehouse | Commercial | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	952	0
Real estate | Legacy Loans | Industrial & warehouse | Commercial | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	3,759	1,922
Real estate | Legacy Loans | Other | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans	5,697	4,242
Real estate | Legacy Loans | Other | Commercial | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	3,334	1,837
Real estate | Legacy Loans | Other | Commercial | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Legacy Loans | Other | Commercial | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	2,363	2,405
Real estate | Acquired Loans | Residential
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Residential | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Residential | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Residential | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Construction
Financing Receivable, Past Due [Line Items]
Past due loans	10,165	0
Real estate | Acquired Loans | Construction | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	10,165	0
Real estate | Acquired Loans | Construction | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Construction | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Retail | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans	716	949
Real estate | Acquired Loans | Retail | Commercial | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	96	347
Real estate | Acquired Loans | Retail | Commercial | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Retail | Commercial | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	620	602
Real estate | Acquired Loans | Hotel & motel | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans	4,384	5,206
Real estate | Acquired Loans | Hotel & motel | Commercial | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	411	0
Real estate | Acquired Loans | Hotel & motel | Commercial | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Hotel & motel | Commercial | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	3,973	5,206
Real estate | Acquired Loans | Gas station & car wash | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans	221	375
Real estate | Acquired Loans | Gas station & car wash | Commercial | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	154
Real estate | Acquired Loans | Gas station & car wash | Commercial | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Gas station & car wash | Commercial | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	221	221
Real estate | Acquired Loans | Mixed use | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans	0	1,141
Real estate | Acquired Loans | Mixed use | Commercial | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	107
Real estate | Acquired Loans | Mixed use | Commercial | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	0
Real estate | Acquired Loans | Mixed use | Commercial | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	1,034
Real estate | Acquired Loans | Industrial & warehouse | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans	793	261
Real estate | Acquired Loans | Industrial & warehouse | Commercial | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	625	142
Real estate | Acquired Loans | Industrial & warehouse | Commercial | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	75	0
Real estate | Acquired Loans | Industrial & warehouse | Commercial | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	93	119
Real estate | Acquired Loans | Other | Commercial
Financing Receivable, Past Due [Line Items]
Past due loans	297	402
Real estate | Acquired Loans | Other | Commercial | 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	183
Real estate | Acquired Loans | Other | Commercial | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	0	219
Real estate | Acquired Loans | Other | Commercial | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Past due loans	$ 297	$ 0

Loans Receivable and Allowanc_9

Loans Receivable and Allowance for Loan Losses - Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 12,102,513	$ 12,097,906
Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	11,694,043	11,616,490
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	139,848	163,089
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	268,605	317,915
Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	17	412
Real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	8,587,943	8,721,600
Real estate | Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	46,919	51,197
Real estate | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	8,235,839	8,395,327
Real estate | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	305,185	275,076
Commercial business
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,482,817	2,127,630
Trade finance
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	161,019	197,190
Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	870,734	1,051,486
Legacy Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	10,644,891	10,199,858
Legacy Loans | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	10,358,464	9,884,742
Legacy Loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	101,892	121,622
Legacy Loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	184,518	193,494
Legacy Loans | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	17	0
Legacy Loans | Real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	7,307,309	7,077,368
Legacy Loans | Real estate | Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	42,292	44,612
Legacy Loans | Real estate | Residential | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	42,148	44,066
Legacy Loans | Real estate | Residential | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Legacy Loans | Real estate | Residential | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	144	546
Legacy Loans | Real estate | Residential | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Legacy Loans | Real estate | Commercial | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,926,815	1,863,928
Legacy Loans | Real estate | Commercial | Retail | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,863,725	1,815,170
Legacy Loans | Real estate | Commercial | Retail | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	28,749	18,072
Legacy Loans | Real estate | Commercial | Retail | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	34,341	30,686
Legacy Loans | Real estate | Commercial | Retail | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Legacy Loans | Real estate | Commercial | Hotel & motel
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,443,898	1,427,150
Legacy Loans | Real estate | Commercial | Hotel & motel | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,412,952	1,389,349
Legacy Loans | Real estate | Commercial | Hotel & motel | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	419	21,932
Legacy Loans | Real estate | Commercial | Hotel & motel | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	30,527	15,869
Legacy Loans | Real estate | Commercial | Hotel & motel | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Legacy Loans | Real estate | Commercial | Gas station & car wash
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	798,910	819,565
Legacy Loans | Real estate | Commercial | Gas station & car wash | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	790,464	814,291
Legacy Loans | Real estate | Commercial | Gas station & car wash | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	3,858	2,810
Legacy Loans | Real estate | Commercial | Gas station & car wash | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	4,588	2,464
Legacy Loans | Real estate | Commercial | Gas station & car wash | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Legacy Loans | Real estate | Commercial | Mixed use
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	586,674	535,793
Legacy Loans | Real estate | Commercial | Mixed use | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	575,998	510,021
Legacy Loans | Real estate | Commercial | Mixed use | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,496	12,480
Legacy Loans | Real estate | Commercial | Mixed use | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	9,180	13,292
Legacy Loans | Real estate | Commercial | Mixed use | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Legacy Loans | Real estate | Commercial | Industrial & warehouse
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	788,957	751,233
Legacy Loans | Real estate | Commercial | Industrial & warehouse | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	752,813	711,236
Legacy Loans | Real estate | Commercial | Industrial & warehouse | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,459	1,665
Legacy Loans | Real estate | Commercial | Industrial & warehouse | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	34,685	38,332
Legacy Loans | Real estate | Commercial | Industrial & warehouse | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Legacy Loans | Real estate | Commercial | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,424,743	1,396,952
Legacy Loans | Real estate | Commercial | Other | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,370,768	1,326,795
Legacy Loans | Real estate | Commercial | Other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	21,218	35,539
Legacy Loans | Real estate | Commercial | Other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	32,757	34,618
Legacy Loans | Real estate | Commercial | Other | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Legacy Loans | Real estate | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	295,020	238,135
Legacy Loans | Real estate | Construction | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	278,109	227,231
Legacy Loans | Real estate | Construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	9,880	10,904
Legacy Loans | Real estate | Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	7,031	0
Legacy Loans | Real estate | Construction | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Legacy Loans | Commercial business
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,418,082	2,017,691
Legacy Loans | Commercial business | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,354,480	1,944,783
Legacy Loans | Commercial business | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	34,643	18,220
Legacy Loans | Commercial business | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	28,942	54,688
Legacy Loans | Commercial business | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	17	0
Legacy Loans | Trade finance
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	161,019	194,066
Legacy Loans | Trade finance | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	161,019	191,508
Legacy Loans | Trade finance | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Legacy Loans | Trade finance | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	2,558
Legacy Loans | Trade finance | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Legacy Loans | Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	758,481	910,733
Legacy Loans | Consumer and other | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	755,988	910,292
Legacy Loans | Consumer and other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	170	0
Legacy Loans | Consumer and other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,323	441
Legacy Loans | Consumer and other | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Acquired Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,457,622	1,898,048
Acquired Loans | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,335,579	1,731,748
Acquired Loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	37,956	41,467
Acquired Loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	84,087	124,421
Acquired Loans | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	412
Acquired Loans | Real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,280,634	1,644,232
Acquired Loans | Real estate | Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	4,627	6,585
Acquired Loans | Real estate | Residential | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	3,919	5,812
Acquired Loans | Real estate | Residential | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	385	393
Acquired Loans | Real estate | Residential | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	323	380
Acquired Loans | Real estate | Residential | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Acquired Loans | Real estate | Commercial | Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	367,878	505,957
Acquired Loans | Real estate | Commercial | Retail | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	348,739	483,939
Acquired Loans | Real estate | Commercial | Retail | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	6,489	4,651
Acquired Loans | Real estate | Commercial | Retail | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	12,650	17,332
Acquired Loans | Real estate | Commercial | Retail | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	35
Acquired Loans | Real estate | Commercial | Hotel & motel
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	163,833	207,040
Acquired Loans | Real estate | Commercial | Hotel & motel | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	151,908	186,761
Acquired Loans | Real estate | Commercial | Hotel & motel | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	159	807
Acquired Loans | Real estate | Commercial | Hotel & motel | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	11,766	19,472
Acquired Loans | Real estate | Commercial | Hotel & motel | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Acquired Loans | Real estate | Commercial | Gas station & car wash
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	118,929	155,008
Acquired Loans | Real estate | Commercial | Gas station & car wash | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	114,550	148,702
Acquired Loans | Real estate | Commercial | Gas station & car wash | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	274
Acquired Loans | Real estate | Commercial | Gas station & car wash | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	4,379	6,032
Acquired Loans | Real estate | Commercial | Gas station & car wash | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Acquired Loans | Real estate | Commercial | Mixed use
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	90,798	89,237
Acquired Loans | Real estate | Commercial | Mixed use | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	79,384	77,100
Acquired Loans | Real estate | Commercial | Mixed use | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	7,154	3,986
Acquired Loans | Real estate | Commercial | Mixed use | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	4,260	8,151
Acquired Loans | Real estate | Commercial | Mixed use | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Acquired Loans | Real estate | Commercial | Industrial & warehouse
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	160,380	199,319
Acquired Loans | Real estate | Commercial | Industrial & warehouse | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	145,147	171,574
Acquired Loans | Real estate | Commercial | Industrial & warehouse | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	4,404	9,451
Acquired Loans | Real estate | Commercial | Industrial & warehouse | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	10,829	18,071
Acquired Loans | Real estate | Commercial | Industrial & warehouse | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	223
Acquired Loans | Real estate | Commercial | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	364,024	444,145
Acquired Loans | Real estate | Commercial | Other | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	331,772	402,247
Acquired Loans | Real estate | Commercial | Other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	8,564	12,902
Acquired Loans | Real estate | Commercial | Other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	23,688	28,996
Acquired Loans | Real estate | Commercial | Other | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Acquired Loans | Real estate | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	10,165	36,941
Acquired Loans | Real estate | Construction | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	29,058
Acquired Loans | Real estate | Construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	10,165	7,883
Acquired Loans | Real estate | Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Acquired Loans | Real estate | Construction | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Acquired Loans | Commercial business
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	64,735	109,939
Acquired Loans | Commercial business | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	50,333	89,611
Acquired Loans | Commercial business | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	623	1,083
Acquired Loans | Commercial business | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	13,779	19,237
Acquired Loans | Commercial business | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	8
Acquired Loans | Trade finance
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	3,124
Acquired Loans | Trade finance | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Acquired Loans | Trade finance | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Acquired Loans | Trade finance | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	3,124
Acquired Loans | Trade finance | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Acquired Loans | Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	112,253	140,753
Acquired Loans | Consumer and other | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	109,827	136,944
Acquired Loans | Consumer and other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	13	37
Acquired Loans | Consumer and other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,413	3,626
Acquired Loans | Consumer and other | Doubtful or Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 0	$ 146

Loans Receivable and Allowan_10

Loans Receivable and Allowance for Loan Losses - Loans Held For Investment - Reclassification to Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale or reclassification to held for sale	$ 25,988	$ 525	$ 108,979	$ 6,680
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale or reclassification to held for sale	25,988	0	25,988	0
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale or reclassification to held for sale	$ 0	$ 525	$ 82,991	$ 6,680

Loans Receivable and Allowan_11

Loans Receivable and Allowance for Loan Losses - Allowance for Loans, by Portfolio Segment and Impairment Method (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	$ 77,264		$ 104,007
Specific allowance	$ 3,648		$ 4,791
Specific allowance to impaired loans	4.72%		4.61%
Other loans	$ 12,025,249		$ 11,993,899
General allowance	$ 90,234		$ 87,766
General allowance to other loans	0.75%		0.73%
Total loans	$ 12,102,513		$ 12,097,906
Total allowance for loan losses	$ 93,882	$ 94,066	$ 92,557	$ 90,629	$ 89,881	$ 84,541
Total allowance to total loans	0.78%		0.77%
Real estate
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	$ 8,587,943		$ 8,721,600
Real estate | Residential
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	0		0
Specific allowance	0		0
Other loans	46,919		51,197
General allowance	$ 81		$ 112
General allowance to other loans	0.17%		0.22%
Total loans	$ 46,919		$ 51,197
Total allowance for loan losses	$ 81		$ 112
Total allowance to total loans	0.17%		0.22%
Real estate | Commercial
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	$ 49,582		$ 58,056
Specific allowance	$ 259		$ 437
Specific allowance to impaired loans	0.52%		0.75%
Other loans	$ 8,186,257		$ 8,337,271
General allowance	$ 51,077		$ 55,453
General allowance to other loans	0.62%		0.67%
Total loans	$ 8,235,839		$ 8,395,327
Total allowance for loan losses	$ 51,336		$ 55,890
Total allowance to total loans	0.62%		0.67%
Real estate | Construction
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	$ 0		$ 0
Specific allowance	0		0
Other loans	305,185		275,076
General allowance	$ 1,629		$ 765
General allowance to other loans	0.53%		0.28%
Total loans	$ 305,185		$ 275,076
Total allowance for loan losses	$ 1,629		$ 765
Total allowance to total loans	0.53%		0.28%
Commercial business
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	$ 24,506		$ 35,358
Specific allowance	$ 3,376		$ 4,351
Specific allowance to impaired loans	13.78%		12.31%
Other loans	$ 2,458,311		$ 2,092,272
General allowance	$ 30,154		$ 23,414
General allowance to other loans	1.23%		1.12%
Total loans	$ 2,482,817		$ 2,127,630
Total allowance for loan losses	$ 33,530		$ 27,765
Total allowance to total loans	1.35%		1.30%
Trade finance
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	$ 0		$ 9,011
Specific allowance	0		$ 0
Specific allowance to impaired loans			0.00%
Other loans	161,019		$ 188,179
General allowance	$ 524		$ 719
General allowance to other loans	0.33%		0.38%
Total loans	$ 161,019		$ 197,190
Total allowance for loan losses	$ 524		$ 719
Total allowance to total loans	0.33%		0.36%
Consumer and other
Loans by Portfolio Segment and Impairment Method [Abstract]
Impaired loans (recorded investment)	$ 3,176		$ 1,582
Specific allowance	$ 13		$ 3
Specific allowance to impaired loans	0.41%		0.19%
Other loans	$ 867,558		$ 1,049,904
General allowance	$ 6,769		$ 7,303
General allowance to other loans	0.78%		0.70%
Total loans	$ 870,734		$ 1,051,486
Total allowance for loan losses	$ 6,782		$ 7,306
Total allowance to total loans	0.78%		0.69%
Acquired Loans
Loans by Portfolio Segment and Impairment Method [Abstract]
Specific allowance	$ 1,084		$ 391
Total loans	1,457,622		1,898,048
Acquired Loans | Real estate
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	1,280,634		1,644,232
Total allowance for loan losses	6,578	6,930	7,321	14,369	12,816	13,322
Acquired Loans | Real estate | Residential
Loans by Portfolio Segment and Impairment Method [Abstract]
Specific allowance	0		0
Total loans	4,627		6,585
Acquired Loans | Real estate | Construction
Loans by Portfolio Segment and Impairment Method [Abstract]
Specific allowance	0		0
Total loans	10,165		36,941
Acquired Loans | Commercial business
Loans by Portfolio Segment and Impairment Method [Abstract]
Specific allowance	941		130
Total loans	64,735		109,939
Total allowance for loan losses	4,650	4,598	5,939	877	991	3,527
Acquired Loans | Trade finance
Loans by Portfolio Segment and Impairment Method [Abstract]
Specific allowance	0		0
Total loans	0		3,124
Total allowance for loan losses	0	0	0	0	3	42
Acquired Loans | Consumer and other
Loans by Portfolio Segment and Impairment Method [Abstract]
Specific allowance	1		0
Total loans	112,253		140,753
Total allowance for loan losses	388	942	1,037	19	23	3
Legacy Loans
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	10,644,891		10,199,858
Legacy Loans | Real estate
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	7,307,309		7,077,368
Total allowance for loan losses	46,468	47,154	49,446	47,959	48,235	45,360
Legacy Loans | Real estate | Residential
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	42,292		44,612
Legacy Loans | Real estate | Construction
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	295,020		238,135
Legacy Loans | Commercial business
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	2,418,082		2,017,691
Total allowance for loan losses	28,880	26,757	21,826	21,071	22,031	17,228
Legacy Loans | Trade finance
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	161,019		194,066
Total allowance for loan losses	524	1,009	719	841	983	1,674
Legacy Loans | Consumer and other
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	758,481		910,733
Total allowance for loan losses	6,394	$ 6,676	6,269	$ 5,493	$ 4,799	$ 3,385
Financial Asset Acquired with Credit Deterioration [Member]
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	111,855		147,253
Total allowance for loan losses	8,376		12,163
Financial Asset Acquired with Credit Deterioration [Member] | Acquired Loans | Real estate
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	100,891		118,294
Total allowance for loan losses	4,684		5,796
Financial Asset Acquired with Credit Deterioration [Member] | Acquired Loans | Commercial business
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	7,638		23,289
Total allowance for loan losses	3,322		5,349
Financial Asset Acquired with Credit Deterioration [Member] | Acquired Loans | Trade finance
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	0		0
Total allowance for loan losses	0		0
Financial Asset Acquired with Credit Deterioration [Member] | Acquired Loans | Consumer and other
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	3,326		5,670
Total allowance for loan losses	370		1,018
Financial Asset Acquired with Credit Deterioration [Member] | Legacy Loans | Real estate
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	0		0
Total allowance for loan losses	0		0
Financial Asset Acquired with Credit Deterioration [Member] | Legacy Loans | Commercial business
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	0		0
Total allowance for loan losses	0		0
Financial Asset Acquired with Credit Deterioration [Member] | Legacy Loans | Trade finance
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	0		0
Total allowance for loan losses	0		0
Financial Asset Acquired with Credit Deterioration [Member] | Legacy Loans | Consumer and other
Loans by Portfolio Segment and Impairment Method [Abstract]
Total loans	0		0
Total allowance for loan losses	$ 0		$ 0

Loans Receivable and Allowan_12

Loans Receivable and Allowance for Loan Losses - Troubled Debt Restructurings on Financing Receivables (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019USD ($)loan	Sep. 30, 2018USD ($)loan	Sep. 30, 2019USD ($)loan	Sep. 30, 2018USD ($)loan	Dec. 31, 2018USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Specific reserves for the TDRs that had payment defaults		$ 155,000	$ 5,000	$ 158,000
Charge offs		0	33,000	0
Specific reserves	$ 17,000	204,000	47,000	242,000
Total charge-offs of TDR loans modified	0	$ 0	33,000	$ 0
Troubled debt restructured	$ 46,176,000		$ 46,176,000		$ 64,012,000
Number of modified contracts | loan	4	11	33	31
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 1,071,000	$ 6,088,000	$ 5,997,000	$ 19,711,000
Post-Modification	$ 1,071,000	$ 6,088,000	$ 5,997,000	$ 19,711,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	12	2	16	4
Balance	$ 265,000	$ 2,245,000	$ 270,000	$ 2,498,000
Minimum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Temporary modifications, period of interest only payments			3 months
Maximum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Temporary modifications, period of interest only payments			6 months
Legacy Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	3	6	27	23
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 743,000	$ 5,395,000	$ 4,463,000	$ 15,050,000
Post-Modification	$ 743,000	$ 5,395,000	$ 4,463,000	$ 15,050,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	10	2	13	4
Balance	$ 165,000	$ 2,245,000	$ 170,000	$ 2,498,000
Acquired Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	1	5	6	8
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 328,000	$ 693,000	$ 1,534,000	$ 4,661,000
Post-Modification	$ 328,000	$ 693,000	$ 1,534,000	$ 4,661,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	2	0	3	0
Balance	$ 100,000	$ 0	$ 100,000	$ 0
Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	10,827,000		10,827,000		9,065,000
Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	28,171,000		28,171,000		48,899,000
Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	7,178,000		7,178,000		6,048,000
TDR on accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	34,717,000		34,717,000		50,410,000
TDR on accrual | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	6,029,000		6,029,000		6,103,000
TDR on accrual | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	21,932,000		21,932,000		38,660,000
TDR on accrual | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	6,756,000		6,756,000		5,647,000
TDR on non-accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	11,459,000		11,459,000		13,602,000
TDR on non-accrual | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	4,798,000		4,798,000		2,962,000
TDR on non-accrual | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	6,239,000		6,239,000		10,239,000
TDR on non-accrual | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	$ 422,000		$ 422,000		401,000
Commercial | TDR on accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured					$ 24,000,000
Number of modified contracts | loan			14		20
Real estate | Legacy Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Legacy Loans | Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Real estate | Legacy Loans | Retail
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	0	2
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 54,000
Post-Modification	$ 0	$ 0	$ 0	$ 54,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Legacy Loans | Hotel & motel
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	1	0	3	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 574,000	$ 0	$ 1,439,000	$ 0
Post-Modification	$ 574,000	$ 0	$ 1,439,000	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	1	0	1
Balance	$ 0	$ 1,019,000	$ 0	$ 53,000
Real estate | Legacy Loans | Gas station & car wash
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	1
Balance	$ 0	$ 0	$ 0	$ 1,019,000
Real estate | Legacy Loans | Mixed use
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Legacy Loans | Industrial & warehouse
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	0	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 2,078,000
Post-Modification	$ 0	$ 0	$ 0	$ 2,078,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Legacy Loans | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	1	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 101,000	$ 1,226,000
Post-Modification	$ 0	$ 0	$ 101,000	$ 1,226,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	1	1	1	1
Balance	$ 101,000	$ 1,226,000	$ 101,000	$ 1,226,000
Real estate | Acquired Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Acquired Loans | Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Real estate | Acquired Loans | Retail
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	1	0	3	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 328,000	$ 0	$ 449,000	$ 0
Post-Modification	$ 328,000	$ 0	$ 449,000	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	1	0	1	0
Balance	$ 96,000	$ 0	$ 96,000	$ 0
Real estate | Acquired Loans | Hotel & motel
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	1	0	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 73,000	$ 0	$ 73,000
Post-Modification	$ 0	$ 73,000	$ 0	$ 73,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Acquired Loans | Gas station & car wash
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Acquired Loans | Mixed use
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	0	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 2,704,000
Post-Modification	$ 0	$ 0	$ 0	$ 2,704,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Acquired Loans | Industrial & warehouse
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	1	0	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 237,000	$ 0	$ 237,000
Post-Modification	$ 0	$ 237,000	$ 0	$ 237,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Acquired Loans | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	2	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 954,000	$ 0
Post-Modification	$ 0	$ 0	$ 954,000	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Real estate | Payment concession | Legacy Loans
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan			1	2
Balance			$ 101,000	$ 1,100,000
Real estate | Payment concession | Acquired Loans
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan			1
Balance			$ 96,000
Real estate | Maturity / amortization concession | Legacy Loans
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan				1
Balance				$ 1,200,000
Real estate | Commercial | TDR on accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	21,360,000		21,360,000		$ 24,026,000
Real estate | Commercial | TDR on accrual | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	4,984,000		4,984,000		5,142,000
Real estate | Commercial | TDR on accrual | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	11,861,000		11,861,000		14,012,000
Real estate | Commercial | TDR on accrual | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	4,515,000		4,515,000		4,872,000
Real estate | Commercial | TDR on non-accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	4,857,000		4,857,000		2,617,000
Real estate | Commercial | TDR on non-accrual | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	4,504,000		4,504,000		2,216,000
Real estate | Commercial | TDR on non-accrual | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	0		0		0
Real estate | Commercial | TDR on non-accrual | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	$ 353,000		$ 353,000		401,000
Commercial business | Legacy Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	2	5	13	17
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 169,000	$ 4,497,000	$ 2,868,000	$ 10,727,000
Post-Modification	$ 169,000	$ 4,497,000	$ 2,868,000	$ 10,727,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	1	0	1	1
Balance	$ 27,000	$ 0	$ 27,000	$ 200,000
Commercial business | Acquired Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	3	1	5
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 383,000	$ 131,000	$ 1,647,000
Post-Modification	$ 0	$ 383,000	$ 131,000	$ 1,647,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	1	0	2	0
Balance	$ 4,000	$ 0	$ 4,000	$ 0
Commercial business | Payment concession | Legacy Loans
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan			1
Balance			$ 27,000
Commercial business | Payment concession | Acquired Loans
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan			2
Balance			$ 4,000
Commercial business | Maturity / amortization concession | Legacy Loans
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan				1
Balance				$ 200,000
Commercial business | TDR on accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	13,264,000		$ 13,264,000		$ 18,890,000
Number of modified contracts | loan			30		37
Commercial business | TDR on accrual | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	999,000		$ 999,000		$ 961,000
Commercial business | TDR on accrual | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	10,024,000		10,024,000		17,257,000
Commercial business | TDR on accrual | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	2,241,000		2,241,000		672,000
Commercial business | TDR on non-accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	6,478,000		6,478,000		10,912,000
Commercial business | TDR on non-accrual | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	294,000		294,000		746,000
Commercial business | TDR on non-accrual | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	6,115,000		6,115,000		10,166,000
Commercial business | TDR on non-accrual | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	$ 69,000		$ 69,000		0
Trade finance | Legacy Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	1	0	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 898,000	$ 0	$ 898,000
Post-Modification	$ 0	$ 898,000	$ 0	$ 898,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Trade finance | Acquired Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0
Other | TDR on accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	93,000		93,000		7,494,000
Other | TDR on accrual | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	46,000		46,000		0
Other | TDR on accrual | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	47,000		47,000		7,391,000
Other | TDR on accrual | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	0		0		103,000
Other | TDR on non-accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	124,000		124,000		73,000
Other | TDR on non-accrual | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	0		0		0
Other | TDR on non-accrual | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	124,000		124,000		73,000
Other | TDR on non-accrual | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	$ 0		$ 0		0
Consumer and other | Legacy Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	10	1
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 55,000	$ 67,000
Post-Modification	$ 0	$ 0	$ 55,000	$ 67,000
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	8	0
Balance	$ 37,000	$ 0
Consumer and other | Acquired Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of modified contracts | loan	0	0	0	0
Troubled Debt Restructuring, By Loan Class
Pre-Modification	$ 0	$ 0	$ 0	$ 0
Post-Modification	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0
Balance	$ 0	$ 0
Consumer and other | Payment concession | Legacy Loans
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan			11
Balance			$ 42,000
Consumer and other | TDR on accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured	$ 93,000		$ 93,000		$ 7,500,000
Number of modified contracts | loan			10		6

Leases - Additional Information

Leases - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)lease	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)lease	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	$ 3,649		$ 11,021
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	0		65,263
Operating lease cost	$ 3,850		$ 12,130
Weighted-average remaining lease term - operating leases	6 years 3 days		6 years 3 days
Extension options, term of extension			5 years
operating lease right-of-use assets	$ 60,862		$ 60,862		$ 0
operating lease liabilities	62,498		62,498		$ 0
Short term operating lease liability	12,600		12,600
Long term operating lease liability	$ 49,900		$ 49,900
Number of leases extended | lease			5
Lessee, Operating Lease, Number of New Leases Added | lease	0
Rent expense	$ 4,600	$ 14,200	$ 4,800	$ 13,800
Short term lease cost	0		9
Variable lease cost	875		2,411
Sublease Income	157		470
Lease, Cost	$ 4,568		$ 14,080
Weighted-average discount rate - operating leases	3.11%		3.11%
Minimum
Lessee, Lease, Description [Line Items]
Weighted-average remaining lease term - operating leases	1 year		1 year
Maximum
Lessee, Lease, Description [Line Items]
Weighted-average remaining lease term - operating leases	11 years		11 years
Extension options, term of extension			5 years

Leases - Net Lease Cost (Detail

Leases - Net Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 3,850	$ 12,130
Short term lease cost	0	9
Variable lease cost	875	2,411
Sublease income	(157)	(470)
Net lease cost	$ 4,568	$ 14,080

Leases - Other Information (Det

Leases - Other Information (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2019USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows for operating leases	$ 3,649	$ 11,021
Right-of-use assets obtained in exchange for lease liabilities, net	$ 0	$ 65,263
Weighted-average remaining lease term - operating leases	6 years 3 days	6 years 3 days
Weighted-average discount rate - operating leases	3.11%	3.11%

Leases - Maturities of Remainin

Leases - Maturities of Remaining Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Leases [Abstract]
2019	$ 3,667
2020	14,200
2021	13,496
2022	9,420
2023	7,352
2024 and thereafter	20,804
Total lease payments	68,939
Less: imputed interest	6,441
Total lease obligations	$ 62,498	$ 0

Deposits (Details)

Deposits (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Deposits Disclosure [Line Items]
Time Deposits, $250,000 or More	$ 1,860,000,000	$ 1,770,000,000
Securities pledged as collateral	0
Brokered deposits	1,250,000,000	1,570,000,000
California State Treasurer
Deposits Disclosure [Line Items]
Time Deposits, $250,000 or More	$ 300,000,000	300,000,000
Required eligible collateral pledge on outstanding deposits, minimum percentage	110.00%
Securities pledged as collateral	$ 336,600,000	336,800,000
Demand Deposits
Deposits Disclosure [Line Items]
Brokered deposits	32,500,000
Money market and NOW accounts
Deposits Disclosure [Line Items]
Brokered deposits	416,600,000	370,400,000
Time deposits
Deposits Disclosure [Line Items]
Brokered deposits	$ 797,400,000	$ 1,200,000,000

Borrowings - Narrative (Details

Borrowings - Narrative (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Percent of assets	25.00%
Maximum borrowing capacity	$ 3,830,000,000	$ 3,810,000,000
Percent outstanding advances	100.00%
Unsecured credit facility, maximum borrowing capacity	$ 95,000,000	91,000,000
Advances from Federal Home Loan Banks	625,000,000	821,280,000
Unused funds	3,180,000,000
Federal funds purchased	$ 0	$ 0
Percent of qualifying assets	95.00%
Securities pledged as collateral	$ 0
Weighted Average
Debt Instrument [Line Items]
FHLB advances, interest rate	1.92%	1.78%
Minimum
Debt Instrument [Line Items]
FHLB advances, interest rate	1.35%
Maximum
Debt Instrument [Line Items]
FHLB advances, interest rate	2.39%
Mortgage Loans on Real Estate
Debt Instrument [Line Items]
Pledged as collateral	$ 6,820,000,000	$ 6,010,000,000
Qualifying Loans
Debt Instrument [Line Items]
Asset balance used to determine maximum borrowing capacity from federal reserve bank	964,400,000
Securities Investment
Debt Instrument [Line Items]
Total available borrowing capacity	766,400,000	786,600,000
Amount outstanding	$ 0	0
Other assets
Debt Instrument [Line Items]
Investment in common trust securities		$ 3,900,000

Borrowings - Maturities of FHLB

Borrowings - Maturities of FHLB Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
2019	$ 150,000
2020	185,000
2021	145,000
2022	145,000
Total	$ 625,000	$ 821,280

Subordinated Debentures and C_3

Subordinated Debentures and Convertible Notes - Narrative (Details)	Jun. 07, 2018USD ($)$ / shares	Apr. 26, 2018USD ($)	Sep. 30, 2019USD ($)grantor_trust	Sep. 30, 2018USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)grantor_trustshares	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)shares	May 11, 2018USD ($)
Subordinated Borrowing [Line Items]
Number of wholly owned subsidiary grantor trusts | grantor_trust			9			9
Amount of pooled trust preferred securities issued			$ 126,000,000			$ 126,000,000
Right to defer consecutive payments of interest, maximum term						5 years
Proceeds from convertible notes, net of issuance fees						$ 0	$ 212,920,000
Repurchase of treasury stock				$ 21,039,000			100,000,000	$ 150,000,000
Common stock repurchased and recorded as treasury stock (in shares) | shares						0		9,002,453
Other assets
Subordinated Borrowing [Line Items]
Investment in common trust securities								$ 3,900,000
Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Unamortized Discount on Acquired Subordinated Debt			27,100,000			$ 27,100,000		28,000,000
Trust Preferred Securities Subject to Mandatory Redemption
Subordinated Borrowing [Line Items]
Amount of pooled trust preferred securities issued			$ 126,000,000			$ 126,000,000
Percent included in tier one capital, maximum			25.00%			25.00%
Excess of percent threshold included in tier two capital			25.00%			25.00%
Convertible Notes
Subordinated Borrowing [Line Items]
Aggregate principal amount issued			$ 217,500,000	217,500,000	$ 217,500,000	$ 217,500,000	217,500,000		$ 200,000,000
Interest rate									2.00%
Additional face amount issued as part of initial offering over-allotment option	$ 17,500,000
Initial conversion rate	0.0450760		0.0450760
Initial conversion price (in dollars per share) | $ / shares	$ 22.18
Premium percentage to closing stock price on date of pricing of the notes	22.50%
Call option, percentage of principal amount in cash	100.00%
Repurchase or put option, percentage of principal amount in cash	100.00%
Amount of proceeds from convertible notes authorized for repurchase of common stock	$ 100,000,000	$ 100,000,000
Proceeds from convertible notes, net of issuance fees	213,200,000
Proceeds down-streamed to the Bank as equity	113,200,000
Repurchase of treasury stock	$ 76,000,000				$ 24,000,000			$ 150,000,000
Closing price of common stock (in dollars per share) | $ / shares	$ 18.11
Amortization/ Capitalization Period	5 years					5 years		5 years
Interest expense on convertible notes			$ 2,300,000	$ 2,300,000		$ 6,900,000	$ 3,500,000
Discount Rate | Convertible Notes
Subordinated Borrowing [Line Items]
Discount rate	0.0425

Subordinated Debentures and C_4

Subordinated Debentures and Convertible Notes - Summary of Trust Preferred Securities and Debentures (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 126,000,000
Carrying Value of Debentures	102,755,000	$ 101,929,000
Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	126,000,000
Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 102,755,000	$ 101,900,000
Nara Capital Trust III
Subordinated Borrowing [Line Items]
Current Rate	5.27%
Nara Capital Trust III | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 5,000,000
Nara Capital Trust III | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 5,155,000
Nara Statutory Trust IV
Subordinated Borrowing [Line Items]
Current Rate	5.15%
Nara Statutory Trust IV | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 5,000,000
Nara Statutory Trust IV | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 5,155,000
Nara Statutory Trust V
Subordinated Borrowing [Line Items]
Current Rate	5.09%
Nara Statutory Trust V | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 10,000,000
Nara Statutory Trust V | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 10,310,000
Nara Statutory Trust VI
Subordinated Borrowing [Line Items]
Current Rate	3.77%
Nara Statutory Trust VI | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 8,000,000
Nara Statutory Trust VI | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 8,248,000
Center Capital Trust I
Subordinated Borrowing [Line Items]
Current Rate	5.15%
Center Capital Trust I | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 18,000,000
Center Capital Trust I | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 14,182,000
Wilshire Trust II
Subordinated Borrowing [Line Items]
Current Rate	3.93%
Wilshire Trust II | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 20,000,000
Wilshire Trust II | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 15,688,000
Wilshire Trust III
Subordinated Borrowing [Line Items]
Current Rate	3.52%
Wilshire Trust III | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 15,000,000
Wilshire Trust III | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 11,087,000
Wilshire Trust IV
Subordinated Borrowing [Line Items]
Current Rate	3.50%
Wilshire Trust IV | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 25,000,000
Wilshire Trust IV | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 17,970,000
Saehan Capital Trust I
Subordinated Borrowing [Line Items]
Current Rate	3.72%
Saehan Capital Trust I | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 20,000,000
Saehan Capital Trust I | Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Debentures	$ 14,960,000

Subordinated Debentures and C_5

Subordinated Debentures and Convertible Notes - Schedule of Convertible Debt (Details) - USD ($) $ in Thousands	Jun. 07, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Debt Instrument [Line Items]
Repurchase of treasury stock			$ 21,039			$ 100,000	$ 150,000
Convertible Notes
Debt Instrument [Line Items]
Repurchase of treasury stock	$ 76,000			$ 24,000			$ 150,000
Interest expense on convertible notes		$ 2,300	$ 2,300		$ 6,900	$ 3,500
Amortization/ Capitalization Period	5 years				5 years		5 years
Gross Carrying Amount
Convertible notes principal balance		217,500			$ 217,500		$ 217,500
Discount		(21,880)			(21,880)		(21,880)
Issuance costs to be capitalized		(4,119)			(4,119)		(4,119)
Carrying balance of convertible notes		191,501			191,501		191,501
Accumulated Amortization / Capitalization
Discount		5,614			5,614		2,544
Issuance costs to be capitalized		1,096			1,096		498
Carrying balance of convertible notes		6,710			6,710		3,042
Carrying Amount
Convertible notes principal balance		217,500			217,500		217,500
Discount		(16,266)			(16,266)		(19,336)
Issuance costs to be capitalized		(3,023)			(3,023)		(3,621)
Carrying balance of convertible notes		$ 198,211			$ 198,211		$ 194,543

Derivative Financial Instrume_3

Derivative Financial Instruments (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Interest rate lock commitments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 7,700	$ 874
Other liabilities | Not Designated as Hedging Instrument | Correspondent Banks | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted average remaining term (years)	7 years	6 years 4 months 24 days
Estimated fair value	$ (14,558)	$ (868)
Notional amount	$ 360,113	$ 36,972
Derivative, Average Fixed Interest Rate	4.28%	5.12%
Derivative, Average Variable Interest Rate	4.26%	4.56%
Other liabilities | Not Designated as Hedging Instrument | Customers | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted average remaining term (years)	3 years 2 months 12 days	6 years 9 months 18 days
Estimated fair value	$ (35)	$ (6,191)
Notional amount	$ 16,663	$ 237,916
Derivative, Average Fixed Interest Rate	3.91%	4.36%
Derivative, Average Variable Interest Rate	4.62%	4.69%
Other assets | Not Designated as Hedging Instrument | Correspondent Banks | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted average remaining term (years)	3 years 2 months 12 days	6 years 9 months 18 days
Estimated fair value	$ 35	$ 6,191
Notional amount	$ 16,663	$ 237,916
Derivative, Average Fixed Interest Rate	3.91%	4.36%
Derivative, Average Variable Interest Rate	4.62%	4.69%
Other assets | Not Designated as Hedging Instrument | Customers | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Weighted average remaining term (years)	7 years	6 years 4 months 24 days
Estimated fair value	$ 14,558	$ 868
Notional amount	$ 360,113	$ 36,972
Derivative, Average Fixed Interest Rate	4.28%	4.56%
Derivative, Average Variable Interest Rate	4.26%	5.12%

Derivative Financial Instrume_4

Derivative Financial Instruments - Summary of Derivative Notional Amounts and Fair Values (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Interest rate lock commitments
Derivative [Line Items]
Notional amount, derivative asset	$ 7,010	$ 874
Fair value, derivative asset	48	10
Notional amount, derivative liability	658	0
Fair value, derivative liability	(3)	0
Forward sale contracts related to mortgage banking | Short
Derivative [Line Items]
Notional amount, derivative asset	4,785	0
Fair value, derivative asset	23	0
Notional amount, derivative liability	2,883	874
Fair value, derivative liability	$ (4)	$ 3

Commitments and contingencies_2

Commitments and contingencies (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Supply Commitment [Line Items]
Loss contingencies for all legal claims	$ 285	$ 755
Commitments to extend credit
Supply Commitment [Line Items]
Commitments and letters of credit	1,743,145	1,712,032
Standby letters of credit
Supply Commitment [Line Items]
Commitments and letters of credit	111,665	69,763
Other letters of credit
Supply Commitment [Line Items]
Commitments and letters of credit	39,166	65,822
Commitments to fund investments in affordable housing partnerships
Supply Commitment [Line Items]
Commitments and letters of credit	$ 32,635	$ 46,507

Goodwill, Intangible Assets, _3

Goodwill, Intangible Assets, and Servicing Assets - Intangible Assets (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 464,450,000		$ 464,450,000		$ 464,450,000
Goodwill impairment	0		0
Gross Amount	25,605,000		25,605,000
Accumulated Amortization	(13,215,000)		(13,215,000)		(11,544,000)
Carrying Amount	12,390,000		12,390,000		14,061,000
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization expense related to core deposit intangible assets	557,000	$ 615,000	$ 1,700,000	$ 1,800,000
Center Financial acquisition | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period			7 years
Gross Amount	4,100,000		$ 4,100,000
Accumulated Amortization	(4,100,000)		(4,100,000)		(4,100,000)
Carrying Amount	0		$ 0		0
Pacific International Bank acquisition | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period			7 years
Gross Amount	604,000		$ 604,000
Accumulated Amortization	(597,000)		(597,000)		(579,000)
Carrying Amount	7,000		$ 7,000		25,000
Foster Bankshares acquisition | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period			10 years
Gross Amount	2,763,000		$ 2,763,000
Accumulated Amortization	(2,063,000)		(2,063,000)		(1,893,000)
Carrying Amount	700,000		$ 700,000		870,000
Wilshire Bancorp acquisition | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period			10 years
Gross Amount	18,138,000		$ 18,138,000
Accumulated Amortization	(6,455,000)		(6,455,000)		(4,972,000)
Carrying Amount	$ 11,683,000		$ 11,683,000		$ 13,166,000
Minimum | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period			7 years
Maximum | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period			10 years

Goodwill, Intangible Assets, _4

Goodwill, Intangible Assets, and Servicing Assets - Servicing Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of period	$ 19,997	$ 25,050	$ 23,132	$ 24,710	$ 24,710
Additions through originations of servicing assets	437	1,503	1,383	4,819
Amortization	(2,569)	(2,199)	(6,650)	(5,845)
Adjustments	0	0	0	670
Balance at end of period	17,865	$ 24,354	17,865	$ 24,354	23,132
Principal balances of loans serviced for other institutions	$ 1,460,000		$ 1,460,000		$ 1,550,000
SBA Servicing Assets: Weighted-average discount rate			10.52%		11.23%
SBA Servicing Assets: Constant prepayment rate			14.02%		11.09%
Mortgage Servicing Assets: Weighted-average discount rate			9.13%		10.25%
Mortgage Servicing Assets: Constant prepayment rate			9.78%		7.13%

Income Taxes Narrative (Details

Income Taxes Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax provision	$ 14,566,000	$ 15,461,000	$ 43,261,000	$ 49,823,000
Pretax income	$ 57,158,000	$ 61,839,000	$ 171,292,000	$ 194,963,000
Effective income tax rate	25.48%	25.00%	25.26%	25.56%
Unrecognized tax benefits	$ 2,300,000		$ 2,300,000		$ 2,300,000
Interest accrued	544,000		544,000		470,000
Penalties accrued	0		0		$ 0
Decrease in unrecognized tax benefits is reasonably possible	$ 2,300,000		$ 2,300,000

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value, Recurring (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)	Dec. 31, 2018USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Costs to sell percentage	8.50%
Assets:
Securities available for sale, at fair value	$ 1,772,322	$ 1,846,265
Equity investments with readily determinable fair value	49,055	49,835
Mortgage banking derivatives	71
Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	801,071	895,122
Residential
Assets:
Securities available for sale, at fair value	332,123	402,605
Commercial
Assets:
Securities available for sale, at fair value	563,108	469,126
Corporate securities
Assets:
Securities available for sale, at fair value	3,898	3,826
Municipal securities
Assets:
Securities available for sale, at fair value	72,122	75,586
Recurring basis | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	801,071	895,122
Recurring basis | Residential
Assets:
Securities available for sale, at fair value	332,123	402,605
Recurring basis | Commercial
Assets:
Securities available for sale, at fair value	563,108	469,126
Recurring basis | Corporate securities
Assets:
Securities available for sale, at fair value	3,898	3,826
Recurring basis | Municipal securities
Assets:
Securities available for sale, at fair value	72,122	75,586
Recurring basis | Equity investments
Assets:
Equity investments with readily determinable fair value	22,228
Recurring basis | Equity investments with readily determinable fair value
Assets:
Securities available for sale, at fair value	23,405
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Interest rate swaps	0	0
Mortgage banking derivatives	0	0
Liabilities:
Interest rate swaps	0	0
Mortgage banking derivatives	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Residential
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate securities
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal securities
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity investments
Assets:
Equity investments with readily determinable fair value	22,228
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity investments with readily determinable fair value
Assets:
Securities available for sale, at fair value	23,405
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Interest rate swaps	14,593	7,059
Mortgage banking derivatives	71	10
Liabilities:
Interest rate swaps	14,593	7,059
Mortgage banking derivatives	7	3
Recurring basis | Significant Other Observable Inputs (Level 2) | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	801,071	895,122
Recurring basis | Significant Other Observable Inputs (Level 2) | Residential
Assets:
Securities available for sale, at fair value	332,123	402,605
Recurring basis | Significant Other Observable Inputs (Level 2) | Commercial
Assets:
Securities available for sale, at fair value	563,108	469,126
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate securities
Assets:
Securities available for sale, at fair value	3,898	3,826
Recurring basis | Significant Other Observable Inputs (Level 2) | Municipal securities
Assets:
Securities available for sale, at fair value	71,014	74,527
Recurring basis | Significant Other Observable Inputs (Level 2) | Equity investments
Assets:
Equity investments with readily determinable fair value	0
Recurring basis | Significant Other Observable Inputs (Level 2) | Equity investments with readily determinable fair value
Assets:
Securities available for sale, at fair value	0
Recurring basis | Significant Unobservable Inputs (Level 3)
Assets:
Interest rate swaps	0	0
Mortgage banking derivatives	0	0
Liabilities:
Interest rate swaps	0	0
Mortgage banking derivatives	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Residential
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Commercial
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Corporate securities
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Municipal securities
Assets:
Securities available for sale, at fair value	1,108	1,059
Recurring basis | Significant Unobservable Inputs (Level 3) | Equity investments
Assets:
Equity investments with readily determinable fair value	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Equity investments with readily determinable fair value
Assets:
Securities available for sale, at fair value	0
Recurring basis | Estimated Fair Value
Assets:
Interest rate swaps	14,593	7,059
Mortgage banking derivatives		10
Liabilities:
Interest rate swaps	14,593	7,059
Mortgage banking derivatives	$ 7	$ 3
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Costs to sell percentage	8.50%
Discount Rate | Accounts Receivable | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.20
Discount Rate | Accounts Receivable | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.60
Discount Rate | Inventories | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.50
Discount Rate | Inventories | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.70

Fair Value Measurements - Rollf

Fair Value Measurements - Rollforward of Level 3 Assets (Details) - Municipal securities - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 1,087	$ 1,065	$ 1,059	$ 1,108
Change in fair value included in other comprehensive income (loss)	21	(22)	49	(65)
Ending Balance	$ 1,108	$ 1,043	$ 1,108	$ 1,043

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets Measured at Fair Value, Non-Recurring (Details) - Non-recurring basis - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Real estate loans
Assets:
Assets	$ 10,304	$ 9,379
Commercial business
Assets:
Assets	8,828	9,951
Consumer
Assets:
Assets		66
Loans held for sale, net [Member]
Assets:
Assets	25,988
OREO
Assets:
Assets	17,220	5,659
Quoted Prices in Active Markets for Identical Assets (Level 1) | Real estate loans
Assets:
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial business
Assets:
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer
Assets:
Assets		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Loans held for sale, net [Member]
Assets:
Assets	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | OREO
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | Real estate loans
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | Commercial business
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | Consumer
Assets:
Assets		0
Significant Other Observable Inputs (Level 2) | Loans held for sale, net [Member]
Assets:
Assets	25,988
Significant Other Observable Inputs (Level 2) | OREO
Assets:
Assets	0	0
Significant Unobservable Inputs (Level 3) | Real estate loans
Assets:
Assets	10,304	9,379
Significant Unobservable Inputs (Level 3) | Commercial business
Assets:
Assets	8,828	9,951
Significant Unobservable Inputs (Level 3) | Consumer
Assets:
Assets		66
Significant Unobservable Inputs (Level 3) | Loans held for sale, net [Member]
Assets:
Assets	0
Significant Unobservable Inputs (Level 3) | OREO
Assets:
Assets	$ 17,220	$ 5,659

Fair Value Measurements - Total

Fair Value Measurements - Total Net Gains Losses on Assets Measured at Fair Value on a Non-Recurring Basis (Details) - Non-recurring basis - Change during period - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	$ (891)	$ (14)	$ 682	$ (4,620)
Commercial business
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	1,297	89	(2,270)	703
Trade finance
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	333	268	0	43
Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	(276)	(308)	(904)	(834)
Loans held for sale, net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	(599)	0	(599)	0
OREO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	$ 1,277	$ 418	$ 1,112	$ 682

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financial Assets:
Equity investments without readily determinable fair values	$ 26,800	$ 26,400
Level 1 | Carrying Amount
Financial Assets:
Cash and cash equivalents	549,356	459,606
Financial Liabilities:
Convertible notes, net	198,211
Level 1 | Estimated Fair Value
Financial Assets:
Cash and cash equivalents	549,356	459,606
Financial Liabilities:
Convertible notes, net	200,124
Level 2/3 | Carrying Amount
Financial Assets:
Accrued interest receivable	29,743	32,225
Level 2/3 | Carrying Amount | Other investments
Financial Assets:
Interest bearing deposits in other financial institutions	30,387	29,409
Level 2/3 | Estimated Fair Value
Financial Assets:
Accrued interest receivable	29,743	32,225
Level 2/3 | Estimated Fair Value | Other investments
Financial Assets:
Interest bearing deposits in other financial institutions	30,469	29,374
Level 2 | Carrying Amount
Financial Assets:
Equity investments without readily determinable fair values	26,827	26,430
Loans held for sale	29,627	25,128
Customers’ liabilities on acceptances	1,125	2,281
Financial Liabilities:
Noninterest bearing deposits	3,033,371	3,022,633
Saving and other interest bearing demand deposits	4,011,728	3,262,399
Time deposits	5,189,651	5,870,624
FHLB advances	625,000	821,280
Convertible debt		194,543
Subordinated debentures	102,755	101,929
Accrued interest payable	38,197	31,374
Acceptances outstanding	1,125	2,281
Level 2 | Estimated Fair Value
Financial Assets:
Equity investments without readily determinable fair values	26,827	26,430
Loans held for sale	29,722	25,943
Customers’ liabilities on acceptances	1,125	2,281
Financial Liabilities:
Noninterest bearing deposits	3,033,371	3,022,633
Saving and other interest bearing demand deposits	4,011,728	3,262,399
Time deposits	5,217,768	5,889,030
FHLB advances	629,111	810,812
Convertible debt		180,525
Subordinated debentures	115,225	116,542
Accrued interest payable	38,197	31,374
Acceptances outstanding	1,125	2,281
Level 3 | Carrying Amount
Financial Assets:
Loans receivable—net	12,010,800	12,005,558
Servicing assets, net	17,865	23,132
Level 3 | Estimated Fair Value
Financial Assets:
Loans receivable—net	11,923,715	11,913,906
Servicing assets, net	$ 19,744	$ 24,762

Stockholders' Equity - Discussi

Stockholders' Equity - Discussion of Equity and Warrants (Details) - USD ($)	Jun. 07, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Jun. 30, 2019	Sep. 20, 2018	Jun. 30, 2018	Apr. 26, 2018	Dec. 31, 2017
Equity [Abstract]
Total stockholders’ equity		$ 2,031,284,000	$ 1,904,580,000	$ 1,904,580,000	$ 2,031,284,000	$ 1,904,580,000	$ 1,903,211,000	$ 1,995,172,000		$ 1,905,676,000		$ 1,928,255,000
Class of Warrant or Right [Line Items]
Share repurchase program, authorized amount								50,000,000	$ 50,000,000		$ 100,000,000
Common stock repurchased and recorded as treasury stock (in shares)					0		9,002,453
Repurchase of treasury stock			$ 21,039,000			$ 100,000,000	$ 150,000,000
Dividends paid (in dollars per share)		$ 0.14	$ 0.14		$ 0.42	$ 0.40
Convertible Notes
Class of Warrant or Right [Line Items]
Equity component of convertible notes			$ 21,900,000	21,900,000		$ 21,900,000
Issuance costs from convertible notes allocated to equity			461,000	461,000		461,000
Repurchase of treasury stock	$ 76,000,000			24,000,000			150,000,000
Additional paid-in capital
Equity [Abstract]
Total stockholders’ equity		$ 1,426,666,000	1,422,685,000	$ 1,422,685,000	$ 1,426,666,000	$ 1,422,685,000	$ 1,423,405,000	$ 1,425,262,000		$ 1,421,679,000		$ 1,405,014,000
Class of Warrant or Right [Line Items]
Equity component of convertible notes after issuance costs			21,400,000
Convertible debt tax adjustment, reduction to additional paid-in capital			$ 6,400,000

Stockholders' Equity - Changes

Stockholders' Equity - Changes in Accumulated Other Comprehensive (Loss) Income (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Balance at beginning of period	$ 7,423,000	$ (45,122,000)	$ (32,705,000)	$ (21,781,000)	$ (21,781,000)
Unrealized gain (loss) on securities available for sale	14,160,000	(13,114,000)	71,349,000	(47,012,000)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	(153,000)		(282,000)	0
Tax effect	(4,157,000)	3,915,000	(21,089,000)	14,191,000
Total other comprehensive income (loss)	9,850,000	(9,199,000)	49,978,000	(32,821,000)
Reclassification to retained earnings per ASU 2016-01	0	0	0	281,000
Balance at end of period	17,273,000	(54,321,000)	$ 17,273,000	(54,321,000)	$ (32,705,000)
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Treasury Stock, Shares, Acquired			0		9,002,453
Reclassification adjustments for net gains realized in net income	153,000	0	$ 282,000	0
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01						$ (188,000)
Other reclassifications out of accumulated other comprehensive (loss) income	0	0	0	0
Treasury Stock, Value, Acquired, Cost Method		21,039,000		100,000,000	$ 150,000,000
Accumulated other comprehensive (loss) income, net
Equity [Abstract]
Total other comprehensive income (loss)	$ 9,850,000	$ (9,199,000)	$ 49,978,000	$ (32,821,000)
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassification of unrealized losses on equity investments to retained earnings - ASU 2016-01					$ 281,000	$ 281,000

Regulatory Matters (Details)

Regulatory Matters (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Company
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier One Capital	$ 1,540,070	$ 1,458,344
Common Equity Tier One Capital Ratio	11.89%	11.44%
Total capital (to risk-weighted assets), Amount
Total Capital, Actual	$ 1,733,442	$ 1,649,664
Total Capital, Required For Capital Adequacy Purposes	1,036,155	1,019,952
Required for Capital Adequacy with Capital Buffer	1,359,953	1,259,004
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Actual (Risk Based)	1,638,924	1,556,371
Tier I Capital, Required For Capital Adequacy Purposes	777,116	764,964
Tier 1 Capital, Required for Capital Adequacy with Capital Buffer	1,100,915	1,004,015
Tier I capital (to average assets), Amount
Tier I Capital, Actual (Leverage)	1,638,924	1,556,371
Tier I Capital, Required For Capital Adequacy Purposes	$ 586,610	$ 590,176
Total capital and Tier I capital (to risk-weighted assets), Ratio
Total Capital (to Risk Weighted Assets), Actual	13.38%	12.94%
Total Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes	8.00%	8.00%
Total Capital (to Risk Weighted assets), Minimum Required for Capital Adequacy with Capital Buffer	10.50%	9.875%
Tier I Capital (to Risk Weighted Assets), Actual (Risk Based)	12.65%	12.21%
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	6.00%	6.00%
Tier 1 Capital (to Risk Weighted Assets), Minimum Required for Capital Adequacy with Capital Buffer	8.50%	7.875%
Tier I capital (to average assets), Ratio
Tier I Capital (to Average Assets), Actual (Leverage)	11.18%	10.55%
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage)	4.00%	4.00%
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier One Capital	$ 1,814,882	$ 1,737,092
Common Equity Tier One Capital Ratio	14.01%	13.63%
Total capital (to risk-weighted assets), Amount
Total Capital, Actual	$ 1,909,400	$ 1,830,385
Total Capital, Required For Capital Adequacy Purposes	1,036,077	1,019,910
Required for Capital Adequacy with Capital Buffer	1,359,851	1,258,951
Required To Be Well Capitalized under Prompt Corrective Action Provisions	1,295,096	1,274,887
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Actual (Risk Based)	1,814,882	1,737,092
Tier I Capital, Required For Capital Adequacy Purposes	777,058	764,932
Tier 1 Capital, Required for Capital Adequacy with Capital Buffer	906,567	812,740
Tier I Capital, Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	1,036,077	1,019,910
Tier I capital (to average assets), Amount
Tier I Capital, Actual (Leverage)	1,814,882	1,737,092
Tier I Capital, Required For Capital Adequacy Purposes	586,750	590,639
Tier I Capital, Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Leverage)	$ 733,438	$ 738,299
Total capital and Tier I capital (to risk-weighted assets), Ratio
Total Capital (to Risk Weighted Assets), Actual	14.74%	14.36%
Total Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes	8.00%	8.00%
Total Capital (to Risk Weighted assets), Minimum Required for Capital Adequacy with Capital Buffer	10.50%	9.875%
Total Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions	10.00%	10.00%
Tier I Capital (to Risk Weighted Assets), Actual (Risk Based)	14.01%	13.63%
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	6.00%	6.00%
Tier 1 Capital (to Risk Weighted Assets), Minimum Required for Capital Adequacy with Capital Buffer	8.50%	7.875%
Common Equity Tier One Capital Required to be Well-Capitalized	$ 841,813	$ 828,677
Tier I Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	8.00%	8.00%
Tier I capital (to average assets), Ratio
Tier I Capital (to Average Assets), Actual (Leverage)	12.37%	11.76%
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage)	4.00%	4.00%
Tier I Capital (to Average Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Leverage)	5.00%	5.00%
Common Equity Tier 1 | Company
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Required For Capital Adequacy Purposes	$ 582,837	$ 573,723
Tier 1 Capital, Required for Capital Adequacy with Capital Buffer	$ 906,636	$ 812,774
Total capital and Tier I capital (to risk-weighted assets), Ratio
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	4.50%	4.50%
Tier 1 Capital (to Risk Weighted Assets), Minimum Required for Capital Adequacy with Capital Buffer	7.00%	6.375%
Common Equity Tier 1 | Bank
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Required For Capital Adequacy Purposes	$ 582,793	$ 573,669
Tier 1 Capital, Required for Capital Adequacy with Capital Buffer	$ 906,567	$ 812,740
Total capital and Tier I capital (to risk-weighted assets), Ratio
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	4.50%	4.50%
Tier 1 Capital (to Risk Weighted Assets), Minimum Required for Capital Adequacy with Capital Buffer	7.00%	6.375%
Tier I Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	6.50%	6.50%

Revenue Recognition - Service C

Revenue Recognition - Service Charged on Deposit Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	$ 4,690	$ 4,569	$ 13,423	$ 13,983
Wire transfer fees	1,058	1,227	3,458	3,684
Wire transfer fees
Disaggregation of Revenue [Line Items]
Wire transfer fees	963	1,109	3,063	3,338
Foreign exchange fees
Disaggregation of Revenue [Line Items]
Wire transfer fees	95	118	395	346
Noninterest Bearing Deposits
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	4,671	4,553	13,371	13,938
Noninterest Bearing Deposits | Monthly service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	395	455	1,224	1,340
Noninterest Bearing Deposits | Customer analysis charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	2,194	1,912	5,788	5,972
Noninterest Bearing Deposits | NSF charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	1,887	1,961	5,754	5,947
Noninterest Bearing Deposits | Other service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	195	225	605	679
Interest-bearing Deposits | Monthly service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	$ 19	$ 16	$ 52	$ 45

Revenue Recognition - OREO Inco

Revenue Recognition - OREO Income (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Gains (losses) on sales of OREO	$ (1)	$ 208	$ (14)	$ 358