Hope Bancorp (HOPE) 10-Q 4 Nov 20 2020 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2020	Oct. 28, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
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,
Entity Address, Address Line Two	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
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	HOPE
Security Exchange Name	NASDAQ
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 Company	false
Entity Common Stock, Shares Outstanding (in shares)		123,261,443
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001128361
Current Fiscal Year End Date	--12-31

Consolidated Statements Of Fina

Consolidated Statements Of Financial Condition - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Cash and cash equivalents:
Cash and due from banks	$ 315,336	$ 283,130
Interest bearing cash in other banks	313,797	415,437
Total cash and cash equivalents	629,133	698,567
Interest bearing deposits in other financial institutions	30,345	29,162
Securities available for sale, at fair value	2,060,991	1,715,987
Equity investments	49,710	49,090
Loans held for sale, at the lower of cost or fair value	9,170	54,271
Loans receivable, net of allowance for credit losses of $179,849 and $94,144 at September 30, 2020 and December 31, 2019, respectively	12,940,376	12,181,863
Other real estate owned (“OREO”), net	18,410	24,091
Federal Home Loan Bank (“FHLB”) stock, at cost	17,250	19,407
Premises and equipment, net	49,552	52,012
Accrued interest receivable	57,989	30,772
Deferred tax assets, net	43,380	31,663
Customers’ liabilities on acceptances	880	1,117
Bank owned life insurance (“BOLI”)	77,388	76,339
Investments in affordable housing partnerships	73,300	82,600
Operating lease right-of-use assets, net	52,308	58,593
Goodwill	464,450	464,450
Core deposit intangible assets, net	10,239	11,833
Servicing assets, net	13,718	16,417
Other assets	135,178	69,206
Total assets	16,733,767	15,667,440
Deposits:
Noninterest bearing	4,488,529	3,108,687
Interest bearing:
Money market and NOW accounts	4,763,893	3,985,556
Savings deposits	308,943	274,151
Time deposits	4,446,991	5,158,970
Total deposits	14,008,356	12,527,364
FHLB advances	200,000	625,000
Convertible notes, net	203,270	199,458
Subordinated debentures, net	103,889	103,035
Accrued interest payable	21,991	33,810
Acceptances outstanding	880	1,117
Operating lease liabilities	54,798	60,506
Commitments to fund investments in affordable housing partnerships	16,975	28,481
Other liabilities	83,047	52,658
Total liabilities	14,693,206	13,631,429
STOCKHOLDERS’ EQUITY:
Common stock, $0.001 par value; 150,000,000 authorized shares: issued and outstanding 135,922,341 and 123,260,760 shares, respectively, at September 30, 2020, and issued and outstanding 135,702,090 and 125,756,543 shares, respectively, at December 31, 2019	136	136
Additional paid-in capital	1,432,773	1,428,066
Retained earnings	774,970	762,480
Treasury stock, at cost; 12,661,581 and 9,945,547 shares at September 30, 2020 and December 31, 2019	(200,000)	(163,820)
Accumulated other comprehensive income, net	32,682	9,149
Total stockholders’ equity	2,040,561	2,036,011
Total liabilities and stockholders’ equity	$ 16,733,767	$ 15,667,440

Consolidated Statements Of Fi_2

Consolidated Statements Of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for credit losses	$ 179,849	$ 94,144
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	135,922,341	135,702,090
Common stock, shares outstanding (in shares)	123,260,760	125,756,543
Treasury stock, at cost, shares repurchased (in shares)	12,661,581	9,945,547

Consolidated Statements Of Inco

Consolidated Statements Of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
INTEREST INCOME:
Interest and fees on loans	$ 134,430	$ 158,115	$ 422,850	$ 474,878
Interest on securities	9,848	11,373	30,348	35,558
Interest on other investments	942	2,929	3,951	8,577
Total interest income	145,220	172,417	457,149	519,013
INTEREST EXPENSE:
Interest on deposits	22,871	49,057	93,435	144,730
Interest on FHLB advances	1,323	3,112	6,208	9,110
Interest on other borrowings and convertible notes	3,389	3,990	10,764	12,086
Total interest expense	27,583	56,159	110,407	165,926
NET INTEREST INCOME BEFORE PROVISION FOR CREDIT LOSSES	117,637	116,258	346,742	353,087
PROVISION FOR CREDIT LOSSES	22,000	2,100	67,500	6,300
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	95,637	114,158	279,242	346,787
NONINTEREST INCOME:
Service fees on deposit accounts	2,736	4,690	9,452	13,423
International service fees	987	1,193	2,443	3,146
Loan servicing fees, net	772	189	2,243	1,656
Wire transfer fees	892	1,058	2,710	3,458
Swap fees	434	1,926	2,450	2,348
Net gains on sales of other loans	2,853	804	6,386	2,611
Net gains on sales of securities available for sale	7,531	153	7,531	282
Other income and fees	1,308	2,982	8,802	9,780
Total noninterest income	17,513	12,995	42,017	36,704
NONINTEREST EXPENSE:
Salaries and employee benefits	40,659	41,607	122,011	121,333
Occupancy	7,264	7,703	21,717	23,219
Furniture and equipment	4,513	3,851	13,426	11,323
Advertising and marketing	1,601	2,377	4,589	6,684
Data processing and communications	2,204	2,821	7,109	8,364
Professional fees	1,513	5,241	6,323	16,580
Investments in affordable housing partnership expenses	3,876	2,334	9,300	7,601
FDIC assessments	1,167	0	4,378	3,110
Credit related expenses	1,793	1,031	4,816	3,258
OREO expense (income), net	1,770	(743)	3,951	(812)
FHLB prepayment penalty	3,584	0	3,584	0
Other	3,462	3,773	11,372	11,539
Total noninterest expense	73,406	69,995	212,576	212,199
INCOME BEFORE INCOME TAXES	39,744	57,158	108,683	171,292
INCOME TAX PROVISION	9,254	14,566	25,487	43,261
NET INCOME	$ 30,490	$ 42,592	$ 83,196	$ 128,031
EARNINGS PER COMMON SHARE
Basic (in dollars per share)	$ 0.25	$ 0.34	$ 0.67	$ 1.01
Diluted (in dollars per share)	$ 0.25	$ 0.34	$ 0.67	$ 1.01

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 30,490	$ 42,592	$ 83,196	$ 128,031
Other comprehensive (loss) income:
Change in unrealized net holding (losses) gains on securities available for sale	(303)	14,160	41,820	71,349
Change in unrealized net holding (losses) gains on interest rate swaps used in cash flow hedges	54	0	(796)	0
Reclassification adjustments for net gains realized in net income	(7,510)	(153)	(7,649)	(282)
Tax effect	2,292	(4,157)	(9,842)	(21,089)
Other comprehensive (loss) income, net of tax	(5,467)	9,850	23,533	49,978
Total comprehensive income	$ 25,023	$ 52,442	$ 106,729	$ 178,009

Consolidated Statements Of Chan

Consolidated Statements Of Changes In Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Retained earnings	Treasury stock	Accumulated other comprehensive income, net
Balance at beginning of period (in shares) at Dec. 31, 2018		126,639,912
Balance at beginning of period at Dec. 31, 2018	$ 1,903,211	$ 136	$ 1,423,405	$ 662,375	$ (150,000)	$ (32,705)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)		58,013
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations	3		3
Stock-based compensation	3,258		3,258
Cash dividends declared on common stock	(53,197)			(53,197)
Comprehensive income:
Net income	128,031			128,031
Other comprehensive income (loss)	49,978					49,978
Balance at end of period (in shares) at Sep. 30, 2019		126,697,925
Balance at end of period at Sep. 30, 2019	2,031,284	$ 136	1,426,666	737,209	(150,000)	17,273
Balance at beginning of period (in shares) at Dec. 31, 2018		126,639,912
Balance at beginning of period at Dec. 31, 2018	$ 1,903,211	$ 136	1,423,405	662,375	(150,000)	(32,705)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Balance at end of period (in shares) at Dec. 31, 2019		125,756,543
Balance at end of period at Dec. 31, 2019	$ 2,036,011	$ 136	1,428,066	762,480	(163,820)	9,149
Balance at beginning of period (in shares) at Jun. 30, 2019		126,673,822
Balance at beginning of period at Jun. 30, 2019	1,995,172	$ 136	1,425,262	712,351	(150,000)	7,423
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)		24,103
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations	0		0
Stock-based compensation	1,404		1,404
Cash dividends declared on common stock	(17,734)			(17,734)
Comprehensive income:
Net income	42,592			42,592
Other comprehensive income (loss)	9,850					9,850
Balance at end of period (in shares) at Sep. 30, 2019		126,697,925
Balance at end of period at Sep. 30, 2019	2,031,284	$ 136	1,426,666	737,209	(150,000)	17,273
Balance at beginning of period (in shares) at Dec. 31, 2019		125,756,543
Balance at beginning of period at Dec. 31, 2019	2,036,011	$ 136	1,428,066	762,480	(163,820)	9,149
Increase (Decrease) in Stockholders' Equity [Roll Forward]
CECL day 1 impact	(26,729)			(26,729)
CECL day 1 impact tax adjustment	$ 7,947			7,947
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)		220,251
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations	$ 0		0
Stock-based compensation	4,707		4,707
Cash dividends declared on common stock	(51,924)			(51,924)
Comprehensive income:
Net income	83,196			83,196
Other comprehensive income (loss)	23,533					23,533
Repurchase of treasury stock, (in shares)		(2,716,034)
Repurchase of treasury stock	(36,180)				(36,180)
Balance at end of period (in shares) at Sep. 30, 2020		123,260,760
Balance at end of period at Sep. 30, 2020	2,040,561	$ 136	1,432,773	774,970	(200,000)	32,682
Balance at beginning of period (in shares) at Jun. 30, 2020		123,239,276
Balance at beginning of period at Jun. 30, 2020	2,030,776	$ 136	1,430,757	761,734	(200,000)	38,149
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)		21,484
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations	0		0
Stock-based compensation	2,016		2,016
Cash dividends declared on common stock	(17,254)			(17,254)
Comprehensive income:
Net income	30,490			30,490
Other comprehensive income (loss)	$ (5,467)					(5,467)
Repurchase of treasury stock, (in shares)	0
Balance at end of period (in shares) at Sep. 30, 2020		123,260,760
Balance at end of period at Sep. 30, 2020	$ 2,040,561	$ 136	$ 1,432,773	$ 774,970	$ (200,000)	$ 32,682

Consolidated Statements Of Ch_2

Consolidated Statements Of Changes In Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividends declared on common stock (in dollars per share)	$ 0.14	$ 0.14	$ 0.42	$ 0.42

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 83,196	$ 128,031
Adjustments to reconcile net income to net cash from operating activities:
Discount accretion, net of depreciation and amortization	5,942	2,391
Stock-based compensation expense	5,980	3,897
Provision for credit losses	67,500	6,300
Provision (credit) for unfunded loan commitments	660	(100)
Valuation adjustment of OREO	3,492	(1,125)
Net gains on sales of other loans	(6,386)	(2,611)
Earnings on BOLI	(1,049)	(1,126)
Net change in fair value of derivatives	(35)	(57)
Net losses on sale and disposal of premises and equipment	357	75
Net losses on sales of OREO	108	14
Net gains on sales and calls of securities available for sale	(7,531)	(282)
Net change in fair value of equity investments with readily determinable fair value	(542)	(1,393)
Losses on investments in affordable housing partnerships	9,088	7,523
Payment of FHLB prepayment fee	3,584	0
Net change in deferred income taxes	(13,728)	3,907
Proceeds from sales of loans held for sale	251,092	95,926
Originations of loans held for sale	(206,798)	(77,678)
Originations of servicing assets	(2,326)	(1,383)
Net change in accrued interest receivable	(27,217)	2,482
Net change in other assets	(61,023)	(27,110)
Net change in accrued interest payable	(11,819)	6,823
Net change in other liabilities	29,729	4,352
Net cash provided by operating activities	122,274	148,856
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of interest bearing deposits in other financial institutions	(19,103)	(18,130)
Redemption of interest bearing deposits in other financial institutions	17,920	17,152
Purchase of securities available for sale	(867,723)	(174,486)
Proceeds from matured, called, or paid-down securities available for sale	388,647	198,743
Proceeds from sale of securities available for sale	168,069	115,628
Proceeds from sale of equity investments	201	2,570
Proceeds from sales of other loans held for sale previously classified as held for investment	1,053	83,599
Net change in loans receivable	(832,267)	(106,064)
Proceeds from sales of OREO	2,458	3,197
Purchase of FHLB stock	(1,346)	(155)
Redemption of FHLB stock	3,503	6,210
Purchase of premises and equipment	(4,048)	(5,190)
Proceeds from BOLI death benefits	0	1,363
Investments in affordable housing partnerships	(11,506)	(13,804)
Net cash (used in) provided by investing activities	(1,154,142)	110,633
CASH FLOWS FROM FINANCING ACTIVITIES
Net change in deposits	1,480,992	79,094
Proceeds from FHLB advances	1,010,000	565,000
Repayment of FHLB advances	(1,438,584)	(760,000)
Purchase of treasury stock	(36,777)	0
Cash dividends paid on common stock	(51,924)	(53,197)
Taxes paid in net settlement of restricted stock	(1,273)	(639)
Issuance of additional stock pursuant to various stock plans	0	3
Net cash provided by (used in) financing activities	962,434	(169,739)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(69,434)	89,750
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	698,567	459,606
CASH AND CASH EQUIVALENTS, END OF PERIOD	629,133	549,356
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Interest paid	117,560	155,889
Income taxes paid	35,365	44,492
SUPPLEMENTAL DISCLOSURES OF NON-CASH ACTIVITIES
Transfer from loans receivable to OREO	979	14,651
Transfer from loans receivable to loans held for sale	1,002	108,979
Transfer from loans held for sale to loans receivable	2,384	5,181
Lease liabilities arising from obtaining right-of-use assets	$ 0	$ 62,833

Hope Bancorp, Inc.

Hope Bancorp, Inc.	9 Months Ended
	Sep. 30, 2020
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, 2020, the Bank operated branches in California, Washington, Texas, Illinois, Alabama, Virginia, New Jersey, and New York, loan production offices in Colorado, Texas, Oregon, Washington, Georgia, New Jersey, Southern California, and Northern California, and a representative office in Seoul, South Korea. The Company is a corporation organized under the laws of the state of Delaware and a bank holding company registered under the Bank Holding Company Act of 1956, as amended.

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2020
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, 2019 which was from the audited financial statements included in the Company’s 2019 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, 2020 and December 31, 2019 and the results of operations for the three and nine months ended September 30, 2020 and 2019. 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. The global pandemic resulting from the outbreak of the novel strain of coronavirus (“COVID-19”) has substantially and negatively impacted the United States economy, disrupted global supply chains, considerably lowered equity market valuations, created significant volatility and disruption in financial markets, and materially increased unemployment levels. In addition, the pandemic has resulted in temporary closures of countless businesses and the institution of social distancing and sheltering in place requirements in most states and communities. The Company has, and could continue to, experience a material and adverse effect on its business as a result of the impact of the COVID-19 pandemic, and the resulting governmental actions to curtail its spread. It is at least reasonably possible that information which was available to the Company at the date of the financial statements will change in the near term due to the COVID-19 pandemic and that the effect of the change could be material to the financial statements. The extent to which the COVID-19 pandemic will impact the Company’s estimates and assumptions is highly uncertain. These unaudited consolidated financial statements should be read along with the audited consolidated financial statements and accompanying notes included in the Company’s 2019 Annual Report on Form 10-K. Pending Accounting Pronouncements In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform: Facilitation of the Effects of Reference Rate Reform on Financial Reporting”. The amendments provide temporary, optional guidance to ease the potential burden in accounting for reference rate reform. The amendments provide optional expedients and exceptions for applying GAAP to transactions affected by reference rate reform if certain criteria are met. The amendments primarily include relief related to contract modifications and hedging relationships, as well as providing a one-time election for the sale or transfer of debt securities classified as held-to-maturity. This one time election may be made at any time after March 12, 2020, but no later than December 31, 2022. The Company is currently in the process of evaluating ASU 2020-04 to determine whether the Company will make this election and is currently assessing the significance of impact of modifying contracts in consideration of the election of this amendment.

Earnings Per Share ("EPS")

Earnings Per Share ("EPS")	9 Months Ended
	Sep. 30, 2020
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, 2020 and 2019, stock options and restricted share awards of 1,206,040 and 963,400 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, 2020 and 2019, stock options and restricted shares awards of 876,565 and 986,245 shares of common stock, respectively, were excluded in computing diluted earnings per common share because they were anti-dilutive. The Company previously 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 10 “Subordinated Debentures and Convertible Notes” for additional information regarding convertible notes issued). For the three and nine months ended September 30, 2020 and 2019, 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, 2020 and 2019. In June 2019, the Company’s Board of Directors approved a share repurchase program that authorized the Company to repurchase up to $50.0 million of its common stock which was completed in March 2020. As of September 30, 2020, the Company had repurchased 12,661,581 shares of common stock totaling $200.0 million as part of previously announced share repurchase programs. The Company’s Board of Directors had previously approved the repurchase of $150.0 million in shares of common stock in 2018, all of which were repurchased in the year ended December 31, 2018. The repurchased shares were recorded as treasury stock and reduced the total number of common shares outstanding. The following tables show the computation of basic and diluted EPS for the three and nine months ended September 30, 2020 and 2019. Three Months Ended September 30, 2020 2019 Net Income Weighted-Average Shares Earnings Net Income Weighted-Average Shares Earnings (Dollars in thousands, except share and per share data) Basic EPS - common stock $ 30,490 123,251,336 $ 0.25 $ 42,592 126,685,921 $ 0.34 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 285,429 321,548 Diluted EPS - common stock $ 30,490 123,536,765 $ 0.25 $ 42,592 127,007,469 $ 0.34 Nine Months Ended September 30, 2020 2019 Net Income Weighted-Average Shares Earnings Net Income Weighted-Average Shares Earnings (Dollars in thousands, except share and per share data) Basic EPS - common stock $ 83,196 123,581,055 $ 0.67 $ 128,031 126,661,798 $ 1.01 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 314,029 234,172 Diluted EPS - common stock $ 83,196 123,895,084 $ 0.67 $ 128,031 126,895,970 $ 1.01

Equity Investments

Equity Investments	9 Months Ended
	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Equity Investments	Equity Investments Equity investments with readily determinable fair values at September 30, 2020 and December 31, 2019, consisted of mutual funds in the amounts of $22.7 million and $22.1 million, respectively, and were included in “Equity investments” on the Consolidated Statements of Financial Condition. The changes in fair value for equity investments with readily determinable fair values for the three and nine months ended September 30, 2020 and 2019 were recorded in other noninterest income and fees as summarized in the table below: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in thousands) Net change in fair value recorded during the period on equity investments with readily determinable fair value $ — $ 168 $ 542 $ 1,393 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 $ 542 $ 1,393 At September 30, 2020 and December 31, 2019, 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, 2020, the total balance of equity investments without readily determinable fair values included in “Equity investments” on the Consolidated Statements of Financial Condition was $27.0 million, consisting of $370 thousand in correspondent bank stock, $1.0 million in Community Development Financial Institutions (“CDFI”) investments, and $25.7 million in Community Reinvestment Act (“CRA”) investments. At December 31, 2019, the total balance of equity investments without readily determinable fair values was $27.0 million, consisting of $370 thousand in correspondent bank stock, $1.0 million in CDFI investments, and $25.6 million in CRA investments.

Securities Available for Sale

Securities Available for Sale	9 Months Ended
	Sep. 30, 2020
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, 2020 Amortized Gross Gross Allowance For (Dollars in thousands) Debt securities: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 779,720 $ 13,975 $ (99) $ — $ 793,596 Mortgage-backed securities: Residential 671,027 6,294 (582) — 676,739 Commercial 474,963 25,761 — — 500,724 Corporate securities 5,000 — (1,112) — 3,888 Municipal securities 83,845 2,199 — — 86,044 Total investment securities available for sale $ 2,014,555 $ 48,229 $ (1,793) $ — $ 2,060,991 At December 31, 2019 Amortized Gross Gross Allowance For (Dollars in thousands) Debt securities: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 735,094 $ 4,220 $ (2,659) N/A $ 736,655 Mortgage-backed securities: Residential 353,073 1,422 (1,598) N/A 352,897 Commercial 541,043 13,441 (2,360) N/A 552,124 Corporate securities 5,000 — (800) N/A 4,200 Municipal securities 69,631 831 (351) N/A 70,111 Total investment securities available for sale $ 1,703,841 $ 19,914 $ (7,768) N/A $ 1,715,987 As of September 30, 2020 and December 31, 2019, 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, 2020, the Company recognized $7.5 million in net gains on sales of securities available for sale. For the three and nine months ended September 30, 2019, the Company recognized net gains on sales of securities available for sale of $153 thousand and $282 thousand, respectively. For the three and nine months ended September 30, 2020, the Company received proceeds from sale of $168.1 million of securities available for sale, which consisted of $34.6 million commercial mortgage-backed securities, $113.2 million residential mortgage-backed securities and $20.2 million collateralized mortgage obligations. 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 residential 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 residential mortgage-backed securities sold. At September 30, 2020 and December 31, 2019, $33.2 million and $9.1 million in unrealized gains on securities available for sale net of taxes, respectively, were included in accumulated other comprehensive income. For the three and nine months ended September 30, 2020, $7.5 million was reclassified out of accumulated other comprehensive income into earnings as gain on sales of investments securities available for sale. For the three and nine months ended September 30, 2019, reclassifications out of accumulated other comprehensive income into earnings as gains on sales of investments securities available for sale were $153 thousand and $282 thousand, respectively. The amortized cost and estimated fair value of investment securities at September 30, 2020, 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 Estimated (Dollars in thousands) Available for sale: Due within one year $ 350 $ 351 Due after one year through five years — — Due after five years through ten years 5,441 5,477 Due after ten years 83,054 84,104 U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations 779,720 793,596 Mortgage-backed securities: Residential 671,027 676,739 Commercial 474,963 500,724 Total $ 2,014,555 $ 2,060,991 Securities with carrying values of approximately $371.6 million and $340.9 million at September 30, 2020 and December 31, 2019, 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, 2020 Less than 12 months 12 months or longer Total Description of Number Fair Gross Number Fair Gross Number Fair Gross (Dollars in thousands) Collateralized mortgage obligations* 8 $ 94,580 $ (99) — $ — $ — 8 $ 94,580 $ (99) Mortgage-backed securities: Residential* 7 114,906 (582) — — — 7 114,906 (582) Commercial* — — — — — — — — — Corporate securities — — — 1 3,888 (1,112) 1 3,888 (1,112) Municipal securities — — — — — — — — — Total 15 $ 209,486 $ (681) 1 $ 3,888 $ (1,112) 16 $ 213,374 $ (1,793) __________________________________ * Investments in U.S. Government agency and U.S. Government sponsored enterprises As of December 31, 2019 Less than 12 months 12 months or longer Total Description of Number Fair Gross Number Fair Gross Number Fair Gross (Dollars in thousands) Collateralized mortgage obligations* 20 $ 108,236 $ (721) 32 $ 183,050 $ (1,938) 52 $ 291,286 $ (2,659) Mortgage-backed securities: Residential* 6 84,107 (267) 16 129,457 (1,331) 22 213,564 (1,598) Commercial* 7 68,452 (1,037) 5 73,697 (1,323) 12 142,149 (2,360) Corporate securities — — — 1 4,200 (800) 1 4,200 (800) Municipal securities 2 8,942 (39) 3 15,437 (312) 5 24,379 (351) Total 35 $ 269,737 $ (2,064) 57 $ 405,841 $ (5,704) 92 $ 675,578 $ (7,768) __________________________________ * Investments in U.S. Government agency and U.S. Government sponsored enterprises The Company had one corporate security that was in a continuous unrealized loss position for twelve months or longer with fair value of $3.9 million as of September 30, 2020. With the adoption of CECL, the length of time that the fair value of investment securities have been less than amortized cost is not considered when assessing for credit impairment. On January 1, 2020, the Company adopted ASU 2016-13 and implemented the CECL methodology for allowance for credit losses on its investment securities available for sale. The new CECL methodology replaces the other-than-temporary impairment model that previously existed. The Company did not have a day 1 allowance impact attributable to its investment securities portfolio and did not have an allowance for credit losses as of September 30, 2020 . The Company has elected to exclude accrued interest from the amortized cost of its investment securities available for sale. Accrued interest receivable for investment securities available for sale at September 30, 2020 and December 31, 2019 , totaled $4.4 million and $4.3 million, respectively. The Company evaluates securities in unrealized loss position for impairment related to credit losses on at least a quarterly basis. Securities in unrealized loss positions are first assessed as to whether we intend to sell, or if it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis. If one of the criteria is met, the security’s amortized cost basis is written down to fair value through current earnings. For securities that do not meet these criteria, the Company evaluates whether the decline in fair value resulted from credit losses or other factors. In evaluating whether a credit loss exists, the Company has set up an initial filter for impairment triggers. Once the quantitative filters have been triggered, the securities are placed on a watch list and an additional assessment is performed to identify whether a credit impairment exists. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security and the issuer, among other factors. If this assessment indicates that a credit loss exists, we compare the present value of cash flows expected to be collected from the security with the amortized cost basis. If the present value of cash flows expected to be collected is less than the amortized cost basis for the security, a credit loss exists and an allowance for credit losses is recorded, limited to the amount that the fair value of the security is less than its amortized cost basis. Unrealized losses that have not been recorded through an allowance for credit losses is recognized in other comprehensive income, net of applicable taxes. No allowance for credit losses for available for sale securities was recorded at September 30, 2020. Approximately 96% of the Company’s investment portfolio at September 30, 2020 consisted of securities that were issued by U.S. Government agency and U.S. Government sponsored enterprises. Although a government guarantee exists on these investments, these entities are not legally backed by the full faith and credit of the federal government, and the current support they receive is subject to a cap as part of the agreement entered into in 2008. Nonetheless, at this time we do not foresee any set of circumstances in which the government would not fund its commitments on these investments as the issuers are an integral part of the U.S. housing market in providing liquidity and stability. Therefore, we concluded that a zero allowance approach for these investment securities is appropriate. The Company had also had one corporate security, eight collateralized mortgage obligations, and seven mortgage-backed securities in unrealized loss positions at September 30, 2020. The Company performed an assessment of these investments for credit impairment and concluded that no allowance for credit losses was required at September 30, 2020.

Loans Receivable and Allowance

Loans Receivable and Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Loans Receivable and Allowance for Credit Losses	Loans Receivable and Allowance for Credit Losses The following is a summary of loans receivable by major category: September 30, 2020 December 31, 2019 Loan portfolio composition (Dollars in thousands) Real estate loans: Residential $ 54,585 $ 52,558 Commercial 8,347,358 8,316,470 Construction 311,593 295,523 Total real estate loans 8,713,536 8,664,551 Commercial business 1 3,700,020 2,721,183 Residential mortgage 659,876 835,188 Consumer and other 46,793 55,085 Loans receivable 13,120,225 12,276,007 Allowance for credit losses (179,849) (94,144) Loans receivable, net of allowance for credit losses $ 12,940,376 $ 12,181,863 __________________________________ 1 Commercial Business loans as of September 30, 2020 includes $464.6 million in SBA Paycheck Protection Program Loans Loans receivable is stated at the amount of unpaid principal, adjusted for net deferred fees and costs, premiums and discounts, purchase accounting fair value adjustments, and allowance for credit losses. Loan balances as of December 31, 2019 have been reclassified based on the Company’s current presentation and represent amortized cost balances which are net of deferred fees and costs. The Company had net deferred fees of $5.4 million and net deferred costs of $2.7 million at September 30, 2020 and December 31, 2019, respectively. The loan portfolio consists of four segments: real estate, commercial business, residential mortgage, and consumer and other loans. 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, international trade finance activities, and other business related financing needs and also include warehouse lines of credit and SBA Paycheck Protection Program (“PPP”) loans. Residential mortgage loans are extended for personal, family, or household use and are secured by a mortgage or deed of trust. Consumer and other loans consist of home equity, credit card, and other personal loans. On January 1, 2020, the Company adopted ASU 2016-13, or CECL, using the modified retrospective method for all of its loans measured at amortized cost. With the adoption of CECL, the Company reassessed its loan portfolio segments and classes of loans receivable and made changes based on the new allowance for credit losses methodology. As a result, the Company now discloses residential mortgage loans as a separate segment and class of receivable. Trade finance loans, which were previously disclosed as a distinct segment and class of receivable, are now combined with commercial business loans. Prior period balances have been reclassified to conform with the current presentation. The tables below details the activity in the allowance for credit losses by portfolio segment for the three and nine months ended September 30, 2020 and 2019. Accrued interest receivable on loans totaled $53.5 million at September 30, 2020 and $26.2 million at December 31, 2019. Real Estate Commercial Business Residential Mortgage Consumer and Other Total (Dollars in thousands) Three Months Ended September 30, 2020 Balance, beginning of period $ 119,030 $ 35,493 $ 5,868 $ 1,380 $ 161,771 Provision (credit) for credit losses 15,748 7,265 (1,169) 156 22,000 Loans charged off (5,313) (800) — (237) (6,350) Recoveries of charge offs 159 2,251 — 18 2,428 Balance, end of period $ 129,624 $ 44,209 $ 4,699 $ 1,317 $ 179,849 Nine Months Ended September 30, 2020 Balance, beginning of period $ 53,593 $ 33,032 $ 5,925 $ 1,594 $ 94,144 CECL day 1 adoption 27,791 (1,022) (543) (26) 26,200 Provision (credit) for credit losses 55,773 11,663 (683) 747 67,500 Loans charged off (7,884) (4,294) — (1,033) (13,211) Recoveries of charge offs 351 4,830 — 35 5,216 Balance, end of period $ 129,624 $ 44,209 $ 4,699 $ 1,317 $ 179,849 Real Estate Commercial Business Residential Mortgage Consumer and Other Total (Dollars in thousands) Three Months Ended September 30, 2019 Balance, beginning of period $ 54,084 $ 32,364 $ 5,514 $ 2,104 $ 94,066 Provision (credit) for loan losses (87) 2,286 (207) 108 2,100 Loans charged off (1,197) (1,124) — (281) (2,602) Recoveries of charge offs 246 528 — 6 780 PCI allowance adjustment — — — (462) (462) Balance, end of period $ 53,046 $ 34,054 $ 5,307 $ 1,475 $ 93,882 Nine Months Ended September 30, 2019 Balance, beginning of period $ 56,767 $ 28,484 $ 5,207 $ 2,099 $ 92,557 Provision (credit) for loan losses (4,225) 9,693 176 656 6,300 Loans charged off (1,439) (4,083) (76) (834) (6,432) Recoveries of charge offs 1,943 838 — 16 2,797 PCI allowance adjustment — (878) — (462) (1,340) Balance, end of period $ 53,046 $ 34,054 $ 5,307 $ 1,475 $ 93,882 The following tables break out the allowance for credit losses and loan balance by measurement methodology at September 30, 2020 and December 31, 2019: September 30, 2020 Real Estate Commercial Business Residential Mortgage Consumer and Other Total (Dollars in thousands) Allowance for credit losses: Individually evaluated $ 2,339 $ 4,485 $ 21 $ 50 $ 6,895 Collectively evaluated 127,285 39,724 4,678 1,267 172,954 Total $ 129,624 $ 44,209 $ 4,699 $ 1,317 $ 179,849 Loans outstanding: Individually evaluated $ 76,025 $ 24,930 $ 3,775 $ 802 $ 105,532 Collectively evaluated 8,637,511 3,675,090 656,101 45,991 13,014,693 Total $ 8,713,536 $ 3,700,020 $ 659,876 $ 46,793 $ 13,120,225 December 31, 2019 Real Estate Commercial Business Residential Mortgage Consumer and Other Total (Dollars in thousands) Allowance for loan losses: Individually evaluated for impairment $ 312 $ 3,073 $ 10 $ 7 $ 3,402 Collectively evaluated for impairment 48,616 26,914 5,913 1,220 82,663 PCI loans 4,665 3,045 2 367 8,079 Total $ 53,593 $ 33,032 $ 5,925 $ 1,594 $ 94,144 Loans outstanding: Individually evaluated for impairment $ 64,684 $ 22,905 $ 2,762 $ 301 $ 90,652 Collectively evaluated for impairment 8,502,103 2,691,378 832,268 54,037 12,079,786 PCI loans 97,764 6,900 158 747 105,569 Total $ 8,664,551 $ 2,721,183 $ 835,188 $ 55,085 $ 12,276,007 As of September 30, 2020 and December 31, 2019, reserves for unfunded loan commitments recorded in other liabilities were $1.3 million and $636 thousand, respectively. For the three and nine months ended September 30, 2020, the Company recorded additions to reserves for unfunded commitments recorded in credit related expenses totaling $0 and $660 thousand, respectively. For the three and nine months ended September 30, 2019, the Company recorded reductions to reserves for unfunded commitments recorded in credit related expenses totaling to $100 thousand. 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 conditions have 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 does not recognize interest income while loans are on nonaccrual status. The tables below represent the recorded investment of nonaccrual loans and loans past due 90 or more days and still on accrual status by class of loans and broken out by loans with a recorded ACL and those without a recorded ACL as of September 30, 2020 and total nonaccrual loans and loans past due 90 or more days and still on accrual status by class of loans as of December 31, 2019. September 30, 2020 Nonaccrual with No ACL Nonaccrual with an ACL Total Nonaccrual (1) Accruing Loans Past Due 90 or More Days (Dollars in thousands) Real estate – residential $ — $ — $ — $ — Real estate – commercial Retail 8,023 3,688 11,711 — Hotel & motel 14,280 2,260 16,540 — Gas station & car wash 351 928 1,279 — Mixed use 1,531 815 2,346 293 Industrial & warehouse 4,618 1,950 6,568 — Other 4,576 2,121 6,697 — Real estate – construction 6,598 — 6,598 — Commercial business 4,351 8,671 13,022 — Residential mortgage 2,335 1,440 3,775 — Consumer and other — 669 669 1,244 Total $ 46,663 $ 22,542 $ 69,205 $ 1,537 December 31, 2019 Nonaccrual Loans (1)(2) Accruing Loans Past Due 90 or More Days (Dollars in thousands) Real estate – residential $ — $ — Real estate – commercial Retail 2,934 449 Hotel & motel 10,901 — Gas station & car wash 271 — Mixed use 665 634 Industrial & warehouse 10,544 — Other 5,455 919 Real estate – construction 10,165 3,850 Commercial business 10,893 1,096 Residential mortgage 2,753 — Consumer and other 204 599 Total $ 54,785 $ 7,547 __________________________________ (1) Total nonaccrual loans exclude the guaranteed portion of SBA loans that are in liquidation totaling $26.2 million and $28.1 million, at September 30, 2020 and December 31, 2019, respectively. (2) Nonaccrual loans exclude PCI loans of $18.3 million at December 31, 2019. The following table presents the amortized cost basis of collateral-dependent loans as of September 30, 2020: September 30, 2020 Real Estate Collateral Other Collateral Total (Dollars in thousands) Real Estate - Residential $ — $ — $ — Real Estate - Commercial 55,024 — 55,024 Real Estate - Construction 6,598 — 6,598 Commercial Business 7,581 5,415 12,996 Residential Mortgage 2,335 — 2,335 Consumer and Other 11 — 11 Total $ 71,549 $ 5,415 $ 76,964 Interest income reversals due to loans being placed on nonaccrual status was $76 thousand and $85 thousand for the three months ended September 30, 2020 and 2019, respectively. Nonaccrual interest income reversals for the nine months ended September 30, 2020 and 2019 was $611 thousand and $1.1 million, respectively. The following table presents 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, 2020 and December 31, 2019 by class of loans: As of September 30, 2020 As of December 31, 2019 30-59 Days 60-89 Days 90 or More Days Total 30-59 Days 60-89 Days 90 or More Days Total (1) (Dollars in thousands) Real estate – residential $ — $ — $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 328 44,776 10,074 55,178 1,083 1,424 3,037 5,544 Hotel & motel 534 2,081 13,679 16,294 1,346 936 6,409 8,691 Gas station & car wash 461 — 763 1,224 997 2,038 196 3,231 Mixed use 551 — 1,348 1,899 593 — 801 1,394 Industrial & warehouse 467 1,095 3,735 5,297 94 45 3,946 4,085 Other 2,054 2,671 1,120 5,845 811 785 3,704 5,300 Real estate – construction — 8,122 6,598 14,720 — — 14,015 14,015 Commercial business 638 575 6,740 7,953 401 352 5,717 6,470 Residential mortgage 1,185 2,456 2,821 6,462 9,676 792 2,038 12,506 Consumer and other 66 509 1,853 2,428 176 122 614 912 Total Past Due $ 6,284 $ 62,285 $ 48,731 $ 117,300 $ 15,177 $ 6,494 $ 40,477 $ 62,148 __________________________________ (1) Past due loans at December 31, 2019 exclude PCI loans totaling $15.0 million. 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. Homogeneous loans (i.e., home mortgage loans, home equity lines of credit, overdraft loans, express business loans, and automobile 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 table presents the amortized cost basis of loans receivable by class, credit quality indicator, and year of origination as of September 30, 2020. As of September 30, 2020 Term Loan by Origination Year Revolving Loans Total 2020 2019 2018 2017 2016 Prior (Dollars in thousands) Real Estate - Residential Pass/Not Rated $ 5,818 $ 16,509 $ 11,599 $ 4,352 $ 7,592 $ 5,061 $ 3,429 $ 54,360 Special mention — — — — — — — — Substandard — — 140 — — 85 — 225 Doubtful/Loss — — — — — — — — Subtotal $ 5,818 $ 16,509 $ 11,739 $ 4,352 $ 7,592 $ 5,146 $ 3,429 $ 54,585 Real Estate - Commercial Pass/Not Rated $ 1,112,640 $ 1,587,016 $ 1,605,796 $ 1,297,459 $ 868,639 $ 1,468,638 $ 104,518 $ 8,044,706 Special mention — 2,047 12,923 17,203 1,681 10,082 — 43,936 Substandard — 12,090 25,640 24,666 41,610 151,514 3,196 258,716 Doubtful/Loss — — — — — — — — Subtotal $ 1,112,640 $ 1,601,153 $ 1,644,359 $ 1,339,328 $ 911,930 $ 1,630,234 $ 107,714 $ 8,347,358 Real Estate - Construction Pass/Not Rated $ 29,382 $ 38,336 $ 109,419 $ 82,598 $ 5,608 $ 10,031 $ — $ 275,374 Special mention — — — — 5,774 5,124 — 10,898 Substandard — — — 10,601 — 8,122 — 18,723 Doubtful/Loss — — — 6,598 — — — 6,598 Subtotal $ 29,382 $ 38,336 $ 109,419 $ 99,797 $ 11,382 $ 23,277 $ — $ 311,593 Commercial Business Pass/Not Rated $ 979,904 $ 628,028 $ 246,008 $ 134,655 $ 90,613 $ 55,025 $ 1,437,781 $ 3,572,014 Special mention 5,990 27,099 31,111 15,083 6,503 3,007 9,644 98,437 Substandard 1,485 851 6,534 4,459 6,864 5,071 4,263 29,527 Doubtful/Loss — — — — 42 — — 42 Subtotal $ 987,379 $ 655,978 $ 283,653 $ 154,197 $ 104,022 $ 63,103 $ 1,451,688 $ 3,700,020 Residential Mortgage Pass/Not Rated $ 4,881 $ 111,963 $ 251,894 $ 184,337 $ 60,122 $ 42,747 $ — $ 655,944 Special mention — — — — — — — — Substandard — 122 1,448 — 1,717 645 — 3,932 Doubtful/Loss — — — — — — — — Subtotal $ 4,881 $ 112,085 $ 253,342 $ 184,337 $ 61,839 $ 43,392 $ — $ 659,876 Consumer and Other Pass/Not Rated $ 5,747 $ 2,602 $ 2,051 $ 2,687 $ 5,203 $ 2,881 $ 24,726 $ 45,897 Special mention — — — 117 — — — 117 Substandard — — — — 40 739 — 779 Doubtful/Loss — — — — — — — — Subtotal $ 5,747 $ 2,602 $ 2,051 $ 2,804 $ 5,243 $ 3,620 $ 24,726 $ 46,793 Total Loans Pass/Not Rated $ 2,138,372 $ 2,384,454 $ 2,226,767 $ 1,706,088 $ 1,037,777 $ 1,584,383 $ 1,570,454 $ 12,648,295 Special mention 5,990 29,146 44,034 32,403 13,958 18,213 9,644 153,388 Substandard 1,485 13,063 33,762 39,726 50,231 166,176 7,459 311,902 Doubtful/Loss — — — 6,598 42 — — 6,640 Total $ 2,145,847 $ 2,426,663 $ 2,304,563 $ 1,784,815 $ 1,102,008 $ 1,768,772 $ 1,587,557 $ 13,120,225 For the three and nine months ended September 30, 2020, there were no revolving loans converted to term loans. The following table presents the recorded investment in the Company’s loans by loan class and credit risk rating as of December 31, 2019. As of December 31, 2019 Pass/Not Rated Special Mention Substandard Doubtful Total (Dollars in thousands) Real estate – residential $ 52,096 $ — $ 462 $ — $ 52,558 Real estate – commercial 8,039,751 78,519 198,200 — 8,316,470 Real estate – construction 253,173 24,620 17,730 — 295,523 Commercial business 2,643,814 38,185 39,171 13 2,721,183 Residential mortgage 832,149 — 3,039 — 835,188 Consumer and other 53,966 166 953 — 55,085 Total $ 11,874,949 $ 141,490 $ 259,555 $ 13 $ 12,276,007 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, 2020 and 2019 is presented in the following table: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Transfer of loans held for investment to held for sale (Dollars in thousands) Real estate - commercial $ — $ 25,988 $ — $ 25,988 Residential mortgage — — 1,002 82,991 Total $ — $ 25,988 $ 1,002 $ 108,979 On January 1, 2020 the Company adopted ASU 2016-13, “Measurement of Credit Losses on Financial Instruments”, or CECL which significantly changed the credit losses estimation model for loans and investments. The discussion below relates to the Company’s CECL allowance for credit losses (“ACL”) methodology. For a discussion of the Company’s former incurred loss allowance for loan losses methodology, please refer to the Company’s Annual Report on Form 10-K for the year ended December 31, 2019. The Company calculates its ACL by estimating expected credit losses on a collective basis for loans that share similar risk characteristics. Loans that do not share similar risk characteristics with other loans are evaluated for credit losses on an individual basis. The Company uses a combination of a modeled and non-modeled approach that incorporates current and future economic conditions to estimate lifetime expected losses on a collective basis. The Company uses Probability of Default (“PD”), Loss Given Default (“LGD”), and Exposure at Default (“EAD”) methodologies with quantitative factors and qualitative considerations in calculation of the allowance for credit losses for collectively assessed loans. The Company uses a reasonable and supportable period of 2 years at which point loss assumptions revert back to historical loss information by means of 1 year reversion period. The ACL for the Company’s construction, credit card, and certain consumer loans is calculated based on a non-modeled approach utilizing historical loss rates to estimate losses. A non-modeled approach was chosen for these loans as fewer data points exist which could result in high levels of estimated loss volatility under a modeled approach. In aggregate, non-modeled loans represented less than 3% of the Company’s total loan portfolio as of September 30, 2020. With the adoption of CECL, the Company formed an Economic Forecast Committee (“EFC”) to review economic forecast scenarios that are incorporated in the Company’s ACL. The EFC reviews multiple scenarios provided to the Company by an independent third party and chooses a single scenario that best aligns with management’s expectation of future economic conditions. The forecast scenario contains certain macroeconomic variables that are incorporated into the Company’s modeling process, including GDP, unemployment rates, interest rates, and commercial real estate prices. As of September 30, 2020, the Company chose a forecast scenario that incorporates the effect of the COVID-19 pandemic into estimates of future economic conditions. We experienced a large decline in GDP and an increase in unemployment for the first half of 2020 and the forecast scenarios project a return to GDP growth in the second half of 2020, while unemployment remains elevated through 2022. Additionally, in order to systematically quantify the credit risk impact of other trends and changes within the loan portfolio, the Company utilizes qualitative adjustments to the modeled and non-modeled estimated loss approaches. 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 25 basis points for each loan type pool. This matrix considers the following seven 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, updated to reflect the adoption of CECL: • Changes in lending policies and procedures, including underwriting standards and collection, charge off, and recovery practices; • 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; • 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. As of September 30, 2020, the Company recorded additional ACL as part of its modeled and qualitative assessments to account for the additional risks associated with the increase in loan modifications related to the COVID-19 pandemic and to account for the Company’s concentration of hotel/motel loans for which the industry was particularly hard hit by the pandemic. For loans which do not share similar risk characteristics such as nonaccrual and TDR loans above $500 thousand, the Company evaluates these loans on an individual basis in accordance with ASC 326. These nonaccrual and TDR loans are considered to have different risk profiles than performing loans and therefore are evaluated separately. The Company decided to collectively assess TDRs and nonaccrual loans with balances below $500 thousand along with the performing and accrual loans in order to reduce the operational burden of individually assessing small TDR and nonaccrual loans with immaterial balances. For individually assessed loans, the ACL is measured using either 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 loans, the Company obtains a new appraisal to determine the fair value of collateral. The appraisals are based on an “as-is” valuation. To ensure that appraised values remain current, the Company either obtains updated appraisals every twelve months from a qualified independent appraiser or an internal evaluation of the collateral is performed by qualified personnel. If the third party market data indicates that the value of the collateral property has declined since the most recent valuation date, management adjusts the value of the property downward to reflect current market conditions. If the fair value of the collateral is less than the amortized balance of the loan, the Company recognizes an ACL with a corresponding charge to the provision for credit losses. The Company maintains a separate ACL for its off-balance sheet unfunded loan commitments. The Company uses a funding rate to allocate the allowance to undrawn exposures. This funding rate is used as a credit conversion factor to capture how much undrawn can potentially become drawn at any point. The funding rate is determined based on a lookback period of 8 quarters. Credit loss is not estimated for off-balance sheet credit exposures that are unconditionally cancellable by the Company. The following tables present a breakdown of loans by recorded ACL, broken out by loans evaluated individually and collectively at September 30, 2020 and December 31, 2019: As of September 30, 2020 Real Estate – Real Estate – Real Estate – Commercial Residential Consumer Total (Dollars in thousands) Individually evaluated loans $ — $ 69,427 $ 6,598 $ 24,930 $ 3,775 $ 802 $ 105,532 ACL on individually evaluated loans $ — $ 2,339 $ — $ 4,485 $ 21 $ 50 $ 6,895 Individually evaluated loans ACL coverage N/A 3.37 % N/A 17.99 % 0.56 % 6.23 % 6.53 % Collectively evaluated loans $ 54,585 $ 8,277,931 $ 304,995 $ 3,675,090 $ 656,101 $ 45,991 $ 13,014,693 ACL on collectively evaluated loans $ 208 $ 125,144 $ 1,933 $ 39,724 $ 4,678 $ 1,267 $ 172,954 Collectively evaluated loans ACL coverage 0.38 % 1.51 % 0.63 % 1.08 % 0.71 % 2.75 % 1.33 % Total loans $ 54,585 $ 8,347,358 $ 311,593 $ 3,700,020 $ 659,876 $ 46,793 $ 13,120,225 Total ACL $ 208 $ 127,483 $ 1,933 $ 44,209 $ 4,699 $ 1,317 $ 179,849 Total ACL to total loans 0.38 % 1.53 % 0.62 % 1.19 % 0.71 % 2.81 % 1.37 % As of December 31, 2019 Real Estate – Real Estate – Real Estate – Commercial Residential Consumer Total (Dollars in thousands) Impaired loans (recorded investment) $ — $ 54,519 $ 10,165 $ 22,905 $ 2,762 $ 301 $ 90,652 Specific allowance $ — $ 312 $ — $ 3,073 $ 10 $ 7 $ 3,402 Specific allowance to impaired loans N/A 0.57 % — % 13.42 % 0.36 % 2.33 % 3.75 % Other loans $ 52,558 $ 8,261,951 $ 285,358 $ 2,698,278 $ 832,426 $ 54,784 $ 12,185,355 General allowance $ 204 $ 51,400 $ 1,677 $ 29,959 $ 5,915 $ 1,587 $ 90,742 General allowance to other loans 0.39 % 0.62 % 0.59 % 1.11 % 0.71 % 2.90 % 0.74 % Total loans $ 52,558 $ 8,316,470 $ 295,523 $ 2,721,183 $ 835,188 $ 55,085 $ 12,276,007 Total allowance for loan losses $ 204 $ 51,712 $ 1,677 $ 33,032 $ 5,925 $ 1,594 $ 94,144 Total allowance to total loans 0.39 % 0.62 % 0.57 % 1.21 % 0.71 % 2.89 % 0.77 % Under certain circumstances, the Company provides borrowers relief through loan modifications. These modifications are either temporary in nature (“temporary modifications”) or are more substantive. The temporary modifications generally consist of interest only payments for a three six TDR loans are individually evaluated in accordance with ASC 310 and ASC 326. The concessions may be granted in various forms, including reduction in the stated interest rate, reduction in the amount of principal amortization, forgiveness of a portion of a loan balance or accrued interest, or extension of the maturity date. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed on the probability that the borrower will be in payment default on their debt in the foreseeable future without the modification. This evaluation is performed under the Bank’s internal underwriting policy. At September 30, 2020, total TDR loans were $49.5 million, compared to $46.7 million at December 31, 2019. The balance of loans with modified terms due to COVID-19 as of September 30, 2020 totaled $1.15 billion. The majority of these loans were modified in accordance with Section 4013 of the CARES Act. The CARES Act provides banks the option to temporarily suspend certain requirements under U.S. GAAP related to TDR for a limited period of time to account for the effects of COVID-19 if (i) the loan modification is made between March 1, 2020 and the earlier of December 31, 2020 or 60 days after the end of the coronavirus emergency declaration and (ii) the applicable loan was not more than 30 days past due as of December 31, 2019. As such, all modified loans that met the criteria outlined within Section 4013 of the CARES Act were not classified as TDR loans as of September 30, 2020, unless the loans were TDR prior to the COVID-19 modification. As of September 30, 2020, real estate loans accounted for a little less than 90% of the loans modified due to hardship from the COVID-19 pandemic. The modifications consisted of full payment deferrals, interest only payments, and a hybrid of full payment deferrals for a period of time followed by interest only payments. The modifications were granted mostly for periods from 3 to 9 months (see “COVID-19 Related Loan Modifications” in the Financial Condition section of the Management’s Discussion and Analysis of Financial Condition and Results of Operations for more information). A summary of the recorded investment of TDR loans on accrual and nonaccrual status by type of concession as of September 30, 2020 and December 31, 2019 is presented below: As of September 30, 2020 TDR Loans on Accrual Status TDR Loans on Nonaccrual Status Total TDRs Real Estate Commercial Business Residential Mortgage Other Real Estate Commercial Business Residential Mortgage Other (Dollars in thousands) Payment concession $ 5,944 $ 925 $ — $ 41 $ 7,323 $ 332 $ — $ — $ 14,565 Maturity / amortization concession 11,874 10,730 — 93 178 4,244 — 118 27,237 Rate concession 5,822 — — — 439 1,434 — — 7,695 Total $ 23,640 $ 11,655 $ — $ 134 $ 7,940 $ 6,010 $ — $ 118 $ 49,497 As of December 31, 2019 TDR Loans on Accrual Status TDR Loans on Nonaccrual Status Total Real Estate Commercial Business Residential Mortgage Other Real Estate Commercial Business Residential Mortgage Other (Dollars in thousands) Payment concession $ 4,708 $ 886 $ — $ 54 $ 4,306 $ 259 $ — $ — $ 10,213 Maturity / amortization concession 14,537 10,778 — 43 — 5,931 — 122 31,411 Rate concession 4,419 181 — 103 334 65 — — 5,102 Total $ 23,664 $ 11,845 $ — $ 200 $ 4,640 $ 6,255 $ — $ 122 $ 46,726 TDR loans on accrual status are comprised of loans that were accruing at the time of restructuring and for which the Company anticipates full repayment of both principal and interest under the restructured terms. TDR loans that are on nonaccrual status can be returned to accrual status after a period of sustained performance, generally determined to be six months of timely payments as modified. Sustained performance includes the periods prior to the modification and if the prior performance met or exceeded the modified terms. TDR loans on accrual status at September 30, 2020 were comprised of 30 commercial real estate loans totaling $23.6 million, 29 commercial business loans totaling $11.7 million, and 16 consumer and other loans totaling $134 thousand. TDR loans on accrual status at December 31, 2019 were comprised of 15 commercial real estate loans totaling $23.7 million, 27 commercial business loans totaling $11.8 million, and 12 consumer and other loans totaling $200 thousand. The Company expects that TDR loans on accrual status as of September 30, 2020, which were all performing in accordance with their restructured terms, to continue to comply with the restructured terms because of the reduced principal or interest payments on these loans. TDR loans that were restructured at market interest rates and had sustained performance as agreed under the modified loan terms may be reclassified as non-TDR after each year end but are reserved for under ASC 310-10. The Company recorded an allowance totaling $4.9 million and $3.1 million for TDR loans as of September 30, 2020 and December 31, 2019, respectively. The following tables present the recorded investment of loans classified as TDR during the three and nine months ended September 30, 2020 and 2019 by class of loans: Three Months Ended September 30, 2020 Three Months Ended September 30, 2019 Number of Loans Balance Number of Loans Balance (Dollars in thousands) Real estate – residential — $ — — $ — Real estate – commercial Retail 1 1,007 1 328 Hotel & motel — — 1 574 Gas station & car wash — — — — Mixed use 1 767 — — Industrial & warehouse — — — — Other — — — — Real estate – construction — — — — Commercial business — — 2 169 Residential mortgage — — — — Consumer and other 2 11 — — Total 4 $ 1,785 4 $ 1,071 For the Nine Months Ended September 30, 2020 For the Nine Months Ended September 30, 2019 Number of Loans Balance Number of Loans Balance (Dollars in thousands) Real estate – residential — $ — — $ — Real estate – commercial Retail 2 1,613 3 449 Hotel & motel — — 3 1,439 Gas station & car wash 2 515 — — Mixed use 2 1,233 — — Industrial & warehouse 1 259 — — Other — — 3 1,055 Real estate – construction — — — — Commercial business 2 481 14 2,999 Residential mortgage — — — — Consumer and other 6 34 10 55 Total 15 $ 4,135 33 $ 5,997 For TDRs modified during the three and nine months ended September 30, 2020, the Company recorded $342 thousand and $661 thousand, respectively in ACL. Total charge-offs of TDR loans modified d

Leases

Leases	9 Months Ended
	Sep. 30, 2020
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 10 years as of September 30, 2020. 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, 2020, ROU assets and related liabilities were $52.3 million and $54.8 million, respectively. At September 30, 2020, the short term operating lease liability totaled $13.7 million and the long-term operating lease liability totaled $41.1 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, 2020. During the nine months ended September 30, 2020, the Company extended six leases and entered into no new lease contracts. Lease extensions terms ranged from twenty-two months to five years and the Company reassessed the ROU assets and lease liabilities 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 September 30, For the Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in thousands) Operating lease cost $ 3,928 $ 3,850 $ 11,752 $ 12,130 Short term lease cost — — — 9 Variable lease cost 864 875 2,403 2,411 Sublease income (169) (157) (595) (470) Net lease cost $ 4,623 $ 4,568 $ 13,560 $ 14,080 Rent expense for the three and nine months ended September 30, 2020 was $4.6 million and $13.7 million, respectively. Rent expense for the three and nine months ended September 30, 2019 was $4.6 million and $14.2 million, respectively. The table below summarizes other information related to the Company’s operating leases: At or for the Nine 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 $ 11,320 $ 11,021 Right-of-use assets obtained in exchange for lease liabilities, net — 65,263 Weighted-average remaining lease term - operating leases 5.3 years 6.0 years Weighted-average discount rate - operating leases 2.99 % 3.11 % The table below summarizes the maturity of remaining lease liabilities: September 30, 2020 (Dollars in thousands) 2020 $ 3,806 2021 14,796 2022 10,615 2023 8,402 2024 6,769 2025 and thereafter 15,251 Total lease payments 59,639 Less: imputed interest 4,841 Total lease obligations $ 54,798 As of September 30, 2020, the Company did not have any additional operating lease commitments that have not yet commenced.

Deposits

Deposits	9 Months Ended
	Sep. 30, 2020
Deposits [Abstract]
Deposits	Deposits The aggregate amounts of time deposits in denominations of more than $250 thousand at September 30, 2020 and December 31, 2019, was $1.98 billion and $1.86 billion, respectively. Included in time deposits of more than $250 thousand were $300.0 million in California State Treasurer’s deposits at September 30, 2020 and December 31, 2019. 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, 2020 and December 31, 2019, securities with fair values of approximately $360.9 million and $333.2 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, 2020 and December 31, 2019, totaled $1.00 billion and $1.48 billion, respectively. Brokered deposits at September 30, 2020 consisted of $501.0 million in money market and NOW accounts and $500.6 million in time deposits accounts. Brokered deposits at December 31, 2019 consisted of $538.2 million in money market and NOW accounts and $940.5 million in time deposit accounts. The following is breakdown of the Company’s deposits at September 30, 2020 and December 31, 2019: At September 30, 2020 At December 31, 2019 Balance Percentage (%) Balance Percentage (%) (Dollars in thousands) Noninterest bearing demand deposits $ 4,488,529 32 % $ 3,108,687 25 % Money market and NOW accounts 4,763,893 34 % 3,985,556 32 % Saving deposits 308,943 2 % 274,151 2 % Time deposits 4,446,991 32 % 5,158,970 41 % Total deposits $ 14,008,356 100 % $ 12,527,364 100 %

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2020
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 $4.29 billion at September 30, 2020, and $3.85 billion at December 31, 2019. 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 $81.2 million at September 30, 2020 and $95.0 million at December 31, 2019. At September 30, 2020 and December 31, 2019, loans with a carrying amount of approximately $7.02 billion and $6.76 billion, respectively, were pledged at the FHLB for outstanding advances and remaining borrowing capacity. At September 30, 2020 and December 31, 2019, 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, 2020 and December 31, 2019, FHLB advances totaled $200.0 million and $625.0 million, respectively, and had weighted average interest rates of 1.32% and 1.84%, respectively. FHLB advances at September 30, 2020 and December 31, 2019 had various maturities through December 2022. The interest rates of FHLB advances as of September 30, 2020 ranged between 0.25% and 2.39%. During the third quarter of 2020, the Company incurred a $3.6 million prepayment penalty related to the early payoff of $300.0 million in FHLB borrowings. At September 30, 2020, the Company’s remaining borrowing capacity with the FHLB was $4.05 billion. The Company maintains unsecured borrowing lines with other banks. There were no federal funds purchased from other banks at September 30, 2020 and December 31, 2019. At September 30, 2020, the contractual maturities for outstanding FHLB advances were as follows: September 30, 2020 Scheduled maturities in: (Dollars in thousands) 2020 $ 100,000 2021 — 2022 100,000 Total $ 200,000 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 99% of the fair market value of the qualifying loans and securities that are pledged. At September 30, 2020, the outstanding principal balance of the qualifying loans pledged at the FRB was $812.5 million and there was one investment security pledged to borrow against the discount window with book value totaling $5.9 million. At September 30, 2020 and December 31, 2019, the total available borrowing capacity at the FRB discount window was $631.5 million and $740.6 million, respectively. There were no borrowings outstanding with the FRB discount window as of September 30, 2020 and December 31, 2019.

Subordinated Debentures and Con

Subordinated Debentures and Convertible Notes	9 Months Ended
	Sep. 30, 2020
Subordinated Borrowings [Abstract]
Subordinated Debentures and Convertible Notes	Subordinated Debentures and Convertible Notes Subordinated Debt At September 30, 2020, 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, 2020: Issuance Trust Issuance Trust Carrying Rate Current Rate Maturity (Dollars in thousands) Nara Capital Trust III 06/05/2003 $ 5,000 $ 5,155 Variable 3.40% 06/15/2033 Nara Statutory Trust IV 12/22/2003 5,000 5,155 Variable 3.13% 01/07/2034 Nara Statutory Trust V 12/17/2003 10,000 10,310 Variable 3.20% 12/17/2033 Nara Statutory Trust VI 03/22/2007 8,000 8,248 Variable 1.90% 06/15/2037 Center Capital Trust I 12/30/2003 18,000 14,400 Variable 3.13% 01/07/2034 Wilshire Trust II 03/17/2005 20,000 15,911 Variable 2.04% 03/17/2035 Wilshire Trust III 09/15/2005 15,000 11,277 Variable 1.65% 09/15/2035 Wilshire Trust IV 07/10/2007 25,000 18,259 Variable 1.63% 09/15/2037 Saehan Capital Trust I 03/30/2007 20,000 15,174 Variable 1.84% 06/30/2037 Total $ 126,000 $ 103,889 The carrying value of Debentures at September 30, 2020 and December 31, 2019 was $103.9 million and $103.0 million, respectively. At September 30, 2020 and December 31, 2019, acquired Debentures had remaining discounts of $26.0 million and $26.9 million, respectively. 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, 2020 and December 31, 2019 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 In 2018, the Company issued $217.5 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. 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 22.50% 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. 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 the carrying value as of September 30, 2020 and December 31, 2019 are presented in the tables below: As of September 30, 2020 Amortization/ Gross Accumulated Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 217,500 $ — $ 217,500 Discount 5 years (21,880) 9,861 (12,019) Issuance costs to be capitalized 5 years (4,119) 1,908 (2,211) Carrying balance of convertible notes $ 191,501 $ 11,769 $ 203,270 As of December 31, 2019 Amortization/ Gross Accumulated Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 217,500 $ — $ 217,500 Discount 5 years (21,880) 6,659 (15,221) Issuance costs to be capitalized 5 years (4,119) 1,298 (2,821) Carrying balance of convertible notes $ 191,501 $ 7,957 $ 199,458 Interest expense on the convertible notes for the three and nine months ended September 30, 2020, totaled $2.4 million and $7.1 million, respectively. 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 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

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2020
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 as other income and fees. At September 30, 2020 and December 31, 2019, interest rate swaps related to the Company’s loan hedging program that were outstanding are presented in the following table: September 30, 2020 December 31, 2019 (Dollars in thousands) Interest rate swaps on loans with correspondent banks Notional amount $ — $ 137,890 Weighted average remaining term (years) — 7.2 Pay fixed rate (weighted average) — % 3.62 % Received variable rate (weighted average) — % 3.83 % Estimated fair value $ — $ 739 Interest rate swaps on loans with correspondent banks Notional amount $ 496,879 $ 282,326 Weighted average remaining term (years) 6.8 6.9 Pay fixed rate (weighted average) 3.90 % 4.48 % Received variable rate (weighted average) 2.28 % 3.98 % Estimated fair value $ (40,617) $ (9,614) Back to back interest rate swaps with loan customers Notional amount $ — $ 137,890 Weighted average remaining term (years) — 7.2 Received fixed rate (weighted average) — % 3.62 % Pay variable rate (weighted average) — % 3.83 % Estimated fair value $ — $ (739) Back to back interest rate swaps with loan customers Notional amount $ 496,879 $ 282,326 Weighted average remaining term (years) 6.8 6.9 Received fixed rate (weighted average) 3.90 % 4.48 % Pay variable rate (weighted average) 2.28 % 3.98 % Estimated fair value $ 40,617 $ 9,614 At September 30, 2020, the Company had one risk participation agreement with an outside counterparty for an interest rate swap related to a loan in which it is a participant. The risk participation agreement provides credit protection to the financial institution should the borrower fail to perform on its interest rate derivative contract. Risk participation agreements are credit derivatives not designated as hedges. Credit derivatives are not speculative and are not used to manage interest rate risk in assets or liabilities. Changes in the fair value in credit derivatives are recognized directly in earnings. The fee received, less the estimate of the loss for credit exposure, was recognized in earnings at the time of the transaction. At September 30, 2020, the notional amount of the risk participation agreement sold was $62.8 million with a credit valuation adjustment of $199 thousand. As part of the overall liability management, the Company utilizes interest rate swap agreements to help manage interest rate risk positions. The notional amount of the interest rate swaps do not represent the amount exchanged by the parties. The exchange of cash flows is determined by reference to the notional amounts and the other terms of the interest rate swap agreements. The Company had one existing interest rate swap agreement as of September 30, 2020 with a notional amount of $100.0 million designated as cash flow hedges of certain LIBOR-based debt. The swap was entered into during the second quarter of 2020 and was determined to be fully effective during the period presented. The aggregate fair value of the swap is recorded in derivative liabilities with changes in fair value recorded in other comprehensive income. The gain or loss on the derivative is recorded in accumulated other comprehensive income (“AOCI”) and is subsequently reclassified into interest expense and interest income in the period during which the hedged forecasted transaction affects earnings. Amounts reported in AOCI related to interest rate swap derivatives will be reclassified to interest income and interest expense as interest payments are received or paid on the Company’s derivatives. The Company expects the hedge to remain fully effective during the remaining term of the swap. For the three and nine months ended September 30, 2020, the Company reclassified $(21) thousand and $118 thousand from accumulated other comprehensive income to interest expense, respectively. There were no reclassifications from accumulated comprehensive income to interest expense during three and nine months ended September 30, 2019. September 30, 2020 December 31, 2019 (Dollars in thousands) Interest rate swaps designated as cash flow hedge (included in other liabilities) Notional amount $ 100,000 $ — Weighted average remaining term (years) 4.5 — Received variable rate (weighted average) 0.40 % — % Pay fixed rate (weighted average) 0.49 % — % Estimated fair value $ (796) $ — 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, 2020, the Company had approximately $31.7 million in interest rate lock commitments and total forward sales commitments for the future delivery of residential mortgage loans. At December 31, 2019, the Company had approximately $10.5 million 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, 2020 As of December 31, 2019 Notional Amount Fair Value Notional Amount Fair Value (Dollars in thousands) Assets: Interest rate lock commitments $ 31,689 $ 757 $ 10,540 $ 84 Forward sale contracts related to mortgage banking $ — $ — $ 4,532 $ 11 Liabilities: Interest rate lock commitments $ — $ — $ — $ — Forward sale contracts related to mortgage banking $ 31,689 $ (445) $ 6,008 $ (16)

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2020
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, and commitments to fund investments in affordable housing partnerships. 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, 2020 and December 31, 2019 are summarized as follows: September 30, 2020 December 31, 2019 (Dollars in thousands) Commitments to extend credit $ 2,184,404 $ 1,864,947 Standby letters of credit 118,509 113,720 Other letters of credit 32,228 37,627 Commitments to fund investments in affordable housing partnerships 16,975 28,481 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 $1.4 million at September 30, 2020 and $440 thousand at December 31, 2019. It is reasonably possible that 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, 2020
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, 2019, the Company assessed the qualitative factors related to intangible assets and goodwill for the year to determine whether it was more-likely-than-not that the fair value of the Company was less than its carrying amount. As the Company operates as single business unit, goodwill impairment is assessed based on the Company as a whole. 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 the Company exceeded the carrying value. Goodwill is not amortized for book purposes and is not tax deductible. Due to the recent COVID-19 pandemic, future expected economic performance has deteriorated substantially. In addition, U.S. equity markets experienced a significant decline since the first quarter of 2020. In line with these trends, the Company’s stock price also experienced a large reduction during the nine months ended September 30, 2020 where it continued to trade below the Company’s tangible book value. These factors contributed to the Company performing an interim goodwill impairment analysis during the third quarter of 2020. The Company determined that a Step 1 goodwill impairment analysis was warranted as of September 30, 2020. The Company performed a Step 1 fair value assessment and determined that goodwill was not impaired as of September 30, 2020 as the fair value of the reporting unit exceeded the book value. As the Company operates as a single reporting unit, the fair value of the Company as a whole was estimated. Therefore, there was no impairment of goodwill recorded during the three and nine months ended September 30, 2020. The carrying amount of the Company’s goodwill as of September 30, 2020 and December 31, 2019 was $464.5 million. Core deposit intangible assets are amortized over their estimated lives, which range from seven As of September 30, 2020 As of December 31, 2019 Core Deposit Intangibles Related To: Amortization Period Gross Accumulated 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 (603) 1 (602) 2 Foster Bankshares acquisition 10 years 2,763 (2,272) 491 (2,120) 643 Wilshire Bancorp acquisition 10 years 18,138 (8,391) 9,747 (6,950) 11,188 Total $ 25,605 $ (15,366) $ 10,239 $ (13,772) $ 11,833 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, 2020 and December 31, 2019, 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, 2020 and 2019 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in thousands) Balance at beginning of period $ 14,164 $ 19,997 $ 16,417 $ 23,132 Additions through originations of servicing assets 1,190 437 2,326 1,383 Amortization (1,636) (2,569) (5,025) (6,650) Balance at end of period $ 13,718 $ 17,865 $ 13,718 $ 17,865 Loans serviced for others are not reported as assets. The principal balances of loans serviced for other institutions were $1.28 billion as of September 30, 2020 and $1.35 billion as of December 31, 2019. 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, 2020 and December 31, 2019 are presented below. September 30, 2020 December 31, 2019 SBA Servicing Assets: Weighted-average discount rate 10.21% 9.19% Constant prepayment rate 14.56% 14.17% Mortgage Servicing Assets: Weighted-average discount rate 8.38% 9.25% Constant prepayment rate 8.55% 9.57%

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three months ended September 30, 2020, the Company had an income tax provision totaling $9.3 million on pretax income of $39.7 million, representing an effective tax rate of 23.28%, compared with an income tax provision of $14.6 million on pretax income of $57.2 million, representing an effective tax rate of 25.48% for the three months ended September 30, 2019. For the nine months ended September 30, 2020, the Company had an income tax provision totaling $25.5 million on pretax income of $108.7 million, representing an effective tax rate of 23.45%, compared with an income tax provision of $43.3 million on pretax income of $171.3 million, representing an effective tax rate of 25.26% for the nine months ended September 30, 2019. The reduction in effective tax rate for the three and nine months ended September 30, 2020 compared to periods 2019 was primarily due to affordable housing partnership investment tax credits benefit having a larger effect on lower annual projected pre-tax book income. 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 $68 thousand at September 30, 2020 and $141 thousand at December 31, 2019, 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 $17 thousand and $34 thousand, for accrued interest (no portion was related to penalties) at September 30, 2020 and December 31, 2019, respectively. Management believes it is reasonably possible that the unrecognized tax benefits may decrease by $68 thousand 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 return 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. During 2020, New York State Department of Taxation and Finance concluded the 2016, 2017, and 2018 examination and State of Ohio Department of Taxation concluded the examination for 2015, 2016, 2017, 2018, and 2019 tax years with no material adjustments. The Company is currently under examination by the New York City Department of Finance for the 2016, 2017, and 2018 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, 2020.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2020
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 is classified as Level 2. Other Derivatives Other derivatives consist of interest rate swaps designated as cash flow hedges and risk participation agreements. The fair values of these other derivative financial instruments are based upon the estimated amount the Company would receive or pay to terminate the instruments, taking into account current interest rates and, when appropriate, the current credit worthiness of the counterparties. Interest rate swaps designated as cash flow hedges are classified within Level 2. Credit derivatives such as risk participation agreements are valued based on credit worthiness of the underlying borrower which is a significant unobservable input and therefore is classified as Level 3. Collateral Dependent Loans The fair values of collateral dependent loans are generally measured for ACL using the practical expedients permitted by ASC 326-20-35-5 including collateral dependent 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 a 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, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Securities available for sale: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 793,596 $ — $ 793,596 $ — Mortgage-backed securities: Residential 676,739 — 676,739 — Commercial 500,724 — 500,724 — Corporate securities 3,888 — 3,888 — Municipal securities 86,044 — 84,996 1,048 Equity investments with readily determinable fair value 22,665 22,665 — — Interest rate swaps 40,617 — 40,617 — Mortgage banking derivatives 757 — 757 — Liabilities: Interest rate swaps 40,617 — 40,617 — Mortgage banking derivatives 445 — 445 — Other derivatives 995 — 796 199 Fair Value Measurements at the End of December 31, 2019 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Securities available for sale: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 736,655 $ — $ 736,655 $ — Mortgage-backed securities: Residential 352,897 — 352,897 — Commercial 552,124 — 552,124 — Corporate securities 4,200 — 4,200 — Municipal securities 70,111 — 69,035 1,076 Equity investments with readily determinable fair value 22,123 22,123 — — Interest rate swaps 10,353 — 10,353 — Mortgage banking derivatives 95 — 95 — Liabilities: Interest rate swaps 10,353 — 10,353 — Mortgage banking derivatives 16 — 16 — There were no transfers between Level 1, 2, and 3 during the three and nine months ended September 30, 2020 and 2019. 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, 2020 and 2019: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in thousands) Beginning Balance $ 1,066 $ 1,087 $ 1,076 $ 1,059 Change in fair value included in other comprehensive income (loss) (18) 21 (28) 49 Ending Balance $ 1,048 $ 1,108 $ 1,048 $ 1,108 The Company measures certain assets at fair value on a non-recurring basis including collateral dependent loans (excludes PCI loans at December 31, 2019), loans held for sale, and OREO. These fair value adjustments result from individually evaluated ACL 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 September 30, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Collateral dependent loans at fair value: Real estate loans $ 33,012 $ — $ — $ 33,012 Commercial business 9,876 — — 9,876 Consumer 11 — — 11 OREO 17,549 — — 17,549 Fair Value Measurements at the End of December 31, 2019 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Collateral dependent loans at fair value: Real estate loans $ 9,519 $ — $ — $ 9,519 Commercial business 8,942 — — 8,942 OREO 19,086 — — 19,086 For assets measured at fair value on a non-recurring basis, the total net gains (losses), which include charge offs, recoveries, recorded ACL, 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, 2020 2019 2020 2019 (Dollars in thousands) Assets: Collateral dependent loans at fair value: Real estate loans $ (5,951) $ (891) $ (8,108) $ 682 Commercial business (2,902) 1,630 (5,470) (2,270) Consumer — (276) — (904) Loans held for sale, net — (599) — (599) OREO (1,682) 1,277 (4,118) 1,112 Fair Value of Financial Instruments Carrying amounts and estimated fair values of financial instruments, not previously presented, at September 30, 2020 and December 31, 2019 were as follows: September 30, 2020 Carrying Amount Estimated Fair Value Fair Value Measurement (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 629,133 $ 629,133 Level 1 Interest bearing deposits in other financial institutions 30,345 30,391 Level 2 Equity investments without readily determinable fair values 27,045 27,045 Level 2 Loans held for sale 9,170 9,420 Level 2 Loans receivable—net 12,940,376 12,958,185 Level 3 Accrued interest receivable 57,989 57,989 Level 2/3 Servicing assets, net 13,718 16,461 Level 3 Customers’ liabilities on acceptances 880 880 Level 2 Financial Liabilities: Noninterest bearing deposits $ 4,488,529 $ 4,488,529 Level 2 Saving and other interest bearing demand deposits 5,072,836 5,072,836 Level 2 Time deposits 4,446,991 4,460,696 Level 2 FHLB advances 200,000 204,938 Level 2 Convertible notes, net 203,270 181,613 Level 1 Subordinated debentures 103,889 93,804 Level 2 Accrued interest payable 21,991 21,991 Level 2 Acceptances outstanding 880 880 Level 2 December 31, 2019 Carrying Amount Estimated Fair Value Fair Value Measurement (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 698,567 $ 698,567 Level 1 Interest bearing deposits in other financial institutions 29,162 29,235 Level 2 Equity investments without readily determinable fair values 26,967 26,967 Level 2 Loans held for sale 54,271 56,011 Level 2 Loans receivable—net 12,181,863 12,143,727 Level 3 Accrued interest receivable 30,772 30,772 Level 2/3 Servicing assets, net 16,417 18,966 Level 3 Customers’ liabilities on acceptances 1,117 1,117 Level 2 Financial Liabilities: Noninterest bearing deposits $ 3,108,687 $ 3,108,687 Level 2 Saving and other interest bearing demand deposits 4,259,707 4,259,707 Level 2 Time deposits 5,158,970 5,182,405 Level 2 FHLB advances 625,000 628,903 Level 2 Convertible notes, net 199,458 206,210 Level 1 Subordinated debentures 103,035 114,690 Level 2 Accrued interest payable 33,810 33,810 Level 2 Acceptances outstanding 1,117 1,117 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. The fair value of loans 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 include 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 incorporate 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, 2020
Equity [Abstract]
Stockholders’ Equity	Stockholders’ Equity Total stockholders’ equity at September 30, 2020 was $2.04 billion, compared to $2.04 billion at December 31, 2019. In March 2020, the Company completed the $50.0 million repurchase plan though the repurchase of 2,716,034 shares of common stock totaling $36.2 million. There were no shares repurchased during the three months ended September 30, 2020. As of September 30, 2020, the Company had repurchased a total of 12,661,581 shares of its common stock totaling $200.0 million as part of all previous repurchase programs that were authorized by the Company’s Board of Directors. The Company paid dividends of $0.14 per common share for both the third quarter of 2020 and 2019. For both the nine months ended September 30, 2020 and 2019, the Company paid dividends of $0.42 per common share. The following table presents the quarterly changes to accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2020 and 2019: Three Months Ended, Nine Months Ended, September 30, 2020 September 30, 2019 September 30, 2020 September 30, 2019 (Dollars in thousands) Balance at beginning of period $ 38,149 $ 7,423 $ 9,149 $ (32,705) Unrealized gain on securities available for sale (303) 14,160 41,820 71,349 Unrealized loss on interest rate swaps used for cash flow hedge 54 — (796) — Reclassification adjustments for net gains realize in net income (7,510) (153) (7,649) (282) Tax effect 2,292 (4,157) (9,842) (21,089) Total other comprehensive income (loss) $ (5,467) $ 9,850 $ 23,533 $ 49,978 Balance at end of period $ 32,682 $ 17,273 $ 32,682 $ 17,273 Reclassifications for net gains realized in net income for the three and nine months ended September 30, 2020 relate to net gains from the sale of investment securities and gains on interest rate swaps used for cash flow hedges. Gains on interest rate swaps are recorded in noninterest income under other income and fee in the Consolidated Statements of Income. Reclassifications for net gains realized in net income for the three and nine months ended September 30, 2019 relate to investment securities sold and is recorded in net gains on sales of securities available for sale in the Consolidated Statements of Income. For the three and nine months ended September 30, 2020 and 2019, the Company recorded reclassification adjustments of $7.5 million and $7.6 million, respectively, from other comprehensive income to net gains on sales of securities available for sale and gains and losses from cash flow hedge relationships. For 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 of securities available for sale.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation 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 potentially consultants with appropriate equity-based awards to; (ii) motivate high levels of performance; (iii) recognize employee and potentially consultants’ 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 2019 Plan, the exercise price for SARs and NQSOs may not be less than 100% of fair market value on the date of grant. Performance units are awarded to 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 Under the 2019 Plan, 2,933,222 shares were available for future grants as of September 30, 2020. 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 the Company’s stock option activity for the nine months ended September 30, 2020: Number of Shares Weighted-Average Exercise Price Per Share Weighted-Average Aggregate Intrinsic Value (Dollars in thousands) Outstanding - January 1, 2020 935,211 $ 15.34 Granted — — Exercised — — Expired (21,495) 16.13 Forfeited (4,000) 17.18 Outstanding - September 30, 2020 909,716 $ 15.32 4.73 $ 267 Options exercisable - September 30, 2020 867,716 $ 15.23 4.67 $ 267 The following is a summary of the Company’s restricted stock and performance unit activity for the nine months ended September 30, 2020: Number of Shares Weighted-Average Grant Date Fair Value Outstanding (unvested) - January 1, 2020 1,035,744 $ 14.08 Granted 1,160,202 9.16 Vested (341,740) 14.97 Forfeited (121,391) 12.05 Outstanding (unvested) - September 30, 2020 1,732,815 $ 10.75 The total fair value of restricted stock and performance units vested for the nine months ended September 30, 2020 and 2019 was $3.3 million and $1.6 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 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 expense. The compensation expense for the ESPP during the three months ended September 30, 2020 and 2019 was $108 thousand and $57 thousand, respectively. The compensation expense for the ESPP during the nine months ended September 30, 2020 and 2019 was $205 thousand and $182 thousand, respectively. The total amounts charged against income related to stock-based payment arrangements, including the ESPP, were $2.2 million and $1.6 million for the three months ended September 30, 2020 and 2019, respectively. For the nine months ended September 30, 2020 and 2019, $6.0 million and $3.9 million, respectively, of stock-based payment arrangements were charged against income. The income tax benefit recognized was approximately $507 thousand and $400 thousand for the three months ended September 30, 2020 and 2019, respectively. The income tax benefit recognized for the nine months ended September 30, 2020 and 2019, was approximately $1.4 million and $984 thousand, respectively. At September 30, 2020, the unrecognized compensation expense related to non-vested stock option grants was $125 thousand and is expected to be recognized over a weighted average vesting period of 0.92 years. Unrecognized compensation expense related to non-vested restricted stock and performance units was $10.7 million and is expected to be recognized over a weighted average vesting period of 1.75 years.

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2020
Banking Regulation [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. As of September 30, 2020, the capital ratios for the Company and the Bank were in excess of all regulatory minimum capital ratios with the addition of the conservation buffer. With the adoption of the CECL standard As of September 30, 2020 and December 31, 2019, 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 tables below for the dates indicated: Actual Required For Capital Adequacy Purposes Minimum Capital Adequacy Required To Be Well Capitalized As of September 30, 2020 Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) Common equity Tier 1 capital Company $ 1,554,838 11.36 % $ 616,132 4.50 % $ 958,428 7.00 % N/A N/A Bank $ 1,835,738 13.41 % $ 616,072 4.50 % $ 958,334 7.00 % $ 889,882 6.50 % Total capital Company $ 1,806,112 13.19 % $ 1,095,346 8.00 % $ 1,437,641 10.50 % N/A N/A Bank $ 1,987,025 14.51 % $ 1,095,239 8.00 % $ 1,437,501 10.50 % $ 1,369,049 10.00 % Tier 1 capital Company $ 1,654,826 12.09 % $ 821,509 6.00 % $ 1,163,805 8.50 % N/A N/A Bank $ 1,835,738 13.41 % $ 821,429 6.00 % $ 1,163,692 8.50 % $ 1,095,239 8.00 % Tier 1 capital Company $ 1,654,826 10.02 % $ 660,470 4.00 % N/A N/A N/A N/A Bank $ 1,835,738 11.12 % $ 660,464 4.00 % N/A N/A $ 825,580 5.00 % Actual Required For Capital Adequacy Purposes Minimum Capital Adequacy Required To Be Well Capitalized As of December 31, 2019 Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) Common equity Tier 1 capital Company $ 1,553,697 11.76 % $ 594,373 4.50 % $ 924,581 7.00 % N/A N/A Bank $ 1,811,862 13.72 % $ 594,320 4.50 % $ 924,498 7.00 % $ 858,462 6.50 % Total capital Company $ 1,747,611 13.23 % $ 1,056,664 8.00 % $ 1,386,871 10.50 % N/A N/A Bank $ 1,906,642 14.44 % $ 1,056,569 8.00 % $ 1,386,747 10.50 % $ 1,320,711 10.00 % Tier 1 capital Company $ 1,652,831 12.51 % $ 792,498 6.00 % $ 1,122,705 8.50 % N/A N/A Bank $ 1,811,862 13.72 % $ 792,427 6.00 % $ 1,122,605 8.50 % $ 1,056,569 8.00 % Tier 1 capital Company $ 1,652,831 11.22 % $ 589,367 4.00 % N/A N/A N/A N/A Bank $ 1,811,862 12.29 % $ 589,604 4.00 % N/A N/A $ 737,005 5.00 %

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition With the adoption of ASU 2014-09 (Topic 606), the Company recognizes revenue when obligations under the terms of a contract with customers are satisfied. 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, 2020 2019 2020 2019 (Dollars in thousands) Noninterest bearing deposit account income: Monthly service charges $ 303 $ 395 $ 1,001 $ 1,224 Customer analysis charges 1,693 2,194 5,074 5,788 NSF charges 608 1,887 2,824 5,754 Other service charges 110 195 484 605 Total noninterest bearing deposit account income 2,714 4,671 9,383 13,371 Interest bearing deposit account income: Monthly service charges 22 19 69 52 Total service fees on deposit accounts $ 2,736 $ 4,690 $ 9,452 $ 13,423 Wire transfer fee income: Wire transfer fees $ 812 $ 963 $ 2,383 $ 3,063 Foreign exchange fees 80 95 327 395 Total wire transfer fees $ 892 $ 1,058 $ 2,710 $ 3,458 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”

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2020
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, 2020 and December 31, 2019 and the results of operations for the three and nine months ended September 30, 2020 and 2019. 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.
Pending Accounting Pronouncements	Pending Accounting Pronouncements In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform: Facilitation of the Effects of Reference Rate Reform on Financial Reporting”. The amendments provide temporary, optional guidance to ease the potential burden in accounting for reference rate reform. The amendments provide optional expedients and exceptions for applying GAAP to transactions affected by reference rate reform if certain criteria are met. The amendments primarily include relief related to contract modifications and hedging relationships, as well as providing a one-time election for the sale or transfer of debt securities classified as held-to-maturity. This one time election may be made at any time after March 12, 2020, but no later than December 31, 2022. The Company is currently in the process of evaluating ASU 2020-04 to determine whether the Company will make this election and is currently assessing the significance of impact of modifying contracts in consideration of the election of this amendment.
Financing Receivables	On January 1, 2020 the Company adopted ASU 2016-13, “Measurement of Credit Losses on Financial Instruments”, or CECL which significantly changed the credit losses estimation model for loans and investments. The discussion below relates to the Company’s CECL allowance for credit losses (“ACL”) methodology. For a discussion of the Company’s former incurred loss allowance for loan losses methodology, please refer to the Company’s Annual Report on Form 10-K for the year ended December 31, 2019. The Company calculates its ACL by estimating expected credit losses on a collective basis for loans that share similar risk characteristics. Loans that do not share similar risk characteristics with other loans are evaluated for credit losses on an individual basis. The Company uses a combination of a modeled and non-modeled approach that incorporates current and future economic conditions to estimate lifetime expected losses on a collective basis. The Company uses Probability of Default (“PD”), Loss Given Default (“LGD”), and Exposure at Default (“EAD”) methodologies with quantitative factors and qualitative considerations in calculation of the allowance for credit losses for collectively assessed loans. The Company uses a reasonable and supportable period of 2 years at which point loss assumptions revert back to historical loss information by means of 1 year reversion period. The ACL for the Company’s construction, credit card, and certain consumer loans is calculated based on a non-modeled approach utilizing historical loss rates to estimate losses. A non-modeled approach was chosen for these loans as fewer data points exist which could result in high levels of estimated loss volatility under a modeled approach. In aggregate, non-modeled loans represented less than 3% of the Company’s total loan portfolio as of September 30, 2020. With the adoption of CECL, the Company formed an Economic Forecast Committee (“EFC”) to review economic forecast scenarios that are incorporated in the Company’s ACL. The EFC reviews multiple scenarios provided to the Company by an independent third party and chooses a single scenario that best aligns with management’s expectation of future economic conditions. The forecast scenario contains certain macroeconomic variables that are incorporated into the Company’s modeling process, including GDP, unemployment rates, interest rates, and commercial real estate prices. As of September 30, 2020, the Company chose a forecast scenario that incorporates the effect of the COVID-19 pandemic into estimates of future economic conditions. We experienced a large decline in GDP and an increase in unemployment for the first half of 2020 and the forecast scenarios project a return to GDP growth in the second half of 2020, while unemployment remains elevated through 2022. Additionally, in order to systematically quantify the credit risk impact of other trends and changes within the loan portfolio, the Company utilizes qualitative adjustments to the modeled and non-modeled estimated loss approaches. 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 25 basis points for each loan type pool. This matrix considers the following seven 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, updated to reflect the adoption of CECL: • Changes in lending policies and procedures, including underwriting standards and collection, charge off, and recovery practices; • 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; • 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. As of September 30, 2020, the Company recorded additional ACL as part of its modeled and qualitative assessments to account for the additional risks associated with the increase in loan modifications related to the COVID-19 pandemic and to account for the Company’s concentration of hotel/motel loans for which the industry was particularly hard hit by the pandemic. For loans which do not share similar risk characteristics such as nonaccrual and TDR loans above $500 thousand, the Company evaluates these loans on an individual basis in accordance with ASC 326. These nonaccrual and TDR loans are considered to have different risk profiles than performing loans and therefore are evaluated separately. The Company decided to collectively assess TDRs and nonaccrual loans with balances below $500 thousand along with the performing and accrual loans in order to reduce the operational burden of individually assessing small TDR and nonaccrual loans with immaterial balances. For individually assessed loans, the ACL is measured using either 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 loans, the Company obtains a new appraisal to determine the fair value of collateral. The appraisals are based on an “as-is” valuation. To ensure that appraised values remain current, the Company either obtains updated appraisals every twelve months from a qualified independent appraiser or an internal evaluation of the collateral is performed by qualified personnel. If the third party market data indicates that the value of the collateral property has declined since the most recent valuation date, management adjusts the value of the property downward to reflect current market conditions. If the fair value of the collateral is less than the amortized balance of the loan, the Company recognizes an ACL with a corresponding charge to the provision for credit losses. The Company maintains a separate ACL for its off-balance sheet unfunded loan commitments. The Company uses a funding rate to allocate the allowance to undrawn exposures. This funding rate is used as a credit conversion factor to capture how much undrawn can potentially become drawn at any point. The funding rate is determined based on a lookback period of 8 quarters. Credit loss is not estimated for off-balance sheet credit exposures that are unconditionally cancellable by the Company.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 and 2019. Three Months Ended September 30, 2020 2019 Net Income Weighted-Average Shares Earnings Net Income Weighted-Average Shares Earnings (Dollars in thousands, except share and per share data) Basic EPS - common stock $ 30,490 123,251,336 $ 0.25 $ 42,592 126,685,921 $ 0.34 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 285,429 321,548 Diluted EPS - common stock $ 30,490 123,536,765 $ 0.25 $ 42,592 127,007,469 $ 0.34 Nine Months Ended September 30, 2020 2019 Net Income Weighted-Average Shares Earnings Net Income Weighted-Average Shares Earnings (Dollars in thousands, except share and per share data) Basic EPS - common stock $ 83,196 123,581,055 $ 0.67 $ 128,031 126,661,798 $ 1.01 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 314,029 234,172 Diluted EPS - common stock $ 83,196 123,895,084 $ 0.67 $ 128,031 126,895,970 $ 1.01

Equity Investments (Tables)

Equity Investments (Tables)	9 Months Ended
	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Schedule Of Change In Fair Value For Equity Investment Securities	The changes in fair value for equity investments with readily determinable fair values for the three and nine months ended September 30, 2020 and 2019 were recorded in other noninterest income and fees as summarized in the table below: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in thousands) Net change in fair value recorded during the period on equity investments with readily determinable fair value $ — $ 168 $ 542 $ 1,393 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 $ 542 $ 1,393

Securities Available for Sale (

Securities Available for Sale (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 Amortized Gross Gross Allowance For (Dollars in thousands) Debt securities: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 779,720 $ 13,975 $ (99) $ — $ 793,596 Mortgage-backed securities: Residential 671,027 6,294 (582) — 676,739 Commercial 474,963 25,761 — — 500,724 Corporate securities 5,000 — (1,112) — 3,888 Municipal securities 83,845 2,199 — — 86,044 Total investment securities available for sale $ 2,014,555 $ 48,229 $ (1,793) $ — $ 2,060,991 At December 31, 2019 Amortized Gross Gross Allowance For (Dollars in thousands) Debt securities: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 735,094 $ 4,220 $ (2,659) N/A $ 736,655 Mortgage-backed securities: Residential 353,073 1,422 (1,598) N/A 352,897 Commercial 541,043 13,441 (2,360) N/A 552,124 Corporate securities 5,000 — (800) N/A 4,200 Municipal securities 69,631 831 (351) N/A 70,111 Total investment securities available for sale $ 1,703,841 $ 19,914 $ (7,768) N/A $ 1,715,987
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of investment securities at September 30, 2020, 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 Estimated (Dollars in thousands) Available for sale: Due within one year $ 350 $ 351 Due after one year through five years — — Due after five years through ten years 5,441 5,477 Due after ten years 83,054 84,104 U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations 779,720 793,596 Mortgage-backed securities: Residential 671,027 676,739 Commercial 474,963 500,724 Total $ 2,014,555 $ 2,060,991
Schedule of Gross Unrealized Losses and Estimated Fair Values of 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, 2020 Less than 12 months 12 months or longer Total Description of Number Fair Gross Number Fair Gross Number Fair Gross (Dollars in thousands) Collateralized mortgage obligations* 8 $ 94,580 $ (99) — $ — $ — 8 $ 94,580 $ (99) Mortgage-backed securities: Residential* 7 114,906 (582) — — — 7 114,906 (582) Commercial* — — — — — — — — — Corporate securities — — — 1 3,888 (1,112) 1 3,888 (1,112) Municipal securities — — — — — — — — — Total 15 $ 209,486 $ (681) 1 $ 3,888 $ (1,112) 16 $ 213,374 $ (1,793) __________________________________ * Investments in U.S. Government agency and U.S. Government sponsored enterprises As of December 31, 2019 Less than 12 months 12 months or longer Total Description of Number Fair Gross Number Fair Gross Number Fair Gross (Dollars in thousands) Collateralized mortgage obligations* 20 $ 108,236 $ (721) 32 $ 183,050 $ (1,938) 52 $ 291,286 $ (2,659) Mortgage-backed securities: Residential* 6 84,107 (267) 16 129,457 (1,331) 22 213,564 (1,598) Commercial* 7 68,452 (1,037) 5 73,697 (1,323) 12 142,149 (2,360) Corporate securities — — — 1 4,200 (800) 1 4,200 (800) Municipal securities 2 8,942 (39) 3 15,437 (312) 5 24,379 (351) Total 35 $ 269,737 $ (2,064) 57 $ 405,841 $ (5,704) 92 $ 675,578 $ (7,768) __________________________________ * Investments in U.S. Government agency and U.S. Government sponsored enterprises

Loans Receivable and Allowanc_2

Loans Receivable and Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Summary of Loans Receivable by Major Category	The following is a summary of loans receivable by major category: September 30, 2020 December 31, 2019 Loan portfolio composition (Dollars in thousands) Real estate loans: Residential $ 54,585 $ 52,558 Commercial 8,347,358 8,316,470 Construction 311,593 295,523 Total real estate loans 8,713,536 8,664,551 Commercial business 1 3,700,020 2,721,183 Residential mortgage 659,876 835,188 Consumer and other 46,793 55,085 Loans receivable 13,120,225 12,276,007 Allowance for credit losses (179,849) (94,144) Loans receivable, net of allowance for credit losses $ 12,940,376 $ 12,181,863 __________________________________ 1 Commercial Business loans as of September 30, 2020 includes $464.6 million in SBA Paycheck Protection Program Loans
Allowance for Credit Losses by Portfolio Segment	The tables below details the activity in the allowance for credit losses by portfolio segment for the three and nine months ended September 30, 2020 and 2019. Accrued interest receivable on loans totaled $53.5 million at September 30, 2020 and $26.2 million at December 31, 2019. Real Estate Commercial Business Residential Mortgage Consumer and Other Total (Dollars in thousands) Three Months Ended September 30, 2020 Balance, beginning of period $ 119,030 $ 35,493 $ 5,868 $ 1,380 $ 161,771 Provision (credit) for credit losses 15,748 7,265 (1,169) 156 22,000 Loans charged off (5,313) (800) — (237) (6,350) Recoveries of charge offs 159 2,251 — 18 2,428 Balance, end of period $ 129,624 $ 44,209 $ 4,699 $ 1,317 $ 179,849 Nine Months Ended September 30, 2020 Balance, beginning of period $ 53,593 $ 33,032 $ 5,925 $ 1,594 $ 94,144 CECL day 1 adoption 27,791 (1,022) (543) (26) 26,200 Provision (credit) for credit losses 55,773 11,663 (683) 747 67,500 Loans charged off (7,884) (4,294) — (1,033) (13,211) Recoveries of charge offs 351 4,830 — 35 5,216 Balance, end of period $ 129,624 $ 44,209 $ 4,699 $ 1,317 $ 179,849 Real Estate Commercial Business Residential Mortgage Consumer and Other Total (Dollars in thousands) Three Months Ended September 30, 2019 Balance, beginning of period $ 54,084 $ 32,364 $ 5,514 $ 2,104 $ 94,066 Provision (credit) for loan losses (87) 2,286 (207) 108 2,100 Loans charged off (1,197) (1,124) — (281) (2,602) Recoveries of charge offs 246 528 — 6 780 PCI allowance adjustment — — — (462) (462) Balance, end of period $ 53,046 $ 34,054 $ 5,307 $ 1,475 $ 93,882 Nine Months Ended September 30, 2019 Balance, beginning of period $ 56,767 $ 28,484 $ 5,207 $ 2,099 $ 92,557 Provision (credit) for loan losses (4,225) 9,693 176 656 6,300 Loans charged off (1,439) (4,083) (76) (834) (6,432) Recoveries of charge offs 1,943 838 — 16 2,797 PCI allowance adjustment — (878) — (462) (1,340) Balance, end of period $ 53,046 $ 34,054 $ 5,307 $ 1,475 $ 93,882 The following tables break out the allowance for credit losses and loan balance by measurement methodology at September 30, 2020 and December 31, 2019: September 30, 2020 Real Estate Commercial Business Residential Mortgage Consumer and Other Total (Dollars in thousands) Allowance for credit losses: Individually evaluated $ 2,339 $ 4,485 $ 21 $ 50 $ 6,895 Collectively evaluated 127,285 39,724 4,678 1,267 172,954 Total $ 129,624 $ 44,209 $ 4,699 $ 1,317 $ 179,849 Loans outstanding: Individually evaluated $ 76,025 $ 24,930 $ 3,775 $ 802 $ 105,532 Collectively evaluated 8,637,511 3,675,090 656,101 45,991 13,014,693 Total $ 8,713,536 $ 3,700,020 $ 659,876 $ 46,793 $ 13,120,225 December 31, 2019 Real Estate Commercial Business Residential Mortgage Consumer and Other Total (Dollars in thousands) Allowance for loan losses: Individually evaluated for impairment $ 312 $ 3,073 $ 10 $ 7 $ 3,402 Collectively evaluated for impairment 48,616 26,914 5,913 1,220 82,663 PCI loans 4,665 3,045 2 367 8,079 Total $ 53,593 $ 33,032 $ 5,925 $ 1,594 $ 94,144 Loans outstanding: Individually evaluated for impairment $ 64,684 $ 22,905 $ 2,762 $ 301 $ 90,652 Collectively evaluated for impairment 8,502,103 2,691,378 832,268 54,037 12,079,786 PCI loans 97,764 6,900 158 747 105,569 Total $ 8,664,551 $ 2,721,183 $ 835,188 $ 55,085 $ 12,276,007 The following tables present a breakdown of loans by recorded ACL, broken out by loans evaluated individually and collectively at September 30, 2020 and December 31, 2019: As of September 30, 2020 Real Estate – Real Estate – Real Estate – Commercial Residential Consumer Total (Dollars in thousands) Individually evaluated loans $ — $ 69,427 $ 6,598 $ 24,930 $ 3,775 $ 802 $ 105,532 ACL on individually evaluated loans $ — $ 2,339 $ — $ 4,485 $ 21 $ 50 $ 6,895 Individually evaluated loans ACL coverage N/A 3.37 % N/A 17.99 % 0.56 % 6.23 % 6.53 % Collectively evaluated loans $ 54,585 $ 8,277,931 $ 304,995 $ 3,675,090 $ 656,101 $ 45,991 $ 13,014,693 ACL on collectively evaluated loans $ 208 $ 125,144 $ 1,933 $ 39,724 $ 4,678 $ 1,267 $ 172,954 Collectively evaluated loans ACL coverage 0.38 % 1.51 % 0.63 % 1.08 % 0.71 % 2.75 % 1.33 % Total loans $ 54,585 $ 8,347,358 $ 311,593 $ 3,700,020 $ 659,876 $ 46,793 $ 13,120,225 Total ACL $ 208 $ 127,483 $ 1,933 $ 44,209 $ 4,699 $ 1,317 $ 179,849 Total ACL to total loans 0.38 % 1.53 % 0.62 % 1.19 % 0.71 % 2.81 % 1.37 % As of December 31, 2019 Real Estate – Real Estate – Real Estate – Commercial Residential Consumer Total (Dollars in thousands) Impaired loans (recorded investment) $ — $ 54,519 $ 10,165 $ 22,905 $ 2,762 $ 301 $ 90,652 Specific allowance $ — $ 312 $ — $ 3,073 $ 10 $ 7 $ 3,402 Specific allowance to impaired loans N/A 0.57 % — % 13.42 % 0.36 % 2.33 % 3.75 % Other loans $ 52,558 $ 8,261,951 $ 285,358 $ 2,698,278 $ 832,426 $ 54,784 $ 12,185,355 General allowance $ 204 $ 51,400 $ 1,677 $ 29,959 $ 5,915 $ 1,587 $ 90,742 General allowance to other loans 0.39 % 0.62 % 0.59 % 1.11 % 0.71 % 2.90 % 0.74 % Total loans $ 52,558 $ 8,316,470 $ 295,523 $ 2,721,183 $ 835,188 $ 55,085 $ 12,276,007 Total allowance for loan losses $ 204 $ 51,712 $ 1,677 $ 33,032 $ 5,925 $ 1,594 $ 94,144 Total allowance to total loans 0.39 % 0.62 % 0.57 % 1.21 % 0.71 % 2.89 % 0.77 %
Schedule of Nonaccrual Loans and Loans Past Due 90 or More Days And Still on Accrual Status	The tables below represent the recorded investment of nonaccrual loans and loans past due 90 or more days and still on accrual status by class of loans and broken out by loans with a recorded ACL and those without a recorded ACL as of September 30, 2020 and total nonaccrual loans and loans past due 90 or more days and still on accrual status by class of loans as of December 31, 2019. September 30, 2020 Nonaccrual with No ACL Nonaccrual with an ACL Total Nonaccrual (1) Accruing Loans Past Due 90 or More Days (Dollars in thousands) Real estate – residential $ — $ — $ — $ — Real estate – commercial Retail 8,023 3,688 11,711 — Hotel & motel 14,280 2,260 16,540 — Gas station & car wash 351 928 1,279 — Mixed use 1,531 815 2,346 293 Industrial & warehouse 4,618 1,950 6,568 — Other 4,576 2,121 6,697 — Real estate – construction 6,598 — 6,598 — Commercial business 4,351 8,671 13,022 — Residential mortgage 2,335 1,440 3,775 — Consumer and other — 669 669 1,244 Total $ 46,663 $ 22,542 $ 69,205 $ 1,537 December 31, 2019 Nonaccrual Loans (1)(2) Accruing Loans Past Due 90 or More Days (Dollars in thousands) Real estate – residential $ — $ — Real estate – commercial Retail 2,934 449 Hotel & motel 10,901 — Gas station & car wash 271 — Mixed use 665 634 Industrial & warehouse 10,544 — Other 5,455 919 Real estate – construction 10,165 3,850 Commercial business 10,893 1,096 Residential mortgage 2,753 — Consumer and other 204 599 Total $ 54,785 $ 7,547 __________________________________ (1) Total nonaccrual loans exclude the guaranteed portion of SBA loans that are in liquidation totaling $26.2 million and $28.1 million, at September 30, 2020 and December 31, 2019, respectively. (2) Nonaccrual loans exclude PCI loans of $18.3 million at December 31, 2019.
Amortized Cost Basis of Collateral-Dependent Loans	The following table presents the amortized cost basis of collateral-dependent loans as of September 30, 2020: September 30, 2020 Real Estate Collateral Other Collateral Total (Dollars in thousands) Real Estate - Residential $ — $ — $ — Real Estate - Commercial 55,024 — 55,024 Real Estate - Construction 6,598 — 6,598 Commercial Business 7,581 5,415 12,996 Residential Mortgage 2,335 — 2,335 Consumer and Other 11 — 11 Total $ 71,549 $ 5,415 $ 76,964
Aging of Past Due Loans	The following table presents 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, 2020 and December 31, 2019 by class of loans: As of September 30, 2020 As of December 31, 2019 30-59 Days 60-89 Days 90 or More Days Total 30-59 Days 60-89 Days 90 or More Days Total (1) (Dollars in thousands) Real estate – residential $ — $ — $ — $ — $ — $ — $ — $ — Real estate – commercial Retail 328 44,776 10,074 55,178 1,083 1,424 3,037 5,544 Hotel & motel 534 2,081 13,679 16,294 1,346 936 6,409 8,691 Gas station & car wash 461 — 763 1,224 997 2,038 196 3,231 Mixed use 551 — 1,348 1,899 593 — 801 1,394 Industrial & warehouse 467 1,095 3,735 5,297 94 45 3,946 4,085 Other 2,054 2,671 1,120 5,845 811 785 3,704 5,300 Real estate – construction — 8,122 6,598 14,720 — — 14,015 14,015 Commercial business 638 575 6,740 7,953 401 352 5,717 6,470 Residential mortgage 1,185 2,456 2,821 6,462 9,676 792 2,038 12,506 Consumer and other 66 509 1,853 2,428 176 122 614 912 Total Past Due $ 6,284 $ 62,285 $ 48,731 $ 117,300 $ 15,177 $ 6,494 $ 40,477 $ 62,148 __________________________________ (1) Past due loans at December 31, 2019 exclude PCI loans totaling $15.0 million.
Financing Receivable Credit Quality Indicators	The following table presents the amortized cost basis of loans receivable by class, credit quality indicator, and year of origination as of September 30, 2020. As of September 30, 2020 Term Loan by Origination Year Revolving Loans Total 2020 2019 2018 2017 2016 Prior (Dollars in thousands) Real Estate - Residential Pass/Not Rated $ 5,818 $ 16,509 $ 11,599 $ 4,352 $ 7,592 $ 5,061 $ 3,429 $ 54,360 Special mention — — — — — — — — Substandard — — 140 — — 85 — 225 Doubtful/Loss — — — — — — — — Subtotal $ 5,818 $ 16,509 $ 11,739 $ 4,352 $ 7,592 $ 5,146 $ 3,429 $ 54,585 Real Estate - Commercial Pass/Not Rated $ 1,112,640 $ 1,587,016 $ 1,605,796 $ 1,297,459 $ 868,639 $ 1,468,638 $ 104,518 $ 8,044,706 Special mention — 2,047 12,923 17,203 1,681 10,082 — 43,936 Substandard — 12,090 25,640 24,666 41,610 151,514 3,196 258,716 Doubtful/Loss — — — — — — — — Subtotal $ 1,112,640 $ 1,601,153 $ 1,644,359 $ 1,339,328 $ 911,930 $ 1,630,234 $ 107,714 $ 8,347,358 Real Estate - Construction Pass/Not Rated $ 29,382 $ 38,336 $ 109,419 $ 82,598 $ 5,608 $ 10,031 $ — $ 275,374 Special mention — — — — 5,774 5,124 — 10,898 Substandard — — — 10,601 — 8,122 — 18,723 Doubtful/Loss — — — 6,598 — — — 6,598 Subtotal $ 29,382 $ 38,336 $ 109,419 $ 99,797 $ 11,382 $ 23,277 $ — $ 311,593 Commercial Business Pass/Not Rated $ 979,904 $ 628,028 $ 246,008 $ 134,655 $ 90,613 $ 55,025 $ 1,437,781 $ 3,572,014 Special mention 5,990 27,099 31,111 15,083 6,503 3,007 9,644 98,437 Substandard 1,485 851 6,534 4,459 6,864 5,071 4,263 29,527 Doubtful/Loss — — — — 42 — — 42 Subtotal $ 987,379 $ 655,978 $ 283,653 $ 154,197 $ 104,022 $ 63,103 $ 1,451,688 $ 3,700,020 Residential Mortgage Pass/Not Rated $ 4,881 $ 111,963 $ 251,894 $ 184,337 $ 60,122 $ 42,747 $ — $ 655,944 Special mention — — — — — — — — Substandard — 122 1,448 — 1,717 645 — 3,932 Doubtful/Loss — — — — — — — — Subtotal $ 4,881 $ 112,085 $ 253,342 $ 184,337 $ 61,839 $ 43,392 $ — $ 659,876 Consumer and Other Pass/Not Rated $ 5,747 $ 2,602 $ 2,051 $ 2,687 $ 5,203 $ 2,881 $ 24,726 $ 45,897 Special mention — — — 117 — — — 117 Substandard — — — — 40 739 — 779 Doubtful/Loss — — — — — — — — Subtotal $ 5,747 $ 2,602 $ 2,051 $ 2,804 $ 5,243 $ 3,620 $ 24,726 $ 46,793 Total Loans Pass/Not Rated $ 2,138,372 $ 2,384,454 $ 2,226,767 $ 1,706,088 $ 1,037,777 $ 1,584,383 $ 1,570,454 $ 12,648,295 Special mention 5,990 29,146 44,034 32,403 13,958 18,213 9,644 153,388 Substandard 1,485 13,063 33,762 39,726 50,231 166,176 7,459 311,902 Doubtful/Loss — — — 6,598 42 — — 6,640 Total $ 2,145,847 $ 2,426,663 $ 2,304,563 $ 1,784,815 $ 1,102,008 $ 1,768,772 $ 1,587,557 $ 13,120,225 The following table presents the recorded investment in the Company’s loans by loan class and credit risk rating as of December 31, 2019. As of December 31, 2019 Pass/Not Rated Special Mention Substandard Doubtful Total (Dollars in thousands) Real estate – residential $ 52,096 $ — $ 462 $ — $ 52,558 Real estate – commercial 8,039,751 78,519 198,200 — 8,316,470 Real estate – construction 253,173 24,620 17,730 — 295,523 Commercial business 2,643,814 38,185 39,171 13 2,721,183 Residential mortgage 832,149 — 3,039 — 835,188 Consumer and other 53,966 166 953 — 55,085 Total $ 11,874,949 $ 141,490 $ 259,555 $ 13 $ 12,276,007
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, 2020 and 2019 is presented in the following table: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Transfer of loans held for investment to held for sale (Dollars in thousands) Real estate - commercial $ — $ 25,988 $ — $ 25,988 Residential mortgage — — 1,002 82,991 Total $ — $ 25,988 $ 1,002 $ 108,979
Troubled Debt Restructurings	A summary of the recorded investment of TDR loans on accrual and nonaccrual status by type of concession as of September 30, 2020 and December 31, 2019 is presented below: As of September 30, 2020 TDR Loans on Accrual Status TDR Loans on Nonaccrual Status Total TDRs Real Estate Commercial Business Residential Mortgage Other Real Estate Commercial Business Residential Mortgage Other (Dollars in thousands) Payment concession $ 5,944 $ 925 $ — $ 41 $ 7,323 $ 332 $ — $ — $ 14,565 Maturity / amortization concession 11,874 10,730 — 93 178 4,244 — 118 27,237 Rate concession 5,822 — — — 439 1,434 — — 7,695 Total $ 23,640 $ 11,655 $ — $ 134 $ 7,940 $ 6,010 $ — $ 118 $ 49,497 As of December 31, 2019 TDR Loans on Accrual Status TDR Loans on Nonaccrual Status Total Real Estate Commercial Business Residential Mortgage Other Real Estate Commercial Business Residential Mortgage Other (Dollars in thousands) Payment concession $ 4,708 $ 886 $ — $ 54 $ 4,306 $ 259 $ — $ — $ 10,213 Maturity / amortization concession 14,537 10,778 — 43 — 5,931 — 122 31,411 Rate concession 4,419 181 — 103 334 65 — — 5,102 Total $ 23,664 $ 11,845 $ — $ 200 $ 4,640 $ 6,255 $ — $ 122 $ 46,726 The following tables present the recorded investment of loans classified as TDR during the three and nine months ended September 30, 2020 and 2019 by class of loans: Three Months Ended September 30, 2020 Three Months Ended September 30, 2019 Number of Loans Balance Number of Loans Balance (Dollars in thousands) Real estate – residential — $ — — $ — Real estate – commercial Retail 1 1,007 1 328 Hotel & motel — — 1 574 Gas station & car wash — — — — Mixed use 1 767 — — Industrial & warehouse — — — — Other — — — — Real estate – construction — — — — Commercial business — — 2 169 Residential mortgage — — — — Consumer and other 2 11 — — Total 4 $ 1,785 4 $ 1,071 For the Nine Months Ended September 30, 2020 For the Nine Months Ended September 30, 2019 Number of Loans Balance Number of Loans Balance (Dollars in thousands) Real estate – residential — $ — — $ — Real estate – commercial Retail 2 1,613 3 449 Hotel & motel — — 3 1,439 Gas station & car wash 2 515 — — Mixed use 2 1,233 — — Industrial & warehouse 1 259 — — Other — — 3 1,055 Real estate – construction — — — — Commercial business 2 481 14 2,999 Residential mortgage — — — — Consumer and other 6 34 10 55 Total 15 $ 4,135 33 $ 5,997
Summary of Troubled Debt Restructurings with Subsequent Payment Default	he following tables present loans modified as TDRs within the previous twelve months ended September 30, 2020 and 2019 that subsequently had payment defaults during the three and nine months ended September 30, 2020 and 2019: Three Months Ended September 30, 2020 Three Months Ended September 30, 2019 Number of Loans Balance Number of Loans Balance (Dollars in thousands) Real estate – residential — $ — — $ — Real estate – commercial Retail 1 606 1 96 Hotel & motel — — — — Gas station & car wash — — — — Mixed Use — — — — Industrial & warehouse 1 2,326 — — Other 1 133 1 101 Real estate – construction — — — — Commercial business — — 2 31 Residential mortgage — — — — Consumer and other 4 20 8 37 Subtotal 7 $ 3,085 12 $ 265 Nine Months Ended September 30, 2020 Nine Months Ended September 30, 2019 Number of Loans Balance Number of Loans Balance (Dollars in thousands) Real estate – residential — $ — — $ — Real estate – commercial Retail 1 606 1 96 Hotel & motel — — — — Gas station & car wash 1 471 — — Mixed Use 1 466 — — Industrial & warehouse 2 2,586 — — Other 1 133 1 101 Real estate – construction — — — — Commercial business 1 14 3 31 Residential mortgage — — — — Consumer and other 5 24 11 42 Total 12 $ 4,300 16 $ 270

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Summary of Net Lease Cost and Other Information	The table below summarizes the Company’s net lease cost: Three Months Ended September 30, For the Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in thousands) Operating lease cost $ 3,928 $ 3,850 $ 11,752 $ 12,130 Short term lease cost — — — 9 Variable lease cost 864 875 2,403 2,411 Sublease income (169) (157) (595) (470) Net lease cost $ 4,623 $ 4,568 $ 13,560 $ 14,080 The table below summarizes other information related to the Company’s operating leases: At or for the Nine 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 $ 11,320 $ 11,021 Right-of-use assets obtained in exchange for lease liabilities, net — 65,263 Weighted-average remaining lease term - operating leases 5.3 years 6.0 years Weighted-average discount rate - operating leases 2.99 % 3.11 %
Summary of Maturity of Remaining Lease Liabilities	The table below summarizes the maturity of remaining lease liabilities: September 30, 2020 (Dollars in thousands) 2020 $ 3,806 2021 14,796 2022 10,615 2023 8,402 2024 6,769 2025 and thereafter 15,251 Total lease payments 59,639 Less: imputed interest 4,841 Total lease obligations $ 54,798

Financial Services, Banking and

Financial Services, Banking and Thrift (Tables)	9 Months Ended
	Sep. 30, 2020
Deposits [Abstract]
Schedule of Deposits	The following is breakdown of the Company’s deposits at September 30, 2020 and December 31, 2019: At September 30, 2020 At December 31, 2019 Balance Percentage (%) Balance Percentage (%) (Dollars in thousands) Noninterest bearing demand deposits $ 4,488,529 32 % $ 3,108,687 25 % Money market and NOW accounts 4,763,893 34 % 3,985,556 32 % Saving deposits 308,943 2 % 274,151 2 % Time deposits 4,446,991 32 % 5,158,970 41 % Total deposits $ 14,008,356 100 % $ 12,527,364 100 %

Borrowings (Tables)

Borrowings (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Contractual Maturities for FHLB-SF Borrowings	At September 30, 2020, the contractual maturities for outstanding FHLB advances were as follows: September 30, 2020 Scheduled maturities in: (Dollars in thousands) 2020 $ 100,000 2021 — 2022 100,000 Total $ 200,000

Subordinated Debentures and C_2

Subordinated Debentures and Convertible Notes (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020: Issuance Trust Issuance Trust Carrying Rate Current Rate Maturity (Dollars in thousands) Nara Capital Trust III 06/05/2003 $ 5,000 $ 5,155 Variable 3.40% 06/15/2033 Nara Statutory Trust IV 12/22/2003 5,000 5,155 Variable 3.13% 01/07/2034 Nara Statutory Trust V 12/17/2003 10,000 10,310 Variable 3.20% 12/17/2033 Nara Statutory Trust VI 03/22/2007 8,000 8,248 Variable 1.90% 06/15/2037 Center Capital Trust I 12/30/2003 18,000 14,400 Variable 3.13% 01/07/2034 Wilshire Trust II 03/17/2005 20,000 15,911 Variable 2.04% 03/17/2035 Wilshire Trust III 09/15/2005 15,000 11,277 Variable 1.65% 09/15/2035 Wilshire Trust IV 07/10/2007 25,000 18,259 Variable 1.63% 09/15/2037 Saehan Capital Trust I 03/30/2007 20,000 15,174 Variable 1.84% 06/30/2037 Total $ 126,000 $ 103,889
Convertible Debt	The value of the convertible note at issuance and the carrying value as of September 30, 2020 and December 31, 2019 are presented in the tables below: As of September 30, 2020 Amortization/ Gross Accumulated Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 217,500 $ — $ 217,500 Discount 5 years (21,880) 9,861 (12,019) Issuance costs to be capitalized 5 years (4,119) 1,908 (2,211) Carrying balance of convertible notes $ 191,501 $ 11,769 $ 203,270 As of December 31, 2019 Amortization/ Gross Accumulated Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 217,500 $ — $ 217,500 Discount 5 years (21,880) 6,659 (15,221) Issuance costs to be capitalized 5 years (4,119) 1,298 (2,821) Carrying balance of convertible notes $ 191,501 $ 7,957 $ 199,458

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Swaps Related to Hedging Program	At September 30, 2020 and December 31, 2019, interest rate swaps related to the Company’s loan hedging program that were outstanding are presented in the following table: September 30, 2020 December 31, 2019 (Dollars in thousands) Interest rate swaps on loans with correspondent banks Notional amount $ — $ 137,890 Weighted average remaining term (years) — 7.2 Pay fixed rate (weighted average) — % 3.62 % Received variable rate (weighted average) — % 3.83 % Estimated fair value $ — $ 739 Interest rate swaps on loans with correspondent banks Notional amount $ 496,879 $ 282,326 Weighted average remaining term (years) 6.8 6.9 Pay fixed rate (weighted average) 3.90 % 4.48 % Received variable rate (weighted average) 2.28 % 3.98 % Estimated fair value $ (40,617) $ (9,614) Back to back interest rate swaps with loan customers Notional amount $ — $ 137,890 Weighted average remaining term (years) — 7.2 Received fixed rate (weighted average) — % 3.62 % Pay variable rate (weighted average) — % 3.83 % Estimated fair value $ — $ (739) Back to back interest rate swaps with loan customers Notional amount $ 496,879 $ 282,326 Weighted average remaining term (years) 6.8 6.9 Received fixed rate (weighted average) 3.90 % 4.48 % Pay variable rate (weighted average) 2.28 % 3.98 % Estimated fair value $ 40,617 $ 9,614
Schedule of Derivative Instruments	September 30, 2020 December 31, 2019 (Dollars in thousands) Interest rate swaps designated as cash flow hedge (included in other liabilities) Notional amount $ 100,000 $ — Weighted average remaining term (years) 4.5 — Received variable rate (weighted average) 0.40 % — % Pay fixed rate (weighted average) 0.49 % — % Estimated fair value $ (796) $ — The following table reflects the notional amount and fair value of mortgage banking derivatives for the dates indicated: As of September 30, 2020 As of December 31, 2019 Notional Amount Fair Value Notional Amount Fair Value (Dollars in thousands) Assets: Interest rate lock commitments $ 31,689 $ 757 $ 10,540 $ 84 Forward sale contracts related to mortgage banking $ — $ — $ 4,532 $ 11 Liabilities: Interest rate lock commitments $ — $ — $ — $ — Forward sale contracts related to mortgage banking $ 31,689 $ (445) $ 6,008 $ (16)

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments	Commitments at September 30, 2020 and December 31, 2019 are summarized as follows: September 30, 2020 December 31, 2019 (Dollars in thousands) Commitments to extend credit $ 2,184,404 $ 1,864,947 Standby letters of credit 118,509 113,720 Other letters of credit 32,228 37,627 Commitments to fund investments in affordable housing partnerships 16,975 28,481

Goodwill, Intangible Assets, _2

Goodwill, Intangible Assets, and Servicing Assets (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 and December 31, 2019: As of September 30, 2020 As of December 31, 2019 Core Deposit Intangibles Related To: Amortization Period Gross Accumulated 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 (603) 1 (602) 2 Foster Bankshares acquisition 10 years 2,763 (2,272) 491 (2,120) 643 Wilshire Bancorp acquisition 10 years 18,138 (8,391) 9,747 (6,950) 11,188 Total $ 25,605 $ (15,366) $ 10,239 $ (13,772) $ 11,833
Schedule of Servicing Assets	The changes in servicing assets for the three and nine months ended September 30, 2020 and 2019 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in thousands) Balance at beginning of period $ 14,164 $ 19,997 $ 16,417 $ 23,132 Additions through originations of servicing assets 1,190 437 2,326 1,383 Amortization (1,636) (2,569) (5,025) (6,650) Balance at end of period $ 13,718 $ 17,865 $ 13,718 $ 17,865
Summary of Fair Value Inputs	The inputs used in evaluating servicing assets for impairment at September 30, 2020 and December 31, 2019 are presented below. September 30, 2020 December 31, 2019 SBA Servicing Assets: Weighted-average discount rate 10.21% 9.19% Constant prepayment rate 14.56% 14.17% Mortgage Servicing Assets: Weighted-average discount rate 8.38% 9.25% Constant prepayment rate 8.55% 9.57%

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Securities available for sale: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 793,596 $ — $ 793,596 $ — Mortgage-backed securities: Residential 676,739 — 676,739 — Commercial 500,724 — 500,724 — Corporate securities 3,888 — 3,888 — Municipal securities 86,044 — 84,996 1,048 Equity investments with readily determinable fair value 22,665 22,665 — — Interest rate swaps 40,617 — 40,617 — Mortgage banking derivatives 757 — 757 — Liabilities: Interest rate swaps 40,617 — 40,617 — Mortgage banking derivatives 445 — 445 — Other derivatives 995 — 796 199 Fair Value Measurements at the End of December 31, 2019 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Securities available for sale: U.S. Government agency and U.S. Government sponsored enterprises: Collateralized mortgage obligations $ 736,655 $ — $ 736,655 $ — Mortgage-backed securities: Residential 352,897 — 352,897 — Commercial 552,124 — 552,124 — Corporate securities 4,200 — 4,200 — Municipal securities 70,111 — 69,035 1,076 Equity investments with readily determinable fair value 22,123 22,123 — — Interest rate swaps 10,353 — 10,353 — Mortgage banking derivatives 95 — 95 — Liabilities: Interest rate swaps 10,353 — 10,353 — Mortgage banking derivatives 16 — 16 —
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, 2020 and 2019: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in thousands) Beginning Balance $ 1,066 $ 1,087 $ 1,076 $ 1,059 Change in fair value included in other comprehensive income (loss) (18) 21 (28) 49 Ending Balance $ 1,048 $ 1,108 $ 1,048 $ 1,108
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 September 30, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Collateral dependent loans at fair value: Real estate loans $ 33,012 $ — $ — $ 33,012 Commercial business 9,876 — — 9,876 Consumer 11 — — 11 OREO 17,549 — — 17,549 Fair Value Measurements at the End of December 31, 2019 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Collateral dependent loans at fair value: Real estate loans $ 9,519 $ — $ — $ 9,519 Commercial business 8,942 — — 8,942 OREO 19,086 — — 19,086 For assets measured at fair value on a non-recurring basis, the total net gains (losses), which include charge offs, recoveries, recorded ACL, 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, 2020 2019 2020 2019 (Dollars in thousands) Assets: Collateral dependent loans at fair value: Real estate loans $ (5,951) $ (891) $ (8,108) $ 682 Commercial business (2,902) 1,630 (5,470) (2,270) Consumer — (276) — (904) Loans held for sale, net — (599) — (599) OREO (1,682) 1,277 (4,118) 1,112
Carrying Amounts and Estimated Fair Values of Financial Instruments	Carrying amounts and estimated fair values of financial instruments, not previously presented, at September 30, 2020 and December 31, 2019 were as follows: September 30, 2020 Carrying Amount Estimated Fair Value Fair Value Measurement (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 629,133 $ 629,133 Level 1 Interest bearing deposits in other financial institutions 30,345 30,391 Level 2 Equity investments without readily determinable fair values 27,045 27,045 Level 2 Loans held for sale 9,170 9,420 Level 2 Loans receivable—net 12,940,376 12,958,185 Level 3 Accrued interest receivable 57,989 57,989 Level 2/3 Servicing assets, net 13,718 16,461 Level 3 Customers’ liabilities on acceptances 880 880 Level 2 Financial Liabilities: Noninterest bearing deposits $ 4,488,529 $ 4,488,529 Level 2 Saving and other interest bearing demand deposits 5,072,836 5,072,836 Level 2 Time deposits 4,446,991 4,460,696 Level 2 FHLB advances 200,000 204,938 Level 2 Convertible notes, net 203,270 181,613 Level 1 Subordinated debentures 103,889 93,804 Level 2 Accrued interest payable 21,991 21,991 Level 2 Acceptances outstanding 880 880 Level 2 December 31, 2019 Carrying Amount Estimated Fair Value Fair Value Measurement (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 698,567 $ 698,567 Level 1 Interest bearing deposits in other financial institutions 29,162 29,235 Level 2 Equity investments without readily determinable fair values 26,967 26,967 Level 2 Loans held for sale 54,271 56,011 Level 2 Loans receivable—net 12,181,863 12,143,727 Level 3 Accrued interest receivable 30,772 30,772 Level 2/3 Servicing assets, net 16,417 18,966 Level 3 Customers’ liabilities on acceptances 1,117 1,117 Level 2 Financial Liabilities: Noninterest bearing deposits $ 3,108,687 $ 3,108,687 Level 2 Saving and other interest bearing demand deposits 4,259,707 4,259,707 Level 2 Time deposits 5,158,970 5,182,405 Level 2 FHLB advances 625,000 628,903 Level 2 Convertible notes, net 199,458 206,210 Level 1 Subordinated debentures 103,035 114,690 Level 2 Accrued interest payable 33,810 33,810 Level 2 Acceptances outstanding 1,117 1,117 Level 2

Stockholders_ Equity (Tables)

Stockholders’ Equity (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 and 2019: Three Months Ended, Nine Months Ended, September 30, 2020 September 30, 2019 September 30, 2020 September 30, 2019 (Dollars in thousands) Balance at beginning of period $ 38,149 $ 7,423 $ 9,149 $ (32,705) Unrealized gain on securities available for sale (303) 14,160 41,820 71,349 Unrealized loss on interest rate swaps used for cash flow hedge 54 — (796) — Reclassification adjustments for net gains realize in net income (7,510) (153) (7,649) (282) Tax effect 2,292 (4,157) (9,842) (21,089) Total other comprehensive income (loss) $ (5,467) $ 9,850 $ 23,533 $ 49,978 Balance at end of period $ 32,682 $ 17,273 $ 32,682 $ 17,273

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement [Abstract]
Summary of Stock Option Activity Under the Plan	The following is a summary of the Company’s stock option activity for the nine months ended September 30, 2020: Number of Shares Weighted-Average Exercise Price Per Share Weighted-Average Aggregate Intrinsic Value (Dollars in thousands) Outstanding - January 1, 2020 935,211 $ 15.34 Granted — — Exercised — — Expired (21,495) 16.13 Forfeited (4,000) 17.18 Outstanding - September 30, 2020 909,716 $ 15.32 4.73 $ 267 Options exercisable - September 30, 2020 867,716 $ 15.23 4.67 $ 267
Summary of Restricted Stock and Performance Unit Activity Under the Plan	The following is a summary of the Company’s restricted stock and performance unit activity for the nine months ended September 30, 2020: Number of Shares Weighted-Average Grant Date Fair Value Outstanding (unvested) - January 1, 2020 1,035,744 $ 14.08 Granted 1,160,202 9.16 Vested (341,740) 14.97 Forfeited (121,391) 12.05 Outstanding (unvested) - September 30, 2020 1,732,815 $ 10.75

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2020
Banking Regulation [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 tables below for the dates indicated: Actual Required For Capital Adequacy Purposes Minimum Capital Adequacy Required To Be Well Capitalized As of September 30, 2020 Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) Common equity Tier 1 capital Company $ 1,554,838 11.36 % $ 616,132 4.50 % $ 958,428 7.00 % N/A N/A Bank $ 1,835,738 13.41 % $ 616,072 4.50 % $ 958,334 7.00 % $ 889,882 6.50 % Total capital Company $ 1,806,112 13.19 % $ 1,095,346 8.00 % $ 1,437,641 10.50 % N/A N/A Bank $ 1,987,025 14.51 % $ 1,095,239 8.00 % $ 1,437,501 10.50 % $ 1,369,049 10.00 % Tier 1 capital Company $ 1,654,826 12.09 % $ 821,509 6.00 % $ 1,163,805 8.50 % N/A N/A Bank $ 1,835,738 13.41 % $ 821,429 6.00 % $ 1,163,692 8.50 % $ 1,095,239 8.00 % Tier 1 capital Company $ 1,654,826 10.02 % $ 660,470 4.00 % N/A N/A N/A N/A Bank $ 1,835,738 11.12 % $ 660,464 4.00 % N/A N/A $ 825,580 5.00 % Actual Required For Capital Adequacy Purposes Minimum Capital Adequacy Required To Be Well Capitalized As of December 31, 2019 Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) Common equity Tier 1 capital Company $ 1,553,697 11.76 % $ 594,373 4.50 % $ 924,581 7.00 % N/A N/A Bank $ 1,811,862 13.72 % $ 594,320 4.50 % $ 924,498 7.00 % $ 858,462 6.50 % Total capital Company $ 1,747,611 13.23 % $ 1,056,664 8.00 % $ 1,386,871 10.50 % N/A N/A Bank $ 1,906,642 14.44 % $ 1,056,569 8.00 % $ 1,386,747 10.50 % $ 1,320,711 10.00 % Tier 1 capital Company $ 1,652,831 12.51 % $ 792,498 6.00 % $ 1,122,705 8.50 % N/A N/A Bank $ 1,811,862 13.72 % $ 792,427 6.00 % $ 1,122,605 8.50 % $ 1,056,569 8.00 % Tier 1 capital Company $ 1,652,831 11.22 % $ 589,367 4.00 % N/A N/A N/A N/A Bank $ 1,811,862 12.29 % $ 589,604 4.00 % N/A N/A $ 737,005 5.00 %

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 2019 2020 2019 (Dollars in thousands) Noninterest bearing deposit account income: Monthly service charges $ 303 $ 395 $ 1,001 $ 1,224 Customer analysis charges 1,693 2,194 5,074 5,788 NSF charges 608 1,887 2,824 5,754 Other service charges 110 195 484 605 Total noninterest bearing deposit account income 2,714 4,671 9,383 13,371 Interest bearing deposit account income: Monthly service charges 22 19 69 52 Total service fees on deposit accounts $ 2,736 $ 4,690 $ 9,452 $ 13,423 Wire transfer fee income: Wire transfer fees $ 812 $ 963 $ 2,383 $ 3,063 Foreign exchange fees 80 95 327 395 Total wire transfer fees $ 892 $ 1,058 $ 2,710 $ 3,458

Earnings Per Share (Details)

Earnings Per Share (Details)	Jun. 07, 2018	Mar. 31, 2020USD ($)shares	Sep. 30, 2020USD ($)$ / sharesshares	Sep. 30, 2019USD ($)$ / sharesshares	Sep. 30, 2020USD ($)$ / sharesshares	Sep. 30, 2019USD ($)$ / sharesshares	Dec. 31, 2018USD ($)	Jun. 30, 2020USD ($)shares	Sep. 30, 2020USD ($)shares	Jun. 30, 2019USD ($)	Jun. 06, 2018USD ($)
Antidilutive Securities Excluded from Computation of Earnings Per Share
Share repurchase program, authorized amount | $		$ 50,000,000					$ 150,000,000			$ 50,000,000
Common stock repurchased and recorded as treasury stock (in shares) | shares		2,716,034	0					12,661,581	12,661,581
Repurchase of treasury stock | $		$ 36,200,000			$ 36,180,000		$ 150,000,000	$ 200,000,000	$ 200,000,000
Net Income (Numerator)
Basic EPS - common stock | $			$ 30,490,000	$ 42,592,000	83,196,000	$ 128,031,000
Diluted EPS - common stock | $			$ 30,490,000	$ 42,592,000	$ 83,196,000	$ 128,031,000
Weighted-Average Shares (Denominator)
Basic EPS - common stock (in shares) | shares			123,251,336	126,685,921	123,581,055	126,661,798
Effect of dilutive securities:
Stock options, restricted stock, and ESPP shares (in shares) | shares			285,429	321,548	314,029	234,172
Diluted EPS - common stock (shares) | shares			123,536,765	127,007,469	123,895,084	126,895,970
Earnings Per Share
Basic EPS - common stock (in dollars per share) | $ / shares			$ 0.25	$ 0.34	$ 0.67	$ 1.01
Diluted EPS - common stock (in dollars per share) | $ / shares			$ 0.25	$ 0.34	$ 0.67	$ 1.01
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
Initial conversion rate	0.0450760				0.0450760
Stock options and restricted share awards
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive shares of common stock | shares			1,206,040	963,400	876,565	986,245

Equity Investments - Narrative

Equity Investments - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Net Investment Income [Line Items]
Equity investments with readily determinable fair value	$ 49,710,000		$ 49,710,000		$ 49,090,000
Equity investments without readily determinable fair values	27,000,000		27,000,000		27,000,000
Equity investments without readily determinable fair values, impairment	0	$ 0	0	$ 0
Equity investments without readily determinable fair values, observable price changes	0	$ 0	0	$ 0
Mutual funds
Net Investment Income [Line Items]
Equity investments with readily determinable fair value	22,700,000		22,700,000		22,100,000
Correspondent bank stock
Net Investment Income [Line Items]
Equity investments without readily determinable fair values	370,000		370,000		370,000
CDFI investments
Net Investment Income [Line Items]
Equity investments without readily determinable fair values	1,000,000		1,000,000		1,000,000
CRA investments
Net Investment Income [Line Items]
Equity investments without readily determinable fair values	$ 25,700,000		$ 25,700,000		$ 25,600,000

Equity Investments - Change in

Equity Investments - Change in Fair Value of Equity Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Net change in fair value recorded during the period on equity investments with readily determinable fair value	$ 0	$ 168	$ 542	$ 1,393
Net change in fair value recorded on equity investments sold during the period	0	0	0	0
Net change in fair value on equity investments with readily determinable fair values	$ 0	$ 168	$ 542	$ 1,393

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 2,014,555,000		$ 2,014,555,000		$ 1,703,841,000
Gross Unrealized Gains	48,229,000		48,229,000		19,914,000
Gross Unrealized Losses	(1,793,000)		(1,793,000)		(7,768,000)
Allowance For Investment Credit Losses	0		0
Fair Value	2,060,991,000		2,060,991,000		1,715,987,000
Net gains on sales of securities available for sale	7,500,000		7,500,000	$ 282,000
Proceeds from sale of securities available for sale	168,100,000	$ 46,500,000	168,069,000	115,628,000
Unrealized gains on securities available for sale net of taxes	32,682,000		32,682,000		9,149,000
Available-for-sale Securities
Debt Securities, Available-for-sale [Line Items]
Net gains on sales of securities available for sale		153,000
Unrealized gains on securities available for sale net of taxes	33,200,000		33,200,000		9,100,000
Collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	779,720,000		779,720,000		735,094,000
Gross Unrealized Gains	13,975,000		13,975,000		4,220,000
Gross Unrealized Losses	(99,000)		(99,000)		(2,659,000)
Allowance For Investment Credit Losses	0		0
Fair Value	793,596,000		793,596,000		736,655,000
Proceeds from sale of securities available for sale	20,200,000		20,200,000
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Allowance For Investment Credit Losses	0		0
Proceeds from sale of securities available for sale		44,200,000		73,900,000
Mortgage-backed securities: Residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	671,027,000		671,027,000		353,073,000
Gross Unrealized Gains	6,294,000		6,294,000		1,422,000
Gross Unrealized Losses	(582,000)		(582,000)		(1,598,000)
Allowance For Investment Credit Losses	0		0
Fair Value	676,739,000		676,739,000		352,897,000
Proceeds from sale of securities available for sale	113,200,000		113,200,000
Mortgage-backed securities: Commercial
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	474,963,000		474,963,000		541,043,000
Gross Unrealized Gains	25,761,000		25,761,000		13,441,000
Gross Unrealized Losses	0		0		(2,360,000)
Allowance For Investment Credit Losses	0		0
Fair Value	500,724,000		500,724,000		552,124,000
Proceeds from sale of securities available for sale	34,600,000		34,600,000
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	(1,112,000)		(1,112,000)		(800,000)
Allowance For Investment Credit Losses	0		0
Fair Value	3,888,000		3,888,000		4,200,000
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	83,845,000		83,845,000		69,631,000
Gross Unrealized Gains	2,199,000		2,199,000		831,000
Gross Unrealized Losses	0		0		(351,000)
Allowance For Investment Credit Losses	0		0
Fair Value	$ 86,044,000		$ 86,044,000		$ 70,111,000
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, 2020	Dec. 31, 2019
Amortized Cost
Due within one year	$ 350
Due after one year through five years	0
Due after five years through ten years	5,441
Due after ten years	83,054
Amortized Cost	2,014,555	$ 1,703,841
Estimated Fair Value
Due within one year	351
Due after one year through five years	0
Due after five years through ten years	5,477
Due after ten years	84,104
Estimated Fair Value	2,060,991	1,715,987
Carrying value of securities pledged to secure public deposits, pledged for various borrowings and for other purposes required or permitted by law	371,600	340,900
Collateralized mortgage obligations
Amortized Cost
Amortized Cost	779,720	735,094
Estimated Fair Value
No single maturity date, fair value	793,596
Estimated Fair Value	793,596	736,655
Mortgage-backed securities: Residential
Amortized Cost
Amortized Cost	671,027	353,073
Estimated Fair Value
No single maturity date, fair value	676,739
Estimated Fair Value	676,739	352,897
Mortgage-backed securities: Commercial
Amortized Cost
Amortized Cost	474,963	541,043
Estimated Fair Value
No single maturity date, fair value	500,724
Estimated Fair Value	$ 500,724	$ 552,124

Securities Available for Sale_3

Securities Available for Sale - Aggregate Unrealized Losses and Fair Value (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2020USD ($)security	Sep. 30, 2020USD ($)security	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)security
Number  of Securities
Less than 12 months | security	15	15		35
12 months or longer | security	1	1		57
Total | security	16	16		92
Fair  Value
Less than 12 months	$ 209,486,000	$ 209,486,000		$ 269,737,000
12 months or longer	3,888,000	3,888,000		405,841,000
Total	213,374,000	213,374,000		675,578,000
Gross Unrealized Losses
Less than 12 months	(681,000)	(681,000)		(2,064,000)
12 months or longer	(1,112,000)	(1,112,000)		(5,704,000)
Total	(1,793,000)	(1,793,000)		(7,768,000)
Accrued interest receivable for investment securities available for sale	4,400,000	4,400,000		$ 4,300,000
Allowance for credit losses for available for sale securities	0	0
Net gains on sales of securities available for sale	$ 7,500,000	$ 7,500,000	$ 282,000
Collateralized mortgage obligations
Number  of Securities
Less than 12 months | security	8	8		20
12 months or longer | security	0	0		32
Total | security	8	8		52
Fair  Value
Less than 12 months	$ 94,580,000	$ 94,580,000		$ 108,236,000
12 months or longer	0	0		183,050,000
Total	94,580,000	94,580,000		291,286,000
Gross Unrealized Losses
Less than 12 months	(99,000)	(99,000)		(721,000)
12 months or longer	0	0		(1,938,000)
Total	(99,000)	(99,000)		$ (2,659,000)
Allowance for credit losses for available for sale securities	$ 0	$ 0
Mortgage-backed securities
Number  of Securities
Total | security	7	7
Gross Unrealized Losses
Allowance for credit losses for available for sale securities	$ 0	$ 0
Mortgage-backed securities: Residential
Number  of Securities
Less than 12 months | security	7	7		6
12 months or longer | security	0	0		16
Total | security	7	7		22
Fair  Value
Less than 12 months	$ 114,906,000	$ 114,906,000		$ 84,107,000
12 months or longer	0	0		129,457,000
Total	114,906,000	114,906,000		213,564,000
Gross Unrealized Losses
Less than 12 months	(582,000)	(582,000)		(267,000)
12 months or longer	0	0		(1,331,000)
Total	(582,000)	(582,000)		$ (1,598,000)
Allowance for credit losses for available for sale securities	$ 0	$ 0
Mortgage-backed securities: Commercial
Number  of Securities
Less than 12 months | security	0	0		7
12 months or longer | security	0	0		5
Total | security	0	0		12
Fair  Value
Less than 12 months	$ 0	$ 0		$ 68,452,000
12 months or longer	0	0		73,697,000
Total	0	0		142,149,000
Gross Unrealized Losses
Less than 12 months	0	0		(1,037,000)
12 months or longer	0	0		(1,323,000)
Total	0	0		$ (2,360,000)
Allowance for credit losses for available for sale securities	$ 0	$ 0
Corporate securities
Number  of Securities
Less than 12 months | security	0	0		0
12 months or longer | security				1
Total | security	1	1		1
Fair  Value
Less than 12 months	$ 0	$ 0		$ 0
12 months or longer	3,888,000	3,888,000		4,200,000
Total	3,888,000	3,888,000		4,200,000
Gross Unrealized Losses
Less than 12 months	0	0		0
12 months or longer	(1,112,000)	(1,112,000)		(800,000)
Total	(1,112,000)	(1,112,000)		$ (800,000)
Allowance for credit losses for available for sale securities	$ 0	$ 0
Municipal securities
Number  of Securities
Less than 12 months | security	0	0		2
12 months or longer | security	0	0		3
Total | security	0	0		5
Fair  Value
Less than 12 months	$ 0	$ 0		$ 8,942,000
12 months or longer	0	0		15,437,000
Total	0	0		24,379,000
Gross Unrealized Losses
Less than 12 months	0	0		(39,000)
12 months or longer	0	0		(312,000)
Total	0	0		$ (351,000)
Allowance for credit losses for available for sale securities	$ 0	$ 0
U.S. Government Agency and U.S. Government Sponsored Enterprises
Gross Unrealized Losses
Percentage of portfolio	96.00%	96.00%

Loans Receivable and Allowanc_3

Loans Receivable and Allowance for Credit Losses - Schedule of Loans Receivable By Major Category (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020USD ($)segment	Jun. 30, 2020USD ($)	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 13,120,225		$ 12,276,007
Allowance for credit losses	(179,849)	$ (161,771)	(94,144)	$ (93,882)	$ (94,066)	$ (92,557)
Loans receivable, net of allowance for credit losses	12,940,376		12,181,863
Net deferred fees/costs	$ 5,400		2,700
Number of portfolio segments | segment	4
Real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 8,713,536		8,664,551
Allowance for credit losses	(129,624)	(119,030)	(53,593)	(53,046)	(54,084)	(56,767)
Real estate loans | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	54,585		52,558
Allowance for credit losses	(208)		(204)
Real estate loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	8,347,358		8,316,470
Allowance for credit losses	(127,483)		(51,712)
Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	311,593		295,523
Allowance for credit losses	(1,933)		(1,677)
Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	3,700,020		2,721,183
Allowance for credit losses	(44,209)	(35,493)	(33,032)	(34,054)	(32,364)	(28,484)
Commercial business | SBA, Paycheck Protection Program Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	464,600
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	659,876		835,188
Allowance for credit losses	(4,699)	(5,868)	(5,925)	(5,307)	(5,514)	(5,207)
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	46,793		55,085
Allowance for credit losses	$ (1,317)	$ (1,380)	$ (1,594)	$ (1,475)	$ (2,104)	$ (2,099)

Loans Receivable and Allowanc_4

Loans Receivable and Allowance for Credit Losses - Allowance for Credit Losses on Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Dec. 31, 2019
Allowance for Loan Losses and the Loans Receivables by Impairment Methodology
Accrued interest receivable on loans							$ 53,500	$ 26,200
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	$ 161,771	$ 94,066	$ 94,144	$ 92,557	$ 92,557
Accounting Standards Update [Extensible List]			us-gaap:AccountingStandardsUpdate201613Member		us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201602Member
Provision (credit) for credit/loan losses	22,000	2,100	$ 67,500	6,300
Loans charged off	(6,350)	(2,602)	(13,211)	(6,432)
Recoveries of charge offs	2,428	780	5,216	2,797
PCI allowance adjustment		(462)		(1,340)
Balance, end of period	179,849	93,882	179,849	93,882	$ 94,144	$ 92,557
Allowance for credit losses:
Individually evaluated							6,895	3,402
Collectively evaluated							172,954	82,663
Total	179,849	93,882	179,849	92,557	92,557	92,557	179,849	94,144
Loans outstanding:
Individually evaluated							105,532	90,652
Collectively evaluated							13,014,693	12,079,786
Total							13,120,225	12,276,007
Reserve for unfunded loan commitments recorded in other liabilities							1,300	636
Additions to reserves for unfunded loan commitments recorded in credit related expenses	0	(100)	660	(100)
PCI loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			8,079
Balance, end of period					8,079
Allowance for credit losses:
Total			8,079		8,079			8,079
Loans outstanding:
Total								105,569
Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			26,200
Balance, end of period					26,200
Allowance for credit losses:
Total			26,200		26,200			26,200
Real estate
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	119,030	54,084	53,593	56,767	56,767
Provision (credit) for credit/loan losses	15,748	(87)	55,773	(4,225)
Loans charged off	(5,313)	(1,197)	(7,884)	(1,439)
Recoveries of charge offs	159	246	351	1,943
PCI allowance adjustment		0		0
Balance, end of period	129,624	53,046	129,624	53,046	53,593	56,767
Allowance for credit losses:
Individually evaluated							2,339	312
Collectively evaluated							127,285	48,616
Total	129,624	53,046	129,624	53,046	56,767	56,767	129,624	53,593
Loans outstanding:
Individually evaluated							76,025	64,684
Collectively evaluated							8,637,511	8,502,103
Total							8,713,536	8,664,551
Real estate | PCI loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			4,665
Balance, end of period					4,665
Allowance for credit losses:
Total			4,665		4,665			4,665
Loans outstanding:
Total								97,764
Real estate | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			27,791
Balance, end of period					27,791
Allowance for credit losses:
Total			27,791		27,791			27,791
Commercial business
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	35,493	32,364	33,032	28,484	28,484
Provision (credit) for credit/loan losses	7,265	2,286	11,663	9,693
Loans charged off	(800)	(1,124)	(4,294)	(4,083)
Recoveries of charge offs	2,251	528	4,830	838
PCI allowance adjustment		0		(878)
Balance, end of period	44,209	34,054	44,209	34,054	33,032	28,484
Allowance for credit losses:
Individually evaluated							4,485	3,073
Collectively evaluated							39,724	26,914
Total	44,209	34,054	33,032	34,054	33,032	28,484	44,209	33,032
Loans outstanding:
Individually evaluated							24,930	22,905
Collectively evaluated							3,675,090	2,691,378
Total							3,700,020	2,721,183
Commercial business | PCI loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			3,045
Balance, end of period					3,045
Allowance for credit losses:
Total			3,045		3,045			3,045
Loans outstanding:
Total								6,900
Commercial business | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			(1,022)
Balance, end of period					(1,022)
Allowance for credit losses:
Total			(1,022)		(1,022)			(1,022)
Residential mortgage
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	5,868	5,514	5,925	5,207	5,207
Provision (credit) for credit/loan losses	(1,169)	(207)	(683)	176
Loans charged off	0	0	0	(76)
Recoveries of charge offs	0	0	0	0
PCI allowance adjustment		0		0
Balance, end of period	4,699	5,307	4,699	5,307	5,925	5,207
Allowance for credit losses:
Individually evaluated							21	10
Collectively evaluated							4,678	5,913
Total	4,699	5,307	5,925	5,307	5,925	5,207	4,699	5,925
Loans outstanding:
Individually evaluated							3,775	2,762
Collectively evaluated							656,101	832,268
Total							659,876	835,188
Residential mortgage | PCI loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			2
Balance, end of period					2
Allowance for credit losses:
Total			2		2			2
Loans outstanding:
Total								158
Residential mortgage | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			(543)
Balance, end of period					(543)
Allowance for credit losses:
Total			(543)		(543)			(543)
Consumer and other
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	1,380	2,104	1,594	2,099	2,099
Provision (credit) for credit/loan losses	156	108	747	656
Loans charged off	(237)	(281)	(1,033)	(834)
Recoveries of charge offs	18	6	35	16
PCI allowance adjustment		(462)		(462)
Balance, end of period	1,317	1,475	1,317	1,475	1,594	2,099
Allowance for credit losses:
Individually evaluated							50	7
Collectively evaluated							1,267	1,220
Total	$ 1,317	$ 1,475	1,594	$ 1,475	1,594	$ 2,099	1,317	1,594
Loans outstanding:
Individually evaluated							802	301
Collectively evaluated							45,991	54,037
Total							$ 46,793	55,085
Consumer and other | PCI loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			367
Balance, end of period					367
Allowance for credit losses:
Total			367		367			367
Loans outstanding:
Total								747
Consumer and other | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			(26)
Balance, end of period					(26)
Allowance for credit losses:
Total			$ (26)		$ (26)			$ (26)

Loans Receivable and Allowanc_5

Loans Receivable and Allowance for Credit Losses - Nonaccrual Loans and Loans Past Due 90 or More Days and Still on Accrual Status (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Nonaccrual [Line Items]
Threshold period for loans to be placed on nonaccrual status	90 days
Nonaccrual with No ACL	$ 46,663
Nonaccrual with an ACL	22,542
Total Nonaccrual	69,205	$ 54,785
Accruing Loans Past Due 90 or More Days	1,537	7,547
Guaranteed portion of SBA loans excluded from Nonaccrual loans	26,200	28,100
PCI loans
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual		18,300
Real estate | Residential
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	0
Nonaccrual with an ACL	0
Total Nonaccrual	0	0
Accruing Loans Past Due 90 or More Days	0	0
Real estate | Commercial | Retail
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	8,023
Nonaccrual with an ACL	3,688
Total Nonaccrual	11,711	2,934
Accruing Loans Past Due 90 or More Days	0	449
Real estate | Commercial | Hotel & motel
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	14,280
Nonaccrual with an ACL	2,260
Total Nonaccrual	16,540	10,901
Accruing Loans Past Due 90 or More Days	0	0
Real estate | Commercial | Gas station & car wash
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	351
Nonaccrual with an ACL	928
Total Nonaccrual	1,279	271
Accruing Loans Past Due 90 or More Days	0	0
Real estate | Commercial | Mixed use
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	1,531
Nonaccrual with an ACL	815
Total Nonaccrual	2,346	665
Accruing Loans Past Due 90 or More Days	293	634
Real estate | Commercial | Industrial & warehouse
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	4,618
Nonaccrual with an ACL	1,950
Total Nonaccrual	6,568	10,544
Accruing Loans Past Due 90 or More Days	0	0
Real estate | Commercial | Other
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	4,576
Nonaccrual with an ACL	2,121
Total Nonaccrual	6,697	5,455
Accruing Loans Past Due 90 or More Days	0	919
Real estate | Construction
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	6,598
Nonaccrual with an ACL	0
Total Nonaccrual	6,598	10,165
Accruing Loans Past Due 90 or More Days	0	3,850
Commercial business
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	4,351
Nonaccrual with an ACL	8,671
Total Nonaccrual	13,022	10,893
Accruing Loans Past Due 90 or More Days	0	1,096
Residential mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	2,335
Nonaccrual with an ACL	1,440
Total Nonaccrual	3,775	2,753
Accruing Loans Past Due 90 or More Days	0	0
Consumer and other
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	0
Nonaccrual with an ACL	669
Total Nonaccrual	669	204
Accruing Loans Past Due 90 or More Days	$ 1,244	$ 599

Loans Receivable and Allowanc_6

Loans Receivable and Allowance for Credit Losses - Collateral-Dependent Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 13,120,225		$ 13,120,225		$ 12,276,007
Interest income reversals due to loans being placed on nonaccrual status	76	$ 85	611	$ 1,100
Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	76,964		76,964
Real Estate Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	71,549		71,549
Other Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	5,415		5,415
Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	8,713,536		8,713,536		8,664,551
Real estate | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	54,585		54,585		52,558
Real estate | Residential | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0		0
Real estate | Residential | Real Estate Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0		0
Real estate | Residential | Other Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0		0
Real estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	8,347,358		8,347,358		8,316,470
Real estate | Commercial | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	55,024		55,024
Real estate | Commercial | Real Estate Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	55,024		55,024
Real estate | Commercial | Other Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0		0
Real estate | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	311,593		311,593		295,523
Real estate | Construction | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	6,598		6,598
Real estate | Construction | Real Estate Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	6,598		6,598
Real estate | Construction | Other Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0		0
Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,700,020		3,700,020		2,721,183
Commercial business | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	12,996		12,996
Commercial business | Real Estate Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	7,581		7,581
Commercial business | Other Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	5,415		5,415
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	659,876		659,876		835,188
Residential mortgage | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,335		2,335
Residential mortgage | Real Estate Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,335		2,335
Residential mortgage | Other Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0		0
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	46,793		46,793		$ 55,085
Consumer and other | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	11		11
Consumer and other | Real Estate Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	11		11
Consumer and other | Other Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 0		$ 0

Loans Receivable and Allowanc_7

Loans Receivable and Allowance for Credit Losses - Past Due Financing Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 117,300	$ 62,148
PCI loans
Financing Receivable, Past Due [Line Items]
Total Past Due		15,000
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	6,284	15,177
60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	62,285	6,494
90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	48,731	40,477
Real estate | Residential
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Real estate | Residential | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Real estate | Residential | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Real estate | Residential | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Real estate | Commercial | Retail
Financing Receivable, Past Due [Line Items]
Total Past Due	55,178	5,544
Real estate | Commercial | Retail | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	328	1,083
Real estate | Commercial | Retail | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	44,776	1,424
Real estate | Commercial | Retail | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	10,074	3,037
Real estate | Commercial | Hotel & motel
Financing Receivable, Past Due [Line Items]
Total Past Due	16,294	8,691
Real estate | Commercial | Hotel & motel | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	534	1,346
Real estate | Commercial | Hotel & motel | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	2,081	936
Real estate | Commercial | Hotel & motel | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	13,679	6,409
Real estate | Commercial | Gas station & car wash
Financing Receivable, Past Due [Line Items]
Total Past Due	1,224	3,231
Real estate | Commercial | Gas station & car wash | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	461	997
Real estate | Commercial | Gas station & car wash | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	2,038
Real estate | Commercial | Gas station & car wash | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	763	196
Real estate | Commercial | Mixed use
Financing Receivable, Past Due [Line Items]
Total Past Due	1,899	1,394
Real estate | Commercial | Mixed use | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	551	593
Real estate | Commercial | Mixed use | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Real estate | Commercial | Mixed use | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	1,348	801
Real estate | Commercial | Industrial & warehouse
Financing Receivable, Past Due [Line Items]
Total Past Due	5,297	4,085
Real estate | Commercial | Industrial & warehouse | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	467	94
Real estate | Commercial | Industrial & warehouse | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	1,095	45
Real estate | Commercial | Industrial & warehouse | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	3,735	3,946
Real estate | Commercial | Other
Financing Receivable, Past Due [Line Items]
Total Past Due	5,845	5,300
Real estate | Commercial | Other | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	2,054	811
Real estate | Commercial | Other | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	2,671	785
Real estate | Commercial | Other | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	1,120	3,704
Real estate | Construction
Financing Receivable, Past Due [Line Items]
Total Past Due	14,720	14,015
Real estate | Construction | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Real estate | Construction | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	8,122	0
Real estate | Construction | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	6,598	14,015
Commercial business
Financing Receivable, Past Due [Line Items]
Total Past Due	7,953	6,470
Commercial business | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	638	401
Commercial business | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	575	352
Commercial business | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	6,740	5,717
Residential mortgage
Financing Receivable, Past Due [Line Items]
Total Past Due	6,462	12,506
Residential mortgage | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	1,185	9,676
Residential mortgage | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	2,456	792
Residential mortgage | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	2,821	2,038
Consumer and other
Financing Receivable, Past Due [Line Items]
Total Past Due	2,428	912
Consumer and other | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	66	176
Consumer and other | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	509	122
Consumer and other | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 1,853	$ 614

Loans Receivable and Allowanc_8

Loans Receivable and Allowance for Credit Losses - Financing Receivable Credit Quality Indicators (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	$ 2,145,847,000
Term loan originated in 2019	2,426,663,000
Term loan originated in 2018	2,304,563,000
Term loan originated in 2017	1,784,815,000
Term loan originated in 2016	1,102,008,000
Term loan originated prior to 2016	1,768,772,000
Revolving Loans	1,587,557,000
Total loans	13,120,225,000	$ 12,276,007,000
Revolving loans converted to term loans	0
Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	2,138,372,000
Term loan originated in 2019	2,384,454,000
Term loan originated in 2018	2,226,767,000
Term loan originated in 2017	1,706,088,000
Term loan originated in 2016	1,037,777,000
Term loan originated prior to 2016	1,584,383,000
Revolving Loans	1,570,454,000
Total loans	12,648,295,000	11,874,949,000
Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	5,990,000
Term loan originated in 2019	29,146,000
Term loan originated in 2018	44,034,000
Term loan originated in 2017	32,403,000
Term loan originated in 2016	13,958,000
Term loan originated prior to 2016	18,213,000
Revolving Loans	9,644,000
Total loans	153,388,000	141,490,000
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	1,485,000
Term loan originated in 2019	13,063,000
Term loan originated in 2018	33,762,000
Term loan originated in 2017	39,726,000
Term loan originated in 2016	50,231,000
Term loan originated prior to 2016	166,176,000
Revolving Loans	7,459,000
Total loans	311,902,000	259,555,000
Doubtful/Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	0
Term loan originated in 2017	6,598,000
Term loan originated in 2016	42,000
Term loan originated prior to 2016	0
Revolving Loans	0
Total loans	6,640,000	13,000
Real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	8,713,536,000	8,664,551,000
Real estate | Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	5,818,000
Term loan originated in 2019	16,509,000
Term loan originated in 2018	11,739,000
Term loan originated in 2017	4,352,000
Term loan originated in 2016	7,592,000
Term loan originated prior to 2016	5,146,000
Revolving Loans	3,429,000
Total loans	54,585,000	52,558,000
Real estate | Residential | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	5,818,000
Term loan originated in 2019	16,509,000
Term loan originated in 2018	11,599,000
Term loan originated in 2017	4,352,000
Term loan originated in 2016	7,592,000
Term loan originated prior to 2016	5,061,000
Revolving Loans	3,429,000
Total loans	54,360,000	52,096,000
Real estate | Residential | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	0
Term loan originated in 2017	0
Term loan originated in 2016	0
Term loan originated prior to 2016	0
Revolving Loans	0
Total loans	0	0
Real estate | Residential | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	140,000
Term loan originated in 2017	0
Term loan originated in 2016	0
Term loan originated prior to 2016	85,000
Revolving Loans	0
Total loans	225,000	462,000
Real estate | Residential | Doubtful/Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	0
Term loan originated in 2017	0
Term loan originated in 2016	0
Term loan originated prior to 2016	0
Revolving Loans	0
Total loans	0	0
Real estate | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	1,112,640,000
Term loan originated in 2019	1,601,153,000
Term loan originated in 2018	1,644,359,000
Term loan originated in 2017	1,339,328,000
Term loan originated in 2016	911,930,000
Term loan originated prior to 2016	1,630,234,000
Revolving Loans	107,714,000
Total loans	8,347,358,000	8,316,470,000
Real estate | Commercial | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	1,112,640,000
Term loan originated in 2019	1,587,016,000
Term loan originated in 2018	1,605,796,000
Term loan originated in 2017	1,297,459,000
Term loan originated in 2016	868,639,000
Term loan originated prior to 2016	1,468,638,000
Revolving Loans	104,518,000
Total loans	8,044,706,000	8,039,751,000
Real estate | Commercial | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	2,047,000
Term loan originated in 2018	12,923,000
Term loan originated in 2017	17,203,000
Term loan originated in 2016	1,681,000
Term loan originated prior to 2016	10,082,000
Revolving Loans	0
Total loans	43,936,000	78,519,000
Real estate | Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	12,090,000
Term loan originated in 2018	25,640,000
Term loan originated in 2017	24,666,000
Term loan originated in 2016	41,610,000
Term loan originated prior to 2016	151,514,000
Revolving Loans	3,196,000
Total loans	258,716,000	198,200,000
Real estate | Commercial | Doubtful/Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	0
Term loan originated in 2017	0
Term loan originated in 2016	0
Term loan originated prior to 2016	0
Revolving Loans	0
Total loans	0	0
Real estate | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	29,382,000
Term loan originated in 2019	38,336,000
Term loan originated in 2018	109,419,000
Term loan originated in 2017	99,797,000
Term loan originated in 2016	11,382,000
Term loan originated prior to 2016	23,277,000
Revolving Loans	0
Total loans	311,593,000	295,523,000
Real estate | Construction | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	29,382,000
Term loan originated in 2019	38,336,000
Term loan originated in 2018	109,419,000
Term loan originated in 2017	82,598,000
Term loan originated in 2016	5,608,000
Term loan originated prior to 2016	10,031,000
Revolving Loans	0
Total loans	275,374,000	253,173,000
Real estate | Construction | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	0
Term loan originated in 2017	0
Term loan originated in 2016	5,774,000
Term loan originated prior to 2016	5,124,000
Revolving Loans	0
Total loans	10,898,000	24,620,000
Real estate | Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	0
Term loan originated in 2017	10,601,000
Term loan originated in 2016	0
Term loan originated prior to 2016	8,122,000
Revolving Loans	0
Total loans	18,723,000	17,730,000
Real estate | Construction | Doubtful/Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	0
Term loan originated in 2017	6,598,000
Term loan originated in 2016	0
Term loan originated prior to 2016	0
Revolving Loans	0
Total loans	6,598,000	0
Commercial business
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	987,379,000
Term loan originated in 2019	655,978,000
Term loan originated in 2018	283,653,000
Term loan originated in 2017	154,197,000
Term loan originated in 2016	104,022,000
Term loan originated prior to 2016	63,103,000
Revolving Loans	1,451,688,000
Total loans	3,700,020,000	2,721,183,000
Commercial business | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	979,904,000
Term loan originated in 2019	628,028,000
Term loan originated in 2018	246,008,000
Term loan originated in 2017	134,655,000
Term loan originated in 2016	90,613,000
Term loan originated prior to 2016	55,025,000
Revolving Loans	1,437,781,000
Total loans	3,572,014,000	2,643,814,000
Commercial business | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	5,990,000
Term loan originated in 2019	27,099,000
Term loan originated in 2018	31,111,000
Term loan originated in 2017	15,083,000
Term loan originated in 2016	6,503,000
Term loan originated prior to 2016	3,007,000
Revolving Loans	9,644,000
Total loans	98,437,000	38,185,000
Commercial business | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	1,485,000
Term loan originated in 2019	851,000
Term loan originated in 2018	6,534,000
Term loan originated in 2017	4,459,000
Term loan originated in 2016	6,864,000
Term loan originated prior to 2016	5,071,000
Revolving Loans	4,263,000
Total loans	29,527,000	39,171,000
Commercial business | Doubtful/Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	0
Term loan originated in 2017	0
Term loan originated in 2016	42,000
Term loan originated prior to 2016	0
Revolving Loans	0
Total loans	42,000	13,000
Residential mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	4,881,000
Term loan originated in 2019	112,085,000
Term loan originated in 2018	253,342,000
Term loan originated in 2017	184,337,000
Term loan originated in 2016	61,839,000
Term loan originated prior to 2016	43,392,000
Revolving Loans	0
Total loans	659,876,000	835,188,000
Residential mortgage | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	4,881,000
Term loan originated in 2019	111,963,000
Term loan originated in 2018	251,894,000
Term loan originated in 2017	184,337,000
Term loan originated in 2016	60,122,000
Term loan originated prior to 2016	42,747,000
Revolving Loans	0
Total loans	655,944,000	832,149,000
Residential mortgage | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	0
Term loan originated in 2017	0
Term loan originated in 2016	0
Term loan originated prior to 2016	0
Revolving Loans	0
Total loans	0	0
Residential mortgage | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	122,000
Term loan originated in 2018	1,448,000
Term loan originated in 2017	0
Term loan originated in 2016	1,717,000
Term loan originated prior to 2016	645,000
Revolving Loans	0
Total loans	3,932,000	3,039,000
Residential mortgage | Doubtful/Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	0
Term loan originated in 2017	0
Term loan originated in 2016	0
Term loan originated prior to 2016	0
Revolving Loans	0
Total loans	0	0
Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	5,747,000
Term loan originated in 2019	2,602,000
Term loan originated in 2018	2,051,000
Term loan originated in 2017	2,804,000
Term loan originated in 2016	5,243,000
Term loan originated prior to 2016	3,620,000
Revolving Loans	24,726,000
Total loans	46,793,000	55,085,000
Consumer and other | Pass/Not Rated
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	5,747,000
Term loan originated in 2019	2,602,000
Term loan originated in 2018	2,051,000
Term loan originated in 2017	2,687,000
Term loan originated in 2016	5,203,000
Term loan originated prior to 2016	2,881,000
Revolving Loans	24,726,000
Total loans	45,897,000	53,966,000
Consumer and other | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	0
Term loan originated in 2017	117,000
Term loan originated in 2016	0
Term loan originated prior to 2016	0
Revolving Loans	0
Total loans	117,000	166,000
Consumer and other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	0
Term loan originated in 2017	0
Term loan originated in 2016	40,000
Term loan originated prior to 2016	739,000
Revolving Loans	0
Total loans	779,000	953,000
Consumer and other | Doubtful/Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in 2020	0
Term loan originated in 2019	0
Term loan originated in 2018	0
Term loan originated in 2017	0
Term loan originated in 2016	0
Term loan originated prior to 2016	0
Revolving Loans	0
Total loans	$ 0	$ 0

Loans Receivable and Allowanc_9

Loans Receivable and Allowance for Credit Losses - Loans Held For Investment - Reclassification to Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfer of loans held for investment to held for sale	$ 0	$ 25,988	$ 1,002	$ 108,979
Total loans	13,120,225		13,120,225		$ 12,276,007
Pass/Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	12,648,295		12,648,295		11,874,949
Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	153,388		153,388		141,490
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	311,902		311,902		259,555
Doubtful/Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	6,640		6,640		13
Real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	8,713,536		8,713,536		8,664,551
Real estate loans | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	54,585		54,585		52,558
Real estate loans | Residential | Pass/Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	54,360		54,360		52,096
Real estate loans | Residential | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		0
Real estate loans | Residential | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	225		225		462
Real estate loans | Residential | Doubtful/Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		0
Real estate loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfer of loans held for investment to held for sale	0	25,988	0	25,988
Total loans	8,347,358		8,347,358		8,316,470
Real estate loans | Commercial | Pass/Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	8,044,706		8,044,706		8,039,751
Real estate loans | Commercial | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	43,936		43,936		78,519
Real estate loans | Commercial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	258,716		258,716		198,200
Real estate loans | Commercial | Doubtful/Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		0
Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	311,593		311,593		295,523
Real estate loans | Construction | Pass/Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	275,374		275,374		253,173
Real estate loans | Construction | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	10,898		10,898		24,620
Real estate loans | Construction | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	18,723		18,723		17,730
Real estate loans | Construction | Doubtful/Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	6,598		6,598		0
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfer of loans held for investment to held for sale	0	$ 0	1,002	$ 82,991
Total loans	659,876		659,876		835,188
Residential mortgage | Pass/Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	655,944		655,944		832,149
Residential mortgage | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		0
Residential mortgage | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,932		3,932		3,039
Residential mortgage | Doubtful/Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0		0		0
Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,700,020		3,700,020		2,721,183
Commercial business | Pass/Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,572,014		3,572,014		2,643,814
Commercial business | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	98,437		98,437		38,185
Commercial business | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	29,527		29,527		39,171
Commercial business | Doubtful/Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	42		42		13
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	46,793		46,793		55,085
Consumer | Pass/Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	45,897		45,897		53,966
Consumer | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	117		117		166
Consumer | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	779		779		953
Consumer | Doubtful/Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 0		$ 0		$ 0

Loans Receivable and Allowan_10

Loans Receivable and Allowance for Credit Losses - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020USD ($)loan	Sep. 30, 2019USD ($)loan	Sep. 30, 2020USD ($)loan	Sep. 30, 2019USD ($)loan	Dec. 31, 2019USD ($)loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Reasonable and supportable period at which point loss assumptions revert back to historical loss information			2 years
Reversion period			1 year
Non-modeled loans as percentage of total loan portfolio (less than)	3.00%		3.00%
Positive or negative qualitative adjustment of the Loss Migration Ratio	0.25%		0.25%
Financing receivable, balance threshold to determine individual evaluation for impairment	$ 500,000		$ 500,000
Total TDR loans	$ 49,497,000		$ 49,497,000		$ 46,726,000
Number of loans | loan	4	4	15,000	33
Allowance for TDRs	$ 4,900,000		$ 4,900,000		3,100,000
ACL for TDRs modified during period	342,000	$ 17,000	661,000	$ 47,000
Total charge-offs of TDR loans modified	0	0	0	33,000
ACL for the TDRs that had payment defaults	4,000	5,000	67,000	5,000
Total charge offs for TDR loans that had payment defaults	0	$ 33,000	0	$ 33,000
Accrued interest receivable on loans	53,500,000		53,500,000		26,200,000
COVID-19 Pandemic
Financing Receivable, Allowance for Credit Loss [Line Items]
Amount of loans modified			$ 1,150,000,000
Real estate | COVID-19 Pandemic
Financing Receivable, Allowance for Credit Loss [Line Items]
Percent of loans modified (more than)			90.00%
Real estate | TDR Loans on Accrual Status
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDR loans	23,640,000		$ 23,640,000		23,664,000
Real estate | Commercial | TDR Loans on Accrual Status
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDR loans	$ 23,600,000		$ 23,600,000		$ 23,700,000
Number of loans | loan			30		15
Commercial business
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of loans | loan	0	2	2,000	14
Commercial business | TDR Loans on Accrual Status
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDR loans	$ 11,655,000		$ 11,655,000		$ 11,845,000
Number of loans | loan			29		27
Consumer and other
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of loans | loan	2	0	6,000	10
Consumer and other | TDR Loans on Accrual Status
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDR loans	$ 134,000		$ 134,000		$ 200,000
Number of loans | loan			16		12
Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Temporary modifications, period of interest only payments			3 months
Minimum | COVID-19 Pandemic
Financing Receivable, Allowance for Credit Loss [Line Items]
Period of full payment deferrals related to most loan modifications			3 months
Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Temporary modifications, period of interest only payments			6 months
Maximum | COVID-19 Pandemic
Financing Receivable, Allowance for Credit Loss [Line Items]
Period of full payment deferrals related to most loan modifications			9 months

Loans Receivable and Allowan_11

Loans Receivable and Allowance for Credit Losses - Allowance for Loans, by Portfolio Segment and Evaluation Method (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 105,532		$ 90,652
Impaired loans (recorded investment)			90,652
ACL on individually evaluated loans	$ 6,895		3,402
Specific allowance			$ 3,402
Individually evaluated loans ACL coverage	6.53%
Specific allowance to impaired loans			3.75%
Collectively evaluated loans	$ 13,014,693		$ 12,079,786
Other loans			12,185,355
ACL on collectively evaluated loans	$ 172,954		82,663
General allowance			$ 90,742
Collectively evaluated loans ACL coverage	1.33%
General allowance to other loans			0.74%
Total loans	$ 13,120,225		$ 12,276,007
Total loans	13,120,225		12,276,007
Allowance for credit losses	$ 179,849	$ 161,771	$ 94,144	$ 93,882	$ 94,066	$ 92,557
Total ACL to total loans	1.37%		0.77%
Real estate
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 76,025		$ 64,684
ACL on individually evaluated loans	2,339		312
Collectively evaluated loans	8,637,511		8,502,103
ACL on collectively evaluated loans	127,285		48,616
Total loans	8,713,536		8,664,551
Total loans	8,713,536		8,664,551
Allowance for credit losses	129,624	119,030	53,593	53,046	54,084	56,767
Real estate | Residential
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	0
Impaired loans (recorded investment)			0
ACL on individually evaluated loans	0
Specific allowance			0
Collectively evaluated loans	54,585
Other loans			52,558
ACL on collectively evaluated loans	$ 208
General allowance			$ 204
Collectively evaluated loans ACL coverage	0.38%
General allowance to other loans			0.39%
Total loans	$ 54,585		$ 52,558
Total loans	54,585		52,558
Allowance for credit losses	$ 208		$ 204
Total ACL to total loans	0.38%		0.39%
Real estate | Commercial
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 69,427
Impaired loans (recorded investment)			$ 54,519
ACL on individually evaluated loans	$ 2,339
Specific allowance			$ 312
Individually evaluated loans ACL coverage	3.37%
Specific allowance to impaired loans			0.57%
Collectively evaluated loans	$ 8,277,931
Other loans			$ 8,261,951
ACL on collectively evaluated loans	$ 125,144
General allowance			$ 51,400
Collectively evaluated loans ACL coverage	1.51%
General allowance to other loans			0.62%
Total loans	$ 8,347,358		$ 8,316,470
Total loans	8,347,358		8,316,470
Allowance for credit losses	$ 127,483		$ 51,712
Total ACL to total loans	1.53%		0.62%
Real estate | Construction
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 6,598
Impaired loans (recorded investment)			$ 10,165
ACL on individually evaluated loans	0
Specific allowance			$ 0
Specific allowance to impaired loans			0.00%
Collectively evaluated loans	304,995
Other loans			$ 285,358
ACL on collectively evaluated loans	$ 1,933
General allowance			$ 1,677
Collectively evaluated loans ACL coverage	0.63%
General allowance to other loans			0.59%
Total loans	$ 311,593		$ 295,523
Total loans	311,593		295,523
Allowance for credit losses	$ 1,933		$ 1,677
Total ACL to total loans	0.62%		0.57%
Commercial business
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 24,930		$ 22,905
Impaired loans (recorded investment)			22,905
ACL on individually evaluated loans	$ 4,485		3,073
Specific allowance			$ 3,073
Individually evaluated loans ACL coverage	17.99%
Specific allowance to impaired loans			13.42%
Collectively evaluated loans	$ 3,675,090		$ 2,691,378
Other loans			2,698,278
ACL on collectively evaluated loans	$ 39,724		26,914
General allowance			$ 29,959
Collectively evaluated loans ACL coverage	1.08%
General allowance to other loans			1.11%
Total loans	$ 3,700,020		$ 2,721,183
Total loans	3,700,020		2,721,183
Allowance for credit losses	$ 44,209	35,493	$ 33,032	34,054	32,364	28,484
Total ACL to total loans	1.19%		1.21%
Residential mortgage
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 3,775		$ 2,762
Impaired loans (recorded investment)			2,762
ACL on individually evaluated loans	$ 21		10
Specific allowance			$ 10
Individually evaluated loans ACL coverage	0.56%
Specific allowance to impaired loans			0.36%
Collectively evaluated loans	$ 656,101		$ 832,268
Other loans			832,426
ACL on collectively evaluated loans	$ 4,678		5,913
General allowance			$ 5,915
Collectively evaluated loans ACL coverage	0.71%
General allowance to other loans			0.71%
Total loans	$ 659,876		$ 835,188
Total loans	659,876		835,188
Allowance for credit losses	$ 4,699	5,868	$ 5,925	5,307	5,514	5,207
Total ACL to total loans	0.71%		0.71%
Consumer and other
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 802		$ 301
Impaired loans (recorded investment)			301
ACL on individually evaluated loans	$ 50		7
Specific allowance			$ 7
Individually evaluated loans ACL coverage	6.23%
Specific allowance to impaired loans			2.33%
Collectively evaluated loans	$ 45,991		$ 54,037
Other loans			54,784
ACL on collectively evaluated loans	$ 1,267		1,220
General allowance			$ 1,587
Collectively evaluated loans ACL coverage	2.75%
General allowance to other loans			2.90%
Total loans	$ 46,793		$ 55,085
Total loans	46,793		55,085
Allowance for credit losses	$ 1,317	$ 1,380	$ 1,594	$ 1,475	$ 2,104	$ 2,099
Total ACL to total loans	2.81%		2.89%

Loans Receivable and Allowan_12

Loans Receivable and Allowance for Credit Losses - Troubled Debt Restructurings on Financing Receivables (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020USD ($)loan	Sep. 30, 2019USD ($)loan	Sep. 30, 2020USD ($)loan	Sep. 30, 2019USD ($)loan	Dec. 31, 2019USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	$ 49,497		$ 49,497		$ 46,726
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan	4	4	15,000	33
Balance	$ 1,785	$ 1,071	$ 4,135	$ 5,997
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	7	12	12	16
Balance	$ 3,085	$ 265	$ 4,300	$ 270
ACL for TDRs modified during period	342	17	661	47
Total charge-offs of TDR loans modified	0	0	0	33
ACL for the TDRs that had payment defaults	4	5	67	5
Total charge offs for TDR loans that had payment defaults	0	$ 33	0	$ 33
Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	14,565		14,565		10,213
Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	27,237		27,237		31,411
Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	$ 7,695		$ 7,695		5,102
Real estate | Residential
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan	0	0	0	0
Balance	$ 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 | Commercial | Retail
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan	1	1	2,000	3
Balance	$ 1,007	$ 328	$ 1,613	$ 449
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	1	1	1	1
Balance	$ 606	$ 96	$ 606	$ 96
Real estate | Commercial | Hotel & motel
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan	0	1	0	3
Balance	$ 0	$ 574	$ 0	$ 1,439
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 | Commercial | Gas station & car wash
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan	0	0	2,000	0
Balance	$ 0	$ 0	$ 515	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	1	0
Balance	$ 0	$ 0	$ 471	$ 0
Real estate | Commercial | Mixed use
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan	1	0	2,000	0
Balance	$ 767	$ 0	$ 1,233	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	0	1	0
Balance	$ 0	$ 0	$ 466	$ 0
Real estate | Commercial | Industrial & warehouse
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan	0	0	1,000	0
Balance	$ 0	$ 0	$ 259	$ 0
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	1	0	2	0
Balance	$ 2,326	$ 0	$ 2,586	$ 0
Real estate | Commercial | Other
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan	0	0	0	3
Balance	$ 0	$ 0	$ 0	$ 1,055
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	1	1	1	1
Balance	$ 133	$ 101	$ 133	$ 101
Real estate | Construction
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan	0	0	0	0
Balance	$ 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 | TDR Loans on Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	23,640		23,640		23,664
Real estate | TDR Loans on Accrual Status | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	23,600		$ 23,600		$ 23,700
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan			30		15
Real estate | TDR Loans on Accrual Status | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	5,944		$ 5,944		$ 4,708
Real estate | TDR Loans on Accrual Status | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	11,874		11,874		14,537
Real estate | TDR Loans on Accrual Status | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	5,822		5,822		4,419
Real estate | TDR Loans on Nonaccrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	7,940		7,940		4,640
Real estate | TDR Loans on Nonaccrual Status | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	7,323		7,323		4,306
Real estate | TDR Loans on Nonaccrual Status | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	178		178		0
Real estate | TDR Loans on Nonaccrual Status | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	$ 439		$ 439		334
Commercial business
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan	0	2	2,000	14
Balance	$ 0	$ 169	$ 481	$ 2,999
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	0	2	1	3
Balance	$ 0	$ 31	$ 14	$ 31
Commercial business | TDR Loans on Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	11,655		$ 11,655		$ 11,845
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan			29		27
Commercial business | TDR Loans on Accrual Status | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	925		$ 925		$ 886
Commercial business | TDR Loans on Accrual Status | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	10,730		10,730		10,778
Commercial business | TDR Loans on Accrual Status | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0		0		181
Commercial business | TDR Loans on Nonaccrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	6,010		6,010		6,255
Commercial business | TDR Loans on Nonaccrual Status | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	332		332		259
Commercial business | TDR Loans on Nonaccrual Status | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	4,244		4,244		5,931
Commercial business | TDR Loans on Nonaccrual Status | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	$ 1,434		$ 1,434		65
Residential mortgage
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan	0	0	0	0
Balance	$ 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
Residential mortgage | TDR Loans on Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0		0		0
Residential mortgage | TDR Loans on Accrual Status | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0		0		0
Residential mortgage | TDR Loans on Accrual Status | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0		0		0
Residential mortgage | TDR Loans on Accrual Status | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0		0		0
Residential mortgage | TDR Loans on Nonaccrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0		0		0
Residential mortgage | TDR Loans on Nonaccrual Status | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0		0		0
Residential mortgage | TDR Loans on Nonaccrual Status | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0		0		0
Residential mortgage | TDR Loans on Nonaccrual Status | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	$ 0		$ 0		0
Consumer and other
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan	2	0	6,000	10
Balance	$ 11	$ 0	$ 34	$ 55
Troubled Debt Restructuring, By Loan Class, Modified And Subsequent Payment Default
Number of Loans | loan	4	8	5	11
Balance	$ 20	$ 37	$ 24	$ 42
Consumer and other | TDR Loans on Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	134		$ 134		$ 200
Troubled Debt Restructuring, By Loan Class
Number of Loans | loan			16		12
Consumer and other | TDR Loans on Accrual Status | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	41		$ 41		$ 54
Consumer and other | TDR Loans on Accrual Status | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	93		93		43
Consumer and other | TDR Loans on Accrual Status | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0		0		103
Consumer and other | TDR Loans on Nonaccrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	118		118		122
Consumer and other | TDR Loans on Nonaccrual Status | Payment concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0		0		0
Consumer and other | TDR Loans on Nonaccrual Status | Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	118		118		122
Consumer and other | TDR Loans on Nonaccrual Status | Rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	$ 0		$ 0		$ 0

Leases - Additional Information

Leases - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)lease	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018	Jan. 01, 2019USD ($)
Lessee, Lease, Description [Line Items]
Accounting Standards Update [Extensible List]			us-gaap:AccountingStandardsUpdate201613Member		us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201602Member
Operating lease right-of-use assets	$ 52,308		$ 52,308		$ 58,593		$ 64,200
Extension options, term of extension			5 years
Operating lease liabilities	54,798		$ 54,798		$ 60,506
Short-term operating lease liability	13,700		13,700
Long-term operating lease liability	41,100		$ 41,100
Number of leases extended | lease			6
Number of new leases | lease			0
Rent expense	$ 4,600	$ 4,600	$ 13,700	$ 14,200
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term for operating leases	1 year		1 year
Extension options, term of extension			22 months
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term for operating leases	10 years		10 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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 3,928	$ 3,850	$ 11,752	$ 12,130
Short term lease cost	0	0	0	9
Variable lease cost	864	875	2,403	2,411
Sublease income	(169)	(157)	(595)	(470)
Net lease cost	$ 4,623	$ 4,568	$ 13,560	$ 14,080

Leases - Other Information (Det

Leases - Other Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows for operating leases	$ 11,320	$ 11,021
Right-of-use assets obtained in exchange for lease liabilities, net	$ 0	$ 65,263
Weighted-average remaining lease term - operating leases	5 years 3 months 18 days	6 years
Weighted-average discount rate - operating leases	2.99%	3.11%

Leases - Maturities of Remainin

Leases - Maturities of Remaining Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Leases [Abstract]
2020	$ 3,806
2021	14,796
2022	10,615
2023	8,402
2024	6,769
2025 and thereafter	15,251
Total lease payments	59,639
Less: imputed interest	4,841
Total lease obligations	$ 54,798	$ 60,506

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Deposits Disclosure [Line Items]
Time Deposits, $250,000 or More	$ 1,980,000	$ 1,860,000
Securities pledged as collateral	371,600	340,900
Brokered deposits	1,000,000	1,480,000
Noninterest bearing	4,488,529	3,108,687
Money market and NOW accounts	4,763,893	3,985,556
Savings deposits	308,943	274,151
Time deposits	4,446,991	5,158,970
Total deposits	$ 14,008,356	$ 12,527,364
Percent of total deposit balance, by type	100.00%	100.00%
Money market and NOW accounts
Deposits Disclosure [Line Items]
Brokered deposits	$ 501,000	$ 538,200
Percent of total deposit balance, by type	34.00%	32.00%
Time deposit accounts
Deposits Disclosure [Line Items]
Brokered deposits	$ 500,600	$ 940,500
Noninterest Bearing Demand Deposits
Deposits Disclosure [Line Items]
Percent of total deposit balance, by type	32.00%	25.00%
Savings Deposits
Deposits Disclosure [Line Items]
Percent of total deposit balance, by type	2.00%	2.00%
Bank Time Deposits
Deposits Disclosure [Line Items]
Percent of total deposit balance, by type	32.00%	41.00%
California State Treasurer
Deposits Disclosure [Line Items]
Time Deposits, $250,000 or More		$ 300,000
Required eligible collateral pledge on outstanding deposits, minimum percentage	110.00%
Securities pledged as collateral	$ 360,900	$ 333,200

Borrowings - Narrative (Details

Borrowings - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)security	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)security	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Percent of assets	25.00%		25.00%
Maximum borrowing capacity	$ 4,290,000,000		$ 4,290,000,000		$ 3,850,000,000
Percent outstanding advances	100.00%		100.00%
Pledged as collateral	$ 0		$ 0		0
FHLB advances	200,000,000		200,000,000		625,000,000
Proceeds from FHLB advances			1,010,000,000	$ 565,000,000
FHLB prepayment penalty	3,584,000	$ 0	3,584,000	$ 0
FHLB prepayment	300,000,000
Remaining borrowing capacity	4,050,000,000		4,050,000,000
Federal funds purchased	$ 0		$ 0		0
Percent of qualifying assets (up to)	99.00%		99.00%
Securities pledged as collateral	$ 371,600,000		$ 371,600,000		$ 340,900,000
Weighted Average
Debt Instrument [Line Items]
FHLB advances, interest rate	1.32%		1.32%		1.84%
Minimum
Debt Instrument [Line Items]
FHLB advances, interest rate	0.25%		0.25%
Maximum
Debt Instrument [Line Items]
FHLB advances, interest rate	2.39%		2.39%
Qualifying Loans
Debt Instrument [Line Items]
Asset balance used to determine maximum borrowing capacity from federal reserve bank	$ 812,500,000		$ 812,500,000
FRB Discount Window
Debt Instrument [Line Items]
Number of securities pledged as collateral | security	1		1
Securities pledged as collateral	$ 5,900,000		$ 5,900,000
Total available borrowing capacity	631,500,000		631,500,000		$ 740,600,000
Amount outstanding	0		0		0
Unsecured Credit Facility with FHLB
Debt Instrument [Line Items]
Unsecured credit facility, maximum borrowing capacity	81,200,000		81,200,000		95,000,000
Mortgage Loans on Real Estate
Debt Instrument [Line Items]
Pledged as collateral, FHLB	$ 7,020,000,000		$ 7,020,000,000		$ 6,760,000,000

Borrowings - Maturities of FHLB

Borrowings - Maturities of FHLB Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
2020	$ 100,000
2021	0
2022	100,000
FHLB advances	$ 200,000	$ 625,000

Subordinated Debentures and C_3

Subordinated Debentures and Convertible Notes - Narrative (Details)	Jun. 07, 2018$ / shares	Sep. 30, 2020USD ($)grantor_trust	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)grantor_trust	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)	Jun. 06, 2018USD ($)
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
Carrying value of Debentures		103,889,000		$ 103,889,000		$ 103,035,000
Other assets
Subordinated Borrowing [Line Items]
Investment in common trust securities		3,900,000		3,900,000		3,900,000
Carrying Value of Debentures
Subordinated Borrowing [Line Items]
Carrying value of Debentures		103,889,000		103,889,000		103,000,000
Remaining discounts on acquired Debentures		26,000,000		26,000,000		$ 26,900,000
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
Interest rate							2.00%
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%
Number of outstanding years for which non-cash interest expense and issuance cost capitalization expense will be recorded	5 years			5 years		5 years
Interest expense on convertible notes		$ 2,400,000	$ 2,300,000	$ 7,100,000	$ 6,900,000
Convertible Notes | Discount Rate
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, 2020	Dec. 31, 2019
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 126,000,000
Carrying Value of Debentures	103,889,000	$ 103,035,000
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	$ 103,889,000	$ 103,000,000
Nara Capital Trust III
Subordinated Borrowing [Line Items]
Current Rate	3.40%
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	3.13%
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	3.20%
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	1.90%
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	3.13%
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	$ 14,400,000
Wilshire Trust II
Subordinated Borrowing [Line Items]
Current Rate	2.04%
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	$ 15,911,000
Wilshire Trust III
Subordinated Borrowing [Line Items]
Current Rate	1.65%
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	$ 11,277,000
Wilshire Trust IV
Subordinated Borrowing [Line Items]
Current Rate	1.63%
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	$ 18,259,000
Saehan Capital Trust I
Subordinated Borrowing [Line Items]
Current Rate	1.84%
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	$ 15,174,000

Subordinated Debentures and C_5

Subordinated Debentures and Convertible Notes - Schedule of Convertible Debt (Details) - Convertible Notes - USD ($) $ in Thousands	Jun. 07, 2018	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Amortization/ Capitalization Period	5 years	5 years	5 years
Gross Carrying Amount
Convertible notes principal balance		$ 217,500	$ 217,500
Discount		(21,880)	(21,880)
Issuance costs to be capitalized		(4,119)	(4,119)
Carrying balance of convertible notes		191,501	191,501
Accumulated Amortization / Capitalization
Discount		9,861	6,659
Issuance costs to be capitalized		1,908	1,298
Carrying balance of convertible notes		11,769	7,957
Carrying Amount
Convertible notes principal balance		217,500	217,500
Discount		(12,019)	(15,221)
Issuance costs to be capitalized		(2,211)	(2,821)
Carrying balance of convertible notes		$ 203,270	$ 199,458

Derivative Financial Instrume_3

Derivative Financial Instruments (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020USD ($)derivative	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)derivative	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest Expense	$ 27,583,000	$ 56,159,000	$ 110,407,000	$ 165,926,000
Interest rate swaps | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent | Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest Expense	(21,000)	$ 0	118,000	$ 0
Interest rate lock commitments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	31,700,000		31,700,000		$ 10,500,000
Not Designated as Hedging Instrument | Risk participation agreement
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 62,800,000		$ 62,800,000
Number of derivative instruments held | derivative	1		1
Credit valuation adjustment	$ 199,000		$ 199,000
Designated as Hedging Instrument | Interest rate swaps | Cash Flow Hedge
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 100,000,000		$ 100,000,000		$ 0
Weighted average remaining term (years)			4 years 6 months		0 years
Pay/Received fixed rate (weighted average)	0.49%		0.49%		0.00%
Received/Pay variable rate (weighted average)	0.40%		0.40%		0.00%
Estimated fair value	$ (796,000)		$ (796,000)		$ 0
Number of derivative instruments held | derivative	1		1
Other assets | Not Designated as Hedging Instrument | Correspondent Banks | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 0		$ 0		$ 137,890,000
Weighted average remaining term (years)			0 years		7 years 2 months 12 days
Pay/Received fixed rate (weighted average)	0.00%		0.00%		3.62%
Received/Pay variable rate (weighted average)	0.00%		0.00%		3.83%
Estimated fair value	$ 0		$ 0		$ 739,000
Other assets | Not Designated as Hedging Instrument | Customers | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 496,879,000		$ 496,879,000		$ 282,326,000
Weighted average remaining term (years)			6 years 9 months 18 days		6 years 10 months 24 days
Pay/Received fixed rate (weighted average)	3.90%		3.90%		4.48%
Received/Pay variable rate (weighted average)	2.28%		2.28%		3.98%
Estimated fair value	$ 40,617,000		$ 40,617,000		$ 9,614,000
Other liabilities | Not Designated as Hedging Instrument | Correspondent Banks | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 496,879,000		$ 496,879,000		$ 282,326,000
Weighted average remaining term (years)			6 years 9 months 18 days		6 years 10 months 24 days
Pay/Received fixed rate (weighted average)	3.90%		3.90%		4.48%
Received/Pay variable rate (weighted average)	2.28%		2.28%		3.98%
Estimated fair value	$ (40,617,000)		$ (40,617,000)		$ (9,614,000)
Other liabilities | Not Designated as Hedging Instrument | Customers | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 0		$ 0		$ 137,890,000
Weighted average remaining term (years)			0 years		7 years 2 months 12 days
Pay/Received fixed rate (weighted average)	0.00%		0.00%		3.62%
Received/Pay variable rate (weighted average)	0.00%		0.00%		3.83%
Estimated fair value	$ 0		$ 0		$ (739,000)

Derivative Financial Instrume_4

Derivative Financial Instruments - Summary of Derivative Notional Amounts and Fair Values (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Interest rate lock commitments
Derivative [Line Items]
Notional amount, derivative asset	$ 31,689,000	$ 10,540,000
Fair value, derivative asset	757,000	84,000
Notional amount, derivative liability	0	0
Fair value, derivative liability	0	0
Notional amount	31,700,000	10,500,000
Forward sale contracts related to mortgage banking | Short
Derivative [Line Items]
Notional amount, derivative asset	0	4,532,000
Fair value, derivative asset	0	11,000
Notional amount, derivative liability	31,689,000	6,008,000
Fair value, derivative liability	(445,000)	$ (16,000)
Risk participation agreement | Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	$ 62,800,000

Commitments and Contingencies_2

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Supply Commitment [Line Items]
Loss contingencies for all legal claims	$ 1,400	$ 440
Loss contingencies for all legal claims	1,400	440
Commitments to extend credit
Supply Commitment [Line Items]
Commitments and letters of credit	2,184,404	1,864,947
Standby letters of credit
Supply Commitment [Line Items]
Commitments and letters of credit	118,509	113,720
Other letters of credit
Supply Commitment [Line Items]
Commitments and letters of credit	32,228	37,627
Commitments to fund investments in affordable housing partnerships
Supply Commitment [Line Items]
Commitments and letters of credit	$ 16,975	$ 28,481

Goodwill, Intangible Assets, _3

Goodwill, Intangible Assets, and Servicing Assets - Intangible Assets (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment	$ 0		$ 0
Goodwill	464,450,000		464,450,000		$ 464,450,000
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization expense related to core deposit intangible assets	531,000	$ 557,000	1,600,000	$ 1,700,000
Gross Amount	25,605,000		25,605,000
Accumulated Amortization	(15,366,000)		(15,366,000)		(13,772,000)
Carrying Amount	10,239,000		$ 10,239,000		11,833,000
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	(603,000)		(603,000)		(602,000)
Carrying Amount	1,000		$ 1,000		2,000
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	(2,272,000)		(2,272,000)		(2,120,000)
Carrying Amount	491,000		$ 491,000		643,000
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	(8,391,000)		(8,391,000)		(6,950,000)
Carrying Amount	$ 9,747,000		$ 9,747,000		$ 11,188,000
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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of period	$ 14,164	$ 19,997	$ 16,417	$ 23,132	$ 23,132
Additions through originations of servicing assets	1,190	437	2,326	1,383
Amortization	(1,636)	(2,569)	(5,025)	(6,650)
Balance at end of period	13,718	$ 17,865	13,718	$ 17,865	16,417
Principal balances of loans serviced for other institutions	$ 1,280,000		$ 1,280,000		$ 1,350,000
SBA Servicing Assets: Weighted-average discount rate			10.21%		9.19%
SBA Servicing Assets: Constant prepayment rate			14.56%		14.17%
Mortgage Servicing Assets: Weighted-average discount rate			8.38%		9.25%
Mortgage Servicing Assets: Constant prepayment rate			8.55%		9.57%

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax provision	$ 9,254,000	$ 14,566,000	$ 25,487,000	$ 43,261,000
Pretax income	$ 39,744,000	$ 57,158,000	$ 108,683,000	$ 171,292,000
Effective income tax rate	23.28%	25.48%	23.45%	25.26%
Unrecognized tax benefits	$ 68,000		$ 68,000		$ 141,000
Interest accrued	17,000		17,000		34,000
Penalties accrued	0		0		$ 0
Decrease in unrecognized tax benefits is reasonably possible	$ 68,000		$ 68,000

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value, Recurring (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020USD ($)	Dec. 31, 2019USD ($)
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	$ 2,060,991	$ 1,715,987
Equity investments with readily determinable fair value	49,710	49,090
Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	793,596	736,655
Mortgage-backed securities: Residential
Assets:
Securities available for sale, at fair value	676,739	352,897
Mortgage-backed securities: Commercial
Assets:
Securities available for sale, at fair value	500,724	552,124
Corporate securities
Assets:
Securities available for sale, at fair value	3,888	4,200
Municipal securities
Assets:
Securities available for sale, at fair value	86,044	70,111
Recurring basis
Assets:
Equity investments with readily determinable fair value	22,665	22,123
Recurring basis | Interest rate swaps
Assets:
Derivative assets	40,617	10,353
Liabilities:
Derivative liabilities	40,617	10,353
Recurring basis | Mortgage banking derivatives
Assets:
Derivative assets	757	95
Liabilities:
Derivative liabilities	445	16
Recurring basis | Other derivatives
Liabilities:
Derivative liabilities	995
Recurring basis | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	793,596	736,655
Recurring basis | Mortgage-backed securities: Residential
Assets:
Securities available for sale, at fair value	676,739	352,897
Recurring basis | Mortgage-backed securities: Commercial
Assets:
Securities available for sale, at fair value	500,724	552,124
Recurring basis | Corporate securities
Assets:
Securities available for sale, at fair value	3,888	4,200
Recurring basis | Municipal securities
Assets:
Securities available for sale, at fair value	86,044	70,111
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Equity investments with readily determinable fair value	22,665	22,123
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate swaps
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage banking derivatives
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other derivatives
Liabilities:
Derivative liabilities	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) | Mortgage-backed securities: Residential
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities: 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 | Significant Other Observable Inputs (Level 2)
Assets:
Equity investments with readily determinable fair value	0	0
Recurring basis | Significant Other Observable Inputs (Level 2) | Interest rate swaps
Assets:
Derivative assets	40,617	10,353
Liabilities:
Derivative liabilities	40,617	10,353
Recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage banking derivatives
Assets:
Derivative assets	757	95
Liabilities:
Derivative liabilities	445	16
Recurring basis | Significant Other Observable Inputs (Level 2) | Other derivatives
Liabilities:
Derivative liabilities	796
Recurring basis | Significant Other Observable Inputs (Level 2) | Collateralized mortgage obligations
Assets:
Securities available for sale, at fair value	793,596	736,655
Recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities: Residential
Assets:
Securities available for sale, at fair value	676,739	352,897
Recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities: Commercial
Assets:
Securities available for sale, at fair value	500,724	552,124
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate securities
Assets:
Securities available for sale, at fair value	3,888	4,200
Recurring basis | Significant Other Observable Inputs (Level 2) | Municipal securities
Assets:
Securities available for sale, at fair value	84,996	69,035
Recurring basis | Significant Unobservable Inputs (Level 3)
Assets:
Equity investments with readily determinable fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Interest rate swaps
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Mortgage banking derivatives
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Other derivatives
Liabilities:
Derivative liabilities	199
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) | Mortgage-backed securities: Residential
Assets:
Securities available for sale, at fair value	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities: 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	$ 1,048	$ 1,076
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 | Inventory | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.50
Discount Rate | Inventory | 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) - Level 3 - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 1,066	$ 1,087	$ 1,076	$ 1,059
Change in fair value included in other comprehensive income (loss)	(18)	21	(28)	49
Ending Balance	$ 1,048	$ 1,108	$ 1,048	$ 1,108

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets Measured at Fair Value, Non-Recurring (Details) - Non-recurring basis - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Collateral dependent loans at fair value | Real estate loans
Assets:
Assets	$ 33,012	$ 9,519
Collateral dependent loans at fair value | Commercial business
Assets:
Assets	9,876	8,942
Collateral dependent loans at fair value | Consumer
Assets:
Assets	11
OREO
Assets:
Assets	17,549	19,086
Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateral dependent loans at fair value | Real estate loans
Assets:
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateral dependent loans at fair value | Commercial business
Assets:
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateral dependent loans at fair value | Consumer
Assets:
Assets	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | OREO
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | Collateral dependent loans at fair value | Real estate loans
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | Collateral dependent loans at fair value | Commercial business
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | Collateral dependent loans at fair value | Consumer
Assets:
Assets	0
Significant Other Observable Inputs (Level 2) | OREO
Assets:
Assets	0	0
Significant Unobservable Inputs (Level 3) | Collateral dependent loans at fair value | Real estate loans
Assets:
Assets	33,012	9,519
Significant Unobservable Inputs (Level 3) | Collateral dependent loans at fair value | Commercial business
Assets:
Assets	9,876	8,942
Significant Unobservable Inputs (Level 3) | Collateral dependent loans at fair value | Consumer
Assets:
Assets	11
Significant Unobservable Inputs (Level 3) | OREO
Assets:
Assets	$ 17,549	$ 19,086

Fair Value Measurements - Total

Fair Value Measurements - Total Net Gains Losses on Assets Measured at Fair Value on a Non-Recurring Basis (Details) - Change during period - Non-recurring basis - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Collateral dependent loans at fair value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	$ 0	$ (599)	$ 0	$ (599)
Collateral dependent loans at fair value | Real estate loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	(5,951)	(891)	(8,108)	682
Collateral dependent loans at fair value | Commercial business
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	(2,902)	1,630	(5,470)	(2,270)
Collateral dependent loans at fair value | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	0	(276)	0	(904)
OREO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	$ (1,682)	$ 1,277	$ (4,118)	$ 1,112

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financial Assets:
Equity investments without readily determinable fair values	$ 27,000	$ 27,000
Level 1 | Carrying Amount
Financial Assets:
Cash and cash equivalents	629,133	698,567
Financial Liabilities:
Convertible notes, net	203,270	199,458
Level 1 | Estimated Fair Value
Financial Assets:
Cash and cash equivalents	629,133	698,567
Financial Liabilities:
Convertible notes, net	181,613	206,210
Level 2/3 | Carrying Amount
Financial Assets:
Accrued interest receivable	57,989	30,772
Level 2/3 | Estimated Fair Value
Financial Assets:
Accrued interest receivable	57,989	30,772
Level 2 | Carrying Amount
Financial Assets:
Interest bearing deposits in other financial institutions	30,345	29,162
Equity investments without readily determinable fair values	27,045	26,967
Loans held for sale	9,170	54,271
Customers’ liabilities on acceptances	880	1,117
Financial Liabilities:
Noninterest bearing deposits	4,488,529	3,108,687
Saving and other interest bearing demand deposits	5,072,836	4,259,707
Time deposits	4,446,991	5,158,970
FHLB advances	200,000	625,000
Subordinated debentures	103,889	103,035
Accrued interest payable	21,991	33,810
Acceptances outstanding	880	1,117
Level 2 | Estimated Fair Value
Financial Assets:
Interest bearing deposits in other financial institutions	30,391	29,235
Equity investments without readily determinable fair values	27,045	26,967
Loans held for sale	9,420	56,011
Customers’ liabilities on acceptances	880	1,117
Financial Liabilities:
Noninterest bearing deposits	4,488,529	3,108,687
Saving and other interest bearing demand deposits	5,072,836	4,259,707
Time deposits	4,460,696	5,182,405
FHLB advances	204,938	628,903
Subordinated debentures	93,804	114,690
Accrued interest payable	21,991	33,810
Acceptances outstanding	880	1,117
Level 3 | Carrying Amount
Financial Assets:
Loans receivable—net	12,940,376	12,181,863
Servicing assets, net	13,718	16,417
Level 3 | Estimated Fair Value
Financial Assets:
Loans receivable—net	12,958,185	12,143,727
Servicing assets, net	$ 16,461	$ 18,966

Stockholders' Equity - Discussi

Stockholders' Equity - Discussion of Equity (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended	13 Months Ended	16 Months Ended
	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2018	Jun. 30, 2020	Sep. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Equity [Abstract]
Total stockholders’ equity		$ 2,040,561,000	$ 2,031,284,000	$ 2,040,561,000	$ 2,031,284,000	$ 1,903,211,000	$ 2,030,776,000	$ 2,040,561,000	$ 2,036,011,000	$ 1,995,172,000
Share repurchase program, authorized amount	$ 50,000,000					150,000,000				$ 50,000,000
Common stock repurchased and recorded as treasury stock (in shares)	2,716,034	0					12,661,581	12,661,581
Repurchase of treasury stock	$ 36,200,000			$ 36,180,000		$ 150,000,000	$ 200,000,000	$ 200,000,000
Dividends paid (in dollars per share)		$ 0.14	$ 0.14	$ 0.42
Allocated share-based compensation expense		$ 2,200,000	$ 1,600,000	$ 6,000,000	3,900,000
Gains (Losses) on Sales of Other Real Estate		$ (27,000)	$ (1,000)	$ 108,000	$ 14,000

Stockholders' Equity - Changes

Stockholders' Equity - Changes in Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 2,030,776	$ 1,995,172	$ 2,036,011	$ 1,903,211
Unrealized gain on securities available for sale	(303)	14,160	41,820	71,349
Unrealized loss on interest rate swaps used for cash flow hedge	54	0	(796)	0
Reclassification adjustments for net gains realize in net income	(7,510)	(153)	(7,649)	(282)
Tax effect	2,292	(4,157)	(9,842)	(21,089)
Other comprehensive (loss) income, net of tax	(5,467)	9,850	23,533	49,978
Balance at end of period	2,040,561	2,031,284	2,040,561	2,031,284
Accumulated other comprehensive income, net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	38,149	7,423	9,149	(32,705)
Other comprehensive (loss) income, net of tax	(5,467)	9,850	23,533	49,978
Balance at end of period	$ 32,682	$ 17,273	$ 32,682	$ 17,273

Stock-Based Compensation - Plan

Stock-Based Compensation - Plan Description (Details) - shares	9 Months Ended
	Sep. 30, 2020	May 23, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future grant (in shares)	2,933,222
ISOs, SARs, and NQSOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term	10 years
ISOs, SARs, and NQSOs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
ISOs, SARs, and NQSOs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	5 years
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
2019 Stock Incentive Plan
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 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock, percent	100.00%
2019 Stock Incentive Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term	10 years

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2020USD ($)$ / sharesshares
Number of Shares
Outstanding - beginning of period (in shares) | shares	935,211
Granted (in shares) | shares	0
Exercised (in shares) | shares	0
Expired (in shares) | shares	(21,495)
Forfeited (in shares) | shares	(4,000)
Outstanding - end of period (in shares) | shares	909,716
Weighted-Average Exercise Price Per Share
Outstanding - beginning of period (in dollars per share) | $ / shares	$ 15.34
Granted (in dollars per share) | $ / shares	0
Exercised (in dollars per share) | $ / shares	0
Expired (in dollars per share) | $ / shares	16.13
Forfeited (in dollars per share) | $ / shares	17.18
Outstanding - end of period (in dollars per share) | $ / shares	$ 15.32
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options exercisable - end of period (in shares) | shares	867,716
Options exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) | $ / shares	$ 15.23
Outstanding, Weighted-Average Remaining Contractual Life (Years)	4 years 8 months 23 days
Options exercisable, Weighted-Average Remaining Contractual Life (Years)	4 years 8 months 1 day
Outstanding, Aggregate Intrinsic Value | $	$ 267
Options exercisable, Aggregate Intrinsic Value | $	$ 267

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock and Performance Unit Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Allocated share-based compensation expense	$ 2,200	$ 1,600	$ 6,000	$ 3,900
Tax benefit from compensation expense	507	400	1,400	984
Unrecognized compensation expense related to non-vested stock option grants	$ 125		$ 125
Restricted stock and performance units
Number of Shares
Outstanding - beginning of period (in shares)			1,035,744
Granted (in shares)			1,160,202
Vested (in shares)			(341,740)
Forfeited (in shares)			(121,391)
Outstanding - end of period (in shares)	1,732,815		1,732,815
Weighted-Average Grant Date Fair Value
Outstanding - beginning of period (in dollars per share)			$ 14.08
Granted (in dollars per share)			9.16
Vested (in dollars per share)			14.97
Forfeited (in dollars per share)			12.05
Outstanding - end of period (in dollars per share)	$ 10.75		$ 10.75
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			$ 3,300	1,600
Total compensation cost not yet recognized, period for recognition			1 year 9 months
Unrecognized compensation expense related to non-vested equity instruments other than options	$ 10,700		$ 10,700
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, 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
Allocated share-based compensation expense	$ 108	$ 57	$ 205	$ 182
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, period for recognition			11 months 1 day

Regulatory Matters (Details)

Regulatory Matters (Details) $ in Thousands	Jan. 01, 2020USD ($)	Sep. 30, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201602Member
Company
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital, Actual Amount		$ 1,554,838	$ 1,553,697
Common equity Tier 1 capital, Actual Ratio		0.1136	0.1176
Total capital (to risk-weighted assets), Amount
Total capital, Actual		$ 1,806,112	$ 1,747,611
Total capital, Required For Capital Adequacy Purposes		1,095,346	1,056,664
Total capital, Minimum Capital Adequacy With Capital Conservation Buffer		1,437,641	1,386,871
Tier I capital (to risk-weighted assets), Amount
Tier 1 capital, Actual		1,654,826	1,652,831
Tier 1 capital, Required For Capital Adequacy Purposes		821,509	792,498
Tier 1 capital, Minimum Capital Adequacy With Capital Conservation Buffer		1,163,805	1,122,705
Tier I capital (to average assets), Amount
Tier 1 capital, Actual		1,654,826	1,652,831
Tier 1 capital, Required For Capital Adequacy Purposes		$ 660,470	$ 589,367
Total capital and Tier I capital (to risk-weighted assets), Ratio
Total capital (to Risk Weighted Assets), Actual		0.1319	0.1323
Total capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes		0.0800	0.0800
Total capital (to Risk Weighted assets), Minimum Capital Adequacy With Capital Conservation Buffer		10.50%	10.50%
Tier 1 capital (to Risk Weighted Assets), Actual		0.1209	0.1251
Tier 1 capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes		0.0600	0.0600
Tier 1 capital (to Risk Weighted Assets), Minimum Capital Adequacy With Capital Conservation Buffer		8.50%	8.50%
Tier I capital (to average assets), Ratio
Tier I Capital (to Average Assets), Actual (Leverage)		0.1002	0.1122
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage)		0.0400	0.0400
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital, Actual Amount		$ 1,835,738	$ 1,811,862
Common equity Tier 1 capital, Actual Ratio		0.1341	0.1372
Common equity Tier 1 capital, Required To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		$ 889,882	$ 858,462
Total capital (to risk-weighted assets), Amount
Total capital, Actual		1,987,025	1,906,642
Total capital, Required For Capital Adequacy Purposes		1,095,239	1,056,569
Total capital, Minimum Capital Adequacy With Capital Conservation Buffer		1,437,501	1,386,747
Total capital, Required To Be Well Capitalized Under Prompt Corrective Action Provisions		1,369,049	1,320,711
Tier I capital (to risk-weighted assets), Amount
Tier 1 capital, Actual		1,835,738	1,811,862
Tier 1 capital, Required For Capital Adequacy Purposes		821,429	792,427
Tier 1 capital, Minimum Capital Adequacy With Capital Conservation Buffer		1,163,692	1,122,605
Tier 1 capital, Required To Be Well Capitalized Under Prompt Corrective Action Provisions		1,095,239	1,056,569
Tier I capital (to average assets), Amount
Tier 1 capital, Actual		1,835,738	1,811,862
Tier 1 capital, Required For Capital Adequacy Purposes		660,464	589,604
Tier 1 capital, Required To Be Well Capitalized Under Prompt Corrective Action Provisions		$ 825,580	$ 737,005
Total capital and Tier I capital (to risk-weighted assets), Ratio
Total capital (to Risk Weighted Assets), Actual		0.1451	0.1444
Total capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes		0.0800	0.0800
Total capital (to Risk Weighted assets), Minimum Capital Adequacy With Capital Conservation Buffer		10.50%	10.50%
Total capital (to Risk Weighted Assets), Required To Be Well Capitalized Under Prompt Corrective Action Provisions		0.1000	0.1000
Tier 1 capital (to Risk Weighted Assets), Actual		0.1341	0.1372
Tier 1 capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes		0.0600	0.0600
Tier 1 capital (to Risk Weighted Assets), Minimum Capital Adequacy With Capital Conservation Buffer		8.50%	8.50%
Tier 1 capital (to Risk Weighted Assets), Required To Be Well Capitalized Under Prompt Corrective Action Provisions		0.0800	0.0800
Tier I capital (to average assets), Ratio
Tier I Capital (to Average Assets), Actual (Leverage)		0.1112	0.1229
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage)		0.0400	0.0400
Tier I Capital (to Average Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Leverage)		0.0500	0.0500
Common Equity Tier 1 | Company
Tier I capital (to risk-weighted assets), Amount
Tier 1 capital, Required For Capital Adequacy Purposes		$ 616,132	$ 594,373
Tier 1 capital, Minimum Capital Adequacy With Capital Conservation Buffer		$ 958,428	$ 924,581
Total capital and Tier I capital (to risk-weighted assets), Ratio
Tier 1 capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes		0.0450	0.0450
Tier 1 capital (to Risk Weighted Assets), Minimum Capital Adequacy With Capital Conservation Buffer		7.00%	7.00%
Common Equity Tier 1 | Bank
Tier I capital (to risk-weighted assets), Amount
Tier 1 capital, Required For Capital Adequacy Purposes		$ 616,072	$ 594,320
Tier 1 capital, Minimum Capital Adequacy With Capital Conservation Buffer		$ 958,334	$ 924,498
Total capital and Tier I capital (to risk-weighted assets), Ratio
Tier 1 capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes		0.0450	0.0450
Tier 1 capital (to Risk Weighted Assets), Minimum Capital Adequacy With Capital Conservation Buffer		7.00%	7.00%
Tier 1 capital (to Risk Weighted Assets), Required To Be Well Capitalized Under Prompt Corrective Action Provisions		0.0650	0.0650
Cumulative Effect, Period of Adoption, Adjustment
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cumulative-effect adjustment, net of taxes to decrease retained earnings	$ 18,800

Revenue Recognition - Service C

Revenue Recognition - Service Charged on Deposit Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	$ 2,736	$ 4,690	$ 9,452	$ 13,423
Wire transfer fees	892	1,058	2,710	3,458
Wire transfer fees
Disaggregation of Revenue [Line Items]
Wire transfer fees	812	963	2,383	3,063
Foreign exchange fees
Disaggregation of Revenue [Line Items]
Wire transfer fees	80	95	327	395
Noninterest Bearing Deposits
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	2,714	4,671	9,383	13,371
Noninterest Bearing Deposits | Monthly service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	303	395	1,001	1,224
Noninterest Bearing Deposits | Customer analysis charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	1,693	2,194	5,074	5,788
Noninterest Bearing Deposits | NSF charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	608	1,887	2,824	5,754
Noninterest Bearing Deposits | Other service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	110	195	484	605
Interest-bearing Deposits | Monthly service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	$ 22	$ 19	$ 69	$ 52

Revenue Recognition - OREO Inco

Revenue Recognition - OREO Income (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Net losses on sales of OREO	$ 27	$ 1	$ (108)	$ (14)