Hope Bancorp (HOPE) 10-Q 8 Aug 23 2023 Q2 Quarterly report Financial data

Cover

Cover - shares	6 Months Ended
	Jun. 30, 2023	Jul. 31, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
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)		120,018,222
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001128361
Current Fiscal Year End Date	--12-31

Consolidated Statements Of Fina

Consolidated Statements Of Financial Condition - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Cash and cash equivalents:
Cash and due from banks	$ 208,069	$ 213,774
Interest earning cash in other banks	2,094,270	293,002
Total cash and cash equivalents	2,302,339	506,776
Interest earning deposits in other financial institutions	0	735
Investment securities available for sale (“AFS”), at fair value	1,916,586	1,972,129
Amortized Cost	269,760	271,066
Equity investments	42,963	42,396
Loans held for sale, at lower of cost or fair value	49,246	49,245
Loans receivable, net of allowance for credit losses of $172,996 and $162,359 at June 30, 2023 and December 31, 2022, respectively	14,691,814	15,241,181
Other real estate owned (“OREO”), net	938	2,418
Federal Home Loan Bank (“FHLB”) stock, at cost	17,250	18,630
Premises and equipment, net	50,513	46,859
Accrued interest receivable	60,118	55,460
Deferred tax assets, net	146,301	150,409
Customers’ liabilities on acceptances	659	818
Bank owned life insurance (“BOLI”)	88,238	77,078
Investments in affordable housing partnerships	44,026	47,711
Operating lease right-of-use assets (“ROU”), net	53,744	55,034
Goodwill	464,450	464,450
Core deposit intangible assets, net	4,830	5,726
Servicing assets, net	11,532	11,628
Other assets	150,831	144,742
Total assets	20,366,138	19,164,491
Deposits:
Noninterest bearing	4,229,247	4,849,493
Interest bearing:
Money market and NOW accounts	4,188,584	5,615,784
Savings deposits	224,495	283,464
Time deposits	6,977,026	4,990,060
Total deposits	15,619,352	15,738,801
FHLB and FRB borrowings	2,260,000	865,000
Convertible notes, net	444	217,148
Subordinated debentures, net	107,188	106,565
Accrued interest payable	109,236	26,668
Acceptances outstanding	659	818
Operating lease liabilities	57,951	59,088
Commitments to fund investments in affordable housing partnerships	9,322	11,792
Other liabilities	133,988	119,283
Total liabilities	18,298,140	17,145,163
STOCKHOLDERS’ EQUITY:
Common stock, $0.001 par value; 150,000,000 authorized shares: issued and outstanding 137,397,723 and 120,014,888 shares, respectively, at June 30, 2023, and issued and outstanding 136,878,044 and 119,495,209 shares, respectively, at December 31, 2022	137	137
Additional paid-in capital	1,433,788	1,431,003
Retained earnings	1,127,624	1,083,712
Treasury stock, at cost; 17,382,835 and 17,382,835 shares at June 30, 2023 and December 31, 2022, respectively	(264,667)	(264,667)
Accumulated other comprehensive loss, net	(228,884)	(230,857)
Total stockholders’ equity	2,067,998	2,019,328
Total liabilities and stockholders’ equity	$ 20,366,138	$ 19,164,491

Consolidated Statements Of Fi_2

Consolidated Statements Of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Fair Value	$ 255,344	$ 258,407
Total	$ 172,996	$ 162,359
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)	137,397,723	136,878,044
Common stock, shares outstanding (in shares)	120,014,888	119,495,209
Treasury stock, at cost, shares repurchased (in shares)	17,382,835	17,382,835

Consolidated Statements Of Inco

Consolidated Statements Of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
INTEREST INCOME:
Interest and fees on loans	$ 225,671	$ 145,024	$ 441,606	$ 277,696
Interest on investment securities	15,534	12,308	30,659	23,964
Interest income from cash and deposits at other banks	25,295	74	30,217	211
Interest on other investments	684	418	1,379	825
Total interest income	267,184	157,824	503,861	302,696
INTEREST EXPENSE:
Interest on deposits	109,724	12,220	202,072	20,896
Interest Expense, FHLB and FRB borrowings	23,622	1,457	30,320	2,144
Interest on other borrowings and debt	3,149	2,609	6,902	4,942
Total interest expense	136,495	16,286	239,294	27,982
NET INTEREST INCOME BEFORE PROVISION (CREDIT) FOR CREDIT LOSSES	130,689	141,538	264,567	274,714
PROVISION (CREDIT) FOR CREDIT LOSSES	8,900	3,200	10,600	(7,800)
NET INTEREST INCOME AFTER PROVISION (CREDIT) FOR CREDIT LOSSES	121,789	138,338	253,967	282,514
NONINTEREST INCOME:
Service fees on deposit accounts	2,325	2,270	4,546	4,244
International service fees	854	744	1,942	1,538
Wire transfer fees	850	858	1,623	1,758
Swap fees	674	175	716	960
Net gains on sales of SBA loans	1,872	5,804	4,097	11,407
Net gains on sales of residential mortgage loans	82	76	146	833
Other income and fees	10,357	2,819	14,922	5,192
Total noninterest income	17,014	12,746	27,992	25,932
NONINTEREST EXPENSE:
Salaries and employee benefits	52,305	51,058	109,474	98,803
Occupancy	6,967	7,178	14,488	14,513
Furniture and equipment	5,393	4,778	10,451	9,422
Data processing and communications	2,917	2,893	5,739	5,354
Professional fees	1,416	1,582	2,959	3,793
Amortization of investments in affordable housing partnerships	1,912	1,844	3,628	3,863
FDIC assessments	4,691	1,450	6,472	3,019
Earned interest credit	5,090	835	9,517	1,311
Other	6,642	8,747	14,959	15,660
Total noninterest expense	87,333	80,365	177,687	155,738
INCOME BEFORE INCOME TAXES	51,470	70,719	104,272	152,708
INCOME TAX PROVISION	13,448	18,631	27,129	39,882
NET INCOME	$ 38,022	$ 52,088	$ 77,143	$ 112,826
EARNINGS PER COMMON SHARE
Basic (in dollars per share)	$ 0.32	$ 0.43	$ 0.64	$ 0.94
Diluted (in dollars per share)	$ 0.32	$ 0.43	$ 0.64	$ 0.93

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 38,022	$ 52,088	$ 77,143	$ 112,826
Other comprehensive (loss) income:
Change in unrealized net holding (losses) gains on securities AFS	(31,071)	(55,658)	144	(196,931)
Change in unrealized net holding losses on securities transferred from AFS to HTM	0	(36,576)	0	(36,576)
Change in unrealized net holding gains on interest rate contracts used in cash flow hedges	13,653	2,006	7,715	6,008
Reclassification adjustments for net (gains) losses realized in net income	(3,322)	(38)	(5,060)	26
Tax effect	6,113	26,724	(826)	67,178
Other comprehensive (loss) income, net of tax	(14,627)	(63,542)	1,973	(160,295)
Total comprehensive income (loss)	$ 23,395	$ (11,454)	$ 79,116	$ (47,469)

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 loss, net
Balance at beginning of period (in shares) at Dec. 31, 2021		120,006,452
Balance at beginning of period at Dec. 31, 2021	$ 2,092,983	$ 136	$ 1,421,698	$ 932,561	$ (250,000)	$ (11,412)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)		506,473
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations	531	$ 1	530
Stock-based compensation	2,663		2,663
Cash dividends declared on common stock	(33,672)			(33,672)
Comprehensive loss:
Net income	112,826			112,826
Other comprehensive income (loss)	(160,295)					(160,295)
Repurchase of treasury stock (in shares)		(1,038,986)
Repurchase of treasury stock	(14,667)				(14,667)
Balance at end of period (in shares) at Jun. 30, 2022		119,473,939
Balance at end of period at Jun. 30, 2022	2,000,369	$ 137	1,424,891	1,011,715	(264,667)	(171,707)
Balance at beginning of period (in shares) at Mar. 31, 2022		120,327,689
Balance at beginning of period at Mar. 31, 2022	2,041,057	$ 137	1,422,602	976,483	(250,000)	(108,165)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)		185,236
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations	0
Stock-based compensation	2,289		2,289
Cash dividends declared on common stock	(16,856)			(16,856)
Comprehensive loss:
Net income	52,088			52,088
Other comprehensive income (loss)	(63,542)					(63,542)
Repurchase of treasury stock					(14,667)
Balance at end of period (in shares) at Jun. 30, 2022		119,473,939
Balance at end of period at Jun. 30, 2022	2,000,369	$ 137	1,424,891	1,011,715	(264,667)	(171,707)
Balance at beginning of period (in shares) at Dec. 31, 2022		119,495,209
Balance at beginning of period at Dec. 31, 2022	2,019,328	$ 137	1,431,003	1,083,712	(264,667)	(230,857)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Convertible debt, cumulative effect on retained earnings before tax | ASU 2022-02	407			407
Convertible debt, cumulative effect on retained earnings before tax | ASU 2022-02, tax impact	(120)			(120)
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)		519,679
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations	0
Stock-based compensation	2,785		2,785
Cash dividends declared on common stock	(33,518)			(33,518)
Comprehensive loss:
Net income	77,143			77,143
Other comprehensive income (loss)	1,973					1,973
Repurchase of treasury stock	0
Balance at end of period (in shares) at Jun. 30, 2023		120,014,888
Balance at end of period at Jun. 30, 2023	2,067,998	$ 137	1,433,788	1,127,624	(264,667)	(228,884)
Balance at beginning of period (in shares) at Mar. 31, 2023		119,865,732
Balance at beginning of period at Mar. 31, 2023	2,058,580	$ 137	1,430,977	1,106,390	(264,667)	(214,257)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)		149,156
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations	0
Stock-based compensation	2,811		2,811
Cash dividends declared on common stock	(16,788)			(16,788)
Comprehensive loss:
Net income	38,022			38,022
Other comprehensive income (loss)	(14,627)					(14,627)
Balance at end of period (in shares) at Jun. 30, 2023		120,014,888
Balance at end of period at Jun. 30, 2023	$ 2,067,998	$ 137	$ 1,433,788	$ 1,127,624	$ (264,667)	$ (228,884)

Consolidated Statements Of Ch_2

Consolidated Statements Of Changes In Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Stockholders' Equity [Abstract]
Cash dividends declared on common stock (in dollars per share)	$ 0.14	$ 0.14	$ 0.28	$ 0.28
ASU 2022-02
Adoption of ASU			ASU 2022-02
ASU 2022-02, tax impact
Adoption of ASU			ASU 2022-02, tax impact

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 77,143	$ 112,826
Adjustments to reconcile net income to net cash from operating activities:
Discount accretion, net of depreciation and amortization	7,344	11,619
Stock-based compensation expense	5,734	6,058
Provision (credit) for credit losses	10,600	(7,800)
Provision for unfunded loan commitments	1,730	380
Provision for accrued interest receivables on loans	0	1,500
Distribution gain from investment in affordable housing partnerships	5,819	0
Net gains on sales of SBA loans	(4,018)	(11,693)
Net change in fair value of equity investments with readily determinable fair value	0	2,112
Amortization of investments in affordable housing partnerships	3,534	3,712
Gain on debt extinguishment	(405)	0
Net change in deferred income taxes	3,164	2,889
Proceeds from sales of loans held for sale	57,348	155,152
Originations of loans held for sale	(46,732)	(20,569)
Originations of servicing assets	(1,849)	(2,890)
Net change in accrued interest receivable	(6,239)	1,080
Net change in other assets	(479)	(4,707)
Net change in accrued interest payable	82,568	(160)
Net change in other liabilities	18,794	17,084
Net cash provided by operating activities	202,418	266,593
CASH FLOWS FROM INVESTING ACTIVITIES
Redemption of interest earning deposits in other financial institutions	735	6,403
Purchase of securities	(180,758)	(122,340)
Proceeds from matured, called, or paid-down securities	234,135	211,023
Purchase of securities	(5,545)	(13,971)
Proceeds from matured, called, or paid-down securities	8,680	25
Purchase of equity investments	(569)	(800)
Proceeds from sales of other loans held for sale previously classified as held for investment	206,993	66,518
Purchase of loans receivable	(1,368)	(27,936)
Net change in loans receivable	326,412	(709,763)
Proceeds from sales of OREO	1,209	331
Purchase of FHLB stock	(4,650)	(18,078)
Redemption of FHLB stock	6,030	17,536
Purchase of premises and equipment	(7,719)	(4,525)
Purchase of BOLI policy	(11,000)	0
Proceeds from BOLI death benefits	587	0
Investments in affordable housing partnerships	(2,470)	(1,197)
Net cash provided by (used in) investing activities	570,702	(596,774)
CASH FLOWS FROM FINANCING ACTIVITIES
Net change in deposits	(119,449)	(10,820)
Proceeds from FHLB advances	5,250,000	18,460,885
Repayment of FHLB advances	(5,750,000)	(18,187,885)
Proceeds from FRB borrowings	35,896,000	845,000
Repayment of FRB borrowings	(34,001,000)	(845,000)
Repurchase of convertible notes	(19,534)	0
Repayments of Debt	(197,107)	0
Purchase of treasury stock	0	(14,667)
Cash dividends paid on common stock	(33,518)	(33,672)
Taxes paid in net settlement of restricted stock	(2,949)	(3,395)
Issuance of additional stock pursuant to various stock plans	0	531
Net cash provided by financing activities	1,022,443	210,977
NET CHANGE IN CASH AND CASH EQUIVALENTS	1,795,563	(119,204)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	506,776	316,266
CASH AND CASH EQUIVALENTS, END OF PERIOD	2,302,339	197,062
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Interest paid	155,761	27,074
Income taxes paid	5,069	55,222
SUPPLEMENTAL DISCLOSURES OF NON-CASH ACTIVITIES
Transfer from loans receivable to loans held for sale	237,259	172,255
Transfer from loans held for sale to loans receivable	22,400	4,097
Transfer from investment securities available for sale to held to maturity, at fair value	0	238,966
Lease liabilities arising from obtaining ROU assets	$ 6,113	$ 13,438

Hope Bancorp, Inc.

Hope Bancorp, Inc.	6 Months Ended
	Jun. 30, 2023
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”). At June 30, 2023, the Bank operated 53 full-service branches in California, Washington, Texas, Illinois, New York, New Jersey, Virginia, Alabama and Georgia. The Bank also operated SBA loan production offices in Seattle, Denver, Dallas, Atlanta, Portland, New York City, Northern California and Houston; commercial loan production offices in Northern California, Seattle and Tampa; residential mortgage loan production offices in Southern California; and a representative office in Seoul, 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	6 Months Ended
	Jun. 30, 2023
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 at December 31, 2022, which was from the audited financial statements included in the Company’s 2022 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 June 30, 2023 and December 31, 2022, and the results of operations for the three and six months ended June 30, 2023 and 2022. Certain reclassifications have been made to prior period amounts to conform to the current year presentation. The results of operations for the interim periods are not necessarily indicative of results to be anticipated for the full year. The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ significantly from those estimates. These unaudited consolidated financial statements should be read along with the audited consolidated financial statements and accompanying notes included in the Company’s 2022 Annual Report on Form 10-K. Significant Accounting Policies Our accounting policies are described in Note 1 - Summary of Significant Accounting Policies, of our audited consolidated financial statements included in our 2022 Annual Report Form 10-K. Significant changes to accounting policies from those disclosed in our audited consolidated financial statements included in our 2022 Annual Report Form 10-K are presented below. Loan Modifications to Borrowers Experiencing Financial Difficulty. Prior to the adoption of ASU 2022-02, we accounted for the modification to the contractual terms of a loan that resulted in granting a concession to a borrower experiencing financial difficulties as a troubled debt restructuring (“TDR”). Effective January 1, 2023, we adopted ASU 2022-02, which eliminated TDR accounting prospectively for all restructurings occurring on or after January 1, 2023. Loans that were considered a TDR prior to the adoption of ASU 2022-02 will be collectively evaluated for Allowance for Credit Losses (“ACL”) purposes until the loan is paid off, liquidated, or subsequently modified. Since adoption of ASU 2022-02 on January 1, 2023, we have evaluated all loan modifications under ASC 310-20 to determine whether a modification made to a borrower results in a new loan or is a continuation of the existing loan. GAAP requires the Company to make certain disclosures related to these loans, including certain types of modifications, as well as how such loans have performed since their modifications. Please see Note 6—“Loans Receivable and Allowance for Credit Losses” for additional information concerning loan modifications to borrowers experiencing financial difficulty.

Earnings Per Share ("EPS")

Earnings Per Share ("EPS")	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Earnings Per Share ("EPS")	Earnings Per Share (“EPS”) Earnings per share are computed by dividing net income by the weighted average number of common shares outstanding for the period. 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. Diluted EPS reflects the potential dilution that could occur if stock options, convertible notes, employee stock purchase program (“ESPP”) shares, 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 June 30, 2023 and 2022, stock options and restricted share awards of 2,626,620 and 1,523,255 shares of common stock, respectively, were excluded in computing diluted earnings per common share because they were anti-dilutive. For the six months ended June 30, 2023 and 2022, stock options and restricted share awards of 1,290,587 and 681,787 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, of which $444 thousand remained outstanding at June 30, 2023. 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 Note 10—“Convertible Notes and Subordinated Debentures” for additional information regarding convertible notes issued). With the adoption of ASU 2020-06, the if-converted method is required for calculating dilutive EPS for all convertible instruments since the treasury stock method is no longer available. Under the if-converted method, the denominator of the diluted EPS calculation is adjusted to reflect the full number of common shares issuable upon conversion, while the numerator is adjusted to add back after-tax interest expense for the period. For the three and six months ended June 30, 2023 and 2022, 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 based on the Company’s common stock price during the three and six months ended June 30, 2023 and 2022, as the conversion price exceeded the market price of the Company’s stock. The following tables present computations of basic and diluted EPS for the three and six months ended June 30, 2023 and 2022. Three Months Ended June 30, 2023 2022 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 $ 38,022 119,953,174 $ 0.32 $ 52,088 120,219,919 $ 0.43 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 176,185 479,719 Diluted EPS - common stock $ 38,022 120,129,359 $ 0.32 $ 52,088 120,699,638 $ 0.43 Six Months Ended June 30, 2023 2022 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 $ 77,143 119,753,321 $ 0.64 $ 112,826 120,175,894 $ 0.94 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 426,122 722,711 Diluted EPS - common stock $ 77,143 120,179,443 $ 0.64 $ 112,826 120,898,605 $ 0.93

Equity Investments

Equity Investments	6 Months Ended
	Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Equity Investments	Equity Investments Equity investments with readily determinable fair values at June 30, 2023 and December 31, 2022, consisted of mutual funds in the amounts of $4.3 million and $4.3 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 six months ended June 30, 2023 and 2022, were recorded in other noninterest income and fees as summarized in the table below: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Net change in fair value recorded during the period on equity investments with readily determinable fair value $ (69) $ (865) $ — $ (2,112) Less: 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 held at the end of the period $ (69) $ (865) $ — $ (2,112) At June 30, 2023 and December 31, 2022, the Company also had equity investments without readily determinable fair values, which are carried at cost less any determined impairment. The balance of these investments is adjusted for changes in subsequent observable prices. At June 30, 2023, the total balance of equity investments without readily determinable fair values included in “Equity investments” on the Consolidated Statements of Financial Condition was $38.7 million, consisting of $370 thousand in correspondent bank stock, $1.0 million in Community Development Financial Institutions (“CDFI”) investments, and $37.3 million in Community Reinvestment Act (“CRA”) investments. At December 31, 2022, the total balance of equity investments without readily determinable fair values was $38.1 million, consisting of $370 thousand in correspondent bank stock, $1.0 million in CDFI investments, and $36.7 million in CRA investments.

Securities Available for Sale

Securities Available for Sale	6 Months Ended
	Jun. 30, 2023
Debt Securities, Available-for-Sale [Abstract]
Securities Available for Sale	Investment Securities The following is a summary of investment securities as of the dates indicated: June 30, 2023 December 31, 2022 Amortized Gross Gross Fair Amortized Gross Gross Fair (Dollars in thousands) Debt securities available for sale: U.S. Treasury securities $ 3,994 $ — $ (90) $ 3,904 $ 3,990 $ — $ (104) $ 3,886 U.S. Government agency and U.S. Government sponsored enterprises: Agency securities 4,000 — (163) 3,837 4,000 — (133) 3,867 Collateralized mortgage obligations 904,848 — (153,108) 751,740 947,541 — (153,842) 793,699 Mortgage-backed securities: Residential 522,145 — (86,997) 435,148 544,084 — (90,907) 453,177 Commercial 407,972 — (55,121) 352,851 417,241 — (48,954) 368,287 Asset-backed securities 153,536 — (3,794) 149,742 153,539 — (5,935) 147,604 Corporate securities 23,326 — (4,754) 18,572 23,351 — (4,494) 18,857 Municipal securities 213,913 1,082 (14,203) 200,792 195,675 790 (13,713) 182,752 Total investment securities available for sale $ 2,233,734 $ 1,082 $ (318,230) $ 1,916,586 $ 2,289,421 $ 790 $ (318,082) $ 1,972,129 Debt securities held to maturity: U.S. Government agency and U.S. Government sponsored enterprises: Mortgage-backed securities: Residential $ 154,963 $ — $ (6,919) $ 148,044 $ 157,881 $ — $ (7,041) $ 150,840 Commercial 114,797 — (7,497) 107,300 113,185 1 (5,619) 107,567 Total investment securities held to maturity $ 269,760 $ — $ (14,416) $ 255,344 $ 271,066 $ 1 $ (12,660) $ 258,407 The Company has elected to exclude accrued interest from the amortized cost of its investment debt securities. Accrued interest receivable for investment debt securities at June 30, 2023 and December 31, 2022, totaled $8.5 million and $7.8 million, respectively. At June 30, 2023 and December 31, 2022, 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. At June 30, 2023 and December 31, 2022, $223.0 million and $223.1 million in unrealized losses on investment securities AFS, net of taxes, respectively, were included in accumulated other comprehensive income (loss). For the three and six months ended June 30, 2023 and 2022, there were no reclassifications out of accumulated other comprehensive income (loss) into earnings resulting from the sale of investments securities AFS. The following table presents a breakdown of interest income recorded for investment securities that are taxable and nontaxable. Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Interest income on investment securities Taxable $ 14,466 $ 11,997 $ 28,512 $ 23,397 Nontaxable 1,068 311 2,147 567 Total $ 15,534 $ 12,308 $ 30,659 $ 23,964 The amortized cost and estimated fair value of investment securities at June 30, 2023, by contractual maturity, are presented in the table below. Collateralized mortgage obligations, mortgage-backed securities, and asset-backed securities are presented by final maturity. 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. Available for Sale Held to Maturity Amortized Estimated Amortized Estimated (Dollars in thousands) Debt securities: Due within one year $ 4,984 $ 4,885 $ — $ — Due after one year through five years 147,521 136,859 26,641 25,589 Due after five years through ten years 108,760 97,284 8,546 8,120 Due after ten years 1,972,469 1,677,558 234,573 221,635 Total $ 2,233,734 $ 1,916,586 $ 269,760 $ 255,344 Securities with carrying values of approximately $2.01 billion and $360.7 million at June 30, 2023 and December 31, 2022, 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. The length of time that the individual securities have been in a continuous unrealized loss position is not a factor in determining credit impairment with the adoption of current expected credit losses (“CECL”). June 30, 2023 Less than 12 months 12 months or longer Total Description of Number Fair Gross Number Fair Gross Number Fair Gross (Dollars in thousands) U.S. Treasury securities — $ — $ — 1 $ 3,904 $ (90) 1 $ 3,904 $ (90) U.S. Government agency and U.S. Government sponsored enterprises: Agency securities — — — 1 3,837 (163) 1 3,837 (163) Collateralized mortgage obligations 6 14,563 (1,078) 112 737,177 (152,030) 118 751,740 (153,108) Mortgage-backed securities: Residential 2 5,062 (266) 63 430,086 (86,731) 65 435,148 (86,997) Commercial 8 48,910 (2,633) 48 303,941 (52,488) 56 352,851 (55,121) Asset-backed securities — — — 18 149,742 (3,794) 18 149,742 (3,794) Corporate securities — — — 6 18,572 (4,754) 6 18,572 (4,754) Municipal securities 29 73,327 (1,148) 38 82,766 (13,055) 67 156,093 (14,203) Total 45 $ 141,862 $ (5,125) 287 $ 1,730,025 $ (313,105) 332 $ 1,871,887 $ (318,230) December 31, 2022 Less than 12 months 12 months or longer Total Description of Number Fair Gross Number Fair Gross Number Fair Gross (Dollars in thousands) U.S. Treasury securities 1 $ 3,886 $ (104) — $ — $ — 1 $ 3,886 $ (104) U.S. Government agency and U.S. Government sponsored enterprises: Agency securities 1 3,867 (133) — — — 1 3,867 (133) Collateralized mortgage obligations 61 150,419 (14,888) 59 643,280 (138,954) 120 793,699 (153,842) Mortgage-backed securities: Residential 23 55,645 (5,616) 42 397,532 (85,291) 65 453,177 (90,907) Commercial 29 172,963 (12,156) 26 195,324 (36,798) 55 368,287 (48,954) Asset-backed securities 3 21,836 (716) 15 125,768 (5,219) 18 147,604 (5,935) Corporate securities 1 3,401 (600) 5 15,456 (3,894) 6 18,857 (4,494) Municipal securities 31 76,942 (3,207) 32 65,730 (10,506) 63 142,672 (13,713) Total 150 $ 488,959 $ (37,420) 179 $ 1,443,090 $ (280,662) 329 $ 1,932,049 $ (318,082) The Company had U.S. Treasury securities, agency securities, collateralized mortgage obligations, mortgage-backed, asset-backed, corporate, and municipal securities classified as AFS that were in a continuous loss position for twelve months or longer at June 30, 2023. The collateralized mortgage obligations and mortgage-backed securities were investments in U.S. Government agency and U.S. Government sponsored enterprises and have high credit ratings (“AA” grade or better). The interest on other securities that were in an unrealized loss position has been paid as agreed, and the Company believes this will continue in the future and that the securities will be paid in full as scheduled. The market value declines for these securities were primarily due to movements in interest rates and are not reflective of management’s expectations of the Company’s ability to fully recover any unrealized losses, which may be at maturity. With the adoption of CECL, the length of time that the fair value of investment securities has been less than amortized cost is not considered when assessing for credit impairment. Allowance for Credit Losses on Securities Available for Sale— The Company evaluates investment securities AFS in unrealized loss positions for impairment related to credit losses on at least a quarterly basis. Investment securities AFS in unrealized loss positions are first assessed as to whether the Company intends to sell, or if it is more likely than not that the Company 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, the Company compares 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 are recognized in other comprehensive income, net of applicable taxes. The Company did not have an allowance for credit losses on investment securities AFS at June 30, 2023 and December 31, 2022. 83.1% of the Company’s investment portfolio at June 30, 2023, 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 is subject to a cap as part of the Housing and Economic Recovery Act of 2008. Nonetheless, at this time the Company does 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, the Company concluded that a zero allowance approach for these investments was appropriate. The Company had one U.S. Treasury note issued and guaranteed by the U.S. government. The Company also had 18 asset-backed securities, six corporate securities, and 67 municipal bonds in unrealized loss positions at June 30, 2023. The Company performed an assessment of investments in unrealized loss positions for credit impairment and concluded that no allowance for credit losses was required at June 30, 2023.

Loans Receivable and Allowance

Loans Receivable and Allowance for Credit Losses	6 Months Ended
	Jun. 30, 2023
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 segment: June 30, 2023 December 31, 2022 (Dollars in thousands) Loan portfolio composition Commercial real estate (“CRE”) loans $ 9,192,160 $ 9,414,580 Commercial and industrial (“C&I”) loans 4,805,126 5,109,532 Residential mortgage loans 834,377 846,080 Consumer and other loans 33,147 33,348 Total loans receivable, net of deferred costs and fees 14,864,810 15,403,540 Allowance for credit losses (172,996) (162,359) Loans receivable, net of allowance for credit losses $ 14,691,814 $ 15,241,181 Loans receivable is stated at the amount of unpaid principal, adjusted for net deferred fees and costs, premiums and discounts, and purchase accounting fair value adjustments. The Company had net deferred fees of $10.5 million and $11.1 million at June 30, 2023 and December 31, 2022, respectively. The loan portfolio consists of four segments: CRE loans, C&I loans, residential mortgage loans, and consumer and other loans. CRE loans are extended for the purchase and refinance of commercial real estate and are generally secured by first deeds of trust and collateralized by residential or commercial properties. C&I loans are loans provided to businesses for various purposes such as working capital, purchasing inventory, debt refinancing, business acquisitions, international trade finance activities, and other business-related financing needs. This segment includes warehouse lines of credit for residential mortgages and Small Business Administration (“SBA”) 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. The Company had loans receivable of $14.86 billion at June 30, 2023, a decrease of $538.7 million, or 3.5%, from December 31, 2022. The largest decrease in loans receivable during the six months ended June 30, 2023, was in C&I and CRE loans. During the six months ended June 30, 2023, loan payoffs and paydowns exceeded new origination volume, reflecting, in part, declining customer demand in a high interest rate environment, and the Company’s disciplined pricing and conservative underwriting. The Company had $49.2 million in loans held for sale at June 30, 2023, compared with $49.2 million at December 31, 2022. Loans held for sale at June 30, 2023, consisted of $3.2 million in residential mortgage loans and $46.0 million in other loans. Loans held for sale are not included in the loans receivable table presented above. The tables below detail the activity in the allowance for credit losses (“ACL”) by portfolio segment for the three and six months ended June 30, 2023 and 2022. CRE Loans C&I Loans Residential Mortgage Loans Consumer and Other Loans Total (Dollars in thousands) Three Months Ended June 30, 2023 Balance, beginning of period $ 108,835 $ 42,790 $ 11,253 $ 666 $ 163,544 Provision (credit) for credit losses (3,076) 11,013 730 233 8,900 Loans charged off (561) (298) — (120) (979) Recoveries of charge offs 123 1,389 — 19 1,531 Balance, end of period $ 105,321 $ 54,894 $ 11,983 $ 798 $ 172,996 Six Months Ended June 30, 2023 Balance, beginning of period $ 95,884 $ 56,872 $ 8,920 $ 683 $ 162,359 ASU 2022-02 day 1 adoption adjustment 19 (426) — — (407) Provision (credit) for credit losses 9,787 (2,487) 3,063 237 10,600 Loans charged off (561) (738) — (175) (1,474) Recoveries of charge offs 192 1,673 — 53 1,918 Balance, end of period $ 105,321 $ 54,894 $ 11,983 $ 798 $ 172,996 CRE Loans C&I Loans Residential Mortgage Loans Consumer and Other Loans Total (Dollars in thousands) Three Months Ended June 30, 2022 Balance, beginning of period $ 106,545 $ 35,676 $ 4,262 $ 967 $ 147,450 Provision (credit) for credit losses (7,229) 8,715 1,817 (103) 3,200 Loans charged off (476) (172) — (64) (712) Recoveries of charge offs 984 633 — 25 1,642 Balance, end of period $ 99,824 $ 44,852 $ 6,079 $ 825 $ 151,580 Six Months Ended June 30, 2022 Balance, beginning of period $ 108,440 $ 27,811 $ 3,316 $ 983 $ 140,550 Provision (credit) for credit losses (25,542) 15,051 2,763 (72) (7,800) Loans charged off (1,751) (349) — (115) (2,215) Recoveries of charge offs 18,677 2,339 — 29 21,045 Balance, end of period $ 99,824 $ 44,852 $ 6,079 $ 825 $ 151,580 The following tables break out the allowance for credit losses and loan balance by measurement methodology at June 30, 2023 and December 31, 2022: June 30, 2023 CRE Loans C&I Loans Residential Mortgage Loans Consumer and Other Loans Total (Dollars in thousands) Allowance for credit losses: Individually evaluated $ 1,150 $ 11,706 $ 245 $ 72 $ 13,173 Collectively evaluated 104,171 43,188 11,738 726 159,823 Total $ 105,321 $ 54,894 $ 11,983 $ 798 $ 172,996 Loans outstanding: Individually evaluated $ 29,096 $ 23,042 $ 8,583 $ 180 $ 60,901 Collectively evaluated 9,163,064 4,782,084 825,794 32,967 14,803,909 Total $ 9,192,160 $ 4,805,126 $ 834,377 $ 33,147 $ 14,864,810 December 31, 2022 CRE Loans C&I Loans Residential Mortgage Loans Consumer and Other Loans Total (Dollars in thousands) Allowance for credit losses: Individually evaluated $ 870 $ 2,941 $ 24 $ 21 $ 3,856 Collectively evaluated 95,014 53,931 8,896 662 158,503 Total $ 95,884 $ 56,872 $ 8,920 $ 683 $ 162,359 Loans outstanding: Individually evaluated $ 43,461 $ 12,477 $ 9,775 $ 436 $ 66,149 Collectively evaluated 9,371,119 5,097,055 836,305 32,912 15,337,391 Total $ 9,414,580 $ 5,109,532 $ 846,080 $ 33,348 $ 15,403,540 At June 30, 2023 and December 31, 2022, reserves for unfunded loan commitments recorded in other liabilities were $3.1 million and $1.4 million, respectively. For the three and six months ended June 30, 2023, the Company recorded additions to reserves for unfunded commitments totaling $110 thousand and $1.7 million, respectively. For the three and six months ended June 30, 2022, the Company recorded additions to reserves for unfunded commitments totaling $180 thousand and $380 thousand, respectively. 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 amortized cost of nonaccrual loans, as well as loans past due 90 or more days and still on accrual status, by loan segment and broken out by loans with a recorded ACL and those without a recorded ACL, at June 30, 2023 and December 31, 2022. June 30, 2023 Nonaccrual with No ACL Nonaccrual with an ACL Total Nonaccrual (1) Accruing Loans Past Due 90 Days or More (Dollars in thousands) CRE loans $ 22,286 $ 6,984 $ 29,270 $ 14,737 C&I loans 1,212 21,830 23,042 362 Residential mortgage loans 4,420 4,163 8,583 — Consumer and other loans — 357 357 83 Total $ 27,918 $ 33,334 $ 61,252 $ 15,182 December 31, 2022 Nonaccrual with No ACL Nonaccrual with an ACL Total Nonaccrual (1) Accruing Loans Past Due 90 Days or More (Dollars in thousands) CRE loans $ 29,782 $ 4,133 $ 33,915 $ — C&I loans 1,618 4,002 5,620 336 Residential mortgage loans 5,959 3,816 9,775 — Consumer and other loans — 377 377 65 Total $ 37,359 $ 12,328 $ 49,687 $ 401 __________________________________ (1) Total nonaccrual loans exclude the guaranteed portion of SBA loans that are in liquidation totaling $11.9 million and $9.8 million, at June 30, 2023 and December 31, 2022, respectively. The following table presents the amortized cost of collateral-dependent loans at June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 Real Estate Collateral Other Collateral Total Real Estate Collateral Other Collateral Total (Dollars in thousands) CRE loans $ 25,635 $ — $ 25,635 $ 35,523 $ — $ 35,523 C&I loans 1,212 20,203 21,415 1,618 2,743 4,361 Residential mortgage loans 4,420 — 4,420 5,959 — 5,959 Total $ 31,267 $ 20,203 $ 51,470 $ 43,100 $ 2,743 $ 45,843 Collateral on loans is a significant portion of what secures collateral-dependent loans and significant changes to the fair value of the collateral can potentially impact ACL. During the six months ended June 30, 2023, the Company did not have any significant changes to the extent to which collateral secured its collateral-dependent loans, due to general deterioration or from other factors. Real estate collateral securing CRE and C&I consisted of commercial real estate properties including hotel/motel, building, office, gas station/carwash, and warehouse properties. Accrued interest receivable on loans totaled $50.6 million at June 30, 2023, and $47.3 million at December 31, 2022. With the adoption of CECL, the Company elected not to consider accrued interest receivable in its estimates of expected credit losses because the Company writes off uncollectible accrued interest receivable in a timely manner. The Company considers writing off accrued interest amounts once the amounts become 90 days past due to be considered within a timely manner. The Company has elected to write off accrued interest receivable by reversing interest income. The following table presents interest income reversals, due to loans being placed on nonaccrual status, by loan segment for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) CRE loans $ 214 $ 1,097 $ 665 $ 1,252 C&I loans 368 7 886 26 Residential mortgage loans 18 — 32 139 Total $ 600 $ 1,104 $ 1,583 $ 1,417 The following table presents the amortized cost of past due loans, including nonaccrual loans past due 30 or more days, by the number of days past due at June 30, 2023 and December 31, 2022, by loan segment: June 30, 2023 December 31, 2022 30-59 Days 60-89 Days 90 or More Days Total 30-59 Days 60-89 Days 90 or More Days Total (Dollars in thousands) CRE loans $ 7,497 $ 319 $ 21,063 $ 28,879 $ 2,292 $ 2,727 $ 5,694 $ 10,713 C&I loans 765 121 20,150 21,036 3,258 18 2,137 5,413 Residential mortgage loans 1,043 — 4,606 5,649 2,310 — 5,106 7,416 Consumer and other loans 148 57 83 288 617 44 308 969 Total Past Due $ 9,453 $ 497 $ 45,902 $ 55,852 $ 8,477 $ 2,789 $ 13,245 $ 24,511 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 segment, risk rating, and year of origination at June 30, 2023 and December 31, 2022. June 30, 2023 Term Loan by Origination Year Revolving Loans Total 2023 2022 2021 2020 2019 Prior (Dollars in thousands) CRE loans Pass $ 389,783 $ 2,450,867 $ 2,107,752 $ 1,281,552 $ 1,039,543 $ 1,693,896 $ 81,560 $ 9,044,953 Special mention — 2,772 22,388 4,145 22,789 19,165 10,997 82,256 Substandard — 824 8,370 1,001 2,884 51,872 — 64,951 Subtotal $ 389,783 $ 2,454,463 $ 2,138,510 $ 1,286,698 $ 1,065,216 $ 1,764,933 $ 92,557 $ 9,192,160 Year-to-date gross charge offs $ — $ 119 $ — $ 11 $ 34 $ 397 $ — $ 561 C&I loans Pass $ 807,771 $ 1,686,472 $ 885,837 $ 255,862 $ 219,210 $ 107,364 $ 654,007 $ 4,616,523 Special mention 38 19,212 54,415 9,854 173 — 44,858 128,550 Substandard 51 16,977 24,716 4,695 577 2,910 10,127 60,053 Subtotal $ 807,860 $ 1,722,661 $ 964,968 $ 270,411 $ 219,960 $ 110,274 $ 708,992 $ 4,805,126 Year-to-date gross charge offs $ — $ 89 $ 54 $ 45 $ 85 $ 465 $ — $ 738 Residential mortgage loans Pass $ 15,658 $ 373,241 $ 273,044 $ 1,374 $ 29,436 $ 132,782 $ — $ 825,535 Special mention — — — — — — — — Substandard — — 314 — 1,723 6,805 — 8,842 Subtotal $ 15,658 $ 373,241 $ 273,358 $ 1,374 $ 31,159 $ 139,587 $ — $ 834,377 Year-to-date gross charge offs $ — $ — $ — $ — $ — $ — $ — $ — Consumer and other loans Pass $ 3,565 $ 1,158 $ 332 $ 2,739 $ 165 $ 8,861 $ 15,970 $ 32,790 Special mention — — — — — — — — Substandard — — — — — 357 — 357 Subtotal $ 3,565 $ 1,158 $ 332 $ 2,739 $ 165 $ 9,218 $ 15,970 $ 33,147 Year-to-date gross charge offs $ — $ — $ — $ — $ — $ — $ 175 $ 175 Total loans Pass $ 1,216,777 $ 4,511,738 $ 3,266,965 $ 1,541,527 $ 1,288,354 $ 1,942,903 $ 751,537 $ 14,519,801 Special mention 38 21,984 76,803 13,999 22,962 19,165 55,855 210,806 Substandard 51 17,801 33,400 5,696 5,184 61,944 10,127 134,203 Total $ 1,216,866 $ 4,551,523 $ 3,377,168 $ 1,561,222 $ 1,316,500 $ 2,024,012 $ 817,519 $ 14,864,810 Total year-to-date gross charge offs $ — $ 208 $ 54 $ 56 $ 119 $ 862 $ 175 $ 1,474 December 31, 2022 Term Loan by Origination Year Revolving Loans Total 2022 2021 2020 2019 2018 Prior (Dollars in thousands) CRE loans Pass $ 2,421,631 $ 2,194,073 $ 1,372,027 $ 1,076,405 $ 1,018,553 $ 1,064,267 $ 105,274 $ 9,252,230 Special mention — 14,622 7,301 20,426 13,565 26,746 202 82,862 Substandard — 8,240 1,736 7,881 10,250 51,381 — 79,488 Subtotal $ 2,421,631 $ 2,216,935 $ 1,381,064 $ 1,104,712 $ 1,042,368 $ 1,142,394 $ 105,476 $ 9,414,580 C&I loans Pass $ 2,311,344 $ 1,090,034 $ 291,592 $ 298,133 $ 69,721 $ 95,531 $ 864,343 $ 5,020,698 Special mention 17,911 37,393 13,707 110 — 24 5,256 74,401 Substandard — 2,833 5,889 1,000 1,020 3,691 — 14,433 Subtotal $ 2,329,255 $ 1,130,260 $ 311,188 $ 299,243 $ 70,741 $ 99,246 $ 869,599 $ 5,109,532 Residential mortgage loans Pass $ 382,935 $ 283,163 $ 1,386 $ 30,603 $ 62,976 $ 75,242 $ — $ 836,305 Special mention — — — — — — — — Substandard — 311 — 967 384 8,113 — 9,775 Subtotal $ 382,935 $ 283,474 $ 1,386 $ 31,570 $ 63,360 $ 83,355 $ — $ 846,080 Consumer and other loans Pass $ 10,005 $ 723 $ 3,351 $ 223 $ 10 $ 1,420 $ 17,239 $ 32,971 Special mention — — — — — — — — Substandard — — — — — 377 — 377 Subtotal $ 10,005 $ 723 $ 3,351 $ 223 $ 10 $ 1,797 $ 17,239 $ 33,348 Total loans Pass $ 5,125,915 $ 3,567,993 $ 1,668,356 $ 1,405,364 $ 1,151,260 $ 1,236,460 $ 986,856 $ 15,142,204 Special mention 17,911 52,015 21,008 20,536 13,565 26,770 5,458 157,263 Substandard — 11,384 7,625 9,848 11,654 63,562 — 104,073 Total $ 5,143,826 $ 3,631,392 $ 1,696,989 $ 1,435,748 $ 1,176,479 $ 1,326,792 $ 992,314 $ 15,403,540 For the three and six months ended June 30, 2023 and the twelve months ended December 31, 2022, there were no revolving loans converted to term loans. 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 segment that were reclassified from held for investment to held for sale for the three and six months ended June 30, 2023 and 2022, is presented in the following table: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Transfer of loans held for investment to held for sale (Dollars in thousands) CRE loans $ 13,168 $ 57,835 $ 66,776 $ 155,486 C&I loans 61,608 9,867 170,483 16,769 Total $ 74,776 $ 67,702 $ 237,259 $ 172,255 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 differentiates its loan segments based on shared risk characteristics for which allowance for credit losses is measured on a collective basis. Risk Characteristics CRE loans Property type, location, owner-occupied status C&I loans Delinquency status, risk rating, industry type Residential mortgage loans FICO score, LTV, delinquency status, maturity date, collateral value, location Consumer and other loans Historical losses 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 the calculation of the allowance for credit losses for collectively assessed loans. The Company uses a reasonable and supportable period of two years, at which point loss assumptions revert back to historical loss information by means of one-year reversion period. Included in the quantitative portion of the ACL analysis are inputs such as borrowers’ net operating income, debt coverage ratios, real estate collateral values, as well as factors that are more subjective or require management’s judgment, including key macroeconomic variables from Moody’s forecast scenarios such as GDP, unemployment rates, interest rates, and CRE prices. These key inputs are utilized in the Company’s models to develop PD and LGD assumptions used in the calculation of estimated quantitative losses. The ACL for the Company’s construction, credit card, and certain consumer loans is calculated based on a non-modeled approach that utilizes 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 the aggregate, non-modeled loans represented less than 2% of the Company’s total loan portfolio at June 30, 2023. The Company’s Economic Forecast Committee (“EFC”) reviews 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. At June 30, 2023, the Company utilized the June 2023 Consensus economic forecast scenario from Moody’s, as it best aligned with management’s expectations of future conditions. The forecast projected GDP growth of 0.2% in 2023, 1.4% for 2024, and 2.1% for 2025, with unemployment projected to be 4.3% for 2023, 4.7% for 2024, and 4.3% in 2025. CRE prices in the Consensus scenario were expected to decrease, with the CRE price index declining to -5.2% for 2023 and -8.6% for 2024, then rebounding to +8.8% in 2025. The Company also utilized Moody’s December 2022 Consensus economic forecast for the calculation of the December 31, 2022 ACL. In order to 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, and other loan modifications; • Changes in the quality of the loan review system and the degree of oversight by the management and the Board of 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. For loans that do not share similar risk characteristics such as nonaccrual loans above $1.0 million, the Company evaluates these loans on an individual basis in accordance with ASC 326. Such nonaccrual loans are considered to have different risk profiles than performing loans and are therefore evaluated individually. The Company elected to collectively assess nonaccrual loans with balances below $1.0 million along with the performing and accrual loans, in order to reduce the operational burden of individually assessing small 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 an estimated funding rate to allocate an allowance to undrawn exposures. This funding rate is used as a credit conversion factor to capture how much undrawn lines of credit can potentially become drawn at any point. The funding rate is determined based on a look-back period of eight quarters. Credit loss is not estimated for off-balance-sheet credit exposures that are unconditionally cancellable by the Company. Loan Modifications to Borrowers Experiencing Financial Difficulty In January 2023, the Company adopted ASU 2022-02, Financial Instruments - Credit Losses (Topic 326): TDR and Vintage Disclosures (“ASU 2022-02”), which eliminated the accounting guidance for TDR while enhancing disclosure requirements for certain loan refinancing and restructurings by creditors when a borrower is experiencing financial difficulty. The Company applied this guidance on a modified retrospective transition method, which resulted in a positive cumulative effect adjustment to retained earnings of $287 thousand, net of tax. Subsequent to the adoption of ASU 2022-02, the new guidance is applied uniformly to the Company’s entire loan portfolio when estimating expected credit losses. For the three and six months ended June 30, 2023, there was only one C&I loan modification to a borrower experiencing financial difficulty, amounting to $26.0 million or 0.54% of total C&I loans. The loan modification type was a term extension of four months. For the three and six months ended June 30, 2023, the Company recorded an allowance for credit losses of $115 thousand for this modification. There were no loan modifications that subsequently defaulted during the period. Troubled Debt Restructurings At December 31, 2022, TDR loans totaled $41.1 million, consisting of $16.9 million in TDR loans on accrual status and $24.2 million in TDR loans on nonaccrual status. The Company recorded an allowance for credit losses totaling $2.8 million for TDR loans at December 31, 2022. At December 31, 2022, the Company had outstanding commitments to extend additional funds to these borrowers totaling $40 thousand. On January 1, 2023, the Company adopted ASU 2022-02, which eliminated the accounting guidance for TDR loans. The Company adopted ASU 2022-02 applying the amended requirements prospectively, except the recognition and measurement of existing TDRs, for which the Company elected the option to apply a modified retrospective transition method. Therefore, the Company did not have any TDR loans at June 30, 2023.

Leases

Leases	6 Months Ended
	Jun. 30, 2023
Leases [Abstract]
Leases	Leases The Company’s operating leases are real estate leases of bank branch locations, loan production offices, and office spaces with remaining lease terms ranging from 0 to 10 years at June 30, 2023. 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 June 30, 2023, ROU assets and related liabilities were $53.7 million and $58.0 million, respectively. At December 31, 2022, ROU assets and related liabilities were $55.0 million and $59.1 million, respectively. At June 30, 2023, the short term operating lease liability totaled $14.4 million and the long-term operating lease liability totaled $43.6 million. The Company defines short-term operating lease liabilities as liabilities due in twelve months or less, and long term lease liabilities are due in more than twelve months at the end of each reporting period. The Company did not have any finance leases at June 30, 2023 and December 31, 2022. During the six months ended June 30, 2023, the Company extended eight leases and there was one new lease contract. Lease extension terms ranged from two 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 operating lease cost: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Operating lease cost $ 3,825 $ 3,820 $ 7,666 $ 7,827 Short-term lease cost — — — — Variable lease cost 820 806 1,603 1,579 Sublease income (50) (105) (92) (208) Net lease cost $ 4,595 $ 4,521 $ 9,177 $ 9,198 Rent expense for the three and six months ended June 30, 2023, was $4.3 million and $9.2 million, respectively. Rent expense for the three and six months ended June 30, 2022, was $4.7 million and $9.3 million, respectively. During the three and six months ended June 30, 2023, the Company wrote off $0 and $93 thousand, respectively, in operating lease ROU assets resulting from the branch consolidation of one location. There was no impairment on operating ROU assets during the same periods of 2022. The table below summarizes other information related to the Company’s operating leases: At or for the Six Months Ended 2023 2022 (Dollars in thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash outflows for operating leases $ 8,013 $ 7,953 ROU assets obtained in exchange for lease liabilities, net 6,113 13,438 Weighted-average remaining lease term - operating leases 4.4 years 4.9 years Weighted-average discount rate - operating leases 2.68 % 2.30 % The table below summarizes the maturity of remaining lease liabilities: June 30, 2023 (Dollars in thousands) 2023 $ 7,866 2024 15,302 2025 13,542 2026 12,835 2027 7,319 2028 and thereafter 4,815 Total lease payments 61,679 Less: imputed interest 3,728 Total lease obligations $ 57,951 At June 30, 2023, the Company had one operating lease commitment that had not yet commenced, totaling $668 thousand in lease payments over a term of five years.

Deposits

Deposits	6 Months Ended
	Jun. 30, 2023
Deposits [Abstract]
Deposits	Deposits Total deposits of $15.62 billion at June 30, 2023, were down $119.4 million, or 0.8%, from $15.74 billion at December 31, 2022. The aggregate amount of time deposits in denominations of more than $250 thousand at June 30, 2023 and December 31, 2022, was $2.43 billion and $2.39 billion, respectively. Included in time deposits of more than $250 thousand was $300.0 million in California State Treasurer’s deposits at June 30, 2023 and December 31, 2022. 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 June 30, 2023 and December 31, 2022, securities with fair values of approximately $332.6 million and $348.0 million, respectively, were pledged as collateral for the California State Treasurer’s deposit. Brokered deposits at June 30, 2023 and December 31, 2022, totaled $2.28 billion and $1.18 billion, respectively. Brokered deposits at June 30, 2023, consisted of $70.0 million in money market and NOW accounts and $2.21 billion in time deposit accounts. Brokered deposits at December 31, 2022, consisted of $70.2 million in money market and NOW accounts and $1.11 billion in time deposit accounts. The year-to-date increase in brokered deposits reflected the recent banking industry disruption caused by multiple bank failures in the first half of 2023. The following is a breakdown of the Company’s deposits at June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 Balance Percentage (%) Balance Percentage (%) (Dollars in thousands) Noninterest bearing demand deposits $ 4,229,247 27 % $ 4,849,493 31 % Money market and NOW accounts 4,188,584 27 % 5,615,784 36 % Savings deposits 224,495 1 % 283,464 2 % Time deposits 6,977,026 45 % 4,990,060 31 % Total deposits $ 15,619,352 100 % $ 15,738,801 100 %

Borrowings

Borrowings	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Borrowings	Borrowings At June 30, 2023, borrowings totaled $2.26 billion, compared with $865.0 million at December 31, 2022. All of the Company’s borrowings at June 30, 2023 and December 31, 2022, had maturities of less than 12 months. The tables below summarize the Company’s borrowing lines at June 30, 2023 and December 31, 2022: June 30, 2023 Total Borrowings Outstanding Available Borrowing Capacity Amount Weighted Average Rate (Dollars in thousands) FHLB $ 4,598,689 $ 100,000 5.27 % $ 4,498,689 FRB Discount Window 805,300 460,000 5.25 % 345,300 FRB Bank Term Funding Program (“BTFP”) 1,709,056 1,700,000 4.47 % 9,056 Unsecured Federal Funds lines 417,680 — — % 417,680 Total $ 7,530,725 $ 2,260,000 4.66 % $ 5,270,725 December 31, 2022 Total Borrowings Outstanding Available Borrowing Capacity Amount Weighted Average Rate (Dollars in thousands) FHLB $ 4,583,277 $ 600,000 3.40 % $ 3,983,277 FRB Discount Window 670,058 265,000 4.50 % 405,058 Unsecured Federal Funds lines 451,180 — — % 451,180 Total $ 5,704,515 $ 865,000 3.74 % $ 4,839,515 The Company maintains a line of credit with the FHLB of San Francisco as a secondary source of funds. The borrowing capacity with the FHLB is limited to the lower of either 25% of the Bank’s total assets or the Bank’s collateral capacity. The terms of this credit facility require the Company to pledge eligible collateral with the FHLB equal to at least 100% of outstanding advances. At June 30, 2023 and December 31, 2022, loans with a carrying amount of $8.12 billion and $8.08 billion were pledged at the FHLB for outstanding advances and remaining borrowing capacity, respectively. At June 30, 2023 and December 31, 2022, 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 total asset size and outstanding borrowings. As a member of the FRB system, the Bank may also borrow from the FRB discount window. 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 June 30, 2023, the outstanding principal balance of the qualifying loans pledged at the FRB discount window was $732.4 million. There were also eighty-seven investment securities pledged at the discount window with a total fair value of $220.7 million. The Company availed itself of the BTFP, which was created in March 2023 to enhance banking system liquidity by allowing institutions to pledge certain securities at par value and borrow at a rate of ten basis points over the one-year overnight index swap rate. The BTFP is available to federally insured depository institutions in the U.S., with advances having a term of up to one year with no prepayment penalties. At June 30, 2023, the Company had a total par value of $1.71 billion in investment securities that were pledged under the BTFP. The Company also maintains unsecured federal funds borrowing lines with other banks. There were no borrowings outstanding from other banks at June 30, 2023 and December 31, 2022.

Subordinated Debentures and Con

Subordinated Debentures and Convertible Notes	6 Months Ended
	Jun. 30, 2023
Subordinated Borrowings [Abstract]
Subordinated Debentures and Convertible Notes	Convertible Notes and Subordinated Debentures 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 are not capital instruments but 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 represented 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. 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 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. On May 15, 2023, most of the Company’s holders of the convertible notes elected to exercise their optional put right and the Company paid off $197.1 million principal amount of notes in cash. In addition, during the three and six months ended June 30, 2023, the Company repurchased its notes in the aggregate principal amount of $9.2 million and $19.9 million, respectively, and recorded a gain on debt extinguishment of $169 thousand and $405 thousand, respectively. The repurchased notes were immediately cancelled subsequent to the repurchase. These repurchases are separate from the optional put and were made through a third-party broker. The value of the convertible notes at issuance and the carrying value at June 30, 2023 and December 31, 2022, are presented in the tables below: Capitalization Gross June 30, 2023 Total Capitalization Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 444 $ 444 Issuance costs to be capitalized 5 years — $ — — Carrying balance of convertible notes $ 444 $ — $ 444 Capitalization Gross December 31, 2022 Total Capitalization Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 217,500 $ 217,500 Issuance costs to be capitalized 5 years (4,119) $ 3,767 (352) Carrying balance of convertible notes $ 213,381 $ 3,767 $ 217,148 Interest expense on the convertible notes for the three and six months ended June 30, 2023, totaled $598 thousand and $1.9 million, respectively. Interest expense on the convertible notes for the three and six months ended June 30, 2022 totaled $1.3 million and $2.6 million, respectively.

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments As part of our overall interest rate risk management, the Company enters into derivative instruments, including interest rate swaps, collars, caps, floors, foreign exchange contracts, risk participation agreements and mortgage banking derivatives. The notional amount does not represent amounts exchanged by the parties. The amount exchanged is determined by reference to the notional amount and the other terms of the individual agreements. Derivative instruments are recognized on the balance sheet at their fair value and are not reported on a net basis. The tables below present the fair value of the Company’s derivative financial instruments at June 30, 2023 and December 31, 2022. The Company’s derivative assets and derivative liabilities are located within “Other assets” and “Other liabilities”, respectively, on the Company’s Consolidated Statements of Financial Condition. June 30, 2023 Notional Fair Value (1) Other Assets Other Liabilities (Dollars in thousands) Derivatives designated as cash flow hedges Interest rate swaps $ 925,000 $ — $ — Forward interest rate collars 500,000 — 4,812 Total $ 1,425,000 $ — $ 4,812 Derivatives not designated as hedges Interest rate contracts with correspondent banks $ 1,589,746 $ 70,165 $ 351 Interest rate contracts with customers 1,263,725 351 72,489 Foreign exchange contracts with correspondent banks 5,691 90 24 Foreign exchange contracts with customers 5,691 30 81 Risk participation agreement 132,117 — 28 Mortgage banking derivatives 3,750 25 4 Total $ 3,000,720 $ 70,661 $ 72,977 __________________________________ (1) The fair values of centrally-cleared derivative contracts are presented net of settled-to-market margin. December 31, 2022 Notional Fair Value Other Assets Other Liabilities (Dollars in thousands) Derivatives designated as cash flow hedges Interest rate swaps $ 614,000 $ 19,773 $ 1,227 Forward interest rate swaps 111,000 5,428 — Forward interest rate collars 500,000 182 828 Total $ 1,225,000 $ 25,383 $ 2,055 Derivatives not designated as hedges Interest rate contracts with correspondent banks $ 1,013,407 $ 73,059 $ 330 Interest rate contracts with customers 1,013,407 330 73,059 Foreign exchange contracts with correspondent banks 2,359 79 — Foreign exchange contracts with customers 2,359 — 73 Risk participation agreement 134,282 — 32 Mortgage banking derivatives 2,801 29 23 Total $ 2,168,615 $ 73,497 $ 73,517 Derivatives designated as cash flow hedges The Company had 19 interest rate contracts at June 30, 2023, with a total notional amount of $1.43 billion designated as cash flow hedges of liabilities tied to LIBOR and Federal Funds. The designated hedged interest rate swap agreements consisted of 17 non-forward starting interest rate swaps with a notional amount of $925.0 million and a weighted average term of 2.8 years, and two forward starting interest rate options with dealers (collars) with a notional amount of $500.0 million and an average weighted term of 3.5 years. The Company had 17 interest rate contracts at December 31, 2022, with a total notional amount of $1.23 billion designated as cash flow hedges of liabilities tied to LIBOR and Federal Funds. The designated hedged interest rate swap contracts consisted of 13 non-forward starting interest rate swaps with a notional amount of $614.0 million and a weighted average term of 4.1 years, two forward starting interest rate swaps with a notional amount of $111.0 million and a weighted average term of 3.9 years, and two forward starting interest rate options with dealers (collars) with a notional amount of $500.0 million and an average weighted term of 3.0 years. The Company’s interest rate contracts designated as cash flow hedges were determined to be fully effective during the periods presented. The aggregate fair value of the cash flow hedges are recorded in assets or liabilities with changes in fair value recorded in other comprehensive income. The gain or loss on derivatives is recorded in AOCI and is subsequently reclassified into interest income and interest expense in the period, during which the hedged forecasted transaction affects earnings. Amounts reported in AOCI related to interest rate agreements 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 hedges to remain fully effective throughout the remaining terms. The Company expects to reclassify approximately $16.8 million from AOCI as a decrease to interest expense during the next 12 months. For the three and six months ended June 30, 2023, the Company reclassified gains of $4.1 million and gains of $6.9 million, respectively, from accumulated other comprehensive income to interest expense. For the three and six months ended June 30, 2022, the Company reclassified losses of $114 thousand and $50 thousand, respectively, from accumulated other comprehensive income to interest expense. Derivatives not designated as hedges The Company’s derivatives not designated as hedges are not speculative and result from a service the Company provides to certain customers. 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 interest rate contracts are not designated as hedging instruments and are recorded at fair value in other assets and other liabilities. The change in fair value is recognized in the income statement as other income and fees. The Company is required to hold cash as collateral for the interest rate contracts that are not centrally cleared, which is recorded in other assets on the consolidated statement of financial condition. Total cash held as collateral for back-to-back interest rate contracts was $9.1 million at June 30, 2023, and $9.1 million at December 31, 2022. The Company offers foreign exchange contracts to customers to purchase and/or sell foreign currencies at set rates in the future. The foreign exchange contracts allow customers to hedge the foreign exchange rate risk of their deposits and loans denominated in foreign currencies. In conjunction with this, the Company also enters into offsetting back-to-back contracts with institutional counterparties to hedge our foreign exchange rate risk. These back-to-back contracts are intended to offset each other and allow us to offer our customers foreign exchange products. These foreign exchange contracts are not designated as hedging instruments and are recorded at fair value in other assets and other liabilities. During the three and six months ended June 30, 2023, the changes in fair value on foreign exchange contracts were losses of $3 thousand and $9 thousand, respectively, and were recognized in the income statement as other income and fees. During the three and six months ended June 30, 2022, the changes in fair value on foreign exchange contracts were $0 and $0, respectively. At June 30, 2023, the Company had risk participation agreements 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 June 30, 2023, the notional amount of the risk participation agreements sold was $132.1 million with a credit valuation adjustment of $28 thousand. At December 31, 2022, the notional amount of the risk participation agreements sold was $134.3 million with a credit valuation adjustment of $32 thousand. 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 June 30, 2023, the Company had approximately $3.8 million in interest rate lock commitments and total forward sales commitments for the future delivery of residential mortgage loans. At December 31, 2022, the Company had approximately $2.8 million in interest rate lock commitments and total forward sales commitments for the future delivery of residential mortgage loans.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The following table presents a summary of commitments described below as dates indicated below: June 30, 2023 December 31, 2022 (Dollars in thousands) Commitments to extend credit $ 2,761,027 $ 2,856,263 Standby letters of credit 124,060 132,538 Other letters of credit 52,674 22,376 Commitments to fund investments in affordable housing partnerships 9,322 11,792 The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its 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. The estimated exposure to loss from these commitments is included in the reserve for unfunded loan commitments, which amounted to $3.1 million at June 30, 2023, and $1.4 million at December 31, 2022. 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 $225 thousand at June 30, 2023, and $229 thousand at December 31, 2022. It is reasonably possible that the Company may incur losses in excess of 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	6 Months Ended
	Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Intangible Assets, and Servicing Assets	Goodwill, Intangible Assets, and Servicing Assets The carrying amount of the Company’s goodwill at June 30, 2023, and December 31, 2022, was $464.5 million. There was no impairment of goodwill recorded during the three and six months ended June 30, 2023. Goodwill and other intangible assets generated from business combinations and deemed to have indefinite lives are not subject to amortization and instead are tested for impairment annually at the reporting unit level unless a triggering event occurs thereby requiring an updated assessment. 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. Impairment exists when the carrying value of the goodwill exceeds the fair value of the reporting unit. In March 2023, the impact to banks triggered by the closure of well-known regional banks caused a significant decline in bank stock prices, including the Company’s stock price. These triggering events warranted the Company to perform an interim goodwill assessment as of June 30, 2023. Management estimated the fair value of the Company using the income approach based on the discounted free cash flows of the Company’ income projections and taking into consideration future economic forecasts available. Based on this quantitative assessment, the management has concluded that the goodwill was not impaired at June 30, 2023. Amortization expense related to core deposit intangible assets totaled $448 thousand and $896 thousand for the three and six months ended June 30, 2023, respectively. Amortization expense related to core deposit intangible assets totaled $486 thousand and $973 thousand for the three and six months ended June 30, 2022, respectively. The following table provides information regarding the core deposit intangibles at June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 Core Deposit Intangibles Related To: Amortization Period Gross Accumulated Carrying Amount Accumulated Carrying Amount (Dollars in thousands) Foster Bankshares acquisition 10 years $ 2,763 $ (2,716) $ 47 $ (2,668) $ 95 Wilshire Bancorp acquisition 10 years 18,138 (13,355) 4,783 (12,507) 5,631 Total $ 20,901 $ (16,071) $ 4,830 $ (15,175) $ 5,726 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. At June 30, 2023 and December 31, 2022, the Company did not have a valuation allowance on its servicing assets. The changes in servicing assets for the three and six months ended June 30, 2023 and 2022, were as follows: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Balance at beginning of period $ 11,628 $ 10,874 $ 11,628 $ 10,418 Additions through originations of servicing assets 884 1,427 1,849 2,890 Amortization (980) (1,086) (1,945) (2,093) Balance at end of period $ 11,532 $ 11,215 $ 11,532 $ 11,215 Loans serviced for others are not reported as assets. The principal balances of loans serviced for other institutions were $1.11 billion at June 30, 2023, and $1.10 billion at December 31, 2022. 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 June 30, 2023 and December 31, 2022, are presented below. June 30, 2023 December 31, 2022 SBA Servicing Assets: Weighted-average discount rate 10.46% 8.76% Constant prepayment rate 12.13% 12.09% Mortgage Servicing Assets: Weighted-average discount rate 11.63% 11.38% Constant prepayment rate 9.51% 9.61%

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three months ended June 30, 2023, the Company recorded an income tax provision of $13.4 million on pretax income of $51.5 million, representing an effective tax rate of 26.13%, compared with an income tax provision of $18.6 million on pretax income of $70.7 million, representing an effective tax rate of 26.35% for the three months ended June 30, 2022. For the six months ended June 30, 2023, the Company recorded an income tax provision totaling $27.1 million on pretax income of $104.3 million, representing an effective tax rate of 26.02%, compared with an income tax provision of $39.9 million on pretax income of $152.7 million, representing an effective tax rate of 26.12% for the six months ended June 30, 2022. The Company and its subsidiaries are subject to U.S. federal income tax, as well as state income taxes. The Company had total unrecognized tax benefits of $1.8 million at June 30, 2023 and $3.0 million at December 31, 2022, that relate to uncertainties associated with state income tax matters. Management believes it is reasonably possible that the unrecognized tax benefits may decrease by $1.2 million in the next twelve months due to a settlement with the state tax authorities. 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.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2023
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: Investment Securities The fair values of investment securities available for sale and held to maturity 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 value of the Company’s Level 3 security available for sale was 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 Contracts The Company offers interest rate contracts 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 contract with the customer. The Company also enters into an offsetting interest rate contract 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. The fair value assets and liabilities of centrally cleared interest rate contracts are net of variation margin settled-to-market. Due to the observable nature of the inputs used in deriving the fair value of these derivative contracts, the valuation of interest rate contracts 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 contracts designated as cash flow hedges, foreign exchange contracts 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, foreign exchange rates and, when appropriate, the current credit worthiness of the counterparties. Fair value assets and liabilities of centrally cleared derivatives are net of variation margin settled-to-market. Interest rate contracts designated as cash flow hedges and foreign exchange contracts are classified within Level 2 due to the observable nature of the inputs used in deriving the fair value of these contracts. 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 C&I 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. If Level 2 inputs are not available, carrying values 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 June 30, 2023 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Investment securities available for sale: U.S. Treasury securities $ 3,904 $ 3,904 $ — $ — U.S. Government agency and U.S. Government sponsored enterprises: Agency securities 3,837 — 3,837 — Collateralized mortgage obligations 751,740 — 751,740 — Mortgage-backed securities: Residential 435,148 — 435,148 — Commercial 352,851 — 352,851 — Asset-backed securities 149,742 — 149,742 — Corporate securities 18,572 — 18,572 — Municipal securities 200,792 — 199,862 930 Equity investments with readily determinable fair value 4,303 4,303 — — Interest rate contracts 70,516 — 70,516 — Mortgage banking derivatives 25 — 25 — Other derivatives 120 — 120 — Liabilities: Interest rate contracts 72,840 — 72,840 — Mortgage banking derivatives 4 — 4 — Other derivatives 4,945 — 4,917 28 Fair Value Measurements at the End of December 31, 2022 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Investment securities available for sale: U.S. Treasury securities $ 3,886 $ 3,886 $ — $ — U.S. Government agency and U.S. Government sponsored enterprises: Agency securities 3,867 — 3,867 — Collateralized mortgage obligations 793,699 — 793,699 — Mortgage-backed securities: Residential 453,177 — 453,177 — Commercial 368,287 — 368,287 — Asset-backed securities 147,604 — 147,604 — Corporate securities 18,857 — 18,857 — Municipal securities 182,752 — 181,809 943 Equity investments with readily determinable fair value 4,303 4,303 — — Interest rate contracts 73,389 — 73,389 — Mortgage banking derivatives 29 — 29 — Other derivatives 25,462 — 25,462 — Liabilities: Interest rate contracts 73,389 — 73,389 — Mortgage banking derivatives 23 — 23 — Other derivatives 2,160 — 2,128 32 There were no transfers between Levels 1, 2, and 3 during the three and six months ended June 30, 2023 and 2022. The table below presents a reconciliation and income statement classification of gains (losses) for the municipal security and risk participation agreements measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Municipal securities: Beginning Balance $ 982 $ 1,029 $ 943 $ 1,038 Change in fair value included in other comprehensive income (52) (10) (13) (19) Ending Balance $ 930 $ 1,019 $ 930 $ 1,019 Risk participation agreements: Beginning Balance $ 35 $ 61 $ 32 $ 93 Change in fair value included in income (expense) (7) (30) (4) (62) Ending Balance $ 28 $ 31 $ 28 $ 31 The Company measures certain assets at fair value on a non-recurring basis including collateral-dependent loans, 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 June 30, 2023 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Collateral-dependent loans receivable at fair value: CRE loans $ 4,285 $ — $ — $ 4,285 C&I loans 21,195 — — 21,195 Loans held for sale, net 46,042 — 46,042 — Fair Value Measurements at the End of December 31, 2022 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Collateral-dependent loans receivable at fair value: CRE loans $ 807 $ — $ — $ 807 C&I loans 2,744 — — 2,744 Loans held for sale, net 48,795 — 48,795 — OREO 1,050 — — 1,050 For assets measured at fair value on a non-recurring basis, the total net losses, which include charge offs, recoveries, recorded ACL, valuations, and recognized gains and losses on sales are summarized below: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Assets: Collateral-dependent loans receivable at fair value: CRE loans $ (642) $ (763) $ (762) $ (1,374) C&I loans (11,472) (2,026) (11,861) (2,026) Loans held for sale, net — (371) — (988) OREO — — (271) (256) Fair Value of Financial Instruments Carrying amounts and estimated fair values of financial instruments, not previously presented, at June 30, 2023 and December 31, 2022, were as follows: June 30, 2023 Carrying Amount Estimated Fair Value Fair Value Measurement (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 2,302,339 $ 2,302,339 Level 1 Investment securities HTM 269,760 255,344 Level 2 Equity investments without readily determinable fair values 38,660 38,660 Level 2 Loans held for sale 49,246 49,285 Level 2 Loans receivable, net 14,691,814 14,164,650 Level 3 Accrued interest receivable 60,118 60,118 Level 2/3 Servicing assets, net 11,532 16,814 Level 3 Customers’ liabilities on acceptances 659 659 Level 2 Financial Liabilities: Noninterest bearing deposits $ 4,229,247 $ 4,229,247 Level 2 Savings and other interest bearing demand deposits 4,413,079 4,413,079 Level 2 Time deposits 6,977,026 7,007,072 Level 2 FHLB and FRB borrowings 2,260,000 2,253,222 Level 2 Convertible notes 444 441 Level 1 Subordinated debentures 107,188 104,804 Level 2 Accrued interest payable 109,236 109,236 Level 2 Acceptances outstanding 659 659 Level 2 December 31, 2022 Carrying Amount Estimated Fair Value Fair Value Measurement (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 506,776 $ 506,776 Level 1 Interest earning deposits in other financial institutions 735 733 Level 2 Investment securities HTM 271,066 258,407 Level 2 Equity investments without readily determinable fair values 38,093 38,093 Level 2 Loans held for sale 49,245 49,248 Level 2 Loans receivable, net 15,241,181 14,745,881 Level 3 Accrued interest receivable 55,460 55,460 Level 2/3 Servicing assets, net 11,628 17,375 Level 3 Customers’ liabilities on acceptances 818 818 Level 2 Financial Liabilities: Noninterest bearing deposits $ 4,849,493 $ 4,849,493 Level 2 Savings and other interest bearing demand deposits 5,899,248 5,899,248 Level 2 Time deposits 4,990,060 5,020,093 Level 2 FHLB and FRB borrowings 865,000 867,088 Level 2 Convertible notes, net 217,148 213,937 Level 1 Subordinated debentures 106,565 107,944 Level 2 Accrued interest payable 26,668 26,668 Level 2 Acceptances outstanding 818 818 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 was the estimated fair value for cash and cash equivalents, savings and other interest bearing demand deposits, equity investments without readily determinable fair values, customers’ 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 was determined through a discounted cash flow analysis, which incorporates probability of default and loss given default rates on an individual loan basis. For fixed rate loans, the discount rate used in a discounted cash flow analysis was based on the LIBOR Swap Rate. For variable loans, the discount rate started with the underlying 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. Fair values of residential real estate loans included Fannie Mae and Freddie Mac prepayment speed assumptions or a third-party index based on historical prepayment speeds. Fair value of time deposits was based on discounted cash flow analyses using recent issuance rates over the prior three months and a market rate analysis of recent offering rates for retail products. Wholesale time deposit fair values incorporated brokered time deposit offering rates. The fair value of the Company’s debt was based on current rates for similar financing. Fair value for the Company’s convertible notes was 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 was not presented herein, as the fair value of these financial instruments was not material to the consolidated financial statements.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2023
Equity [Abstract]
Stockholders’ Equity	Stockholders’ Equity Total stockholders’ equity at June 30, 2023, was $2.07 billion, compared with $2.02 billion at December 31, 2022. In January 2022, 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, of which an estimated $35.3 million remained available at June 30, 2023. During the six months ended June 30, 2023, the Company did not repurchase any shares of common stock as part of this program (see Part II, Item 2—“Unregistered Sales of Equity Securities and Use of Proceeds” for additional information). For the three months ended June 30, 2023 and 2022, the Company paid cash dividends of $0.14 per common share. For the six months ended June 30, 2023 and 2022, the Company paid dividends of $0.28 per common share. The following table presents the changes to accumulated other comprehensive income for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Balance at beginning of period $ (214,257) $ (108,165) $ (230,857) $ (11,412) Unrealized net (losses) gains on securities available for sale (31,071) (55,658) 144 (196,931) Unrealized net losses on securities available for sale transferred to held to maturity — (36,576) — (36,576) Unrealized net gains on interest rate contracts used for cash flow hedge 13,653 2,006 7,715 6,008 Reclassification adjustments for net (gains) losses realized in net income (3,322) (38) (5,060) 26 Tax effect 6,113 26,724 (826) 67,178 Other comprehensive (loss) income, net of tax (14,627) (63,542) 1,973 (160,295) Balance at end of period $ (228,884) $ (171,707) $ (228,884) $ (171,707) Reclassifications for net gains and losses realized in net income for the three and six months ended June 30, 2023 and 2022, related to net gains on interest rate contracts designated as cash flow hedges and amortization on unrealized loss from transferred investment securities to HTM. Gains and losses on interest rate contracts are recorded in interest expense in the Consolidated Statements of Income. The unrealized holding loss at the date of transfer on securities HTM will continue to be reported, net of taxes, in accumulated other comprehensive income (“AOCI”) as a component of stockholders’ equity and be amortized over the remaining life of the securities as an adjustment of yield, offsetting the impact on yield of the corresponding discount amortization. For the three and six months ended June 30, 2023, the Company recorded reclassification adjustments of $4.1 million and $6.9 million, respectively, from other comprehensive income to interest expense. For the three and six months ended June 30, 2022, the Company recorded reclassification adjustments of $114 thousand and $50 thousand, respectively, from other comprehensive income to interest expense. For the three and six months ended June 30, 2023, the Company recorded reclassification adjustments of $806 thousand and $1.8 million, respectively, from other comprehensive income to a reduction of interest income to amortize transferred unrealized losses to investment securities HTM, compared with $76 thousand for the three and six months ended June 30, 2022, respectively.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation In 2019, the Company’s stockholders approved the 2019 stock-based incentive plan (the “2019 Plan”), which provides for grants of stock options, stock appreciation rights (“SAR”), restricted stock, performance shares, and performance units to non-employee directors and employees 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 provides the Company flexibility to (i) attract and retain qualified non-employee directors, executives, and other key employees with appropriate equity-based awards; (ii) motivate high levels of performance; (iii) recognize employees’ 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. At June 30, 2023, there were no remaining shares available for future grants under the plan, however, the pool of available shares could be partially replenished for future grants to the extent there are forfeitures, expirations or otherwise terminations of existing equity awards without issuance of the shares underlying such awards. 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 With the exception of the shares that are 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 six months ended June 30, 2023: Number of Shares Weighted-Average Exercise Price Per Share Weighted-Average Aggregate Intrinsic Value (Dollars in thousands) Outstanding - January 1, 2023 649,367 $ 16.63 Granted — — Exercised — — Expired (20,000) 17.18 Forfeited — — Outstanding - June 30, 2023 629,367 $ 16.61 2.40 $ — Options exercisable - June 30, 2023 629,367 $ 16.61 2.40 $ — The following is a summary of the Company’s restricted stock and performance unit activity for the six months ended June 30, 2023: Number of Shares Weighted-Average Grant Date Fair Value Outstanding (unvested) - January 1, 2023 1,760,373 $ 13.89 Granted 1,504,513 10.10 Vested (811,347) 12.41 Forfeited (126,041) 10.99 Outstanding (unvested) - June 30, 2023 2,327,498 $ 12.11 The total fair value of restricted stock and performance units vested during the six months ended June 30, 2023 and 2022, was $8.0 million and $9.4 million, respectively. In July 2022, the Company discontinued the Hope Employee Stock Purchase Plan (“ESPP”), which allowed 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 used 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 was considered compensatory under GAAP and compensation expense for the ESPP is recognized as part of the Company’s stock-based compensation expense. No compensation expense was incurred for the ESPP during the three and six months ended June 30, 2023, due to the plan’s discontinuation. The compensation expense for the ESPP during the three and six months ended June 30, 2022, was $34 thousand and $234 thousand, respectively. The total amounts charged against income related to stock-based payment arrangements, including the ESPP, were $3.4 million and $5.7 million for the three and six months ended June 30, 2023, respectively. For the three and six months ended June 30, 2022, $3.5 million and $6.1 million, respectively, of stock-based payment arrangements were charged against income. The income tax benefit recognized was approximately $884 thousand and $1.5 million for the three and six months ended June 30, 2023, respectively, compared with $912 thousand and $1.6 million for the three and six months ended June 30, 2022, respectively. Since all stock option grants were vested at June 30, 2023, there was no unrecognized compensation expense related to non-vested stock option grants. Unrecognized compensation expense related to non-vested restricted stock and performance units was $20.7 million, and is expected to be recognized over a weighted average vesting period of 1.91 years.

Regulatory Matters

Regulatory Matters	6 Months Ended
	Jun. 30, 2023
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. At June 30, 2023, 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. On January 1, 2020, the Company adopted ASU 2016-13 and implemented the CECL methodology. In response to the COVID-19 pandemic, federal regulatory agencies published a final rule that provides the option to delay the cumulative effect of the day 1 impact of CECL adoption on regulatory capital, along with 25% of the change in the adjusted allowance for credit losses (as computed for regulatory capital purposes, which excludes purchased credit deteriorated (“PCD”) loans), for two years, followed by a three-year phase-in period. The Company has elected the five-year transition period consistent with the final rule issued by the federal regulatory agencies. At June 30, 2023 and December 31, 2022, 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 a minimum total capital ratio, Tier 1 capital ratio, common equity Tier 1 capital ratio, and leverage ratio 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 and include the effects of the Company’s election to utilize the five-year transition described above: Actual Ratio Required for Capital Adequacy Purposes Ratio Required To Be Well-Capitalized Ratio Required for Minimum Capital Adequacy With Capital Conservation Buffer June 30, 2023 Amount Ratio (Dollars in thousands) Common equity Tier 1 capital Company $ 1,839,586 11.05 % 4.50 % N/A 7.00 % Bank $ 1,905,339 11.46 % 4.50 % 6.50 % 7.00 % Total capital Company $ 2,102,625 12.64 % 8.00 % N/A 10.50 % Bank $ 2,065,091 12.42 % 8.00 % 10.00 % 10.50 % Tier 1 capital Company $ 1,942,873 11.68 % 6.00 % N/A 8.50 % Bank $ 1,905,339 11.46 % 6.00 % 8.00 % 8.50 % Leverage capital Company $ 1,942,873 9.57 % 4.00 % N/A N/A Bank $ 1,905,339 9.39 % 4.00 % 5.00 % N/A Actual Ratio Required for Capital Adequacy Purposes Ratio Required To Be Well-Capitalized Ratio Required for Minimum Capital Adequacy With Capital Conservation Buffer December 31, 2022 Amount Ratio (Dollars in thousands) Common equity Tier 1 capital Company $ 1,799,020 10.55 % 4.50 % N/A 7.00 % Bank $ 2,049,973 12.03 % 4.50 % 6.50 % 7.00 % Total capital Company $ 2,041,319 11.97 % 8.00 % N/A 10.50 % Bank $ 2,189,607 12.85 % 8.00 % 10.00 % 10.50 % Tier 1 capital Company $ 1,901,685 11.15 % 6.00 % N/A 8.50 % Bank $ 2,049,973 12.03 % 6.00 % 8.00 % 8.50 % Leverage capital Company $ 1,901,685 10.15 % 4.00 % N/A N/A Bank $ 2,049,973 10.94 % 4.00 % 5.00 % N/A

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2023
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 June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Noninterest bearing deposit account income: Monthly service charges $ 241 $ 249 $ 486 $ 501 Customer analysis charges 1,259 1,183 2,385 2,115 NSF charges 711 731 1,446 1,400 Other service charges 89 84 180 181 Total noninterest bearing deposit account income 2,300 2,247 4,497 4,197 Interest bearing deposit account income: Monthly service charges 25 23 49 47 Total service fees on deposit accounts $ 2,325 $ 2,270 $ 4,546 $ 4,244 Wire transfer fee income: Wire transfer fees $ 733 $ 770 $ 1,386 $ 1,489 Foreign exchange fees 117 88 237 269 Total wire transfer fees $ 850 $ 858 $ 1,623 $ 1,758

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Pay vs Performance Disclosure
Basic EPS - common stock	$ 38,022	$ 52,088	$ 77,143	$ 112,826

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2023
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 June 30, 2023 and December 31, 2022, and the results of operations for the three and six months ended June 30, 2023 and 2022. 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	Recently Issued Accounting Pronouncements Not Yet Adopted In March 2023, the FASB issued ASU 2023-02, Investments Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method. These amendments allow reporting entities to elect to account for qualifying tax equity investments using the proportional amortization method, regardless of the program giving rise to the related income tax credits. This guidance is effective for public business entities for fiscal years including interim periods within those fiscal years, beginning after December 15, 2023. Early adoption is permitted in any interim period. ASU 2023-02 is not expected to have a material impact on the Company’s consolidated financial statements.
Financing Receivables	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 differentiates its loan segments based on shared risk characteristics for which allowance for credit losses is measured on a collective basis. Risk Characteristics CRE loans Property type, location, owner-occupied status C&I loans Delinquency status, risk rating, industry type Residential mortgage loans FICO score, LTV, delinquency status, maturity date, collateral value, location Consumer and other loans Historical losses 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 the calculation of the allowance for credit losses for collectively assessed loans. The Company uses a reasonable and supportable period of two years, at which point loss assumptions revert back to historical loss information by means of one-year reversion period. Included in the quantitative portion of the ACL analysis are inputs such as borrowers’ net operating income, debt coverage ratios, real estate collateral values, as well as factors that are more subjective or require management’s judgment, including key macroeconomic variables from Moody’s forecast scenarios such as GDP, unemployment rates, interest rates, and CRE prices. These key inputs are utilized in the Company’s models to develop PD and LGD assumptions used in the calculation of estimated quantitative losses. The ACL for the Company’s construction, credit card, and certain consumer loans is calculated based on a non-modeled approach that utilizes 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 the aggregate, non-modeled loans represented less than 2% of the Company’s total loan portfolio at June 30, 2023. The Company’s Economic Forecast Committee (“EFC”) reviews 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. At June 30, 2023, the Company utilized the June 2023 Consensus economic forecast scenario from Moody’s, as it best aligned with management’s expectations of future conditions. The forecast projected GDP growth of 0.2% in 2023, 1.4% for 2024, and 2.1% for 2025, with unemployment projected to be 4.3% for 2023, 4.7% for 2024, and 4.3% in 2025. CRE prices in the Consensus scenario were expected to decrease, with the CRE price index declining to -5.2% for 2023 and -8.6% for 2024, then rebounding to +8.8% in 2025. The Company also utilized Moody’s December 2022 Consensus economic forecast for the calculation of the December 31, 2022 ACL. In order to 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, and other loan modifications; • Changes in the quality of the loan review system and the degree of oversight by the management and the Board of 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. For loans that do not share similar risk characteristics such as nonaccrual loans above $1.0 million, the Company evaluates these loans on an individual basis in accordance with ASC 326. Such nonaccrual loans are considered to have different risk profiles than performing loans and are therefore evaluated individually. The Company elected to collectively assess nonaccrual loans with balances below $1.0 million along with the performing and accrual loans, in order to reduce the operational burden of individually assessing small 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 an estimated funding rate to allocate an allowance to undrawn exposures. This funding rate is used as a credit conversion factor to capture how much undrawn lines of credit can potentially become drawn at any point. The funding rate is determined based on a look-back period of eight 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)	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Computation of basic and diluted EPS	The following tables present computations of basic and diluted EPS for the three and six months ended June 30, 2023 and 2022. Three Months Ended June 30, 2023 2022 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 $ 38,022 119,953,174 $ 0.32 $ 52,088 120,219,919 $ 0.43 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 176,185 479,719 Diluted EPS - common stock $ 38,022 120,129,359 $ 0.32 $ 52,088 120,699,638 $ 0.43 Six Months Ended June 30, 2023 2022 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 $ 77,143 119,753,321 $ 0.64 $ 112,826 120,175,894 $ 0.94 Effect of dilutive securities: Stock options, restricted stock, and ESPP shares 426,122 722,711 Diluted EPS - common stock $ 77,143 120,179,443 $ 0.64 $ 112,826 120,898,605 $ 0.93

Equity Investments (Tables)

Equity Investments (Tables)	6 Months Ended
	Jun. 30, 2023
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 six months ended June 30, 2023 and 2022, were recorded in other noninterest income and fees as summarized in the table below: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Net change in fair value recorded during the period on equity investments with readily determinable fair value $ (69) $ (865) $ — $ (2,112) Less: 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 held at the end of the period $ (69) $ (865) $ — $ (2,112)

Securities Available for Sale (

Securities Available for Sale (Tables)	6 Months Ended
	Jun. 30, 2023
Debt Securities, Available-for-Sale [Abstract]
Summary of Securities Available for Sale	The following is a summary of investment securities as of the dates indicated: June 30, 2023 December 31, 2022 Amortized Gross Gross Fair Amortized Gross Gross Fair (Dollars in thousands) Debt securities available for sale: U.S. Treasury securities $ 3,994 $ — $ (90) $ 3,904 $ 3,990 $ — $ (104) $ 3,886 U.S. Government agency and U.S. Government sponsored enterprises: Agency securities 4,000 — (163) 3,837 4,000 — (133) 3,867 Collateralized mortgage obligations 904,848 — (153,108) 751,740 947,541 — (153,842) 793,699 Mortgage-backed securities: Residential 522,145 — (86,997) 435,148 544,084 — (90,907) 453,177 Commercial 407,972 — (55,121) 352,851 417,241 — (48,954) 368,287 Asset-backed securities 153,536 — (3,794) 149,742 153,539 — (5,935) 147,604 Corporate securities 23,326 — (4,754) 18,572 23,351 — (4,494) 18,857 Municipal securities 213,913 1,082 (14,203) 200,792 195,675 790 (13,713) 182,752 Total investment securities available for sale $ 2,233,734 $ 1,082 $ (318,230) $ 1,916,586 $ 2,289,421 $ 790 $ (318,082) $ 1,972,129 Debt securities held to maturity: U.S. Government agency and U.S. Government sponsored enterprises: Mortgage-backed securities: Residential $ 154,963 $ — $ (6,919) $ 148,044 $ 157,881 $ — $ (7,041) $ 150,840 Commercial 114,797 — (7,497) 107,300 113,185 1 (5,619) 107,567 Total investment securities held to maturity $ 269,760 $ — $ (14,416) $ 255,344 $ 271,066 $ 1 $ (12,660) $ 258,407
Interest Income	The following table presents a breakdown of interest income recorded for investment securities that are taxable and nontaxable. Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Interest income on investment securities Taxable $ 14,466 $ 11,997 $ 28,512 $ 23,397 Nontaxable 1,068 311 2,147 567 Total $ 15,534 $ 12,308 $ 30,659 $ 23,964
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of investment securities at June 30, 2023, by contractual maturity, are presented in the table below. Collateralized mortgage obligations, mortgage-backed securities, and asset-backed securities are presented by final maturity. 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. Available for Sale Held to Maturity Amortized Estimated Amortized Estimated (Dollars in thousands) Debt securities: Due within one year $ 4,984 $ 4,885 $ — $ — Due after one year through five years 147,521 136,859 26,641 25,589 Due after five years through ten years 108,760 97,284 8,546 8,120 Due after ten years 1,972,469 1,677,558 234,573 221,635 Total $ 2,233,734 $ 1,916,586 $ 269,760 $ 255,344
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. The length of time that the individual securities have been in a continuous unrealized loss position is not a factor in determining credit impairment with the adoption of current expected credit losses (“CECL”). June 30, 2023 Less than 12 months 12 months or longer Total Description of Number Fair Gross Number Fair Gross Number Fair Gross (Dollars in thousands) U.S. Treasury securities — $ — $ — 1 $ 3,904 $ (90) 1 $ 3,904 $ (90) U.S. Government agency and U.S. Government sponsored enterprises: Agency securities — — — 1 3,837 (163) 1 3,837 (163) Collateralized mortgage obligations 6 14,563 (1,078) 112 737,177 (152,030) 118 751,740 (153,108) Mortgage-backed securities: Residential 2 5,062 (266) 63 430,086 (86,731) 65 435,148 (86,997) Commercial 8 48,910 (2,633) 48 303,941 (52,488) 56 352,851 (55,121) Asset-backed securities — — — 18 149,742 (3,794) 18 149,742 (3,794) Corporate securities — — — 6 18,572 (4,754) 6 18,572 (4,754) Municipal securities 29 73,327 (1,148) 38 82,766 (13,055) 67 156,093 (14,203) Total 45 $ 141,862 $ (5,125) 287 $ 1,730,025 $ (313,105) 332 $ 1,871,887 $ (318,230) December 31, 2022 Less than 12 months 12 months or longer Total Description of Number Fair Gross Number Fair Gross Number Fair Gross (Dollars in thousands) U.S. Treasury securities 1 $ 3,886 $ (104) — $ — $ — 1 $ 3,886 $ (104) U.S. Government agency and U.S. Government sponsored enterprises: Agency securities 1 3,867 (133) — — — 1 3,867 (133) Collateralized mortgage obligations 61 150,419 (14,888) 59 643,280 (138,954) 120 793,699 (153,842) Mortgage-backed securities: Residential 23 55,645 (5,616) 42 397,532 (85,291) 65 453,177 (90,907) Commercial 29 172,963 (12,156) 26 195,324 (36,798) 55 368,287 (48,954) Asset-backed securities 3 21,836 (716) 15 125,768 (5,219) 18 147,604 (5,935) Corporate securities 1 3,401 (600) 5 15,456 (3,894) 6 18,857 (4,494) Municipal securities 31 76,942 (3,207) 32 65,730 (10,506) 63 142,672 (13,713) Total 150 $ 488,959 $ (37,420) 179 $ 1,443,090 $ (280,662) 329 $ 1,932,049 $ (318,082)

Loans Receivable and Allowanc_2

Loans Receivable and Allowance for Credit Losses (Tables)	6 Months Ended
	Jun. 30, 2023
Receivables [Abstract]
Summary of Loans Receivable by Major Category	The following is a summary of loans receivable by segment: June 30, 2023 December 31, 2022 (Dollars in thousands) Loan portfolio composition Commercial real estate (“CRE”) loans $ 9,192,160 $ 9,414,580 Commercial and industrial (“C&I”) loans 4,805,126 5,109,532 Residential mortgage loans 834,377 846,080 Consumer and other loans 33,147 33,348 Total loans receivable, net of deferred costs and fees 14,864,810 15,403,540 Allowance for credit losses (172,996) (162,359) Loans receivable, net of allowance for credit losses $ 14,691,814 $ 15,241,181
Allowance for Credit Losses by Portfolio Segment	The tables below detail the activity in the allowance for credit losses (“ACL”) by portfolio segment for the three and six months ended June 30, 2023 and 2022. CRE Loans C&I Loans Residential Mortgage Loans Consumer and Other Loans Total (Dollars in thousands) Three Months Ended June 30, 2023 Balance, beginning of period $ 108,835 $ 42,790 $ 11,253 $ 666 $ 163,544 Provision (credit) for credit losses (3,076) 11,013 730 233 8,900 Loans charged off (561) (298) — (120) (979) Recoveries of charge offs 123 1,389 — 19 1,531 Balance, end of period $ 105,321 $ 54,894 $ 11,983 $ 798 $ 172,996 Six Months Ended June 30, 2023 Balance, beginning of period $ 95,884 $ 56,872 $ 8,920 $ 683 $ 162,359 ASU 2022-02 day 1 adoption adjustment 19 (426) — — (407) Provision (credit) for credit losses 9,787 (2,487) 3,063 237 10,600 Loans charged off (561) (738) — (175) (1,474) Recoveries of charge offs 192 1,673 — 53 1,918 Balance, end of period $ 105,321 $ 54,894 $ 11,983 $ 798 $ 172,996 CRE Loans C&I Loans Residential Mortgage Loans Consumer and Other Loans Total (Dollars in thousands) Three Months Ended June 30, 2022 Balance, beginning of period $ 106,545 $ 35,676 $ 4,262 $ 967 $ 147,450 Provision (credit) for credit losses (7,229) 8,715 1,817 (103) 3,200 Loans charged off (476) (172) — (64) (712) Recoveries of charge offs 984 633 — 25 1,642 Balance, end of period $ 99,824 $ 44,852 $ 6,079 $ 825 $ 151,580 Six Months Ended June 30, 2022 Balance, beginning of period $ 108,440 $ 27,811 $ 3,316 $ 983 $ 140,550 Provision (credit) for credit losses (25,542) 15,051 2,763 (72) (7,800) Loans charged off (1,751) (349) — (115) (2,215) Recoveries of charge offs 18,677 2,339 — 29 21,045 Balance, end of period $ 99,824 $ 44,852 $ 6,079 $ 825 $ 151,580 The following tables break out the allowance for credit losses and loan balance by measurement methodology at June 30, 2023 and December 31, 2022: June 30, 2023 CRE Loans C&I Loans Residential Mortgage Loans Consumer and Other Loans Total (Dollars in thousands) Allowance for credit losses: Individually evaluated $ 1,150 $ 11,706 $ 245 $ 72 $ 13,173 Collectively evaluated 104,171 43,188 11,738 726 159,823 Total $ 105,321 $ 54,894 $ 11,983 $ 798 $ 172,996 Loans outstanding: Individually evaluated $ 29,096 $ 23,042 $ 8,583 $ 180 $ 60,901 Collectively evaluated 9,163,064 4,782,084 825,794 32,967 14,803,909 Total $ 9,192,160 $ 4,805,126 $ 834,377 $ 33,147 $ 14,864,810 December 31, 2022 CRE Loans C&I Loans Residential Mortgage Loans Consumer and Other Loans Total (Dollars in thousands) Allowance for credit losses: Individually evaluated $ 870 $ 2,941 $ 24 $ 21 $ 3,856 Collectively evaluated 95,014 53,931 8,896 662 158,503 Total $ 95,884 $ 56,872 $ 8,920 $ 683 $ 162,359 Loans outstanding: Individually evaluated $ 43,461 $ 12,477 $ 9,775 $ 436 $ 66,149 Collectively evaluated 9,371,119 5,097,055 836,305 32,912 15,337,391 Total $ 9,414,580 $ 5,109,532 $ 846,080 $ 33,348 $ 15,403,540 Loan Modifications to Borrowers Experiencing Financial Difficulty In January 2023, the Company adopted ASU 2022-02, Financial Instruments - Credit Losses (Topic 326): TDR and Vintage Disclosures (“ASU 2022-02”), which eliminated the accounting guidance for TDR while enhancing disclosure requirements for certain loan refinancing and restructurings by creditors when a borrower is experiencing financial difficulty. The Company applied this guidance on a modified retrospective transition method, which resulted in a positive cumulative effect adjustment to retained earnings of $287 thousand, net of tax. Subsequent to the adoption of ASU 2022-02, the new guidance is applied uniformly to the Company’s entire loan portfolio when estimating expected credit losses. For the three and six months ended June 30, 2023, there was only one C&I loan modification to a borrower experiencing financial difficulty, amounting to $26.0 million or 0.54% of total C&I loans. The loan modification type was a term extension of four months. For the three and six months ended June 30, 2023, the Company recorded an allowance for credit losses of $115 thousand for this modification. There were no loan modifications that subsequently defaulted during the period.
Schedule of Nonaccrual Loans and Loans Past Due 90 or More Days And Still on Accrual Status	The tables below represent the amortized cost of nonaccrual loans, as well as loans past due 90 or more days and still on accrual status, by loan segment and broken out by loans with a recorded ACL and those without a recorded ACL, at June 30, 2023 and December 31, 2022. June 30, 2023 Nonaccrual with No ACL Nonaccrual with an ACL Total Nonaccrual (1) Accruing Loans Past Due 90 Days or More (Dollars in thousands) CRE loans $ 22,286 $ 6,984 $ 29,270 $ 14,737 C&I loans 1,212 21,830 23,042 362 Residential mortgage loans 4,420 4,163 8,583 — Consumer and other loans — 357 357 83 Total $ 27,918 $ 33,334 $ 61,252 $ 15,182 December 31, 2022 Nonaccrual with No ACL Nonaccrual with an ACL Total Nonaccrual (1) Accruing Loans Past Due 90 Days or More (Dollars in thousands) CRE loans $ 29,782 $ 4,133 $ 33,915 $ — C&I loans 1,618 4,002 5,620 336 Residential mortgage loans 5,959 3,816 9,775 — Consumer and other loans — 377 377 65 Total $ 37,359 $ 12,328 $ 49,687 $ 401 __________________________________
Amortized Cost Basis of Collateral-Dependent Loans	The following table presents the amortized cost of collateral-dependent loans at June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 Real Estate Collateral Other Collateral Total Real Estate Collateral Other Collateral Total (Dollars in thousands) CRE loans $ 25,635 $ — $ 25,635 $ 35,523 $ — $ 35,523 C&I loans 1,212 20,203 21,415 1,618 2,743 4,361 Residential mortgage loans 4,420 — 4,420 5,959 — 5,959 Total $ 31,267 $ 20,203 $ 51,470 $ 43,100 $ 2,743 $ 45,843
Aging of Past Due Loans	The following table presents the amortized cost of past due loans, including nonaccrual loans past due 30 or more days, by the number of days past due at June 30, 2023 and December 31, 2022, by loan segment: June 30, 2023 December 31, 2022 30-59 Days 60-89 Days 90 or More Days Total 30-59 Days 60-89 Days 90 or More Days Total (Dollars in thousands) CRE loans $ 7,497 $ 319 $ 21,063 $ 28,879 $ 2,292 $ 2,727 $ 5,694 $ 10,713 C&I loans 765 121 20,150 21,036 3,258 18 2,137 5,413 Residential mortgage loans 1,043 — 4,606 5,649 2,310 — 5,106 7,416 Consumer and other loans 148 57 83 288 617 44 308 969 Total Past Due $ 9,453 $ 497 $ 45,902 $ 55,852 $ 8,477 $ 2,789 $ 13,245 $ 24,511
Financing Receivable Credit Quality Indicators	The following table presents the amortized cost basis of loans receivable by segment, risk rating, and year of origination at June 30, 2023 and December 31, 2022. June 30, 2023 Term Loan by Origination Year Revolving Loans Total 2023 2022 2021 2020 2019 Prior (Dollars in thousands) CRE loans Pass $ 389,783 $ 2,450,867 $ 2,107,752 $ 1,281,552 $ 1,039,543 $ 1,693,896 $ 81,560 $ 9,044,953 Special mention — 2,772 22,388 4,145 22,789 19,165 10,997 82,256 Substandard — 824 8,370 1,001 2,884 51,872 — 64,951 Subtotal $ 389,783 $ 2,454,463 $ 2,138,510 $ 1,286,698 $ 1,065,216 $ 1,764,933 $ 92,557 $ 9,192,160 Year-to-date gross charge offs $ — $ 119 $ — $ 11 $ 34 $ 397 $ — $ 561 C&I loans Pass $ 807,771 $ 1,686,472 $ 885,837 $ 255,862 $ 219,210 $ 107,364 $ 654,007 $ 4,616,523 Special mention 38 19,212 54,415 9,854 173 — 44,858 128,550 Substandard 51 16,977 24,716 4,695 577 2,910 10,127 60,053 Subtotal $ 807,860 $ 1,722,661 $ 964,968 $ 270,411 $ 219,960 $ 110,274 $ 708,992 $ 4,805,126 Year-to-date gross charge offs $ — $ 89 $ 54 $ 45 $ 85 $ 465 $ — $ 738 Residential mortgage loans Pass $ 15,658 $ 373,241 $ 273,044 $ 1,374 $ 29,436 $ 132,782 $ — $ 825,535 Special mention — — — — — — — — Substandard — — 314 — 1,723 6,805 — 8,842 Subtotal $ 15,658 $ 373,241 $ 273,358 $ 1,374 $ 31,159 $ 139,587 $ — $ 834,377 Year-to-date gross charge offs $ — $ — $ — $ — $ — $ — $ — $ — Consumer and other loans Pass $ 3,565 $ 1,158 $ 332 $ 2,739 $ 165 $ 8,861 $ 15,970 $ 32,790 Special mention — — — — — — — — Substandard — — — — — 357 — 357 Subtotal $ 3,565 $ 1,158 $ 332 $ 2,739 $ 165 $ 9,218 $ 15,970 $ 33,147 Year-to-date gross charge offs $ — $ — $ — $ — $ — $ — $ 175 $ 175 Total loans Pass $ 1,216,777 $ 4,511,738 $ 3,266,965 $ 1,541,527 $ 1,288,354 $ 1,942,903 $ 751,537 $ 14,519,801 Special mention 38 21,984 76,803 13,999 22,962 19,165 55,855 210,806 Substandard 51 17,801 33,400 5,696 5,184 61,944 10,127 134,203 Total $ 1,216,866 $ 4,551,523 $ 3,377,168 $ 1,561,222 $ 1,316,500 $ 2,024,012 $ 817,519 $ 14,864,810 Total year-to-date gross charge offs $ — $ 208 $ 54 $ 56 $ 119 $ 862 $ 175 $ 1,474 December 31, 2022 Term Loan by Origination Year Revolving Loans Total 2022 2021 2020 2019 2018 Prior (Dollars in thousands) CRE loans Pass $ 2,421,631 $ 2,194,073 $ 1,372,027 $ 1,076,405 $ 1,018,553 $ 1,064,267 $ 105,274 $ 9,252,230 Special mention — 14,622 7,301 20,426 13,565 26,746 202 82,862 Substandard — 8,240 1,736 7,881 10,250 51,381 — 79,488 Subtotal $ 2,421,631 $ 2,216,935 $ 1,381,064 $ 1,104,712 $ 1,042,368 $ 1,142,394 $ 105,476 $ 9,414,580 C&I loans Pass $ 2,311,344 $ 1,090,034 $ 291,592 $ 298,133 $ 69,721 $ 95,531 $ 864,343 $ 5,020,698 Special mention 17,911 37,393 13,707 110 — 24 5,256 74,401 Substandard — 2,833 5,889 1,000 1,020 3,691 — 14,433 Subtotal $ 2,329,255 $ 1,130,260 $ 311,188 $ 299,243 $ 70,741 $ 99,246 $ 869,599 $ 5,109,532 Residential mortgage loans Pass $ 382,935 $ 283,163 $ 1,386 $ 30,603 $ 62,976 $ 75,242 $ — $ 836,305 Special mention — — — — — — — — Substandard — 311 — 967 384 8,113 — 9,775 Subtotal $ 382,935 $ 283,474 $ 1,386 $ 31,570 $ 63,360 $ 83,355 $ — $ 846,080 Consumer and other loans Pass $ 10,005 $ 723 $ 3,351 $ 223 $ 10 $ 1,420 $ 17,239 $ 32,971 Special mention — — — — — — — — Substandard — — — — — 377 — 377 Subtotal $ 10,005 $ 723 $ 3,351 $ 223 $ 10 $ 1,797 $ 17,239 $ 33,348 Total loans Pass $ 5,125,915 $ 3,567,993 $ 1,668,356 $ 1,405,364 $ 1,151,260 $ 1,236,460 $ 986,856 $ 15,142,204 Special mention 17,911 52,015 21,008 20,536 13,565 26,770 5,458 157,263 Substandard — 11,384 7,625 9,848 11,654 63,562 — 104,073 Total $ 5,143,826 $ 3,631,392 $ 1,696,989 $ 1,435,748 $ 1,176,479 $ 1,326,792 $ 992,314 $ 15,403,540 For the three and six months ended June 30, 2023 and the twelve months ended December 31, 2022, there were no revolving loans converted to term loans.
Loans Sold From Loans Held For Investment	The breakdown of loans by segment that were reclassified from held for investment to held for sale for the three and six months ended June 30, 2023 and 2022, is presented in the following table: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Transfer of loans held for investment to held for sale (Dollars in thousands) CRE loans $ 13,168 $ 57,835 $ 66,776 $ 155,486 C&I loans 61,608 9,867 170,483 16,769 Total $ 74,776 $ 67,702 $ 237,259 $ 172,255
Troubled Debt Restructurings
Summary of Troubled Debt Restructurings with Subsequent Payment Default
interest income reversal, nonaccrual, by loan segment	The following table presents interest income reversals, due to loans being placed on nonaccrual status, by loan segment for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) CRE loans $ 214 $ 1,097 $ 665 $ 1,252 C&I loans 368 7 886 26 Residential mortgage loans 18 — 32 139 Total $ 600 $ 1,104 $ 1,583 $ 1,417

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2023
Leases [Abstract]
Summary of Net Lease Cost and Other Information	The table below summarizes the Company’s net operating lease cost: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Operating lease cost $ 3,825 $ 3,820 $ 7,666 $ 7,827 Short-term lease cost — — — — Variable lease cost 820 806 1,603 1,579 Sublease income (50) (105) (92) (208) Net lease cost $ 4,595 $ 4,521 $ 9,177 $ 9,198 The table below summarizes other information related to the Company’s operating leases: At or for the Six Months Ended 2023 2022 (Dollars in thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash outflows for operating leases $ 8,013 $ 7,953 ROU assets obtained in exchange for lease liabilities, net 6,113 13,438 Weighted-average remaining lease term - operating leases 4.4 years 4.9 years Weighted-average discount rate - operating leases 2.68 % 2.30 %
Summary of Maturity of Remaining Lease Liabilities	The table below summarizes the maturity of remaining lease liabilities: June 30, 2023 (Dollars in thousands) 2023 $ 7,866 2024 15,302 2025 13,542 2026 12,835 2027 7,319 2028 and thereafter 4,815 Total lease payments 61,679 Less: imputed interest 3,728 Total lease obligations $ 57,951

Financial Services, Banking and

Financial Services, Banking and Thrift (Tables)	6 Months Ended
	Jun. 30, 2023
Deposits [Abstract]
Schedule of Deposits	The following is a breakdown of the Company’s deposits at June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 Balance Percentage (%) Balance Percentage (%) (Dollars in thousands) Noninterest bearing demand deposits $ 4,229,247 27 % $ 4,849,493 31 % Money market and NOW accounts 4,188,584 27 % 5,615,784 36 % Savings deposits 224,495 1 % 283,464 2 % Time deposits 6,977,026 45 % 4,990,060 31 % Total deposits $ 15,619,352 100 % $ 15,738,801 100 %

Borrowings (Tables)

Borrowings (Tables)	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Schedule of Borrowing Lines	The tables below summarize the Company’s borrowing lines at June 30, 2023 and December 31, 2022: June 30, 2023 Total Borrowings Outstanding Available Borrowing Capacity Amount Weighted Average Rate (Dollars in thousands) FHLB $ 4,598,689 $ 100,000 5.27 % $ 4,498,689 FRB Discount Window 805,300 460,000 5.25 % 345,300 FRB Bank Term Funding Program (“BTFP”) 1,709,056 1,700,000 4.47 % 9,056 Unsecured Federal Funds lines 417,680 — — % 417,680 Total $ 7,530,725 $ 2,260,000 4.66 % $ 5,270,725 December 31, 2022 Total Borrowings Outstanding Available Borrowing Capacity Amount Weighted Average Rate (Dollars in thousands) FHLB $ 4,583,277 $ 600,000 3.40 % $ 3,983,277 FRB Discount Window 670,058 265,000 4.50 % 405,058 Unsecured Federal Funds lines 451,180 — — % 451,180 Total $ 5,704,515 $ 865,000 3.74 % $ 4,839,515

Subordinated Debentures and C_2

Subordinated Debentures and Convertible Notes (Tables)	6 Months Ended
	Jun. 30, 2023
Subordinated Borrowings [Abstract]
Convertible Debt	The value of the convertible notes at issuance and the carrying value at June 30, 2023 and December 31, 2022, are presented in the tables below: Capitalization Gross June 30, 2023 Total Capitalization Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 444 $ 444 Issuance costs to be capitalized 5 years — $ — — Carrying balance of convertible notes $ 444 $ — $ 444 Capitalization Gross December 31, 2022 Total Capitalization Carrying Amount (Dollars in thousands) Convertible notes principal balance $ 217,500 $ 217,500 Issuance costs to be capitalized 5 years (4,119) $ 3,767 (352) Carrying balance of convertible notes $ 213,381 $ 3,767 $ 217,148

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments, Fair Value	The tables below present the fair value of the Company’s derivative financial instruments at June 30, 2023 and December 31, 2022. The Company’s derivative assets and derivative liabilities are located within “Other assets” and “Other liabilities”, respectively, on the Company’s Consolidated Statements of Financial Condition. June 30, 2023 Notional Fair Value (1) Other Assets Other Liabilities (Dollars in thousands) Derivatives designated as cash flow hedges Interest rate swaps $ 925,000 $ — $ — Forward interest rate collars 500,000 — 4,812 Total $ 1,425,000 $ — $ 4,812 Derivatives not designated as hedges Interest rate contracts with correspondent banks $ 1,589,746 $ 70,165 $ 351 Interest rate contracts with customers 1,263,725 351 72,489 Foreign exchange contracts with correspondent banks 5,691 90 24 Foreign exchange contracts with customers 5,691 30 81 Risk participation agreement 132,117 — 28 Mortgage banking derivatives 3,750 25 4 Total $ 3,000,720 $ 70,661 $ 72,977 __________________________________ (1) The fair values of centrally-cleared derivative contracts are presented net of settled-to-market margin. December 31, 2022 Notional Fair Value Other Assets Other Liabilities (Dollars in thousands) Derivatives designated as cash flow hedges Interest rate swaps $ 614,000 $ 19,773 $ 1,227 Forward interest rate swaps 111,000 5,428 — Forward interest rate collars 500,000 182 828 Total $ 1,225,000 $ 25,383 $ 2,055 Derivatives not designated as hedges Interest rate contracts with correspondent banks $ 1,013,407 $ 73,059 $ 330 Interest rate contracts with customers 1,013,407 330 73,059 Foreign exchange contracts with correspondent banks 2,359 79 — Foreign exchange contracts with customers 2,359 — 73 Risk participation agreement 134,282 — 32 Mortgage banking derivatives 2,801 29 23 Total $ 2,168,615 $ 73,497 $ 73,517

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments	commitments described below as dates indicated below: June 30, 2023 December 31, 2022 (Dollars in thousands) Commitments to extend credit $ 2,761,027 $ 2,856,263 Standby letters of credit 124,060 132,538 Other letters of credit 52,674 22,376 Commitments to fund investments in affordable housing partnerships 9,322 11,792 The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its 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.

Goodwill, Intangible Assets, _2

Goodwill, Intangible Assets, and Servicing Assets (Tables)	6 Months Ended
	Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	The following table provides information regarding the core deposit intangibles at June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 Core Deposit Intangibles Related To: Amortization Period Gross Accumulated Carrying Amount Accumulated Carrying Amount (Dollars in thousands) Foster Bankshares acquisition 10 years $ 2,763 $ (2,716) $ 47 $ (2,668) $ 95 Wilshire Bancorp acquisition 10 years 18,138 (13,355) 4,783 (12,507) 5,631 Total $ 20,901 $ (16,071) $ 4,830 $ (15,175) $ 5,726
Schedule of Servicing Assets	The changes in servicing assets for the three and six months ended June 30, 2023 and 2022, were as follows: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Balance at beginning of period $ 11,628 $ 10,874 $ 11,628 $ 10,418 Additions through originations of servicing assets 884 1,427 1,849 2,890 Amortization (980) (1,086) (1,945) (2,093) Balance at end of period $ 11,532 $ 11,215 $ 11,532 $ 11,215
Summary of Fair Value Inputs	The inputs used in evaluating servicing assets for impairment at June 30, 2023 and December 31, 2022, are presented below. June 30, 2023 December 31, 2022 SBA Servicing Assets: Weighted-average discount rate 10.46% 8.76% Constant prepayment rate 12.13% 12.09% Mortgage Servicing Assets: Weighted-average discount rate 11.63% 11.38% Constant prepayment rate 9.51% 9.61%

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2023
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 June 30, 2023 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Investment securities available for sale: U.S. Treasury securities $ 3,904 $ 3,904 $ — $ — U.S. Government agency and U.S. Government sponsored enterprises: Agency securities 3,837 — 3,837 — Collateralized mortgage obligations 751,740 — 751,740 — Mortgage-backed securities: Residential 435,148 — 435,148 — Commercial 352,851 — 352,851 — Asset-backed securities 149,742 — 149,742 — Corporate securities 18,572 — 18,572 — Municipal securities 200,792 — 199,862 930 Equity investments with readily determinable fair value 4,303 4,303 — — Interest rate contracts 70,516 — 70,516 — Mortgage banking derivatives 25 — 25 — Other derivatives 120 — 120 — Liabilities: Interest rate contracts 72,840 — 72,840 — Mortgage banking derivatives 4 — 4 — Other derivatives 4,945 — 4,917 28 Fair Value Measurements at the End of December 31, 2022 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Investment securities available for sale: U.S. Treasury securities $ 3,886 $ 3,886 $ — $ — U.S. Government agency and U.S. Government sponsored enterprises: Agency securities 3,867 — 3,867 — Collateralized mortgage obligations 793,699 — 793,699 — Mortgage-backed securities: Residential 453,177 — 453,177 — Commercial 368,287 — 368,287 — Asset-backed securities 147,604 — 147,604 — Corporate securities 18,857 — 18,857 — Municipal securities 182,752 — 181,809 943 Equity investments with readily determinable fair value 4,303 4,303 — — Interest rate contracts 73,389 — 73,389 — Mortgage banking derivatives 29 — 29 — Other derivatives 25,462 — 25,462 — Liabilities: Interest rate contracts 73,389 — 73,389 — Mortgage banking derivatives 23 — 23 — Other derivatives 2,160 — 2,128 32
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The table below presents a reconciliation and income statement classification of gains (losses) for the municipal security and risk participation agreements measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Municipal securities: Beginning Balance $ 982 $ 1,029 $ 943 $ 1,038 Change in fair value included in other comprehensive income (52) (10) (13) (19) Ending Balance $ 930 $ 1,019 $ 930 $ 1,019 Risk participation agreements: Beginning Balance $ 35 $ 61 $ 32 $ 93 Change in fair value included in income (expense) (7) (30) (4) (62) Ending Balance $ 28 $ 31 $ 28 $ 31
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 June 30, 2023 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Collateral-dependent loans receivable at fair value: CRE loans $ 4,285 $ — $ — $ 4,285 C&I loans 21,195 — — 21,195 Loans held for sale, net 46,042 — 46,042 — Fair Value Measurements at the End of December 31, 2022 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (Dollars in thousands) Assets: Collateral-dependent loans receivable at fair value: CRE loans $ 807 $ — $ — $ 807 C&I loans 2,744 — — 2,744 Loans held for sale, net 48,795 — 48,795 — OREO 1,050 — — 1,050 For assets measured at fair value on a non-recurring basis, the total net losses, which include charge offs, recoveries, recorded ACL, valuations, and recognized gains and losses on sales are summarized below: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Assets: Collateral-dependent loans receivable at fair value: CRE loans $ (642) $ (763) $ (762) $ (1,374) C&I loans (11,472) (2,026) (11,861) (2,026) Loans held for sale, net — (371) — (988) OREO — — (271) (256)
Carrying Amounts and Estimated Fair Values of Financial Instruments	Carrying amounts and estimated fair values of financial instruments, not previously presented, at June 30, 2023 and December 31, 2022, were as follows: June 30, 2023 Carrying Amount Estimated Fair Value Fair Value Measurement (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 2,302,339 $ 2,302,339 Level 1 Investment securities HTM 269,760 255,344 Level 2 Equity investments without readily determinable fair values 38,660 38,660 Level 2 Loans held for sale 49,246 49,285 Level 2 Loans receivable, net 14,691,814 14,164,650 Level 3 Accrued interest receivable 60,118 60,118 Level 2/3 Servicing assets, net 11,532 16,814 Level 3 Customers’ liabilities on acceptances 659 659 Level 2 Financial Liabilities: Noninterest bearing deposits $ 4,229,247 $ 4,229,247 Level 2 Savings and other interest bearing demand deposits 4,413,079 4,413,079 Level 2 Time deposits 6,977,026 7,007,072 Level 2 FHLB and FRB borrowings 2,260,000 2,253,222 Level 2 Convertible notes 444 441 Level 1 Subordinated debentures 107,188 104,804 Level 2 Accrued interest payable 109,236 109,236 Level 2 Acceptances outstanding 659 659 Level 2 December 31, 2022 Carrying Amount Estimated Fair Value Fair Value Measurement (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 506,776 $ 506,776 Level 1 Interest earning deposits in other financial institutions 735 733 Level 2 Investment securities HTM 271,066 258,407 Level 2 Equity investments without readily determinable fair values 38,093 38,093 Level 2 Loans held for sale 49,245 49,248 Level 2 Loans receivable, net 15,241,181 14,745,881 Level 3 Accrued interest receivable 55,460 55,460 Level 2/3 Servicing assets, net 11,628 17,375 Level 3 Customers’ liabilities on acceptances 818 818 Level 2 Financial Liabilities: Noninterest bearing deposits $ 4,849,493 $ 4,849,493 Level 2 Savings and other interest bearing demand deposits 5,899,248 5,899,248 Level 2 Time deposits 4,990,060 5,020,093 Level 2 FHLB and FRB borrowings 865,000 867,088 Level 2 Convertible notes, net 217,148 213,937 Level 1 Subordinated debentures 106,565 107,944 Level 2 Accrued interest payable 26,668 26,668 Level 2 Acceptances outstanding 818 818 Level 2

Stockholders_ Equity (Tables)

Stockholders’ Equity (Tables)	6 Months Ended
	Jun. 30, 2023
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents the changes to accumulated other comprehensive income for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Balance at beginning of period $ (214,257) $ (108,165) $ (230,857) $ (11,412) Unrealized net (losses) gains on securities available for sale (31,071) (55,658) 144 (196,931) Unrealized net losses on securities available for sale transferred to held to maturity — (36,576) — (36,576) Unrealized net gains on interest rate contracts used for cash flow hedge 13,653 2,006 7,715 6,008 Reclassification adjustments for net (gains) losses realized in net income (3,322) (38) (5,060) 26 Tax effect 6,113 26,724 (826) 67,178 Other comprehensive (loss) income, net of tax (14,627) (63,542) 1,973 (160,295) Balance at end of period $ (228,884) $ (171,707) $ (228,884) $ (171,707)

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2023
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 six months ended June 30, 2023: Number of Shares Weighted-Average Exercise Price Per Share Weighted-Average Aggregate Intrinsic Value (Dollars in thousands) Outstanding - January 1, 2023 649,367 $ 16.63 Granted — — Exercised — — Expired (20,000) 17.18 Forfeited — — Outstanding - June 30, 2023 629,367 $ 16.61 2.40 $ — Options exercisable - June 30, 2023 629,367 $ 16.61 2.40 $ —
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 six months ended June 30, 2023: Number of Shares Weighted-Average Grant Date Fair Value Outstanding (unvested) - January 1, 2023 1,760,373 $ 13.89 Granted 1,504,513 10.10 Vested (811,347) 12.41 Forfeited (126,041) 10.99 Outstanding (unvested) - June 30, 2023 2,327,498 $ 12.11

Regulatory Matters (Tables)

Regulatory Matters (Tables)	6 Months Ended
	Jun. 30, 2023
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 and include the effects of the Company’s election to utilize the five-year transition described above: Actual Ratio Required for Capital Adequacy Purposes Ratio Required To Be Well-Capitalized Ratio Required for Minimum Capital Adequacy With Capital Conservation Buffer June 30, 2023 Amount Ratio (Dollars in thousands) Common equity Tier 1 capital Company $ 1,839,586 11.05 % 4.50 % N/A 7.00 % Bank $ 1,905,339 11.46 % 4.50 % 6.50 % 7.00 % Total capital Company $ 2,102,625 12.64 % 8.00 % N/A 10.50 % Bank $ 2,065,091 12.42 % 8.00 % 10.00 % 10.50 % Tier 1 capital Company $ 1,942,873 11.68 % 6.00 % N/A 8.50 % Bank $ 1,905,339 11.46 % 6.00 % 8.00 % 8.50 % Leverage capital Company $ 1,942,873 9.57 % 4.00 % N/A N/A Bank $ 1,905,339 9.39 % 4.00 % 5.00 % N/A Actual Ratio Required for Capital Adequacy Purposes Ratio Required To Be Well-Capitalized Ratio Required for Minimum Capital Adequacy With Capital Conservation Buffer December 31, 2022 Amount Ratio (Dollars in thousands) Common equity Tier 1 capital Company $ 1,799,020 10.55 % 4.50 % N/A 7.00 % Bank $ 2,049,973 12.03 % 4.50 % 6.50 % 7.00 % Total capital Company $ 2,041,319 11.97 % 8.00 % N/A 10.50 % Bank $ 2,189,607 12.85 % 8.00 % 10.00 % 10.50 % Tier 1 capital Company $ 1,901,685 11.15 % 6.00 % N/A 8.50 % Bank $ 2,049,973 12.03 % 6.00 % 8.00 % 8.50 % Leverage capital Company $ 1,901,685 10.15 % 4.00 % N/A N/A Bank $ 2,049,973 10.94 % 4.00 % 5.00 % N/A

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Service charges on deposit accounts and wire transfers are summarized below: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (Dollars in thousands) Noninterest bearing deposit account income: Monthly service charges $ 241 $ 249 $ 486 $ 501 Customer analysis charges 1,259 1,183 2,385 2,115 NSF charges 711 731 1,446 1,400 Other service charges 89 84 180 181 Total noninterest bearing deposit account income 2,300 2,247 4,497 4,197 Interest bearing deposit account income: Monthly service charges 25 23 49 47 Total service fees on deposit accounts $ 2,325 $ 2,270 $ 4,546 $ 4,244 Wire transfer fee income: Wire transfer fees $ 733 $ 770 $ 1,386 $ 1,489 Foreign exchange fees 117 88 237 269 Total wire transfer fees $ 850 $ 858 $ 1,623 $ 1,758

Hope Bancorp, Inc. (Details)

Hope Bancorp, Inc. (Details)	Jun. 30, 2023 security
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Entity number of Branches	53

Basis of Presentation (Details)

Basis of Presentation (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jan. 01, 2023	Dec. 31, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ 1,127,624		$ 1,083,712
ASU 2022-02 | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		$ 287

Earnings Per Share (Details)

Earnings Per Share (Details)		3 Months Ended		6 Months Ended
	Jun. 07, 2018	Jun. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 06, 2018 USD ($)
Net Income (Numerator)
Basic EPS - common stock | $		$ 38,022,000	$ 52,088,000	$ 77,143,000	$ 112,826,000
Diluted EPS - common stock | $		$ 38,022,000	$ 52,088,000	$ 77,143,000	$ 112,826,000
Weighted-Average Shares (Denominator)
Basic EPS - common stock (in shares)		119,953,174	120,219,919	119,753,321	120,175,894
Effect of dilutive securities:
Stock options, restricted stock, and ESPP shares (in shares)		176,185	479,719	426,122	722,711
Diluted EPS - common stock (shares)		120,129,359	120,699,638	120,179,443	120,898,605
Earnings Per Share
Basic EPS - common stock (in dollars per share) | $ / shares		$ 0.32	$ 0.43	$ 0.64	$ 0.94
Diluted EPS - common stock (in dollars per share) | $ / shares		$ 0.32	$ 0.43	$ 0.64	$ 0.93
Convertible Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share
Aggregate principal amount issued | $		$ 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		2,626,620	1,523,255	1,290,587	681,787

Equity Investments - Narrative

Equity Investments - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Net Investment Income [Line Items]
Equity investments with readily determinable fair value	$ 42,963		$ 42,963		$ 42,396
Realized gain (loss) recorded on equity investments sold	0	$ 0	0	$ 0
Equity investments without readily determinable fair values	38,700		38,700		38,093
Equity investments without readily determinable fair values, impairment	0	$ 0	0	$ 0
Mutual funds
Net Investment Income [Line Items]
Equity investments with readily determinable fair value	4,300		4,300		4,300
Correspondent bank stock
Net Investment Income [Line Items]
Equity investments without readily determinable fair values	370		370		370
CDFI investments
Net Investment Income [Line Items]
Equity investments without readily determinable fair values	1,000		1,000		1,000
CRA investments
Net Investment Income [Line Items]
Equity investments without readily determinable fair values	$ 37,300		$ 37,300		$ 36,700

Equity Investments - Change in

Equity Investments - Change in Fair Value of Equity Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Net change in fair value recorded during the period on equity investments with readily determinable fair value	$ (69)	$ (865)	$ 0	$ (2,112)
Less: 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 held at the end of the period	$ (69)	$ (865)	$ 0	$ (2,112)

Securities Available for Sale -

Securities Available for Sale - Summary of Securities Available for Sale (Details) - USD ($)	3 Months Ended		6 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2022	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 2,233,734,000		$ 2,233,734,000			$ 2,289,421,000
Gross Unrealized Gains	1,082,000		1,082,000			790,000
Gross Unrealized Losses	(318,230,000)		(318,230,000)			(318,082,000)
Fair Value	1,916,586,000		1,916,586,000			1,972,129,000
Amortized Cost	269,760,000		269,760,000			271,066,000
Gross Unrealized Gains	0		0			1,000
Gross Unrealized Losses	14,416,000		14,416,000			12,660,000
Fair Value	255,344,000		255,344,000			258,407,000
Accrued interest receivable for investment securities available for sale	8,500,000		8,500,000			7,800,000
Unrealized gains on securities available for sale net of taxes	(228,884,000)		(228,884,000)			(230,857,000)
Net gains on sales of securities available for sale	0	$ 0	0	$ 0
Available-for-sale Securities
Debt Securities, Available-for-sale [Line Items]
Unrealized gains on securities available for sale net of taxes	(223,000,000)		(223,000,000)			(223,100,000)
US Treasury Notes Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,994,000		3,994,000			3,990,000
Gross Unrealized Gains	0		0			0
Gross Unrealized Losses	(90,000)		(90,000)			(104,000)
Fair Value	3,904,000		3,904,000			3,886,000
Agency Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,000,000		4,000,000			4,000,000
Gross Unrealized Gains	0		0			0
Gross Unrealized Losses	(163,000)		(163,000)			(133,000)
Fair Value	3,837,000		3,837,000			3,867,000
Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	904,848,000		904,848,000			947,541,000
Gross Unrealized Gains	0		0			0
Gross Unrealized Losses	(153,108,000)		(153,108,000)			(153,842,000)
Fair Value	751,740,000		751,740,000			793,699,000
Mortgage-backed securities: Residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	522,145,000		522,145,000			544,084,000
Gross Unrealized Gains	0		0			0
Gross Unrealized Losses	(86,997,000)		(86,997,000)			(90,907,000)
Fair Value	435,148,000		435,148,000			453,177,000
Amortized Cost	154,963,000		154,963,000			157,881,000
Gross Unrealized Gains	0		0			0
Gross Unrealized Losses	6,919,000		6,919,000			7,041,000
Fair Value	148,044,000		148,044,000			150,840,000
Mortgage-backed securities: Commercial
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	407,972,000		407,972,000			417,241,000
Gross Unrealized Gains	0		0			0
Gross Unrealized Losses	(55,121,000)		(55,121,000)			(48,954,000)
Fair Value	352,851,000		352,851,000			368,287,000
Amortized Cost	114,797,000		114,797,000			113,185,000
Gross Unrealized Gains	0		0			1,000
Gross Unrealized Losses	7,497,000		7,497,000			5,619,000
Fair Value	107,300,000		107,300,000			107,567,000
Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	153,536,000		153,536,000			153,539,000
Gross Unrealized Gains	0		0			0
Gross Unrealized Losses	(3,794,000)		(3,794,000)			(5,935,000)
Fair Value	149,742,000		149,742,000			147,604,000
Corporate securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	23,326,000		23,326,000			23,351,000
Gross Unrealized Gains	0		0			0
Gross Unrealized Losses	(4,754,000)		(4,754,000)			(4,494,000)
Fair Value	18,572,000		18,572,000			18,857,000
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	213,913,000		213,913,000			195,675,000
Gross Unrealized Gains	1,082,000		1,082,000			790,000
Gross Unrealized Losses	(14,203,000)		(14,203,000)			(13,713,000)
Fair Value	$ 200,792,000		$ 200,792,000			$ 182,752,000
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%		10%

Securities Available for Sale_2

Securities Available for Sale - Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Securities, Available-for-Sale [Abstract]
Taxable	$ 14,466	$ 11,997	$ 28,512	$ 23,397
Nontaxable	1,068	311	2,147	567
Total	$ 15,534	$ 12,308	$ 30,659	$ 23,964

Securities Available for Sale_3

Securities Available for Sale - Amortized Cost and Estimated Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract]
Due within one year	$ 4,984
Due after one year through five years	147,521
Due after five years through ten years	108,760
Due after ten years	1,972,469
Amortized Cost	2,233,734	$ 2,289,421
Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract]
Due within one year	4,885
Due after one year through five years	136,859
Due after five years through ten years	97,284
Due after ten years	1,677,558
Total	1,916,586	1,972,129
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract]
Due within one year	0
Due after one year through five years	26,641
Due after five years through ten years	8,546
Due after ten years	234,573
Total	269,760
Debt Securities, Held-to-Maturity, Fair Value, Maturity [Abstract]
Due within one year	0
Due after one year through five years	25,589
Due after five years through ten years	8,120
Due after ten years	221,635
Total	255,344
Securities, carrying value	$ 2,010,000	$ 360,700

Securities Available for Sale_4

Securities Available for Sale - Aggregate Unrealized Losses and Fair Value (Details)	Jun. 30, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Number  of Securities
Less than 12 months | security	45	150
12 months or longer | security	287	179
Total | security	332	329
Fair  Value
Less than 12 months	$ 141,862,000	$ 488,959,000
12 months or longer	1,730,025,000	1,443,090,000
Total	1,871,887,000	1,932,049,000
Gross Unrealized Losses
Less than 12 months	(5,125,000)	(37,420,000)
12 months or longer	(313,105,000)	(280,662,000)
Total	$ (318,230,000)	$ (318,082,000)
Collateralized mortgage obligations
Number  of Securities
Less than 12 months | security	6	61
12 months or longer | security	112	59
Total | security	118	120
Fair  Value
Less than 12 months	$ 14,563,000	$ 150,419,000
12 months or longer	737,177,000	643,280,000
Total	751,740,000	793,699,000
Gross Unrealized Losses
Less than 12 months	(1,078,000)	(14,888,000)
12 months or longer	(152,030,000)	(138,954,000)
Total	(153,108,000)	$ (153,842,000)
Allowance for credit losses for available for sale securities	0
Mortgage-backed securities
Gross Unrealized Losses
Allowance for credit losses for available for sale securities	$ 0
Mortgage-backed securities: Residential
Number  of Securities
Less than 12 months | security	2	23
12 months or longer | security	63	42
Total | security	65	65
Fair  Value
Less than 12 months	$ 5,062,000	$ 55,645,000
12 months or longer	430,086,000	397,532,000
Total	435,148,000	453,177,000
Gross Unrealized Losses
Less than 12 months	(266,000)	(5,616,000)
12 months or longer	(86,731,000)	(85,291,000)
Total	$ (86,997,000)	$ (90,907,000)
Mortgage-backed securities: Commercial
Number  of Securities
Less than 12 months | security	8	29
12 months or longer | security	48	26
Total | security	56	55
Fair  Value
Less than 12 months	$ 48,910,000	$ 172,963,000
12 months or longer	303,941,000	195,324,000
Total	352,851,000	368,287,000
Gross Unrealized Losses
Less than 12 months	(2,633,000)	(12,156,000)
12 months or longer	(52,488,000)	(36,798,000)
Total	$ (55,121,000)	$ (48,954,000)
Corporate securities
Number  of Securities
Less than 12 months | security	0	1
12 months or longer | security	6	5
Total | security	6	6
Fair  Value
Less than 12 months	$ 0	$ 3,401,000
12 months or longer	18,572,000	15,456,000
Total	18,572,000	18,857,000
Gross Unrealized Losses
Less than 12 months	0	(600,000)
12 months or longer	(4,754,000)	(3,894,000)
Total	(4,754,000)	$ (4,494,000)
Allowance for credit losses for available for sale securities	$ 0
Municipal securities
Number  of Securities
Less than 12 months | security	29	31
12 months or longer | security	38	32
Total | security	67	63
Fair  Value
Less than 12 months	$ 73,327,000	$ 76,942,000
12 months or longer	82,766,000	65,730,000
Total	156,093,000	142,672,000
Gross Unrealized Losses
Less than 12 months	(1,148,000)	(3,207,000)
12 months or longer	(13,055,000)	(10,506,000)
Total	$ (14,203,000)	$ (13,713,000)
U.S. Government Agency and U.S. Government Sponsored Enterprises
Gross Unrealized Losses
Percentage of portfolio	83.10%
Asset-backed Securities
Number  of Securities
Less than 12 months | security	0	3
12 months or longer | security	18	15
Total | security	18	18
Fair  Value
Less than 12 months	$ 0	$ 21,836,000
12 months or longer	149,742,000	125,768,000
Total	149,742,000	147,604,000
Gross Unrealized Losses
Less than 12 months	0	(716,000)
12 months or longer	(3,794,000)	(5,219,000)
Total	$ (3,794,000)	$ (5,935,000)
US Treasury Notes Securities
Number  of Securities
Less than 12 months | security	0	1
12 months or longer | security	1	0
Total | security	1	1
Fair  Value
Less than 12 months	$ 0	$ 3,886,000
12 months or longer	3,904,000	0
Total	3,904,000	3,886,000
Gross Unrealized Losses
Less than 12 months	0	(104,000)
12 months or longer	(90,000)	0
Total	$ (90,000)	$ (104,000)
Agency Securities
Number  of Securities
Less than 12 months | security	0	1
12 months or longer | security	1	0
Total | security	1	1
Fair  Value
Less than 12 months	$ 0	$ 3,867,000
12 months or longer	3,837,000	0
Total	3,837,000	3,867,000
Gross Unrealized Losses
Less than 12 months	0	(133,000)
12 months or longer	(163,000)	0
Total	$ (163,000)	$ (133,000)

Held to Maturity (Details)

Held to Maturity (Details) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	$ 0	$ 0

Loans Receivable and Allowanc_3

Loans Receivable and Allowance for Credit Losses - Schedule of Loans Receivable By Major Category (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) segment	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, net of deferred costs and fees	$ 14,864,810		$ 15,403,540
Total	(172,996)	$ (163,544)	(162,359)	$ (151,580)	$ (147,450)	$ (140,550)
Loans receivable, net of allowance for credit losses	14,691,814		15,241,181
Net deferred fees/costs	$ 10,500		11,100
Number of portfolio segments | segment	4
Increase (Decrease) in Finance Receivables	$ (538,700)
Increase (decrease) in financing receivable, percentage	(3.50%)
CRE loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, net of deferred costs and fees	$ 9,192,160		9,414,580
Total	(105,321)	(108,835)	(95,884)	(99,824)	(106,545)	(108,440)
C&I loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, net of deferred costs and fees	4,805,126		5,109,532
Total	(54,894)	(42,790)	(56,872)	(44,852)	(35,676)	(27,811)
Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, net of deferred costs and fees	834,377		846,080
Total	(11,983)	(11,253)	(8,920)	(6,079)	(4,262)	(3,316)
Consumer and other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable, net of deferred costs and fees	33,147		33,348
Total	$ (798)	$ (666)	$ (683)	$ (825)	$ (967)	$ (983)

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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	$ 163,544	$ 147,450	$ 162,359	$ 140,550
Provision (credit) for credit/loan losses	8,900	3,200	10,600	(7,800)
Loans charged off	(979)	(712)	(1,474)	(2,215)
Recoveries of charge offs	1,531	1,642	1,918	21,045
Balance, end of period	172,996	151,580	172,996	151,580
Allowance for credit losses:
Individually evaluated	13,173		13,173		$ 3,856
Collectively evaluated	159,823		159,823		158,503
Total	172,996	151,580	172,996	151,580	162,359
Loans outstanding:
Individually evaluated	60,901		60,901		66,149
Collectively evaluated	14,803,909		14,803,909		15,337,391
Total	14,864,810		14,864,810		15,403,540
Reserve for unfunded loan commitments recorded in other liabilities	3,100		3,100		1,400
Additions to reserves for unfunded loan commitments recorded in credit related expenses	110	180	$ 1,730	380
Threshold period for loans to be placed on nonaccrual status			90 days
ASU 2022-02
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			$ (407)
Allowance for credit losses:
Total					(407)
Real estate
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	108,835	106,545	95,884	108,440
Provision (credit) for credit/loan losses	(3,076)	(7,229)	9,787	(25,542)
Loans charged off	(561)	(476)	(561)	(1,751)
Recoveries of charge offs	123	984	192	18,677
Balance, end of period	105,321	99,824	105,321	99,824
Allowance for credit losses:
Individually evaluated	1,150		1,150		870
Collectively evaluated	104,171		104,171		95,014
Total	105,321	99,824	105,321	99,824	95,884
Loans outstanding:
Individually evaluated	29,096		29,096		43,461
Collectively evaluated	9,163,064		9,163,064		9,371,119
Total	9,192,160		9,192,160		9,414,580
Real estate | ASU 2022-02
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			19
Allowance for credit losses:
Total					19
C&I loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	42,790	35,676	56,872	27,811
Provision (credit) for credit/loan losses	11,013	8,715	(2,487)	15,051
Loans charged off	(298)	(172)	(738)	(349)
Recoveries of charge offs	1,389	633	1,673	2,339
Balance, end of period	54,894	44,852	54,894	44,852
Allowance for credit losses:
Individually evaluated	11,706		11,706		2,941
Collectively evaluated	43,188		43,188		53,931
Total	54,894	44,852	54,894	44,852	56,872
Loans outstanding:
Individually evaluated	23,042		23,042		12,477
Collectively evaluated	4,782,084		4,782,084		5,097,055
Total	4,805,126		4,805,126		5,109,532
C&I loans | ASU 2022-02
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			(426)
Allowance for credit losses:
Total					(426)
Residential mortgage loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	11,253	4,262	8,920	3,316
Provision (credit) for credit/loan losses	730	1,817	3,063	2,763
Loans charged off	0	0	0	0
Recoveries of charge offs	0	0	0	0
Balance, end of period	11,983	6,079	11,983	6,079
Allowance for credit losses:
Individually evaluated	245		245		24
Collectively evaluated	11,738		11,738		8,896
Total	11,983	6,079	11,983	6,079	8,920
Loans outstanding:
Individually evaluated	8,583		8,583		9,775
Collectively evaluated	825,794		825,794		836,305
Total	834,377		834,377		846,080
Residential mortgage loans | ASU 2022-02
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			0
Allowance for credit losses:
Total					0
Consumer and other loans
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period	666	967	683	983
Provision (credit) for credit/loan losses	233	(103)	237	(72)
Loans charged off	(120)	(64)	(175)	(115)
Recoveries of charge offs	19	25	53	29
Balance, end of period	798	825	798	825
Allowance for credit losses:
Individually evaluated	72		72		21
Collectively evaluated	726		726		662
Total	798	$ 825	798	$ 825	683
Loans outstanding:
Individually evaluated	180		180		436
Collectively evaluated	32,967		32,967		32,912
Total	$ 33,147		33,147		33,348
Consumer and other loans | ASU 2022-02
Allowance for Loan Losses by Portfolio Segment
Balance, beginning of period			$ 0
Allowance for credit losses:
Total					$ 0

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	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Financing Receivable, Nonaccrual [Line Items]
Threshold period for loans to be placed on nonaccrual status	90 days
Guaranteed portion of SBA loans excluded from Nonaccrual loans	$ 11,900	$ 9,800
Nonaccrual with No ACL	27,918	37,359
Nonaccrual with an ACL	33,334	12,328
Financing Receivable, Nonaccrual	61,252	49,687
Accruing Loans Past Due 90 Days or More	15,182	401
CRE loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	22,286		$ 29,782
Nonaccrual with an ACL	6,984		4,133
Financing Receivable, Nonaccrual	29,270		33,915
Accruing Loans Past Due 90 Days or More	14,737		$ 0
C&I loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	1,212	1,618
Nonaccrual with an ACL	21,830	4,002
Financing Receivable, Nonaccrual	23,042	5,620
Accruing Loans Past Due 90 Days or More	362	336
Residential Portfolio Segment
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	4,420	5,959
Nonaccrual with an ACL	4,163	3,816
Financing Receivable, Nonaccrual	8,583	9,775
Accruing Loans Past Due 90 Days or More	0	0
Consumer
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No ACL	0	0
Nonaccrual with an ACL	357	377
Financing Receivable, Nonaccrual	357	377
Accruing Loans Past Due 90 Days or More	$ 83	$ 65

Loans Receivable and Allowanc_6

Loans Receivable and Allowance for Credit Losses - Collateral-Dependent Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 172,996	$ 163,544	$ 162,359	$ 151,580	$ 147,450	$ 140,550
Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	51,470		45,843
Real Estate Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	31,267		43,100
Other Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	20,203		2,743
Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	105,321	108,835	95,884	99,824	106,545	108,440
Real estate | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	25,635		35,523
Real estate | Real Estate Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	25,635		35,523
Real estate | Other Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0		0
C&I loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	54,894	42,790	56,872	44,852	35,676	27,811
C&I loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	21,415		4,361
C&I loans | Real Estate Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,212		1,618
C&I loans | Other Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	20,203		2,743
Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	11,983	11,253	8,920	6,079	4,262	3,316
Residential mortgage loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,420		5,959
Residential mortgage loans | Real Estate Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,420		5,959
Residential mortgage loans | Other Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0		0
Consumer and other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 798	$ 666	$ 683	$ 825	$ 967	$ 983

Loans Receivable and Allowanc_7

Loans Receivable and Allowance for Credit Losses - Interest Income Reversals (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income reversals	$ 600	$ 1,104	$ 1,583	$ 1,417
Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income reversals	214	1,097	665	1,252
C&I loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income reversals	368	7	886	26
Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income reversals	$ 18	$ 0	$ 32	$ 139

Loans Receivable and Allowanc_8

Loans Receivable and Allowance for Credit Losses - Past Due Financing Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	$ 14,864,810	$ 15,403,540
Total Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	55,852	24,511
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	9,453	8,477
60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	497	2,789
90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	45,902	13,245
Real estate
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	9,192,160	9,414,580
Real estate | Total Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	28,879	10,713
Real estate | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	7,497	2,292
Real estate | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	319	2,727
Real estate | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	21,063	5,694
C&I loans
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	4,805,126	5,109,532
C&I loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	21,036	5,413
C&I loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	765	3,258
C&I loans | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	121	18
C&I loans | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	20,150	2,137
Residential mortgage loans
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	834,377	846,080
Residential mortgage loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	5,649	7,416
Residential mortgage loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	1,043	2,310
Residential mortgage loans | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	0	0
Residential mortgage loans | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	4,606	5,106
Consumer and other loans
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	33,147	33,348
Consumer and other loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	288	969
Consumer and other loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	148	617
Consumer and other loans | 60-89 Days  Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	57	44
Consumer and other loans | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost, past due loans	$ 83	$ 308

Loans Receivable and Allowanc_9

Loans Receivable and Allowance for Credit Losses - Financing Receivable Credit Quality Indicators (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	$ 1,216,866,000		$ 1,216,866,000		$ 5,143,826,000
Term loan originated in year two	4,551,523,000		4,551,523,000		3,631,392,000
Term loan originated in year three	3,377,168,000		3,377,168,000		1,696,989,000
Term loan originated in year four	1,561,222,000		1,561,222,000		1,435,748,000
Term loan originated in year five	1,316,500,000		1,316,500,000		1,176,479,000
Term loan originated prior to year five	2,024,012,000		2,024,012,000		1,326,792,000
Revolving Loans	817,519,000		817,519,000		992,314,000
Total	14,864,810,000		14,864,810,000		15,403,540,000
Current period gross charge offs, Year One, Originated, Current Fiscal Year			0
Current period gross charge offs, Year Two, Originated, Fiscal Year before Current Fiscal Year			208,000
Current period gross charge offs, Year Three, Originated, Two Years before Current Fiscal Year			54,000
Current period gross charge offs, Year Four, Originated, Three Years before Current Fiscal Year			56,000
Current period gross charge offs, Year Five, Originated, Four Years before Current Fiscal Year			119,000
Current period gross charge offs, Originated, More than Five Years before Current Fiscal Year			862,000
Current period gross charge offs, Revolving			175,000
Allowance for credit loss, writeoff	979,000	$ 712,000	1,474,000	$ 2,215,000
Revolving loans converted to term loans	0		0		0
CRE loans
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	389,783,000		389,783,000		2,421,631,000
Term loan originated in year two	2,454,463,000		2,454,463,000		2,216,935,000
Term loan originated in year three	2,138,510,000		2,138,510,000		1,381,064,000
Term loan originated in year four	1,286,698,000		1,286,698,000		1,104,712,000
Term loan originated in year five	1,065,216,000		1,065,216,000		1,042,368,000
Term loan originated prior to year five	1,764,933,000		1,764,933,000		1,142,394,000
Revolving Loans	92,557,000		92,557,000		105,476,000
Total	9,192,160,000		9,192,160,000		9,414,580,000
Current period gross charge offs, Year One, Originated, Current Fiscal Year			0
Current period gross charge offs, Year Two, Originated, Fiscal Year before Current Fiscal Year			119,000
Current period gross charge offs, Year Three, Originated, Two Years before Current Fiscal Year			0
Current period gross charge offs, Year Four, Originated, Three Years before Current Fiscal Year			11,000
Current period gross charge offs, Year Five, Originated, Four Years before Current Fiscal Year			34,000
Current period gross charge offs, Originated, More than Five Years before Current Fiscal Year			397,000
Current period gross charge offs, Revolving			0
Allowance for credit loss, writeoff	561,000	476,000	561,000	1,751,000
C&I loans
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	807,860,000		807,860,000		2,329,255,000
Term loan originated in year two	1,722,661,000		1,722,661,000		1,130,260,000
Term loan originated in year three	964,968,000		964,968,000		311,188,000
Term loan originated in year four	270,411,000		270,411,000		299,243,000
Term loan originated in year five	219,960,000		219,960,000		70,741,000
Term loan originated prior to year five	110,274,000		110,274,000		99,246,000
Revolving Loans	708,992,000		708,992,000		869,599,000
Total	4,805,126,000		4,805,126,000		5,109,532,000
Current period gross charge offs, Year One, Originated, Current Fiscal Year			0
Current period gross charge offs, Year Two, Originated, Fiscal Year before Current Fiscal Year			89,000
Current period gross charge offs, Year Three, Originated, Two Years before Current Fiscal Year			54,000
Current period gross charge offs, Year Four, Originated, Three Years before Current Fiscal Year			45,000
Current period gross charge offs, Year Five, Originated, Four Years before Current Fiscal Year			85,000
Current period gross charge offs, Originated, More than Five Years before Current Fiscal Year			465,000
Current period gross charge offs, Revolving			0
Allowance for credit loss, writeoff	298,000	172,000	738,000	349,000
Residential Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	15,658,000		15,658,000		382,935,000
Term loan originated in year two	373,241,000		373,241,000		283,474,000
Term loan originated in year three	273,358,000		273,358,000		1,386,000
Term loan originated in year four	1,374,000		1,374,000		31,570,000
Term loan originated in year five	31,159,000		31,159,000		63,360,000
Term loan originated prior to year five	139,587,000		139,587,000		83,355,000
Revolving Loans	0		0		0
Total	834,377,000		834,377,000		846,080,000
Current period gross charge offs, Year One, Originated, Current Fiscal Year			0
Current period gross charge offs, Year Two, Originated, Fiscal Year before Current Fiscal Year			0
Current period gross charge offs, Year Three, Originated, Two Years before Current Fiscal Year			0
Current period gross charge offs, Year Four, Originated, Three Years before Current Fiscal Year			0
Current period gross charge offs, Year Five, Originated, Four Years before Current Fiscal Year			0
Current period gross charge offs, Originated, More than Five Years before Current Fiscal Year			0
Current period gross charge offs, Revolving			0
Allowance for credit loss, writeoff	0	0	0	0
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	3,565,000		3,565,000		10,005,000
Term loan originated in year two	1,158,000		1,158,000		723,000
Term loan originated in year three	332,000		332,000		3,351,000
Term loan originated in year four	2,739,000		2,739,000		223,000
Term loan originated in year five	165,000		165,000		10,000
Term loan originated prior to year five	9,218,000		9,218,000		1,797,000
Revolving Loans	15,970,000		15,970,000		17,239,000
Total	33,147,000		33,147,000		33,348,000
Current period gross charge offs, Year One, Originated, Current Fiscal Year			0
Current period gross charge offs, Year Two, Originated, Fiscal Year before Current Fiscal Year			0
Current period gross charge offs, Year Three, Originated, Two Years before Current Fiscal Year			0
Current period gross charge offs, Year Four, Originated, Three Years before Current Fiscal Year			0
Current period gross charge offs, Year Five, Originated, Four Years before Current Fiscal Year			0
Current period gross charge offs, Originated, More than Five Years before Current Fiscal Year			0
Current period gross charge offs, Revolving			175,000
Allowance for credit loss, writeoff	120,000	$ 64,000	175,000	$ 115,000
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	1,216,777,000		1,216,777,000		5,125,915,000
Term loan originated in year two	4,511,738,000		4,511,738,000		3,567,993,000
Term loan originated in year three	3,266,965,000		3,266,965,000		1,668,356,000
Term loan originated in year four	1,541,527,000		1,541,527,000		1,405,364,000
Term loan originated in year five	1,288,354,000		1,288,354,000		1,151,260,000
Term loan originated prior to year five	1,942,903,000		1,942,903,000		1,236,460,000
Revolving Loans	751,537,000		751,537,000		986,856,000
Total	14,519,801,000		14,519,801,000		15,142,204,000
Pass | CRE loans
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	389,783,000		389,783,000		2,421,631,000
Term loan originated in year two	2,450,867,000		2,450,867,000		2,194,073,000
Term loan originated in year three	2,107,752,000		2,107,752,000		1,372,027,000
Term loan originated in year four	1,281,552,000		1,281,552,000		1,076,405,000
Term loan originated in year five	1,039,543,000		1,039,543,000		1,018,553,000
Term loan originated prior to year five	1,693,896,000		1,693,896,000		1,064,267,000
Revolving Loans	81,560,000		81,560,000		105,274,000
Total	9,044,953,000		9,044,953,000		9,252,230,000
Pass | C&I loans
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	807,771,000		807,771,000		2,311,344,000
Term loan originated in year two	1,686,472,000		1,686,472,000		1,090,034,000
Term loan originated in year three	885,837,000		885,837,000		291,592,000
Term loan originated in year four	255,862,000		255,862,000		298,133,000
Term loan originated in year five	219,210,000		219,210,000		69,721,000
Term loan originated prior to year five	107,364,000		107,364,000		95,531,000
Revolving Loans	654,007,000		654,007,000		864,343,000
Total	4,616,523,000		4,616,523,000		5,020,698,000
Pass | Residential Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	15,658,000		15,658,000		382,935,000
Term loan originated in year two	373,241,000		373,241,000		283,163,000
Term loan originated in year three	273,044,000		273,044,000		1,386,000
Term loan originated in year four	1,374,000		1,374,000		30,603,000
Term loan originated in year five	29,436,000		29,436,000		62,976,000
Term loan originated prior to year five	132,782,000		132,782,000		75,242,000
Revolving Loans	0		0		0
Total	825,535,000		825,535,000		836,305,000
Pass | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	3,565,000		3,565,000		10,005,000
Term loan originated in year two	1,158,000		1,158,000		723,000
Term loan originated in year three	332,000		332,000		3,351,000
Term loan originated in year four	2,739,000		2,739,000		223,000
Term loan originated in year five	165,000		165,000		10,000
Term loan originated prior to year five	8,861,000		8,861,000		1,420,000
Revolving Loans	15,970,000		15,970,000		17,239,000
Total	32,790,000		32,790,000		32,971,000
Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	38,000		38,000		17,911,000
Term loan originated in year two	21,984,000		21,984,000		52,015,000
Term loan originated in year three	76,803,000		76,803,000		21,008,000
Term loan originated in year four	13,999,000		13,999,000		20,536,000
Term loan originated in year five	22,962,000		22,962,000		13,565,000
Term loan originated prior to year five	19,165,000		19,165,000		26,770,000
Revolving Loans	55,855,000		55,855,000		5,458,000
Total	210,806,000		210,806,000		157,263,000
Special mention | CRE loans
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	0		0		0
Term loan originated in year two	2,772,000		2,772,000		14,622,000
Term loan originated in year three	22,388,000		22,388,000		7,301,000
Term loan originated in year four	4,145,000		4,145,000		20,426,000
Term loan originated in year five	22,789,000		22,789,000		13,565,000
Term loan originated prior to year five	19,165,000		19,165,000		26,746,000
Revolving Loans	10,997,000		10,997,000		202,000
Total	82,256,000		82,256,000		82,862,000
Special mention | C&I loans
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	38,000		38,000		17,911,000
Term loan originated in year two	19,212,000		19,212,000		37,393,000
Term loan originated in year three	54,415,000		54,415,000		13,707,000
Term loan originated in year four	9,854,000		9,854,000		110,000
Term loan originated in year five	173,000		173,000		0
Term loan originated prior to year five	0		0		24,000
Revolving Loans	44,858,000		44,858,000		5,256,000
Total	128,550,000		128,550,000		74,401,000
Special mention | Residential Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	0		0		0
Term loan originated in year two	0		0		0
Term loan originated in year three	0		0		0
Term loan originated in year four	0		0		0
Term loan originated in year five	0		0		0
Term loan originated prior to year five	0		0		0
Revolving Loans	0		0		0
Total	0		0		0
Special mention | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	0		0		0
Term loan originated in year two	0		0		0
Term loan originated in year three	0		0		0
Term loan originated in year four	0		0		0
Term loan originated in year five	0		0		0
Term loan originated prior to year five	0		0		0
Revolving Loans	0		0		0
Total	0		0		0
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	51,000		51,000		0
Term loan originated in year two	17,801,000		17,801,000		11,384,000
Term loan originated in year three	33,400,000		33,400,000		7,625,000
Term loan originated in year four	5,696,000		5,696,000		9,848,000
Term loan originated in year five	5,184,000		5,184,000		11,654,000
Term loan originated prior to year five	61,944,000		61,944,000		63,562,000
Revolving Loans	10,127,000		10,127,000		0
Total	134,203,000		134,203,000		104,073,000
Substandard | CRE loans
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	0		0		0
Term loan originated in year two	824,000		824,000		8,240,000
Term loan originated in year three	8,370,000		8,370,000		1,736,000
Term loan originated in year four	1,001,000		1,001,000		7,881,000
Term loan originated in year five	2,884,000		2,884,000		10,250,000
Term loan originated prior to year five	51,872,000		51,872,000		51,381,000
Revolving Loans	0		0		0
Total	64,951,000		64,951,000		79,488,000
Substandard | C&I loans
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	51,000		51,000		0
Term loan originated in year two	16,977,000		16,977,000		2,833,000
Term loan originated in year three	24,716,000		24,716,000		5,889,000
Term loan originated in year four	4,695,000		4,695,000		1,000,000
Term loan originated in year five	577,000		577,000		1,020,000
Term loan originated prior to year five	2,910,000		2,910,000		3,691,000
Revolving Loans	10,127,000		10,127,000		0
Total	60,053,000		60,053,000		14,433,000
Substandard | Residential Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	0		0		0
Term loan originated in year two	0		0		311,000
Term loan originated in year three	314,000		314,000		0
Term loan originated in year four	0		0		967,000
Term loan originated in year five	1,723,000		1,723,000		384,000
Term loan originated prior to year five	6,805,000		6,805,000		8,113,000
Revolving Loans	0		0		0
Total	8,842,000		8,842,000		9,775,000
Substandard | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Term loan originated in year one	0		0		0
Term loan originated in year two	0		0		0
Term loan originated in year three	0		0		0
Term loan originated in year four	0		0		0
Term loan originated in year five	0		0		0
Term loan originated prior to year five	357,000		357,000		377,000
Revolving Loans	0		0		0
Total	$ 357,000		$ 357,000		$ 377,000

Loans Receivable and Allowan_10

Loans Receivable and Allowance for Credit Losses - Loans Held For Investment - Reclassification to Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfer of loans held for investment to held for sale	$ 74,776	$ 67,702	$ 237,259	$ 172,255
CRE loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfer of loans held for investment to held for sale	13,168	57,835	66,776	155,486
C&I loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfer of loans held for investment to held for sale	$ 61,608	$ 9,867	$ 170,483	$ 16,769

Loans Receivable and Allowan_11

Loans Receivable and Allowance for Credit Losses - Additional Information (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($) security	Jan. 01, 2023 USD ($)	Dec. 31, 2022 USD ($)
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)	2%	2%
Positive or negative qualitative adjustment of the Loss Migration Ratio	0.25%	0.25%
Financing receivable, balance threshold to determine individual evaluation for impairment	$ 1,000	$ 1,000
Retained earnings	1,127,624	1,127,624		$ 1,083,712
Loan Receivable, Modification to Borrowers Experiencing Financial Difficulty, Defaulted		0
Financing Receivable, Modification, Commitment to Lend				40
Total TDR loans				41,100
Allowance for TDRs				2,800
Accrued interest receivable on loans	50,600	50,600		47,300
Loans held for sale, at lower of cost or fair value	49,246	49,246		49,245
Cumulative Effect, Period of Adoption, Adjustment | ASU 2022-02
Financing Receivable, Allowance for Credit Loss [Line Items]
Retained earnings			$ 287
TDR Loans on Accrual Status
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDR loans				16,900
Troubled Debt Restructuring Nonaccrual Status [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDR loans				$ 24,200
Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for sale, at lower of cost or fair value	3,200	3,200
Commercial Real Estate and Commercial Business Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for sale, at lower of cost or fair value	46,000	$ 46,000
C&I loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of loan modifications | security		1
Financing Receivable, Modifications to Borrowers Experiencing Financial Difficulty		$ 26,000
Modifications to borrowers experiencing financial difficulty, percentage of total loans		0.54%
Loan Receivable, Modification, Extension Term		4 months
Modifications to borrowers experiencing financial difficulty, allowance for credit losses	$ 115

Leases - Additional Information

Leases - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) lease security	Jun. 30, 2022 USD ($)
Lessee, Lease, Description [Line Items]
Extension options, term of extension			5 years
Rent expense	$ 4,300,000	$ 4,700,000	$ 9,200,000	$ 9,300,000
Operating Lease, Impairment Loss	0		$ (93,000)	$ 0
Number of Branches Consolidated | security			1
Number of operating lease commitments not yet commenced | lease			1
Operating leases, not yet commenced	668,000		$ 668,000
Short-term operating lease liability	14,400,000		14,400,000
Long-term operating lease liability	$ 43,600,000		$ 43,600,000
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term for operating leases	0 years		0 years
Extension options, term of extension			2 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term for operating leases	10 years		10 years
Extension options, term of extension			5 years
Operating leases, not yet commenced, term	5 years		5 years

Leases - Net Lease Cost (Detail

Leases - Net Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Leases [Abstract]
Operating lease cost	$ 3,825	$ 3,820	$ 7,666	$ 7,827
Short-term lease cost	0	0	0	0
Variable lease cost	820	806	1,603	1,579
Sublease income	(50)	(105)	(92)	(208)
Net lease cost	$ 4,595	$ 4,521	$ 9,177	$ 9,198

Leases - Other Information (Det

Leases - Other Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) lease	Jun. 30, 2022 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows for operating leases | $	$ 8,013	$ 7,953
ROU assets obtained in exchange for lease liabilities, net | $	$ 6,113	$ 13,438
Weighted-average remaining lease term - operating leases	4 years 4 months 24 days	4 years 10 months 24 days
Weighted-average discount rate - operating leases	2.68%	2.30%
Number of operating lease commitments not yet commenced | lease	1
Number of leases extended | lease	8
Number of new leases | lease	1
Long-term operating lease liability | $	$ 43,600

Leases - Maturities of Remainin

Leases - Maturities of Remaining Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Leases [Abstract]
2023	$ 7,866
2024	15,302
2025	13,542
2026	12,835
2027	7,319
2028 and thereafter	4,815
Total lease payments	61,679
Less: imputed interest	3,728
Total lease obligations	$ 57,951	$ 59,088

Deposits (Details)

Deposits (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Deposits Disclosure [Line Items]
Time Deposits, $250,000 or More	$ 2,430,000,000	$ 2,430,000,000		$ 2,390,000,000
Brokered deposits	2,280,000,000	2,280,000,000		1,180,000,000
Noninterest bearing	4,229,247,000	4,229,247,000		4,849,493,000
Money market and NOW accounts	4,188,584,000	4,188,584,000		5,615,784,000
Savings deposits	224,495,000	224,495,000		283,464,000
Time deposits	6,977,026,000	6,977,026,000		4,990,060,000
Total deposits	$ 15,619,352,000	$ 15,619,352,000		$ 15,738,801,000
Percent of total deposit balance, by type	100%	100%		100%
Net change in deposits	$ (119,400,000)	$ (119,449,000)	$ (10,820,000)
Increase (Decrease) in Deposits, Percentage		(0.80%)
Money market and NOW accounts
Deposits Disclosure [Line Items]
Brokered deposits	$ 70,000,000	$ 70,000,000		$ 70,200,000
Percent of total deposit balance, by type	27%	27%		36%
Time deposit accounts
Deposits Disclosure [Line Items]
Brokered deposits	$ 2,210,000,000	$ 2,210,000,000		$ 1,110,000,000
Noninterest Bearing Demand Deposits
Deposits Disclosure [Line Items]
Percent of total deposit balance, by type	27%	27%		31%
Savings Deposits
Deposits Disclosure [Line Items]
Percent of total deposit balance, by type	1%	1%		2%
Bank Time Deposits
Deposits Disclosure [Line Items]
Percent of total deposit balance, by type	45%	45%		31%
California State Treasurer
Deposits Disclosure [Line Items]
Time Deposits, $250,000 or More	$ 300,000,000	$ 300,000,000		$ 300,000,000
Required eligible collateral pledge on outstanding deposits, minimum percentage	110%	110%
Securities pledged as collateral	$ 332,600,000	$ 332,600,000		$ 348,000,000

Borrowings - Maturities of FHLB

Borrowings - Maturities of FHLB Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Short-Term Debt [Line Items]
Total Borrowing Capacity	$ 7,530,725	$ 5,704,515
Amount	$ 2,260,000	$ 865,000
Weighted Average Rate	4.66%	3.74%
Available Borrowing Capacity	$ 5,270,725	$ 4,839,515
FRB
Short-Term Debt [Line Items]
Total Borrowing Capacity		4,583,277
Amount		$ 600,000
Weighted Average Rate		3.40%
Available Borrowing Capacity		$ 3,983,277
FRB Discount Window
Short-Term Debt [Line Items]
Total Borrowing Capacity	805,300	670,058
Amount	$ 460,000	$ 265,000
Weighted Average Rate	5.25%	4.50%
Available Borrowing Capacity	$ 345,300	$ 405,058
FRB Bank Term Funding Program (“BTFP”)
Short-Term Debt [Line Items]
Total Borrowing Capacity	1,709,056
Amount	$ 1,700,000
Weighted Average Rate	4.47%
Available Borrowing Capacity	$ 9,056
Unsecured Federal Funds lines
Short-Term Debt [Line Items]
Total Borrowing Capacity	417,680	451,180
Amount	$ 0	$ 0
Weighted Average Rate	0%	0%
Available Borrowing Capacity	$ 417,680	$ 451,180
Federal Home Loan Bank Certificates and Obligations (FHLB)
Short-Term Debt [Line Items]
Total Borrowing Capacity	4,598,689
Amount	$ 100,000
Weighted Average Rate	5.27%
Available Borrowing Capacity	$ 4,498,689

Borrowings - Narrative (Details

Borrowings - Narrative (Details) $ in Thousands	Jun. 30, 2023 USD ($) securities	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
FHLB and FRB borrowings	$ 2,260,000	$ 865,000
Percent of assets	25%
Percent outstanding advances	100%
Unsecured Federal Funds lines
Debt Instrument [Line Items]
FHLB and FRB borrowings	$ 0	0
Qualifying Loans
Debt Instrument [Line Items]
Asset balance used to determine maximum borrowing capacity from federal reserve bank	$ 732,400
FRB Discount Window
Debt Instrument [Line Items]
Percent of qualifying assets (up to)	99%
Securities pledged as collateral	$ 220,700
Investment securities, pledged	$ 1,710,000
Number of securities pledged as collateral | securities	87
Mortgage Loans on Real Estate
Debt Instrument [Line Items]
Pledged as collateral, FHLB	$ 8,120,000	$ 8,080,000

Subordinated Debentures and C_3

Subordinated Debentures and Convertible Notes - Narrative (Details)		3 Months Ended		6 Months Ended
	Jun. 07, 2018 $ / shares	Jun. 30, 2023 USD ($) grantorTrust	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) grantorTrust	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Jun. 06, 2018 USD ($)
Subordinated Borrowing [Line Items]
Number of wholly owned subsidiary grantor trusts | grantorTrust		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		107,188,000		$ 107,188,000		$ 106,565,000
Interest on other borrowings and debt		3,149,000	$ 2,609,000	6,902,000	$ 4,942,000
Debt Instrument, Repurchased Face Amount				19,534,000	0
Gain on debt extinguishment		169,000		405,000	0
Repayment of Convertible Debt, Principal		9,200,000		19,900,000
Repayments of Debt				(197,107,000)	0
Other assets
Subordinated Borrowing [Line Items]
Investment in common trust securities		3,900,000		3,900,000		3,900,000
Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying value of Debentures		107,188,000		107,188,000		106,600,000
Remaining discounts on acquired Debentures		22,700,000		22,700,000		$ 23,300,000
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%		25%
Excess of percent threshold included in tier two capital		25%		25%
Convertible Notes
Subordinated Borrowing [Line Items]
Aggregate principal amount issued		$ 217,500,000		$ 217,500,000			$ 217,500,000
Interest rate							2%
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%
Repurchase or put option, percentage of principal amount in cash	100%
Interest expense on convertible notes		$ 598,000	$ 1,300,000	$ 1,900,000	$ 2,600,000
Number of outstanding years for which non-cash interest expense and issuance cost capitalization expense will be recorded		5 years		5 years		5 years

Subordinated Debentures and C_4

Subordinated Debentures and Convertible Notes - Summary of Trust Preferred Securities and Debentures (Details)	Jun. 30, 2023 USD ($) grantorTrust	Dec. 31, 2022 USD ($)
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 126,000,000
Carrying Value of Subordinated Debentures	$ 107,188,000	$ 106,565,000
Number of wholly owned subsidiary grantor trusts | grantorTrust	9
Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 126,000,000
Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 107,188,000	$ 106,600,000
Nara Capital Trust III
Subordinated Borrowing [Line Items]
Current Rate	8.702%
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 Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 5,155,000
Nara Statutory Trust IV
Subordinated Borrowing [Line Items]
Current Rate	8.11%
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 Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 5,155,000
Nara Statutory Trust V
Subordinated Borrowing [Line Items]
Current Rate	8.46%
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 Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 10,310,000
Nara Statutory Trust VI
Subordinated Borrowing [Line Items]
Current Rate	7.202%
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 Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 8,248,000
Center Capital Trust I
Subordinated Borrowing [Line Items]
Current Rate	8.11%
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 Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 15,065,000
Wilshire Trust II
Subordinated Borrowing [Line Items]
Current Rate	7.30%
Wilshire Trust II | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 20,000,000
Wilshire Trust II | Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 16,557,000
Wilshire Trust III
Subordinated Borrowing [Line Items]
Current Rate	6.952%
Wilshire Trust III | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 15,000,000
Wilshire Trust III | Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 11,825,000
Wilshire Trust IV
Subordinated Borrowing [Line Items]
Current Rate	6.932%
Wilshire Trust IV | Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 25,000,000
Wilshire Trust IV | Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 19,087,000
Saehan Capital Trust I
Subordinated Borrowing [Line Items]
Current Rate	7.158%
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 Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 15,786,000

Subordinated Debentures and C_5

Subordinated Debentures and Convertible Notes - Schedule of Convertible Debt (Details) - Convertible Notes - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Capitalization Period	5 years	5 years
Gross Carrying Amount
Convertible notes principal balance	$ 444	$ 217,500
Issuance costs to be capitalized	0	(4,119)
Carrying balance of convertible notes	444	213,381
Total Capitalization
Issuance costs to be capitalized	0	3,767
Carrying balance of convertible notes	0	3,767
Carrying Amount
Convertible notes principal balance	444	217,500
Issuance costs to be capitalized	0	(352)
Carrying balance of convertible notes	$ 444	$ 217,148

Derivative Financial Instrume_3

Derivative Financial Instruments - Summary of Derivative Notional Amounts and Fair Values (Details) - USD ($)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 3,000,720,000		$ 2,168,615,000
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	1,425,000,000		1,225,000,000
Interest rate contracts | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 925,000,000		614,000,000
Weighted-average term	2 years 9 months 18 days	4 years 1 month 6 days
Interest rate contracts | Correspondent Banks | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 1,589,746,000		1,013,407,000
Interest rate contracts | Customers | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	1,263,725,000		1,013,407,000
Interest Rate Swap, forward starting | Cash Flow Hedge | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount			111,000,000
Weighted-average term		3 years 10 months 24 days
Interest Rate Swap, forward starting | Interest Rate Cap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 500,000,000		500,000,000
Weighted-average term	3 years 6 months	3 years
Foreign Exchange Contract | Correspondent Banks | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 5,691,000		2,359,000
Foreign Exchange Contract | Customers | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	5,691,000		2,359,000
Risk participation agreement | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	132,117,000		134,282,000
Interest Rate Lock Commitments and Forward Contracts | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	3,750,000		2,801,000
Other assets | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	70,661,000		73,497,000
Other assets | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	0		25,383,000
Other assets | Interest rate contracts | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	0		19,773,000
Other assets | Interest rate contracts | Correspondent Banks | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	70,165,000		73,059,000
Other assets | Interest rate contracts | Customers | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	351,000		330,000
Other assets | Interest Rate Swap, forward starting | Cash Flow Hedge | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives			5,428,000
Other assets | Interest Rate Swap, forward starting | Interest Rate Cap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	0		182,000
Other assets | Foreign Exchange Contract | Correspondent Banks | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign exchange contracts	90,000		79,000
Other assets | Foreign Exchange Contract | Customers | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign exchange contracts	30,000		0
Other assets | Risk participation agreement | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	0		0
Other assets | Interest Rate Lock Commitments and Forward Contracts | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	25,000		29,000
Other liabilities | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	72,977,000		73,517,000
Other liabilities | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	4,812,000		2,055,000
Other liabilities | Interest rate contracts | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	0		1,227,000
Other liabilities | Interest rate contracts | Correspondent Banks | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	351,000		330,000
Other liabilities | Interest rate contracts | Customers | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	72,489,000		73,059,000
Other liabilities | Interest Rate Swap, forward starting | Cash Flow Hedge | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives			0
Other liabilities | Interest Rate Swap, forward starting | Interest Rate Cap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	4,812,000		828,000
Other liabilities | Foreign Exchange Contract | Correspondent Banks | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign exchange contracts	24,000		0
Other liabilities | Foreign Exchange Contract | Customers | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign exchange contracts	81,000		73,000
Other liabilities | Risk participation agreement | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	28,000		32,000
Other liabilities | Interest Rate Lock Commitments and Forward Contracts | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	$ 4,000		$ 23,000

Derivative Financial Instrume_4

Derivative Financial Instruments - Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) derivative	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) derivative	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) derivative
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$ (4,100,000)		$ (6,900,000)
Interest Expense	136,495,000	$ 16,286,000	239,294,000	$ 27,982,000
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	3,000,720,000		3,000,720,000		$ 2,168,615,000
Not Designated as Hedging Instrument | Other liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	$ 72,977,000		$ 72,977,000		$ 73,517,000
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivative instruments held	19		19		17
Notional Amount	$ 1,425,000,000		$ 1,425,000,000		$ 1,225,000,000
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	16,800,000		16,800,000
Risk participation agreement | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	132,117,000		132,117,000		134,282,000
Risk participation agreement | Not Designated as Hedging Instrument | Other liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	28,000		28,000		32,000
Interest rate contracts | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest Expense		(114,000)		$ (50,000)
Interest rate contracts | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 925,000,000		$ 925,000,000		$ 614,000,000
Weighted-average term			2 years 9 months 18 days	4 years 1 month 6 days
Interest rate contracts | Designated as Hedging Instrument | Cash Flow Hedge
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivative instruments held | derivative	17		17		13
Interest Rate Swap, forward starting | Designated as Hedging Instrument | Cash Flow Hedge
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivative instruments held | derivative					2
Notional Amount					$ 111,000,000
Weighted-average term				3 years 10 months 24 days
Interest Rate Swap, forward starting | Designated as Hedging Instrument | Interest Rate Cap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivative instruments held	2		2		2
Notional Amount	$ 500,000,000		$ 500,000,000		$ 500,000,000
Weighted-average term			3 years 6 months	3 years
Interest Rate Lock Commitments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	3,800,000		$ 3,800,000		2,800,000
Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on fair value of foreign exchange contracts	3,000	$ 0	9,000	$ 0
Cash Flow Hedge
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset	$ 9,100,000		$ 9,100,000		$ 9,100,000

Commitments and Contingencies_2

Commitments and Contingencies (Details) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Supply Commitment [Line Items]
Loss contingencies for all legal claims	$ 225,000	$ 229,000
Loss contingencies for all legal claims	225,000	229,000
Commitments to extend credit
Supply Commitment [Line Items]
Commitments and letters of credit	2,761,027,000	2,856,263,000
Standby letters of credit
Supply Commitment [Line Items]
Commitments and letters of credit	124,060,000	132,538,000
Other letters of credit
Supply Commitment [Line Items]
Commitments and letters of credit	52,674,000	22,376,000
Commitments to fund investments in affordable housing partnerships
Supply Commitment [Line Items]
Commitments and letters of credit	$ 9,322,000	$ 11,792,000

Goodwill, Intangible Assets, _3

Goodwill, Intangible Assets, and Servicing Assets - Intangible Assets (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 464,450,000		$ 464,450,000		$ 464,450,000
Goodwill impairment	0		0
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization expense related to core deposit intangible assets	448,000	$ 486,000	896,000	$ 973,000
Gross Amount	20,901,000		20,901,000		20,901,000
Accumulated Amortization	(16,071,000)		(16,071,000)		(15,175,000)
Carrying Amount	$ 4,830,000		$ 4,830,000		5,726,000
Foster Bankshares acquisition | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period	10 years		10 years
Gross Amount	$ 2,763,000		$ 2,763,000		2,763,000
Accumulated Amortization	(2,716,000)		(2,716,000)		(2,668,000)
Carrying Amount	$ 47,000		$ 47,000		95,000
Wilshire Bancorp acquisition | Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization Period	10 years		10 years
Gross Amount	$ 18,138,000		$ 18,138,000		18,138,000
Accumulated Amortization	(13,355,000)		(13,355,000)		(12,507,000)
Carrying Amount	$ 4,783,000		$ 4,783,000		$ 5,631,000

Goodwill, Intangible Assets, _4

Goodwill, Intangible Assets, and Servicing Assets - Servicing Assets (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of period	$ 11,628	$ 11,628	$ 10,874	$ 11,628	$ 10,418
Additions through originations of servicing assets	884		1,427	1,849	2,890
Amortization	(980)		(1,086)	(1,945)	(2,093)
Balance at end of period	11,532	$ 11,628	$ 11,215	11,532	$ 11,215
Principal balances of loans serviced for other institutions	$ 1,110,000			$ 1,110,000		$ 1,100,000
SBA Servicing Assets: Weighted-average discount rate		8.76%		10.46%
SBA Servicing Assets: Constant prepayment rate		12.09%		12.13%
Mortgage Servicing Assets: Weighted-average discount rate		11.38%		11.63%
Mortgage Servicing Assets: Constant prepayment rate		9.61%		9.51%

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income tax provision	$ 13,448	$ 18,631	$ 27,129	$ 39,882
Pretax income	$ 51,470	$ 70,719	$ 104,272	$ 152,708
Effective income tax rate	26.13%	26.35%	26.02%	26.12%
Unrecognized tax benefits	$ 1,800		$ 1,800		$ 3,000
Decrease in unrecognized tax benefits is reasonably possible	$ 1,200		$ 1,200

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value, Recurring (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Costs to sell percentage	8.50%
Assets:
Equity investments with readily determinable fair value	$ 42,963	$ 42,396
Recurring basis
Assets:
Equity investments with readily determinable fair value	4,303	4,303
Recurring basis | Designated as Hedging Instrument
Liabilities:
Derivative liabilities	4,945	2,160
Recurring basis | Interest rate contracts
Assets:
Derivative assets	70,516	73,389
Liabilities:
Derivative liabilities	72,840	73,389
Recurring basis | Mortgage banking derivatives
Assets:
Derivative assets	25	29
Liabilities:
Derivative liabilities	4	23
Recurring basis | Other derivatives
Assets:
Derivative assets	120	25,462
Liabilities:
Derivative liabilities	4,945	2,160
Recurring basis | Collateralized Mortgage Obligations [Member]
Assets:
Investment securities available for sale:	751,740	793,699
Recurring basis | Mortgage-backed securities: Residential
Assets:
Investment securities available for sale:	435,148	453,177
Recurring basis | Mortgage-backed securities: Commercial
Assets:
Investment securities available for sale:	352,851	368,287
Recurring basis | Corporate securities
Assets:
Investment securities available for sale:	18,572	18,857
Recurring basis | Municipal securities
Assets:
Investment securities available for sale:	200,792	182,752
Recurring basis | Asset-backed Securities
Assets:
Investment securities available for sale:	149,742	147,604
Recurring basis | US Treasury Notes Securities
Assets:
Investment securities available for sale:	3,904	3,886
Recurring basis | Agency Securities
Assets:
Investment securities available for sale:	3,837	3,867
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Equity investments with readily determinable fair value	4,303	4,303
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate contracts
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
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateralized Mortgage Obligations [Member]
Assets:
Investment securities available for sale:	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities: Residential
Assets:
Investment securities available for sale:	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities: Commercial
Assets:
Investment securities available for sale:	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate securities
Assets:
Investment securities available for sale:	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal securities
Assets:
Investment securities available for sale:	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed Securities
Assets:
Investment securities available for sale:	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | US Treasury Notes Securities
Assets:
Investment securities available for sale:	3,904	3,886
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Agency Securities
Assets:
Investment securities available for sale:	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) | Designated as Hedging Instrument
Liabilities:
Derivative liabilities		2,128
Recurring basis | Significant Other Observable Inputs (Level 2) | Interest rate contracts
Assets:
Derivative assets	70,516	73,389
Liabilities:
Derivative liabilities	72,840	73,389
Recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage banking derivatives
Assets:
Derivative assets	25	29
Liabilities:
Derivative liabilities	4	23
Recurring basis | Significant Other Observable Inputs (Level 2) | Other derivatives
Assets:
Derivative assets	120	25,462
Liabilities:
Derivative liabilities	4,917	2,128
Recurring basis | Significant Other Observable Inputs (Level 2) | Collateralized Mortgage Obligations [Member]
Assets:
Investment securities available for sale:	751,740	793,699
Recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities: Residential
Assets:
Investment securities available for sale:	435,148	453,177
Recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities: Commercial
Assets:
Investment securities available for sale:	352,851	368,287
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate securities
Assets:
Investment securities available for sale:	18,572	18,857
Recurring basis | Significant Other Observable Inputs (Level 2) | Municipal securities
Assets:
Investment securities available for sale:	199,862	181,809
Recurring basis | Significant Other Observable Inputs (Level 2) | Asset-backed Securities
Assets:
Investment securities available for sale:	149,742	147,604
Recurring basis | Significant Other Observable Inputs (Level 2) | US Treasury Notes Securities
Assets:
Investment securities available for sale:	0	0
Recurring basis | Significant Other Observable Inputs (Level 2) | Agency Securities
Assets:
Investment securities available for sale:	3,837	3,867
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 contracts
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
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	28	32
Recurring basis | Significant Unobservable Inputs (Level 3) | Collateralized Mortgage Obligations [Member]
Assets:
Investment securities available for sale:	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities: Residential
Assets:
Investment securities available for sale:	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities: Commercial
Assets:
Investment securities available for sale:	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Corporate securities
Assets:
Investment securities available for sale:	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Municipal securities
Assets:
Investment securities available for sale:	930	943
Recurring basis | Significant Unobservable Inputs (Level 3) | Asset-backed Securities
Assets:
Investment securities available for sale:	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | US Treasury Notes Securities
Assets:
Investment securities available for sale:	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | Agency Securities
Assets:
Investment securities available for sale:	$ 0	$ 0
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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 982	$ 1,029
Change in fair value included in other comprehensive income	(52)	(10)
Ending Balance	930	1,019	$ 930	$ 1,019
Other derivatives
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	35	61	32	93
Change in fair value included in other comprehensive income	(7)	(30)	(4)	(62)
Ending Balance	28	31	28	31
Municipal Bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance			943	1,038
Change in fair value included in other comprehensive income			(13)	(19)
Ending Balance	$ 930	$ 1,019	$ 930	$ 1,019

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets Measured at Fair Value, Non-Recurring (Details) - Non-recurring basis - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
CRE loans
Assets:
Assets	$ 4,285	$ 807
C&I loans
Assets:
Assets	21,195	2,744
OREO
Assets:
Assets		1,050
Loans held for sale, net
Assets:
Assets	46,042	48,795
Quoted Prices in Active Markets for Identical Assets (Level 1) | CRE loans
Assets:
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | C&I loans
Assets:
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | OREO
Assets:
Assets		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Loans held for sale, net
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | CRE loans
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | C&I loans
Assets:
Assets	0	0
Significant Other Observable Inputs (Level 2) | OREO
Assets:
Assets		0
Significant Other Observable Inputs (Level 2) | Loans held for sale, net
Assets:
Assets	46,042	48,795
Significant Unobservable Inputs (Level 3) | CRE loans
Assets:
Assets	4,285	807
Significant Unobservable Inputs (Level 3) | C&I loans
Assets:
Assets	21,195	2,744
Significant Unobservable Inputs (Level 3) | OREO
Assets:
Assets		1,050
Significant Unobservable Inputs (Level 3) | Loans held for sale, net
Assets:
Assets	$ 0	$ 0

Fair Value Measurements - Total

Fair Value Measurements - Total Net Gains Losses on Assets Measured at Fair Value on a Non-Recurring Basis (Details) - Change during period - Non-recurring basis - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Loans Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	$ 0	$ (371)	$ 0	$ (988)
Loans Receivable | CRE loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	(642)	(763)	(762)	(1,374)
Loans Receivable | C&I loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	(11,472)	(2,026)	(11,861)	(2,026)
OREO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gains (losses), fair value	$ 0	$ 0	$ (271)	$ (256)

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financial Assets:
Equity investments without readily determinable fair values	$ 38,700	$ 38,093
Financial Liabilities:
Amortized Cost	269,760	271,066
Fair Value	255,344	258,407
Level 1 | Carrying Amount
Financial Assets:
Cash and cash equivalents	2,302,339	506,776
Financial Liabilities:
Convertible notes	444	217,148
Level 1 | Estimated Fair Value
Financial Assets:
Cash and cash equivalents	2,302,339	506,776
Financial Liabilities:
Convertible notes	441	213,937
Level 2/3 | Carrying Amount
Financial Assets:
Accrued interest receivable	60,118	55,460
Level 2/3 | Estimated Fair Value
Financial Assets:
Accrued interest receivable	60,118	55,460
Level 2 | Carrying Amount
Financial Assets:
Interest earning deposits in other financial institutions		735
Equity investments without readily determinable fair values	38,660
Loans held for sale	49,246	49,245
Customers’ liabilities on acceptances	659	818
Financial Liabilities:
Noninterest bearing deposits	4,229,247	4,849,493
Savings and other interest bearing demand deposits	4,413,079	5,899,248
Time deposits	6,977,026	4,990,060
FHLB and FRB borrowings, Fair Value Disclosure	2,260,000
FHLB and FRB borrowings		865,000
Subordinated debentures	107,188	106,565
Accrued interest payable	109,236	26,668
Acceptances outstanding	659	818
Level 2 | Estimated Fair Value
Financial Assets:
Interest earning deposits in other financial institutions		733
Equity investments without readily determinable fair values	38,660	38,093
Loans held for sale	49,285	49,248
Customers’ liabilities on acceptances	659	818
Financial Liabilities:
Noninterest bearing deposits	4,229,247	4,849,493
Savings and other interest bearing demand deposits	4,413,079	5,899,248
Time deposits	7,007,072	5,020,093
FHLB and FRB borrowings, Fair Value Disclosure	2,253,222
FHLB and FRB borrowings		867,088
Subordinated debentures	104,804	107,944
Accrued interest payable	109,236	26,668
Acceptances outstanding	659	818
Level 3 | Carrying Amount
Financial Assets:
Loans receivable, net	14,691,814	15,241,181
Servicing assets, net	11,532	11,628
Level 3 | Estimated Fair Value
Financial Assets:
Loans receivable, net	14,164,650	14,745,881
Servicing assets, net	$ 16,814	$ 17,375

Stockholders' Equity - Discussi

Stockholders' Equity - Discussion of Equity (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Equity [Abstract]
Total stockholders’ equity	$ 2,067,998,000	$ 2,000,369,000	$ 2,067,998,000	$ 2,000,369,000	$ 2,058,580,000	$ 2,019,328,000	$ 2,041,057,000	$ 2,092,983,000
Share repurchase program, authorized amount	50,000,000		50,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 35,300,000		35,300,000
Repurchase of treasury stock			$ 0	$ 14,667,000
Dividends paid (in dollars per share)	$ 0.14	$ 0.14	$ 0.28	$ 0.28
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	$ (4,100,000)	$ 114,000	$ (6,900,000)	$ 50,000
Reclassification from AOCI, Debt Securities transferred from AFS to HTM amortization of unrealized losses, before tax	$ 806,000		$ 1,800,000	$ 76,000

Stockholders' Equity - Changes

Stockholders' Equity - Changes in Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 2,058,580	$ 2,041,057	$ 2,019,328	$ 2,092,983
Unrealized net (losses) gains on securities available for sale	(31,071)	(55,658)	144	(196,931)
Unrealized net losses on securities available for sale transferred to held to maturity	0	(36,576)	0	(36,576)
Unrealized net gains on interest rate contracts used for cash flow hedge	13,653	2,006	7,715	6,008
Reclassification adjustments for net (gains) losses realized in net income	(3,322)	(38)	(5,060)	26
Tax effect	6,113	26,724	(826)	67,178
Other comprehensive (loss) income, net of tax	(14,627)	(63,542)	1,973	(160,295)
Balance at end of period	2,067,998	2,000,369	2,067,998	2,000,369
Accumulated other comprehensive loss, net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(214,257)	(108,165)	(230,857)	(11,412)
Other comprehensive (loss) income, net of tax	(14,627)	(63,542)	1,973	(160,295)
Balance at end of period	$ (228,884)	$ (171,707)	$ (228,884)	$ (171,707)

Stock-Based Compensation - Plan

Stock-Based Compensation - Plan Description (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	May 23, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future grant (in shares)	0		0
Allocated share-based compensation expense	$ 3,400	$ 3,500	$ 5,700	$ 6,100
Tax benefit from compensation expense	$ 884	$ 912	$ 1,500	$ 1,600
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period			20,000
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%
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) - Stock options $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding - beginning of period (in shares) | shares	649,367
Granted (in shares) | shares	0
Exercised (in shares) | shares	0
Expired (in shares) | shares	(20,000)
Forfeited (in shares) | shares	0
Outstanding - end of period (in shares) | shares	629,367
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding - beginning of period, weighted-average exercise price per share (usd per share) | $ / shares	$ 16.63
Granted - weighted average exercise price (usd per share) | $ / shares	0
Exercised - weighted average exercise price (usd per share) | $ / shares	0
Expired - weighted-average exercise price per share (usd per share) | $ / shares	17.18
Forfeited - weighted average exercise price (usd per share) | $ / shares	0
Outstanding - end of period, weighted-average exercise price per share (usd per share) | $ / shares	$ 16.61
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options exercisable - end of period (in shares) | shares	629,367
Options exercisable, weighted-average exercise price per share (usd per share) | $ / shares	$ 16.61
Outstanding, weighted-average remaining contractual life (years)	2 years 4 months 24 days
Options exercisable, weighted-average remaining contractual life (years)	2 years 4 months 24 days
Outstanding, aggregate intrinsic value | $	$ 0
Options exercisable, aggregate intrinsic value | $	$ 0

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock and Performance Unit Activity (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Allocated share-based compensation expense	$ 3,400,000	$ 3,500,000	$ 5,700,000	$ 6,100,000
Tax benefit from compensation expense	884,000	912,000	1,500,000	1,600,000
Unrecognized compensation expense related to non-vested stock option grants	$ 0		$ 0
Restricted stock and performance units
Number of Shares
Outstanding - beginning of period (in shares)			1,760,373
Granted (in shares)			1,504,513
Vested (in shares)			(811,347)
Forfeited (in shares)			(126,041)
Outstanding - end of period (in shares)	2,327,498		2,327,498
Weighted-Average Grant Date Fair Value
Outstanding - beginning of period (in dollars per share)			$ 13.89
Granted (in dollars per share)			10.10
Vested (in dollars per share)			12.41
Forfeited (in dollars per share)			10.99
Outstanding - end of period (in dollars per share)	$ 12.11		$ 12.11
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			$ 8,000,000	9,400,000
Total compensation cost not yet recognized, period for recognition			1 year 10 months 28 days
Unrecognized compensation expense related to non-vested equity instruments other than options	$ 20,700,000		$ 20,700,000
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%
Maximum amount of common shares purchased under ESPP of employee's base salary, percent	20%		20%
Cap amount for shares purchased per employee			$ 25,000
Allocated share-based compensation expense		$ 34,000	$ 0	$ 234,000

Regulatory Matters (Details)

Regulatory Matters (Details) $ in Thousands	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Bank Subsidiary
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital, Actual Amount	$ 1,905,339	$ 2,049,973
Common equity Tier 1 capital, Actual Ratio	0.1146	0.1203
Total capital (to risk-weighted assets), Amount
Total capital, Actual	$ 2,065,091	$ 2,189,607
Tier I capital (to risk-weighted assets), Amount
Tier 1 capital, Actual	1,905,339	2,049,973
Tier I capital (to average assets), Amount
Tier 1 capital, Actual	$ 1,905,339	$ 2,049,973
Total capital and Tier I capital (to risk-weighted assets), Ratio
Total capital (to Risk Weighted Assets), Actual	0.1242	0.1285
Total capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes	0.0800	0.0800
Tier 1 capital (to Risk Weighted Assets), Actual	0.1146	0.1203
Tier 1 capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes	0.0600	0.0600
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)	0.0939	0.1094
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage)	0.0400	0.0400
Total capital (to Risk Weighted Assets), Required To Be Well Capitalized Under Prompt Corrective Action Provisions	0.1000	0.1000
Tier I Capital (to Average Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Leverage)	0.0500	0.0500
Company
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital, Actual Amount	$ 1,839,586	$ 1,799,020
Common equity Tier 1 capital, Actual Ratio	0.1105	0.1055
Total capital (to risk-weighted assets), Amount
Total capital, Actual	$ 2,102,625	$ 2,041,319
Tier I capital (to risk-weighted assets), Amount
Tier 1 capital, Actual	1,942,873	1,901,685
Tier I capital (to average assets), Amount
Tier 1 capital, Actual	$ 1,942,873	$ 1,901,685
Total capital and Tier I capital (to risk-weighted assets), Ratio
Total capital (to Risk Weighted Assets), Actual	0.1264	0.1197
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	0.1168	0.1115
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)	0.0957	0.1015
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage)	0.0400	0.0400
Bank
Total capital and Tier I capital (to risk-weighted assets), Ratio
Total capital (to Risk Weighted assets), Minimum Capital Adequacy With Capital Conservation Buffer	10.50%	10.50%
Tier 1 capital (to Risk Weighted Assets), Minimum Capital Adequacy With Capital Conservation Buffer	8.50%	8.50%
Common Equity Tier 1 | Company
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%	7%
Common Equity Tier 1 | Bank
Total capital and Tier I capital (to risk-weighted assets), Ratio
Tier 1 capital (to Risk Weighted Assets), Minimum Capital Adequacy With Capital Conservation Buffer	7%	7%
Common equity tier 1 capital | Bank Subsidiary
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), Required To Be Well Capitalized Under Prompt Corrective Action Provisions	0.0650	0.0650

Revenue Recognition - Service C

Revenue Recognition - Service Charged on Deposit Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	$ 2,325	$ 2,270	$ 4,546	$ 4,244
Wire transfer fees	850	858	1,623	1,758
Wire transfer fees
Disaggregation of Revenue [Line Items]
Wire transfer fees	733	770	1,386	1,489
Foreign exchange fees
Disaggregation of Revenue [Line Items]
Wire transfer fees	117	88	237	269
Noninterest Bearing Deposits
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	2,300	2,247	4,497	4,197
Noninterest Bearing Deposits | Monthly service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	241	249	486	501
Noninterest Bearing Deposits | Customer analysis charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	1,259	1,183	2,385	2,115
Noninterest Bearing Deposits | NSF charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	711	731	1,446	1,400
Noninterest Bearing Deposits | Other service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	89	84	180	181
Interest-bearing Deposits | Monthly service charges
Disaggregation of Revenue [Line Items]
Service fees on deposit accounts	$ 25	$ 23	$ 49	$ 47