East West Bancorp (EWBC) 10-K 28 Feb 25 2024 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2024	Jan. 31, 2025	Jun. 28, 2024
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	000-24939
Entity Registrant Name	EAST WEST BANCORP, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	95-4703316
Entity Address, Address Line One	135 North Los Robles Ave.
Entity Address, Address Line Two	7th Floor
Entity Address, City or Town	Pasadena
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	91101
City Area Code	626
Local Phone Number	768-6000
Title of 12(b) Security	Common stock, par value $0.001 per share
Trading Symbol	EWBC
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 10,044,106,703
Entity Common Stock, Shares Outstanding		138,439,815
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement to be filed with the Securities and Exchange Commission pursuant to Regulation 14A relating to its 2025 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K.
Entity Central Index Key	0001069157
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Amendment Flag	false

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2024
Auditor Information [Abstract]
Auditor Name	KPMG LLP
Auditor Location	Los Angeles, CA
Auditor Firm ID	185

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
ASSETS
Cash and due from banks	$ 360,734	$ 444,793
Interest-bearing cash with banks	4,890,008	4,170,191
Cash and cash equivalents	5,250,742	4,614,984
Interest-bearing deposits with banks	48,198	10,498
Securities purchased under resale agreements (“resale agreements”)	425,000	785,000
Debt securities:
Available-for-sale (“AFS”), at fair value (amortized cost of $11,505,775 and $6,916,491)	10,846,811	6,188,337
Held-to-maturity (“HTM”), at amortized cost (fair value of $2,387,754 and $2,453,971)	2,917,413	2,956,040
Loans held-for-sale	0	116
Loans held-for-investment (net of allowance for loan losses of $702,052 and $668,743)	53,024,585	51,542,039
Affordable housing partnership, tax credit and Community Reinvestment Act (“CRA”) investments, net	926,640	905,036
Premises and equipment (net of accumulated depreciation of $166,154 and $157,622)	82,233	86,370
Operating lease right-of-use assets	81,967	94,024
Goodwill	465,697	465,697
Other assets	1,907,189	1,964,743
TOTAL	75,976,475	69,612,884
Deposits:
Noninterest-bearing	15,450,428	15,539,872
Interest-bearing	47,724,595	40,552,566
Total deposits	63,175,023	56,092,438
Bank Term Funding Program (“BTFP”) borrowings	0	4,500,000
Federal Home Loan Bank (“FHLB”) advances	3,500,000	0
Long-term debt and finance lease liabilities	35,974	153,011
Operating lease liabilities	89,263	102,353
Accrued expenses and other liabilities	1,453,161	1,814,248
Total liabilities	68,253,421	62,662,050
COMMITMENTS AND CONTINGENCIES (Note 12)
STOCKHOLDERS’ EQUITY
Common stock, $0.001 par value, 200,000,000 shares authorized; 169,925,379 and 169,372,230 shares issued	170	169
Additional paid-in capital	2,030,712	1,980,818
Retained earnings	7,311,542	6,465,230
Treasury stock, at cost 31,488,080 and 29,344,863 shares	(1,034,110)	(874,787)
Accumulated other comprehensive loss (“AOCI”), net of tax	(585,260)	(620,596)
Total stockholders’ equity	7,723,054	6,950,834
TOTAL	$ 75,976,475	$ 69,612,884

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
ASSETS
AFS debt securities, amortized cost	$ 11,505,775	$ 6,916,491
HTM debt securities, fair value	2,387,754	2,453,971
Allowance for loan losses	702,052	668,743
Premises and equipment, accumulated depreciation	$ 166,154	$ 157,622
STOCKHOLDERS’ EQUITY
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	169,925,379	169,372,230
Treasury stock, shares (in shares)	31,488,080	29,344,863

CONSOLIDATED STATEMENT OF INCOM

CONSOLIDATED STATEMENT OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
INTEREST AND DIVIDEND INCOME
Loans receivable, including fees	$ 3,490,979	$ 3,172,746	$ 2,048,301
Debt securities	449,065	276,190	198,906
Assets purchased under resale agreements	11,254	20,164	29,767
Restricted equity securities	10,104	4,062	3,144
Interest-bearing cash and deposits with banks	231,794	220,643	41,113
Total interest and dividend income	4,193,196	3,693,805	2,321,231
INTEREST EXPENSE
Deposits	1,720,174	1,205,550	251,838
Federal funds purchased and other short-term borrowings	42,163	157,002	1,801
FHLB advances	147,269	6,430	1,754
Securities sold under repurchase agreements (“repurchase agreements”)	197	1,497	14,362
Long-term debt and finance lease liabilities	4,677	11,072	5,595
Total interest expense	1,914,480	1,381,551	275,350
Net interest income before provision for credit losses	2,278,716	2,312,254	2,045,881
Provision for credit losses	174,000	125,000	73,500
Net interest income after provision for credit losses	2,104,716	2,187,254	1,972,381
NONINTEREST INCOME
Deposit account fees	103,880	93,811	95,177
Lending fees	98,455	83,876	79,208
Foreign exchange income	54,605	48,276	41,416
Wealth management fees	38,627	26,994	27,738
Customer derivative income	16,401	20,200	29,057
Net gains on sales of loans	44	3,634	6,411
Net gains (losses) on AFS debt securities	2,069	(6,862)	1,306
Other investment income	5,611	9,348	7,037
Other income	15,526	15,987	11,316
Total noninterest income	335,218	295,264	298,666
NONINTEREST EXPENSE
Compensation and employee benefits	550,734	508,538	477,635
Occupancy and equipment expense	64,399	62,763	62,501
Deposit account expense	47,390	43,143	25,508
Computer and software related expenses	47,271	44,475	42,776
Deposit insurance premiums and regulatory assessments	45,736	103,308	19,449
Other operating expense	148,301	140,222	118,166
Amortization of tax credit and CRA investments	54,242	120,299	113,358
Total noninterest expense	958,073	1,022,748	859,393
INCOME BEFORE INCOME TAXES	1,481,861	1,459,770	1,411,654
Income tax expense	316,275	298,609	283,571
NET INCOME	$ 1,165,586	$ 1,161,161	$ 1,128,083
EARNINGS PER SHARE (“EPS”)
BASIC (in dollars per share)	$ 8.39	$ 8.23	$ 7.98
DILUTED (in dollars per share)	$ 8.33	$ 8.18	$ 7.92
WEIGHTED-AVERAGE NUMBER OF SHARES OUTSTANDING
BASIC (in shares)	138,898	141,164	141,326
DILUTED (in shares)	139,958	141,902	142,492

CONSOLIDATED STATEMENT OF COMPR

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 1,165,586	$ 1,161,161	$ 1,128,083
Other comprehensive income (loss), net of tax:
Net changes in unrealized gains (losses) on AFS debt securities	48,845	81,763	(508,799)
Reclassification of unrealized losses on debt securities transferred from AFS to HTM	0	0	(112,991)
Amortization of unrealized losses on debt securities transferred from ASF to HTM	10,884	11,171	12,678
Net changes in unrealized (losses) gains on cash flow hedges	(23,411)	52,155	(49,788)
Foreign currency translation adjustments	(982)	(56)	(16,348)
Other comprehensive income (loss)	35,336	145,033	(675,248)
COMPREHENSIVE INCOME	$ 1,200,922	$ 1,306,194	$ 452,835

CONSOLIDATED STATEMENT OF CHANG

CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment		Various Stock Compensation Plans And Agreements	Stock Repurchase Plan	Common Stock	Common Stock Various Stock Compensation Plans And Agreements	Common Stock Stock Repurchase Plan	Common Stock and Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment		Treasury Stock	Treasury Stock Various Stock Compensation Plans And Agreements	Treasury Stock Stock Repurchase Plan	AOCI, Net of Tax
Beginning balance (in shares) at Dec. 31, 2021						141,907,954
Beginning balance at Dec. 31, 2021	$ 5,837,218								$ 1,893,725	$ 4,683,659			$ (649,785)			$ (90,381)
Increase (Decrease) in Stockholders' Equity
Net income	1,128,083									1,128,083
Other comprehensive income (loss)	(675,248)															(675,248)
Issuance of common stock pursuant to various stock compensation plans and agreements (in shares)						671,871
Issuance of common stock pursuant to various stock compensation plans and agreements	42,832								42,832
Repurchase of common stock pursuant to the stock repurchase program/various stock compensation plans and agreements (in shares)							(246,462)	(1,385,517)
Repurchase of common stock pursuant to the stock repurchase program/various stock compensation plans and agreements				$ (19,087)	$ (99,990)									$ (19,087)	$ (99,990)
Cash dividends on common stock	(229,196)									(229,196)
Ending balance (in shares) at Dec. 31, 2022						140,947,846
Ending balance at Dec. 31, 2022	5,984,612	$ (4,262)	[1]						1,936,557	5,582,546	$ (4,262)	[1]	(768,862)			(765,629)
Increase (Decrease) in Stockholders' Equity
Net income	1,161,161									1,161,161
Other comprehensive income (loss)	145,033															145,033
Issuance of common stock pursuant to various stock compensation plans and agreements (in shares)						913,185
Issuance of common stock pursuant to various stock compensation plans and agreements	44,430								44,430
Repurchase of common stock pursuant to the stock repurchase program/various stock compensation plans and agreements (in shares)							(327,573)	(1,506,091)
Repurchase of common stock pursuant to the stock repurchase program/various stock compensation plans and agreements				(23,751)	(82,174)									(23,751)	(82,174)
Cash dividends on common stock	(274,215)									(274,215)
Ending balance (in shares) at Dec. 31, 2023						140,027,367
Ending balance at Dec. 31, 2023	6,950,834	$ (9,482)	[2]						1,980,987	6,465,230	$ (9,482)	[2]	(874,787)			(620,596)
Increase (Decrease) in Stockholders' Equity
Net income	1,165,586									1,165,586
Other comprehensive income (loss)	35,336															35,336
Issuance of common stock pursuant to various stock compensation plans and agreements (in shares)						553,149
Issuance of common stock pursuant to various stock compensation plans and agreements	49,895								49,895
Repurchase of common stock pursuant to the stock repurchase program/various stock compensation plans and agreements (in shares)							(199,871)	(1,943,346)
Repurchase of common stock pursuant to the stock repurchase program/various stock compensation plans and agreements				$ (14,877)	$ (144,446)									$ (14,877)	$ (144,446)
Cash dividends on common stock	(309,792)									(309,792)
Ending balance (in shares) at Dec. 31, 2024						138,437,299
Ending balance at Dec. 31, 2024	$ 7,723,054								$ 2,030,882	$ 7,311,542			$ (1,034,110)			$ (585,260)
[1] Represents the change in the Company’s allowance for loan losses as a result of the adoption of Accounting Standards Update (“ASU”) 2022-02 Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and the Vintage Disclosures on January 1, 2023. Represents the impact of the adoption of ASU 2023-02 Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method on January 1, 2024. Refer to Note 1 — Summary of Significant Accounting Policies to the Consolidated Financial Statements in this Annual Report on Form 10-K (“this Form 10-K”) for additional information.

CONSOLIDATED STATEMENT OF CHA_2

CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in dollars per share)	$ 2.20	$ 1.92	$ 1.60
Accounting Standards Update [Extensible List]		Accounting Standards Update 2023-02	Accounting Standards Update 2022-02

CONSOLIDATED STATEMENT OF CASH

CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,165,586	$ 1,161,161	$ 1,128,083
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	174,000	125,000	73,500
Depreciation and amortization	198,447	163,460	159,851
Amortization of premiums (accretion of discount), net	13,891	10,723	56,703
Stock compensation costs	45,535	39,867	37,601
Deferred income tax benefit	(14,283)	(49,139)	(43,988)
Net gains on sales of loans	(44)	(3,634)	(6,411)
Net (gains) losses on AFS debt securities	(2,069)	6,862	(1,306)
Impairment on other real estate owned (“OREO”) and other foreclosed assets	7,735	0	6,861
Net gains on sales of OREO and other foreclosed assets	(460)	(3,451)	(3,042)
Loans held-for-sale:
Originations	(2,881)	(116)	(447)
Proceeds from sales and paydowns/payoffs of loans originally classified as held-for-sale	3,020	0	461
Distributions received from equity method investees	5,645	11,282	7,586
Net change in accrued interest receivable and other assets	63,743	(146,270)	187,512
Net change in accrued expenses and other liabilities	(242,443)	105,304	461,385
Other operating activities, net	(3,755)	3,860	1,673
Total adjustments	246,081	263,748	937,939
Net cash provided by operating activities	1,411,667	1,424,909	2,066,022
Net (increase) decrease in:
Affordable housing partnership, tax credit and CRA investments	(378,305)	(228,550)	(167,303)
Interest-bearing deposits with banks	(38,352)	128,523	596,994
Assets purchased under resale agreements:
Proceeds from paydowns and maturities	360,000	219,917	1,951,388
Purchases	0	(212,725)	(390,077)
AFS debt securities:
Proceeds from sales	1,428,829	3,138	129,181
Proceeds from repayments, maturities and redemptions	1,547,058	1,470,819	896,726
Purchases	(7,599,454)	(1,549,846)	(1,070,608)
HTM debt securities:
Proceeds from repayments, maturities and redemptions	54,249	61,744	75,635
Purchases	0	0	(50,000)
Loans held-for-investment:
Proceeds from sales of loans originally classified as held-for-investment	715,088	711,862	602,725
Purchases	(1,000,637)	(600,930)	(657,620)
Other changes in loans held-for-investment, net	(1,341,549)	(4,166,572)	(6,516,182)
Proceeds from sales of OREO and other foreclosed assets	33,055	3,721	6,482
Distributions received from equity method investees	23,598	23,774	18,221
Purchases of FHLB stock, net	(84,079)	0	0
Other investing activities, net	(14,704)	(112,036)	(8,454)
Net cash used in investing activities	(6,295,203)	(4,247,161)	(4,582,892)
CASH FLOWS FROM FINANCING ACTIVITIES
Net change in deposits	7,108,377	144,468	2,709,427
Net change in short-term borrowings	(4,500,000)	4,500,000	6
FHLB advances:
Proceeds	4,000,400	6,000,000	4,950,200
Repayments	(500,400)	(6,000,000)	(5,200,200)
Repurchase agreements:
Repayment	0	(300,000)	0
Extinguishment cost	0	(3,872)	0
Long-term debt and lease liabilities:
Repayment of junior subordinated debt and lease liabilities	(117,437)	(871)	(943)
Common stock:
Proceeds from issuance pursuant to various stock compensation plans and agreements	3,023	3,208	3,178
Stock tendered for payment of withholding taxes	(14,877)	(23,751)	(19,087)
Repurchase of common stock pursuant to the stock repurchase program	(143,082)	(82,174)	(99,990)
Cash dividends paid	(308,478)	(274,554)	(228,381)
Net cash provided by financing activities	5,527,526	3,962,454	2,114,210
Effect of exchange rate changes on cash and cash equivalents	(8,232)	(7,002)	(28,491)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	635,758	1,133,200	(431,151)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	4,614,984	3,481,784	3,912,935
CASH AND CASH EQUIVALENTS, END OF YEAR	5,250,742	4,614,984	3,481,784
Cash paid during the year for:
Interest	2,057,967	1,213,319	249,587
Income taxes, net	246,945	291,685	281,269
Noncash investing and financing activities:
Loans transferred from held-for-investment to held-for-sale	659,322	739,379	623,777
Securities transferred from AFS to HTM debt securities	0	0	3,010,003
Loans transferred to OREO or other foreclosed assets	$ 67,379	$ 11,141	$ 270

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Organization East West Bancorp, Inc. (referred to herein on an unconsolidated basis as “East West” and on a consolidated basis as the “Company”) is a registered bank holding company that offers a full range of banking services to individuals and businesses through its subsidiary bank, East West Bank and its subsidiaries (“East West Bank” or the “Bank”). The Bank is the Company’s principal asset. As of December 31, 2024, the Company operated i n over 110 locations in the United States (“U.S.”) and Asia. In the U.S., the Bank’s corporate headquarters and main administrative offices are located in California, and its branches and offices are located in California, Texas, New York, Washington, Georgia, Massachusetts, Illinois, and Nevada. In Asia, East West’s presence included full-service branches in Hong Kong, Shanghai, Shantou and Shenzhen, representative offices in Beijing, Chongqing, Guangzhou, Xiamen and Singapore, and administrative support offices in Beijing and Shanghai. The Bank has a banking subsidiary based in China — East West Bank (China) Limited. Significant Accounting Policies Basis of Presentation — The accounting and reporting policies of the Company conform with the U.S. Generally Accepted Accounting Principles (“GAAP”), applicable guidelines prescribed by regulatory authorities and common practices in the banking industry. The preparation of the Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the Consolidated Financial Statements, income and expenses during the reporting period, and the related disclosures. Actual results could differ materially from those estimates. Certain items on the Consolidated Financial Statements and notes for the prior years have been reclassified to conform to the 2024 presentation. Principles of Consolidation — The Consolidated Financial Statements in this Form 10-K include the accounts of East West and its subsidiaries that are majority owned and in which the Company has a controlling financial interest, and variable interest entities (“VIE”) in which the Company has determined to be the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation. The Company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a VIE. Voting interest entities are entities that have sufficient equity and provide the equity investors voting rights that enable them to make significant decisions relating to the entity’s operations. VIEs are entities that, by design, either (1) lack sufficient equity to permit the entity to finance its activities without additional subordinated financial support from other parties, or (2) have equity investors that do not have the ability to make significant decisions relating to the entity’s operations through voting rights, or do not have the obligation to absorb the expected losses, or do not have the right to receive the residual returns of the entity. For a VIE, a controlling financial interest is where the Company has the power to direct the activities of an entity that most significantly impact the entity’s economic performance and has an obligation to absorb losses or the right to receive benefits from the VIE. If it is determined that the Company does not have a variable interest in the entity, no further analysis is required and the entity is not consolidated. The Variable Interest Model applies to all legal entities, including corporations, partnerships, limited liability companies and trusts. For an entity that does not meet the definition of a VIE, the entity is determined to be a voting interest entity. The Company consolidates a voting interest entity if it can exert control over the financial and operating policies of an investee, which can occur if the Company has a more than 50% voting interest in the entity. For unconsolidated voting interest entities or VIE, the Company uses the proportional amortization method (“PAM”), equity, cost or measurement alternative method based on the Company’s voting or economic interest. East West has one wholly-owned subsidiary that is a statutory business trust (the “Trust”). In accordance with the guidance in Financial Accounting Standards Board Accounting Standards Codification (“ASC”) Topic 810, Consolidation, the Trust has not been consolidated by the Company. Cash and Cash Equivalents — Cash and cash equivalents include cash on hand, cash items in transit, cash due from the Federal Reserve Bank (“FRB”) of San Francisco and other financial institutions, and federal funds sold with original maturities up to three months. Interest-Bearing Deposits with Banks — Interest-bearing deposits with banks include cash placed with other banks with original maturities greater than three months and less than one year. Assets Purchased under Resale Agreements and Securities Sold under Repurchase Agreements — Resale agreements are recorded as receivables based on the values at which the securities or loans are acquired. Repurchase agreements are accounted for as collateralized financing transactions and recorded as liabilities based on the values at which the securities are sold. The Company monitors the values of the underlying assets collateralizing the resale and repurchase agreements, including accrued interest, and obtains or posts additional collateral in order to maintain the appropriate collateral requirements for the transactions. For allowance for credit losses on resale agreements, refer to the Allowance for Collateral-Dependent Financial Assets section of this note for details. Debt Securities — Debt securities are recorded on the Consolidated Balance Sheet as of their trade dates. The Company initially classifies its debt securities as trading securities, AFS or HTM debt securities based on management’s intention on the date of the purchase. Debt securities are purchased for liquidity and investment purposes, as part of asset/liability management and other strategic activities. Debt securities for which the Company has the positive intention and ability to hold until maturity are classified as HTM and are carried at amortized cost, net of allowance for credit losses. Debt securities not classified as trading securities or HTM securities are classified as AFS. AFS debt securities are reported at fair value, net of the allowance for credit losses, with unrealized gains and losses recorded in AOCI, net of applicable income taxes. For details of the allowance for credit losses on debt securities, refer to the Allowance for Credit Losses on Available-for-Sale and Held-to-Maturity Debt Securities sections of this note. Interest income, including any amortization of premium or accretion of discount, is included in debt securities of interest and dividend income in the Company’s Consolidated Statement of Income. The Company recognizes realized gains and losses on the sale of AFS debt securities in earnings, using the specific identification method. Upon transfer of a debt security from the AFS to HTM category, the security’s new amortized cost is reset to fair value, reduced by any previous write-offs but excluding any allowance for credit losses. Unrealized gains or losses at the date of transfer of these securities continue to be reported in AOCI and are amortized into interest income over the remaining life of the securities as effective yield adjustments, in a manner consistent with the amortization or accretion of the original purchase premium or discount on the associated security. For transfers of securities from the AFS to HTM category, any allowance for credit losses that was previously recorded under the AFS model is reversed and an allowance for credit losses is subsequently recorded under the HTM debt security model. The reversal and re-establishment of the allowance for credit losses are recorded in the provision for credit losses. Equity Securities — The Company’s equity securities include both marketable and non-marketable equity securities. Marketable equity securities with readily determinable fair values are recorded at fair value with unrealized gains and losses due to changes in fair value; and are included in Other investment income on the Consolidated Statement of Income. Marketable equity securities include mutual fund investments, which are included in Affordable housing partnership, tax credit and CRA investments, net on the Consolidated Balance Sheet. Non-marketable equity securities including tax credit investments, and other equity investments that do not have readily determinable fair values are recorded in Affordable housing partnership, tax credit and CRA investments, net, and Other assets on the Consolidated Balance Sheet and are accounted for under one of the following accounting methods: • Equity Method — When the Company has the ability to exercise significant influence over the investee. • Cost Method — The cost method is applied to restricted equity securities held for membership and regulatory purposes, such as FRB of San Francisco and FHLB stock. These investments are held at their cost minus impairment. If impaired, the carrying value is written down to the fair value of the security. • Measurement Alternative — This method is applied to all remaining non-marketable equity securities. These securities are carried at cost adjusted for impairment, if any, plus or minus observable price changes in orderly transactions of an identical or similar security of the same issuer. The Company’s impairment review for equity method, cost method and measurement alternative securities typically includes an analysis of the facts and circumstances of each security, the intent or requirement to sell the security, the expectations of cash flows, capital needs and the viability of its business model. For equity and cost method investments, the Company reduces the asset’s carrying value when the Company considers declines in value to be other-than-temporary impairment (“OTTI”). For securities accounted for under the measurement alternative, the Company reduces the asset value when the fair value is less than the carrying value, without the consideration of recovery. Loans Held-for-Sale — Loans are initially classified as loans held-for-sale when they are individually identified as being available for immediate sale and management has committed to a formal plan to sell them. Loans held-for-sale are carried at lower of cost or fair value. Subject to periodic review under the Company’s evaluation process, including asset/liability and credit risk management, the Company may transfer certain loans from held-for-investment to held-for-sale measured at lower of cost or fair value. Any write-downs in the carrying amount of the loan at the date of transfer are recorded as charge-offs to allowance for loan losses. Loan origination fees on loans held-for-sale, net of certain costs in processing and closing the loans, are deferred until the time of sale and are included in the periodic determination of the lower of cost or fair value adjustments and/or the gain or loss recognized at the time of sale. A valuation allowance is established if the fair value of such loans is lower than their cost, with a corresponding charge to noninterest income. If the loan or a portion of the loan cannot be sold, it is subsequently transferred back to the loans held-for-investment portfolio from the loans held-for-sale portfolio at the lower of cost or fair value on the transfer date. Loans Held-for-Investment — At the time of commitment to originate or purchase a loan, the loan is determined to be held-for-investment if it is the Company’s intent to hold the loan to maturity or for the foreseeable future. Loans held-for-investment are stated at their outstanding principal, reduced by an allowance for loan losses and net of deferred loan fees or costs, or unearned fees on originated loans, net of unamortized premiums or unaccreted discounts on purchased loans. Nonrefundable fees and direct costs associated with the origination or purchase of loans are deferred and netted against outstanding loan balances. The deferred net loan fees and costs are recognized in interest income as an adjustment to yield over the loan term using the effective interest method. Discounts/premiums on purchased loans are accreted/amortized to interest income using the effective interest method over the remaining contractual maturity. Interest on loans is calculated using the simple-interest method on daily balances of the principal amounts outstanding. Generally, loans are placed on nonaccrual status when they become 90 days past due or more. Loans are considered past due when contractually required principal or interest payments have not been made on the due dates. Loans are also placed on nonaccrual status when management believes, after considering economic and business conditions and collection efforts, that the borrower’s financial condition is such that full collection of principal or interest becomes uncertain, regardless of the length of past due status. Once a loan is placed on nonaccrual status, interest accrual is discontinued and all unpaid accrued interest is reversed against interest income. Interest payments received on nonaccrual loans are reflected as a reduction of principal and not as interest income. A loan is returned to accrual status when the borrower has demonstrated a satisfactory payment trend subject to management’s assessment of the borrower’s ability to repay the loan. Loan Modifications — The Company applies the general loan modification guidance provided in ASC 310-20 to all loan modifications, including modifications made to borrowers experiencing financial difficulty. Under ASC 310-20-35-9 to 310-20-35-10, a modification is treated as a new loan only if the following two conditions are met: (1) the terms of the new loan are at least as favorable to the Company as the terms for comparable loans to other customers with similar collection risks; and (2) modifications to the terms of the original loan are more than minor. If either condition is not met, the modification is accounted for as a continuation of the existing loan with any effect of the modification treated as a prospective adjustment to the loan’s effective interest rate. A modification made to borrowers experiencing financial difficulty may vary by program and by borrower-specific characteristics, and may include rate reductions, principal forgiveness, term extensions, and payment delays, and is intended to minimize the Company’s economic loss and to avoid foreclosure or repossession of collateral. The Company applies the same credit loss methodology it uses for similar loans that were not modified. Troubled Debt Restructurings — Prior to the adoption of ASU 2022-02, a loan was generally classified as a troubled debt restructuring (“TDR”) when the Company, for economic or legal reasons related to the borrower’s financial difficulties, granted a concession to the borrower that the Company would not otherwise consider. The concessions may be granted in various forms, including a below-market change in the stated interest rate, a reduction in the loan balance or accrued interest, a term extension, a payment forbearance and other actions. Loans with contractual terms that were modified as a TDR and were current at the time of restructuring may remain on accrual status if there was demonstrated performance prior to the restructuring and payment in full under the restructured terms was expected. Otherwise, these loans were placed on nonaccrual status and were reported as nonperforming, until the borrower demonstrated a sustained period of performance, generally six months, and the ability to repay the loan according to the contractual terms. If accruing TDRs ceased to perform in accordance with their modified contractual terms, they were placed on nonaccrual status and reported as nonperforming TDRs. TDRs were included in the quarterly allowance for credit losses valuation process. Allowance for Loan Losses — The allowance for loan losses is established as management’s estimate of expected credit losses inherent in the Company’s lending activities; it is increased by the provision for credit losses and decreased by net charge-offs. The allowance for loan losses is evaluated quarterly by management based on regular reviews of the collectability of the Company’s loans, and more often if deemed necessary. The Company develops and documents the allowance for loan losses methodology at the portfolio segment level. The commercial loan portfolio is comprised of commercial and industrial (“C&I”), commercial real estate (“CRE”), multifamily residential, and construction and land loans; and the consumer loan portfolio is comprised of single-family residential, home equity lines of credit (“HELOCs”), and other consumer loans. The allowance for loan losses represents the portion of a loan’s amortized cost basis that the Company does not expect to collect due to anticipated credit losses over the loan’s contractual life, adjusted for prepayments. The Company measures the expected loan losses on a collective pool basis when similar risk characteristics exist. Models consisting of quantitative and qualitative components are designed for each pool to develop the expected credit loss estimates. Reasonable and supportable forecast periods vary by loan portfolio. The Company has adopted lifetime loss rate models for the portfolios, which use historical loss rates and forecast economic variables to calculate the expected credit losses for each loan pool. When loans do not share similar risk characteristics, the Company evaluates the loan for expected credit losses on an individual basis. Individually assessed loans include nonaccrual loans. The Company evaluates loans for expected credit losses on an individual basis if, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the original contractual terms of the loan agreement. The amortized cost of loans held-for-investment excludes accrued interest, which is included in Other assets on the Consolidated Balance Sheet. The Company has made an accounting policy election to not recognize an allowance for loan losses for accrued interest receivables as the Company reverses accrued interest if a loan is on nonaccrual status. The allowance for loan losses is reported separately on the Consolidated Balance Sheet and the Provision for credit losses is reported on the Consolidated Statement of Income. Allowance for Unfunded Credit Commitments — The allowance for unfunded credit commitments includes reserves provided for unfunded loan commitments, letters of credit, standby letters of credit (“SBLCs”) and recourse obligations for loans sold. The Company estimates the allowance for unfunded credit commitments over the contractual period in which the entity is exposed to credit risk via a present contractual obligation to extend credit. Within the period of credit exposure, the Company considers both the likelihood that funding will occur, and the expected credit losses on the commitments that are expected to fund over their estimated lives. The allowance for unfunded credit commitments is maintained at a level believed by management to be sufficient to absorb expected credit losses related to unfunded credit facilities. The determination of the adequacy of the allowance is based on periodic evaluations of the unfunded credit facilities. For all off-balance sheet instruments and commitments, the unfunded credit exposure is calculated using assumptions based on the Company's historical utilization experience in related portfolio segments. Loss rates are applied to the calculated exposure balances to estimate the allowance for unfunded credit commitments. Other elements such as credit risk factors for loans outstanding, terms and expiration dates of the unfunded credit facilities, and other pertinent information are considered to determine the adequacy of the allowance. The allowance for unfunded credit commitments is included in the Accrued expenses and other liabilities on the Consolidated Balance Sheet. Changes to the allowance for unfunded credit commitments are included in Provision for credit losses on the Consolidated Income Statements. Allowance for Credit Losses on Available-for-Sale Debt Securities — For each reporting period, each AFS debt security that is in an unrealized loss position is individually analyzed as part of the Company’s ongoing assessments to determine whether a fair value below the amortized cost basis has resulted from a credit loss or other factors. The initial indicator of impairment is a decline in fair value below the amortized cost of the AFS debt security, excluding accrued interest. The Company first considers whether there is a plan to sell the AFS debt security or it is more-likely-than-not that it will be required to sell the AFS debt security before recovery of the amortized cost. In determining whether an impairment is due to credit related factors, the Company considers the severity of the decline in fair value, nature of the security, the underlying collateral, the financial condition of the issuer, changes in the AFS debt security’s ratings and other qualitative factors. For AFS debt securities that are guaranteed or issued by the U.S. government, or government-sponsored enterprises of high credit quality, the Company applies a zero credit loss assumption. When the Company does not intend to sell the impaired AFS debt security and it is more-likely-than-not that the Company will not be required to sell the impaired debt security prior to recovery of its amortized cost basis, the credit component of the unrealized loss of the impaired AFS debt security is recognized as an allowance for credit losses, with a corresponding Provision for credit losses on the Consolidated Statement of Income and the non-credit component is recognized in Other comprehensive income (loss) on the Consolidated Statement of Comprehensive Income, net of applicable taxes. At each reporting period, the Company increases or decreases the allowance for credit losses as appropriate, while limiting reversals of the allowance for credit losses to the extent of the amounts previously recorded. If the Company intends to sell the impaired debt security or it is more-likely-than-not that the Company will be required to sell the impaired debt security prior to recovering its amortized cost basis, the entire impairment amount is recognized as an adjustment to the debt security’s amortized cost basis, with a corresponding Provision for credit losses on the Consolidated Statement of Income. The amortized cost of the Company’s AFS debt securities excludes accrued interest, which is included in Other assets on the Consolidated Balance Sheet. The Company has made an accounting policy election not to recognize an allowance for credit losses for accrued interest receivables on AFS debt securities as the Company reverses any accrued interest if a debt security is impaired. As each AFS debt security has a unique security structure, where the accrual status is clearly determined when certain criteria listed in the terms are met, the Company assesses the default status of each security as defined by the debt security’s specific security structure. Allowance for Credit Losses on Held-to-Maturity Debt Securities — For each major HTM debt security type, the allowance for credit losses is estimated collectively for groups of securities with similar risk characteristics. For securities that do not share similar risk characteristics, the losses are estimated individually. The Company applies a zero credit loss assumption to certain HTM debt securities, including debt securities that are either guaranteed or issued by the U.S. government or government-sponsored enterprises, are highly rated by nationally recognized statistical rating organizations (“NRSROs”), and have a long history of no credit losses. Any expected credit loss is recorded through the allowance for credit losses and deducted from the amortized cost basis of the security, reflecting the net amount the Company expects to collect. The amortized cost of the Company’s HTM debt securities excludes accrued interest, which is included in Other assets on the Consolidated Balance Sheet. The Company has made an accounting policy election not to recognize an allowance for credit losses for accrued interest receivables on HTM debt securities, as the Company reverses any accrued interest against interest income if a debt security is placed on nonaccrual status. The criteria used to place HTM debt securities on nonaccrual are largely similar to those described for loans. Any cash collected on nonaccrual HTM debt securities is applied to reduce the security’s amortized cost basis and not as interest income. Generally, the Company returns an HTM security to accrual status when all delinquent interest and principal become current under the contractual terms of the security, and the collectability of remaining principal and interest is no longer doubtful. Allowance for Collateral-Dependent Financial Assets — A financial asset is considered collateral-dependent if repayment is expected to be provided substantially through the operation or sale of the collateral. The allowance for credit losses is measured on an individual basis for collateral-dependent financial assets and determined by comparing the fair value of the collateral less the cost to sell, to the amortized cost basis of the related financial asset at the reporting date. Other than loans, collateral-dependent financial assets could also include resale agreements. In arrangements which the borrower must continually adjust the collateral securing the asset to reflect changes in the collateral’s fair value (e.g., resale agreements), the Company estimates the expected credit losses on the basis of the unsecured portion of the amortized cost as of the balance sheet date. If the fair value of the collateral is equal to or greater than the amortized cost of the resale agreement, the expected losses would be zero. If the fair value of the collateral is less than the amortized cost of the asset, the expected losses are limited to the difference between the fair value of the collateral and the amortized cost basis of the resale agreement. Allowance for Purchased Credit Deteriorated Assets — Purchased assets that have experienced a more-than-insignificant deterioration in credit quality since origination are deemed Purchased Credit Deteriorated (“PCD”) assets. For PCD HTM debt securities and PCD loans, the company records the allowance for credit losses by grossing up the initial amortized cost, which includes the purchase price and the allowance for credit losses. The expected credit losses of PCD debt securities are measured at the individual security level. The expected credit losses for PCD loans are measured based on the loan’s unpaid principal balance. Under this approach, there is no income statement impact from the acquisition. Subsequent changes in the allowance for credit losses on PCD assets will be recognized in Provision for credit losses on the Consolidated Statement of Income. The non-credit discount or premium will be accreted to interest income based on the effective interest rate on the PCD assets determined after the gross-up for the allowance for credit losses. Premises and Equipment, Net — The Company’s premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are computed based on the straight-line method over the estimated useful lives of the various classes of assets. The ranges of estimated useful lives for the principal classes of assets are as follows: Premises and Equipment Useful Lives Buildings 25 years Furniture, fixtures and equipment 7 years Leasehold improvements Term of lease or useful life, whichever is shorter The Company reviews its long-lived assets for impairment annually, or when events or changes in circumstances indicate that the carrying amounts of these assets may not be recoverable. An asset is considered impaired when the fair value, which is the expected undiscounted cash flows over the remaining useful life, is less than the net book value. The excess of the net book value over its fair value is charged as impairment loss to noninterest expense. Goodwill — Goodwill represents the excess of the purchase price over the fair value of net assets acquired in an acquisition. Goodwill is tested for impairment on an annual basis as of December 31, or more frequently as events occur or circumstances change that indicate a potential impairment at the reporting unit level. The Company assesses goodwill for impairment at each operating segment level. The Company organizes its operations into three reporting segments: (1) Consumer and Business Banking; (2) Commercial Banking; and (3) Treasury and Other. For information on how the reporting units are identified and the components are aggregated, see Note 17 — Business Segments to the Consolidated Financial Statements in this Form 10-K. The Company has the option to perform a qualitative assessment of goodwill or elect to bypass the qualitative test and proceed directly to a quantitative test. If the Company performs a qualitative assessment of goodwill to test for impairment and concludes it is more likely than not that a reporting unit’s fair value is greater than its carrying value, quantitative tests are not required. If the qualitative analysis indicates that it is more likely than not that a reporting unit’s fair value is less than its carrying value, the Company is required to perform a quantitative assessment to determine if there is goodwill impairment. Factors considered in the qualitative assessments include but are not limited to macroeconomic conditions, industry and market considerations, financial performance of the respective operating segment and other relevant entity- and reporting-unit specific considerations. A quantitative valuation involves determining the fair value of each reporting unit and comparing the fair value to its corresponding carrying value. Goodwill impairment loss is recorded as a charge to noninterest expense and an adjustment to the carrying value of goodwill. Subsequent reversals of goodwill impairment are not allowed. Derivatives — As part of its asset/liability management strategy, the Company uses derivative financial instruments to mitigate exposure to interest rate and foreign currency risks, and to assist customers with their risk management objectives. Derivatives utilized by the Company primarily include swaps, forwards and option contracts. Derivative instruments are included in Other assets or Accrued expenses and other liabilities on the Consolidated Balance Sheet at fair value. All derivatives designated as fair value hedges and hedges of the net investments in certain foreign operations are linked to specific hedged items or to groups of specific assets and liabilities on the Consolidated Balance Sheet. Cash flow hedges are linked to the forecasted transactions related to a recognized asset/liability or to groups of recognized assets/liabilities. The related cash flows impacts of derivatives are recognized on the Cash flows from operating activities section on the Consolidated Statement of Cash Flows. The Company uses accounting hedges based on the exposure being hedged as either fair value hedges, cash flow hedges or hedges of the net investments in certain foreign operations. For fair value hedges of interest rate risk, changes in fair value of derivatives are reported in the same line item where the earnings effect of the hedged item is presented, as Interest expense or Interest and dividend income on the Consolidated Statement of Income. Changes in fair value of derivatives designated as hedges of the net investments in foreign operations are recorded as a component of AOCI. For cash flow hedges of floating-rate interest payments or receipts, the change in the fair value of hedges is recognized in AOCI on the Consolidated Balance Sheet and reclassified to earnings in the same period when the hedged cash flows impact earnings. The changes in the fair value of the hedging instrument are recorded in the same income statement line item as the hedged item’s expense or income is recorded. For exampl

Fair Value Measurement and Fair

Fair Value Measurement and Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurement and Fair Value of Financial Instruments	Fair Value Measurement and Fair Value of Financial Instruments Under applicable accounting standards, the Company measures a portion of its assets and liabilities at fair value. These assets and liabilities are predominantly recorded at fair value on a recurring basis. From time to time, certain assets and liabilities are measured at fair value on a nonrecurring basis; that is, they are subject to fair value adjustments only as required through the application of an accounting method such as lower of cost or fair value or write-down of individual assets. The Company categorizes its assets and liabilities into three levels based on the established fair value hierarchy and conducts a review of fair value hierarchy classifications on a quarterly basis. For more information regarding the fair value hierarchy and how the Company measures fair value, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Fair Value to the Consolidated Financial Statements in this Form 10-K. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following section describes the valuation methodologies used by the Company to measure financial assets and liabilities on a recurring basis, as well as the general classification of these instruments within the fair value hierarchy. Available-for-Sale Debt Securities — The fair value of AFS debt securities is generally determined by independent external pricing service providers who have experience in valuing these securities or by taking the average quoted market prices obtained from independent external brokers. The valuations provided by the third-party pricing service providers are based on observable market inputs, which include benchmark yields, reported trades, issuer spreads, benchmark securities, bids, offers, prepayment expectations and reference data obtained from market research publications. Inputs used by the third-party pricing service providers in valuing collateralized mortgage obligations and other securitization structures also include newly issued data, monthly payment information, whole loan collateral performance, tranche evaluation and “To Be Announced” prices. In valuing securities issued by state and political subdivisions, inputs used by third-party pricing service providers also include material event notices. The valuations provided by the brokers incorporate information from their trading desks, research and other market data. On a monthly basis, the Company validates the valuations provided by third-party pricing service providers to ensure that the fair value determination is consistent with the applicable accounting guidance and the financial instruments are properly classified in the fair value hierarchy. To perform this validation, the Company evaluates the fair values of securities by comparing the fair values provided by the third-party pricing service providers to prices from other available independent sources for the same securities. When significant variances in prices are identified, the Company further compares the inputs used by different sources to ascertain the reliability of these sources. On a quarterly basis, the Company reviews the valuation inputs and methodology furnished by third-party pricing service providers for each security category. On an annual basis, the Company assesses the reasonableness of broker pricing by reviewing the related pricing methodologies. This review includes corroborating pricing with market data, performing pricing input reviews under current market-related conditions, and investigating security pricing by instrument as needed. When a quoted price in an active market exists for the identical security, this price is used to determine the fair value and the AFS debt security is classified as Level 1. Level 1 AFS debt securities consist of U.S. Treasury securities. When pricing is unavailable from third-party pricing service providers for certain securities, the Company requests market quotes from various independent external brokers and utilizes the average quoted market prices. In addition, the Company obtains market quotes from other official published sources. As these valuations are based on observable inputs in the current marketplace, they are classified as Level 2. Equity Securities — Equity securities consist of mutual funds and exchange-traded equity securities. The Company invested in these mutual funds for CRA purposes. The Company uses net asset value (“NAV”) information to determine the fair value of these equity securities. When NAV is available periodically and the equity securities can be put back to the transfer agents at the publicly available NAV, the fair value of the equity securities is classified as Level 1. When NAV is available periodically, but the equity securities may not be readily marketable at its periodic NAV in the secondary market, the fair value of these equity securities is classified as Level 2. Exchange-traded equity securities are measured based on quoted prices on an active exchange market, and classified as Level 1. Effective January 24, 2024, all of the outstanding shares of Visa B common stock (“Visa B shares”) were redenominated to Visa Class B-1 common stock (“Visa B-1 shares”). On April 8, 2024, Visa commenced an initial exchange offer for any and all outstanding Visa B-1 shares. In exchange for the Company’s 2,266 Visa B-1 shares, the Company received 1,133 Visa Class B-2 common stock (“Visa B-2 shares”) and 449 Visa Class C common stock (“Visa C shares”). The Visa B-2 shares remain subject to transfer restrictions and will continue to be held at cost. As the Visa C shares are convertible into Visa’s publicly traded Class A common stock (“Visa A shares”), the Company recognized the Visa C shares at fair value of $568 thousand based on the closing price of the Visa A shares as of December 31, 2024. Interest Rate Contracts — Interest rate contracts consist of interest rate swaps and options. The fair value of the interest rate swaps is determined using the market standard methodology of netting the discounted future fixed cash payments (or receipts) and the discounted expected variable cash receipts (or payments). The fair value of the interest rate options, which consist of floors and caps, is determined using the market standard methodology of discounting the future expected cash receipts that will occur if variable interest rates fall below (rise above) the strike rate of the floors (caps). In addition, to comply with the provisions of ASC 820, Fair Value Measurement , the Company incorporates credit valuation adjustments to appropriately reflect both its own and the respective counterparty’s nonperformance risk in the fair value measurements of its derivatives. The credit valuation adjustments associated with the Company’s derivatives utilize model-derived credit spreads, which are Level 3 inputs. Considering the observable nature of all other significant inputs utilized, the Company classifies these derivative instruments as Level 2. Foreign Exchange Contracts — The fair value of foreign exchange contracts is determined at each reporting period based on changes in the applicable foreign exchange rates. These are over-the-counter contracts where quoted market prices are not readily available. Valuation is measured using conventional valuation methodologies with observable market data. Due to the short-term nature of the majority of these contracts, the counterparties’ credit risks are considered nominal and result in no adjustments to the valuation of the foreign exchange contracts. Due to the observable nature of the inputs used in deriving the fair value of these contracts, the valuation of foreign exchange contracts is classified as Level 2. In addition, the Bank managed its foreign currency exposure in the net investment in its China subsidiary, East West Bank (China) Limited, a non-USD functional currency subsidiary, with foreign currency non-deliverable forward contracts. These foreign currency non-deliverable forward contracts were designated as net investment hedges. The fair value of foreign currency non-deliverable forward contracts is determined by comparing the contracted foreign exchange rate to the current market foreign exchange rate. Key inputs of the current market exchange rate include the spot and forward rates of the contractual currencies. Foreign exchange forward curves are used to determine which forward rate pertains to a specific maturity. Due to the observable nature of the inputs used in deriving the estimated fair value, these instruments are classified as Level 2. Credit Contracts — Credit contracts utilized by the Company are comprised of credit risk participation agreements (“RPAs”) between the Company and institutional counterparties. The fair value of the RPAs is calculated by determining the total expected asset or liability exposure of the derivatives to the borrowers and applying the borrowers’ credit spread to that exposure. Total expected exposure incorporates both the current and potential future exposure of the derivatives, derived from using observable inputs, such as yield curves and volatilities. Due to the observable nature of all other significant inputs used in deriving the estimated fair value, credit contracts are classified as Level 2. Equity Contracts — Equity contracts consist of warrants to purchase common or preferred stock of public and/or private companies, and any liability-classified contingently issuable shares of the Company. The fair value of the warrants is based on the Black-Scholes option pricing model. For warrants from public companies, the model uses the underlying stock price, stated strike price, warrant expiration date, risk-free interest rate based on a duration-matched U.S. Treasury rate, and market-observable company-specific equity volatility as inputs to value the warrants. Due to the observable nature of the inputs used in deriving the estimated fair value, warrants from public companies are classified as Level 2. For warrants from private companies, the model uses inputs such as the offering price observed in the most recent round of funding, stated strike price, warrant expiration date, risk-free interest rate based on duration-matched U.S. Treasury rate and equity volatility. The Company applies proxy volatilities based on the industry sectors of the private companies. The model values are then adjusted for a general lack of liquidity due to the private nature of the underlying companies. Since both equity volatility and liquidity discount assumptions are subject to management’s judgment, measurement uncertainty is inherent in the valuation of private company warrants. Due to the unobservable nature of the equity volatility and liquidity discount assumptions used in deriving the estimated fair value, warrants from private companies are classified as Level 3. On a quarterly basis, the changes in the fair value of warrants from private companies are reviewed for reasonableness, and a measurement of uncertainty analysis on the equity volatility and liquidity discount assumptions is performed. In connection with the Company’s acquisition of a 49.99% equity interest in Rayliant during the third quarter of 2023, the Company granted 349,138 performance-based RSUs as part of its consideration, in addition to $95 million in cash. The vesting of these equity contracts on September 1, 2028, is contingent on Rayliant meeting certain financial performance targets during the performance period. The fair value of liability-classified equity contracts varies based on the operating revenue and operating EBITDA of Rayliant to be achieved during the future performance period, and these performance-based RSUs are expected to vest into a variable number of the Company’s common stock, ranging from 20% to 200% of the target performance-based RSUs granted. Due to the unobservable nature of the input assumptions, these equity contracts are classified as Level 3. For additional information on the equity contracts, refer to Note 5 — Derivatives to the Consolidated Financial Statements in this Form 10-K. Commodity Contracts — Commodity contracts consist of swaps and options referencing commodity products. The fair value of the commodity option contracts is determined using the Black-Scholes model and assumptions that include expectations of future commodity price and volatility. The future commodity contract price is derived from observable inputs such as the market price of the commodity. Commodity swaps are structured as an exchange of fixed cash flows for floating cash flows. The fair value of the commodity swaps is determined using the market standard methodology of netting the discounted future fixed cash payments (or receipts) and the discounted expected variable cash receipts (or payments) based on the market prices of the commodity. The fixed cash flows are predetermined based on the known volumes and fixed price as specified in the swap agreement. The floating cash flows are correlated with the change of forward commodity prices, which is derived from market corroborated futures settlement prices. As a result, the Company classifies these derivative instruments as Level 2 due to the observable nature of the significant inputs utilized. The following tables present financial assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2024 and 2023: Assets and Liabilities Measured at Fair Value on a Recurring Basis ($ in thousands) Level 1 Level 2 Level 3 Total Fair Value AFS debt securities: U.S. Treasury securities $ 638,265 $ — $ — $ 638,265 U.S. government agency and U.S. government sponsored enterprise debt securities — 262,587 — 262,587 U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities (1) : Commercial mortgage-backed securities — 426,214 — 426,214 Residential mortgage-backed securities — 7,738,260 — 7,738,260 Municipal securities — 250,153 — 250,153 Non-agency mortgage-backed securities: Commercial mortgage-backed securities — 258,470 — 258,470 Residential mortgage-backed securities — 433,608 — 433,608 Corporate debt securities — 526,166 — 526,166 Foreign government bonds — 233,880 — 233,880 Asset-backed securities — 34,715 — 34,715 Collateralized loan obligations (“CLOs”) — 44,493 — 44,493 Total AFS debt securities $ 638,265 $ 10,208,546 $ — $ 10,846,811 Affordable housing partnership, tax credit and CRA investments, net: Equity securities $ 20,817 $ 4,204 $ — $ 25,021 Total affordable housing partnership, tax credit and CRA investments, net $ 20,817 $ 4,204 $ — $ 25,021 Other assets: Equity securities (2) $ 568 $ — $ — $ 568 Total other assets $ 568 $ — $ — $ 568 Derivative assets: Interest rate contracts $ — $ 385,311 $ — $ 385,311 Foreign exchange contracts — 89,083 — 89,083 Credit contracts — 1 — 1 Equity contracts — — 239 239 Commodity contracts — 48,499 — 48,499 Gross derivative assets $ — $ 522,894 $ 239 $ 523,133 Netting adjustments (3) $ — $ (427,292) $ — $ (427,292) Net derivative assets $ — $ 95,602 $ 239 $ 95,841 Derivative liabilities: Interest rate contracts $ — $ 414,172 $ — $ 414,172 Foreign exchange contracts — 71,254 — 71,254 Equity contracts (4) — — 15,119 15,119 Credit contracts — 12 — 12 Commodity contracts — 45,328 — 45,328 Gross derivative liabilities $ — $ 530,766 $ 15,119 $ 545,885 Netting adjustments (3) $ — $ (112,284) $ — $ (112,284) Net derivative liabilities $ — $ 418,482 $ 15,119 $ 433,601 Refer to footnotes on the following page. Assets and Liabilities Measured at Fair Value on a Recurring Basis ($ in thousands) Level 1 Level 2 Level 3 Total Fair Value AFS debt securities: U.S. Treasury securities $ 1,060,375 $ — $ — $ 1,060,375 U.S. government agency and U.S. government sponsored enterprise debt securities — 364,446 — 364,446 U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities (1) : Commercial mortgage-backed securities — 468,259 — 468,259 Residential mortgage-backed securities — 1,727,594 — 1,727,594 Municipal securities — 261,016 — 261,016 Non-agency mortgage-backed securities: Commercial mortgage-backed securities — 367,516 — 367,516 Residential mortgage-backed securities — 553,671 — 553,671 Corporate debt securities — 502,425 — 502,425 Foreign government bonds — 227,874 — 227,874 Asset-backed securities — 42,300 — 42,300 CLOs — 612,861 — 612,861 Total AFS debt securities $ 1,060,375 $ 5,127,962 $ — $ 6,188,337 Affordable housing partnership, tax credit and CRA investments, net: Equity securities $ 20,509 $ 4,150 $ — $ 24,659 Total affordable housing partnership, tax credit and CRA investments, net $ 20,509 $ 4,150 $ — $ 24,659 Derivative assets: Interest rate contracts $ — $ 473,907 $ — $ 473,907 Foreign exchange contracts — 57,072 — 57,072 Credit contracts — 1 — 1 Equity contracts — — 336 336 Commodity contracts — 79,604 — 79,604 Gross derivative assets $ — $ 610,584 $ 336 $ 610,920 Netting adjustments (3) $ — $ (312,792) $ — $ (312,792) Net derivative assets $ — $ 297,792 $ 336 $ 298,128 Derivative liabilities: Interest rate contracts $ — $ 433,936 $ — $ 433,936 Foreign exchange contracts — 42,564 — 42,564 Equity contract (4) $ — $ — $ 15,119 $ 15,119 Credit contracts — 25 — 25 Commodity contracts — 121,670 — 121,670 Gross derivative liabilities $ — $ 598,195 $ 15,119 $ 613,314 Netting adjustments (3) $ — $ (76,170) $ — $ (76,170) Net derivative liabilities $ — $ 522,025 $ 15,119 $ 537,144 (1) Includes Government National Mortgage Association (“GNMA”) AFS debt securities totaling $7.2 billion and $1.2 billion of fair value as of December 31, 2024 and 2023, respectively. (2) Consists of exchange-traded equity securities. For additional information, see Assets and Liabilities Measured at Fair Value on a Recurring Basis — Equity Securities in Note 2 — Fair Value Measurement and Fair Value of Financial Instruments in this Form 10-K. (3) Represents the balance sheet netting of derivative assets and liabilities and related cash collateral under master netting agreements or similar agreements. See Note 5 — Derivatives to the Consolidated Financial Statements in this Form 10-K for additional information. (4) Equity contracts classified as derivative liabilities consist of performance-based RSUs granted as part of EWBC’s consideration in its investment in Rayliant. For the years ended December 31, 2024, 2023 and 2022, Level 3 fair value measurements that were measured on a recurring basis consisted of warrant equity contracts issued by private companies and liability-classified contingently issuable shares of the Company. The following table provides a reconciliation of the beginning and ending balances of these equity contracts for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Derivative assets: Equity contracts Beginning balance $ 336 $ 323 $ 215 Total (losses) gains included in earnings (1) (97) (79) 17 Issuances — 92 91 Ending balance $ 239 $ 336 $ 323 Derivative liabilities: Equity contracts (2) Beginning balance $ 15,119 $ — $ — Issuances — 15,119 — Ending balance $ 15,119 $ 15,119 $ — (1) Includes unrealized (losses) gains recorded in Lending fees on the Consolidated Statement of Income. (2) Equity contracts classified as derivative liabilities consist of performance-based RSUs granted as part of EWBC’s consideration in its investment in Rayliant. The following table presents quantitative information about the significant unobservable inputs used in the valuation of Level 3 fair value measurements as of December 31, 2024 and 2023. The significant unobservable inputs presented in the table below are those that the Company considers significant to the fair value of the Level 3 assets. The Company considers unobservable inputs to be significant if, by their exclusion, the fair value of the Level 3 assets would be impacted by a predetermined percentage change. ($ in thousands) Fair Value Measurements (Level 3) Valuation Technique Unobservable Inputs Range of Inputs Weighted- Average of Inputs December 31, 2024 Derivative assets: Equity contracts $ 239 Black-Scholes option pricing model Equity volatility 38% — 57% 50% (1) Liquidity discount 47% 47% Derivative liabilities: Equity contracts (2) $ 15,119 Internal model Payout % designated based on operating revenue and operating EBITDA of investee 84% 84% December 31, 2023 Derivative assets: Equity contracts $ 336 Black-Scholes option pricing model Equity volatility 37% — 48% 45% (1) Liquidity discount 47% 47% Derivative liabilities: Equity contracts (2) $ 15,119 Internal model Payout % designated based on operating revenue and operating EBITDA of investee 84% 84% (1) Weighted-average of inputs is calculated based on the fair value of equity contracts as of December 31, 2024 and 2023. (2) Equity contracts classified as derivative liabilities consist of performance-based RSUs granted as part of EWBC’s consideration in its investment in Rayliant. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Assets measured at fair value on a nonrecurring basis include certain individually evaluated loans held-for-investment, investments in affordable housing partnership, tax credit and CRA investments, OREO, loans held-for-sale, and other nonperforming assets. Nonrecurring fair value adjustments result from the impairment on certain individually evaluated loans held-for-investment and investments in affordable housing partnership, tax credit and CRA investments, from the write-downs of OREO and other nonperforming assets, or from the application of lower of cost or fair value on loans held-for-sale. Individually Evaluated Loans Held-for-Investment — Individually evaluated loans held-for-investment are classified as Level 3 assets. The following two methods are used to derive the fair value of individually evaluated loans held-for-investment: • Discounted cash flow valuation techniques consist of developing an expected stream of cash flows over the life of the loans, and then calculating the present value of the loans by discounting the expected cash flows at a designated discount rate. • When the repayment of an individually evaluated loan is dependent on the sale of the collateral, the fair value of the loan is determined based on the fair value of the underlying collateral, which may take the form of real estate, inventory, equipment, contracts or guarantees. The fair value of the underlying collateral is generally based on third-party appraisals, or an internal valuation if a third-party appraisal is not required by regulations, or is unavailable. An internal valuation utilizes one or more valuation techniques such as the income, market and/or cost approaches. Loans Held-for-Sale — Loans held-for-investment subsequently transferred to held-for-sale are recorded at the lower of cost or fair value upon transfer. Loans held-for-sale may be measured at fair value on a nonrecurring basis when fair value is less than cost. Fair value is generally determined based on available market data for similar loans and therefore, loans held-for-sale are classified as Level 2. Affordable Housing Partnership, Tax Credit and CRA Investments, Net — The Company conducts due diligence and secures applicable internal and external approval on its affordable housing partnership, tax credit and CRA investments prior to closing the investment and initial funding. Subsequent to closing, the Company continues its periodic monitoring process to ensure that book values are realizable, investment is performing as expected and there is no significant tax credit recapture risk. This monitoring process includes reviewing the investment entity’s financial statements, production reports and a nnual tax returns, the annual financial statements of the sponsor and guarantor (if any) and a comparison of the actual performance to plan based on the final financial model at the time of closing. The Company assesses its tax credit and other investments for possible OTTI on an annual basis or when events or circumstances suggest that the carrying amount of the investments may not be realizable. These circumstances can include, but are not limited to the following factors: • expected future cash flows that are less than the carrying amoun t of the investment; • changes in the economic, market or technological environment that could adversely affect the investee’s operations; • the potential for tax credit recapture; and • other factors that raise doubt about the investee’s ability to continue as a going concern, such as negative cash flows from operations and the continuing prospects of the underlying operations of the investment. All available information is considered in assessing whether a decline in value is other-than-temporary. Generally, none of the aforementioned factors are individually conclusive and the relative importance placed on individual facts may vary depending on the situation. In accordance with ASC 323-10-35-32, Investments — Equity Method and Joint Ventures, an impairment charge would only be recognized in earnings for a decline in value that is determined to be other-than-temporary. Other Real Estate Owned — The Company’s OREO represents properties acquired through foreclosure, or through full or partial satisfaction of loans held-for-investment such as an acceptance of a deed-in-lieu of foreclosure. These OREO properties are recorded at estimated fair value less the costs to sell at the time of foreclosure or at the lower of cost or estimated fair value less the costs to sell subsequent to acquisition. On a monthly basis, the current fair market value of each OREO property is reviewed to ensure that the current carrying value is appropriate. OREO properties are classified as Level 3. Other Nonperforming Assets — Other nonperforming assets are recorded at fair value upon transfer from loans to foreclosed assets. Subsequently, foreclosed assets are recorded at the lower of carrying value or fair value. Fair value is based on independent market prices, appraised values of the collateral or management’s estimated recovery of the foreclosed asset. The Company records an impairment when the foreclosed asset’s fair value declines below its carrying value. The fair value measurement of other nonperforming assets is classified within one of the three levels in a valuation hierarchy based upon the observability of inputs to the valuation as of the measurement date. The following tables present the carrying amounts of assets that were still held and had fair value adjustments measured on a nonrecurring basis as of December 31, 2024 and 2023: Assets Measured at Fair Value on a Nonrecurring Basis ($ in thousands) Level 1 Level 2 Level 3 Fair Value Measurements Loans held-for-investment: Commercial: C&I $ — $ — $ 48,384 $ 48,384 CRE: CRE — — 1,678 1,678 Construction and land — — 11,316 11,316 Total commercial — — 61,378 61,378 Consumer: Residential mortgage: Single-family residential — — 108 108 Total consumer — — 108 108 Total loans held-for-investment $ — $ — $ 61,486 $ 61,486 Affordable housing partnership, tax credit and CRA investments, net $ — $ — $ 5,000 $ 5,000 OREO (1) $ — $ — $ 19,386 $ 19,386 (1) Represents the carrying value of OREO property that was written down subsequent to its initial classification as OREO and is included in Other assets on the Consolidated Balance Sheet. Assets Measured at Fair Value on a Nonrecurring Basis ($ in thousands) Level 1 Level 2 Level 3 Fair Value Measurements Loans held-for-investment: Commercial: C&I $ — $ — $ 22,035 $ 22,035 CRE: CRE — — 22,653 22,653 Total commercial — — 44,688 44,688 Consumer: Residential mortgage: HELOCs — — 1,204 1,204 Total consumer — — 1,204 1,204 Total loans held-for-investment $ — $ — $ 45,892 $ 45,892 Affordable housing partnership, tax credit and CRA investments, net $ — $ — $ 868 $ 868 The following table presents the change in the fair value of certain assets held at the end of the respective reporting periods, for which a nonrecurring fair value adjustment was recognized for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Loans held-for-investment: Commercial: C&I $ (43,754) $ (6,152) $ (25,996) CRE: CRE (78) (1,183) (7,098) Construction and land (2,289) — — Total CRE (2,367) (1,183) (7,098) Total commercial (46,121) (7,335) (33,094) Consumer: Residential mortgage: Single-family residential (1,392) — — HELOCs — (40) 166 Total residential mortgage (1,392) (40) 166 Total consumer (1,392) (40) 166 Total loans held-for-investment $ (47,513) $ (7,375) $ (32,928) Affordable housing partnership, tax credit and CRA investments, net $ (685) $ (1,140) $ 469 OREO $ (7,735) $ — $ — Other nonperforming assets $ — $ — $ (6,861) The following table presents the quantitative information about the significant unobservable inputs used in the valuation of Level 3 fair value measurements that are measured on a nonrecurring basis as of December 31, 2024 and 2023: ($ in thousands) Fair Value Measurements (Level 3) Valuation Techniques Unobservable Inputs Range of Inputs Weighted-Average of Inputs December 31, 2024 Loans held-for-investment $ 910 Fair value of collateral Discount 50% 50% $ 22,993 Fair value of collateral Contract value NM NM $ 37,583 Fair value of property Selling cost 8% — 20% 10% (1) Affordable housing partnership, tax credit and CRA investments, net $ 5,000 Individual analysis of each investment Expected future tax NM NM OREO $ 19,386 Fair value of property Selling cost 8% 8% December 31, 2023 Loans held-for-investment $ 16,328 Fair value of collateral Discount 15% — 75% 45% (1) $ 3,009 Fair value of collateral Contract value NM NM $ 26,555 Fair value of property Selling cost 8% 8% Affordable housing partnership, tax credit and CRA investments, net $ 868 Individual analysis of each investment Expected future tax NM NM NM - Not meaningful (1) Weighted-average of inputs is based on the relative fair value of the respective assets as of both December 31, 2024 and 2023. Disclosures about the Fair Value of Financial Instruments The following tables present the fair value estimates for financial instruments as of December 31, 2024 and 2023, excluding financial instruments recorded at fair value on a recurring basis as they are included in the tables presented elsewhere in this Note. The carrying amounts in the following tables are recorded on the Consolidated Balance Sheet under the indicated captions, except for accrued interest receivable, restricted equity securities, at cost, and mortgage servicing rights that are included in Other assets , and accrued interest payable which is included in Accrued expenses and other liabilities . These financial instruments are measured on an amortized cost basis on the Company’s Consolidated Balance Sheet. December 31, 2024 ($ in thousands) Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value Financial assets: Cash and cash equivalents $ 5,250,742 $ 5,250,742 $ — $ — $ 5,250,742 Interest-bearing deposits with banks $ 48,198 $ — $ 48,198 $ — $ 48,198 Resale agreements $ 425,000 $ — $ 329,769 $ — $ 329,769 HTM debt securities $ 2,917,413 $ 499,858 $ 1,887,896 $ — $ 2,387,754 Restricted equity securities, at cost $ 165,259 $ — $ 165,259 $ — $ 165,259 Loans held-for-investment, net $ 53,024,585 $ — $ — $ 51,328,254 $ 51,328,254 Mortgage servicing rights $ 5,234 $ — $ — $ 8,822 $ 8,822 Accrued interest receivable $ 316,392 $ — $ 316,392 $ — $ 316,392 Financial liabilities: Demand, checking, savings and money market deposits $ 39,959,251 $ — $ 39,959,251 $ — $ 39,959,251 Time deposits $ 23,215,772 $ — $ 23,225,317 $ — $ 23,225,317 FHLB advances $ 3,500,000 $ — $ 3,497,953 $ — $ 3,497,953 Long-term debt $ 32,001 $ — $ 31,246 $ — $ 31,246 Accrued interest payable $ 61,950 $ — $ 61,950 $ — $ 61,950 December 31, 2023 ($ in thousands) Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value Financial assets: Cash and cash equivalents $ 4,614,984 $ 4,614,984 $ — $ — $ 4,614,984 Interest-bearing deposits with banks $ 10,498 $ — $ 10,498 $ — $ 10,498 Resale agreements $ 785,000 $ — $ 699,056 $ — $ 699,056 HTM debt securities $ 2,956,040 $ 488,551 $ 1,965,420 $ — $ 2,453,971 Restricted equity securities, at cost $ 79,811 $ — $ 79,811 $ — $ 79,811 Loans held-for-sale $ 116 $ — $ 116 $ — $ 116 Loans held-for-investment, net $ 51,542,039 $ — $ — $ 50,256,565 $ 50,256,565 Mortgage servicing rights $ 6,602 $ — $ — $ 9,470 $ 9,470 Accrued interest receivable $ 331,490 $ — $ 331,490 $ — $ 331,490 Financial liabilities: Demand, checking, savings and money market deposits $ 38,048,974 $ — $ 38,048,

Securities Purchased under Resa

Securities Purchased under Resale Agreements	12 Months Ended
	Dec. 31, 2024
RESALE AND REPURCHASE AGREEMENTS [Abstract]
Securities Purchased under Resale Agreements	Securities Purchased under Resale Agreements The Company’s resale agreements expose it to credit risk from both the counterparties and the underlying collateral. The Company manages credit exposure from certain transactions by entering into master netting agreements and collateral arrangements with the counterparties. The relevant agreements allow for an efficient closeout of the transaction, liquidation and set-off of collateral against the net amount owed by the counterparty following a default. It is the Company’s policy to take possession, where possible, of the assets underlying resale agreements. As a result of the Company’s credit risk mitigation practices with respect to resale agreements as described above, the Company did not hold any reserves for credit impairment with respect to these agreements as of both December 31, 2024 and 2023. Total securities purchased under resale agreements were $425 million and $785 million as of December 31, 2024 and 2023, respectively. The weighted-average yields were 2.17%, 2.87% and 2.12% for the years ended December 31, 2024, 2023 and 2022, respectively. Balance Sheet Offsetting The Company’s resale and repurchase agreements are transacted under legally enforceable master netting agreements that, in the event of default by the counterparty, provide the Company the right to liquidate securities held and to offset receivables and payables with the same counterparty. The Company nets resale and repurchase transactions with the same counterparty on the Consolidated Balance Sheet when it has a legally enforceable master netting agreement and the transactions are eligible for netting under ASC 210-20-45-11, Balance Sheet Offsetting: Repurchase and Reverse Repurchase Agreements . Collateral received includes securities and loans that are not recognized on the Consolidated Balance Sheet. Collateral pledged consists of securities that are not netted on the Consolidated Balance Sheet against the related collateralized liability. Securities received or pledged as collateral in resale and repurchase agreements with other financial institutions may also be sold or re-pledged by the secured party, and are usually delivered to and held by third-party trustees. The following table presents the resale agreements included on the Consolidated Balance Sheet as of December 31, 2024 and 2023: Gross Amounts Not Offset on the Consolidated Balance Sheet ($ in thousands) Gross Amounts of Recognized Assets Gross Amounts Offset on the Consolidated Balance Sheet Net Amounts of Assets Presented on the Consolidated Balance Sheet Collateral Received (1) Net Amount Resale agreements as of December 31, 2024 $ 425,000 $ — $ 425,000 $ (329,603) $ 95,397 Resale agreements as of December 31, 2023 $ 785,000 $ — $ 785,000 $ (715,358) $ 69,642 (1) Represents the fair value of assets the Company has received under resale agreements, limited for table presentation purposes to the amount of the recognized asset due from each counterparty. The application of collateral cannot reduce the net position below zero. Therefore, excess collateral, if any, is not reflected above. In addition to the amounts included in the table above, the Company also has balance sheet netting related to derivatives. Refer to Note 5 — Derivatives to the Consolidated Financial Statements in this Form 10-K for additional information.

Securities

Securities	12 Months Ended
	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Securities	Securities The following tables present the amortized cost, gross unrealized gains and losses, and fair value by major categories of AFS and HTM debt securities as of December 31, 2024 and 2023: December 31, 2024 ($ in thousands) Amortized Cost (1) Gross Unrealized Gains Gross Unrealized Losses Fair Value AFS debt securities: U.S. Treasury securities $ 676,300 $ — $ (38,035) $ 638,265 U.S. government agency and U.S. government-sponsored enterprise debt securities 308,220 — (45,633) 262,587 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (2) : Commercial mortgage-backed securities 472,535 886 (47,207) 426,214 Residential mortgage-backed securities 7,974,768 12,278 (248,786) 7,738,260 Municipal securities 287,301 38 (37,186) 250,153 Non-agency mortgage-backed securities: Commercial mortgage-backed securities 294,235 2 (35,767) 258,470 Residential mortgage-backed securities 514,527 — (80,919) 433,608 Corporate debt securities 653,500 — (127,334) 526,166 Foreign government bonds 244,803 2,069 (12,992) 233,880 Asset-backed securities 35,086 — (371) 34,715 CLOs 44,500 — (7) 44,493 Total AFS debt securities 11,505,775 15,273 (674,237) 10,846,811 HTM debt securities U.S. Treasury securities 535,080 — (35,222) 499,858 U.S. government agency and U.S. government-sponsored enterprise debt securities 1,004,479 — (200,259) 804,220 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (3) : Commercial mortgage-backed securities 486,388 — (91,461) 394,927 Residential mortgage-backed securities 703,833 — (155,626) 548,207 Municipal securities 187,633 — (47,091) 140,542 Total HTM debt securities 2,917,413 — (529,659) 2,387,754 Total debt securities $ 14,423,188 $ 15,273 $ (1,203,896) $ 13,234,565 December 31, 2023 ($ in thousands) Amortized Cost (1) Gross Unrealized Gains Gross Unrealized Losses Fair Value AFS debt securities: U.S. Treasury securities $ 1,112,587 $ 101 $ (52,313) $ 1,060,375 U.S. government agency and U.S. government-sponsored enterprise debt securities 412,086 — (47,640) 364,446 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (2) : Commercial mortgage-backed securities 531,377 158 (63,276) 468,259 Residential mortgage-backed securities 1,956,927 380 (229,713) 1,727,594 Municipal securities 297,283 75 (36,342) 261,016 Non-agency mortgage-backed securities: Commercial mortgage-backed securities 409,578 — (42,062) 367,516 Residential mortgage-backed securities 643,335 — (89,664) 553,671 Corporate debt securities 653,501 — (151,076) 502,425 Foreign government bonds 239,333 69 (11,528) 227,874 Asset-backed securities 43,234 — (934) 42,300 CLOs 617,250 — (4,389) 612,861 Total AFS debt securities 6,916,491 783 (728,937) 6,188,337 HTM debt securities: U.S. Treasury securities 529,548 — (40,997) 488,551 U.S. government agency and U.S. government-sponsored enterprise debt securities 1,001,836 — (186,904) 814,932 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (3) : Commercial mortgage-backed securities 493,348 — (88,968) 404,380 Residential mortgage-backed securities 742,436 — (142,119) 600,317 Municipal securities 188,872 — (43,081) 145,791 Total HTM debt securities 2,956,040 — (502,069) 2,453,971 Total debt securities 9,872,531 783 (1,231,006) 8,642,308 (1) Amortized cost excludes accrued interest receivables, which are included in Other assets on the Consolidated Balance Sheet. As of December 31, 2024 and 2023, the accrued interest receivables were $45 million and $44 million, respectively. For the Company’s accounting policy related to debt securities’ accrued interest receivable, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Allowance for Credit Losses on Available-for-Sale Debt Securities and Allowance for Credit Losses on Held-to-Maturity Debt Securities to the Consolidated Financial Statements in this Form 10-K. (2) Includes GNMA AFS debt securities totaling $7.3 billion of amortized cost and $7.2 billion of fair value as of December 31, 2024, and $1.3 billion of amortized cost and $1.2 billion of fair value as of December 31, 2023. (3) Includes GNMA HTM debt securities totaling $86 million of amortized cost and $68 million of fair value as of December 31, 2024, and $92 million of amortized cost and $75 million of fair value as of December 31, 2023. Unrealized Losses of Available-for-Sale Debt Securities The following tables present the fair value and the associated gross unrealized losses of the Company’s AFS debt securities, aggregated by investment category and the length of time that the securities have been in a continuous unrealized loss position, as of December 31, 2024 and 2023: December 31, 2024 Less Than 12 Months 12 Months or More Total ($ in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses AFS debt securities: U.S. Treasury securities $ — $ — $ 638,265 $ (38,035) $ 638,265 $ (38,035) U.S. government agency and U.S. government-sponsored enterprise debt securities — — 262,587 (45,633) 262,587 (45,633) U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 2,741 (30) 377,756 (47,177) 380,497 (47,207) Residential mortgage-backed securities 2,719,228 (16,404) 1,528,252 (232,382) 4,247,480 (248,786) Municipal securities 2,763 (95) 245,360 (37,091) 248,123 (37,186) Non-agency mortgage-backed securities: Commercial mortgage-backed securities 10,767 (332) 235,668 (35,435) 246,435 (35,767) Residential mortgage-backed securities — — 433,608 (80,919) 433,608 (80,919) Corporate debt securities — — 526,166 (127,334) 526,166 (127,334) Foreign government bonds — — 87,008 (12,992) 87,008 (12,992) Asset-backed securities — — 34,715 (371) 34,715 (371) CLOs — — 44,493 (7) 44,493 (7) Total AFS debt securities $ 2,735,499 $ (16,861) $ 4,413,878 $ (657,376) $ 7,149,377 $ (674,237) December 31, 2023 Less Than 12 Months 12 Months or More Total ($ in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses AFS debt securities: U.S. Treasury securities $ — $ — $ 623,978 $ (52,313) $ 623,978 $ (52,313) U.S. government agency and U.S. government-sponsored enterprise debt securities — — 364,446 (47,640) 364,446 (47,640) U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities — — 463,572 (63,276) 463,572 (63,276) Residential mortgage-backed securities 9,402 (558) 1,661,112 (229,155) 1,670,514 (229,713) Municipal securities 2,825 (15) 254,773 (36,327) 257,598 (36,342) Non-agency mortgage-backed securities: Commercial mortgage-backed securities 2,742 (4) 364,774 (42,058) 367,516 (42,062) Residential mortgage-backed securities — — 553,671 (89,664) 553,671 (89,664) Corporate debt securities — — 502,425 (151,076) 502,425 (151,076) Foreign government bonds 110,955 (144) 88,616 (11,384) 199,571 (11,528) Asset-backed securities — — 42,300 (934) 42,300 (934) CLOs — — 612,861 (4,389) 612,861 (4,389) Total AFS debt securities $ 125,924 $ (721) $ 5,532,528 $ (728,216) $ 5,658,452 $ (728,937) As of December 31, 2024, the Company had 541 AFS debt securities in a gross unrealized loss position with no credit impairment, primarily consisting of 290 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities, 66 corporate debt securities, and 83 non-agency mortgage-backed securities. In comparison, as of December 31, 2023, the Company had 547 AFS debt securities in a gross unrealized loss position with no credit impairment, primarily consisting of 255 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities, 66 corporate debt securities, and 99 non-agency mortgage-backed securities. Allowance for Credit Losses on Available-for-Sale Debt Securities The Company evaluates each AFS debt security where the fair value declines below amortized cost. For a discussion of the factors and criteria the Company uses in analyzing securities for impairment related to credit losses, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Allowance for Credit Losses on Available-for-Sale Debt Securities to the Consolidated Financial Statements in this Form 10-K. The gross unrealized losses presented in the preceding tables were primarily attributable to interest rate movement and the widening of liquidity and/or credit spreads. U.S. Treasury, U.S. government agency, U.S. government-sponsored agency, and U.S. government-sponsored enterprise debt and mortgage-backed securities are issued, guaranteed, or otherwise supported by the U.S. government and have a zero credit loss assumption. The remaining securities that were in an unrealized loss position as of December 31, 2024 were mainly comprised of the following: • Corporate debt securities — The market value decline as of December 31, 2024 was primarily due to interest rate movement and spread widening. A portion of the corporate debt securities is comprised of subordinated debt securities issued by U.S. banks. Despite the reduction of the market value of these securities after the banking sector disruption in 2023, these securities are nearly all rated investment grade by NRSROs and issued by well-capitalized financial institutions with strong profitability. The contractual payments from these corporate debt securities have been and are expected to be received on time. The Company will continue to monitor the market developments in the banking sector and the credit performance of these securities. • Non-agency mortgage-backed securities — The market value decline as of December 31, 2024, was primarily due to interest rate movement and spread widening. Since these securities are rated investment grade by NRSROs, or have high priority in the cash flow waterfall within the securitization structure, and the contractual payments have historically been on time, the Company believes the risk of credit losses on these securities is low. As of both December 31, 2024 and 2023, the Company intended to hold the AFS debt securities with unrealized losses through the anticipated recovery period and it was more-likely-than-not that the Company would not have to sell these securities before the recovery of their amortized cost. The issuers of these securities have not, to the Company’s knowledge, established any cause for default on these securities. As a result, the Company expects to recover the entire amortized cost basis of these securities. Accordingly, there was no allowance for credit losses provided against these securities as of both December 31, 2024 and 2023. In addition, there was no provision for credit losses recognized for the years ended December 31, 2024, 2023, and 2022. Allowance for Credit Losses on Held-to-Maturity Debt Securities The Company separately evaluates its HTM debt securities for any credit losses using an expected loss model, similar to the methodology used for loans. For additional information on the Company’s credit loss methodology, refer to Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Allowance for Credit Losses on Held-to-Maturity Debt Securities to the Consolidated Financial Statements in this Form 10-K. The Company monitors the credit quality of the HTM debt securities using external credit ratings. As of December 31, 2024, all HTM securities were rated investment grade by NRSROs and issued, guaranteed, or supported by U.S. government entities and agencies. Accordingly, the Company applied a zero credit loss assumption and no allowance for credit losses was recorded as of December 31, 2024 and 2023. Overall, the Company believes that the credit support levels of the debt securities are strong and, based on current assessments and macroeconomic forecasts, expects that full contractual cash flows will be received. Realized Gains and Losses The following table presents the gross realized gains from the sales and impairment write-off of AFS debt securities and the related tax expense (benefit) included in earnings for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Gross realized gains from sales (1) $ 2,069 $ 3,138 $ 1,306 Impairment write-off (1) $ — $ (10,000) $ — Related tax expense (benefit) $ 612 $ (2,029) $ 386 (1) During 2023, the Company recognized $7 million in net losses on AFS securities as a component of Noninterest income in the Company’s Consolidated Statement of Income, consisting of a $10 million impairment write-off on a subordinated debt security, partially offset by a $3 million gain on the sale of the same security. Interest Income The following table presents the composition of interest income on debt securities for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Taxable interest $ 429,003 $ 255,475 $ 179,720 Nontaxable interest 20,062 20,715 19,186 Total interest income on debt securities $ 449,065 $ 276,190 $ 198,906 Contractual Maturities of Available-for-Sale and Held-to-Maturity Debt Securities The following tables present the contractual maturities, amortized cost, fair value and weighted average yields of AFS and HTM debt securities as of December 31, 2024. Expected maturities will differ from contractual maturities on certain securities as the issuers and borrowers of the underlying collateral may have the right to call or prepay obligations with or without prepayment penalties. ($ in thousands) Within One Year After One Year through Five Years After Five Years through Ten Years After Ten Years Total AFS debt securities: U.S. Treasury securities Amortized cost $ 84,143 $ 592,157 $ — $ — $ 676,300 Fair value 83,367 554,898 — — 638,265 Weighted-average yield (1) 2.23 % 1.06 % — % — % 1.21 % U.S. government agency and U.S. government-sponsored enterprise debt securities Amortized cost 17,972 27,030 201,546 61,672 308,220 Fair value 17,595 25,492 169,448 50,052 262,587 Weighted-average yield (1) 1.06 % 1.13 % 2.01 % 2.00 % 1.87 % U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities Amortized cost 8,037 54,584 125,704 8,258,978 8,447,303 Fair value 7,990 51,845 114,109 7,990,530 8,164,474 Weighted-average yield (1) (2) 3.24 % 2.89 % 2.79 % 5.13 % 5.07 % Municipal securities Amortized cost 5,657 26,502 8,114 247,028 287,301 Fair value 5,558 25,160 7,394 212,041 250,153 Weighted-average yield (1) (2) 2.25 % 2.14 % 3.38 % 2.23 % 2.25 % Non-agency mortgage-backed securities Amortized cost 39,936 7,671 6,220 754,935 808,762 Fair value 39,337 7,605 6,207 638,929 692,078 Weighted-average yield (1) 3.67 % 2.95 % 5.53 % 2.40 % 2.49 % Corporate debt securities Amortized cost — — 349,500 304,000 653,500 Fair value — — 311,947 214,219 526,166 Weighted average yield (1) — % — % 3.50 % 1.97 % 2.79 % Foreign government bonds Amortized cost 26,241 118,562 50,000 50,000 244,803 Fair value 26,305 120,567 49,743 37,265 233,880 Weighted-average yield (1) 3.24 % 2.22 % 5.01 % 1.50 % 2.75 % Asset-backed securities Amortized cost — — — 35,086 35,086 Fair value — — — 34,715 34,715 Weighted-average yield (1) — % — % — % 5.37 % 5.37 % CLOs Amortized cost — — 44,500 — 44,500 Fair value — — 44,493 — 44,493 Weighted average yield (1) — % — % 6.08 % — % 6.08 % Total AFS debt securities Amortized cost $ 181,986 $ 826,506 $ 785,584 $ 9,711,699 $ 11,505,775 Fair value $ 180,152 $ 785,567 $ 703,341 $ 9,177,751 $ 10,846,811 Weighted-average yield (1) 2.62 % 1.40 % 3.26 % 4.70 % 4.33 % ($ in thousands) Within One Year After One Year through Five Years After Five Years through Ten Years After Ten Years Total HTM debt securities: U.S. Treasury securities Amortized cost $ — $ 535,080 $ — $ — $ 535,080 Fair value — 499,858 — — 499,858 Weighted-average yield (1) — % 1.05 % — % — % 1.05 % U.S. government agency and U.S. government-sponsored enterprise debt securities Amortized cost — — 371,825 632,654 1,004,479 Fair value — — 316,243 487,977 804,220 Weighted-average yield (1) — % — % 1.89 % 1.90 % 1.90 % U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities Amortized cost — 3,663 94,280 1,092,278 1,190,221 Fair value — 3,371 80,374 859,389 943,134 Weighted-average yield (1) (2) — % 1.42 % 1.62 % 1.69 % 1.68 % Municipal securities Amortized cost — — — 187,633 187,633 Fair value — — — 140,542 140,542 Weighted-average yield (1) (2) — % — % — % 2.01 % 2.01 % Total HTM debt securities Amortized cost $ — $ 538,743 $ 466,105 $ 1,912,565 $ 2,917,413 Fair value $ — $ 503,229 $ 396,617 $ 1,487,908 $ 2,387,754 Weighted-average yield (1) — % 1.05 % 1.83 % 1.79 % 1.66 % (1) Weighted-average yields are computed based on amortized cost balances. (2) Yields on tax-exempt securities are not presented on a tax-equivalent basis. As of December 31, 2024 and 2023, AFS and HTM debt securities with carrying values of $5.4 billion and $7.0 billion, respectively, were pledged to secure borrowings, public deposits, repurchase agreements and for other purposes required or permitted by law. Restricted Equity Securities The following table presents the restricted equity securities included in Other assets on the Consolidated Balance Sheet as of December 31, 2024 and 2023: December 31, ($ in thousands) 2024 2023 FRB of San Francisco stock $ 63,930 $ 62,561 FHLB stock 101,329 17,250 Total restricted equity securities $ 165,259 $ 79,811

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives The Company uses derivative instruments to manage exposure to market risk, primarily interest rate and foreign currency risks, as well as to assist customers with their risk management objectives. The Company’s goal is to manage interest rate sensitivity and volatility to mitigate the effect of interest rate changes on earnings or capital. The Company also uses foreign exchange contracts to manage the foreign exchange rate risk associated with certain foreign currency-denominated assets and liabilities, as well as the Bank’s investment in East West Bank (China) Limited. The Company recognizes all derivatives on the Consolidated Balance Sheet at fair value. While the Company designates certain derivatives as hedging instruments in a qualifying hedge accounting relationship, other derivatives serve as economic hedges. For additional information on the Company’s derivatives and hedging activities, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Derivatives to the Consolidated Financial Statements in this Form 10-K. The following table presents the notional amounts and fair values of the Company’s derivatives as of December 31, 2024 and 2023. Certain derivative contracts are cleared though central clearing organizations where variation margin is applied daily as settlement to the fair values of the contracts. The fair values are presented on a gross basis prior to the application of bilateral collateral and master netting agreements, but after the application of variation margin payments as settlement to fair values of contracts cleared through central clearing organizations. Applying variation margin payments as settlement to the fair values of derivative contracts cleared through the London Clearing House (“LCH”) and the Chicago Mercantile Exchange (“CME”) resulted in reductions in the derivative asset and liability fair values of $17 million and $15 million, respectively, as of December 31, 2024. In comparison, applying variation margin payments as settlement to LCH- and CME-cleared derivative transactions resulted in reductions in both the derivative asset and liability fair values of $43 million as of December 31, 2023. Total derivative asset and liability fair values are adjusted to reflect the effects of legally enforceable master netting agreements and cash collateral received or paid. The resulting net derivative asset and liability fair values are included in Other assets and Accrued expenses and other liabilities , respectively, on the Consolidated Balance Sheet. December 31, 2024 December 31, 2023 Fair Value Fair Value ($ in thousands) Notional Amount Assets Liabilities Notional Amount Assets Liabilities Derivatives designated as hedging instruments: Cash flow hedges: Interest rate contracts $ 5,250,000 $ 5,647 $ 35,211 $ 5,250,000 $ 50,421 $ 13,124 Net investment hedges: Foreign exchange contracts — — — 81,480 3,394 — Total derivatives designated as hedging instruments $ 5,250,000 $ 5,647 $ 35,211 $ 5,331,480 $ 53,815 $ 13,124 Derivatives not designated as hedging instruments: Interest rate contracts $ 17,005,381 $ 379,664 $ 378,961 $ 17,387,909 $ 423,486 $ 420,812 Commodity contracts (1) — 48,499 45,328 — 79,604 121,670 Foreign exchange contracts 5,201,460 89,083 71,254 5,827,149 53,678 42,564 Credit contracts (2) 168,999 1 12 118,391 1 25 Equity contracts — 239 (3) 15,119 (4) — 336 (3) 15,119 (4) Total derivatives not designated as hedging instruments $ 22,375,840 $ 517,486 $ 510,674 $ 23,333,449 $ 557,105 $ 600,190 Gross derivative assets/liabilities $ 523,133 $ 545,885 $ 610,920 $ 613,314 Less: Master netting agreements (111,124) (111,124) (75,534) (75,534) Less: Cash collateral received/paid (316,168) (1,160) (237,258) (636) Net derivative assets/liabilities $ 95,841 $ 433,601 $ 298,128 $ 537,144 (1) The notional amount of the Company’s commodity contracts totaled 20,614 thousand barrels of crude oil and 406,726 thousand units of natural gas, measured in million British thermal units (“MMBTUs”) as of December 31, 2024. In comparison, the notional amount of the Company’s commodity contracts totaled 18,631 thousand barrels of crude oil and 328,844 thousand MMBTUs of natural gas as of December 31, 2023. (2) The notional amount for credit contracts reflects the Company’s pro-rata share of the notional amount in the derivative instruments in RPAs. (3) The Company held equity contracts in eight private companies and no public company as of December 31, 2024, and 11 private companies and one public company as of December 31, 2023. (4) Equity contracts classified as derivative liabilities consist of 349,138 performance-based RSUs granted as part of EWBC’s consideration in its investment in Rayliant. Derivatives Designated as Hedging Instruments Cash Flow Hedges — The Company uses interest rate swaps to hedge the variability in the interest amount received on certain floating-rate commercial loans, or paid on certain floating-rate borrowings due to changes in contractually specified interest rates. As of December 31, 2024, interest rate contracts with total notional amount of $5.3 billion were designated as cash flow hedges to convert certain variable-rate loans from floating-rate payments to fixed-rate payments. Gains and losses on the hedging derivative instruments are recognized in AOCI and reclassified to earnings in the same period the hedged cash flows impact earnings and within the same income statement line item as the hedged cash flows. Considering the interest rates, yield curve and notional amounts as of December 31, 2024, the Company expects to reclassify an estimated $11 million of after-tax net losses on derivative instruments designated as cash flow hedges from AOCI into earnings during the next 12 months. The following table presents the pre-tax changes in AOCI from cash flow hedges for the years ended December 31, 2024, 2023 and 2022. The after-tax impact of cash flow hedges on AOCI is shown in Note 15 — Accumulated Other Comprehensive (Loss) Income to the Consolidated Financial Statements in this Form 10-K. Year Ended December 31, ($ in thousands) 2024 2023 2022 Losses recognized in AOCI: Interest rate contracts $ (124,382) $ (5,767) $ (74,069) Gains (losses) reclassified from AOCI into earnings: Interest expense (for cash flow hedges on borrowings) $ — $ 696 $ 3,200 Interest and dividend income (for cash flow hedges on loans) (91,083) (82,153) (7,204) Noninterest income — 1,614 (1) — Total $ (91,083) $ (79,843) $ (4,004) (1) Represents the amounts in AOCI reclassified into earnings resulting from forecasted cash flows that were no longer probable to occur. Net Investment Hedges — The Company enters into foreign currency forward contracts to hedge a portion of the Bank’s investment in East West Bank (China) Limited, a non-USD functional currency subsidiary in China. The hedging instruments designated as net investment hedges were used to hedge against the risk of adverse changes in the foreign currency exchange rate of the RMB. The following table presents the pre-tax gains (losses) recognized in AOCI on net investment hedges for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Gains recognized in AOCI $ 586 $ 2,571 $ 4,509 Derivatives Not Designated as Hedging Instruments Customer-Related Positions and Economic Hedge Derivatives — The Company enters into interest rate, commodity, and foreign exchange derivatives at the request of its customers and generally enters into offsetting derivative contracts with third-party financial institutions to mitigate the inherent market risk. The Company also utilizes foreign exchange contracts to mitigate the effect of currency fluctuations on certain foreign currency-denominated on-balance sheet assets and liabilities, primarily foreign currency denominated deposits that it offers to its customers. A majority of the foreign exchange contracts had original maturities of one year or less as of both December 31, 2024 and 2023. The following table presents the notional amounts and the gross fair values of the interest rate and foreign exchange derivatives entered into with customers and with third-party financial institutions as economic hedges to customers’ positions as of December 31, 2024 and 2023: December 31, 2024 December 31, 2023 Fair Value Fair Value ($ in thousands) Notional Amount Assets Liabilities Notional Amount Assets Liabilities Customer-related positions: Interest rate contracts: Swaps $ 6,854,372 $ 11,828 $ 361,256 $ 6,835,822 $ 25,649 $ 377,388 Written options 1,458,428 — 4,953 1,522,531 — 12,756 Collars and corridors 181,039 80 440 322,732 440 4,481 Subtotal 8,493,839 11,908 366,649 8,681,085 26,089 394,625 Foreign exchange contracts: Forwards and spot 996,486 11,693 24,201 956,618 9,466 6,756 Swaps 1,504,469 16,117 25,366 1,588,491 5,801 18,118 Purchased options — — — 136,000 1,839 — Subtotal 2,500,955 27,810 49,567 2,681,109 17,106 24,874 Total $ 10,994,794 $ 39,718 $ 416,216 $ 11,362,194 $ 43,195 $ 419,499 Economic hedges: Interest rate contracts: Swaps $ 6,872,075 $ 362,323 $ 12,228 $ 6,861,561 $ 380,123 $ 25,731 Purchased options 1,458,428 4,990 — 1,522,531 12,783 — Collars and corridors 181,039 443 84 322,732 4,491 456 Subtotal 8,511,542 367,756 12,312 8,706,824 397,397 26,187 Foreign exchange contracts: Forwards and spot 86,750 2,318 1,738 148,003 292 94 Swaps 2,613,755 58,955 19,949 2,862,037 36,280 15,757 Written options — — — 136,000 — 1,839 Subtotal 2,700,505 61,273 21,687 3,146,040 36,572 17,690 Total $ 11,212,047 $ 429,029 $ 33,999 $ 11,852,864 $ 433,969 $ 43,877 The Company enters into energy commodity contracts with its customers in the oil and gas sector, which allow them to hedge against the risk of fluctuation in energy commodity prices. Offsetting contracts entered with third-party financial institutions are used as economic hedges to manage the Company’s exposure on its customer-related positions. December 31, 2024 December 31, 2023 Fair Value Fair Value (Amounts in thousands) Notional Units Assets Liabilities Notional Units Assets Liabilities Customer-related positions: Commodity contracts: Crude oil: Swaps 4,830 Barrels $ 4,682 $ 6,874 3,277 Barrels $ 3,735 $ 15,445 Collars 5,477 Barrels 1,604 3,362 5,966 Barrels 1,820 5,103 Subtotal 10,307 Barrels 6,286 10,236 9,243 Barrels 5,555 20,548 Natural gas: Swaps 141,736 MMBTUs 13,095 17,708 118,325 MMBTUs 438 73,793 Collars 62,045 MMBTUs 6,061 4,556 45,854 MMBTUs 21 20,400 Written options 1,234 MMBTUs 167 — 1,874 MMBTUs — 233 Subtotal 205,015 MMBTUs 19,323 22,264 166,053 MMBTUs 459 94,426 Total $ 25,609 $ 32,500 $ 6,014 $ 114,974 Economic hedges: Commodity contracts: Crude oil: Swaps 4,830 Barrels $ 4,479 $ 3,893 3,422 Barrels $ 9,166 $ 4,924 Collars 5,477 Barrels 1,547 76 5,966 Barrels 1,685 1,467 Subtotal 10,307 Barrels 6,026 3,969 9,388 Barrels 10,851 6,391 Natural gas: Swaps 139,136 MMBTUs 13,323 5,056 116,463 MMBTUs 49,941 305 Collars 61,341 MMBTUs 3,541 3,650 44,454 MMBTUs 12,565 — Purchased options 1,234 MMBTUs — 153 1,874 MMBTUs 233 — Subtotal 201,711 MMBTUs 16,864 8,859 162,791 MMBTUs 62,739 305 Total $ 22,890 $ 12,828 $ 73,590 $ 6,696 Credit Contracts — The Company periodically enters into credit RPAs with institutional counterparties to manage the credit exposure of the interest rate contracts associated with syndication loans. Under the RPAs, a portion of the credit exposure is transferred from one party (the purchaser of credit protection) to another party (the seller of credit protection). The seller of credit protection is required to make payments to the purchaser of credit protection if the underlying borrower defaults on the related interest rate contract. The Company may enter into protection sold or protection purchased RPAs. Credit risk on RPAs is managed by monitoring the credit worthiness of the borrowers and the institutional counterparties, and is a part of the Company’s normal credit review and monitoring process. Assuming the underlying borrowers referenced in the interest rate contracts defaulted, the maximum exposure of protection sold RPAs would be $170 thousand and $177 thousand as of December 31, 2024 and 2023, respectively. The following table presents the notional amounts and the gross fair values of RPAs sold and purchased outstanding as of December 31, 2024 and 2023: ($ in thousands) December 31, 2024 December 31, 2023 Notional Amount Fair Value Notional Amount Fair Value Assets Liabilities Assets Liabilities RPAs — protection sold (1) $ 133,174 $ — $ 12 $ 93,393 $ — $ 25 RPAs — protection purchased 35,825 1 — 24,998 1 — Total RPAs $ 168,999 $ 1 $ 12 $ 118,391 $ 1 $ 25 (1) All reference entities of the protection sold RPAs were investment grade. The weighted-average remaining maturities were 1.6 years and 2.8 years as of December 31, 2024 and 2023, respectively. Equity Contracts — As part of the loan origination process, the Company may obtain warrants to purchase the preferred and/or common stock of the borrowers’ companies, which are mainly in the technology and life sciences sectors. Warrants grant the Company the right to buy a certain class of the underlying company’s equity at a certain price before expiration. In connection with the Company’s investment in Rayliant during the third quarter of 2023, the Company granted performance-based RSUs as part of its consideration. The vesting of these equity contracts is contingent on Rayliant meeting certain financial performance targets during the future performance period. For additional information on these equity contracts, refer to Note 2 — Fair Value Measurement and Fair Value of Financial Instruments and Note 7 — Affordable Housing Partnership, Tax Credit and Community Reinvestment Act Investments, Net to the Consolidated Financial Statements in this Form 10-K. The following table presents the net gains (losses) due to fair value changes that are recognized on the Company’s Consolidated Statement of Income related to derivatives not designated as hedging instruments for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) Classification on Consolidated Statement of Income 2024 2023 2022 Derivatives not designated as hedging instruments: Interest rate contracts Customer derivative income $ 549 $ (2,989) $ 13,905 Foreign exchange contracts Foreign exchange income 54,073 52,817 13,799 Credit contracts Customer derivative income — (1) 118 Equity contracts - warrants Lending fees (97) 13 151 Commodity contracts Customer derivative income 929 (25) 48 Net gains $ 55,454 $ 49,815 $ 28,021 Credit-Risk-Related Contingent Features — Certain of the Company’s over-the-counter derivative contracts contain early termination provisions that require the Company to settle any outstanding balances upon the occurrence of a specified credit-risk-related event. Such an event primarily relates to a downgrade in the credit rating of East West Bank to below investment grade. As of December 31, 2024, the aggregate fair value amounts of all derivative instruments with credit risk-related contingent features that were in a net liability position totaled $1 million, for which $1 million collateral was posted to cover these positions. In comparison, as of December 31, 2023, the aggregate fair value amounts of all derivative instruments with credit risk-related contingent features that were in a net liability position totaled $9 thousand, for which no collateral was posted to cover these positions. In the event that the credit rating of East West Bank had been downgraded to below investment grade, minimal additional collateral would have been required to be posted as of both December 31, 2024 and 2023. Offsetting of Derivatives The following tables present the gross derivative fair values, the balance sheet netting adjustments, and the resulting net fair values recorded on the Consolidated Balance Sheet, as well as the cash and noncash collateral associated with master netting arrangements. The gross amounts of derivative assets and liabilities are presented after the application of variation margin payments as settlements to the fair values of contracts cleared through central counterparty clearing houses, where applicable. The collateral amounts in the following tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of over-collateralization are not shown: ($ in thousands) As of December 31, 2024 Gross Amounts Offset on the Consolidated Balance Sheet Net Amounts Presented on the Consolidated Balance Sheet Gross Amounts Not Offset on the Consolidated Balance Sheet Gross Amounts Recognized (1) Master Netting Arrangements Cash Collateral Received (3) Security Collateral Received (5) Net Amount Derivative assets $ 523,133 $ (111,124) $ (316,168) $ 95,841 $ (55,222) $ 40,619 Gross Amounts Offset on the Consolidated Balance Sheet Net Amounts Presented on the Consolidated Balance Sheet Gross Amounts Not Offset on the Consolidated Balance Sheet Gross Amounts Recognized (2) Master Netting Arrangements Cash Collateral Pledged (4) Security Collateral Pledged (5) Net Amount Derivative liabilities $ 545,885 $ (111,124) $ (1,160) $ 433,601 $ — $ 433,601 ($ in thousands) As of December 31, 2023 Gross Amounts Offset on the Consolidated Balance Sheet Net Amounts Presented on the Consolidated Balance Sheet Gross Amounts Not Offset on the Consolidated Balance Sheet Gross Amounts Recognized (1) Master Netting Arrangements Cash Collateral Received (3) Security Collateral Received (5) Net Amount Derivative assets $ 610,920 $ (75,534) $ (237,258) $ 298,128 $ (246,259) $ 51,869 Gross Amounts Offset on the Consolidated Balance Sheet Net Amounts Presented on the Consolidated Balance Sheet Gross Amounts Not Offset on the Consolidated Balance Sheet Gross Amounts Recognized (2) Master Netting Arrangements Cash Collateral Pledged (4) Security Collateral Pledged (5) Net Amount Derivative liabilities $ 613,314 $ (75,534) $ (636) $ 537,144 $ — $ 537,144 (1) Includes $4 million and $3 million of gross fair value assets with counterparties that were not subject to enforceable master netting arrangements or similar agreements as of December 31, 2024 and 2023, respectively. (2) Includes $27 million and $16 million of gross fair value liabilities with counterparties that were not subject to enforceable master netting arrangements or similar agreements as of December 31, 2024 and 2023, respectively. (3) Gross cash collateral received under master netting arrangements or similar agreements were $322 million and $244 million as of December 31, 2024 and 2023, respectively. Of the gross cash collateral received, $316 million and $237 million were used to offset against derivative assets as of December 31, 2024 and 2023, respectively. (4) Gross cash collateral pledged under master netting arrangements or similar agreements were $1 million as of both December 31, 2024 and 2023. Of the gross cash collateral pledged, $1 million cash collateral was used to offset against derivative liabilities as of both December 31, 2024 and 2023. (5) Represents the fair value of security collateral received or pledged limited to derivative assets or liabilities that are subject to enforceable master netting arrangements or similar agreements. U.S. GAAP does not permit the netting of noncash collateral on the Consolidated Balance Sheet but requires disclosure of such amounts. In addition to the amounts included in the tables above, the Company has balance sheet netting related to the resale and repurchase agreements. Refer to Note 3 — Securities Purchased under Resale Agreements to the Consolidated Financial Statements in this Form 10-K for additional information. Refer to Note 2 — Fair Value Measurement and Fair Value of Financial Instruments to the Consolidated Financial Statements in this Form 10-K for fair value measurement disclosures on derivatives.

Loans Receivable and Allowance

Loans Receivable and Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2024
Loans and Leases Receivable Disclosure [Abstract]
Loans Receivable and Allowance for Credit Losses	Loans Receivable and Allowance for Credit Losses The following table presents the composition of the Company’s loans held-for-investment outstanding as of December 31, 2024 and 2023: ($ in thousands) December 31, 2024 December 31, 2023 Commercial: C&I $ 17,397,158 $ 16,581,079 CRE: CRE 14,655,340 14,777,081 Multifamily residential 4,953,442 5,023,163 Construction and land 666,162 663,868 Total CRE 20,274,944 20,464,112 Total commercial 37,672,102 37,045,191 Consumer: Residential mortgage: Single-family residential 14,175,446 13,383,060 HELOCs 1,811,628 1,722,204 Total residential mortgage 15,987,074 15,105,264 Other consumer 67,461 60,327 Total consumer 16,054,535 15,165,591 Total loans held-for-investment (1) $ 53,726,637 $ 52,210,782 Allowance for loan losses (702,052) (668,743) Loans held-for-investment, net (1) $ 53,024,585 $ 51,542,039 (1) Includes $46 million and $71 million of net deferred loan fees and net unamortized premiums as of December 31, 2024 and 2023, respectively. Accrued interest receivable on loans held-for-investment was $255 million and $267 million as of December 31, 2024 and 2023, respectively, and was included in Other assets on the Consolidated Balance Sheet. The interest income reversed was insignificant for the years ended December 31, 2024, 2023 and 2022. For the Company’s accounting policy on accrued interest receivable related to loans held-for-investment, see Note 1 — Summary of Significant Accounting Policies — Loans Held-for-Investment to the Consolidated Financial Statements in this Form 10-K. The Company also has loans held-for-sale. For the Company’s accounting policy on loans held-for-sale, refer to Note 1 — Summary of Significant Accounting Policies — Loans Held-for-Sale to the Consolidated Financial Statements in this Form 10-K. The Company’s FRB and FHLB borrowings are primarily secured by loans held-for-investment. Loans held-for-investment totaling $38.2 billion and $37.2 billion, respectively, were pledged to secure borrowings and provide additional borrowing capacity as of December 31, 2024 and 2023. Credit Quality Indicators All loans are subject to the Company’s credit review and monitoring process. For the commercial loan portfolio, loans are risk rated based on an analysis of the borrower’s current payment performance or delinquency, repayment sources, financial and liquidity factors, including industry and geographic considerations. For the consumer loan portfolio, payment performance or delinquency is typically the driving indicator for risk ratings. The Company utilizes internal credit risk ratings to assign each individual loan a risk rating of 1 through 10: • Pass — loans risk rated 1 through 5 are assigned an internal risk rating category of “Pass.” Loans risk rated 1 are typically loans fully secured by cash. Pass loans have sufficient sources of repayment to repay the loan in full, in accordance with all terms and conditions. • Special mention — loans assigned a risk rating of 6 have potential weaknesses that warrant closer attention by management; these are assigned an internal risk rating category of “Special Mention.” • Substandard — loans assigned a risk rating of 7 or 8 have well-defined weaknesses that may jeopardize the full and timely repayment of the loan; these are assigned an internal risk rating category of “Substandard.” • Doubtful — loans assigned a risk rating of 9 have insufficient sources of repayment and a high probability of loss; these are assigned an internal risk rating category of “Doubtful.” • Loss — loans assigned a risk rating of 10 are uncollectible and of such little value that they are no longer considered bankable assets; these are assigned an internal risk rating category of “Loss.” Loan exposures categorized as criticized consist of special mention, substandard, doubtful and loss categories. The Company reviews the internal risk ratings of its loan portfolio on a regular basis, and adjusts the ratings based on changes in the borrowers’ financial status and the collectability of the loans. The following tables summarize the Company’s loans held-for-investment and year-to-date gross write-offs by loan portfolio segments, internal risk ratings and vintage year as of December 31, 2024 and 2023. The vintage year is the year of loan origination, renewal or major modification. Gross write-offs in the following tables are for the years ended December 31, 2024 and 2023. Revolving loans that are converted to term loans presented in the tables below are excluded from the term loans by vintage year columns. December 31, 2024 Term Loans by Origination Year ($ in thousands) 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted to Term Loans (1) Total Commercial: C&I: Pass $ 2,605,928 $ 1,508,948 $ 999,586 $ 612,015 $ 243,528 $ 295,884 $ 10,574,404 $ 23,032 $ 16,863,325 Criticized (accrual) 34,412 51,415 61,041 107,355 10,538 31,160 151,747 — 447,668 Criticized (nonaccrual) 3,822 29,181 20,273 10,666 3,225 9,135 9,863 — 86,165 Total C&I 2,644,162 1,589,544 1,080,900 730,036 257,291 336,179 10,736,014 23,032 17,397,158 Gross write-offs (2) 20 47,963 14,848 11,119 1,568 3,012 27,099 — 105,629 CRE: Pass 1,660,877 2,296,763 3,692,498 1,925,220 1,296,439 3,176,450 96,791 49,302 14,194,340 Criticized (accrual) 34,543 44,557 90,105 31,615 75,578 167,401 — 14,771 458,570 Criticized (nonaccrual) — — — — 1,756 674 — — 2,430 Subtotal CRE 1,695,420 2,341,320 3,782,603 1,956,835 1,373,773 3,344,525 96,791 64,073 14,655,340 Gross write-offs (2) — — — — — 3 — — 3 Multifamily residential: Pass 386,743 521,754 1,337,599 752,230 613,115 1,242,586 14,640 1,253 4,869,920 Criticized (accrual) — — 43,997 32,042 — 2,911 — — 78,950 Criticized (nonaccrual) — — — — — 4,572 — — 4,572 Subtotal multifamily residential 386,743 521,754 1,381,596 784,272 613,115 1,250,069 14,640 1,253 4,953,442 Gross write-offs — — — — — 10 — — 10 Construction and land: Pass 90,926 328,803 184,792 41,932 — 8,393 — — 654,846 Criticized (nonaccrual) — — 11,316 — — — — — 11,316 Subtotal construction and land 90,926 328,803 196,108 41,932 — 8,393 — — 666,162 Gross write-offs — — 2,289 — — — — — 2,289 Total CRE 2,173,089 3,191,877 5,360,307 2,783,039 1,986,888 4,602,987 111,431 65,326 20,274,944 Total CRE gross write-offs (2) — — 2,289 — — 13 — — 2,302 Total commercial $ 4,817,251 $ 4,781,421 $ 6,441,207 $ 3,513,075 $ 2,244,179 $ 4,939,166 $ 10,847,445 $ 88,358 $ 37,672,102 Total commercial gross write-offs (2) $ 20 $ 47,963 $ 17,137 $ 11,119 $ 1,568 $ 3,025 $ 27,099 $ — $ 107,931 December 31, 2024 Term Loans by Origination Year ($ in thousands) 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted to Term Loans (1) Total Consumer: Residential mortgage: Single-family residential: Pass (3) $ 2,360,674 $ 2,762,921 $ 3,074,668 $ 2,079,323 $ 1,407,031 $ 2,437,446 $ — $ — $ 14,122,063 Criticized (accrual) 4,175 3,409 750 5,810 1,548 6,069 — — 21,761 Criticized (nonaccrual) (3) 2,716 9,673 1,929 2,035 2,404 12,865 — — 31,622 Subtotal single-family residential mortgage 2,367,565 2,776,003 3,077,347 2,087,168 1,410,983 2,456,380 — — 14,175,446 Gross write-offs (2) 9 — — — — — — — 9 HELOCs: Pass 7,453 3,288 4,071 3,236 7,570 8,152 1,648,337 99,488 1,781,595 Criticized (accrual) 1,436 — 1,420 — 135 2,064 2,338 594 7,987 Criticized (nonaccrual) 3,161 3,095 2,520 39 418 7,301 — 5,512 22,046 Subtotal HELOCs 12,050 6,383 8,011 3,275 8,123 17,517 1,650,675 105,594 1,811,628 Gross write-offs — 10 — — — — — 5 15 Total residential mortgage 2,379,615 2,782,386 3,085,358 2,090,443 1,419,106 2,473,897 1,650,675 105,594 15,987,074 Total residential mortgage gross write-offs (2) 9 10 — — — — — 5 24 Other consumer: Pass 14,916 — 22,992 132 — 6,800 22,555 — 67,395 Criticized (nonaccrual) — — — — — — 66 — 66 Total other consumer 14,916 — 22,992 132 — 6,800 22,621 — 67,461 Gross write-offs (2) — 3,000 — — — — 890 — 3,890 Total consumer $ 2,394,531 $ 2,782,386 $ 3,108,350 $ 2,090,575 $ 1,419,106 $ 2,480,697 $ 1,673,296 $ 105,594 $ 16,054,535 Total consumer gross write-offs (2) $ 9 $ 3,010 $ — $ — $ — $ — $ 890 $ 5 $ 3,914 Total loans held-for-investment: Pass $ 7,127,517 $ 7,422,477 $ 9,316,206 $ 5,414,088 $ 3,567,683 $ 7,175,711 $ 12,356,727 $ 173,075 $ 52,553,484 Criticized (accrual) 74,566 99,381 197,313 176,822 87,799 209,605 154,085 15,365 1,014,936 Criticized (nonaccrual) 9,699 41,949 36,038 12,740 7,803 34,547 9,929 5,512 158,217 Total $ 7,211,782 $ 7,563,807 $ 9,549,557 $ 5,603,650 $ 3,663,285 $ 7,419,863 $ 12,520,741 $ 193,952 $ 53,726,637 Total loans held-for-investment gross write-offs (2) $ 29 $ 50,973 $ 17,137 $ 11,119 $ 1,568 $ 3,025 $ 27,989 $ 5 $ 111,845 December 31, 2023 Term Loans by Origination Year ($ in thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans Converted to Term Loans (1) Total Commercial: C&I: Pass $ 2,314,463 $ 1,628,560 $ 1,296,936 $ 331,982 $ 245,173 $ 164,159 $ 10,053,757 $ 20,143 $ 16,055,173 Criticized (accrual) 105,119 67,899 120,574 15,064 40,920 22,098 117,196 — 488,870 Criticized (nonaccrual) 2,104 7,916 131 4,819 2,979 18,137 950 — 37,036 Total C&I 2,421,686 1,704,375 1,417,641 351,865 289,072 204,394 10,171,903 20,143 16,581,079 Gross write-offs (2) 350 10,454 424 3,758 9,748 2,648 1,593 — 28,975 CRE: Pass 2,492,915 4,086,385 2,216,257 1,428,724 1,600,844 2,494,382 92,851 62,771 14,475,129 Criticized (accrual) 36,855 34,485 30,336 48,250 24,437 104,340 — — 278,703 Criticized (nonaccrual) — — — — 444 22,805 — — 23,249 Subtotal CRE 2,529,770 4,120,870 2,246,593 1,476,974 1,625,725 2,621,527 92,851 62,771 14,777,081 Gross write-offs (2) — — — — — 1,329 — — 1,329 Multifamily residential: Pass 665,780 1,481,161 808,333 612,408 498,491 857,713 8,690 1,281 4,933,857 Criticized (accrual) — 3,356 54,614 — 693 25,974 — — 84,637 Criticized (nonaccrual) — — — — — 4,669 — — 4,669 Subtotal multifamily residential 665,780 1,484,517 862,947 612,408 499,184 888,356 8,690 1,281 5,023,163 Gross write-offs — — — — — 3 — — 3 Construction and land: Pass 209,775 280,151 120,724 39,928 808 5,501 6,981 $ — 663,868 Subtotal construction and land 209,775 280,151 120,724 39,928 808 5,501 6,981 — 663,868 Total CRE 3,405,325 5,885,538 3,230,264 2,129,310 2,125,717 3,515,384 108,522 64,052 20,464,112 Total CRE gross write-offs (2) — — — — — 1,332 — — 1,332 Total commercial $ 5,827,011 $ 7,589,913 $ 4,647,905 $ 2,481,175 $ 2,414,789 $ 3,719,778 $ 10,280,425 $ 84,195 $ 37,045,191 Total commercial gross write-offs (2) $ 350 $ 10,454 $ 424 $ 3,758 $ 9,748 $ 3,980 $ 1,593 $ — $ 30,307 December 31, 2023 Term Loans by Origination Year ($ in thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans Converted to Term Loans (1) Total Consumer: Residential mortgage: Single-family residential: Pass (3) $ 3,188,830 $ 3,340,789 $ 2,279,802 $ 1,594,525 $ 980,686 $ 1,959,974 $ — $ — $ 13,344,606 Criticized (accrual) 2,680 4,471 566 1,440 1,503 4,167 — — 14,827 Criticized (nonaccrual) (3) 4,466 837 3,902 2,081 3,626 8,715 — — 23,627 Subtotal single-family residential mortgage 3,195,976 3,346,097 2,284,270 1,598,046 985,815 1,972,856 — — 13,383,060 HELOCs: Pass 3,641 3,882 1,734 3,153 729 9,251 1,551,074 126,280 1,699,744 Criticized (accrual) 565 1,219 1,872 101 185 1,470 2,548 1,089 9,049 Criticized (nonaccrual) 815 856 413 72 584 6,863 279 3,529 13,411 Subtotal HELOCs 5,021 5,957 4,019 3,326 1,498 17,584 1,553,901 130,898 1,722,204 Gross write-offs (2) — — — — — 41 — 6 47 Total residential mortgage 3,200,997 3,352,054 2,288,289 1,601,372 987,313 1,990,440 1,553,901 130,898 15,105,264 Total residential mortgage gross write-offs (2) — — — — — 41 — 6 47 Other consumer: Pass 2,286 18,098 135 — — 13,244 26,432 — 60,195 Criticized (nonaccrual) — — — — — — 132 — 132 Total other consumer 2,286 18,098 135 — — 13,244 26,564 — 60,327 Total consumer $ 3,203,283 $ 3,370,152 $ 2,288,424 $ 1,601,372 $ 987,313 $ 2,003,684 $ 1,580,465 $ 130,898 $ 15,165,591 Total consumer gross write-offs (2) $ — $ — $ — $ — $ — $ 41 $ — $ 6 $ 47 Total by Risk Rating: Pass $ 8,877,690 $ 10,839,026 $ 6,723,921 $ 4,010,720 $ 3,326,731 $ 5,504,224 $ 11,739,785 $ 210,475 $ 51,232,572 Criticized (accrual) 145,219 111,430 207,962 64,855 67,738 158,049 119,744 1,089 876,086 Criticized (nonaccrual) 7,385 9,609 4,446 6,972 7,633 61,189 1,361 3,529 102,124 Total $ 9,030,294 $ 10,960,065 $ 6,936,329 $ 4,082,547 $ 3,402,102 $ 5,723,462 $ 11,860,890 $ 215,093 $ 52,210,782 Total loans held-for-investment gross write-offs (2) $ 350 $ 10,454 $ 424 $ 3,758 $ 9,748 $ 4,021 $ 1,593 $ 6 $ 30,354 (1) $7 million of total commercial loans, comprised of CRE and C&I revolving loans, were converted to term loans during the year ended December 31, 2024. In comparison, $29 million and $26 million of total commercial loans, primarily comprised of CRE revolving loans, were converted to term loans during the years ended December 31, 2023 and 2022, respectively. During the years ended December 31, 2024 and 2023, respectively, $22 million and $44 million of total consumer loans, comprised of HELOCs, were converted to term loans. For the year ended December 31, 2022, no consumer loans were converted to term loans. (2) Excludes gross write-offs associated with loans the Company sold or settled. (3) As of each of December 31, 2024 and 2023, $1 million of nonaccrual loans whose payments were guaranteed by the Federal Housing Administration were classified with a “Pass” rating. Nonaccrual and Past Due Loans Loans that are 90 or more days past due are generally placed on nonaccrual status, unless the loan is well-collateralized and in the process of collection. Loans that are less than 90 days past due but have identified deficiencies, such as when the full collection of principal or interest becomes uncertain, are also placed on nonaccrual status. December 31, 2024 ($ in thousands) Current Accruing Loans Accruing Loans 30-59 Days Past Due Accruing Loans 60-89 Days Past Due Total Accruing Past Due Loans Total Nonaccrual Loans Total Loans Commercial: C&I $ 17,288,138 $ 5,690 $ 17,165 $ 22,855 $ 86,165 $ 17,397,158 CRE: CRE 14,647,270 3,755 1,885 5,640 2,430 14,655,340 Multifamily residential 4,947,939 653 278 931 4,572 4,953,442 Construction and land 653,919 927 — 927 11,316 666,162 Total CRE 20,249,128 5,335 2,163 7,498 18,318 20,274,944 Total commercial 37,537,266 11,025 19,328 30,353 104,483 37,672,102 Consumer: Residential mortgage: Single-family residential 14,088,086 32,841 22,096 54,937 32,423 14,175,446 HELOCs 1,770,218 11,396 7,968 19,364 22,046 1,811,628 Total residential mortgage 15,858,304 44,237 30,064 74,301 54,469 15,987,074 Other consumer 67,288 92 15 107 66 67,461 Total consumer 15,925,592 44,329 30,079 74,408 54,535 16,054,535 Total $ 53,462,858 $ 55,354 $ 49,407 $ 104,761 $ 159,018 $ 53,726,637 December 31, 2023 ($ in thousands) Current Accruing Loans Accruing Loans 30-59 Days Past Due Accruing Loans 60-89 Days Past Due Total Accruing Past Due Loans Total Nonaccrual Loans Total Loans Commercial: C&I $ 16,508,394 $ 28,550 $ 7,099 $ 35,649 $ 37,036 $ 16,581,079 CRE: CRE 14,750,315 1,719 1,798 3,517 23,249 14,777,081 Multifamily residential 5,017,897 597 — 597 4,669 5,023,163 Construction and land 650,617 13,251 — 13,251 — 663,868 Total CRE 20,418,829 15,567 1,798 17,365 27,918 20,464,112 Total commercial 36,927,223 44,117 8,897 53,014 64,954 37,045,191 Consumer: Residential mortgage: Single-family residential 13,313,455 29,285 15,943 45,228 24,377 13,383,060 HELOCs 1,687,301 12,266 9,226 21,492 13,411 1,722,204 Total residential mortgage 15,000,756 41,551 25,169 66,720 37,788 15,105,264 Other consumer 56,930 3,123 142 3,265 132 60,327 Total consumer 15,057,686 44,674 25,311 69,985 37,920 15,165,591 Total $ 51,984,909 $ 88,791 $ 34,208 $ 122,999 $ 102,874 $ 52,210,782 The following table presents the amortized cost of loans on nonaccrual status for which there was no related allowance for loan losses as of December 31, 2024 and 2023. Nonaccrual loans may not have an allowance for credit losses if the loan balances are well secured by collateral values and there is no loss expectation. ($ in thousands) December 31, 2024 December 31, 2023 Commercial: C&I $ 79,591 $ 33,089 CRE — 22,653 Multifamily residential 4,210 4,235 Construction and land 11,316 — Total commercial 95,117 59,977 Consumer: Single-family residential 6,279 4,852 HELOCs 15,380 7,256 Total consumer 21,659 12,108 Total nonaccrual loans with no related allowance for loan losses $ 116,776 $ 72,085 Foreclosed Assets The Company acquires assets from borrowers through loan restructurings, workouts, or foreclosures. Assets acquired may include real properties (e.g., real estate, land, and buildings) and commercial and personal properties. The Company recognizes foreclosed assets upon receiving assets in satisfaction of a loan (e.g., taking legal title or physical possession). Foreclosed assets, consisting of OREO and other nonperforming assets, are included in Other assets on the Consolidated Balance Sheet. The Company had $35 million of foreclosed assets as of December 31, 2024, compared with $11 million as of December 31, 2023. The Company commences the foreclosure process on consumer mortgage loans after a borrower becomes more than 120 days delinquent in accordance with the Consumer Financial Protection Bureau guidelines. The carrying value of the consumer real estate loans that were in an active or suspended foreclosure process was $16 million and $8 million as of December 31, 2024 and 2023, respectively. Loan Modifications to Borrowers Experiencing Financial Difficulty As part of the Company’s loss mitigation efforts, the Company may agree to modify the contractual terms of a loan to assist borrowers experiencing financial difficulty. The Company negotiates loan modifications on a case-by-case basis to achieve mutually agreeable terms that maximize loan collectability and meet the borrower’s financial needs. The Company considers various factors to identify borrowers experiencing financial difficulty. The primary factor for consumer borrowers is delinquency status. For commercial loan borrowers, these factors include credit risk ratings, the probability of loan risk rating downgrades, and overall risk profile changes. The modification may include, but is not limited to, payment delays, interest rate reductions, term extensions, principal forgiveness, or a combination of such modifications. Commercial loan borrowers that require immaterial modifications such as insignificant interest rate changes, short-term extensions (90 days or less) from the original maturity date, or temporary waivers or extensions of financial covenants which would not constitute material credit actions, are generally not considered to be experiencing financial difficulty and are not included in the disclosure. Insignificant payment deferrals (three months or less in the last 12 months) are also not included in the disclosure. The following tables present the amortized cost of loans that were modified during the years ended December 31, 2024 and 2023 by loan class and modification type: Year Ended December 31, 2024 Modification Type ($ in thousands) Term Extension Payment Delay Combination: Term Extension/ Payment Delay Combination: Rate Reduction/ Term Extension Combination: Rate Reduction/ Payment Delay Total Modification as a % of Loan Class Commercial: C&I $ 57,102 $ 26,420 $ — $ — $ — $ 83,522 0.48 % CRE 86,258 — — 6,052 — 92,310 0.63 % Total commercial 143,360 26,420 — 6,052 — 175,832 Consumer: Single-family residential — 15,397 222 — 140 15,759 0.11 % HELOCs — 14,303 — — 517 14,820 0.82 % Total consumer — 29,700 222 — 657 30,579 Total $ 143,360 $ 56,120 $ 222 $ 6,052 $ 657 $ 206,411 Year Ended December 31, 2023 Modification Type ($ in thousands) Term Extension Payment Delay Combination: Term Extension/ Payment Delay Combination: Rate Reduction/ Term Extension Combination: Rate Reduction/ Payment Delay Total Modification as a % of Loan Class Commercial: C&I $ 62,704 $ 6,842 $ — $ — $ — $ 69,546 0.42 % CRE 13,939 — — 32,470 — 46,409 0.31 % Total commercial 76,643 6,842 — 32,470 — 115,955 Consumer: Single-family residential — 10,202 3,967 — — 14,169 0.11 % HELOCs — 3,148 1,170 — 815 5,133 0.30 % Total consumer — 13,350 5,137 — 815 19,302 Total $ 76,643 $ 20,192 $ 5,137 $ 32,470 $ 815 $ 135,257 The following tables present the financial effects of the loan modifications for the years ended December 31, 2024 and 2023 by loan class and modification type: Financial Effects of Loan Modifications Year Ended December 31, 2024 ($ in thousands) Weighted-Average Interest Rate Reduction Weighted-Average Term Extension (in years) Weighted-Average Payment Delay Commercial: C&I — % 2.1 1.7 CRE 1.28 % 2.7 — Consumer: Single-family residential 1.63 % 10.0 1.3 HELOCs 0.25 % — 1.7 Financial Effects of Loan Modifications Year Ended December 31, 2023 ($ in thousands) Principal Forgiveness Weighted-Average Interest Rate Reduction Weighted-Average Term Extension (in years) Weighted-Average Payment Delay Commercial: C&I $ 371 (1) — % (1) 1.3 0.9 CRE — 3.00 % 2.1 — Consumer: Single-family residential — — % 9.3 1.8 HELOCs — 0.11 % 14.2 4.6 Total $ 371 (1) Comprised of C&I loans modified during the year ended December 31, 2023 where the interest rate was waived in addition to principal forgiveness. No recorded investment was outstanding as of December 31, 2023. A modified loan may become delinquent and may result in a payment default (generally 90 days past due) subsequent to modification. The following tables present information on loans that defaulted during the years ended December 31, 2024 and 2023 that received modifications during the 12 months preceding payment default. Loans Modified Subsequently Defaulted During the Year Ended December 31, 2024 ($ in thousands) Term Extension Payment Delay Combination: Rate Reduction/ Payment Delay Combination: Term Extension/ Payment Delay Total Commercial: C&I $ 3,684 $ 4,937 $ — $ — $ 8,621 Total commercial 3,684 4,937 — — 8,621 Consumer: Single-family residential — 10,223 141 2,462 12,826 HELOCs — 4,690 517 — 5,207 Total consumer — 14,913 658 2,462 18,033 Total $ 3,684 $ 19,850 $ 658 $ 2,462 $ 26,654 Loans Modified Subsequently Defaulted During the Year Ended December 31, 2023 ($ in thousands) Term Extension Payment Delay Combination: Rate Reduction/ Payment Delay Combination: Term Extension/ Payment Delay Total Consumer: Single-family residential $ — $ 267 $ — $ — $ 267 HELOCs — 749 — — 749 Total consumer — 1,016 — — 1,016 Total $ — $ 1,016 $ — $ — $ 1,016 The Company monitors the performance of modified loans to borrowers experiencing financial difficulty to understand the effectiveness of its modification efforts. The following table presents the performance of loans that were modified during the years ended December 31, 2024 and 2023, respectively. Payment Performance as of December 31, 2024 ($ in thousands) Current 30-89 Days Past Due 90+ Days Past Due Total Commercial: C&I $ 71,324 $ 12,198 $ — $ 83,522 CRE 92,310 — — 92,310 Total commercial 163,634 12,198 — 175,832 Consumer: Single-family residential 9,082 4,218 2,459 15,759 HELOCs 8,591 3,069 3,160 14,820 Total consumer 17,673 7,287 5,619 30,579 Total $ 181,307 $ 19,485 $ 5,619 $ 206,411 Payment Performance as of December 31, 2023 ($ in thousands) Current 30-89 Days Past Due 90+ Days Past Due Total Commercial: C&I $ 52,087 $ 8,153 $ 9,306 $ 69,546 CRE 46,409 — — 46,409 Total commercial 98,496 8,153 9,306 115,955 Consumer: Single-family residential 11,197 2,425 547 14,169 HELOCs 4,207 177 749 5,133 Total consumer 15,404 2,602 1,296 19,302 Total $ 113,900 $ 10,755 $ 10,602 $ 135,257 As of December 31, 2024 and 2023, commitments to lend additional funds to borrowers whose loans were modified were $10 million and $4 million, respectively. Troubled Debt Restructurings Prior to the Adoption of ASU 2022-02 Prior to the adoption of ASU 2022-02, the Company accounted for a modification to the contractual terms of a loan that resulted in granting a concession to a borrower experiencing financial difficulties as a TDR. ASU 2022-02 eliminated TDR accounting prospectively for all restructurings occurring on or after January 1, 2023. The following table presents the additions to TDRs for the year ended December 31, 2022: Loans Modified as TDRs During the Year Ended December 31, 2022 ($ in thousands) Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) Financial Impact (2) Commercial: C&I 7 $ 69,050 $ 38,415 $ 12,638 Total commercial 7 69,050 38,415 12,638 Consumer: HELOCs 2 662 697 2 Total consumer 2 662 697 2 Total 9 $ 69,712 $ 39,112 $ 12,640 (1) Includes subsequent payments after modification and reflects the balance as of December 31, 2022. (2) Includes charge-offs and specific reserves recorded since the modification date. Loans modified more than once are reported in the period they were first modified. The following table presents the TDR post-modification outstanding balances by the primary modification type for the year ended December 31, 2022: Modification Type During the Year Ended December 31, 2022 ($ in thousands) Principal (1) Other (2) Total Commercial: C&I $ 24,238 $ 14,177 $ 38,415 Total commercial 24,238 14,177 38,415 Consumer: HELOCs 697 — 697 Total consumer 697 — 697 Total $ 24,935 $ 14,177 $ 39,112 (1) Includes forbearance payments, term extensions and principal deferments that modify the terms of the loan from principal and interest payments to interest payments only. (2) Includes primarily funding to secure additional collateral and provide liquidity to collateral-dependent and term extension to C&I loans. After a loan is modified as a TDR, the Company continues to monitor its performance under its most recent restructured terms. A TDR may become delinquent and result in payment default (generally 90 days past due) subsequent to restructuring. The following table presents information on loans that entered into default during the year ended December 31, 2022 that were modified as TDRs during the 12 months preceding payment default: Loans Modified as TDRs that Subsequently During the Year Ended December 31, 2022 ($ in thousands) Number of Loans Recorded Investment Commercial: C&I 2 $ 10,296 Total commercial 2 10,296 Total 2 $ 10,296 As of December 31, 2022 , the remaining commitments to lend to borrowers whose terms of their outstanding owed balances were modified as TDRs was $16 million. Allowance for Credit Losses The Company has a current expected credit losses (“CECL”) framework for all financial assets measured at amortized cost and certain off-balance sheet credit exposures. The Company’s allowance for credit losses, which includes both the allowance for loan losses and the allowance for unfunded credit commitments, is calculated with the objective of maintaining a reserve sufficient to absorb losses inherent in our credit portfolios. The measurement of the allowance for credit losses is based on management’s best estimate of lifetime expected credit losses, periodic evaluation of the loan portfolio, lending-related commitments and other relevant factors. The allowance for credit losses is deducted from the amortized cost basis of a financial asset or a group of financial assets so that the balance sheet reflects the net amount the Company expects to collect. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts, deferred fees and costs, and escrow advances. Subsequent changes in expected credit losses are recognized in net income as a provision for, or a reversal of, credit loss expense. The allowance for credit losses estimation involves procedures to consider the unique risk characteristics of the portfolio segments. The majority of the Company’s credit exposures that share risk characteristics with other similar exposures are collectively evaluated. The collectively evaluated loans include performing loans and unfunded credit commitments. If an exposure does not share risk characteristics with other exposures, the Company generally estimates expected credit losses on an individual basis. Allowance for Collectively Evaluated Loans The allowance for collectively evaluated loans consists of a quantitative component that assesses the different risk factors considered in our models and a qualitative component that considers risk factors external to the models. Each of these components are described below. Quantitative Component — The Company applies quantitative methods to estimate loan losses by considering a variety of factors such as historical loss experience, the current credit quality of the portfolio, and an economic outlook over the life of the loan. The Company incorporates forward-looking information using macroeconomic scenarios which include variables that are considered key drivers of increases and decreases in credit losses. The Company utilizes a probability-weighted, multiple-scenario forecast approach. These scenarios may consist of a base forecast representing management's view of the most likely outcome, combined with downside or upside scenarios reflecting possible worsening or improving economic conditions. The quantitative models incorporate a probability-weighted calculation of these macroeconomic scenarios over a reasonable and supportable forecast period. If the life of the loans extends beyond the reasonable and supportable forecast period, the Company will consider historical experience or long-run macroeconomic trends over the remaining life of the loans to estimate the allowance for loan losses. There were no changes to the reasonable and supportable forecast period, except to the C&I segment, and no changes to the reversion to the historical loss experience method in 2024 and 2023. The reasonable and supportable forecast period for the C&I segment changed from 11 quarters to eight quarters due to model redevelopment during the third quarter of 2023. The following table provides key credit risk characteristics and macroeconomic variables that the Company uses to estimate the expected credit losses by portfolio segment: Portfolio Segment Risk Characteristics Macroeconomic Variables C&I Age percentage, size at origination, delinquency status, sector and risk rating Unemployment rate, Gross Domestic Product (“GDP”), and U.S. Treasury rates CRE, Multifamily residential, and Construction and land Delinquency status, maturity date, collateral value, property type, and geographic location Unemployment rate, GDP, and U.S. Treasury rates Single-family residential and HELOCs FICO score, delinquency status, maturity date, collateral value, and geographic location Unemployment rate, GDP, and Home Price Indices Other consumer Loss rate approach Immaterial - Macroeconomic variables are included in the qualitative estimate. Quantitative Component — Allowance for Loan Losses for the Commercial Loan Portfolio The Company’s C&I lifetime loss rate model estimates the loss rate expected over the life of a loan. This loss rate is applied to the amortized cost basis, excluding accrued interest receivable, to determine expected credit losses. The lifetime loss rate model’s reasonable and supportable period spans eight quarters, thereafter immediately reverting to the historical average loss rate, expressed through the loan-level lifetime loss rate. To generate estimates of expected loss at the loan level for CRE, multifamily residential, and construction and land loans, projected probabilities of default (“PDs”) and loss given defaults (“LGDs”) are applied to the estimated exposure at default, considering the term and payment structure of the loan. The forecast of future economic conditions returns to long-run historical economic trends within the reasonable and supportable period. To estimate the life of a loan under both models, the contractual term of the loan is adjusted for estimated prepayments based on historical prepayment experience. Quantitative Component — Allowance for Loan Losses for the Consumer Loan Portfolio For single-family residential and HELOC loans, projected PDs and LGDs are applied to the estimated exposure at default, considering the term and payment structure of the loan, to generate estimates of expected loss at the loan level. The forecast of future economic conditions returns to long-run historical economic trends after the reasonable and supportable period. To estimate the life of a loan for the single-family residential and HELOC loan portfolios, the contractual term of the loan is adjusted for estimated prepayments based on historical prepayment experience. For other consumer loans, the Company uses a loss rate approach. Qualitative Component — The Company c

Affordable Housing Partnership,

Affordable Housing Partnership, Tax Credit and Community Reinvestment Act Investments, Net	12 Months Ended
	Dec. 31, 2024
Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities [Abstract]
Affordable Housing Partnership, Tax Credit and Community Reinvestment Act Investments, Net	Affordable Housing Partnership, Tax Credit and Community Reinvestment Act Investments, Net The CRA encourages banks to meet the credit needs of their communities, particularly low- and moderate-income individuals and neighborhoods. The Company invests in certain affordable housing projects in the form of ownership interests in limited partnerships or limited liability companies that qualify for CRA consideration and tax credits. These entities are formed to develop and operate apartment complexes designed as high-quality affordable housing for lower income tenants throughout the U.S. To fully utilize the available tax credits, each of these entities must meet the affordable housing regulatory requirements for a 15-year minimum compliance period. The Company also invests in small business investment companies and new markets tax credit projects that qualify for CRA consideration, as well as eligible projects that qualify for production, historic and renewable energy tax credits. Investments in new markets tax credits promote development in low-income communities, investments in production and renewable energy tax credits help promote the development of renewable energy sources, and investments in historic tax credits promote the rehabilitation of historic buildings and economic revitalization of the surrounding areas. The majority of affordable housing partnership, tax credit and CRA investments discussed above are variable interest entities where the Company is a limited partner in these investments, and an unrelated third party is typically the general partner or managing member who has control over the significant activities of these investments. While the Company’s interest in some of the investments may exceed 50% of the outstanding equity interests, the Company does not consolidate these investments due to the general partner’s or managing member’s ability to manage the entity, which is indicative of the general partner’s or managing member’s power over the entity. The Company’s maximum exposure to loss in connection with these partnerships consists of the unamortized investment balance and any tax credits claimed that may become subject to recapture. The Company records its investments in qualifying affordable housing partnerships, net, using PAM. Following the adoption of ASU 2023-02 on January 1, 2024, the Company elects to account for its tax credit investments using PAM on a program-by-program basis if certain conditions are met. For the Company’s accounting policies on tax credit investments, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Securities and Affordable Housing Partnership, Tax Credit and CRA Investments, Net in this Form 10-K. For discussion on the Company’s impairment evaluation and monitoring process of tax credit investments, refer to Note 2 — Fair Value Measurement and Fair Value of Financial Instruments — Affordable Housing Partnership, Tax Credit and CRA Investments, Net to the Consolidated Financial Statements in this Form 10-K. The following table presents the investments and unfunded commitments of the Company’s affordable housing partnership, tax credit, and CRA investments, net as of December 31, 2024 and 2023: December 31, 2024 2023 ($ in thousands) Assets Liabilities - Unfunded Commitments (1) Assets Liabilities - Unfunded Commitments (1) PAM: Affordable housing partnership investments $ 500,217 $ 280,919 $ 419,785 $ 251,746 Tax credit and CRA investments 160,429 21,202 — — Equity method of accounting and other: Tax credits and CRA investments 265,994 105,743 485,251 298,990 Total $ 926,640 $ 407,864 $ 905,036 $ 550,736 (1) Included in Accrued expenses and other liabilities on the Consolidated Balance Sheet. The following table presents additional information related to the investments in affordable housing partnership, tax credit and CRA investments for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Tax credits and benefits (1) : PAM: Affordable housing partnership investments $ 70,335 $ 60,939 $ 52,132 Tax credit and CRA investments 110,260 — — Equity method of accounting and other: Tax credit and CRA investments 64,720 124,433 116,132 Total tax credits and benefits $ 245,315 $ 185,372 $ 168,264 Amortization: PAM: Affordable housing partnership investments (2) $ 46,113 $ 43,041 $ 38,759 Tax credit and CRA investments (3) 90,113 — — Equity method of accounting and other: Tax credit and CRA investments (4) (5) 54,242 120,299 113,358 Total amortization $ 190,468 $ 163,340 $ 152,117 (1) Included in Income tax expense on the Consolidated Statement of Income for the years ended December 31, 2024, 2023 and 2022. (2) Amortization related to investments in qualified affordable housing partnerships under PAM was recorded in Income tax expense on the Consolidated Statement of Income for the years ended December 31, 2024, 2023 and 2022. (3) Due to the adoption of ASU 2023-02 on January 1, 2024, amortization related to qualifying tax credit investments under PAM was recorded in Income tax expense on the Consolidated Statement of Income for the year ended December 31, 2024. (4) Amortization related to tax credit and CRA investments was recognized in Amortization of tax credit and CRA investments as part of noninterest expense on the Consolidated Statement Income for the years ended December 31, 2024, 2023 and 2022. (5) Includes impairment of $1 million for the year ended December 31, 2024, and net impairment recoveries of $1 million and $469 thousand for the years ended December 31, 2023 and 2022, respectively. The activity was primarily related to historic and/or energy tax credits. As of December 31, 2024, the Company’s unfunded commitments related to investments in affordable housing partnership, tax credit and CRA investments, net are estimated to be funded as follows: ($ in thousands) Amount 2025 $ 304,008 2026 85,995 2027 9,434 2028 1,643 2029 1,306 Thereafter 5,478 Total $ 407,864 The Company also held equity securities without readily determinable fair values totaling $147 million and $146 million as of December 31, 2024 and 2023, respectively. These equity securities without readily determinable fair values are included in Other Assets

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill Total goodwill was $466 million as of both December 31, 2024 and 2023. The Company’s goodwill impairment test is performed annually, as of December 31, or more frequently as events occur or circumstances change that would more-likely-than-not reduce the fair value of a reporting unit below its carrying value. The Company completed its annual goodwill impairment test as of December 31, 2024 by using a qualitative assessment, and concluded goodwill was not impaired. Additional information pertaining to the Company’s accounting policy for goodwill is summarized in Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Goodwill to the Consolidated Financial Statements in this Form 10-K. The Company has an equity method investment in Rayliant and its carrying value was $108 million as of December 31, 2024, of which $101 million was comprised of equity method goodwill.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2024
DEPOSIT ACCOUNTS
Deposits	Deposits The following table presents the composition of the Company’s deposits as of December 31, 2024 and 2023: December 31, ($ in thousands) 2024 2023 Deposits: Noninterest-bearing demand $ 15,450,428 $ 15,539,872 Interest-bearing checking 7,940,692 7,558,908 Money market 14,816,511 13,108,727 Savings: Domestic office 1,583,657 1,638,916 Foreign office 167,963 202,551 Time deposits (1) : Domestic office 21,128,657 16,037,287 Foreign office 2,087,115 2,006,177 Total deposits $ 63,175,023 $ 56,092,438 (1) The aggregate amount of time deposits that met or exceeded the deposit insurance limit was $16.5 billion and $13.6 billion as of December 31, 2024 and 2023, respectively. The following table presents the scheduled maturities of time deposits for the five years succeeding December 31, 2024: ($ in thousands) Amount 2025 $ 22,590,146 2026 270,237 2027 299,214 2028 53,109 2029 3,066 Total $ 23,215,772

Short-Term Borrowings and Long-

Short-Term Borrowings and Long-Term Debt	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Short-Term Borrowings and Long-Term Debt	Short-Term Borrowings and Long-Term Debt The following table presents details of the Company’s BTFP borrowings, FHLB advances, and long-term debt as of December 31, 2024 and 2023: December 31, 2024 2023 ($ in thousands) Interest Rate Maturity Dates Amount Amount Parent company Junior subordinated debt (1) — floating 6.17% 12/15/2035 $ 32,001 $ 148,249 Bank BTFP borrowings 4.37% 3/19/2024 $ — $ 4,500,000 FHLB advances (2) : Floating (3) 4.56% — 4.61% 2025 $ 3,000,000 $ — Fixed 3.87% — 3.95% 2026 500,000 — Total FHLB advances $ 3,500,000 $ — (1) As of December 31, 2024, the remaining junior subordinated debt outstanding was issued by MCBI Statutory Trust I that had a stated interest rate of 3-month CME Term Secured Overnight Financing Rate ("SOFR") + 1.81%. The weighted-average contractual interest rates for junior subordinated debt were 6.17% and 6.87% as of December 31, 2024 and 2023, respectively. (2) The weighted-average interest rate for FHLB advances was 4.48% as of December 31, 2024. (3) Floating interest rates are based on the SOFR plus the established spread. Bank Term Funding Program As of December 31, 2023, the Company’s short-term borrowings consisted of funds from the BTFP, which were repaid upon maturity in March 2024. FHLB Advances The Bank’s available borrowing capacity from FHLB advances totaled $9.9 billion as of December 31, 2024. The Bank’s available borrowing capacity from the FHLB is derived from its portfolio of loans that are pledged to the FHLB, reduced by any outstanding FHLB advances. As of December 31, 2024, all advances were secured by real estate loans. In comparison, there were no FHLB advances borrowings as of December 31, 2023 . Long-Term Debt — Junior Subordinated Debt As of December 31, 2024, East West had one statutory business trust for the purpose of holding junior subordinated debt issued to third party investors. The proceeds from these issuances represent liabilities of East West to the Trust and are reported as a component of L o ng-term debt on the Consolidated Balance Sheet. Interest payments on these securities are disbursed quarterly and are deductible for tax purposes. During the first quarter of 2024, the Company redeemed approximately $117 million of junior subordinated debt. The remaining outstanding principal amounts included $35 million of junior subordinated debt and $1 million of t rust preferred securities as of December 31, 2024.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The following table presents the components of income tax expense (benefit) for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Current income tax expense: Federal $ 166,268 $ 172,428 $ 163,797 State 153,891 173,080 160,629 Foreign 10,399 2,240 3,133 Total current income tax expense 330,558 347,748 327,559 Deferred income tax (benefit) expense: Federal (6,467) (24,319) (23,484) State (5,582) (23,415) (21,835) Foreign (2,234) (1,405) 1,331 Total deferred income tax benefit (14,283) (49,139) (43,988) Income tax expense $ 316,275 $ 298,609 $ 283,571 The following table presents the reconciliation of the federal statutory rate to the Company’s effective tax rate for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, 2024 2023 2022 Statutory U.S. federal tax rate 21.0 % 21.0 % 21.0 % U.S. state income taxes, net of U.S. federal income tax effect 7.7 8.1 7.8 Tax credits and benefits, net of amortization (7.4) (9.9) (8.9) Other, net — 1.3 0.2 Effective tax rate 21.3 % 20.5 % 20.1 % The following table summarizes the tax effects of temporary differences that give rise to a significant portion of deferred tax assets and liabilities as of December 31, 2024 and 2023: December 31, ($ in thousands) 2024 2023 Deferred tax assets: Allowance for credit losses and nonperforming assets valuation allowance $ 233,879 $ 217,731 Net unrealized losses on AFS debt and transferred securities 223,814 246,835 Stock compensation and other accrued compensation 41,118 33,169 Lease liabilities 27,644 32,636 FDIC special assessment charge 16,843 22,212 Basis difference in investments 17,708 28,216 State capital loss and tax credit carryforwards 11,122 266 Nonaccrual loans’ interest income 8,809 7,034 State taxes 5,808 9,885 Other 14,665 10,535 Total deferred tax assets $ 601,410 $ 608,519 Deferred tax liabilities: Operating lease right-of-use assets $ 25,647 $ 30,272 Basis difference in investments 25,587 23,103 Equipment lease financing 10,395 15,564 Prepaid expenses 2,319 2,981 FHLB stock dividends 1,961 1,947 Mortgage servicing assets 1,678 2,102 Other 20,479 13,801 Total deferred tax liabilities $ 88,066 $ 89,770 Net deferred tax assets $ 513,344 $ 518,749 The Company has not repatriated and does not intend to repatriate earnings from its foreign subsidiary. The Company determined such earnings are to be indefinitely reinvested in the local jurisdiction. The related unrecognized deferred tax liability on these earnings is immaterial. As of December 31, 2024, the Company had deferred tax assets of $8 million and $3 million related to state capital loss carryforwards and state tax credit carryforwards, respectively. These carryforwards are expected to be fully utilized before they start to expire in 2027. As of both December 31, 2024 and 2023, the Company concluded that no valuation allowance was necessary to reduce the deferred tax assets since estimated future taxable income will be sufficient to utilize these assets. For further information on the Company’s valuation policy on deferred taxes, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Income Taxes to the Consolidated Financial Statements in this Form 10-K. The following table presents a reconciliation of the beginning and ending balances of unrecognized tax benefits for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Beginning balance $ 1,193 $ 477 $ 5,045 Additions for tax positions related to prior years 2,698 (1) 459 — Additions for tax positions related to current year 779 257 — Settlements with taxing authorities — — (4,568) (2) Ending balance $ 4,670 $ 1,193 $ 477 (1) In 2024, the increase in positions related to prior years primarily related to proposed adjustments resulting from examination of the Company’s state tax returns. (2) In 2022, the Company settled an issue regarding previously claimed tax credits related to DC Solar and affiliates. The Company recognizes interest and penalties, as applicable, related to the underpayment of income taxes as a component of Income tax expense on the Consolidated Statement of Income. The Company recorded net interest expense of $1 million for the year ended December 31, 2024. In comparison, the net interest and penalties related to unrecognized tax benefits were immaterial for the years ended December 31, 2023 and 2022. Total accrued interest included in Accrued expenses and other liabilitie s on the Consolidated Balance Sheet was $1 million as of December 31, 2024 and immaterial as of December 31, 2023. The Company files federal income tax returns, as well as returns in various state and foreign jurisdictions. We are routinely examined by tax authorities in these various jurisdictions. The Company is subject to federal income tax examination for the tax years 2021 and forward. With few exceptions, the Company is also subject to tax examination in various state and local jurisdictions for the tax years 2020 and forward. The Company does not believe that the outcome of unresolved issues or claims in any of the tax jurisdictions is likely to be material on the Company’s Consolidated Financial Statements. The Company believes that adequate provisions have been recorded for all income tax uncertainties consistent with ASC 740, Income Taxes as of December 31, 2024.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Commitments to Extend Credit — In the normal course of business, the Company provides loan commitments and letters of credit to customers on predetermined terms. These outstanding commitments to extend credit are not reflected in the accompanying Consolidated Financial Statements. While the Company does not anticipate losses from these transactions, commitments to extend credit are included in determining the appropriate level of allowance for unfunded credit commitments. The following table presents the Company’s credit-related commitments as of December 31, 2024 and 2023: December 31, 2024 2023 ($ in thousands) Expire in One Year or Less Expire After One Year Through Three Years Expire After Three Years Through Five Years Expire After Five Years Total Total Loan commitments $ 4,741,319 $ 3,640,167 $ 661,403 $ 85,151 $ 9,128,040 $ 9,141,447 Commercial letters of credit and SBLCs 1,152,114 465,073 194,483 1,105,359 2,917,029 2,610,761 Total $ 5,893,433 $ 4,105,240 $ 855,886 $ 1,190,510 $ 12,045,069 $ 11,752,208 Loan commitments are agreements to lend to customers provided there are no violations of any conditions established in the agreement. Commitments generally have fixed expiration dates or other termination clauses and may require commitment fees. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future funding requirements. Commercial letters of credit are issued to facilitate domestic and foreign trade transactions, while SBLCs are generally contingent upon the failure of the customers to perform according to the terms of the underlying contract with the third party. As a result, the total contractual amounts do not necessarily represent future funding requirements. The Company’s historical experience is that SBLCs typically expire without being funded. Additionally, in many cases, the Company holds collateral in various forms against these SBLCs. As part of its risk management activities, the Company monitors the creditworthiness of customers in conjunction with its SBLC exposure. Customers are obligated to reimburse the Company for any payment made on the customers’ behalf. If the customers fail to pay, the Company would, as applicable, liquidate the collateral and/or offset existing accounts. As of December 31, 2024, total letters of credit of $2.9 billion consisted of SBLCs of $2.9 billion and commercial letters of credit of $29 million. In comparison, as of December 31, 2023, total letters of credit of $2.6 billion consisted of SBLCs of $2.6 billion and commercial letters of credit of $24 million. As of both December 31, 2024 and 2023, substantially all letters of credit were graded “Pass” using the Bank’s internal credit risk rating system. The Company applies the same credit underwriting criteria to extend loans, commitments and conditional obligations to customers. Each customer’s creditworthiness is evaluated on a case-by-case basis. Collateral and financial guarantees may be obtained based on management’s assessment of a customer’s credit risk. Collateral may include cash, accounts receivable, inventory, personal property, plant and equipment, and real estate property. Estimated exposure to loss from these commitments is included in the allowance for unfunded credit commitments, and amounted to $39 million and $38 million as of December 31, 2024 and 2023, respectively. Guarantees — From time to time, the Company sells or securitizes single-family and multifamily residential loans with recourse in the ordinary course of business. The Company is obligated to repurchase up to the recourse component of the loans if the loans default. The following table presents the maximum potential future payments and carrying value of loans sold or securitized with recourse as of December 31, 2024 and 2023: Maximum Potential Future Payments Carrying Value (1) December 31, December 31, 2024 2023 2024 2023 ($ in thousands) Expire in One Year or Less Expire After One Year Through Three Years Expire After Three Years Through Five Years Expire After Five Years Total Total Total Total Single-family residential loans sold or securitized with recourse $ 10 $ — $ 40 $ 4,325 $ 4,375 $ 5,888 $ 4,375 $ 5,888 Multifamily residential loans sold or securitized with recourse — — 145 14,851 14,996 14,996 17,770 19,020 Total $ 10 $ — $ 185 $ 19,176 $ 19,371 $ 20,884 $ 22,145 $ 24,908 (1) Represents the unpaid principal balance. The Company’s recourse reserve related to these guarantees is included in the allowance for unfunded credit commitments and totaled $34 thousand and $40 thousand as of December 31, 2024 and 2023, respectively. The allowance for unfunded credit commitments is included in Accrued expenses and other liabilities on the Consolidated Balance Sheet. The Company continues to experience minimal losses from the single-family and multifamily residential loan portfolios sold or securitized with recourse. Litigation — The Company is a party to various legal actions arising in the ordinary course of its business. In accordance with ASC 450, Contingencies , the Company accrues reserves for outstanding lawsuits, claims and proceedings when a loss contingency is probable and can be reasonably estimated. The Company estimates the amount of loss contingencies using current available information from legal proceedings, advice from legal counsel and available insurance coverage. Due to the inherent subjectivity of the assessments and unpredictability of the outcomes of the legal proceedings, any amounts accrued or included in this aggregate amount may not represent the ultimate loss to the Company from the legal proceedings in question. Thus, the Company’s exposure and ultimate losses may be higher, and possibly significantly more than the amounts accrued. While it is impossible to ascertain the ultimate resolution or range of financial liability, based on information known to the Company as of December 31, 2024, the Company does not believe there are any pending legal proceedings to which the Company is a party that, individually or in the aggregate, would reasonably be expected to have a material adverse effect on the Company’s financial condition. In light of the inherent uncertainty in legal proceedings, however, there can be no assurance that the ultimate resolution will not exceed established reserves and it is possible that the outcome of a particular matter, or a combination of matters, may be material to the Company’s financial condition for a particular period, depending upon the size of the loss and the Company’s income for that particular period.

Stock Compensation Plans

Stock Compensation Plans	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
Stock Compensation Plans	Stock Compensation Plans Pursuant to the Company’s 2021 Stock Incentive Plan, as amended, the Company may issue stock, stock options, restricted stock, RSUs including performance-based RSUs, stock purchase warrants, stock appreciation rights, phantom stock and dividend equivalents to eligible employees, non-employee directors, consultants, and other service providers of East West and its subsidiaries. The Company has granted RSUs as its primary incentive awards. There were no outstanding awards other than RSUs as of December 31, 2024, 2023 and 2022. An aggregate of 17 million shares of common stock were authorized under the 2021 Stock Incentive Plan, and the total number of shares available for grant was approximately 4 million as of December 31, 2024. The following table presents a summary of the total share-based compensation expense and the related net tax benefits associated with the Company’s various employee share-based compensation plans for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Stock compensation costs $ 45,535 $ 39,867 $ 37,601 Related net tax benefits for stock compensation plans $ 997 $ 8,959 $ 5,293 Restricted Stock Units — RSUs are granted under the Company’s long-term incentive plan at no cost to the recipient. RSUs generally cliff vest after three years of continued employment from the date of the grant, and are authorized to settle in shares of the Company’s common stock. Dividends are accrued during the vesting period and paid at the time of vesting. While a portion of RSUs are time-based vesting awards, others vest subject to attainment of additional specified performance goals, referred to as “performance-based RSUs.” Performance-based RSUs are granted annually upon approval by the Company’s Compensation and Management Development Committee based on the performance in the year prior to the grant date of the award. The number of awards that vest can range from zero percent to a maximum of 200% of the granted number of awards based on the Company’s achievement of specified performance criteria over a performance period of three years. For information on accounting on stock-based compensation plans, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Stock-Based Compensation to the Consolidated Financial Statements in this Form 10-K. The following table presents a summary of the activities for the Company’s time-based and performance-based RSUs that were settled in shares for the year ended December 31, 2024. The number of performance-based RSUs stated below reflects the number of awards granted on the grant date: Time-Based RSUs Performance-Based RSUs Shares Weighted-Average Grant Date Fair Value Shares Weighted-Average Grant Date Fair Value Outstanding, January 1, 2024 1,206,518 $ 74.29 276,223 $ 78.59 Granted 553,398 $ 76.44 97,798 $ 80.28 Vested (329,468) $ 72.05 (91,960) $ 77.67 Forfeited (81,836) $ 74.53 — $ — Outstanding, December 31, 2024 1,348,612 $ 75.70 282,061 $ 79.48 The weighted-average grant date fair value of the time-based RSUs granted during the years ended December 31, 2024, 2023, and 2022 was $76.44, $73.13, and $78.15, respectively. The weighted-average grant date fair value of the performance-based RSUs granted during the years ended December 31, 2024, 2023 and 2022 was $80.28, $79.93 and $77.91, respectively. The total fair value of time-based RSUs that vested during the years ended December 31, 2024, 2023 and 2022 was $25 million, $39 million and $30 million, respectively. The total fair value of performance-based RSUs that vested during the years ended December 31, 2024, 2023, and 2022 was $12 million, $21 million and $18 million, respectively. As of December 31, 2024, there were $34 million of unrecognized compensation costs related to unvested time-based RSUs expected to be recognized over a weighted-average period of 1.79 years, and $16 million of unrecognized compensation costs related to unvested performance-based RSUs expected to be recognized over a weighted-average period of 1.13 years. Employee Stock Purchase Plan — The 1998 Employee Stock Purchase Plan (the “Purchase Plan”) provides eligible employees of the Company the right to purchase shares of its common stock at a discount. Employees can purchase shares at 90% of the fair market price subject to an annual purchase limitation of $22,500 per employee. As of December 31, 2024, the Purchase Plan qualifies as a non-compensatory plan under Section 423 of the Internal Revenue Code and, accordingly, no compensation expense has been recognized. 2,000,000 shares of the Company’s common stock were authorized for sale under the Purchase Plan. During the years ended December 31, 2024 and 2023, 41,563 shares totaling $3 million and 65,971 shares totaling $3 million, respectively, were sold to employees under the Purchase Plan. As of December 31, 2024, there were 110,251 shares available under the Purchase Plan.

Stockholders' Equity and Earnin

Stockholders' Equity and Earnings Per Share	12 Months Ended
	Dec. 31, 2024
Stockholders' Equity and Earnings Per Share [Abstract]
Stockholders' Equity and Earnings Per Share	Stockholders’ Equity and Earnings Per Share The following table presents the basic and diluted EPS calculations for the years ended December 31, 2024, 2023 and 2022. For more information on the calculation of EPS, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Earnings Per Share to the Consolidated Financial Statements in this Form 10-K. Year Ended December 31, ($ and shares in thousands, except per share data) 2024 2023 2022 Basic: Net income $ 1,165,586 $ 1,161,161 $ 1,128,083 Weighted-average number of shares outstanding 138,898 141,164 141,326 Basic EPS $ 8.39 $ 8.23 $ 7.98 Diluted: Net income $ 1,165,586 $ 1,161,161 $ 1,128,083 Weighted-average number of shares outstanding 138,898 141,164 141,326 Add: Diluted impact of unvested RSUs 1,060 738 1,166 Diluted weighted-average number of shares outstanding 139,958 141,902 142,492 Diluted EPS $ 8.33 $ 8.18 $ 7.92 Approximately six thousand, 283 thousand and three thousand weighted-average shares of anti-dilutive RSUs were excluded from the diluted EPS computation for the years ended December 31, 2024, 2023 and 2022,respectively. Stock Repurchase Program — In 2020, the Company’s Board of Directors authorized a stock repurchase program to buy back up to $500 million of the Company’s common stock. The following table presents the activity under the Company’s common share repurchase program for the periods indicated: Year Ended December 31, ($ in thousands, except shares and per share data) Shares Repurchased Average Price per Share Total Cost 2024 1,943,346 $ 74.33 $ 144,446 2023 1,506,091 $ 54.56 $ 82,174 2022 1,385,517 $ 72.17 $ 99,990

Accumulated Other Comprehensive

Accumulated Other Comprehensive (Loss) Income	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
Accumulated Other Comprehensive (Loss) Income	Accumulated Other Comprehensive (Loss) Income The following table presents the changes in the components of AOCI balances for the years ended December 31, 2024, 2023 and 2022: ($ in thousands) Debt Securities (1) Cash Flow Hedges Foreign Currency Translation Adjustments (2) Total Balance, December 31, 2021 $ (85,703) $ 257 $ (4,935) $ (90,381) Net unrealized losses arising during the period (620,870) (52,623) (16,348) (689,841) Amounts reclassified from AOCI 11,758 2,835 — 14,593 Changes, net of tax (609,112) (49,788) (16,348) (675,248) Balance, December 31, 2022 $ (694,815) $ (49,531) $ (21,283) $ (765,629) Net unrealized gains (losses) arising during the period 76,930 (4,277) (56) 72,597 Amounts reclassified from AOCI 16,004 56,432 — 72,436 Changes, net of tax 92,934 52,155 (56) 145,033 Balance, December 31, 2023 $ (601,881) $ 2,624 $ (21,339) $ (620,596) Net unrealized gains (losses) arising during the period 50,302 (87,447) (982) (38,127) Amounts reclassified from AOCI 9,427 64,036 — 73,463 Changes, net of tax 59,729 (23,411) (982) 35,336 Balance, December 31, 2024 $ (542,152) $ (20,787) $ (22,321) $ (585,260) (1) Includes after-tax unamortized losses related to AFS debt securities that were transferred to HTM in 2022. (2) Represents foreign currency translation adjustments related to the Company’s net investment in non-U.S. operations, including related hedges. The functional currency and reporting currency of the Company’s foreign subsidiary was RMB and USD, respectively. The following table presents the components of other comprehensive (loss) income, reclassifications to net income and the related tax effects for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, 2024 2023 2022 ($ in thousands) Before-Tax Tax Effect Net-of-Tax Before-Tax Tax Effect Net-of-Tax Before-Tax Tax Effect Net-of-Tax Debt securities: Net unrealized gains (losses) on AFS debt securities arising during the period $ 71,259 $ (20,957) $ 50,302 $ 109,216 $ (32,286) $ 76,930 $ (721,100) $ 213,221 $ (507,879) Unrealized losses on debt securities transferred from AFS to HTM — — — — — — (160,416) 47,425 (112,991) Reclassification adjustments: Net realized (gains) losses on AFS debt securities reclassified into net income (1) (2,069) 612 (1,457) 6,862 (2) (2,029) 4,833 (1,306) 386 (920) Amortization of unrealized losses on transferred securities (3) 15,452 (4,568) 10,884 15,860 (4,689) 11,171 18,000 (5,322) 12,678 Net change 84,642 (24,913) 59,729 131,938 (39,004) 92,934 (864,822) 255,710 (609,112) Cash flow hedges: Net unrealized losses arising during the period (124,382) 36,935 (87,447) (5,767) 1,490 (4,277) (74,069) 21,446 (52,623) Net realized losses reclassified into net income (4) 91,083 (27,047) 64,036 79,843 (23,411) 56,432 4,004 (1,169) 2,835 Net change (33,299) 9,888 (23,411) 74,076 (21,921) 52,155 (70,065) 20,277 (49,788) Foreign currency translation adjustments, net of hedges: Net unrealized (losses) gains arising during the period (809) (173) (982) 698 (754) (56) (15,059) (1,289) (16,348) Net change (809) (173) (982) 698 (754) (56) (15,059) (1,289) (16,348) Other comprehensive income (loss) $ 50,534 $ (15,198) $ 35,336 $ 206,712 $ (61,679) $ 145,033 $ (949,946) $ 274,698 $ (675,248) (1) Pre-tax amounts were reported in Net gains (losses) on AFS debt securities on the Consolidated Statement of Income. (2) Represents the net loss related to an AFS debt security that was written-off in the first quarter of 2023 and subsequently sold during the fourth quarter of 2023. (3) Represents unrealized losses amortized over the remaining lives of securities that were transferred from the AFS to HTM portfolio in 2022. (4) Pre-tax amounts related to cash flow hedges on variable rate loans and long-term borrowings, where applicable, were reported in Interest and dividend income and in Interest expense, respectively , on the Consolidated Statement of Income. In 2023, pre-tax amount also includes the terminated cash flow hedge where the forecasted cash flows were no longer probable to occur and was reported in Noninterest income on the Consolidated Statement of Income.

Regulatory Requirements and Mat

Regulatory Requirements and Matters	12 Months Ended
	Dec. 31, 2024
Banking and Thrift, Interest [Abstract]
Regulatory Requirements and Matters	Regulatory Requirements and Matters The Company and the Bank are subject to regulatory capital adequacy requirements administered by the respective federal banking agencies that are based largely under the Basel III Capital Rules. As standardized approaches institutions, the Basel III Capital Rules require that banking organizations, such as the Company and the Bank, to maintain a minimum Common Equity Tier 1 (“CET1”) capital ratio of at least 4.5%, a Tier 1 capital ratio of at least 6.0%, a total capital ratio of at least 8.0%, and a Tier 1 leverage ratio of a least 4.0% to be considered adequately capitalized. The Federal Deposit Insurance Corporation Improvement Act of 1991 requires that the federal regulatory agencies adopt regulations defining capital categories for banks: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized and critically undercapitalized. Under the agencies’ Prompt Corrective Action regulations, failure of a bank to be well capitalized results in an escalating series of adverse regulatory consequences. As of both December 31, 2024 and 2023, the Company and the Bank were both categorized as well capitalized based on applicable U.S. regulatory capital ratio requirements in accordance with Basel III standardized approaches, as set forth in the table below. The Company believes that no changes in conditions or events have occurred since December 31, 2024, which would result in changes that would cause the Company or the Bank to fall below the well capitalized level. Basel III December 31, 2024 (1) December 31, 2023 (1) ($ in thousands) Amount Ratio Amount Ratio Minimum Regulatory Requirements Minimum Regulatory Requirements including Capital Conservation Buffer (3) Well-Capitalized Requirement Total capital (to risk-weighted assets) Company $ 8,561,797 15.6 % $ 7,919,407 14.8 % 8.0 % 10.5 % 10.0 % East West Bank $ 8,053,389 14.7 % $ 7,363,575 13.8 % 8.0 % 10.5 % 10.0 % Tier 1 capital (to risk-weighted assets) Company $ 7,839,816 14.3 % $ 7,140,778 13.3 % 6.0 % 8.5 % 6.0 % East West Bank $ 7,367,996 13.4 % $ 6,732,946 12.6 % 6.0 % 8.5 % 8.0 % CET1 capital (to risk-weighted assets) Company (2) $ 7,839,816 14.3 % $ 7,140,778 13.3 % 4.5 % 7.0 % N/A East West Bank $ 7,367,996 13.4 % $ 6,732,946 12.6 % 4.5 % 7.0 % 6.5 % Tier 1 leverage capital (to adjusted quarterly average assets) Company (2) $ 7,839,816 10.4 % $ 7,140,778 10.2 % 4.0 % 4.0 % N/A East West Bank $ 7,367,996 9.8 % $ 6,732,946 9.6 % 4.0 % 4.0 % 5.0 % N/A — Not applicable. (1) Reflected a delay of the estimated impact of CECL on regulatory capital in accordance with regulatory capital rules. (2) The well-capitalized requirements for CET1 capital and Tier 1 leverage capital apply only to the Bank since there is no CET1 capital ratio or Tier 1 leverage capital ratio component in the definition of a well-capitalized bank holding company. (3) Includes a 2.5% capital conservation buffer requirement above the minimum risk-based capital ratios.

Business Segments

Business Segments	12 Months Ended
	Dec. 31, 2024
Segment Reporting [Abstract]
Business Segments	Business Segments The Company organizes its operations into three reportable operating segments: (1) Consumer and Business Banking; (2) Commercial Banking; and (3) Treasury and Other. These segments are defined by the type of customers served, and the related products and services provided. The CODM is the Chairman and Chief Executive Officer (“CEO”) of the Company. The CODM regularly reviews the Company’s operating results to allocate resources and assess performance. Operating segment results are also based on the Company’s internal management reporting process, which reflects the allocations of certain balance sheet and income statement line items. The CODM uses certain performance measures such as segment net income and considers variances of actual results from forecast results on a quarterly basis when making decisions on resource allocations between segments. The segment information presented is not indicative of how the segments would perform if they operated as independent entities. The Consumer and Business Banking segment primarily provides financial products and services to consumer and commercial customers through the Company’s domestic branch network and digital banking platforms. This segment offers consumer and commercial deposits, mortgage and home equity loans, and other products and services. It also originates commercial loans for small- and medium-sized enterprises through the Company’s branch network. Other products and services provided by this segment include wealth management, private banking, treasury management, interest rate risk hedging and foreign exchange services. The Commercial Banking segment primarily generates domestic commercial loan and deposit products. Commercial loan products include CRE lending, construction finance, commercial business lending, working capital lines of credit, trade finance, letters of credit, affordable housing lending, asset-based lending, asset-backed finance, project finance and equipment financing. Commercial deposit products and other financial services include treasury management, foreign exchange services and interest rate and commodity risk hedging. The remaining centralized functions, including the corporate treasury activities of the Company, eliminations of inter-segment amounts, and centrally managed departments, have been aggregated and included in the Treasury and Other segment. The Company utilizes an internal reporting process to measure the performance of the three operating segments within the Company. The Company’s internal reporting process consists of certain allocation methodologies for revenues and expenses, and the internal funds transfer pricing (“FTP”) process. The FTP process is formulated with the goal of encouraging loan and deposit growth that is consistent with the Company’s overall profitability objectives, as well as providing a reasonable and consistent basis for the measurement of its business segments’ net interest margins and profitability. The FTP process charges a cost to fund loans (“FTP charges for loans”) and allocates credits for funds provided from deposits (“FTP credits for deposits”) using internal FTP rates. FTP charges for loans are determined based on a matched cost of funds, which is tied to the pricing and term characteristics of the loans. FTP credits for deposits are based on matched funding credit rates, which are tied to the implied or stated maturity of the deposits. FTP credits for deposits reflect the long-term value generated by the deposits. The net spread between the total internal FTP charges and credits is recorded as part of net interest income in the Treasury and Other segment. The corporate treasury function within the Treasury and Other segment is responsible for the Company’s liquidity and interest rate management and manages the corporate interest rate risk exposure. The Company’s internal FTP assumptions and methodologies are reviewed at least annually to ensure that the process is reflective of current market conditions. Each segment’s net interest income represents the difference between actual interest earned on assets and interest incurred on liabilities of the segment, adjusted for funding charges or credits through the Company’s FTP process. Noninterest income and noninterest expense directly attributable to a business segment are assigned to that segment. Loan charge-offs and provision for credit losses are recorded to the segments, where the loans are recorded. Significant corporate overhead expenses incurred by centralized support areas in the Treasury and Other segment are allocated to the Consumer and Business Banking and Commercial Banking segments based on the segment’s estimated usage factors including, but not limited to, full-time equivalent employees, net interest income, and loan and deposit volume. Amortization of tax credit and CRA investments and certain types of administrative expenses are generally not allocated to segments. During the third quarter of 2024, the Company refined its segment allocation methodology and reclassified certain deposits and their related income or expenses from the “Consumer and Business Banking” segment to the “Commercial Banking” or “Treasury and Other” segments, and certain loan balances and their related income or expenses from the “Commercial Banking” segment to the “Treasury and Other” segment. Balances for the prior years have been reclassified for comparability. The following tables present the operating results and other key financial measures for the individual operating segments as of and for the years ended December 31, 2024, 2023 and 2022: ($ in thousands) Consumer and Business Banking Commercial Banking Treasury and Other Total Year Ended December 31, 2024 Net interest income before provision for credit losses $ 1,152,033 $ 1,125,931 $ 752 $ 2,278,716 Noninterest income 108,773 197,780 28,665 335,218 Total revenue before provision for credit losses 1,260,806 1,323,711 29,417 2,613,934 Provision for (reversal of) credit losses 8,691 166,953 (1,644) 174,000 Compensation and employee benefits 217,612 234,240 98,882 550,734 Other noninterest expense (1) 234,494 161,969 10,876 407,339 Total noninterest expense 452,106 396,209 109,758 958,073 Segment income (loss) before income taxes 800,009 760,549 (78,697) 1,481,861 Segment net income $ 563,218 $ 535,652 $ 66,716 $ 1,165,586 Average balances: Loans $ 18,966,662 $ 32,996,221 $ 405,897 $ 52,368,780 Deposits $ 30,815,912 $ 25,820,956 $ 3,036,171 $ 59,673,039 As of December 31, 2024 Segment assets $ 20,084,814 $ 35,646,939 $ 20,244,722 $ 75,976,475 ($ in thousands) Consumer and Business Banking Commercial Banking Treasury and Other Total Year Ended December 31, 2023 Net interest income (loss) before provision for credit losses $ 1,225,954 $ 1,116,013 $ (29,713) $ 2,312,254 Noninterest income 103,890 168,502 22,872 295,264 Total revenue (loss) before provision for credit losses 1,329,844 1,284,515 (6,841) 2,607,518 Provision for credit losses 21,454 100,391 3,155 125,000 Compensation and employee benefits 203,387 217,663 87,488 508,538 Other noninterest expense (1) 262,086 158,949 93,175 514,210 Total noninterest expense 465,473 376,612 180,663 1,022,748 Segment income (loss) before income taxes 842,917 807,512 (190,659) 1,459,770 Segment net income (loss) $ 594,965 $ 570,153 $ (3,957) $ 1,161,161 Average balances: Loans $ 17,739,984 $ 31,365,547 $ 439,605 $ 49,545,136 Deposits $ 28,174,781 $ 23,304,066 $ 3,483,884 $ 54,962,731 As of December 31, 2023 Segment assets $ 19,165,172 $ 35,020,106 $ 15,427,606 $ 69,612,884 ($ in thousands) Consumer and Business Banking Commercial Banking Treasury and Other Total Year Ended December 31, 2022 Net interest income (loss) before provision for credit losses $ 1,061,238 $ 988,158 $ (3,515) $ 2,045,881 Noninterest income 113,722 174,365 10,579 298,666 Total revenue before provision for credit losses 1,174,960 1,162,523 7,064 2,344,547 Provision for (reversal of) credit losses 25,983 48,248 (731) 73,500 Compensation and employee benefits 195,394 211,355 70,886 477,635 Other noninterest expense (1) 196,581 102,018 83,159 381,758 Total noninterest expense 391,975 313,373 154,045 859,393 Segment income (loss) before income taxes 757,002 800,902 (146,250) 1,411,654 Segment net income $ 537,754 $ 569,982 $ 20,347 $ 1,128,083 Average balances: Loans $ 15,534,259 $ 29,321,701 $ 463,498 $ 45,319,458 Deposits $ 27,276,151 $ 23,252,073 $ 3,771,355 $ 54,299,579 As of December 31, 2022 Segment assets $ 17,183,425 $ 32,770,772 $ 14,157,953 $ 64,112,150 (1) The Treasury and Other segment's other noninterest expense is primarily comprised of amortization of tax credit and CRA investments, and other operating expenses. The Consumer and Business Banking segment's other noninterest expense is primarily comprised of corporate overhead allocated expenses, occupancy and equipment expense, other operating expenses, and deposit insurance premiums and regulatory assessments. The Commercial Banking segment’s other noninterest expense is primarily comprised of corporate overhead allocated expenses, deposit account expense, occupancy and equipment expense, and deposit insurance premiums and regulatory assessments.

Parent Company Condensed Financ

Parent Company Condensed Financial Statements	12 Months Ended
	Dec. 31, 2024
Condensed Financial Information Disclosure [Abstract]
Parent Company Condensed Financial Statements	Parent Company Condensed Financial Statements The following tables present the Parent Company-only condensed financial statements: CONDENSED BALANCE SHEET December 31, ($ in thousands) 2024 2023 ASSETS Cash and cash equivalents due from banks $ 394,919 $ 445,770 Investments in subsidiaries: Bank 7,251,084 6,542,852 Nonbank 10,423 13,502 Other assets 125,552 120,742 TOTAL $ 7,781,978 $ 7,122,866 LIABILITIES AND STOCKHOLDERS’ EQUITY Long-term debt $ 32,001 $ 148,249 Other liabilities 26,923 23,783 Stockholders’ equity 7,723,054 6,950,834 TOTAL $ 7,781,978 $ 7,122,866 CONDENSED STATEMENT OF INCOME Year Ended December 31, ($ in thousands) 2024 2023 2022 Dividends from subsidiaries: Bank $ 540,000 $ 704,000 $ 240,000 Nonbank 127 322 157 Other investment losses (954) (2,738) — Other income 31 — — Total income 539,204 701,584 240,157 Interest expense on long-term debt 4,507 10,889 5,450 Compensation and employee benefits 7,283 7,204 6,708 Other expense (income) (1) 1,839 (1,086) 1,254 Total expense 13,629 17,007 13,412 Income before income tax benefit and equity in undistributed income of subsidiaries 525,575 684,577 226,745 Income tax benefit 4,143 5,844 4,269 Undistributed earnings of subsidiaries, primarily bank 635,868 470,740 897,069 Net income $ 1,165,586 $ 1,161,161 $ 1,128,083 (1) Includes $3 million and $2 million in DC Solar recoveries for the years ended December 31, 2023 and 2022, respectively. CONDENSED STATEMENT OF CASH FLOWS Year Ended December 31, ($ in thousands) 2024 2023 2022 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 1,165,586 $ 1,161,161 $ 1,128,083 Adjustments to reconcile net income to net cash provided by operating activities: Undistributed earnings of subsidiaries, principally bank (635,868) (470,740) (897,069) Deferred income tax expense (benefit) 2,788 948 (2,193) Net change in other assets (6,912) (4,160) 4,250 Net change in other liabilities (802) (47) 779 Other operating activities, net 1,265 2,443 1,333 Net cash provided by operating activities 526,057 689,605 235,183 CASH FLOWS FROM INVESTING ACTIVITIES Redemption of trust preferred securities 3,558 — — Other investing activities, net (494) (95,095) (7,390) Net cash provided by (used in) investing activities 3,064 (95,095) (7,390) CASH FLOWS FROM FINANCING ACTIVITIES Long-term debt: Repayment of junior subordinated debt (116,558) — — Common stock: Proceeds from issuance pursuant to various stock compensation plans and agreements 3,023 3,208 3,178 Stock tendered for payment of withholding taxes (14,877) (23,751) (19,087) Repurchase of common stock pursuant to the stock repurchase program (143,082) (82,174) (99,990) Cash dividends paid (308,478) (274,554) (228,381) Net cash used in financing activities (579,972) (377,271) (344,280) Net (decrease) increase in cash and cash equivalents (50,851) 217,239 (116,487) Cash and cash equivalents, beginning of year 445,770 228,531 345,018 Cash and cash equivalents, end of year $ 394,919 $ 445,770 $ 228,531

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2024
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Declaration of Dividend and Repurchase Authorization — On January 23, 2025, the Company’s Board of Directors declared first quarter 2025 cash dividends for the Company’s common stock. The common stock cash dividend of $0.60 per share was paid on February 17, 2025 to stockholders of record as of February 3, 2025. In addition, on January 22, 2025, East West’s Board of Directors authorized the repurchase of up to an additional $300 million of East West stock. Southern California Wildfires — In January 2025, several wildfires affected Los Angeles and its surrounding areas. Based on the Company’s assessment of available information regarding its loan portfolio and related collateral within the affected areas, the Company has determined that the impact to its consolidated financial statements is immaterial through the date of filing of this Form 10-K.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pay vs Performance Disclosure
Net income	$ 1,165,586	$ 1,161,161	$ 1,128,083

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended	12 Months Ended
	Dec. 31, 2024 shares	Dec. 31, 2024 shares
Trading Arrangements, by Individual
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
Dominic Ng [Member]
Trading Arrangements, by Individual
Material Terms of Trading Arrangement		On November 20, 2024, Dominic Ng, Chairman of the Board and Chief Executive Officer of the Company, entered into a pre-arranged trading plan for the sale of shares of the Company’s common stock (a “Rule 10b5-1 Plan”) that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) of the “Exchange Act”. Mr. Ng’s Rule 10b5-1 Plan provides for the sale of up to 120,000 shares of common stock, which may commence effective March 6, 2025 and will terminate no later than December 19, 2025.
Name	Dominic Ng
Title	Chairman of the Board and Chief Executive Officer
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	November 20, 2024
Expiration Date	December 19, 2025
Arrangement Duration	288 days
Aggregate Available	120,000	120,000

Insider Trading Policies and Pr

Insider Trading Policies and Procedures	12 Months Ended
	Dec. 31, 2024
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Cybersecurity Risk Management a

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
	Dec. 31, 2024
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	The Information Security Program is supported by our three lines of defense model of risk management. The Information Security Team is the first line of defense under the Chief Information Security Officer and provides day-to-day cybersecurity operations including identification and reporting of internal and external threats, access control, data security, protective controls, detection of malicious or unauthorized activity, incident response, recovery planning, performance of vulnerability and third party information security assessments, and employee awareness and training programs. In addition, the Information Security Team works in coordination with the individual business lines that have direct and primary responsibility and accountability for identifying, controlling and monitoring cybersecurity risk embedded in their business activities. The Information Security Team uses reputable industry service providers for security operations, monitoring, investigation and incident response. The Information Risk Management team conducts periodic assessments in collaboration with consulting services with expertise in the cybersecurity domains. As the second line of defense, the ERM Team under the Chief Risk Officer independently monitors the cybersecurity risk framework across the Company, as well as the effectiveness of the Information Security Program, and third party vendors’ vulnerability and penetration tests against the Company’s network. Furthermore, the Third-Party Risk Management Team, in conjunction with the ERM Team and the Information Security Team, oversees, identifies, monitors, investigates and addresses material risks from cybersecurity threats associated with the Company’s use of third-party service providers. The Third-Party Risk Management Team is also part of the independent risk management function of the Bank and included in the second line of defense. The ERM Team reports the status of the annual assessment of the effectiveness of the Information Security Program to the Chief Risk Officer, who reports to the Board’s ROC. When applicable, the Company obtains Statement on Standards for Attestation Engagement 18 reports or equivalent reports for vendor products and services hosted by third parties. Internal Audit serves as the third line of defense and provides additional independent assurance and evaluates the effectiveness of cybersecurity risk management. In addition, the Company regularly engages independent external assessors to perform assessments of its cybersecurity control environment and operating effectiveness. In addition, the Company uses several internal training methods, through annual mandatory courses on security and privacy for all employees, as well as multiple simulated phishing attacks and regularly providing information security awareness materials throughout the year. The Company also maintains cybersecurity insurance.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	The Company maintains an Information Security Program to support the management of cybersecurity risk as an integral component of the Company’s ERM framework. The Information Security Program encompasses the Company’s cybersecurity policies and practices, which focus on prevention, detection, mitigation and recovery from cybersecurity incidents. In addition, as part of the Information Security Program, the Company has a Security Incident Response Policy and Plan to enable a coordinated response to protect the integrity, security and resiliency of the Company’s information systems, to mitigate the risk of cybersecurity incidents and to escalate information regarding certain cybersecurity incidents to the appropriate management personnel and Board members in a timely fashion. The Information Security Program follows a National Institute of Standards and Technology based Cybersecurity Framework and other applicable industry standards.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	The Board’s ROC has primary oversight responsibility for management’s efforts to mitigate cybersecurity risk and respond to cybersecurity incidents. The ROC receives quarterly cybersecurity reports, including any reportable incidents, and reviews and approves the Information Security Program at least annually or whenever significant changes are made to the program. These updates include information regarding management’s ongoing efforts to manage cybersecurity risk and the steps management has taken to address and mitigate the evolving cybersecurity threat environment. The ROC members include independent directors from the Board who have expertise in areas relevant to their responsibilities over cybersecurity, including senior leadership experience in financial services and information technology.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Board’s ROC has primary oversight responsibility for management’s efforts to mitigate cybersecurity risk and respond to cybersecurity incidents. The ROC receives quarterly cybersecurity reports, including any reportable incidents, and reviews and approves the Information Security Program at least annually or whenever significant changes are made to the program. These updates include information regarding management’s ongoing efforts to manage cybersecurity risk and the steps management has taken to address and mitigate the evolving cybersecurity threat environment. The ROC members include independent directors from the Board who have expertise in areas relevant to their responsibilities over cybersecurity, including senior leadership experience in financial services and information technology.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Board’s ROC has primary oversight responsibility for management’s efforts to mitigate cybersecurity risk and respond to cybersecurity incidents. The ROC receives quarterly cybersecurity reports, including any reportable incidents, and reviews and approves the Information Security Program at least annually or whenever significant changes are made to the program. These updates include information regarding management’s ongoing efforts to manage cybersecurity risk and the steps management has taken to address and mitigate the evolving cybersecurity threat environment. The ROC members include independent directors from the Board who have expertise in areas relevant to their responsibilities over cybersecurity, including senior leadership experience in financial services and information technology.
Cybersecurity Risk Role of Management [Text Block]	At the management level, the Information Technology Steering Committee has overall responsibility for identifying, assessing, and managing information security risks, including cybersecurity risk. The Information Technology Steering Committee provides cybersecurity reports periodically to the ROC and is comprised of the Company’s senior information technology, information security and third party risk management leaders, including the Chief Risk Officer and Chief Information Security Officer. The Chief Risk Officer is responsible for managing cybersecurity risk and coordinating with the Chief Information Security Officer to ensure the Company’s cybersecurity risk profile is managed in a manner consistent with its risk appetite. The Chief Risk Officer also provides periodic reports to the Board’s ROC, outlining the overall status of the Company’s Information Security Program and its compliance with regulatory guidelines, and coordinating and reporting on incident response. The Chief Information Security Officer is responsible for the day-to-day management of the Information Security Program and Security Incident Response Policy and Plan. The Chief Risk Officer has held various leadership roles at the bank, including over 13 years previously serving as the Company’s Chief Financial Officer. The Chief Information Security Officer has over 20 years of work experience in cybersecurity at financial institutions. The majority of Information Security Team members have over 10 years of cybersecurity experience and cumulatively hold over 50 active professional certifications in related fields.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	At the management level, the Information Technology Steering Committee has overall responsibility for identifying, assessing, and managing information security risks, including cybersecurity risk. The Information Technology Steering Committee provides cybersecurity reports periodically to the ROC and is comprised of the Company’s senior information technology, information security and third party risk management leaders, including the Chief Risk Officer and Chief Information Security Officer. The Chief Risk Officer is responsible for managing cybersecurity risk and coordinating with the Chief Information Security Officer to ensure the Company’s cybersecurity risk profile is managed in a manner consistent with its risk appetite. The Chief Risk Officer also provides periodic reports to the Board’s ROC, outlining the overall status of the Company’s Information Security Program and its compliance with regulatory guidelines, and coordinating and reporting on incident response. The Chief Information Security Officer is responsible for the day-to-day management of the Information Security Program and Security Incident Response Policy and Plan.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	The Chief Risk Officer has held various leadership roles at the bank, including over 13 years previously serving as the Company’s Chief Financial Officer. The Chief Information Security Officer has over 20 years of work experience in cybersecurity at financial institutions. The majority of Information Security Team members have over 10 years of cybersecurity experience and cumulatively hold over 50 active professional certifications in related fields.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	At the management level, the Information Technology Steering Committee has overall responsibility for identifying, assessing, and managing information security risks, including cybersecurity risk. The Information Technology Steering Committee provides cybersecurity reports periodically to the ROC and is comprised of the Company’s senior information technology, information security and third party risk management leaders, including the Chief Risk Officer and Chief Information Security Officer. The Chief Risk Officer is responsible for managing cybersecurity risk and coordinating with the Chief Information Security Officer to ensure the Company’s cybersecurity risk profile is managed in a manner consistent with its risk appetite. The Chief Risk Officer also provides periodic reports to the Board’s ROC, outlining the overall status of the Company’s Information Security Program and its compliance with regulatory guidelines, and coordinating and reporting on incident response. The Chief Information Security Officer is responsible for the day-to-day management of the Information Security Program and Security Incident Response Policy and Plan. The Chief Risk Officer has held various leadership roles at the bank, including over 13 years previously serving as the Company’s Chief Financial Officer. The Chief Information Security Officer has over 20 years of work experience in cybersecurity at financial institutions. The majority of Information Security Team members have over 10 years of cybersecurity experience and cumulatively hold over 50 active professional certifications in related fields.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation — The accounting and reporting policies of the Company conform with the U.S. Generally Accepted Accounting Principles (“GAAP”), applicable guidelines prescribed by regulatory authorities and common practices in the banking industry. The preparation of the Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the Consolidated Financial Statements, income and expenses during the reporting period, and the related disclosures. Actual results could differ materially from those estimates. Certain items on the Consolidated Financial Statements and notes for the prior years have been reclassified to conform to the 2024 presentation.
Principles of Consolidation	Principles of Consolidation — The Consolidated Financial Statements in this Form 10-K include the accounts of East West and its subsidiaries that are majority owned and in which the Company has a controlling financial interest, and variable interest entities (“VIE”) in which the Company has determined to be the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation. The Company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a VIE. Voting interest entities are entities that have sufficient equity and provide the equity investors voting rights that enable them to make significant decisions relating to the entity’s operations. VIEs are entities that, by design, either (1) lack sufficient equity to permit the entity to finance its activities without additional subordinated financial support from other parties, or (2) have equity investors that do not have the ability to make significant decisions relating to the entity’s operations through voting rights, or do not have the obligation to absorb the expected losses, or do not have the right to receive the residual returns of the entity. For a VIE, a controlling financial interest is where the Company has the power to direct the activities of an entity that most significantly impact the entity’s economic performance and has an obligation to absorb losses or the right to receive benefits from the VIE. If it is determined that the Company does not have a variable interest in the entity, no further analysis is required and the entity is not consolidated. The Variable Interest Model applies to all legal entities, including corporations, partnerships, limited liability companies and trusts. For an entity that does not meet the definition of a VIE, the entity is determined to be a voting interest entity. The Company consolidates a voting interest entity if it can exert control over the financial and operating policies of an investee, which can occur if the Company has a more than 50% voting interest in the entity. For unconsolidated voting interest entities or VIE, the Company uses the proportional amortization method (“PAM”), equity, cost or measurement alternative method based on the Company’s voting or economic interest. East West has one wholly-owned subsidiary that is a statutory business trust (the “Trust”). In accordance with the guidance in Financial Accounting Standards Board Accounting Standards Codification (“ASC”) Topic 810, Consolidation, the Trust has not been consolidated by the Company.
Cash and Cash Equivalents	Cash and Cash Equivalents — Cash and cash equivalents include cash on hand, cash items in transit, cash due from the Federal Reserve Bank (“FRB”) of San Francisco and other financial institutions, and federal funds sold with original maturities up to three months.
Interest-Bearing Deposits with Banks	Interest-Bearing Deposits with Banks — Interest-bearing deposits with banks include cash placed with other banks with original maturities greater than three months and less than one year.
Assets Purchased under Resale Agreements and Securities Sold under Repurchase Agreements	Assets Purchased under Resale Agreements and Securities Sold under Repurchase Agreements
Debt Securities and Equity Securities	Debt Securities — Debt securities are recorded on the Consolidated Balance Sheet as of their trade dates. The Company initially classifies its debt securities as trading securities, AFS or HTM debt securities based on management’s intention on the date of the purchase. Debt securities are purchased for liquidity and investment purposes, as part of asset/liability management and other strategic activities. Debt securities for which the Company has the positive intention and ability to hold until maturity are classified as HTM and are carried at amortized cost, net of allowance for credit losses. Debt securities not classified as trading securities or HTM securities are classified as AFS. AFS debt securities are reported at fair value, net of the allowance for credit losses, with unrealized gains and losses recorded in AOCI, net of applicable income taxes. For details of the allowance for credit losses on debt securities, refer to the Allowance for Credit Losses on Available-for-Sale and Held-to-Maturity Debt Securities sections of this note. Interest income, including any amortization of premium or accretion of discount, is included in debt securities of interest and dividend income in the Company’s Consolidated Statement of Income. The Company recognizes realized gains and losses on the sale of AFS debt securities in earnings, using the specific identification method. Upon transfer of a debt security from the AFS to HTM category, the security’s new amortized cost is reset to fair value, reduced by any previous write-offs but excluding any allowance for credit losses. Unrealized gains or losses at the date of transfer of these securities continue to be reported in AOCI and are amortized into interest income over the remaining life of the securities as effective yield adjustments, in a manner consistent with the amortization or accretion of the original purchase premium or discount on the associated security. For transfers of securities from the AFS to HTM category, any allowance for credit losses that was previously recorded under the AFS model is reversed and an allowance for credit losses is subsequently recorded under the HTM debt security model. The reversal and re-establishment of the allowance for credit losses are recorded in the provision for credit losses. Equity Securities — The Company’s equity securities include both marketable and non-marketable equity securities. Marketable equity securities with readily determinable fair values are recorded at fair value with unrealized gains and losses due to changes in fair value; and are included in Other investment income on the Consolidated Statement of Income. Marketable equity securities include mutual fund investments, which are included in Affordable housing partnership, tax credit and CRA investments, net on the Consolidated Balance Sheet. Non-marketable equity securities including tax credit investments, and other equity investments that do not have readily determinable fair values are recorded in Affordable housing partnership, tax credit and CRA investments, net, and Other assets on the Consolidated Balance Sheet and are accounted for under one of the following accounting methods: • Equity Method — When the Company has the ability to exercise significant influence over the investee. • Cost Method — The cost method is applied to restricted equity securities held for membership and regulatory purposes, such as FRB of San Francisco and FHLB stock. These investments are held at their cost minus impairment. If impaired, the carrying value is written down to the fair value of the security. • Measurement Alternative — This method is applied to all remaining non-marketable equity securities. These securities are carried at cost adjusted for impairment, if any, plus or minus observable price changes in orderly transactions of an identical or similar security of the same issuer. The Company’s impairment review for equity method, cost method and measurement alternative securities typically includes an analysis of the facts and circumstances of each security, the intent or requirement to sell the security, the expectations of cash flows, capital needs and the viability of its business model. For equity and cost method investments, the Company reduces the asset’s carrying value when the Company considers declines in value to be other-than-temporary impairment (“OTTI”). For securities accounted for under the measurement alternative, the Company reduces the asset value when the fair value is less than the carrying value, without the consideration of recovery.
Loans Held-for-Sale	Loans Held-for-Sale — Loans are initially classified as loans held-for-sale when they are individually identified as being available for immediate sale and management has committed to a formal plan to sell them. Loans held-for-sale are carried at lower of cost or fair value. Subject to periodic review under the Company’s evaluation process, including asset/liability and credit risk management, the Company may transfer certain loans from held-for-investment to held-for-sale measured at lower of cost or fair value. Any write-downs in the carrying amount of the loan at the date of transfer are recorded as charge-offs to allowance for loan losses. Loan origination fees on loans held-for-sale, net of certain costs in processing and closing the loans, are deferred until the time of sale and are included in the periodic determination of the lower of cost or fair value adjustments and/or the gain or loss recognized at the time of sale. A valuation allowance is established if the fair value of such loans is lower than their cost, with a corresponding charge to noninterest income. If the loan or a portion of the loan cannot be sold, it is subsequently transferred back to the loans held-for-investment portfolio from the loans held-for-sale portfolio at the lower of cost or fair value on the transfer date.
Loans Held-for-Investment	Loans Held-for-Investment — At the time of commitment to originate or purchase a loan, the loan is determined to be held-for-investment if it is the Company’s intent to hold the loan to maturity or for the foreseeable future. Loans held-for-investment are stated at their outstanding principal, reduced by an allowance for loan losses and net of deferred loan fees or costs, or unearned fees on originated loans, net of unamortized premiums or unaccreted discounts on purchased loans. Nonrefundable fees and direct costs associated with the origination or purchase of loans are deferred and netted against outstanding loan balances. The deferred net loan fees and costs are recognized in interest income as an adjustment to yield over the loan term using the effective interest method. Discounts/premiums on purchased loans are accreted/amortized to interest income using the effective interest method over the remaining contractual maturity. Interest on loans is calculated using the simple-interest method on daily balances of the principal amounts outstanding. Generally, loans are placed on nonaccrual status when they become 90 days past due or more. Loans are considered past due when contractually required principal or interest payments have not been made on the due dates. Loans are also placed on nonaccrual status when management believes, after considering economic and business conditions and collection efforts, that the borrower’s financial condition is such that full collection of principal or interest becomes uncertain, regardless of the length of past due status. Once a loan is placed on nonaccrual status, interest accrual is discontinued and all unpaid accrued interest is reversed against interest income. Interest payments received on nonaccrual loans are reflected as a reduction of principal and not as interest income. A loan is returned to accrual status when the borrower has demonstrated a satisfactory payment trend subject to management’s assessment of the borrower’s ability to repay the loan.
Loan Modifications	Loan Modifications — The Company applies the general loan modification guidance provided in ASC 310-20 to all loan modifications, including modifications made to borrowers experiencing financial difficulty. Under ASC 310-20-35-9 to 310-20-35-10, a modification is treated as a new loan only if the following two conditions are met: (1) the terms of the new loan are at least as favorable to the Company as the terms for comparable loans to other customers with similar collection risks; and (2) modifications to the terms of the original loan are more than minor. If either condition is not met, the modification is accounted for as a continuation of the existing loan with any effect of the modification treated as a prospective adjustment to the loan’s effective interest rate. A modification made to borrowers experiencing financial difficulty may vary by program and by borrower-specific characteristics, and may include rate reductions, principal forgiveness, term extensions, and payment delays, and is intended to minimize the Company’s economic loss and to avoid foreclosure or repossession of collateral. The Company applies the same credit loss methodology it uses for similar loans that were not modified.
Troubled Debt Restructuring	Troubled Debt Restructurings — Prior to the adoption of ASU 2022-02, a loan was generally classified as a troubled debt restructuring (“TDR”) when the Company, for economic or legal reasons related to the borrower’s financial difficulties, granted a concession to the borrower that the Company would not otherwise consider. The concessions may be granted in various forms, including a below-market change in the stated interest rate, a reduction in the loan balance or accrued interest, a term extension, a payment forbearance and other actions. Loans with contractual terms that were modified as a TDR and were current at the time of restructuring may remain on accrual status if there was demonstrated performance prior to the restructuring and payment in full under the restructured terms was expected. Otherwise, these loans were placed on nonaccrual status and were reported as nonperforming, until the borrower demonstrated a sustained period of performance, generally six months, and the ability to repay the loan according to the contractual terms. If accruing TDRs ceased to perform in accordance with their modified contractual terms, they were placed on nonaccrual status and reported as nonperforming TDRs. TDRs were included in the quarterly allowance for credit losses valuation process.
Allowance for Credit Losses	Allowance for Loan Losses — The allowance for loan losses is established as management’s estimate of expected credit losses inherent in the Company’s lending activities; it is increased by the provision for credit losses and decreased by net charge-offs. The allowance for loan losses is evaluated quarterly by management based on regular reviews of the collectability of the Company’s loans, and more often if deemed necessary. The Company develops and documents the allowance for loan losses methodology at the portfolio segment level. The commercial loan portfolio is comprised of commercial and industrial (“C&I”), commercial real estate (“CRE”), multifamily residential, and construction and land loans; and the consumer loan portfolio is comprised of single-family residential, home equity lines of credit (“HELOCs”), and other consumer loans. The allowance for loan losses represents the portion of a loan’s amortized cost basis that the Company does not expect to collect due to anticipated credit losses over the loan’s contractual life, adjusted for prepayments. The Company measures the expected loan losses on a collective pool basis when similar risk characteristics exist. Models consisting of quantitative and qualitative components are designed for each pool to develop the expected credit loss estimates. Reasonable and supportable forecast periods vary by loan portfolio. The Company has adopted lifetime loss rate models for the portfolios, which use historical loss rates and forecast economic variables to calculate the expected credit losses for each loan pool. When loans do not share similar risk characteristics, the Company evaluates the loan for expected credit losses on an individual basis. Individually assessed loans include nonaccrual loans. The Company evaluates loans for expected credit losses on an individual basis if, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the original contractual terms of the loan agreement. The amortized cost of loans held-for-investment excludes accrued interest, which is included in Other assets on the Consolidated Balance Sheet. The Company has made an accounting policy election to not recognize an allowance for loan losses for accrued interest receivables as the Company reverses accrued interest if a loan is on nonaccrual status. The allowance for loan losses is reported separately on the Consolidated Balance Sheet and the Provision for credit losses is reported on the Consolidated Statement of Income. Allowance for Unfunded Credit Commitments — The allowance for unfunded credit commitments includes reserves provided for unfunded loan commitments, letters of credit, standby letters of credit (“SBLCs”) and recourse obligations for loans sold. The Company estimates the allowance for unfunded credit commitments over the contractual period in which the entity is exposed to credit risk via a present contractual obligation to extend credit. Within the period of credit exposure, the Company considers both the likelihood that funding will occur, and the expected credit losses on the commitments that are expected to fund over their estimated lives. The allowance for unfunded credit commitments is maintained at a level believed by management to be sufficient to absorb expected credit losses related to unfunded credit facilities. The determination of the adequacy of the allowance is based on periodic evaluations of the unfunded credit facilities. For all off-balance sheet instruments and commitments, the unfunded credit exposure is calculated using assumptions based on the Company's historical utilization experience in related portfolio segments. Loss rates are applied to the calculated exposure balances to estimate the allowance for unfunded credit commitments. Other elements such as credit risk factors for loans outstanding, terms and expiration dates of the unfunded credit facilities, and other pertinent information are considered to determine the adequacy of the allowance. The allowance for unfunded credit commitments is included in the Accrued expenses and other liabilities on the Consolidated Balance Sheet. Changes to the allowance for unfunded credit commitments are included in Provision for credit losses on the Consolidated Income Statements. Allowance for Credit Losses on Available-for-Sale Debt Securities — For each reporting period, each AFS debt security that is in an unrealized loss position is individually analyzed as part of the Company’s ongoing assessments to determine whether a fair value below the amortized cost basis has resulted from a credit loss or other factors. The initial indicator of impairment is a decline in fair value below the amortized cost of the AFS debt security, excluding accrued interest. The Company first considers whether there is a plan to sell the AFS debt security or it is more-likely-than-not that it will be required to sell the AFS debt security before recovery of the amortized cost. In determining whether an impairment is due to credit related factors, the Company considers the severity of the decline in fair value, nature of the security, the underlying collateral, the financial condition of the issuer, changes in the AFS debt security’s ratings and other qualitative factors. For AFS debt securities that are guaranteed or issued by the U.S. government, or government-sponsored enterprises of high credit quality, the Company applies a zero credit loss assumption. When the Company does not intend to sell the impaired AFS debt security and it is more-likely-than-not that the Company will not be required to sell the impaired debt security prior to recovery of its amortized cost basis, the credit component of the unrealized loss of the impaired AFS debt security is recognized as an allowance for credit losses, with a corresponding Provision for credit losses on the Consolidated Statement of Income and the non-credit component is recognized in Other comprehensive income (loss) on the Consolidated Statement of Comprehensive Income, net of applicable taxes. At each reporting period, the Company increases or decreases the allowance for credit losses as appropriate, while limiting reversals of the allowance for credit losses to the extent of the amounts previously recorded. If the Company intends to sell the impaired debt security or it is more-likely-than-not that the Company will be required to sell the impaired debt security prior to recovering its amortized cost basis, the entire impairment amount is recognized as an adjustment to the debt security’s amortized cost basis, with a corresponding Provision for credit losses on the Consolidated Statement of Income. The amortized cost of the Company’s AFS debt securities excludes accrued interest, which is included in Other assets on the Consolidated Balance Sheet. The Company has made an accounting policy election not to recognize an allowance for credit losses for accrued interest receivables on AFS debt securities as the Company reverses any accrued interest if a debt security is impaired. As each AFS debt security has a unique security structure, where the accrual status is clearly determined when certain criteria listed in the terms are met, the Company assesses the default status of each security as defined by the debt security’s specific security structure. Allowance for Credit Losses on Held-to-Maturity Debt Securities — For each major HTM debt security type, the allowance for credit losses is estimated collectively for groups of securities with similar risk characteristics. For securities that do not share similar risk characteristics, the losses are estimated individually. The Company applies a zero credit loss assumption to certain HTM debt securities, including debt securities that are either guaranteed or issued by the U.S. government or government-sponsored enterprises, are highly rated by nationally recognized statistical rating organizations (“NRSROs”), and have a long history of no credit losses. Any expected credit loss is recorded through the allowance for credit losses and deducted from the amortized cost basis of the security, reflecting the net amount the Company expects to collect. The amortized cost of the Company’s HTM debt securities excludes accrued interest, which is included in Other assets on the Consolidated Balance Sheet. The Company has made an accounting policy election not to recognize an allowance for credit losses for accrued interest receivables on HTM debt securities, as the Company reverses any accrued interest against interest income if a debt security is placed on nonaccrual status. The criteria used to place HTM debt securities on nonaccrual are largely similar to those described for loans. Any cash collected on nonaccrual HTM debt securities is applied to reduce the security’s amortized cost basis and not as interest income. Generally, the Company returns an HTM security to accrual status when all delinquent interest and principal become current under the contractual terms of the security, and the collectability of remaining principal and interest is no longer doubtful. Allowance for Collateral-Dependent Financial Assets — A financial asset is considered collateral-dependent if repayment is expected to be provided substantially through the operation or sale of the collateral. The allowance for credit losses is measured on an individual basis for collateral-dependent financial assets and determined by comparing the fair value of the collateral less the cost to sell, to the amortized cost basis of the related financial asset at the reporting date. Other than loans, collateral-dependent financial assets could also include resale agreements. In arrangements which the borrower must continually adjust the collateral securing the asset to reflect changes in the collateral’s fair value (e.g., resale agreements), the Company estimates the expected credit losses on the basis of the unsecured portion of the amortized cost as of the balance sheet date. If the fair value of the collateral is equal to or greater than the amortized cost of the resale agreement, the expected losses would be zero. If the fair value of the collateral is less than the amortized cost of the asset, the expected losses are limited to the difference between the fair value of the collateral and the amortized cost basis of the resale agreement. Allowance for Purchased Credit Deteriorated Assets — Purchased assets that have experienced a more-than-insignificant deterioration in credit quality since origination are deemed Purchased Credit Deteriorated (“PCD”) assets. For PCD HTM debt securities and PCD loans, the company records the allowance for credit losses by grossing up the initial amortized cost, which includes the purchase price and the allowance for credit losses. The expected credit losses of PCD debt securities are measured at the individual security level. The expected credit losses for PCD loans are measured based on the loan’s unpaid principal balance. Under this approach, there is no income statement impact from the acquisition. Subsequent changes in the allowance for credit losses on PCD assets will be recognized in Provision for credit losses on the Consolidated Statement of Income. The non-credit discount or premium will be accreted to interest income based on the effective interest rate on the PCD assets determined after the gross-up for the allowance for credit losses. Allowance for Credit Losses The Company has a current expected credit losses (“CECL”) framework for all financial assets measured at amortized cost and certain off-balance sheet credit exposures. The Company’s allowance for credit losses, which includes both the allowance for loan losses and the allowance for unfunded credit commitments, is calculated with the objective of maintaining a reserve sufficient to absorb losses inherent in our credit portfolios. The measurement of the allowance for credit losses is based on management’s best estimate of lifetime expected credit losses, periodic evaluation of the loan portfolio, lending-related commitments and other relevant factors. The allowance for credit losses is deducted from the amortized cost basis of a financial asset or a group of financial assets so that the balance sheet reflects the net amount the Company expects to collect. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts, deferred fees and costs, and escrow advances. Subsequent changes in expected credit losses are recognized in net income as a provision for, or a reversal of, credit loss expense. The allowance for credit losses estimation involves procedures to consider the unique risk characteristics of the portfolio segments. The majority of the Company’s credit exposures that share risk characteristics with other similar exposures are collectively evaluated. The collectively evaluated loans include performing loans and unfunded credit commitments. If an exposure does not share risk characteristics with other exposures, the Company generally estimates expected credit losses on an individual basis. Allowance for Collectively Evaluated Loans The allowance for collectively evaluated loans consists of a quantitative component that assesses the different risk factors considered in our models and a qualitative component that considers risk factors external to the models. Each of these components are described below. Quantitative Component — The Company applies quantitative methods to estimate loan losses by considering a variety of factors such as historical loss experience, the current credit quality of the portfolio, and an economic outlook over the life of the loan. The Company incorporates forward-looking information using macroeconomic scenarios which include variables that are considered key drivers of increases and decreases in credit losses. The Company utilizes a probability-weighted, multiple-scenario forecast approach. These scenarios may consist of a base forecast representing management's view of the most likely outcome, combined with downside or upside scenarios reflecting possible worsening or improving economic conditions. The quantitative models incorporate a probability-weighted calculation of these macroeconomic scenarios over a reasonable and supportable forecast period. If the life of the loans extends beyond the reasonable and supportable forecast period, the Company will consider historical experience or long-run macroeconomic trends over the remaining life of the loans to estimate the allowance for loan losses. There were no changes to the reasonable and supportable forecast period, except to the C&I segment, and no changes to the reversion to the historical loss experience method in 2024 and 2023. The reasonable and supportable forecast period for the C&I segment changed from 11 quarters to eight quarters due to model redevelopment during the third quarter of 2023. The following table provides key credit risk characteristics and macroeconomic variables that the Company uses to estimate the expected credit losses by portfolio segment: Portfolio Segment Risk Characteristics Macroeconomic Variables C&I Age percentage, size at origination, delinquency status, sector and risk rating Unemployment rate, Gross Domestic Product (“GDP”), and U.S. Treasury rates CRE, Multifamily residential, and Construction and land Delinquency status, maturity date, collateral value, property type, and geographic location Unemployment rate, GDP, and U.S. Treasury rates Single-family residential and HELOCs FICO score, delinquency status, maturity date, collateral value, and geographic location Unemployment rate, GDP, and Home Price Indices Other consumer Loss rate approach Immaterial - Macroeconomic variables are included in the qualitative estimate. Quantitative Component — Allowance for Loan Losses for the Commercial Loan Portfolio The Company’s C&I lifetime loss rate model estimates the loss rate expected over the life of a loan. This loss rate is applied to the amortized cost basis, excluding accrued interest receivable, to determine expected credit losses. The lifetime loss rate model’s reasonable and supportable period spans eight quarters, thereafter immediately reverting to the historical average loss rate, expressed through the loan-level lifetime loss rate. To generate estimates of expected loss at the loan level for CRE, multifamily residential, and construction and land loans, projected probabilities of default (“PDs”) and loss given defaults (“LGDs”) are applied to the estimated exposure at default, considering the term and payment structure of the loan. The forecast of future economic conditions returns to long-run historical economic trends within the reasonable and supportable period. To estimate the life of a loan under both models, the contractual term of the loan is adjusted for estimated prepayments based on historical prepayment experience. Quantitative Component — Allowance for Loan Losses for the Consumer Loan Portfolio For single-family residential and HELOC loans, projected PDs and LGDs are applied to the estimated exposure at default, considering the term and payment structure of the loan, to generate estimates of expected loss at the loan level. The forecast of future economic conditions returns to long-run historical economic trends after the reasonable and supportable period. To estimate the life of a loan for the single-family residential and HELOC loan portfolios, the contractual term of the loan is adjusted for estimated prepayments based on historical prepayment experience. For other consumer loans, the Company uses a loss rate approach. Qualitative Component — The Company considers the following qualitative factors in the determination of the collectively evaluated allowance if these factors have not already been captured by the quantitative model. Such qualitative factors may include, but are not limited to: – loan growth trends; – the volume and severity of past due financial assets, and criticized or adversely classified financial assets; – the Company’s lending policies and procedures, including changes in lending strategies, underwriting standards, collection, write-off and recovery practices; – knowledge of a borrower’s operations; – the quality of the Company’s credit review system; – the experience, ability and depth of the Company’s management and associates; – the effect of other external factors such as the regulatory and legal environments, or changes in technology; – actual and expected changes in international, national, regional, and local economic and business conditions in which the Company operates; and – risk factors in certain industry sectors not captured by the quantitative models. The magnitude of the impact of these factors on the Company’s qualitative assessment of the allowance for credit losses changes from period to period according to changes made by management in its assessment of these factors. The extent to which these factors change may be dependent on whether they are already reflected in quantitative loss estimates during the current period and the extent to which changes in these factors diverge from period to period. While the Company’s allowance methodologies strive to reflect all relevant credit risk factors, there continues to be uncertainty associated with, but not limited to, potential imprecision in the estimation process due to the inherent time lag of obtaining information and normal variations between expected and actual outcomes. The Company may hold additional qualitative reserves that are designed to provide coverage for losses attributable to such risk. Allowance for Individually Evaluated Loans When a loan no longer shares similar risk characteristics with other loans, such as in the case of certain nonaccrual loans, the Company estimates the allowance for loan losses on an individual loan basis. The allowance for loan losses for individually evaluated loans is measured as the difference between the recorded value of the loans and their fair value. For loans evaluated individually, the Company uses one of three different asset valuation measurement methods: (1) the fair value of collateral less costs to sell; (2) the present value of expected future cash flows; or (3) the loan's observable market price. If an individually evaluated loan is determined to be collateral dependent, the Company applies the fair value of the collateral less costs to sell method. If an individually evaluated loan is determined not to be collateral dependent, the Company uses the present value of future cash flows or the observable market value of the loan. • Collateral-Dependent Loans —
Premises and Equipment, Net	Premises and Equipment, Net — The Company’s premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are computed based on the straight-line method over the estimated useful lives of the various classes of assets. The ranges of estimated useful lives for the principal classes of assets are as follows: Premises and Equipment Useful Lives Buildings 25 years Furniture, fixtures and equipment 7 years Leasehold improvements Term of lease or useful life, whichever is shorter The Company reviews its long-lived assets for impairment annually, or when events or changes in circumstances indicate that the carrying amounts of these assets may not be recoverable. An asset is considered impaired when the fair value, which is the expected undiscounted cash flows over the remaining useful life, is less than the net book value. The excess of the net book value over its fair value is charged as impairment loss to noninterest expense.
Goodwill	Goodwill — Goodwill represents the excess of the purchase price over the fair value of net assets acquired in an acquisition. Goodwill is tested for impairment on an annual basis as of December 31, or more frequently as events occur or circumstances change that indicate a potential impairment at the reporting unit level. The Company assesses goodwill for impairment at each operating segment level. The Company organizes its operations into three reporting segments: (1) Consumer and Business Banking; (2) Commercial Banking; and (3) Treasury and Other. For information on how the reporting units are identified and the components are aggregated, see Note 17 — Business Segments to the Consolidated Financial Statements in this Form 10-K. The Company has the option to perform a qualitative assessment of goodwill or elect to bypass the qualitative test and proceed directly to a quantitative test. If the Company performs a qualitative assessment of goodwill to test for impairment and concludes it is more likely than not that a reporting unit’s fair value is greater than its carrying value, quantitative tests are not required. If the qualitative analysis indicates that it is more likely than not that a reporting unit’s fair value is less than its carrying value, the Company is required to perform a quantitative assessment to determine if there is goodwill impairment. Factors considered in the qualitative assessments include but are not limited to macroeconomic conditions, industry and market considerations, financial performance of the respective operating segment and other relevant entity- and reporting-unit specific considerations. A quantitative valuation involves determining the fair value of each reporting unit and comparing the fair value to its corresponding carrying value. Goodwill impairment loss is recorded as a charge to noninterest expense and an adjustment to the carrying value of goodwill. Subsequent reversals of goodwill impairment are not allowed.
Derivatives	Derivatives — As part of its asset/liability management strategy, the Company uses derivative financial instruments to mitigate exposure to interest rate and foreign currency risks, and to assist customers with their risk management objectives. Derivatives utilized by the Company primarily include swaps, forwards and option contracts. Derivative instruments are included in Other assets or Accrued expenses and other liabilities on the Consolidated Balance Sheet at fair value. All derivatives designated as fair value hedges and hedges of the net investments in certain foreign operations are linked to specific hedged items or to groups of specific assets and liabilities on the Consolidated Balance Sheet. Cash flow hedges are linked to the forecasted transactions related to a recognized asset/liability or to groups of recognized assets/liabilities. The related cash flows impacts of derivatives are recognized on the Cash flows from operating activities section on the Consolidated Statement of Cash Flows. The Company uses accounting hedges based on the exposure being hedged as either fair value hedges, cash flow hedges or hedges of the net investments in certain foreign operations. For fair value hedges of interest rate risk, changes in fair value of derivatives are reported in the same line item where the earnings effect of the hedged item is presented, as Interest expense or Interest and dividend income on the Consolidated Statement of Income. Changes in fair value of derivatives designated as hedges of the net investments in foreign operations are recorded as a component of AOCI. For cash flow hedges of floating-rate interest payments or receipts, the change in the fair value of hedges is recognized in AOCI on the Consolidated Balance Sheet and reclassified to earnings in the same period when the hedged cash flows impact earnings. The changes in the fair value of the hedging instrument are recorded in the same income statement line item as the hedged item’s expense or income is recorded. For example, fair value changes of hedged on borrowings are recorded within Interest expense , and fair value changes of hedges on loan assets are recorded as interest income within Interest and dividend income on the Consolidated Statements of Income. To qualify as an accounting hedge under the hedge accounting rules (versus an economic hedge where hedge accounting is not sought), a derivative must be highly effective in offsetting the risk designated as being hedged at the inception and on an ongoing basis. The Company evaluates the hedge effectiveness and formally documents its hedging relationships at inception, including the identification of the hedging instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transaction at the time the derivative contract is executed. Subsequent to inception, on a quarterly basis, the Company assesses whether the derivatives used in hedging transactions are highly effective in offsetting changes in the fair value of the hedged items or the cash flows of attributable hedged risks. The quarterly assessment is performed on both a prospective basis (to reconfirm forward-looking expectations that the hedge will be highly effective) and a retrospective basis (to determine whether the hedging relationship was highly effective). The Company discontinues hedge accounting prospectively when (i) a derivative is no longer highly effective in offsetting the risk being hedged; (ii) a derivative expires, or is sold, terminated or exercised, or (iii) the Company determines that designation of a derivative as a hedge is no longer appropriate. If a fair value hedge is discontinued, the derivative will continue to be recorded on the Consolidated Balance Sheet at fair value with changes in fair value recognized on the Consolidated Statement of Income. When the hedged net investment is discontinued, any amounts that have not yet been recognized in earnings remain in AOCI until the net investment is either sold or substantially liquidated where the changes in the fair value of the derivatives are reclassified out of AOCI into Foreign exchange income on the Consolidated Statement of Income. If a cash flow hedge is discontinued but the hedged forecasted cash flow is still expected to happen, the derivative net gain or loss will remain in AOCI and be reclassified into earnings in the periods in which the hedged forecasted cash flow affects earnings. If a cash flow hedge is discontinued and it becomes probable that the forecasted cash flow is not expected to happen, the derivative net gain or loss will be reclassified into earnings immediately. The Company also offers various interest rate, commodity and foreign exchange derivative products to customers. These derivative contracts are recorded at fair value with changes in fair value recorded in Customer derivative income or Foreign exchange income on the Consolidated Statement of Income. From time to time, the Company obtains equity warrants to purchase preferred and/or common stock of public or private companies it provides loans to as part of the Company’s loan origination process. Separately, the Company granted performance-based restricted stock units (“RSUs”) as part of its consideration for its investment in Rayliant Global Advisors Limited (“Rayliant”) during the third quarter of 2023. The vesting of these performance-based RSUs is contingent on Rayliant meeting certain financial performance targets during the future performance period. These equity contracts are accounted for as derivatives and recorded at fair value in Other assets or Accrued expenses and other liabilities on the Consolidated Balance Sheet with changes in fair value recorded in Lending fees , for equity warrants related to the loan origination process , or Other investment income, for performance-based RSU’s related to Rayliant, on the Consolidated Statement of Income. The Company is exposed to counterparty credit risk, which is the risk that counterparties to the derivative contracts do not perform as expected. Valuation of derivative assets and liabilities reflect the value of the instrument inclusive of the nonperformance risk. The Company uses master netting arrangements to mitigate counterparty credit risk in derivative transactions. To the extent the derivatives are subject to master netting arrangements, the Company takes into account the impact of master netting arrangements that allow the Company to set off all derivative contracts executed with the same counterparty on a net basis, and to offset the net derivative position with the related cash and securities collateral. The Company elects to offset derivative transactions with the same counterparty on the Consolidated Balance Sheet when a derivative transaction has a legally enforceable master netting arrangement and when it is eligible for netting under ASC 210-20-45-1, Balance Sheet Offsetting: Netting Derivative Positions on Balance Sheet. Derivative balances and related cash collateral are presented net on the Consolidated Balance Sheet. In addition, the Company applies the Settlement to Market treatment for the cash variation margin received/pledged on our interest rate and commodity contracts cleared through certain centrally cleared counterparties. As a result, derivative balances with these counterparties are considered settled by the variation margin.
Fair Value	Fair Value — The Company records or discloses certain assets and liabilities at fair value. Fair value is defined as the price that would be received to sell an asset or the price that would be paid to transfer a liability in an orderly transaction between market participants at the measurement date. In determining the fair value of financial instruments, the Company uses various methods including market and income approaches. Based on these approaches, the Company utilizes certain assumptions that market participants would use in pricing an asset or a liability. These inputs can be readily observable, market corroborated or generally unobservable. Fair value measurements are based on the exit price notion that maximizes the use of observable inputs and minimizes the use of unobservable inputs. All inputs, whether observable or unobservable, are ranked in accordance with a prescribed fair value hierarchy that assigns the highest priority to quoted prices in active markets and the lowest priority to prices derived from data lacking transparency. The Company’s assets and liabilities are classified in their entirety based on the lowest level of input that is significant to their fair value measurements. The fair value of the Company’s assets and liabilities is classified and disclosed in one of the following three categories: • Level 1 — Valuation is based on quoted prices for identical instruments traded in active markets. • Level 2 — Valuation is based on quoted prices for similar instruments traded in active markets; quoted prices for identical or similar instruments traded in markets that are not active; and model-derived valuations whose inputs are observable and can be corroborated by market data. • Level 3 — Valuation is based on significant unobservable inputs for determining the fair value of assets or liabilities. These significant unobservable inputs reflect assumptions that market participants may use in pricing the assets or liabilities.
Stock-Based Compensation	Stock-Based Compensation — The Company grants time-based RSUs, which include service conditions for vesting. RSUs that vest in the form of shares of the Company’s common stock are classified as equity. Compensation cost for these time-based awards is based on the quoted market price of the Company’s common stock at the grant date. RSUs that will be settled in cash instead of shares are liability classified awards and compensation cost for these awards is adjusted to fair value based on changes in the Company’s stock price up to the settlement date. In addition, the Company grants performance-based RSUs, which contain additional performance goals and market conditions that are required to be met in order for the awards to vest. Compensation expense for these performance-based RSUs is based on the grant-date fair value considering both performance and market conditions. Subsequently, the Company evaluates the probable outcome of the performance conditions quarterly and makes cumulative adjustments for current and prior periods in compensation expense in the period of change. Market conditions subsequent to the grant date have no impact on the amount of compensation expense. Compensation cost is amortized on a straight-line basis over the requisite service period for the entire award, which is generally the maximum vesting period of the award. Excess tax benefits and deficiencies on share-based payment awards are recognized within Income tax expense
Revenue from Contracts with Customers	Revenue from Contracts with Customers — The Company recognizes two primary types of revenue on its Consolidated Statement of Income: Net interest income and Noninterest income . The Company’s revenue from contracts with customers consists of service charges and fees related to deposit accounts, card income and wealth management fees. These revenue streams as described below comprised 43%, 41% and 41% of total noninterest income for the years ended December 31, 2024, 2023 and 2022, respectively. • Deposit Service Charges and Related Fee Income — The Company offers a range of deposit products to individuals and businesses, which includes savings, money market, checking and time deposit accounts. The deposit account services include ongoing account maintenance, as well as certain optional services such as various in-branch services, automated teller machine/debit card usage, wire transfer services or check orders. In addition, treasury management and business account analysis services are offered to commercial deposit customers. The monthly account fees may vary with the amount of average monthly deposit balances maintained, or the Company may charge a fixed monthly account maintenance fee if certain average balances are not maintained. In addition, each time a deposit customer selects an optional service, the Company may earn transaction fees, generally recognized by the Company at the point when the transaction occurs. For business analysis accounts, commercial deposit customers receive an earnings credit based on their account balance, which can be used to offset the cost of banking and treasury management services. Business analysis accounts that are assessed fees in excess of earnings credits received are typically charged at the end of each month, after all transactions are known and the credits are calculated. Deposit service charges and related fee income are recognized in all operating segments and included in Deposit account fees on the Consolidated Statement of Income. • Card Income — Card income consists of merchant referral fees and interchange income. For merchant referral fees, the Company provides marketing and referral services to acquiring banks for merchant card processing services and earns variable referral fees based on transaction activities. The Company satisfies its performance obligation over time as the Company identifies, solicits, and refers business customers who are provided such services. The Company receives monthly fees net of consideration it pays to the acquiring bank performing the merchant card processing services. The Company recognizes revenue on a monthly basis when the uncertainty associated with the variable referral fees is resolved after the Company receives monthly statements from the acquiring bank. For interchange income, the Company, as a card issuer, has a stand ready performance obligation to authorize, clear, and settle card transactions. The Company earns or pays interchange fees, which are percentage-based on each transaction, and based on rates published by the corresponding payment network for transactions processed using their network. The Company measures its progress toward the satisfaction of its performance obligation over time as services are rendered, and the Company provides continuous access to this service and settles transactions as its customer or the payment network requires. Interchange income is presented net of direct costs paid to the customer and entities in their distribution chain, which are transaction-based expenses such as rewards program expenses and certain network costs. Revenue is recognized when the net profit is determined by the payment networks at the end of each day. Card income is recognized in consumer and business banking, and commercial banking segments and included in Deposit account fees on the Consolidated Statement of Income. • Wealth Management Fees — The Company provides investment planning services for customers including wealth management services, asset allocation strategies, portfolio analysis and monitoring, investment strategies and risk management strategies. The fees the Company earns are variable and are generally received monthly. The Company recognizes revenue for the services performed at quarter-end based on actual transaction details received from the broker-dealer with whom the Company engages. Wealth management fees are recognized in both consumer and business banking, and commercial banking segments
Income Taxes	Income Taxes — The Company files consolidated federal income tax returns, foreign tax returns, and various combined and separate company state tax returns. The calculation of the Company’s income tax provision and related tax accruals requires the use of estimates and judgments. Income tax expense consists of two components: current and deferred. Current tax expense represents taxes to be paid or refunded for the current period and includes income tax expense related to our uncertain tax positions. Income tax liabilities (receivables) represent the estimated amounts due to (due from) the various taxing jurisdictions where the Company has established a tax presence and are reported in Accrued expenses and other liabilities or Other assets on the Consolidated Balance Sheets. Deferred tax expense results from changes in deferred tax assets and liabilities between period, and is determined using the balance sheet method. Under the balance sheet method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax basis of assets and liabilities. Deferred tax assets are also recognized for tax attributes such as net operating loss carryforwards and tax credit carryforwards. Management regularly reviews the Company’s tax positions and deferred tax balances. In concluding whether a valuation allowance is required, the Company considers all available evidence, both positive and negative, based on the more-likely-than-not criteria that such assets will be realized. Factors considered in this analysis include the Company’s ability to generate future taxable income, implement tax-planning strategies (as defined in ASC 740, Income Taxes ) and utilize taxable income from prior carryback years (if such carryback is permitted under the applicable tax law), as well as future reversals of existing taxable temporary differences. To the extent a deferred tax asset is no longer expected more-likely-than-not to be realized, a valuation allowance is established. Deferred tax assets net of deferred tax liabilities are included in Other assets on the Consolidated Balance Sheet. The Company reports a liability for unrecognized tax benefits resulting from uncertain tax positions taken, or expected to be taken, in an income tax return. Uncertain tax positions that meet the more-likely-than-not recognition threshold are measured to determine the amount of benefit to recognize. An uncertain tax position is measured at the largest amount of benefit that management believes has a greater than 50% likelihood of realization upon settlement. Tax benefits not meeting our realization criteria represent unrecognized tax benefits. The Company establishes a liability for potential taxes, interest and penalties related to uncertain tax positions based on facts and circumstances, including the interpretation of existing law, new judicial or regulatory guidance, and the status of tax audits. The Company uses the PAM for affordable housing partnership investments, whereby the associated tax credits are recognized as a reduction to tax expense. Upon the adoption of ASU 2023-02 on January 1, 2024, the Company also began applying the PAM to new markets, historic, production and renewable energy tax credit investments. Under PAM, the Company amortizes the initial cost of the investment in proportion to the income tax credits and other income tax benefits received, and recognizes the amortization in Income tax expense on the Consolidated Statement of Income. The Company also holds investments in other tax credit investments using either equity method or the measurement alternative method of accounting. These tax credits are recognized on the Consolidated Financial Statements to the extent they are utilized on the Company’s income tax returns in the year the credit arises under the flow through method of accounting.
Earnings Per Share	Earnings Per Share — Basic EPS is computed by dividing net income by the weighted-average number of common shares outstanding during each period. Diluted EPS is computed by taking net income, adjusted to remove any fair value changes related to liability-classified contingent equity contracts, divided by the weighted-average number of common shares outstanding during each period, plus any incremental dilutive common share equivalents calculated for outstanding time- and performance-based RSUs and contingently issuable shares using the treasury stock method.
Foreign Currency Translation	Foreign Currency Translation — The Company’s foreign subsidiary in China, East West Bank (China) Limited’s functional currency is in Chinese Renminbi (“RMB”). As a result, assets and liabilities of East West Bank (China) Limited are translated, for the consolidation purpose, from its functional currency into the reporting currency U.S. dollar (“USD”) using period-end spot foreign exchange rates. Revenues and expenses of East West Bank (China) Limited are translated, for the purpose of consolidation, from its functional currency into the reporting currency USD at the transaction date foreign exchange rates. The effects of those translation adjustments are reported in the Foreign currency translation adjustments account within Other comprehensive income (loss) on the Consolidated Statement of Comprehensive Income, net of any related hedged effects. For transactions that are denominated in a currency other than the functional currency, including transactions denominated in the local currencies of foreign operations that use the USD as their functional currency, the effects of changes in exchange rates are reported in Foreign exchange income on the Consolidated Statement of Income.
Accounting Pronouncements Adopted and Recent Account Pronouncement Yet to be Adopted	Accounting Pronouncements Adopted in 2024 Standard Required Date of Adoption Description Effect on Financial Statements ASU 2023-02, Investments — Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method January 1, 2024 ASU 2023-02 expands the scope of the PAM to equity tax credit investment programs if certain conditions are met. Previously, the PAM could only be used for investments in low-income housing tax credit structures. Under this guidance, companies are able to elect, on a tax credit program-by-tax credit program basis, to apply the PAM to all equity investments meeting the criteria in ASC 323-740-25-1. The amendments in this guidance must be applied on a modified retrospective or a retrospective basis. The Company adopted ASU 2023-02 on January 1, 2024, for all tax credit investments under a modified retrospective basis. The impact of the adoption decreased opening retained earnings on January 1, 2024 by $9 million. Accounting Pronouncements Adopted in 2024 (continued) Standard Required Date of Adoption Description Effect on Financial Statements ASU No. 2023-07, Segment Reporting (Topic 280) : Improvements to Reportable Segment Disclosures December 31, 2024 ASU 2023-07 expands the disclosure requirements for reportable segments of public entities by adding the following disclosure requirements: • Requires, on an annual and interim basis, significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”) and included within each reported measure of segment profit or loss. • Requires, on an annual and interim basis, amount and composition of other segment items. This amount reconciles segment revenues, less the significant segment expenses, to the reported measure of segment profit or loss. • Expands the current interim disclosure requirements to require all existing annual disclosures about a reportable segment’s profit or loss and assets also be made on an interim basis. • Clarifies that if a CODM uses more than one measure of segment profit or loss, then the entity may disclose one or more measures, but at least one measure should be that which is most consistent with GAAP measurement principles. • Requires annual disclosure of the title and position of the CODM as well as explanation of how the CODM uses the reported measures in assessing segment performance and allocating resources. The Company adopted ASU 2023-07 on December 31, 2024. The amendments have been applied retrospectively to all prior periods presented. The following standards were adopted on January 1, 2024, but they did not have a material impact on the Company’s Consolidated Financial Statements: • ASU 2023-01, Leases (Topic 842): Common Control Arrangements • ASU 2022-03, Fair Value Measurement (Topic 820) Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions Recent Accounting Pronouncements Yet to be Adopted Standard Required Date of Adoption Description Effect on Financial Statements ASU No. 2023-09, Income Taxes (Topic 740) : Improvements to Income Tax Disclosures December 31, 2025 Early adoption is permitted. ASU 2023-09 amends the disclosure requirements for income taxes, including the requirement for further disaggregation of the income tax rate reconciliation and income taxes paid disclosures. The amendments in this guidance must be applied prospectively, with the option to apply retrospectively. The Company is currently evaluating the impact of this guidance on the Company’s Consolidated Financial Statements. ASU No. 2024-03, Income Statement —Reporting Comprehensive Income — Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses December 31, 2027 Early adoption is permitted. ASU 2024-03 requires public companies to disclose, in interim and annual reporting periods, additional information about certain expenses in the notes to financial statements. Disclosures of disaggregated expenses include the following: • The amounts of (a) purchases of inventory; (b) employee compensation; (c) depreciation; (d) intangible asset amortization; and (e) depreciation, depletion and amortization of capitalized costs related to oil- and gas-producing activities in each relevant expense caption. • A qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively. The Company is currently evaluating the impact of this guidance on the Company’s Consolidated Financial Statements. The following standards were adopted on January 1, 2025, but they did not have a material impact on the Company’s Consolidated Financial Statements: • ASU 2023-05, Business Combinations — Joint Venture Formations (Subtopic 805-60): Recognition and Initial Measurement • ASU 2024-02 , Codification Improvements — Amendments to Remove References to the Concepts Statements
Balance Sheet Offsetting	The Company’s resale and repurchase agreements are transacted under legally enforceable master netting agreements that, in the event of default by the counterparty, provide the Company the right to liquidate securities held and to offset receivables and payables with the same counterparty. The Company nets resale and repurchase transactions with the same counterparty on the Consolidated Balance Sheet when it has a legally enforceable master netting agreement and the transactions are eligible for netting under ASC 210-20-45-11, Balance Sheet Offsetting: Repurchase and Reverse Repurchase Agreements
Credit Quality Indicators	Credit Quality Indicators All loans are subject to the Company’s credit review and monitoring process. For the commercial loan portfolio, loans are risk rated based on an analysis of the borrower’s current payment performance or delinquency, repayment sources, financial and liquidity factors, including industry and geographic considerations. For the consumer loan portfolio, payment performance or delinquency is typically the driving indicator for risk ratings. The Company utilizes internal credit risk ratings to assign each individual loan a risk rating of 1 through 10: • Pass — loans risk rated 1 through 5 are assigned an internal risk rating category of “Pass.” Loans risk rated 1 are typically loans fully secured by cash. Pass loans have sufficient sources of repayment to repay the loan in full, in accordance with all terms and conditions. • Special mention — loans assigned a risk rating of 6 have potential weaknesses that warrant closer attention by management; these are assigned an internal risk rating category of “Special Mention.” • Substandard — loans assigned a risk rating of 7 or 8 have well-defined weaknesses that may jeopardize the full and timely repayment of the loan; these are assigned an internal risk rating category of “Substandard.” • Doubtful — loans assigned a risk rating of 9 have insufficient sources of repayment and a high probability of loss; these are assigned an internal risk rating category of “Doubtful.” • Loss — loans assigned a risk rating of 10 are uncollectible and of such little value that they are no longer considered bankable assets; these are assigned an internal risk rating category of “Loss.” Loan exposures categorized as criticized consist of special mention, substandard, doubtful and loss categories. The Company reviews the internal risk ratings of its loan portfolio on a regular basis, and adjusts the ratings based on changes in the borrowers’ financial status and the collectability of the loans.
Litigation	Litigation — The Company is a party to various legal actions arising in the ordinary course of its business. In accordance with ASC 450, Contingencies

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Schedule of Useful Lives for Premises and Equipment	The ranges of estimated useful lives for the principal classes of assets are as follows: Premises and Equipment Useful Lives Buildings 25 years Furniture, fixtures and equipment 7 years Leasehold improvements Term of lease or useful life, whichever is shorter
Schedule of New Accounting Pronouncements Adopted and Recent Accounting Pronouncements	Accounting Pronouncements Adopted in 2024 Standard Required Date of Adoption Description Effect on Financial Statements ASU 2023-02, Investments — Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method January 1, 2024 ASU 2023-02 expands the scope of the PAM to equity tax credit investment programs if certain conditions are met. Previously, the PAM could only be used for investments in low-income housing tax credit structures. Under this guidance, companies are able to elect, on a tax credit program-by-tax credit program basis, to apply the PAM to all equity investments meeting the criteria in ASC 323-740-25-1. The amendments in this guidance must be applied on a modified retrospective or a retrospective basis. The Company adopted ASU 2023-02 on January 1, 2024, for all tax credit investments under a modified retrospective basis. The impact of the adoption decreased opening retained earnings on January 1, 2024 by $9 million. Accounting Pronouncements Adopted in 2024 (continued) Standard Required Date of Adoption Description Effect on Financial Statements ASU No. 2023-07, Segment Reporting (Topic 280) : Improvements to Reportable Segment Disclosures December 31, 2024 ASU 2023-07 expands the disclosure requirements for reportable segments of public entities by adding the following disclosure requirements: • Requires, on an annual and interim basis, significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”) and included within each reported measure of segment profit or loss. • Requires, on an annual and interim basis, amount and composition of other segment items. This amount reconciles segment revenues, less the significant segment expenses, to the reported measure of segment profit or loss. • Expands the current interim disclosure requirements to require all existing annual disclosures about a reportable segment’s profit or loss and assets also be made on an interim basis. • Clarifies that if a CODM uses more than one measure of segment profit or loss, then the entity may disclose one or more measures, but at least one measure should be that which is most consistent with GAAP measurement principles. • Requires annual disclosure of the title and position of the CODM as well as explanation of how the CODM uses the reported measures in assessing segment performance and allocating resources. The Company adopted ASU 2023-07 on December 31, 2024. The amendments have been applied retrospectively to all prior periods presented. The following standards were adopted on January 1, 2024, but they did not have a material impact on the Company’s Consolidated Financial Statements: • ASU 2023-01, Leases (Topic 842): Common Control Arrangements • ASU 2022-03, Fair Value Measurement (Topic 820) Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions Recent Accounting Pronouncements Yet to be Adopted Standard Required Date of Adoption Description Effect on Financial Statements ASU No. 2023-09, Income Taxes (Topic 740) : Improvements to Income Tax Disclosures December 31, 2025 Early adoption is permitted. ASU 2023-09 amends the disclosure requirements for income taxes, including the requirement for further disaggregation of the income tax rate reconciliation and income taxes paid disclosures. The amendments in this guidance must be applied prospectively, with the option to apply retrospectively. The Company is currently evaluating the impact of this guidance on the Company’s Consolidated Financial Statements. ASU No. 2024-03, Income Statement —Reporting Comprehensive Income — Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses December 31, 2027 Early adoption is permitted. ASU 2024-03 requires public companies to disclose, in interim and annual reporting periods, additional information about certain expenses in the notes to financial statements. Disclosures of disaggregated expenses include the following: • The amounts of (a) purchases of inventory; (b) employee compensation; (c) depreciation; (d) intangible asset amortization; and (e) depreciation, depletion and amortization of capitalized costs related to oil- and gas-producing activities in each relevant expense caption. • A qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively. The Company is currently evaluating the impact of this guidance on the Company’s Consolidated Financial Statements. The following standards were adopted on January 1, 2025, but they did not have a material impact on the Company’s Consolidated Financial Statements: • ASU 2023-05, Business Combinations — Joint Venture Formations (Subtopic 805-60): Recognition and Initial Measurement • ASU 2024-02 , Codification Improvements — Amendments to Remove References to the Concepts Statements

Fair Value Measurement and Fa_2

Fair Value Measurement and Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Schedule of Financial Assets (Liabilities) Measured at Fair Value on a Recurring Basis	The following tables present financial assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2024 and 2023: Assets and Liabilities Measured at Fair Value on a Recurring Basis ($ in thousands) Level 1 Level 2 Level 3 Total Fair Value AFS debt securities: U.S. Treasury securities $ 638,265 $ — $ — $ 638,265 U.S. government agency and U.S. government sponsored enterprise debt securities — 262,587 — 262,587 U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities (1) : Commercial mortgage-backed securities — 426,214 — 426,214 Residential mortgage-backed securities — 7,738,260 — 7,738,260 Municipal securities — 250,153 — 250,153 Non-agency mortgage-backed securities: Commercial mortgage-backed securities — 258,470 — 258,470 Residential mortgage-backed securities — 433,608 — 433,608 Corporate debt securities — 526,166 — 526,166 Foreign government bonds — 233,880 — 233,880 Asset-backed securities — 34,715 — 34,715 Collateralized loan obligations (“CLOs”) — 44,493 — 44,493 Total AFS debt securities $ 638,265 $ 10,208,546 $ — $ 10,846,811 Affordable housing partnership, tax credit and CRA investments, net: Equity securities $ 20,817 $ 4,204 $ — $ 25,021 Total affordable housing partnership, tax credit and CRA investments, net $ 20,817 $ 4,204 $ — $ 25,021 Other assets: Equity securities (2) $ 568 $ — $ — $ 568 Total other assets $ 568 $ — $ — $ 568 Derivative assets: Interest rate contracts $ — $ 385,311 $ — $ 385,311 Foreign exchange contracts — 89,083 — 89,083 Credit contracts — 1 — 1 Equity contracts — — 239 239 Commodity contracts — 48,499 — 48,499 Gross derivative assets $ — $ 522,894 $ 239 $ 523,133 Netting adjustments (3) $ — $ (427,292) $ — $ (427,292) Net derivative assets $ — $ 95,602 $ 239 $ 95,841 Derivative liabilities: Interest rate contracts $ — $ 414,172 $ — $ 414,172 Foreign exchange contracts — 71,254 — 71,254 Equity contracts (4) — — 15,119 15,119 Credit contracts — 12 — 12 Commodity contracts — 45,328 — 45,328 Gross derivative liabilities $ — $ 530,766 $ 15,119 $ 545,885 Netting adjustments (3) $ — $ (112,284) $ — $ (112,284) Net derivative liabilities $ — $ 418,482 $ 15,119 $ 433,601 Refer to footnotes on the following page. Assets and Liabilities Measured at Fair Value on a Recurring Basis ($ in thousands) Level 1 Level 2 Level 3 Total Fair Value AFS debt securities: U.S. Treasury securities $ 1,060,375 $ — $ — $ 1,060,375 U.S. government agency and U.S. government sponsored enterprise debt securities — 364,446 — 364,446 U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities (1) : Commercial mortgage-backed securities — 468,259 — 468,259 Residential mortgage-backed securities — 1,727,594 — 1,727,594 Municipal securities — 261,016 — 261,016 Non-agency mortgage-backed securities: Commercial mortgage-backed securities — 367,516 — 367,516 Residential mortgage-backed securities — 553,671 — 553,671 Corporate debt securities — 502,425 — 502,425 Foreign government bonds — 227,874 — 227,874 Asset-backed securities — 42,300 — 42,300 CLOs — 612,861 — 612,861 Total AFS debt securities $ 1,060,375 $ 5,127,962 $ — $ 6,188,337 Affordable housing partnership, tax credit and CRA investments, net: Equity securities $ 20,509 $ 4,150 $ — $ 24,659 Total affordable housing partnership, tax credit and CRA investments, net $ 20,509 $ 4,150 $ — $ 24,659 Derivative assets: Interest rate contracts $ — $ 473,907 $ — $ 473,907 Foreign exchange contracts — 57,072 — 57,072 Credit contracts — 1 — 1 Equity contracts — — 336 336 Commodity contracts — 79,604 — 79,604 Gross derivative assets $ — $ 610,584 $ 336 $ 610,920 Netting adjustments (3) $ — $ (312,792) $ — $ (312,792) Net derivative assets $ — $ 297,792 $ 336 $ 298,128 Derivative liabilities: Interest rate contracts $ — $ 433,936 $ — $ 433,936 Foreign exchange contracts — 42,564 — 42,564 Equity contract (4) $ — $ — $ 15,119 $ 15,119 Credit contracts — 25 — 25 Commodity contracts — 121,670 — 121,670 Gross derivative liabilities $ — $ 598,195 $ 15,119 $ 613,314 Netting adjustments (3) $ — $ (76,170) $ — $ (76,170) Net derivative liabilities $ — $ 522,025 $ 15,119 $ 537,144 (1) Includes Government National Mortgage Association (“GNMA”) AFS debt securities totaling $7.2 billion and $1.2 billion of fair value as of December 31, 2024 and 2023, respectively. (2) Consists of exchange-traded equity securities. For additional information, see Assets and Liabilities Measured at Fair Value on a Recurring Basis — Equity Securities in Note 2 — Fair Value Measurement and Fair Value of Financial Instruments in this Form 10-K. (3) Represents the balance sheet netting of derivative assets and liabilities and related cash collateral under master netting agreements or similar agreements. See Note 5 — Derivatives to the Consolidated Financial Statements in this Form 10-K for additional information. (4) Equity contracts classified as derivative liabilities consist of performance-based RSUs granted as part of EWBC’s consideration in its investment in Rayliant.
Schedule of Reconciliation of the Beginning and Ending Balances of Equity Contracts Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs (Level 3)	The following table provides a reconciliation of the beginning and ending balances of these equity contracts for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Derivative assets: Equity contracts Beginning balance $ 336 $ 323 $ 215 Total (losses) gains included in earnings (1) (97) (79) 17 Issuances — 92 91 Ending balance $ 239 $ 336 $ 323 Derivative liabilities: Equity contracts (2) Beginning balance $ 15,119 $ — $ — Issuances — 15,119 — Ending balance $ 15,119 $ 15,119 $ — (1) Includes unrealized (losses) gains recorded in Lending fees on the Consolidated Statement of Income. (2) Equity contracts classified as derivative liabilities consist of performance-based RSUs granted as part of EWBC’s consideration in its investment in Rayliant.
Schedule of Quantitative Information About Significant Unobservable Inputs Used in the Valuation of level 3 Fair Value Measurements	The following table presents quantitative information about the significant unobservable inputs used in the valuation of Level 3 fair value measurements as of December 31, 2024 and 2023. The significant unobservable inputs presented in the table below are those that the Company considers significant to the fair value of the Level 3 assets. The Company considers unobservable inputs to be significant if, by their exclusion, the fair value of the Level 3 assets would be impacted by a predetermined percentage change. ($ in thousands) Fair Value Measurements (Level 3) Valuation Technique Unobservable Inputs Range of Inputs Weighted- Average of Inputs December 31, 2024 Derivative assets: Equity contracts $ 239 Black-Scholes option pricing model Equity volatility 38% — 57% 50% (1) Liquidity discount 47% 47% Derivative liabilities: Equity contracts (2) $ 15,119 Internal model Payout % designated based on operating revenue and operating EBITDA of investee 84% 84% December 31, 2023 Derivative assets: Equity contracts $ 336 Black-Scholes option pricing model Equity volatility 37% — 48% 45% (1) Liquidity discount 47% 47% Derivative liabilities: Equity contracts (2) $ 15,119 Internal model Payout % designated based on operating revenue and operating EBITDA of investee 84% 84% (1) Weighted-average of inputs is calculated based on the fair value of equity contracts as of December 31, 2024 and 2023. (2) Equity contracts classified as derivative liabilities consist of performance-based RSUs granted as part of EWBC’s consideration in its investment in Rayliant. The following table presents the quantitative information about the significant unobservable inputs used in the valuation of Level 3 fair value measurements that are measured on a nonrecurring basis as of December 31, 2024 and 2023: ($ in thousands) Fair Value Measurements (Level 3) Valuation Techniques Unobservable Inputs Range of Inputs Weighted-Average of Inputs December 31, 2024 Loans held-for-investment $ 910 Fair value of collateral Discount 50% 50% $ 22,993 Fair value of collateral Contract value NM NM $ 37,583 Fair value of property Selling cost 8% — 20% 10% (1) Affordable housing partnership, tax credit and CRA investments, net $ 5,000 Individual analysis of each investment Expected future tax NM NM OREO $ 19,386 Fair value of property Selling cost 8% 8% December 31, 2023 Loans held-for-investment $ 16,328 Fair value of collateral Discount 15% — 75% 45% (1) $ 3,009 Fair value of collateral Contract value NM NM $ 26,555 Fair value of property Selling cost 8% 8% Affordable housing partnership, tax credit and CRA investments, net $ 868 Individual analysis of each investment Expected future tax NM NM NM - Not meaningful (1) Weighted-average of inputs is based on the relative fair value of the respective assets as of both December 31, 2024 and 2023.
Schedule of Carrying Amounts of Assets That Were Still Held and Had Fair Value Changes Measured on a Nonrecurring Basis	The following tables present the carrying amounts of assets that were still held and had fair value adjustments measured on a nonrecurring basis as of December 31, 2024 and 2023: Assets Measured at Fair Value on a Nonrecurring Basis ($ in thousands) Level 1 Level 2 Level 3 Fair Value Measurements Loans held-for-investment: Commercial: C&I $ — $ — $ 48,384 $ 48,384 CRE: CRE — — 1,678 1,678 Construction and land — — 11,316 11,316 Total commercial — — 61,378 61,378 Consumer: Residential mortgage: Single-family residential — — 108 108 Total consumer — — 108 108 Total loans held-for-investment $ — $ — $ 61,486 $ 61,486 Affordable housing partnership, tax credit and CRA investments, net $ — $ — $ 5,000 $ 5,000 OREO (1) $ — $ — $ 19,386 $ 19,386 (1) Represents the carrying value of OREO property that was written down subsequent to its initial classification as OREO and is included in Other assets on the Consolidated Balance Sheet. Assets Measured at Fair Value on a Nonrecurring Basis ($ in thousands) Level 1 Level 2 Level 3 Fair Value Measurements Loans held-for-investment: Commercial: C&I $ — $ — $ 22,035 $ 22,035 CRE: CRE — — 22,653 22,653 Total commercial — — 44,688 44,688 Consumer: Residential mortgage: HELOCs — — 1,204 1,204 Total consumer — — 1,204 1,204 Total loans held-for-investment $ — $ — $ 45,892 $ 45,892 Affordable housing partnership, tax credit and CRA investments, net $ — $ — $ 868 $ 868
Schedule of (Decrease) Increase in Fair Value of Assets for which a Nonrecurring Fair Value Adjustment Has Been Recognized	The following table presents the change in the fair value of certain assets held at the end of the respective reporting periods, for which a nonrecurring fair value adjustment was recognized for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Loans held-for-investment: Commercial: C&I $ (43,754) $ (6,152) $ (25,996) CRE: CRE (78) (1,183) (7,098) Construction and land (2,289) — — Total CRE (2,367) (1,183) (7,098) Total commercial (46,121) (7,335) (33,094) Consumer: Residential mortgage: Single-family residential (1,392) — — HELOCs — (40) 166 Total residential mortgage (1,392) (40) 166 Total consumer (1,392) (40) 166 Total loans held-for-investment $ (47,513) $ (7,375) $ (32,928) Affordable housing partnership, tax credit and CRA investments, net $ (685) $ (1,140) $ 469 OREO $ (7,735) $ — $ — Other nonperforming assets $ — $ — $ (6,861)
Schedule of the Carrying and Fair Value Estimates Per the Fair Value Hierarchy of Financial Instruments Measured on a Nonrecurring Basis	The following tables present the fair value estimates for financial instruments as of December 31, 2024 and 2023, excluding financial instruments recorded at fair value on a recurring basis as they are included in the tables presented elsewhere in this Note. The carrying amounts in the following tables are recorded on the Consolidated Balance Sheet under the indicated captions, except for accrued interest receivable, restricted equity securities, at cost, and mortgage servicing rights that are included in Other assets , and accrued interest payable which is included in Accrued expenses and other liabilities . These financial instruments are measured on an amortized cost basis on the Company’s Consolidated Balance Sheet. December 31, 2024 ($ in thousands) Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value Financial assets: Cash and cash equivalents $ 5,250,742 $ 5,250,742 $ — $ — $ 5,250,742 Interest-bearing deposits with banks $ 48,198 $ — $ 48,198 $ — $ 48,198 Resale agreements $ 425,000 $ — $ 329,769 $ — $ 329,769 HTM debt securities $ 2,917,413 $ 499,858 $ 1,887,896 $ — $ 2,387,754 Restricted equity securities, at cost $ 165,259 $ — $ 165,259 $ — $ 165,259 Loans held-for-investment, net $ 53,024,585 $ — $ — $ 51,328,254 $ 51,328,254 Mortgage servicing rights $ 5,234 $ — $ — $ 8,822 $ 8,822 Accrued interest receivable $ 316,392 $ — $ 316,392 $ — $ 316,392 Financial liabilities: Demand, checking, savings and money market deposits $ 39,959,251 $ — $ 39,959,251 $ — $ 39,959,251 Time deposits $ 23,215,772 $ — $ 23,225,317 $ — $ 23,225,317 FHLB advances $ 3,500,000 $ — $ 3,497,953 $ — $ 3,497,953 Long-term debt $ 32,001 $ — $ 31,246 $ — $ 31,246 Accrued interest payable $ 61,950 $ — $ 61,950 $ — $ 61,950 December 31, 2023 ($ in thousands) Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value Financial assets: Cash and cash equivalents $ 4,614,984 $ 4,614,984 $ — $ — $ 4,614,984 Interest-bearing deposits with banks $ 10,498 $ — $ 10,498 $ — $ 10,498 Resale agreements $ 785,000 $ — $ 699,056 $ — $ 699,056 HTM debt securities $ 2,956,040 $ 488,551 $ 1,965,420 $ — $ 2,453,971 Restricted equity securities, at cost $ 79,811 $ — $ 79,811 $ — $ 79,811 Loans held-for-sale $ 116 $ — $ 116 $ — $ 116 Loans held-for-investment, net $ 51,542,039 $ — $ — $ 50,256,565 $ 50,256,565 Mortgage servicing rights $ 6,602 $ — $ — $ 9,470 $ 9,470 Accrued interest receivable $ 331,490 $ — $ 331,490 $ — $ 331,490 Financial liabilities: Demand, checking, savings and money market deposits $ 38,048,974 $ — $ 38,048,974 $ — $ 38,048,974 Time deposits $ 18,043,464 $ — $ 18,004,951 $ — $ 18,004,951 BTFP borrowings $ 4,500,000 $ — $ 4,500,000 $ — $ 4,500,000 Long-term debt $ 148,249 $ — $ 150,896 $ — $ 150,896 Accrued interest payable $ 205,430 $ — $ 205,430 $ — $ 205,430

Securities Purchased under Re_2

Securities Purchased under Resale Agreements (Tables)	12 Months Ended
	Dec. 31, 2024
RESALE AND REPURCHASE AGREEMENTS [Abstract]
Schedule of Resale Agreements	The following table presents the resale agreements included on the Consolidated Balance Sheet as of December 31, 2024 and 2023: Gross Amounts Not Offset on the Consolidated Balance Sheet ($ in thousands) Gross Amounts of Recognized Assets Gross Amounts Offset on the Consolidated Balance Sheet Net Amounts of Assets Presented on the Consolidated Balance Sheet Collateral Received (1) Net Amount Resale agreements as of December 31, 2024 $ 425,000 $ — $ 425,000 $ (329,603) $ 95,397 Resale agreements as of December 31, 2023 $ 785,000 $ — $ 785,000 $ (715,358) $ 69,642 (1) Represents the fair value of assets the Company has received under resale agreements, limited for table presentation purposes to the amount of the recognized asset due from each counterparty. The application of collateral cannot reduce the net position below zero. Therefore, excess collateral, if any, is not reflected above.

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Schedule of Debt Securities, Available-for-Sale	The following tables present the amortized cost, gross unrealized gains and losses, and fair value by major categories of AFS and HTM debt securities as of December 31, 2024 and 2023: December 31, 2024 ($ in thousands) Amortized Cost (1) Gross Unrealized Gains Gross Unrealized Losses Fair Value AFS debt securities: U.S. Treasury securities $ 676,300 $ — $ (38,035) $ 638,265 U.S. government agency and U.S. government-sponsored enterprise debt securities 308,220 — (45,633) 262,587 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (2) : Commercial mortgage-backed securities 472,535 886 (47,207) 426,214 Residential mortgage-backed securities 7,974,768 12,278 (248,786) 7,738,260 Municipal securities 287,301 38 (37,186) 250,153 Non-agency mortgage-backed securities: Commercial mortgage-backed securities 294,235 2 (35,767) 258,470 Residential mortgage-backed securities 514,527 — (80,919) 433,608 Corporate debt securities 653,500 — (127,334) 526,166 Foreign government bonds 244,803 2,069 (12,992) 233,880 Asset-backed securities 35,086 — (371) 34,715 CLOs 44,500 — (7) 44,493 Total AFS debt securities 11,505,775 15,273 (674,237) 10,846,811 HTM debt securities U.S. Treasury securities 535,080 — (35,222) 499,858 U.S. government agency and U.S. government-sponsored enterprise debt securities 1,004,479 — (200,259) 804,220 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (3) : Commercial mortgage-backed securities 486,388 — (91,461) 394,927 Residential mortgage-backed securities 703,833 — (155,626) 548,207 Municipal securities 187,633 — (47,091) 140,542 Total HTM debt securities 2,917,413 — (529,659) 2,387,754 Total debt securities $ 14,423,188 $ 15,273 $ (1,203,896) $ 13,234,565 December 31, 2023 ($ in thousands) Amortized Cost (1) Gross Unrealized Gains Gross Unrealized Losses Fair Value AFS debt securities: U.S. Treasury securities $ 1,112,587 $ 101 $ (52,313) $ 1,060,375 U.S. government agency and U.S. government-sponsored enterprise debt securities 412,086 — (47,640) 364,446 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (2) : Commercial mortgage-backed securities 531,377 158 (63,276) 468,259 Residential mortgage-backed securities 1,956,927 380 (229,713) 1,727,594 Municipal securities 297,283 75 (36,342) 261,016 Non-agency mortgage-backed securities: Commercial mortgage-backed securities 409,578 — (42,062) 367,516 Residential mortgage-backed securities 643,335 — (89,664) 553,671 Corporate debt securities 653,501 — (151,076) 502,425 Foreign government bonds 239,333 69 (11,528) 227,874 Asset-backed securities 43,234 — (934) 42,300 CLOs 617,250 — (4,389) 612,861 Total AFS debt securities 6,916,491 783 (728,937) 6,188,337 HTM debt securities: U.S. Treasury securities 529,548 — (40,997) 488,551 U.S. government agency and U.S. government-sponsored enterprise debt securities 1,001,836 — (186,904) 814,932 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (3) : Commercial mortgage-backed securities 493,348 — (88,968) 404,380 Residential mortgage-backed securities 742,436 — (142,119) 600,317 Municipal securities 188,872 — (43,081) 145,791 Total HTM debt securities 2,956,040 — (502,069) 2,453,971 Total debt securities 9,872,531 783 (1,231,006) 8,642,308 (1) Amortized cost excludes accrued interest receivables, which are included in Other assets on the Consolidated Balance Sheet. As of December 31, 2024 and 2023, the accrued interest receivables were $45 million and $44 million, respectively. For the Company’s accounting policy related to debt securities’ accrued interest receivable, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Allowance for Credit Losses on Available-for-Sale Debt Securities and Allowance for Credit Losses on Held-to-Maturity Debt Securities to the Consolidated Financial Statements in this Form 10-K. (2) Includes GNMA AFS debt securities totaling $7.3 billion of amortized cost and $7.2 billion of fair value as of December 31, 2024, and $1.3 billion of amortized cost and $1.2 billion of fair value as of December 31, 2023. (3) Includes GNMA HTM debt securities totaling $86 million of amortized cost and $68 million of fair value as of December 31, 2024, and $92 million of amortized cost and $75 million of fair value as of December 31, 2023.
Schedule of Debt Securities, Held-to-Maturity	The following tables present the amortized cost, gross unrealized gains and losses, and fair value by major categories of AFS and HTM debt securities as of December 31, 2024 and 2023: December 31, 2024 ($ in thousands) Amortized Cost (1) Gross Unrealized Gains Gross Unrealized Losses Fair Value AFS debt securities: U.S. Treasury securities $ 676,300 $ — $ (38,035) $ 638,265 U.S. government agency and U.S. government-sponsored enterprise debt securities 308,220 — (45,633) 262,587 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (2) : Commercial mortgage-backed securities 472,535 886 (47,207) 426,214 Residential mortgage-backed securities 7,974,768 12,278 (248,786) 7,738,260 Municipal securities 287,301 38 (37,186) 250,153 Non-agency mortgage-backed securities: Commercial mortgage-backed securities 294,235 2 (35,767) 258,470 Residential mortgage-backed securities 514,527 — (80,919) 433,608 Corporate debt securities 653,500 — (127,334) 526,166 Foreign government bonds 244,803 2,069 (12,992) 233,880 Asset-backed securities 35,086 — (371) 34,715 CLOs 44,500 — (7) 44,493 Total AFS debt securities 11,505,775 15,273 (674,237) 10,846,811 HTM debt securities U.S. Treasury securities 535,080 — (35,222) 499,858 U.S. government agency and U.S. government-sponsored enterprise debt securities 1,004,479 — (200,259) 804,220 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (3) : Commercial mortgage-backed securities 486,388 — (91,461) 394,927 Residential mortgage-backed securities 703,833 — (155,626) 548,207 Municipal securities 187,633 — (47,091) 140,542 Total HTM debt securities 2,917,413 — (529,659) 2,387,754 Total debt securities $ 14,423,188 $ 15,273 $ (1,203,896) $ 13,234,565 December 31, 2023 ($ in thousands) Amortized Cost (1) Gross Unrealized Gains Gross Unrealized Losses Fair Value AFS debt securities: U.S. Treasury securities $ 1,112,587 $ 101 $ (52,313) $ 1,060,375 U.S. government agency and U.S. government-sponsored enterprise debt securities 412,086 — (47,640) 364,446 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (2) : Commercial mortgage-backed securities 531,377 158 (63,276) 468,259 Residential mortgage-backed securities 1,956,927 380 (229,713) 1,727,594 Municipal securities 297,283 75 (36,342) 261,016 Non-agency mortgage-backed securities: Commercial mortgage-backed securities 409,578 — (42,062) 367,516 Residential mortgage-backed securities 643,335 — (89,664) 553,671 Corporate debt securities 653,501 — (151,076) 502,425 Foreign government bonds 239,333 69 (11,528) 227,874 Asset-backed securities 43,234 — (934) 42,300 CLOs 617,250 — (4,389) 612,861 Total AFS debt securities 6,916,491 783 (728,937) 6,188,337 HTM debt securities: U.S. Treasury securities 529,548 — (40,997) 488,551 U.S. government agency and U.S. government-sponsored enterprise debt securities 1,001,836 — (186,904) 814,932 U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities (3) : Commercial mortgage-backed securities 493,348 — (88,968) 404,380 Residential mortgage-backed securities 742,436 — (142,119) 600,317 Municipal securities 188,872 — (43,081) 145,791 Total HTM debt securities 2,956,040 — (502,069) 2,453,971 Total debt securities 9,872,531 783 (1,231,006) 8,642,308 (1) Amortized cost excludes accrued interest receivables, which are included in Other assets on the Consolidated Balance Sheet. As of December 31, 2024 and 2023, the accrued interest receivables were $45 million and $44 million, respectively. For the Company’s accounting policy related to debt securities’ accrued interest receivable, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Allowance for Credit Losses on Available-for-Sale Debt Securities and Allowance for Credit Losses on Held-to-Maturity Debt Securities to the Consolidated Financial Statements in this Form 10-K. (2) Includes GNMA AFS debt securities totaling $7.3 billion of amortized cost and $7.2 billion of fair value as of December 31, 2024, and $1.3 billion of amortized cost and $1.2 billion of fair value as of December 31, 2023. (3) Includes GNMA HTM debt securities totaling $86 million of amortized cost and $68 million of fair value as of December 31, 2024, and $92 million of amortized cost and $75 million of fair value as of December 31, 2023.
Schedule of Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value	The following tables present the fair value and the associated gross unrealized losses of the Company’s AFS debt securities, aggregated by investment category and the length of time that the securities have been in a continuous unrealized loss position, as of December 31, 2024 and 2023: December 31, 2024 Less Than 12 Months 12 Months or More Total ($ in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses AFS debt securities: U.S. Treasury securities $ — $ — $ 638,265 $ (38,035) $ 638,265 $ (38,035) U.S. government agency and U.S. government-sponsored enterprise debt securities — — 262,587 (45,633) 262,587 (45,633) U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities 2,741 (30) 377,756 (47,177) 380,497 (47,207) Residential mortgage-backed securities 2,719,228 (16,404) 1,528,252 (232,382) 4,247,480 (248,786) Municipal securities 2,763 (95) 245,360 (37,091) 248,123 (37,186) Non-agency mortgage-backed securities: Commercial mortgage-backed securities 10,767 (332) 235,668 (35,435) 246,435 (35,767) Residential mortgage-backed securities — — 433,608 (80,919) 433,608 (80,919) Corporate debt securities — — 526,166 (127,334) 526,166 (127,334) Foreign government bonds — — 87,008 (12,992) 87,008 (12,992) Asset-backed securities — — 34,715 (371) 34,715 (371) CLOs — — 44,493 (7) 44,493 (7) Total AFS debt securities $ 2,735,499 $ (16,861) $ 4,413,878 $ (657,376) $ 7,149,377 $ (674,237) December 31, 2023 Less Than 12 Months 12 Months or More Total ($ in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses AFS debt securities: U.S. Treasury securities $ — $ — $ 623,978 $ (52,313) $ 623,978 $ (52,313) U.S. government agency and U.S. government-sponsored enterprise debt securities — — 364,446 (47,640) 364,446 (47,640) U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities: Commercial mortgage-backed securities — — 463,572 (63,276) 463,572 (63,276) Residential mortgage-backed securities 9,402 (558) 1,661,112 (229,155) 1,670,514 (229,713) Municipal securities 2,825 (15) 254,773 (36,327) 257,598 (36,342) Non-agency mortgage-backed securities: Commercial mortgage-backed securities 2,742 (4) 364,774 (42,058) 367,516 (42,062) Residential mortgage-backed securities — — 553,671 (89,664) 553,671 (89,664) Corporate debt securities — — 502,425 (151,076) 502,425 (151,076) Foreign government bonds 110,955 (144) 88,616 (11,384) 199,571 (11,528) Asset-backed securities — — 42,300 (934) 42,300 (934) CLOs — — 612,861 (4,389) 612,861 (4,389) Total AFS debt securities $ 125,924 $ (721) $ 5,532,528 $ (728,216) $ 5,658,452 $ (728,937)
Schedule of the Gross Realized Gains and Tax Expense, Available-for-Sale	The following table presents the gross realized gains from the sales and impairment write-off of AFS debt securities and the related tax expense (benefit) included in earnings for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Gross realized gains from sales (1) $ 2,069 $ 3,138 $ 1,306 Impairment write-off (1) $ — $ (10,000) $ — Related tax expense (benefit) $ 612 $ (2,029) $ 386 (1) During 2023, the Company recognized $7 million in net losses on AFS securities as a component of Noninterest income in the Company’s Consolidated Statement of Income, consisting of a $10 million impairment write-off on a subordinated debt security, partially offset by a $3 million gain on the sale of the same security.
Schedule of Composition of Interest Income on Debt Securities	The following table presents the composition of interest income on debt securities for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Taxable interest $ 429,003 $ 255,475 $ 179,720 Nontaxable interest 20,062 20,715 19,186 Total interest income on debt securities $ 449,065 $ 276,190 $ 198,906
Schedule of Contractual Maturities of AFS and HTM Debt Securities	The following tables present the contractual maturities, amortized cost, fair value and weighted average yields of AFS and HTM debt securities as of December 31, 2024. Expected maturities will differ from contractual maturities on certain securities as the issuers and borrowers of the underlying collateral may have the right to call or prepay obligations with or without prepayment penalties. ($ in thousands) Within One Year After One Year through Five Years After Five Years through Ten Years After Ten Years Total AFS debt securities: U.S. Treasury securities Amortized cost $ 84,143 $ 592,157 $ — $ — $ 676,300 Fair value 83,367 554,898 — — 638,265 Weighted-average yield (1) 2.23 % 1.06 % — % — % 1.21 % U.S. government agency and U.S. government-sponsored enterprise debt securities Amortized cost 17,972 27,030 201,546 61,672 308,220 Fair value 17,595 25,492 169,448 50,052 262,587 Weighted-average yield (1) 1.06 % 1.13 % 2.01 % 2.00 % 1.87 % U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities Amortized cost 8,037 54,584 125,704 8,258,978 8,447,303 Fair value 7,990 51,845 114,109 7,990,530 8,164,474 Weighted-average yield (1) (2) 3.24 % 2.89 % 2.79 % 5.13 % 5.07 % Municipal securities Amortized cost 5,657 26,502 8,114 247,028 287,301 Fair value 5,558 25,160 7,394 212,041 250,153 Weighted-average yield (1) (2) 2.25 % 2.14 % 3.38 % 2.23 % 2.25 % Non-agency mortgage-backed securities Amortized cost 39,936 7,671 6,220 754,935 808,762 Fair value 39,337 7,605 6,207 638,929 692,078 Weighted-average yield (1) 3.67 % 2.95 % 5.53 % 2.40 % 2.49 % Corporate debt securities Amortized cost — — 349,500 304,000 653,500 Fair value — — 311,947 214,219 526,166 Weighted average yield (1) — % — % 3.50 % 1.97 % 2.79 % Foreign government bonds Amortized cost 26,241 118,562 50,000 50,000 244,803 Fair value 26,305 120,567 49,743 37,265 233,880 Weighted-average yield (1) 3.24 % 2.22 % 5.01 % 1.50 % 2.75 % Asset-backed securities Amortized cost — — — 35,086 35,086 Fair value — — — 34,715 34,715 Weighted-average yield (1) — % — % — % 5.37 % 5.37 % CLOs Amortized cost — — 44,500 — 44,500 Fair value — — 44,493 — 44,493 Weighted average yield (1) — % — % 6.08 % — % 6.08 % Total AFS debt securities Amortized cost $ 181,986 $ 826,506 $ 785,584 $ 9,711,699 $ 11,505,775 Fair value $ 180,152 $ 785,567 $ 703,341 $ 9,177,751 $ 10,846,811 Weighted-average yield (1) 2.62 % 1.40 % 3.26 % 4.70 % 4.33 % ($ in thousands) Within One Year After One Year through Five Years After Five Years through Ten Years After Ten Years Total HTM debt securities: U.S. Treasury securities Amortized cost $ — $ 535,080 $ — $ — $ 535,080 Fair value — 499,858 — — 499,858 Weighted-average yield (1) — % 1.05 % — % — % 1.05 % U.S. government agency and U.S. government-sponsored enterprise debt securities Amortized cost — — 371,825 632,654 1,004,479 Fair value — — 316,243 487,977 804,220 Weighted-average yield (1) — % — % 1.89 % 1.90 % 1.90 % U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities Amortized cost — 3,663 94,280 1,092,278 1,190,221 Fair value — 3,371 80,374 859,389 943,134 Weighted-average yield (1) (2) — % 1.42 % 1.62 % 1.69 % 1.68 % Municipal securities Amortized cost — — — 187,633 187,633 Fair value — — — 140,542 140,542 Weighted-average yield (1) (2) — % — % — % 2.01 % 2.01 % Total HTM debt securities Amortized cost $ — $ 538,743 $ 466,105 $ 1,912,565 $ 2,917,413 Fair value $ — $ 503,229 $ 396,617 $ 1,487,908 $ 2,387,754 Weighted-average yield (1) — % 1.05 % 1.83 % 1.79 % 1.66 % (1) Weighted-average yields are computed based on amortized cost balances. (2) Yields on tax-exempt securities are not presented on a tax-equivalent basis.
Schedule of Restricted Equity Securities	The following table presents the restricted equity securities included in Other assets on the Consolidated Balance Sheet as of December 31, 2024 and 2023: December 31, ($ in thousands) 2024 2023 FRB of San Francisco stock $ 63,930 $ 62,561 FHLB stock 101,329 17,250 Total restricted equity securities $ 165,259 $ 79,811

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional and Fair Values of Derivatives	The following table presents the notional amounts and fair values of the Company’s derivatives as of December 31, 2024 and 2023. Certain derivative contracts are cleared though central clearing organizations where variation margin is applied daily as settlement to the fair values of the contracts. The fair values are presented on a gross basis prior to the application of bilateral collateral and master netting agreements, but after the application of variation margin payments as settlement to fair values of contracts cleared through central clearing organizations. Applying variation margin payments as settlement to the fair values of derivative contracts cleared through the London Clearing House (“LCH”) and the Chicago Mercantile Exchange (“CME”) resulted in reductions in the derivative asset and liability fair values of $17 million and $15 million, respectively, as of December 31, 2024. In comparison, applying variation margin payments as settlement to LCH- and CME-cleared derivative transactions resulted in reductions in both the derivative asset and liability fair values of $43 million as of December 31, 2023. Total derivative asset and liability fair values are adjusted to reflect the effects of legally enforceable master netting agreements and cash collateral received or paid. The resulting net derivative asset and liability fair values are included in Other assets and Accrued expenses and other liabilities , respectively, on the Consolidated Balance Sheet. December 31, 2024 December 31, 2023 Fair Value Fair Value ($ in thousands) Notional Amount Assets Liabilities Notional Amount Assets Liabilities Derivatives designated as hedging instruments: Cash flow hedges: Interest rate contracts $ 5,250,000 $ 5,647 $ 35,211 $ 5,250,000 $ 50,421 $ 13,124 Net investment hedges: Foreign exchange contracts — — — 81,480 3,394 — Total derivatives designated as hedging instruments $ 5,250,000 $ 5,647 $ 35,211 $ 5,331,480 $ 53,815 $ 13,124 Derivatives not designated as hedging instruments: Interest rate contracts $ 17,005,381 $ 379,664 $ 378,961 $ 17,387,909 $ 423,486 $ 420,812 Commodity contracts (1) — 48,499 45,328 — 79,604 121,670 Foreign exchange contracts 5,201,460 89,083 71,254 5,827,149 53,678 42,564 Credit contracts (2) 168,999 1 12 118,391 1 25 Equity contracts — 239 (3) 15,119 (4) — 336 (3) 15,119 (4) Total derivatives not designated as hedging instruments $ 22,375,840 $ 517,486 $ 510,674 $ 23,333,449 $ 557,105 $ 600,190 Gross derivative assets/liabilities $ 523,133 $ 545,885 $ 610,920 $ 613,314 Less: Master netting agreements (111,124) (111,124) (75,534) (75,534) Less: Cash collateral received/paid (316,168) (1,160) (237,258) (636) Net derivative assets/liabilities $ 95,841 $ 433,601 $ 298,128 $ 537,144 (1) The notional amount of the Company’s commodity contracts totaled 20,614 thousand barrels of crude oil and 406,726 thousand units of natural gas, measured in million British thermal units (“MMBTUs”) as of December 31, 2024. In comparison, the notional amount of the Company’s commodity contracts totaled 18,631 thousand barrels of crude oil and 328,844 thousand MMBTUs of natural gas as of December 31, 2023. (2) The notional amount for credit contracts reflects the Company’s pro-rata share of the notional amount in the derivative instruments in RPAs. (3) The Company held equity contracts in eight private companies and no public company as of December 31, 2024, and 11 private companies and one public company as of December 31, 2023. (4) Equity contracts classified as derivative liabilities consist of 349,138 performance-based RSUs granted as part of EWBC’s consideration in its investment in Rayliant. The following table presents the notional amounts and the gross fair values of the interest rate and foreign exchange derivatives entered into with customers and with third-party financial institutions as economic hedges to customers’ positions as of December 31, 2024 and 2023: December 31, 2024 December 31, 2023 Fair Value Fair Value ($ in thousands) Notional Amount Assets Liabilities Notional Amount Assets Liabilities Customer-related positions: Interest rate contracts: Swaps $ 6,854,372 $ 11,828 $ 361,256 $ 6,835,822 $ 25,649 $ 377,388 Written options 1,458,428 — 4,953 1,522,531 — 12,756 Collars and corridors 181,039 80 440 322,732 440 4,481 Subtotal 8,493,839 11,908 366,649 8,681,085 26,089 394,625 Foreign exchange contracts: Forwards and spot 996,486 11,693 24,201 956,618 9,466 6,756 Swaps 1,504,469 16,117 25,366 1,588,491 5,801 18,118 Purchased options — — — 136,000 1,839 — Subtotal 2,500,955 27,810 49,567 2,681,109 17,106 24,874 Total $ 10,994,794 $ 39,718 $ 416,216 $ 11,362,194 $ 43,195 $ 419,499 Economic hedges: Interest rate contracts: Swaps $ 6,872,075 $ 362,323 $ 12,228 $ 6,861,561 $ 380,123 $ 25,731 Purchased options 1,458,428 4,990 — 1,522,531 12,783 — Collars and corridors 181,039 443 84 322,732 4,491 456 Subtotal 8,511,542 367,756 12,312 8,706,824 397,397 26,187 Foreign exchange contracts: Forwards and spot 86,750 2,318 1,738 148,003 292 94 Swaps 2,613,755 58,955 19,949 2,862,037 36,280 15,757 Written options — — — 136,000 — 1,839 Subtotal 2,700,505 61,273 21,687 3,146,040 36,572 17,690 Total $ 11,212,047 $ 429,029 $ 33,999 $ 11,852,864 $ 433,969 $ 43,877 The Company enters into energy commodity contracts with its customers in the oil and gas sector, which allow them to hedge against the risk of fluctuation in energy commodity prices. Offsetting contracts entered with third-party financial institutions are used as economic hedges to manage the Company’s exposure on its customer-related positions. December 31, 2024 December 31, 2023 Fair Value Fair Value (Amounts in thousands) Notional Units Assets Liabilities Notional Units Assets Liabilities Customer-related positions: Commodity contracts: Crude oil: Swaps 4,830 Barrels $ 4,682 $ 6,874 3,277 Barrels $ 3,735 $ 15,445 Collars 5,477 Barrels 1,604 3,362 5,966 Barrels 1,820 5,103 Subtotal 10,307 Barrels 6,286 10,236 9,243 Barrels 5,555 20,548 Natural gas: Swaps 141,736 MMBTUs 13,095 17,708 118,325 MMBTUs 438 73,793 Collars 62,045 MMBTUs 6,061 4,556 45,854 MMBTUs 21 20,400 Written options 1,234 MMBTUs 167 — 1,874 MMBTUs — 233 Subtotal 205,015 MMBTUs 19,323 22,264 166,053 MMBTUs 459 94,426 Total $ 25,609 $ 32,500 $ 6,014 $ 114,974 Economic hedges: Commodity contracts: Crude oil: Swaps 4,830 Barrels $ 4,479 $ 3,893 3,422 Barrels $ 9,166 $ 4,924 Collars 5,477 Barrels 1,547 76 5,966 Barrels 1,685 1,467 Subtotal 10,307 Barrels 6,026 3,969 9,388 Barrels 10,851 6,391 Natural gas: Swaps 139,136 MMBTUs 13,323 5,056 116,463 MMBTUs 49,941 305 Collars 61,341 MMBTUs 3,541 3,650 44,454 MMBTUs 12,565 — Purchased options 1,234 MMBTUs — 153 1,874 MMBTUs 233 — Subtotal 201,711 MMBTUs 16,864 8,859 162,791 MMBTUs 62,739 305 Total $ 22,890 $ 12,828 $ 73,590 $ 6,696 The following table presents the notional amounts and the gross fair values of RPAs sold and purchased outstanding as of December 31, 2024 and 2023: ($ in thousands) December 31, 2024 December 31, 2023 Notional Amount Fair Value Notional Amount Fair Value Assets Liabilities Assets Liabilities RPAs — protection sold (1) $ 133,174 $ — $ 12 $ 93,393 $ — $ 25 RPAs — protection purchased 35,825 1 — 24,998 1 — Total RPAs $ 168,999 $ 1 $ 12 $ 118,391 $ 1 $ 25 (1) All reference entities of the protection sold RPAs were investment grade. The weighted-average remaining maturities were 1.6 years and 2.8 years as of December 31, 2024 and 2023, respectively.
Schedule of Pre-Tax Changes in AOCI from Cash Flows Hedges	The following table presents the pre-tax changes in AOCI from cash flow hedges for the years ended December 31, 2024, 2023 and 2022. The after-tax impact of cash flow hedges on AOCI is shown in Note 15 — Accumulated Other Comprehensive (Loss) Income to the Consolidated Financial Statements in this Form 10-K. Year Ended December 31, ($ in thousands) 2024 2023 2022 Losses recognized in AOCI: Interest rate contracts $ (124,382) $ (5,767) $ (74,069) Gains (losses) reclassified from AOCI into earnings: Interest expense (for cash flow hedges on borrowings) $ — $ 696 $ 3,200 Interest and dividend income (for cash flow hedges on loans) (91,083) (82,153) (7,204) Noninterest income — 1,614 (1) — Total $ (91,083) $ (79,843) $ (4,004) (1) Represents the amounts in AOCI reclassified into earnings resulting from forecasted cash flows that were no longer probable to occur.
Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss)	The following table presents the pre-tax gains (losses) recognized in AOCI on net investment hedges for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Gains recognized in AOCI $ 586 $ 2,571 $ 4,509
Schedule of Net Gains (Losses) Recognized on the Consolidated Statements of Income Related to Derivatives not Designated as Hedging Instruments	The following table presents the net gains (losses) due to fair value changes that are recognized on the Company’s Consolidated Statement of Income related to derivatives not designated as hedging instruments for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) Classification on Consolidated Statement of Income 2024 2023 2022 Derivatives not designated as hedging instruments: Interest rate contracts Customer derivative income $ 549 $ (2,989) $ 13,905 Foreign exchange contracts Foreign exchange income 54,073 52,817 13,799 Credit contracts Customer derivative income — (1) 118 Equity contracts - warrants Lending fees (97) 13 151 Commodity contracts Customer derivative income 929 (25) 48 Net gains $ 55,454 $ 49,815 $ 28,021
Schedule of Gross Derivative Fair Values, the Balance Sheet Netting Adjustments and Net Fair Values on the Consolidated Balance Sheets, As Well As the Cash and Non-Cash Collateral	The following tables present the gross derivative fair values, the balance sheet netting adjustments, and the resulting net fair values recorded on the Consolidated Balance Sheet, as well as the cash and noncash collateral associated with master netting arrangements. The gross amounts of derivative assets and liabilities are presented after the application of variation margin payments as settlements to the fair values of contracts cleared through central counterparty clearing houses, where applicable. The collateral amounts in the following tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of over-collateralization are not shown: ($ in thousands) As of December 31, 2024 Gross Amounts Offset on the Consolidated Balance Sheet Net Amounts Presented on the Consolidated Balance Sheet Gross Amounts Not Offset on the Consolidated Balance Sheet Gross Amounts Recognized (1) Master Netting Arrangements Cash Collateral Received (3) Security Collateral Received (5) Net Amount Derivative assets $ 523,133 $ (111,124) $ (316,168) $ 95,841 $ (55,222) $ 40,619 Gross Amounts Offset on the Consolidated Balance Sheet Net Amounts Presented on the Consolidated Balance Sheet Gross Amounts Not Offset on the Consolidated Balance Sheet Gross Amounts Recognized (2) Master Netting Arrangements Cash Collateral Pledged (4) Security Collateral Pledged (5) Net Amount Derivative liabilities $ 545,885 $ (111,124) $ (1,160) $ 433,601 $ — $ 433,601 ($ in thousands) As of December 31, 2023 Gross Amounts Offset on the Consolidated Balance Sheet Net Amounts Presented on the Consolidated Balance Sheet Gross Amounts Not Offset on the Consolidated Balance Sheet Gross Amounts Recognized (1) Master Netting Arrangements Cash Collateral Received (3) Security Collateral Received (5) Net Amount Derivative assets $ 610,920 $ (75,534) $ (237,258) $ 298,128 $ (246,259) $ 51,869 Gross Amounts Offset on the Consolidated Balance Sheet Net Amounts Presented on the Consolidated Balance Sheet Gross Amounts Not Offset on the Consolidated Balance Sheet Gross Amounts Recognized (2) Master Netting Arrangements Cash Collateral Pledged (4) Security Collateral Pledged (5) Net Amount Derivative liabilities $ 613,314 $ (75,534) $ (636) $ 537,144 $ — $ 537,144 (1) Includes $4 million and $3 million of gross fair value assets with counterparties that were not subject to enforceable master netting arrangements or similar agreements as of December 31, 2024 and 2023, respectively. (2) Includes $27 million and $16 million of gross fair value liabilities with counterparties that were not subject to enforceable master netting arrangements or similar agreements as of December 31, 2024 and 2023, respectively. (3) Gross cash collateral received under master netting arrangements or similar agreements were $322 million and $244 million as of December 31, 2024 and 2023, respectively. Of the gross cash collateral received, $316 million and $237 million were used to offset against derivative assets as of December 31, 2024 and 2023, respectively. (4) Gross cash collateral pledged under master netting arrangements or similar agreements were $1 million as of both December 31, 2024 and 2023. Of the gross cash collateral pledged, $1 million cash collateral was used to offset against derivative liabilities as of both December 31, 2024 and 2023. (5) Represents the fair value of security collateral received or pledged limited to derivative assets or liabilities that are subject to enforceable master netting arrangements or similar agreements. U.S. GAAP does not permit the netting of noncash collateral on the Consolidated Balance Sheet but requires disclosure of such amounts.

Loans Receivable and Allowanc_2

Loans Receivable and Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2024
Loans and Leases Receivable Disclosure [Abstract]
Schedule of the Composition of Loan Held-For-Investment	The following table presents the composition of the Company’s loans held-for-investment outstanding as of December 31, 2024 and 2023: ($ in thousands) December 31, 2024 December 31, 2023 Commercial: C&I $ 17,397,158 $ 16,581,079 CRE: CRE 14,655,340 14,777,081 Multifamily residential 4,953,442 5,023,163 Construction and land 666,162 663,868 Total CRE 20,274,944 20,464,112 Total commercial 37,672,102 37,045,191 Consumer: Residential mortgage: Single-family residential 14,175,446 13,383,060 HELOCs 1,811,628 1,722,204 Total residential mortgage 15,987,074 15,105,264 Other consumer 67,461 60,327 Total consumer 16,054,535 15,165,591 Total loans held-for-investment (1) $ 53,726,637 $ 52,210,782 Allowance for loan losses (702,052) (668,743) Loans held-for-investment, net (1) $ 53,024,585 $ 51,542,039 (1) Includes $46 million and $71 million of net deferred loan fees and net unamortized premiums as of December 31, 2024 and 2023, respectively.
Schedule Of Loans Held-For-Investment By Loan Portfolio Segments, Internal Risk Ratings, Gross Write-Offs And Vintage Year	The following tables summarize the Company’s loans held-for-investment and year-to-date gross write-offs by loan portfolio segments, internal risk ratings and vintage year as of December 31, 2024 and 2023. The vintage year is the year of loan origination, renewal or major modification. Gross write-offs in the following tables are for the years ended December 31, 2024 and 2023. Revolving loans that are converted to term loans presented in the tables below are excluded from the term loans by vintage year columns. December 31, 2024 Term Loans by Origination Year ($ in thousands) 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted to Term Loans (1) Total Commercial: C&I: Pass $ 2,605,928 $ 1,508,948 $ 999,586 $ 612,015 $ 243,528 $ 295,884 $ 10,574,404 $ 23,032 $ 16,863,325 Criticized (accrual) 34,412 51,415 61,041 107,355 10,538 31,160 151,747 — 447,668 Criticized (nonaccrual) 3,822 29,181 20,273 10,666 3,225 9,135 9,863 — 86,165 Total C&I 2,644,162 1,589,544 1,080,900 730,036 257,291 336,179 10,736,014 23,032 17,397,158 Gross write-offs (2) 20 47,963 14,848 11,119 1,568 3,012 27,099 — 105,629 CRE: Pass 1,660,877 2,296,763 3,692,498 1,925,220 1,296,439 3,176,450 96,791 49,302 14,194,340 Criticized (accrual) 34,543 44,557 90,105 31,615 75,578 167,401 — 14,771 458,570 Criticized (nonaccrual) — — — — 1,756 674 — — 2,430 Subtotal CRE 1,695,420 2,341,320 3,782,603 1,956,835 1,373,773 3,344,525 96,791 64,073 14,655,340 Gross write-offs (2) — — — — — 3 — — 3 Multifamily residential: Pass 386,743 521,754 1,337,599 752,230 613,115 1,242,586 14,640 1,253 4,869,920 Criticized (accrual) — — 43,997 32,042 — 2,911 — — 78,950 Criticized (nonaccrual) — — — — — 4,572 — — 4,572 Subtotal multifamily residential 386,743 521,754 1,381,596 784,272 613,115 1,250,069 14,640 1,253 4,953,442 Gross write-offs — — — — — 10 — — 10 Construction and land: Pass 90,926 328,803 184,792 41,932 — 8,393 — — 654,846 Criticized (nonaccrual) — — 11,316 — — — — — 11,316 Subtotal construction and land 90,926 328,803 196,108 41,932 — 8,393 — — 666,162 Gross write-offs — — 2,289 — — — — — 2,289 Total CRE 2,173,089 3,191,877 5,360,307 2,783,039 1,986,888 4,602,987 111,431 65,326 20,274,944 Total CRE gross write-offs (2) — — 2,289 — — 13 — — 2,302 Total commercial $ 4,817,251 $ 4,781,421 $ 6,441,207 $ 3,513,075 $ 2,244,179 $ 4,939,166 $ 10,847,445 $ 88,358 $ 37,672,102 Total commercial gross write-offs (2) $ 20 $ 47,963 $ 17,137 $ 11,119 $ 1,568 $ 3,025 $ 27,099 $ — $ 107,931 December 31, 2024 Term Loans by Origination Year ($ in thousands) 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted to Term Loans (1) Total Consumer: Residential mortgage: Single-family residential: Pass (3) $ 2,360,674 $ 2,762,921 $ 3,074,668 $ 2,079,323 $ 1,407,031 $ 2,437,446 $ — $ — $ 14,122,063 Criticized (accrual) 4,175 3,409 750 5,810 1,548 6,069 — — 21,761 Criticized (nonaccrual) (3) 2,716 9,673 1,929 2,035 2,404 12,865 — — 31,622 Subtotal single-family residential mortgage 2,367,565 2,776,003 3,077,347 2,087,168 1,410,983 2,456,380 — — 14,175,446 Gross write-offs (2) 9 — — — — — — — 9 HELOCs: Pass 7,453 3,288 4,071 3,236 7,570 8,152 1,648,337 99,488 1,781,595 Criticized (accrual) 1,436 — 1,420 — 135 2,064 2,338 594 7,987 Criticized (nonaccrual) 3,161 3,095 2,520 39 418 7,301 — 5,512 22,046 Subtotal HELOCs 12,050 6,383 8,011 3,275 8,123 17,517 1,650,675 105,594 1,811,628 Gross write-offs — 10 — — — — — 5 15 Total residential mortgage 2,379,615 2,782,386 3,085,358 2,090,443 1,419,106 2,473,897 1,650,675 105,594 15,987,074 Total residential mortgage gross write-offs (2) 9 10 — — — — — 5 24 Other consumer: Pass 14,916 — 22,992 132 — 6,800 22,555 — 67,395 Criticized (nonaccrual) — — — — — — 66 — 66 Total other consumer 14,916 — 22,992 132 — 6,800 22,621 — 67,461 Gross write-offs (2) — 3,000 — — — — 890 — 3,890 Total consumer $ 2,394,531 $ 2,782,386 $ 3,108,350 $ 2,090,575 $ 1,419,106 $ 2,480,697 $ 1,673,296 $ 105,594 $ 16,054,535 Total consumer gross write-offs (2) $ 9 $ 3,010 $ — $ — $ — $ — $ 890 $ 5 $ 3,914 Total loans held-for-investment: Pass $ 7,127,517 $ 7,422,477 $ 9,316,206 $ 5,414,088 $ 3,567,683 $ 7,175,711 $ 12,356,727 $ 173,075 $ 52,553,484 Criticized (accrual) 74,566 99,381 197,313 176,822 87,799 209,605 154,085 15,365 1,014,936 Criticized (nonaccrual) 9,699 41,949 36,038 12,740 7,803 34,547 9,929 5,512 158,217 Total $ 7,211,782 $ 7,563,807 $ 9,549,557 $ 5,603,650 $ 3,663,285 $ 7,419,863 $ 12,520,741 $ 193,952 $ 53,726,637 Total loans held-for-investment gross write-offs (2) $ 29 $ 50,973 $ 17,137 $ 11,119 $ 1,568 $ 3,025 $ 27,989 $ 5 $ 111,845 December 31, 2023 Term Loans by Origination Year ($ in thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans Converted to Term Loans (1) Total Commercial: C&I: Pass $ 2,314,463 $ 1,628,560 $ 1,296,936 $ 331,982 $ 245,173 $ 164,159 $ 10,053,757 $ 20,143 $ 16,055,173 Criticized (accrual) 105,119 67,899 120,574 15,064 40,920 22,098 117,196 — 488,870 Criticized (nonaccrual) 2,104 7,916 131 4,819 2,979 18,137 950 — 37,036 Total C&I 2,421,686 1,704,375 1,417,641 351,865 289,072 204,394 10,171,903 20,143 16,581,079 Gross write-offs (2) 350 10,454 424 3,758 9,748 2,648 1,593 — 28,975 CRE: Pass 2,492,915 4,086,385 2,216,257 1,428,724 1,600,844 2,494,382 92,851 62,771 14,475,129 Criticized (accrual) 36,855 34,485 30,336 48,250 24,437 104,340 — — 278,703 Criticized (nonaccrual) — — — — 444 22,805 — — 23,249 Subtotal CRE 2,529,770 4,120,870 2,246,593 1,476,974 1,625,725 2,621,527 92,851 62,771 14,777,081 Gross write-offs (2) — — — — — 1,329 — — 1,329 Multifamily residential: Pass 665,780 1,481,161 808,333 612,408 498,491 857,713 8,690 1,281 4,933,857 Criticized (accrual) — 3,356 54,614 — 693 25,974 — — 84,637 Criticized (nonaccrual) — — — — — 4,669 — — 4,669 Subtotal multifamily residential 665,780 1,484,517 862,947 612,408 499,184 888,356 8,690 1,281 5,023,163 Gross write-offs — — — — — 3 — — 3 Construction and land: Pass 209,775 280,151 120,724 39,928 808 5,501 6,981 $ — 663,868 Subtotal construction and land 209,775 280,151 120,724 39,928 808 5,501 6,981 — 663,868 Total CRE 3,405,325 5,885,538 3,230,264 2,129,310 2,125,717 3,515,384 108,522 64,052 20,464,112 Total CRE gross write-offs (2) — — — — — 1,332 — — 1,332 Total commercial $ 5,827,011 $ 7,589,913 $ 4,647,905 $ 2,481,175 $ 2,414,789 $ 3,719,778 $ 10,280,425 $ 84,195 $ 37,045,191 Total commercial gross write-offs (2) $ 350 $ 10,454 $ 424 $ 3,758 $ 9,748 $ 3,980 $ 1,593 $ — $ 30,307 December 31, 2023 Term Loans by Origination Year ($ in thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans Converted to Term Loans (1) Total Consumer: Residential mortgage: Single-family residential: Pass (3) $ 3,188,830 $ 3,340,789 $ 2,279,802 $ 1,594,525 $ 980,686 $ 1,959,974 $ — $ — $ 13,344,606 Criticized (accrual) 2,680 4,471 566 1,440 1,503 4,167 — — 14,827 Criticized (nonaccrual) (3) 4,466 837 3,902 2,081 3,626 8,715 — — 23,627 Subtotal single-family residential mortgage 3,195,976 3,346,097 2,284,270 1,598,046 985,815 1,972,856 — — 13,383,060 HELOCs: Pass 3,641 3,882 1,734 3,153 729 9,251 1,551,074 126,280 1,699,744 Criticized (accrual) 565 1,219 1,872 101 185 1,470 2,548 1,089 9,049 Criticized (nonaccrual) 815 856 413 72 584 6,863 279 3,529 13,411 Subtotal HELOCs 5,021 5,957 4,019 3,326 1,498 17,584 1,553,901 130,898 1,722,204 Gross write-offs (2) — — — — — 41 — 6 47 Total residential mortgage 3,200,997 3,352,054 2,288,289 1,601,372 987,313 1,990,440 1,553,901 130,898 15,105,264 Total residential mortgage gross write-offs (2) — — — — — 41 — 6 47 Other consumer: Pass 2,286 18,098 135 — — 13,244 26,432 — 60,195 Criticized (nonaccrual) — — — — — — 132 — 132 Total other consumer 2,286 18,098 135 — — 13,244 26,564 — 60,327 Total consumer $ 3,203,283 $ 3,370,152 $ 2,288,424 $ 1,601,372 $ 987,313 $ 2,003,684 $ 1,580,465 $ 130,898 $ 15,165,591 Total consumer gross write-offs (2) $ — $ — $ — $ — $ — $ 41 $ — $ 6 $ 47 Total by Risk Rating: Pass $ 8,877,690 $ 10,839,026 $ 6,723,921 $ 4,010,720 $ 3,326,731 $ 5,504,224 $ 11,739,785 $ 210,475 $ 51,232,572 Criticized (accrual) 145,219 111,430 207,962 64,855 67,738 158,049 119,744 1,089 876,086 Criticized (nonaccrual) 7,385 9,609 4,446 6,972 7,633 61,189 1,361 3,529 102,124 Total $ 9,030,294 $ 10,960,065 $ 6,936,329 $ 4,082,547 $ 3,402,102 $ 5,723,462 $ 11,860,890 $ 215,093 $ 52,210,782 Total loans held-for-investment gross write-offs (2) $ 350 $ 10,454 $ 424 $ 3,758 $ 9,748 $ 4,021 $ 1,593 $ 6 $ 30,354 (1) $7 million of total commercial loans, comprised of CRE and C&I revolving loans, were converted to term loans during the year ended December 31, 2024. In comparison, $29 million and $26 million of total commercial loans, primarily comprised of CRE revolving loans, were converted to term loans during the years ended December 31, 2023 and 2022, respectively. During the years ended December 31, 2024 and 2023, respectively, $22 million and $44 million of total consumer loans, comprised of HELOCs, were converted to term loans. For the year ended December 31, 2022, no consumer loans were converted to term loans. (2) Excludes gross write-offs associated with loans the Company sold or settled. (3) As of each of December 31, 2024 and 2023, $1 million of nonaccrual loans whose payments were guaranteed by the Federal Housing Administration were classified with a “Pass” rating.
Schedule of Aging Analysis of Loans	The following tables present the aging analysis of loans held-for-investment as of December 31, 2024 and 2023: December 31, 2024 ($ in thousands) Current Accruing Loans Accruing Loans 30-59 Days Past Due Accruing Loans 60-89 Days Past Due Total Accruing Past Due Loans Total Nonaccrual Loans Total Loans Commercial: C&I $ 17,288,138 $ 5,690 $ 17,165 $ 22,855 $ 86,165 $ 17,397,158 CRE: CRE 14,647,270 3,755 1,885 5,640 2,430 14,655,340 Multifamily residential 4,947,939 653 278 931 4,572 4,953,442 Construction and land 653,919 927 — 927 11,316 666,162 Total CRE 20,249,128 5,335 2,163 7,498 18,318 20,274,944 Total commercial 37,537,266 11,025 19,328 30,353 104,483 37,672,102 Consumer: Residential mortgage: Single-family residential 14,088,086 32,841 22,096 54,937 32,423 14,175,446 HELOCs 1,770,218 11,396 7,968 19,364 22,046 1,811,628 Total residential mortgage 15,858,304 44,237 30,064 74,301 54,469 15,987,074 Other consumer 67,288 92 15 107 66 67,461 Total consumer 15,925,592 44,329 30,079 74,408 54,535 16,054,535 Total $ 53,462,858 $ 55,354 $ 49,407 $ 104,761 $ 159,018 $ 53,726,637 December 31, 2023 ($ in thousands) Current Accruing Loans Accruing Loans 30-59 Days Past Due Accruing Loans 60-89 Days Past Due Total Accruing Past Due Loans Total Nonaccrual Loans Total Loans Commercial: C&I $ 16,508,394 $ 28,550 $ 7,099 $ 35,649 $ 37,036 $ 16,581,079 CRE: CRE 14,750,315 1,719 1,798 3,517 23,249 14,777,081 Multifamily residential 5,017,897 597 — 597 4,669 5,023,163 Construction and land 650,617 13,251 — 13,251 — 663,868 Total CRE 20,418,829 15,567 1,798 17,365 27,918 20,464,112 Total commercial 36,927,223 44,117 8,897 53,014 64,954 37,045,191 Consumer: Residential mortgage: Single-family residential 13,313,455 29,285 15,943 45,228 24,377 13,383,060 HELOCs 1,687,301 12,266 9,226 21,492 13,411 1,722,204 Total residential mortgage 15,000,756 41,551 25,169 66,720 37,788 15,105,264 Other consumer 56,930 3,123 142 3,265 132 60,327 Total consumer 15,057,686 44,674 25,311 69,985 37,920 15,165,591 Total $ 51,984,909 $ 88,791 $ 34,208 $ 122,999 $ 102,874 $ 52,210,782
Schedule of Amortized Cost of Loans on Nonaccrual Status with No Related Allowance for Loan Losses	The following table presents the amortized cost of loans on nonaccrual status for which there was no related allowance for loan losses as of December 31, 2024 and 2023. Nonaccrual loans may not have an allowance for credit losses if the loan balances are well secured by collateral values and there is no loss expectation. ($ in thousands) December 31, 2024 December 31, 2023 Commercial: C&I $ 79,591 $ 33,089 CRE — 22,653 Multifamily residential 4,210 4,235 Construction and land 11,316 — Total commercial 95,117 59,977 Consumer: Single-family residential 6,279 4,852 HELOCs 15,380 7,256 Total consumer 21,659 12,108 Total nonaccrual loans with no related allowance for loan losses $ 116,776 $ 72,085
Schedule of Modified Loans	The following tables present the amortized cost of loans that were modified during the years ended December 31, 2024 and 2023 by loan class and modification type: Year Ended December 31, 2024 Modification Type ($ in thousands) Term Extension Payment Delay Combination: Term Extension/ Payment Delay Combination: Rate Reduction/ Term Extension Combination: Rate Reduction/ Payment Delay Total Modification as a % of Loan Class Commercial: C&I $ 57,102 $ 26,420 $ — $ — $ — $ 83,522 0.48 % CRE 86,258 — — 6,052 — 92,310 0.63 % Total commercial 143,360 26,420 — 6,052 — 175,832 Consumer: Single-family residential — 15,397 222 — 140 15,759 0.11 % HELOCs — 14,303 — — 517 14,820 0.82 % Total consumer — 29,700 222 — 657 30,579 Total $ 143,360 $ 56,120 $ 222 $ 6,052 $ 657 $ 206,411 Year Ended December 31, 2023 Modification Type ($ in thousands) Term Extension Payment Delay Combination: Term Extension/ Payment Delay Combination: Rate Reduction/ Term Extension Combination: Rate Reduction/ Payment Delay Total Modification as a % of Loan Class Commercial: C&I $ 62,704 $ 6,842 $ — $ — $ — $ 69,546 0.42 % CRE 13,939 — — 32,470 — 46,409 0.31 % Total commercial 76,643 6,842 — 32,470 — 115,955 Consumer: Single-family residential — 10,202 3,967 — — 14,169 0.11 % HELOCs — 3,148 1,170 — 815 5,133 0.30 % Total consumer — 13,350 5,137 — 815 19,302 Total $ 76,643 $ 20,192 $ 5,137 $ 32,470 $ 815 $ 135,257 The following tables present the financial effects of the loan modifications for the years ended December 31, 2024 and 2023 by loan class and modification type: Financial Effects of Loan Modifications Year Ended December 31, 2024 ($ in thousands) Weighted-Average Interest Rate Reduction Weighted-Average Term Extension (in years) Weighted-Average Payment Delay Commercial: C&I — % 2.1 1.7 CRE 1.28 % 2.7 — Consumer: Single-family residential 1.63 % 10.0 1.3 HELOCs 0.25 % — 1.7 Financial Effects of Loan Modifications Year Ended December 31, 2023 ($ in thousands) Principal Forgiveness Weighted-Average Interest Rate Reduction Weighted-Average Term Extension (in years) Weighted-Average Payment Delay Commercial: C&I $ 371 (1) — % (1) 1.3 0.9 CRE — 3.00 % 2.1 — Consumer: Single-family residential — — % 9.3 1.8 HELOCs — 0.11 % 14.2 4.6 Total $ 371 (1) Comprised of C&I loans modified during the year ended December 31, 2023 where the interest rate was waived in addition to principal forgiveness. No recorded investment was outstanding as of December 31, 2023. Loans Modified Subsequently Defaulted During the Year Ended December 31, 2024 ($ in thousands) Term Extension Payment Delay Combination: Rate Reduction/ Payment Delay Combination: Term Extension/ Payment Delay Total Commercial: C&I $ 3,684 $ 4,937 $ — $ — $ 8,621 Total commercial 3,684 4,937 — — 8,621 Consumer: Single-family residential — 10,223 141 2,462 12,826 HELOCs — 4,690 517 — 5,207 Total consumer — 14,913 658 2,462 18,033 Total $ 3,684 $ 19,850 $ 658 $ 2,462 $ 26,654 Loans Modified Subsequently Defaulted During the Year Ended December 31, 2023 ($ in thousands) Term Extension Payment Delay Combination: Rate Reduction/ Payment Delay Combination: Term Extension/ Payment Delay Total Consumer: Single-family residential $ — $ 267 $ — $ — $ 267 HELOCs — 749 — — 749 Total consumer — 1,016 — — 1,016 Total $ — $ 1,016 $ — $ — $ 1,016 The following table presents the additions to TDRs for the year ended December 31, 2022: Loans Modified as TDRs During the Year Ended December 31, 2022 ($ in thousands) Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) Financial Impact (2) Commercial: C&I 7 $ 69,050 $ 38,415 $ 12,638 Total commercial 7 69,050 38,415 12,638 Consumer: HELOCs 2 662 697 2 Total consumer 2 662 697 2 Total 9 $ 69,712 $ 39,112 $ 12,640 (1) Includes subsequent payments after modification and reflects the balance as of December 31, 2022. (2) Includes charge-offs and specific reserves recorded since the modification date. Loans modified more than once are reported in the period they were first modified. The following table presents the TDR post-modification outstanding balances by the primary modification type for the year ended December 31, 2022: Modification Type During the Year Ended December 31, 2022 ($ in thousands) Principal (1) Other (2) Total Commercial: C&I $ 24,238 $ 14,177 $ 38,415 Total commercial 24,238 14,177 38,415 Consumer: HELOCs 697 — 697 Total consumer 697 — 697 Total $ 24,935 $ 14,177 $ 39,112 (1) Includes forbearance payments, term extensions and principal deferments that modify the terms of the loan from principal and interest payments to interest payments only. (2) Includes primarily funding to secure additional collateral and provide liquidity to collateral-dependent and term extension to C&I loans.
Schedule of Financing Receivable, Modified, Payment Performance	The following table presents the performance of loans that were modified during the years ended December 31, 2024 and 2023, respectively. Payment Performance as of December 31, 2024 ($ in thousands) Current 30-89 Days Past Due 90+ Days Past Due Total Commercial: C&I $ 71,324 $ 12,198 $ — $ 83,522 CRE 92,310 — — 92,310 Total commercial 163,634 12,198 — 175,832 Consumer: Single-family residential 9,082 4,218 2,459 15,759 HELOCs 8,591 3,069 3,160 14,820 Total consumer 17,673 7,287 5,619 30,579 Total $ 181,307 $ 19,485 $ 5,619 $ 206,411 Payment Performance as of December 31, 2023 ($ in thousands) Current 30-89 Days Past Due 90+ Days Past Due Total Commercial: C&I $ 52,087 $ 8,153 $ 9,306 $ 69,546 CRE 46,409 — — 46,409 Total commercial 98,496 8,153 9,306 115,955 Consumer: Single-family residential 11,197 2,425 547 14,169 HELOCs 4,207 177 749 5,133 Total consumer 15,404 2,602 1,296 19,302 Total $ 113,900 $ 10,755 $ 10,602 $ 135,257
Schedule of TDR Loans Subsequently Defaulted	The following table presents information on loans that entered into default during the year ended December 31, 2022 that were modified as TDRs during the 12 months preceding payment default: Loans Modified as TDRs that Subsequently During the Year Ended December 31, 2022 ($ in thousands) Number of Loans Recorded Investment Commercial: C&I 2 $ 10,296 Total commercial 2 10,296 Total 2 $ 10,296
Schedule of Financing Receivable Credit Quality Indicators, Key Credit Risk Characteristics and Macroeconomic Variables	The following table provides key credit risk characteristics and macroeconomic variables that the Company uses to estimate the expected credit losses by portfolio segment: Portfolio Segment Risk Characteristics Macroeconomic Variables C&I Age percentage, size at origination, delinquency status, sector and risk rating Unemployment rate, Gross Domestic Product (“GDP”), and U.S. Treasury rates CRE, Multifamily residential, and Construction and land Delinquency status, maturity date, collateral value, property type, and geographic location Unemployment rate, GDP, and U.S. Treasury rates Single-family residential and HELOCs FICO score, delinquency status, maturity date, collateral value, and geographic location Unemployment rate, GDP, and Home Price Indices Other consumer Loss rate approach Immaterial - Macroeconomic variables are included in the qualitative estimate.
Schedule Of Activity In The Allowance For Credit Losses	The following tables summarize the activity in the allowance for loan losses by portfolio segments for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, 2024 Commercial Consumer CRE Residential Mortgage ($ in thousands) C&I CRE Multifamily Residential Construction and Land Single-Family Residential HELOCs Other Consumer Total Allowance for loan losses, beginning of period $ 392,685 $ 170,592 $ 34,375 $ 10,469 $ 55,018 $ 3,947 $ 1,657 $ 668,743 Provision for (reversal of) credit losses on loans (a) 110,791 61,908 (2,684) 9,114 (10,176) (873) 4,096 172,176 Gross charge-offs (125,413) (14,236) (10) (2,289) (35) (15) (4,259) (146,257) Gross recoveries 6,505 413 436 203 9 73 — 7,639 Total net (charge-offs) recoveries (118,908) (13,823) 426 (2,086) (26) 58 (4,259) (138,618) Foreign currency translation adjustment (249) — — — — — — (249) Allowance for loan losses, end of period $ 384,319 $ 218,677 $ 32,117 $ 17,497 $ 44,816 $ 3,132 $ 1,494 $ 702,052 Year Ended December 31, 2023 Commercial Consumer CRE Residential Mortgage ($ in thousands) C&I CRE Multifamily Residential Construction and Land Single-Family Residential HELOCs Other Consumer Total Allowance for loan losses, December 31, 2022 $ 371,700 $ 149,864 $ 23,373 $ 9,109 $ 35,564 $ 4,475 $ 1,560 $ 595,645 Impact of ASU 2022-02 adoption 5,683 337 6 — 1 1 — 6,028 Allowance for loan losses, beginning of period 377,383 150,201 23,379 9,109 35,565 4,476 1,560 601,673 Provision for (reversal of) credit losses on loans (a) 45,319 27,007 10,454 11,537 19,384 (424) 294 113,571 Gross charge-offs (36,573) (7,048) (3) (10,413) — (138) (197) (54,372) Gross recoveries 6,803 432 545 236 69 33 — 8,118 Total net (charge-offs) recoveries (29,770) (6,616) 542 (10,177) 69 (105) (197) (46,254) Foreign currency translation adjustment (247) — — — — — — (247) Allowance for loan losses, end of period $ 392,685 $ 170,592 $ 34,375 $ 10,469 $ 55,018 $ 3,947 $ 1,657 $ 668,743 Year Ended December 31, 2022 Commercial Consumer CRE Residential Mortgage ($ in thousands) C&I CRE Multifamily Residential Construction and Land Single-Family Residential HELOCs Other Consumer Total Allowance for loan losses, beginning of period $ 338,252 $ 150,940 $ 14,400 $ 15,468 $ 17,160 $ 3,435 $ 1,924 $ 541,579 Provision for (reversal of) credit losses on loans (a) 37,604 8,212 15,651 (6,433) 18,867 1,124 (258) 74,767 Gross charge-offs (18,738) (10,871) (7237) — (775) (193) (106) (37,920) Gross recoveries 16,824 1,583 559 74 312 109 — 19,461 Total net (charge-offs) recoveries (1,914) (9,288) (6,678) 74 (463) (84) (106) (18,459) Foreign currency translation adjustment (2,242) — — — — — — (2,242) Allowance for loan losses, end of period $ 371,700 $ 149,864 $ 23,373 $ 9,109 $ 35,564 $ 4,475 $ 1,560 $ 595,645 Year Ended December 31, ($ in thousands) 2024 2023 2022 Unfunded credit facilities Allowance for unfunded credit commitments, beginning of period $ 37,699 $ 26,264 $ 27,514 Provision for (reversal of) credit losses on unfunded credit commitments (b) 1,824 11,429 (1,267) Foreign currency translation adjustments 3 6 17 Allowance for unfunded credit commitments, end of period 39,526 37,699 26,264 Provision for credit losses (a) + (b) $ 174,000 $ 125,000 $ 73,500
Schedule of Carrying Value of Loans Transferred, Loans Sold and Purchased for the Held-for-Investment Portfolio	The following tables provide information on the carrying value of loans transferred, sold and purchased for the held-for-investment portfolio, during the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, 2024 Commercial Consumer CRE Residential Mortgage ($ in thousands) C&I CRE Construction and Land Single-Family Residential Total Loans transferred from held-for-investment to held-for-sale (1) $ 649,187 $ 9,417 $ 718 $ — $ 659,322 Sales (2)(3) $ 650,256 $ 9,417 $ 718 $ 2,997 $ 663,388 Purchases (4) $ 612,364 $ — $ — $ 387,629 $ 999,993 Year Ended December 31, 2023 Commercial Consumer CRE Residential Mortgage ($ in thousands) C&I CRE Construction and Land Single-Family Residential Total Loans transferred from held-for-investment to held-for-sale (1) $ 647,943 $ 83,282 $ 8,154 $ — $ 739,379 Sales (2)(3) $ 674,919 $ 86,749 $ 8,154 $ — $ 769,822 Purchases (4) $ 106,493 $ — $ — $ 493,282 $ 599,775 Year Ended December 31, 2022 Commercial Consumer CRE Residential Mortgage ($ in thousands) C&I CRE Construction and Land Single-Family Residential Total Loans transferred from held-for-investment to held-for-sale (1) $ 530,524 $ 88,075 $ — $ 5,178 $ 623,777 Loans transferred from held-for-sale to held-for-investment $ — $ — $ — $ 631 $ 631 Sales (2)(3) $ 501,289 $ 88,075 $ — $ 6,403 $ 595,767 Purchases (4) $ 363,549 $ — $ — $ 293,721 $ 657,270 (1) Includes write-downs of $2 million, $5 million and $3 million to the allowance for loan losses related to loans transferred from held-for-investment to held-for-sale for the years ended December 31, 2024, 2023 and 2022, respectively. (2) Includes originated loans sold of $508 million, $513 million and $388 million for the years ended December 31, 2024, 2023 and 2022, respectively. Originated loans sold consisted primarily of C&I loans for the year ended December 31, 2024 and C&I and CRE loans for the years ended December 31, 2023 and 2022. (3) Includes $156 million, $256 million and $208 million of purchased loans sold in the secondary market for the years ended December 31, 2024, 2023 and 2022, respectively. (4) C&I loan purchases were comprised of syndicated C&I term loans.

Affordable Housing Partnershi_2

Affordable Housing Partnership, Tax Credit and Community Reinvestment Act Investments, Net (Tables)	12 Months Ended
	Dec. 31, 2024
Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities [Abstract]
Schedule of Affordable Housing, Tax Credit and CRA Investments, Net and Related Unfunded Commitments	The following table presents the investments and unfunded commitments of the Company’s affordable housing partnership, tax credit, and CRA investments, net as of December 31, 2024 and 2023: December 31, 2024 2023 ($ in thousands) Assets Liabilities - Unfunded Commitments (1) Assets Liabilities - Unfunded Commitments (1) PAM: Affordable housing partnership investments $ 500,217 $ 280,919 $ 419,785 $ 251,746 Tax credit and CRA investments 160,429 21,202 — — Equity method of accounting and other: Tax credits and CRA investments 265,994 105,743 485,251 298,990 Total $ 926,640 $ 407,864 $ 905,036 $ 550,736 (1) Included in Accrued expenses and other liabilities on the Consolidated Balance Sheet.
Schedule of Additional Information related to the Affordable Housing, Tax Credit and CRA Investments, Net	The following table presents additional information related to the investments in affordable housing partnership, tax credit and CRA investments for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Tax credits and benefits (1) : PAM: Affordable housing partnership investments $ 70,335 $ 60,939 $ 52,132 Tax credit and CRA investments 110,260 — — Equity method of accounting and other: Tax credit and CRA investments 64,720 124,433 116,132 Total tax credits and benefits $ 245,315 $ 185,372 $ 168,264 Amortization: PAM: Affordable housing partnership investments (2) $ 46,113 $ 43,041 $ 38,759 Tax credit and CRA investments (3) 90,113 — — Equity method of accounting and other: Tax credit and CRA investments (4) (5) 54,242 120,299 113,358 Total amortization $ 190,468 $ 163,340 $ 152,117 (1) Included in Income tax expense on the Consolidated Statement of Income for the years ended December 31, 2024, 2023 and 2022. (2) Amortization related to investments in qualified affordable housing partnerships under PAM was recorded in Income tax expense on the Consolidated Statement of Income for the years ended December 31, 2024, 2023 and 2022. (3) Due to the adoption of ASU 2023-02 on January 1, 2024, amortization related to qualifying tax credit investments under PAM was recorded in Income tax expense on the Consolidated Statement of Income for the year ended December 31, 2024. (4) Amortization related to tax credit and CRA investments was recognized in Amortization of tax credit and CRA investments as part of noninterest expense on the Consolidated Statement Income for the years ended December 31, 2024, 2023 and 2022. (5) Includes impairment of $1 million for the year ended December 31, 2024, and net impairment recoveries of $1 million and $469 thousand for the years ended December 31, 2023 and 2022, respectively. The activity was primarily related to historic and/or energy tax credits.
Schedule of Unfunded Commitments Related to Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Estimated to be Funded	As of December 31, 2024, the Company’s unfunded commitments related to investments in affordable housing partnership, tax credit and CRA investments, net are estimated to be funded as follows: ($ in thousands) Amount 2025 $ 304,008 2026 85,995 2027 9,434 2028 1,643 2029 1,306 Thereafter 5,478 Total $ 407,864

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2024
DEPOSIT ACCOUNTS
Schedule of Deposit Liabilities, Type	The following table presents the composition of the Company’s deposits as of December 31, 2024 and 2023: December 31, ($ in thousands) 2024 2023 Deposits: Noninterest-bearing demand $ 15,450,428 $ 15,539,872 Interest-bearing checking 7,940,692 7,558,908 Money market 14,816,511 13,108,727 Savings: Domestic office 1,583,657 1,638,916 Foreign office 167,963 202,551 Time deposits (1) : Domestic office 21,128,657 16,037,287 Foreign office 2,087,115 2,006,177 Total deposits $ 63,175,023 $ 56,092,438 (1) The aggregate amount of time deposits that met or exceeded the deposit insurance limit was $16.5 billion and $13.6 billion as of December 31, 2024 and 2023, respectively.
Schedule of Time Deposit Maturities	The following table presents the scheduled maturities of time deposits for the five years succeeding December 31, 2024: ($ in thousands) Amount 2025 $ 22,590,146 2026 270,237 2027 299,214 2028 53,109 2029 3,066 Total $ 23,215,772

Short-Term Borrowings and Lon_2

Short-Term Borrowings and Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Schedule of Debt	The following table presents details of the Company’s BTFP borrowings, FHLB advances, and long-term debt as of December 31, 2024 and 2023: December 31, 2024 2023 ($ in thousands) Interest Rate Maturity Dates Amount Amount Parent company Junior subordinated debt (1) — floating 6.17% 12/15/2035 $ 32,001 $ 148,249 Bank BTFP borrowings 4.37% 3/19/2024 $ — $ 4,500,000 FHLB advances (2) : Floating (3) 4.56% — 4.61% 2025 $ 3,000,000 $ — Fixed 3.87% — 3.95% 2026 500,000 — Total FHLB advances $ 3,500,000 $ — (1) As of December 31, 2024, the remaining junior subordinated debt outstanding was issued by MCBI Statutory Trust I that had a stated interest rate of 3-month CME Term Secured Overnight Financing Rate ("SOFR") + 1.81%. The weighted-average contractual interest rates for junior subordinated debt were 6.17% and 6.87% as of December 31, 2024 and 2023, respectively. (2) The weighted-average interest rate for FHLB advances was 4.48% as of December 31, 2024. (3) Floating interest rates are based on the SOFR plus the established spread.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense/Benefit	The following table presents the components of income tax expense (benefit) for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Current income tax expense: Federal $ 166,268 $ 172,428 $ 163,797 State 153,891 173,080 160,629 Foreign 10,399 2,240 3,133 Total current income tax expense 330,558 347,748 327,559 Deferred income tax (benefit) expense: Federal (6,467) (24,319) (23,484) State (5,582) (23,415) (21,835) Foreign (2,234) (1,405) 1,331 Total deferred income tax benefit (14,283) (49,139) (43,988) Income tax expense $ 316,275 $ 298,609 $ 283,571
Schedule of Reconciliation of the Federal Statutory Rate to the Effective Tax Rate	The following table presents the reconciliation of the federal statutory rate to the Company’s effective tax rate for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, 2024 2023 2022 Statutory U.S. federal tax rate 21.0 % 21.0 % 21.0 % U.S. state income taxes, net of U.S. federal income tax effect 7.7 8.1 7.8 Tax credits and benefits, net of amortization (7.4) (9.9) (8.9) Other, net — 1.3 0.2 Effective tax rate 21.3 % 20.5 % 20.1 %
Schedule of Temporary Differences that Give Rise to a Significant Portion of Deferred Tax Assets and Liabilities	The following table summarizes the tax effects of temporary differences that give rise to a significant portion of deferred tax assets and liabilities as of December 31, 2024 and 2023: December 31, ($ in thousands) 2024 2023 Deferred tax assets: Allowance for credit losses and nonperforming assets valuation allowance $ 233,879 $ 217,731 Net unrealized losses on AFS debt and transferred securities 223,814 246,835 Stock compensation and other accrued compensation 41,118 33,169 Lease liabilities 27,644 32,636 FDIC special assessment charge 16,843 22,212 Basis difference in investments 17,708 28,216 State capital loss and tax credit carryforwards 11,122 266 Nonaccrual loans’ interest income 8,809 7,034 State taxes 5,808 9,885 Other 14,665 10,535 Total deferred tax assets $ 601,410 $ 608,519 Deferred tax liabilities: Operating lease right-of-use assets $ 25,647 $ 30,272 Basis difference in investments 25,587 23,103 Equipment lease financing 10,395 15,564 Prepaid expenses 2,319 2,981 FHLB stock dividends 1,961 1,947 Mortgage servicing assets 1,678 2,102 Other 20,479 13,801 Total deferred tax liabilities $ 88,066 $ 89,770 Net deferred tax assets $ 513,344 $ 518,749
Schedule of Reconciliation of the Beginning and Ending Amounts of Unrecognized Tax Benefits	The following table presents a reconciliation of the beginning and ending balances of unrecognized tax benefits for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Beginning balance $ 1,193 $ 477 $ 5,045 Additions for tax positions related to prior years 2,698 (1) 459 — Additions for tax positions related to current year 779 257 — Settlements with taxing authorities — — (4,568) (2) Ending balance $ 4,670 $ 1,193 $ 477 (1) In 2024, the increase in positions related to prior years primarily related to proposed adjustments resulting from examination of the Company’s state tax returns. (2) In 2022, the Company settled an issue regarding previously claimed tax credits related to DC Solar and affiliates.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Schedule of Credit-Related Commitments	The following table presents the Company’s credit-related commitments as of December 31, 2024 and 2023: December 31, 2024 2023 ($ in thousands) Expire in One Year or Less Expire After One Year Through Three Years Expire After Three Years Through Five Years Expire After Five Years Total Total Loan commitments $ 4,741,319 $ 3,640,167 $ 661,403 $ 85,151 $ 9,128,040 $ 9,141,447 Commercial letters of credit and SBLCs 1,152,114 465,073 194,483 1,105,359 2,917,029 2,610,761 Total $ 5,893,433 $ 4,105,240 $ 855,886 $ 1,190,510 $ 12,045,069 $ 11,752,208
Schedule of Guarantees Outstanding	The following table presents the maximum potential future payments and carrying value of loans sold or securitized with recourse as of December 31, 2024 and 2023: Maximum Potential Future Payments Carrying Value (1) December 31, December 31, 2024 2023 2024 2023 ($ in thousands) Expire in One Year or Less Expire After One Year Through Three Years Expire After Three Years Through Five Years Expire After Five Years Total Total Total Total Single-family residential loans sold or securitized with recourse $ 10 $ — $ 40 $ 4,325 $ 4,375 $ 5,888 $ 4,375 $ 5,888 Multifamily residential loans sold or securitized with recourse — — 145 14,851 14,996 14,996 17,770 19,020 Total $ 10 $ — $ 185 $ 19,176 $ 19,371 $ 20,884 $ 22,145 $ 24,908 (1) Represents the unpaid principal balance.

Stock Compensation Plans (Table

Stock Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
Schedule of Stock Compensation Expense and Related Net Tax Benefits	The following table presents a summary of the total share-based compensation expense and the related net tax benefits associated with the Company’s various employee share-based compensation plans for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, ($ in thousands) 2024 2023 2022 Stock compensation costs $ 45,535 $ 39,867 $ 37,601 Related net tax benefits for stock compensation plans $ 997 $ 8,959 $ 5,293
Summary of Activities for Time-Based and Performance-Based Restricted Stock Units	The following table presents a summary of the activities for the Company’s time-based and performance-based RSUs that were settled in shares for the year ended December 31, 2024. The number of performance-based RSUs stated below reflects the number of awards granted on the grant date: Time-Based RSUs Performance-Based RSUs Shares Weighted-Average Grant Date Fair Value Shares Weighted-Average Grant Date Fair Value Outstanding, January 1, 2024 1,206,518 $ 74.29 276,223 $ 78.59 Granted 553,398 $ 76.44 97,798 $ 80.28 Vested (329,468) $ 72.05 (91,960) $ 77.67 Forfeited (81,836) $ 74.53 — $ — Outstanding, December 31, 2024 1,348,612 $ 75.70 282,061 $ 79.48

Stockholders' Equity and Earn_2

Stockholders' Equity and Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2024
Stockholders' Equity and Earnings Per Share [Abstract]
Schedule of Earnings Per Share Calculations	The following table presents the basic and diluted EPS calculations for the years ended December 31, 2024, 2023 and 2022. For more information on the calculation of EPS, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Earnings Per Share to the Consolidated Financial Statements in this Form 10-K. Year Ended December 31, ($ and shares in thousands, except per share data) 2024 2023 2022 Basic: Net income $ 1,165,586 $ 1,161,161 $ 1,128,083 Weighted-average number of shares outstanding 138,898 141,164 141,326 Basic EPS $ 8.39 $ 8.23 $ 7.98 Diluted: Net income $ 1,165,586 $ 1,161,161 $ 1,128,083 Weighted-average number of shares outstanding 138,898 141,164 141,326 Add: Diluted impact of unvested RSUs 1,060 738 1,166 Diluted weighted-average number of shares outstanding 139,958 141,902 142,492 Diluted EPS $ 8.33 $ 8.18 $ 7.92
Schedule of Common Share Repurchase Program	The following table presents the activity under the Company’s common share repurchase program for the periods indicated: Year Ended December 31, ($ in thousands, except shares and per share data) Shares Repurchased Average Price per Share Total Cost 2024 1,943,346 $ 74.33 $ 144,446 2023 1,506,091 $ 54.56 $ 82,174 2022 1,385,517 $ 72.17 $ 99,990

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive (Loss) Income (Tables)	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
Schedule of the Changes in the Components of Accumulated Other Comprehensive (Loss) Income Balances	The following table presents the changes in the components of AOCI balances for the years ended December 31, 2024, 2023 and 2022: ($ in thousands) Debt Securities (1) Cash Flow Hedges Foreign Currency Translation Adjustments (2) Total Balance, December 31, 2021 $ (85,703) $ 257 $ (4,935) $ (90,381) Net unrealized losses arising during the period (620,870) (52,623) (16,348) (689,841) Amounts reclassified from AOCI 11,758 2,835 — 14,593 Changes, net of tax (609,112) (49,788) (16,348) (675,248) Balance, December 31, 2022 $ (694,815) $ (49,531) $ (21,283) $ (765,629) Net unrealized gains (losses) arising during the period 76,930 (4,277) (56) 72,597 Amounts reclassified from AOCI 16,004 56,432 — 72,436 Changes, net of tax 92,934 52,155 (56) 145,033 Balance, December 31, 2023 $ (601,881) $ 2,624 $ (21,339) $ (620,596) Net unrealized gains (losses) arising during the period 50,302 (87,447) (982) (38,127) Amounts reclassified from AOCI 9,427 64,036 — 73,463 Changes, net of tax 59,729 (23,411) (982) 35,336 Balance, December 31, 2024 $ (542,152) $ (20,787) $ (22,321) $ (585,260) (1) Includes after-tax unamortized losses related to AFS debt securities that were transferred to HTM in 2022. (2) Represents foreign currency translation adjustments related to the Company’s net investment in non-U.S. operations, including related hedges. The functional currency and reporting currency of the Company’s foreign subsidiary was RMB and USD, respectively.
Schedule of Components of Other Comprehensive (Loss) Income, Reclassifications to Net income and the Related Tax Effects	The following table presents the components of other comprehensive (loss) income, reclassifications to net income and the related tax effects for the years ended December 31, 2024, 2023 and 2022: Year Ended December 31, 2024 2023 2022 ($ in thousands) Before-Tax Tax Effect Net-of-Tax Before-Tax Tax Effect Net-of-Tax Before-Tax Tax Effect Net-of-Tax Debt securities: Net unrealized gains (losses) on AFS debt securities arising during the period $ 71,259 $ (20,957) $ 50,302 $ 109,216 $ (32,286) $ 76,930 $ (721,100) $ 213,221 $ (507,879) Unrealized losses on debt securities transferred from AFS to HTM — — — — — — (160,416) 47,425 (112,991) Reclassification adjustments: Net realized (gains) losses on AFS debt securities reclassified into net income (1) (2,069) 612 (1,457) 6,862 (2) (2,029) 4,833 (1,306) 386 (920) Amortization of unrealized losses on transferred securities (3) 15,452 (4,568) 10,884 15,860 (4,689) 11,171 18,000 (5,322) 12,678 Net change 84,642 (24,913) 59,729 131,938 (39,004) 92,934 (864,822) 255,710 (609,112) Cash flow hedges: Net unrealized losses arising during the period (124,382) 36,935 (87,447) (5,767) 1,490 (4,277) (74,069) 21,446 (52,623) Net realized losses reclassified into net income (4) 91,083 (27,047) 64,036 79,843 (23,411) 56,432 4,004 (1,169) 2,835 Net change (33,299) 9,888 (23,411) 74,076 (21,921) 52,155 (70,065) 20,277 (49,788) Foreign currency translation adjustments, net of hedges: Net unrealized (losses) gains arising during the period (809) (173) (982) 698 (754) (56) (15,059) (1,289) (16,348) Net change (809) (173) (982) 698 (754) (56) (15,059) (1,289) (16,348) Other comprehensive income (loss) $ 50,534 $ (15,198) $ 35,336 $ 206,712 $ (61,679) $ 145,033 $ (949,946) $ 274,698 $ (675,248) (1) Pre-tax amounts were reported in Net gains (losses) on AFS debt securities on the Consolidated Statement of Income. (2) Represents the net loss related to an AFS debt security that was written-off in the first quarter of 2023 and subsequently sold during the fourth quarter of 2023. (3) Represents unrealized losses amortized over the remaining lives of securities that were transferred from the AFS to HTM portfolio in 2022. (4) Pre-tax amounts related to cash flow hedges on variable rate loans and long-term borrowings, where applicable, were reported in Interest and dividend income and in Interest expense, respectively , on the Consolidated Statement of Income. In 2023, pre-tax amount also includes the terminated cash flow hedge where the forecasted cash flows were no longer probable to occur and was reported in Noninterest income on the Consolidated Statement of Income.

Regulatory Requirements and M_2

Regulatory Requirements and Matters (Tables)	12 Months Ended
	Dec. 31, 2024
Banking and Thrift, Interest [Abstract]
Schedule of Regulatory Capital Information	The following table presents the regulatory capital information of the Company and the Bank as of December 31, 2024 and 2023: Basel III December 31, 2024 (1) December 31, 2023 (1) ($ in thousands) Amount Ratio Amount Ratio Minimum Regulatory Requirements Minimum Regulatory Requirements including Capital Conservation Buffer (3) Well-Capitalized Requirement Total capital (to risk-weighted assets) Company $ 8,561,797 15.6 % $ 7,919,407 14.8 % 8.0 % 10.5 % 10.0 % East West Bank $ 8,053,389 14.7 % $ 7,363,575 13.8 % 8.0 % 10.5 % 10.0 % Tier 1 capital (to risk-weighted assets) Company $ 7,839,816 14.3 % $ 7,140,778 13.3 % 6.0 % 8.5 % 6.0 % East West Bank $ 7,367,996 13.4 % $ 6,732,946 12.6 % 6.0 % 8.5 % 8.0 % CET1 capital (to risk-weighted assets) Company (2) $ 7,839,816 14.3 % $ 7,140,778 13.3 % 4.5 % 7.0 % N/A East West Bank $ 7,367,996 13.4 % $ 6,732,946 12.6 % 4.5 % 7.0 % 6.5 % Tier 1 leverage capital (to adjusted quarterly average assets) Company (2) $ 7,839,816 10.4 % $ 7,140,778 10.2 % 4.0 % 4.0 % N/A East West Bank $ 7,367,996 9.8 % $ 6,732,946 9.6 % 4.0 % 4.0 % 5.0 % N/A — Not applicable. (1) Reflected a delay of the estimated impact of CECL on regulatory capital in accordance with regulatory capital rules. (2) The well-capitalized requirements for CET1 capital and Tier 1 leverage capital apply only to the Bank since there is no CET1 capital ratio or Tier 1 leverage capital ratio component in the definition of a well-capitalized bank holding company. (3) Includes a 2.5% capital conservation buffer requirement above the minimum risk-based capital ratios.

Business Segments (Tables)

Business Segments (Tables)	12 Months Ended
	Dec. 31, 2024
Segment Reporting [Abstract]
Schedule of Operating Results and Key Financial Measures by Operating Segments	The following tables present the operating results and other key financial measures for the individual operating segments as of and for the years ended December 31, 2024, 2023 and 2022: ($ in thousands) Consumer and Business Banking Commercial Banking Treasury and Other Total Year Ended December 31, 2024 Net interest income before provision for credit losses $ 1,152,033 $ 1,125,931 $ 752 $ 2,278,716 Noninterest income 108,773 197,780 28,665 335,218 Total revenue before provision for credit losses 1,260,806 1,323,711 29,417 2,613,934 Provision for (reversal of) credit losses 8,691 166,953 (1,644) 174,000 Compensation and employee benefits 217,612 234,240 98,882 550,734 Other noninterest expense (1) 234,494 161,969 10,876 407,339 Total noninterest expense 452,106 396,209 109,758 958,073 Segment income (loss) before income taxes 800,009 760,549 (78,697) 1,481,861 Segment net income $ 563,218 $ 535,652 $ 66,716 $ 1,165,586 Average balances: Loans $ 18,966,662 $ 32,996,221 $ 405,897 $ 52,368,780 Deposits $ 30,815,912 $ 25,820,956 $ 3,036,171 $ 59,673,039 As of December 31, 2024 Segment assets $ 20,084,814 $ 35,646,939 $ 20,244,722 $ 75,976,475 ($ in thousands) Consumer and Business Banking Commercial Banking Treasury and Other Total Year Ended December 31, 2023 Net interest income (loss) before provision for credit losses $ 1,225,954 $ 1,116,013 $ (29,713) $ 2,312,254 Noninterest income 103,890 168,502 22,872 295,264 Total revenue (loss) before provision for credit losses 1,329,844 1,284,515 (6,841) 2,607,518 Provision for credit losses 21,454 100,391 3,155 125,000 Compensation and employee benefits 203,387 217,663 87,488 508,538 Other noninterest expense (1) 262,086 158,949 93,175 514,210 Total noninterest expense 465,473 376,612 180,663 1,022,748 Segment income (loss) before income taxes 842,917 807,512 (190,659) 1,459,770 Segment net income (loss) $ 594,965 $ 570,153 $ (3,957) $ 1,161,161 Average balances: Loans $ 17,739,984 $ 31,365,547 $ 439,605 $ 49,545,136 Deposits $ 28,174,781 $ 23,304,066 $ 3,483,884 $ 54,962,731 As of December 31, 2023 Segment assets $ 19,165,172 $ 35,020,106 $ 15,427,606 $ 69,612,884 ($ in thousands) Consumer and Business Banking Commercial Banking Treasury and Other Total Year Ended December 31, 2022 Net interest income (loss) before provision for credit losses $ 1,061,238 $ 988,158 $ (3,515) $ 2,045,881 Noninterest income 113,722 174,365 10,579 298,666 Total revenue before provision for credit losses 1,174,960 1,162,523 7,064 2,344,547 Provision for (reversal of) credit losses 25,983 48,248 (731) 73,500 Compensation and employee benefits 195,394 211,355 70,886 477,635 Other noninterest expense (1) 196,581 102,018 83,159 381,758 Total noninterest expense 391,975 313,373 154,045 859,393 Segment income (loss) before income taxes 757,002 800,902 (146,250) 1,411,654 Segment net income $ 537,754 $ 569,982 $ 20,347 $ 1,128,083 Average balances: Loans $ 15,534,259 $ 29,321,701 $ 463,498 $ 45,319,458 Deposits $ 27,276,151 $ 23,252,073 $ 3,771,355 $ 54,299,579 As of December 31, 2022 Segment assets $ 17,183,425 $ 32,770,772 $ 14,157,953 $ 64,112,150 (1) The Treasury and Other segment's other noninterest expense is primarily comprised of amortization of tax credit and CRA investments, and other operating expenses. The Consumer and Business Banking segment's other noninterest expense is primarily comprised of corporate overhead allocated expenses, occupancy and equipment expense, other operating expenses, and deposit insurance premiums and regulatory assessments. The Commercial Banking segment’s other noninterest expense is primarily comprised of corporate overhead allocated expenses, deposit account expense, occupancy and equipment expense, and deposit insurance premiums and regulatory assessments.

Parent Company Condensed Fina_2

Parent Company Condensed Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2024
Condensed Financial Information Disclosure [Abstract]
Schedule of Condensed Balance Sheet	The following tables present the Parent Company-only condensed financial statements: CONDENSED BALANCE SHEET December 31, ($ in thousands) 2024 2023 ASSETS Cash and cash equivalents due from banks $ 394,919 $ 445,770 Investments in subsidiaries: Bank 7,251,084 6,542,852 Nonbank 10,423 13,502 Other assets 125,552 120,742 TOTAL $ 7,781,978 $ 7,122,866 LIABILITIES AND STOCKHOLDERS’ EQUITY Long-term debt $ 32,001 $ 148,249 Other liabilities 26,923 23,783 Stockholders’ equity 7,723,054 6,950,834 TOTAL $ 7,781,978 $ 7,122,866
Schedule of Condensed Statement of Income	CONDENSED STATEMENT OF INCOME Year Ended December 31, ($ in thousands) 2024 2023 2022 Dividends from subsidiaries: Bank $ 540,000 $ 704,000 $ 240,000 Nonbank 127 322 157 Other investment losses (954) (2,738) — Other income 31 — — Total income 539,204 701,584 240,157 Interest expense on long-term debt 4,507 10,889 5,450 Compensation and employee benefits 7,283 7,204 6,708 Other expense (income) (1) 1,839 (1,086) 1,254 Total expense 13,629 17,007 13,412 Income before income tax benefit and equity in undistributed income of subsidiaries 525,575 684,577 226,745 Income tax benefit 4,143 5,844 4,269 Undistributed earnings of subsidiaries, primarily bank 635,868 470,740 897,069 Net income $ 1,165,586 $ 1,161,161 $ 1,128,083 (1)
Schedule of Condensed Statement of Cash Flows	CONDENSED STATEMENT OF CASH FLOWS Year Ended December 31, ($ in thousands) 2024 2023 2022 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 1,165,586 $ 1,161,161 $ 1,128,083 Adjustments to reconcile net income to net cash provided by operating activities: Undistributed earnings of subsidiaries, principally bank (635,868) (470,740) (897,069) Deferred income tax expense (benefit) 2,788 948 (2,193) Net change in other assets (6,912) (4,160) 4,250 Net change in other liabilities (802) (47) 779 Other operating activities, net 1,265 2,443 1,333 Net cash provided by operating activities 526,057 689,605 235,183 CASH FLOWS FROM INVESTING ACTIVITIES Redemption of trust preferred securities 3,558 — — Other investing activities, net (494) (95,095) (7,390) Net cash provided by (used in) investing activities 3,064 (95,095) (7,390) CASH FLOWS FROM FINANCING ACTIVITIES Long-term debt: Repayment of junior subordinated debt (116,558) — — Common stock: Proceeds from issuance pursuant to various stock compensation plans and agreements 3,023 3,208 3,178 Stock tendered for payment of withholding taxes (14,877) (23,751) (19,087) Repurchase of common stock pursuant to the stock repurchase program (143,082) (82,174) (99,990) Cash dividends paid (308,478) (274,554) (228,381) Net cash used in financing activities (579,972) (377,271) (344,280) Net (decrease) increase in cash and cash equivalents (50,851) 217,239 (116,487) Cash and cash equivalents, beginning of year 445,770 228,531 345,018 Cash and cash equivalents, end of year $ 394,919 $ 445,770 $ 228,531

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Nature of Operations and Principles of Consolidation (Details)	12 Months Ended
	Dec. 31, 2024 trust location	Dec. 31, 2023	Dec. 31, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of banking locations (over) | location	110
Principles of Consolidation
Number of wholly owned subsidiaries that are statutory business trusts | trust	1
Revenue Benchmark | Customer Concentration Risk | Service Charges, Deposit Account Fees, Card Income and Wealth Managment Fees
Disaggregation of Revenue [Abstract]
Revenue streams, Percent of total non-interest income	43%	41%	41%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Schedule of Premises and Equipment, net (Details)	Dec. 31, 2024
Buildings
Premises and equipment
Estimated useful life	25 years
Furniture, fixtures and equipment
Premises and equipment
Estimated useful life	7 years

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Goodwill (Details)	12 Months Ended
	Dec. 31, 2024 segment
Accounting Policies [Abstract]
Number of reportable segments	3

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Accounting Pronouncements Adopted (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
New Accounting Pronouncements Adopted and Recent Accounting Pronouncements [Line Items]
Retained earnings	$ 7,311,542	$ 6,465,230
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2023-02
New Accounting Pronouncements Adopted and Recent Accounting Pronouncements [Line Items]
Retained earnings		$ (9,000)

Fair Value Measurement and Fa_3

Fair Value Measurement and Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Dec. 31, 2024	Apr. 08, 2024
Rayliant Global Advisors Limited
Investments in Tax Credit and Other Investments, Net
Equity method investment, ownership (percent)	49.99%
Number of shares (in shares)	349,138
Payments to acquire equity method investments	$ 95,000
Rayliant Global Advisors Limited | Performance Based Restricted Stock Units | Minimum
Investments in Tax Credit and Other Investments, Net
Percentage of target award available for grant	20%
Rayliant Global Advisors Limited | Performance Based Restricted Stock Units | Maximum
Investments in Tax Credit and Other Investments, Net
Percentage of target award available for grant	200%
Fair Value, Measurements, Recurring
Investments in Tax Credit and Other Investments, Net
Equity securities		$ 568
Fair Value, Measurements, Recurring | Level 1
Investments in Tax Credit and Other Investments, Net
Equity securities		568
Visa C | Fair Value, Measurements, Recurring | Level 1
Investments in Tax Credit and Other Investments, Net
Equity securities		$ 568
Common Stock | Visa B-1
Investments in Tax Credit and Other Investments, Net
Common stock, shares held (in shares)			2,266
Common Stock | Visa B-2
Investments in Tax Credit and Other Investments, Net
Common stock, shares held (in shares)			1,133
Common Stock | Visa C
Investments in Tax Credit and Other Investments, Net
Common stock, shares held (in shares)			449

Fair Value Measurement and Fa_4

Fair Value Measurement and Fair Value of Financial Instruments - Schedule Of Financial Assets (Liabilities) Measured At Fair Value On a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Affordable housing partnership, tax credit and CRA investments, net:
Total affordable housing partnership, tax credit and CRA investments, net	$ 926,640	$ 905,036
Derivative assets:
Derivative assets - Fair value	523,133	610,920
Net derivative assets	95,841	298,128
Derivative liabilities - Fair value	545,885	613,314
Net derivative liabilities	433,601	537,144
Fair Value	10,846,811	6,188,337
Government National Mortgage Association (GNMA)
Derivative assets:
Fair Value	7,200,000	1,200,000
U.S. Treasury securities
Derivative assets:
Fair Value	638,265	1,060,375
U.S. government agency and U.S. government sponsored enterprise debt securities
Derivative assets:
Fair Value	262,587	364,446
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Derivative assets:
Fair Value	426,214	468,259
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Derivative assets:
Fair Value	7,738,260	1,727,594
Municipal securities
Derivative assets:
Fair Value	250,153	261,016
Non-agency commercial mortgage-backed securities
Derivative assets:
Fair Value	258,470	367,516
Non-agency residential mortgage-backed Securities
Derivative assets:
Fair Value	433,608	553,671
Corporate debt securities
Derivative assets:
Fair Value	526,166	502,425
Foreign government bonds
Derivative assets:
Fair Value	233,880	227,874
Asset-backed securities
Derivative assets:
Fair Value	34,715	42,300
Collateralized loan obligations (“CLOs”)
Derivative assets:
Fair Value	44,493	612,861
Fair Value, Measurements, Recurring
AFS debt securities:
Fair Value	10,846,811	6,188,337
Affordable housing partnership, tax credit and CRA investments, net:
Equity securities	25,021	24,659
Total affordable housing partnership, tax credit and CRA investments, net	25,021	24,659
Other assets:
Equity securities	568
Total other assets	568
Derivative assets:
Derivative assets - Fair value	523,133	610,920
Netting adjustments	(427,292)	(312,792)
Net derivative assets	95,841	298,128
Derivative liabilities - Fair value	545,885	613,314
Netting adjustments	(112,284)	(76,170)
Net derivative liabilities	433,601	537,144
Fair Value, Measurements, Recurring | Interest rate contracts
Derivative assets:
Derivative assets - Fair value	385,311	473,907
Derivative liabilities - Fair value	414,172	433,936
Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative assets:
Derivative assets - Fair value	89,083	57,072
Derivative liabilities - Fair value	71,254	42,564
Fair Value, Measurements, Recurring | Credit contracts
Derivative assets:
Derivative assets - Fair value	1	1
Derivative liabilities - Fair value	12	25
Fair Value, Measurements, Recurring | Equity contracts
Derivative assets:
Derivative assets - Fair value	239	336
Derivative liabilities - Fair value	15,119	15,119
Fair Value, Measurements, Recurring | Commodity contracts
Derivative assets:
Derivative assets - Fair value	48,499	79,604
Derivative liabilities - Fair value	45,328	121,670
Fair Value, Measurements, Recurring | U.S. Treasury securities
AFS debt securities:
Fair Value	638,265	1,060,375
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government sponsored enterprise debt securities
AFS debt securities:
Fair Value	262,587	364,446
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
AFS debt securities:
Fair Value	426,214	468,259
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
AFS debt securities:
Fair Value	7,738,260	1,727,594
Fair Value, Measurements, Recurring | Municipal securities
AFS debt securities:
Fair Value	250,153	261,016
Fair Value, Measurements, Recurring | Non-agency commercial mortgage-backed securities
AFS debt securities:
Fair Value	258,470	367,516
Fair Value, Measurements, Recurring | Non-agency residential mortgage-backed Securities
AFS debt securities:
Fair Value	433,608	553,671
Fair Value, Measurements, Recurring | Corporate debt securities
AFS debt securities:
Fair Value	526,166	502,425
Fair Value, Measurements, Recurring | Foreign government bonds
AFS debt securities:
Fair Value	233,880	227,874
Fair Value, Measurements, Recurring | Asset-backed securities
AFS debt securities:
Fair Value	34,715	42,300
Fair Value, Measurements, Recurring | Collateralized loan obligations (“CLOs”)
AFS debt securities:
Fair Value	44,493	612,861
Fair Value, Measurements, Recurring | Level 1
AFS debt securities:
Fair Value	638,265	1,060,375
Affordable housing partnership, tax credit and CRA investments, net:
Equity securities	20,817	20,509
Total affordable housing partnership, tax credit and CRA investments, net	20,817	20,509
Other assets:
Equity securities	568
Total other assets	568
Derivative assets:
Derivative assets - Fair value	0	0
Netting adjustments	0	0
Net derivative assets	0	0
Derivative liabilities - Fair value	0	0
Netting adjustments	0	0
Net derivative liabilities	0	0
Fair Value, Measurements, Recurring | Level 1 | Interest rate contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 1 | Foreign exchange contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 1 | Credit contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 1 | Equity contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 1 | Commodity contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury securities
AFS debt securities:
Fair Value	638,265	1,060,375
Fair Value, Measurements, Recurring | Level 1 | U.S. government agency and U.S. government sponsored enterprise debt securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Municipal securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Non-agency commercial mortgage-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Non-agency residential mortgage-backed Securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Corporate debt securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Foreign government bonds
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Asset-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Collateralized loan obligations (“CLOs”)
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 2
AFS debt securities:
Fair Value	10,208,546	5,127,962
Affordable housing partnership, tax credit and CRA investments, net:
Equity securities	4,204	4,150
Total affordable housing partnership, tax credit and CRA investments, net	4,204	4,150
Other assets:
Equity securities	0
Total other assets	0
Derivative assets:
Derivative assets - Fair value	522,894	610,584
Netting adjustments	(427,292)	(312,792)
Net derivative assets	95,602	297,792
Derivative liabilities - Fair value	530,766	598,195
Netting adjustments	(112,284)	(76,170)
Net derivative liabilities	418,482	522,025
Fair Value, Measurements, Recurring | Level 2 | Interest rate contracts
Derivative assets:
Derivative assets - Fair value	385,311	473,907
Derivative liabilities - Fair value	414,172	433,936
Fair Value, Measurements, Recurring | Level 2 | Foreign exchange contracts
Derivative assets:
Derivative assets - Fair value	89,083	57,072
Derivative liabilities - Fair value	71,254	42,564
Fair Value, Measurements, Recurring | Level 2 | Credit contracts
Derivative assets:
Derivative assets - Fair value	1	1
Derivative liabilities - Fair value	12	25
Fair Value, Measurements, Recurring | Level 2 | Equity contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 2 | Commodity contracts
Derivative assets:
Derivative assets - Fair value	48,499	79,604
Derivative liabilities - Fair value	45,328	121,670
Fair Value, Measurements, Recurring | Level 2 | U.S. Treasury securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 2 | U.S. government agency and U.S. government sponsored enterprise debt securities
AFS debt securities:
Fair Value	262,587	364,446
Fair Value, Measurements, Recurring | Level 2 | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
AFS debt securities:
Fair Value	426,214	468,259
Fair Value, Measurements, Recurring | Level 2 | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
AFS debt securities:
Fair Value	7,738,260	1,727,594
Fair Value, Measurements, Recurring | Level 2 | Municipal securities
AFS debt securities:
Fair Value	250,153	261,016
Fair Value, Measurements, Recurring | Level 2 | Non-agency commercial mortgage-backed securities
AFS debt securities:
Fair Value	258,470	367,516
Fair Value, Measurements, Recurring | Level 2 | Non-agency residential mortgage-backed Securities
AFS debt securities:
Fair Value	433,608	553,671
Fair Value, Measurements, Recurring | Level 2 | Corporate debt securities
AFS debt securities:
Fair Value	526,166	502,425
Fair Value, Measurements, Recurring | Level 2 | Foreign government bonds
AFS debt securities:
Fair Value	233,880	227,874
Fair Value, Measurements, Recurring | Level 2 | Asset-backed securities
AFS debt securities:
Fair Value	34,715	42,300
Fair Value, Measurements, Recurring | Level 2 | Collateralized loan obligations (“CLOs”)
AFS debt securities:
Fair Value	44,493	612,861
Fair Value, Measurements, Recurring | Level 3
AFS debt securities:
Fair Value	0	0
Affordable housing partnership, tax credit and CRA investments, net:
Equity securities	0	0
Total affordable housing partnership, tax credit and CRA investments, net	0	0
Other assets:
Equity securities	0
Total other assets	0
Derivative assets:
Derivative assets - Fair value	239	336
Netting adjustments	0	0
Net derivative assets	239	336
Derivative liabilities - Fair value	15,119	15,119
Netting adjustments	0	0
Net derivative liabilities	15,119	15,119
Fair Value, Measurements, Recurring | Level 3 | Interest rate contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 3 | Foreign exchange contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 3 | Credit contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 3 | Equity contracts
Derivative assets:
Derivative assets - Fair value	239	336
Derivative liabilities - Fair value	15,119	15,119
Fair Value, Measurements, Recurring | Level 3 | Commodity contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. Treasury securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. government agency and U.S. government sponsored enterprise debt securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Municipal securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Non-agency commercial mortgage-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Non-agency residential mortgage-backed Securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Corporate debt securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Foreign government bonds
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Asset-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Collateralized loan obligations (“CLOs”)
AFS debt securities:
Fair Value	$ 0	$ 0

Fair Value Measurement and Fa_5

Fair Value Measurement and Fair Value of Financial Instruments - Schedule Of Reconciliation Of The Beginning And Ending Balances Of Equity Contracts Measured At Fair Value On a Recurring Basis Using Significant Unobservable Inputs (Level 3) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative liabilities:
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Lending fees	Lending fees	Lending fees
Equity contracts | Fair Value, Measurements, Recurring | Level 3
Derivative assets:
Beginning balance	$ 336	$ 323	$ 215
Total (losses) gains included in earnings	(97)	(79)	17
Issuances	0	92	91
Ending balance	239	336	323
Derivative liabilities:
Beginning balance	15,119	0	0
Issuances	0	15,119	0
Ending balance	$ 15,119	$ 15,119	$ 0

Fair Value Measurement and Fa_6

Fair Value Measurement and Fair Value of Financial Instruments - Schedule Of Quantitative Information About Significant Unobservable Inputs Used In The Valuation Of Level 3 Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Derivative assets:
Derivative assets - Fair value	$ 523,133	$ 610,920
Derivative liabilities:
Derivative liabilities - Fair value	545,885	613,314
Fair Value, Measurements, Recurring
Derivative assets:
Derivative assets - Fair value	523,133	610,920
Derivative liabilities:
Derivative liabilities - Fair value	545,885	613,314
Fair Value, Measurements, Nonrecurring
Derivative liabilities:
Loans held-for-investment, fair value disclosure	61,486	45,892
Fair Value, Measurements, Nonrecurring | Affordable housing partnership, tax credit and CRA investments, net
Derivative liabilities:
Affordable housing partnership, tax credit and CRA investments, net		868
Fair Value, Measurements, Nonrecurring | OREO
Derivative liabilities:
Affordable housing partnership, tax credit and CRA investments, net	19,386
Level 3 | Fair Value, Measurements, Recurring
Derivative assets:
Derivative assets - Fair value	239	336
Derivative liabilities:
Derivative liabilities - Fair value	15,119	15,119
Level 3 | Fair Value, Measurements, Nonrecurring
Derivative liabilities:
Loans held-for-investment, fair value disclosure	61,486	45,892
Level 3 | Fair Value, Measurements, Nonrecurring | Affordable housing partnership, tax credit and CRA investments, net
Derivative liabilities:
Affordable housing partnership, tax credit and CRA investments, net	5,000	868
Level 3 | Fair Value, Measurements, Nonrecurring | OREO
Derivative liabilities:
Affordable housing partnership, tax credit and CRA investments, net	19,386
Level 3 | Fair Value, Measurements, Nonrecurring | Fair value of collateral
Derivative liabilities:
Loans held-for-investment, fair value disclosure	910	16,328
Level 3 | Fair Value, Measurements, Nonrecurring | Fair value of collateral
Derivative liabilities:
Loans held-for-investment, fair value disclosure	22,993	3,009
Level 3 | Fair Value, Measurements, Nonrecurring | Fair value of property
Derivative liabilities:
Loans held-for-investment, fair value disclosure	37,583	26,555
Level 3 | Fair Value, Measurements, Nonrecurring | Fair value of property | OREO
Derivative liabilities:
Affordable housing partnership, tax credit and CRA investments, net	19,386
Level 3 | Fair Value, Measurements, Nonrecurring | Individual analysis of each investment | Affordable housing partnership, tax credit and CRA investments, net
Derivative liabilities:
Affordable housing partnership, tax credit and CRA investments, net	$ 5,000	$ 868
Level 3 | Fair Value, Measurements, Nonrecurring | Discount | Fair value of collateral
Derivative liabilities:
Loans held-for-investment, measurement input	50%
Level 3 | Fair Value, Measurements, Nonrecurring | Selling cost | Fair value of property
Derivative liabilities:
Loans held-for-investment, measurement input		8%
OREO, measurement input	0.08
Level 3 | Fair Value, Measurements, Nonrecurring | Minimum | Discount | Fair value of collateral
Derivative liabilities:
Loans held-for-investment, measurement input		15%
Level 3 | Fair Value, Measurements, Nonrecurring | Minimum | Selling cost | Fair value of property
Derivative liabilities:
Loans held-for-investment, measurement input	8%
Level 3 | Fair Value, Measurements, Nonrecurring | Maximum | Discount | Fair value of collateral
Derivative liabilities:
Loans held-for-investment, measurement input		75%
Level 3 | Fair Value, Measurements, Nonrecurring | Maximum | Selling cost | Fair value of property
Derivative liabilities:
Loans held-for-investment, measurement input	20%
Level 3 | Fair Value, Measurements, Nonrecurring | Weighted Average | Discount | Fair value of collateral
Derivative liabilities:
Loans held-for-investment, measurement input	50%	45%
Level 3 | Fair Value, Measurements, Nonrecurring | Weighted Average | Selling cost | Fair value of property
Derivative liabilities:
Loans held-for-investment, measurement input	10%	8%
OREO, measurement input	0.08
Equity contracts | Fair Value, Measurements, Recurring
Derivative assets:
Derivative assets - Fair value	$ 239	$ 336
Derivative liabilities:
Derivative liabilities - Fair value	15,119	15,119
Equity contracts | Level 3 | Fair Value, Measurements, Recurring
Derivative assets:
Derivative assets - Fair value	239	336
Derivative liabilities:
Derivative liabilities - Fair value	$ 15,119	$ 15,119
Equity contracts | Level 3 | Fair Value, Measurements, Recurring | Liquidity discount | Black-Scholes option pricing model
Derivative liabilities:
Measurement input	47%	47%
Equity contracts | Level 3 | Fair Value, Measurements, Recurring | Payout % designated based on operating revenue and operating EBITDA of investee | Internal model
Derivative liabilities:
Measurement input	84%	84%
Equity contracts | Level 3 | Fair Value, Measurements, Recurring | Minimum | Equity volatility | Black-Scholes option pricing model
Derivative liabilities:
Measurement input	38%	37%
Equity contracts | Level 3 | Fair Value, Measurements, Recurring | Maximum | Equity volatility | Black-Scholes option pricing model
Derivative liabilities:
Measurement input	57%	48%
Equity contracts | Level 3 | Fair Value, Measurements, Recurring | Weighted Average | Equity volatility | Black-Scholes option pricing model
Derivative liabilities:
Measurement input	50%	45%
Equity contracts | Level 3 | Fair Value, Measurements, Recurring | Weighted Average | Liquidity discount | Black-Scholes option pricing model
Derivative liabilities:
Measurement input	47%	47%
Equity contracts | Level 3 | Fair Value, Measurements, Recurring | Weighted Average | Payout % designated based on operating revenue and operating EBITDA of investee | Internal model
Derivative liabilities:
Measurement input	84%	84%

Fair Value Measurement and Fa_7

Fair Value Measurement and Fair Value of Financial Instruments - Schedule Of Carrying Amounts Of Assets That Were Still Held And Had Fair Value Adjustments Measured On a Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	$ 61,486	$ 45,892
Affordable housing partnership, tax credit and CRA investments, net
Fair Value, Assets Measured on a Nonrecurring Basis
Affordable housing partnership, tax credit and CRA investments, net		868
OREO
Fair Value, Assets Measured on a Nonrecurring Basis
Affordable housing partnership, tax credit and CRA investments, net	19,386
Commercial Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	61,378	44,688
Commercial Lending | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	48,384	22,035
Commercial Lending | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	1,678	22,653
Commercial Lending | Construction and land
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	11,316
Consumer Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	108	1,204
Consumer Lending | Single-Family Residential
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	108
Consumer Lending | HELOCs
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure		1,204
Level 1
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Level 1 | Affordable housing partnership, tax credit and CRA investments, net
Fair Value, Assets Measured on a Nonrecurring Basis
Affordable housing partnership, tax credit and CRA investments, net	0	0
Level 1 | OREO
Fair Value, Assets Measured on a Nonrecurring Basis
Affordable housing partnership, tax credit and CRA investments, net	0
Level 1 | Commercial Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Level 1 | Commercial Lending | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Level 1 | Commercial Lending | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Level 1 | Commercial Lending | Construction and land
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0
Level 1 | Consumer Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Level 1 | Consumer Lending | Single-Family Residential
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0
Level 1 | Consumer Lending | HELOCs
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure		0
Level 2
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Level 2 | Affordable housing partnership, tax credit and CRA investments, net
Fair Value, Assets Measured on a Nonrecurring Basis
Affordable housing partnership, tax credit and CRA investments, net	0	0
Level 2 | OREO
Fair Value, Assets Measured on a Nonrecurring Basis
Affordable housing partnership, tax credit and CRA investments, net	0
Level 2 | Commercial Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Level 2 | Commercial Lending | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Level 2 | Commercial Lending | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Level 2 | Commercial Lending | Construction and land
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0
Level 2 | Consumer Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Level 2 | Consumer Lending | Single-Family Residential
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0
Level 2 | Consumer Lending | HELOCs
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure		0
Level 3
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	61,486	45,892
Level 3 | Affordable housing partnership, tax credit and CRA investments, net
Fair Value, Assets Measured on a Nonrecurring Basis
Affordable housing partnership, tax credit and CRA investments, net	5,000	868
Level 3 | OREO
Fair Value, Assets Measured on a Nonrecurring Basis
Affordable housing partnership, tax credit and CRA investments, net	19,386
Level 3 | Commercial Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	61,378	44,688
Level 3 | Commercial Lending | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	48,384	22,035
Level 3 | Commercial Lending | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	1,678	22,653
Level 3 | Commercial Lending | Construction and land
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	11,316
Level 3 | Consumer Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	108	1,204
Level 3 | Consumer Lending | Single-Family Residential
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	$ 108
Level 3 | Consumer Lending | HELOCs
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure		$ 1,204

Fair Value Measurement and Fa_8

Fair Value Measurement and Fair Value of Financial Instruments - Schedule Of Increase (Decrease) In Fair Value Of Assets For Which a Fair Value Adjustment Was Recognized, Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase (decrease) in fair value of assets	$ (47,513)	$ (7,375)	$ (32,928)
Loans held-for-investment | Commercial lending
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase (decrease) in fair value of assets	(46,121)	(7,335)	(33,094)
Loans held-for-investment | Commercial lending | C&I
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase (decrease) in fair value of assets	(43,754)	(6,152)	(25,996)
Loans held-for-investment | Commercial lending | Total CRE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase (decrease) in fair value of assets	(2,367)	(1,183)	(7,098)
Loans held-for-investment | Commercial lending | CRE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase (decrease) in fair value of assets	(78)	(1,183)	(7,098)
Loans held-for-investment | Commercial lending | Construction and land
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase (decrease) in fair value of assets	(2,289)	0	0
Loans held-for-investment | Consumer Lending
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase (decrease) in fair value of assets	(1,392)	(40)	166
Loans held-for-investment | Consumer Lending | Total residential mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase (decrease) in fair value of assets	(1,392)	(40)	166
Loans held-for-investment | Consumer Lending | Single-Family Residential
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase (decrease) in fair value of assets	(1,392)	0	0
Loans held-for-investment | Consumer Lending | HELOCs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase (decrease) in fair value of assets	0	(40)	166
Affordable housing partnership, tax credit and CRA investments, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase (decrease) in fair value of assets	(685)	(1,140)	469
OREO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase (decrease) in fair value of assets	(7,735)	0	0
Other nonperforming assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase (decrease) in fair value of assets	$ 0	$ 0	$ (6,861)

Fair Value Measurement and Fa_9

Fair Value Measurement and Fair Value of Financial Instruments - Schedule Of The Carrying And Fair Value Estimates Per The Fair Value Hierarchy Of Financial Instruments Measured On a Nonrecurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financial assets:
Cash and cash equivalents	$ 5,250,742	$ 4,614,984
Interest-bearing deposits with banks	48,198	10,498
Resale agreements	425,000	785,000
HTM debt securities	2,917,413	2,956,040
Restricted equity securities, at cost	165,259	79,811
Loans held-for-investment, net	53,024,585	51,542,039
Financial liabilities:
Time deposits	23,215,772
FHLB advances	3,500,000	0
Carrying Amount
Financial assets:
Cash and cash equivalents	5,250,742	4,614,984
Interest-bearing deposits with banks	48,198	10,498
Resale agreements	425,000	785,000
HTM debt securities	2,917,413	2,956,040
Restricted equity securities, at cost	165,259	79,811
Loans held-for-sale		116
Loans held-for-investment, net	53,024,585	51,542,039
Mortgage servicing rights	5,234	6,602
Accrued interest receivable	316,392	331,490
Financial liabilities:
Demand, checking, savings and money market deposits	39,959,251	38,048,974
Time deposits	23,215,772	18,043,464
FHLB advances	3,500,000
BTFP borrowings		4,500,000
Long-term debt	32,001	148,249
Accrued interest payable	61,950	205,430
Estimated Fair Value
Financial assets:
Cash and cash equivalents	5,250,742	4,614,984
Interest-bearing deposits with banks	48,198	10,498
Resale agreements	329,769	699,056
HTM debt securities	2,387,754	2,453,971
Restricted equity securities, at cost	165,259	79,811
Loans held-for-sale		116
Loans held-for-investment, net	51,328,254	50,256,565
Mortgage servicing rights	8,822	9,470
Accrued interest receivable	316,392	331,490
Financial liabilities:
Demand, checking, savings and money market deposits	39,959,251	38,048,974
Time deposits	23,225,317	18,004,951
FHLB advances	3,497,953
BTFP borrowings		4,500,000
Long-term debt	31,246	150,896
Accrued interest payable	61,950	205,430
Estimated Fair Value | Level 1
Financial assets:
Cash and cash equivalents	5,250,742	4,614,984
Interest-bearing deposits with banks	0	0
Resale agreements	0	0
HTM debt securities	499,858	488,551
Restricted equity securities, at cost	0	0
Loans held-for-sale		0
Loans held-for-investment, net	0	0
Mortgage servicing rights	0	0
Accrued interest receivable	0	0
Financial liabilities:
Demand, checking, savings and money market deposits	0	0
Time deposits	0	0
FHLB advances	0
BTFP borrowings		0
Long-term debt	0	0
Accrued interest payable	0	0
Estimated Fair Value | Level 2
Financial assets:
Cash and cash equivalents	0	0
Interest-bearing deposits with banks	48,198	10,498
Resale agreements	329,769	699,056
HTM debt securities	1,887,896	1,965,420
Restricted equity securities, at cost	165,259	79,811
Loans held-for-sale		116
Loans held-for-investment, net	0	0
Mortgage servicing rights	0	0
Accrued interest receivable	316,392	331,490
Financial liabilities:
Demand, checking, savings and money market deposits	39,959,251	38,048,974
Time deposits	23,225,317	18,004,951
FHLB advances	3,497,953
BTFP borrowings		4,500,000
Long-term debt	31,246	150,896
Accrued interest payable	61,950	205,430
Estimated Fair Value | Level 3
Financial assets:
Cash and cash equivalents	0	0
Interest-bearing deposits with banks	0	0
Resale agreements	0	0
HTM debt securities	0	0
Restricted equity securities, at cost	0	0
Loans held-for-sale		0
Loans held-for-investment, net	51,328,254	50,256,565
Mortgage servicing rights	8,822	9,470
Accrued interest receivable	0	0
Financial liabilities:
Demand, checking, savings and money market deposits	0	0
Time deposits	0	0
FHLB advances	0
BTFP borrowings		0
Long-term debt	0	0
Accrued interest payable	$ 0	$ 0

Securities Purchased under Re_3

Securities Purchased under Resale Agreements - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
RESALE AND REPURCHASE AGREEMENTS
Gross resale agreements	$ 425,000	$ 785,000
Average yield	2.17%	2.87%	2.12%

Securities Purchased under Re_4

Securities Purchased under Resale Agreements - Schedule Of Balance Sheet Offsetting For Resale And Repurchase Agreements (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Assets, Resale Agreements
Gross Amounts of Recognized Assets	$ 425,000	$ 785,000
Gross Amounts Offset on the Consolidated Balance Sheet	0	0
Net Amounts of Assets Presented on the Consolidated Balance Sheet	425,000	785,000
Gross Amounts Not Offset on the Consolidated Balance Sheet
Collateral received	(329,603)	(715,358)
Net Amount	$ 95,397	$ 69,642

Securities - Schedule of Debt S

Securities - Schedule of Debt Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
AFS debt securities:
Amortized Cost	$ 11,505,775	$ 6,916,491
Gross Unrealized Gains	15,273	783
Gross Unrealized Losses	(674,237)	(728,937)
Fair Value	10,846,811	6,188,337
HTM debt securities
Amortized Cost	2,917,413	2,956,040
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(529,659)	(502,069)
Fair Value	2,387,754	2,453,971
Total debt securities
Amortized Cost	14,423,188	9,872,531
Gross Unrealized Gains	15,273	783
Gross Unrealized Losses	(1,203,896)	(1,231,006)
Fair Value	13,234,565	8,642,308
AFS and HTM, accrued interest	45,000	44,000
Government National Mortgage Association (GNMA)
AFS debt securities:
Amortized Cost	7,300,000	1,300,000
Fair Value	7,200,000	1,200,000
HTM debt securities
Amortized Cost	86,000	92,000
Fair Value	68,000	75,000
U.S. Treasury securities
AFS debt securities:
Amortized Cost	676,300	1,112,587
Gross Unrealized Gains	0	101
Gross Unrealized Losses	(38,035)	(52,313)
Fair Value	638,265	1,060,375
HTM debt securities
Amortized Cost	535,080	529,548
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(35,222)	(40,997)
Fair Value	499,858	488,551
U.S. government agency and U.S. government-sponsored enterprise debt securities
AFS debt securities:
Amortized Cost	308,220	412,086
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(45,633)	(47,640)
Fair Value	262,587	364,446
HTM debt securities
Amortized Cost	1,004,479	1,001,836
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(200,259)	(186,904)
Fair Value	804,220	814,932
US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
AFS debt securities:
Amortized Cost	472,535	531,377
Gross Unrealized Gains	886	158
Gross Unrealized Losses	(47,207)	(63,276)
Fair Value	426,214	468,259
HTM debt securities
Amortized Cost	486,388	493,348
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(91,461)	(88,968)
Fair Value	394,927	404,380
US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
AFS debt securities:
Amortized Cost	7,974,768	1,956,927
Gross Unrealized Gains	12,278	380
Gross Unrealized Losses	(248,786)	(229,713)
Fair Value	7,738,260	1,727,594
HTM debt securities
Amortized Cost	703,833	742,436
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(155,626)	(142,119)
Fair Value	548,207	600,317
Municipal securities
AFS debt securities:
Amortized Cost	287,301	297,283
Gross Unrealized Gains	38	75
Gross Unrealized Losses	(37,186)	(36,342)
Fair Value	250,153	261,016
HTM debt securities
Amortized Cost	187,633	188,872
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(47,091)	(43,081)
Fair Value	140,542	145,791
Non-agency commercial mortgage-backed Securities
AFS debt securities:
Amortized Cost	294,235	409,578
Gross Unrealized Gains	2	0
Gross Unrealized Losses	(35,767)	(42,062)
Fair Value	258,470	367,516
Non-agency residential mortgage-backed Securities
AFS debt securities:
Amortized Cost	514,527	643,335
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(80,919)	(89,664)
Fair Value	433,608	553,671
Corporate debt securities
AFS debt securities:
Amortized Cost	653,500	653,501
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(127,334)	(151,076)
Fair Value	526,166	502,425
Foreign government bonds
AFS debt securities:
Amortized Cost	244,803	239,333
Gross Unrealized Gains	2,069	69
Gross Unrealized Losses	(12,992)	(11,528)
Fair Value	233,880	227,874
Asset-backed securities
AFS debt securities:
Amortized Cost	35,086	43,234
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(371)	(934)
Fair Value	34,715	42,300
Collateralized loan obligations (“CLOs”)
AFS debt securities:
Amortized Cost	44,500	617,250
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(7)	(4,389)
Fair Value	$ 44,493	$ 612,861

Securities - Schedule of Debt_2

Securities - Schedule of Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	$ 2,735,499	$ 125,924
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(16,861)	(721)
Available-for-sale debt securities, More than 12 Months, Fair Value	4,413,878	5,532,528
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(657,376)	(728,216)
Available-for-sale debt securities, Fair Value, Total	7,149,377	5,658,452
Available-for-sale debt securities, Gross Unrealized Loss, Total	(674,237)	(728,937)
U.S. Treasury securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	0
Available-for-sale debt securities, More than 12 Months, Fair Value	638,265	623,978
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(38,035)	(52,313)
Available-for-sale debt securities, Fair Value, Total	638,265	623,978
Available-for-sale debt securities, Gross Unrealized Loss, Total	(38,035)	(52,313)
U.S. government agency and U.S. government sponsored enterprise debt securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	0
Available-for-sale debt securities, More than 12 Months, Fair Value	262,587	364,446
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(45,633)	(47,640)
Available-for-sale debt securities, Fair Value, Total	262,587	364,446
Available-for-sale debt securities, Gross Unrealized Loss, Total	(45,633)	(47,640)
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	2,741	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(30)	0
Available-for-sale debt securities, More than 12 Months, Fair Value	377,756	463,572
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(47,177)	(63,276)
Available-for-sale debt securities, Fair Value, Total	380,497	463,572
Available-for-sale debt securities, Gross Unrealized Loss, Total	(47,207)	(63,276)
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	2,719,228	9,402
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(16,404)	(558)
Available-for-sale debt securities, More than 12 Months, Fair Value	1,528,252	1,661,112
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(232,382)	(229,155)
Available-for-sale debt securities, Fair Value, Total	4,247,480	1,670,514
Available-for-sale debt securities, Gross Unrealized Loss, Total	(248,786)	(229,713)
Municipal securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	2,763	2,825
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(95)	(15)
Available-for-sale debt securities, More than 12 Months, Fair Value	245,360	254,773
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(37,091)	(36,327)
Available-for-sale debt securities, Fair Value, Total	248,123	257,598
Available-for-sale debt securities, Gross Unrealized Loss, Total	(37,186)	(36,342)
Non-agency commercial mortgage-backed securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	10,767	2,742
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(332)	(4)
Available-for-sale debt securities, More than 12 Months, Fair Value	235,668	364,774
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(35,435)	(42,058)
Available-for-sale debt securities, Fair Value, Total	246,435	367,516
Available-for-sale debt securities, Gross Unrealized Loss, Total	(35,767)	(42,062)
Non-agency residential mortgage-backed Securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	0
Available-for-sale debt securities, More than 12 Months, Fair Value	433,608	553,671
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(80,919)	(89,664)
Available-for-sale debt securities, Fair Value, Total	433,608	553,671
Available-for-sale debt securities, Gross Unrealized Loss, Total	(80,919)	(89,664)
Corporate debt securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	0
Available-for-sale debt securities, More than 12 Months, Fair Value	526,166	502,425
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(127,334)	(151,076)
Available-for-sale debt securities, Fair Value, Total	526,166	502,425
Available-for-sale debt securities, Gross Unrealized Loss, Total	(127,334)	(151,076)
Foreign government bonds
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	110,955
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	(144)
Available-for-sale debt securities, More than 12 Months, Fair Value	87,008	88,616
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(12,992)	(11,384)
Available-for-sale debt securities, Fair Value, Total	87,008	199,571
Available-for-sale debt securities, Gross Unrealized Loss, Total	(12,992)	(11,528)
Asset-backed securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	0
Available-for-sale debt securities, More than 12 Months, Fair Value	34,715	42,300
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(371)	(934)
Available-for-sale debt securities, Fair Value, Total	34,715	42,300
Available-for-sale debt securities, Gross Unrealized Loss, Total	(371)	(934)
Collateralized loan obligations (“CLOs”)
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	0
Available-for-sale debt securities, More than 12 Months, Fair Value	44,493	612,861
Available-for-sale debt securities, Gross Unrealized Loss, More than 12 Months	(7)	(4,389)
Available-for-sale debt securities, Fair Value, Total	44,493	612,861
Available-for-sale debt securities, Gross Unrealized Loss, Total	$ (7)	$ (4,389)

Securities - Narrative (Details

Securities - Narrative (Details)	Dec. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of available-for-sale debt securities in an unrealized loss position	541	547
Allowance for credit loss | $	$ 0	$ 0
HTM securities allowance for credit loss | $	0	0
Asset Pledged as Collateral
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
AFS and HTM debt securities carrying value | $	$ 5,400,000,000	$ 7,000,000,000
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of available-for-sale debt securities in an unrealized loss position	290	255
Non-agency mortgage-backed securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of available-for-sale debt securities in an unrealized loss position	83	99
Corporate debt securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of available-for-sale debt securities in an unrealized loss position	66	66

Securities - Schedule of the Gr

Securities - Schedule of the Gross Realized Gains and Tax Expense, Available-for-Sale (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Gross realized gains from sales	$ 2,069	$ 3,138	$ 1,306
Impairment write-off	0	(10,000)	0
Related tax expense (benefit)	$ 612	(2,029)	$ 386
Available-for-sale, realized loss		$ 7,000

Securities - Schedule of Compos

Securities - Schedule of Composition of Interest Income on Debt Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Taxable interest	$ 429,003	$ 255,475	$ 179,720
Nontaxable interest	20,062	20,715	19,186
Total interest income on debt securities	$ 449,065	$ 276,190	$ 198,906

Securities - Scheduled Contract

Securities - Scheduled Contractual Maturities of AFS Debt Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Amortized cost
Within One Year	$ 181,986
After One Year through Five Years	826,506
After Five Years through Ten Years	785,584
After Ten Years	9,711,699
Amortized Cost	11,505,775	$ 6,916,491
Fair value
Within One Year	180,152
After One Year through Five Years	785,567
After Five Years through Ten Years	703,341
After Ten Years	9,177,751
Total	$ 10,846,811
Weighted-Average Yield
Within One Year	2.62%
After One Year through Five Years	1.40%
After Five Years through Ten Years	3.26%
After Ten Years	4.70%
Total	4.33%
U.S. Treasury securities
Amortized cost
Within One Year	$ 84,143
After One Year through Five Years	592,157
After Five Years through Ten Years	0
After Ten Years	0
Amortized Cost	676,300	1,112,587
Fair value
Within One Year	83,367
After One Year through Five Years	554,898
After Five Years through Ten Years	0
After Ten Years	0
Total	$ 638,265
Weighted-Average Yield
Within One Year	2.23%
After One Year through Five Years	1.06%
After Five Years through Ten Years	0%
After Ten Years	0%
Total	1.21%
U.S. government agency and U.S. government-sponsored enterprise debt securities
Amortized cost
Within One Year	$ 17,972
After One Year through Five Years	27,030
After Five Years through Ten Years	201,546
After Ten Years	61,672
Amortized Cost	308,220	412,086
Fair value
Within One Year	17,595
After One Year through Five Years	25,492
After Five Years through Ten Years	169,448
After Ten Years	50,052
Total	$ 262,587
Weighted-Average Yield
Within One Year	1.06%
After One Year through Five Years	1.13%
After Five Years through Ten Years	2.01%
After Ten Years	2%
Total	1.87%
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities
Amortized cost
Within One Year	$ 8,037
After One Year through Five Years	54,584
After Five Years through Ten Years	125,704
After Ten Years	8,258,978
Amortized Cost	8,447,303
Fair value
Within One Year	7,990
After One Year through Five Years	51,845
After Five Years through Ten Years	114,109
After Ten Years	7,990,530
Total	$ 8,164,474
Weighted-Average Yield
Within One Year	3.24%
After One Year through Five Years	2.89%
After Five Years through Ten Years	2.79%
After Ten Years	5.13%
Total	5.07%
Municipal securities
Amortized cost
Within One Year	$ 5,657
After One Year through Five Years	26,502
After Five Years through Ten Years	8,114
After Ten Years	247,028
Amortized Cost	287,301	297,283
Fair value
Within One Year	5,558
After One Year through Five Years	25,160
After Five Years through Ten Years	7,394
After Ten Years	212,041
Total	$ 250,153
Weighted-Average Yield
Within One Year	2.25%
After One Year through Five Years	2.14%
After Five Years through Ten Years	3.38%
After Ten Years	2.23%
Total	2.25%
Non-agency mortgage-backed securities
Amortized cost
Within One Year	$ 39,936
After One Year through Five Years	7,671
After Five Years through Ten Years	6,220
After Ten Years	754,935
Amortized Cost	808,762
Fair value
Within One Year	39,337
After One Year through Five Years	7,605
After Five Years through Ten Years	6,207
After Ten Years	638,929
Total	$ 692,078
Weighted-Average Yield
Within One Year	3.67%
After One Year through Five Years	2.95%
After Five Years through Ten Years	5.53%
After Ten Years	2.40%
Total	2.49%
Corporate debt securities
Amortized cost
Within One Year	$ 0
After One Year through Five Years	0
After Five Years through Ten Years	349,500
After Ten Years	304,000
Amortized Cost	653,500	653,501
Fair value
Within One Year	0
After One Year through Five Years	0
After Five Years through Ten Years	311,947
After Ten Years	214,219
Total	$ 526,166
Weighted-Average Yield
Within One Year	0%
After One Year through Five Years	0%
After Five Years through Ten Years	3.50%
After Ten Years	1.97%
Total	2.79%
Foreign government bonds
Amortized cost
Within One Year	$ 26,241
After One Year through Five Years	118,562
After Five Years through Ten Years	50,000
After Ten Years	50,000
Amortized Cost	244,803	239,333
Fair value
Within One Year	26,305
After One Year through Five Years	120,567
After Five Years through Ten Years	49,743
After Ten Years	37,265
Total	$ 233,880
Weighted-Average Yield
Within One Year	3.24%
After One Year through Five Years	2.22%
After Five Years through Ten Years	5.01%
After Ten Years	1.50%
Total	2.75%
Asset-backed securities
Amortized cost
Within One Year	$ 0
After One Year through Five Years	0
After Five Years through Ten Years	0
After Ten Years	35,086
Amortized Cost	35,086	43,234
Fair value
Within One Year	0
After One Year through Five Years	0
After Five Years through Ten Years	0
After Ten Years	34,715
Total	$ 34,715
Weighted-Average Yield
Within One Year	0%
After One Year through Five Years	0%
After Five Years through Ten Years	0%
After Ten Years	5.37%
Total	5.37%
Collateralized loan obligations (“CLOs”)
Amortized cost
Within One Year	$ 0
After One Year through Five Years	0
After Five Years through Ten Years	44,500
After Ten Years	0
Amortized Cost	44,500	$ 617,250
Fair value
Within One Year	0
After One Year through Five Years	0
After Five Years through Ten Years	44,493
After Ten Years	0
Total	$ 44,493
Weighted-Average Yield
Within One Year	0%
After One Year through Five Years	0%
After Five Years through Ten Years	6.08%
After Ten Years	0%
Total	6.08%

Securities - Scheduled Contra_2

Securities - Scheduled Contractual Maturities of HTM Debt Securities (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Amortized cost
Within One Year	$ 0
After One Year through Five Years	538,743
After Five Years through Ten Years	466,105
After Ten Years	1,912,565
Total	2,917,413
Fair value
Within One Year	0
After One Year through Five Years	503,229
After Five Years through Ten Years	396,617
After Ten Years	1,487,908
Total	$ 2,387,754
Weighted Average Yield
Within One Year	0%
After One Year through Five Years	1.05%
After Five Years through Ten Years	1.83%
After Ten Years	1.79%
Total	1.66%
U.S. Treasury securities
Amortized cost
Within One Year	$ 0
After One Year through Five Years	535,080
After Five Years through Ten Years	0
After Ten Years	0
Total	535,080
Fair value
Within One Year	0
After One Year through Five Years	499,858
After Five Years through Ten Years	0
After Ten Years	0
Total	$ 499,858
Weighted Average Yield
Within One Year	0%
After One Year through Five Years	1.05%
After Five Years through Ten Years	0%
After Ten Years	0%
Total	1.05%
U.S. government agency and U.S. government-sponsored enterprise debt securities
Amortized cost
Within One Year	$ 0
After One Year through Five Years	0
After Five Years through Ten Years	371,825
After Ten Years	632,654
Total	1,004,479
Fair value
Within One Year	0
After One Year through Five Years	0
After Five Years through Ten Years	316,243
After Ten Years	487,977
Total	$ 804,220
Weighted Average Yield
Within One Year	0%
After One Year through Five Years	0%
After Five Years through Ten Years	1.89%
After Ten Years	1.90%
Total	1.90%
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities
Amortized cost
Within One Year	$ 0
After One Year through Five Years	3,663
After Five Years through Ten Years	94,280
After Ten Years	1,092,278
Total	1,190,221
Fair value
Within One Year	0
After One Year through Five Years	3,371
After Five Years through Ten Years	80,374
After Ten Years	859,389
Total	$ 943,134
Weighted Average Yield
Within One Year	0%
After One Year through Five Years	1.42%
After Five Years through Ten Years	1.62%
After Ten Years	1.69%
Total	1.68%
Municipal securities
Amortized cost
Within One Year	$ 0
After One Year through Five Years	0
After Five Years through Ten Years	0
After Ten Years	187,633
Total	187,633
Fair value
Within One Year	0
After One Year through Five Years	0
After Five Years through Ten Years	0
After Ten Years	140,542
Total	$ 140,542
Weighted Average Yield
Within One Year	0%
After One Year through Five Years	0%
After Five Years through Ten Years	0%
After Ten Years	2.01%
Total	2.01%

Securities - Schedule Of Restri

Securities - Schedule Of Restricted Equity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
FRB of San Francisco stock	$ 63,930	$ 62,561
FHLB stock	101,329	17,250
Total restricted equity securities	$ 165,259	$ 79,811

Derivatives - Narrative (Detail

Derivatives - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Derivative assets - Fair value	$ 523,133,000	$ 610,920,000
Derivative liabilities - Fair value	545,885,000	613,314,000
Derivative instruments designated as hedging instruments
Derivative [Line Items]
Derivative assets - Fair value	5,647,000	53,815,000
Derivative liabilities - Fair value	35,211,000	13,124,000
Notional amount	5,250,000,000	5,331,480,000
Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative assets - Fair value	517,486,000	557,105,000
Derivative liabilities - Fair value	510,674,000	600,190,000
Notional amount	22,375,840,000	23,333,449,000
Interest rate contracts | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative assets - Fair value	379,664,000	423,486,000
Derivative liabilities - Fair value	378,961,000	420,812,000
Notional amount	17,005,381,000	17,387,909,000
Interest rate contracts | Derivatives not designated as hedging instruments | LCH
Derivative [Line Items]
Derivative assets - Fair value	17,000,000	43,000,000
Derivative liabilities - Fair value	15,000,000	43,000,000
Interest rate contracts | Cash Flow Hedging | Derivative instruments designated as hedging instruments
Derivative [Line Items]
Derivative assets - Fair value	5,647,000	50,421,000
Derivative liabilities - Fair value	35,211,000	13,124,000
Notional amount	5,250,000,000	5,250,000,000
Net unrealized losses, net of tax, recorded in AOCI expected to be reclassified into earnings during the next 12 months	11,000,000
Foreign exchange contracts | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative assets - Fair value	89,083,000	53,678,000
Derivative liabilities - Fair value	71,254,000	42,564,000
Notional amount	$ 5,201,460,000	$ 5,827,149,000
Foreign exchange contracts | Derivatives not designated as hedging instruments | Maximum
Derivative [Line Items]
Original maturity (in years)	1 year	1 year
Credit contracts | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative assets - Fair value	$ 1,000	$ 1,000
Derivative liabilities - Fair value	12,000	25,000
Notional amount	168,999,000	118,391,000
Credit contracts | Derivatives not designated as hedging instruments | RPAs
Derivative [Line Items]
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	12,000	25,000
Notional amount	133,174,000	93,393,000
Maximum exposure of RPAs with protection sold	170,000	177,000
Credit-Risk-Related Contingent Features
Derivative [Line Items]
Aggregate fair value of derivative instruments in net liability position	1,000,000	9,000
Associated posted collateral	1,000,000	$ 0
Commercial Banking | Interest rate contracts | Cash Flow Hedging | Derivative instruments designated as hedging instruments
Derivative [Line Items]
Notional amount	$ 5,300,000,000

Derivatives - Schedule Of Notio

Derivatives - Schedule Of Notional And Gross Fair Values Of Derivatives (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) MMBTU Boe company shares	Dec. 31, 2023 USD ($) MMBTU Boe company shares
Derivative assets:
Derivative assets - Fair value	$ 523,133	$ 610,920
Less: Master netting agreements	(111,124)	(75,534)
Less: Cash collateral received/paid	(316,168)	(237,258)
Net derivative assets	95,841	298,128
Derivative liabilities:
Derivative liabilities - Fair value	545,885	613,314
Less: Master netting agreements	(111,124)	(75,534)
Less: Cash collateral received/paid	(1,160)	(636)
Net derivative liabilities	433,601	537,144
Derivative instruments designated as hedging instruments
Derivative Instruments
Notional Amount	5,250,000	5,331,480
Derivative assets:
Derivative assets - Fair value	5,647	53,815
Derivative liabilities:
Derivative liabilities - Fair value	35,211	13,124
Derivatives not designated as hedging instruments
Derivative Instruments
Notional Amount	22,375,840	23,333,449
Derivative assets:
Derivative assets - Fair value	517,486	557,105
Derivative liabilities:
Derivative liabilities - Fair value	$ 510,674	$ 600,190
Derivatives not designated as hedging instruments | Performance-Based RSUs | Rayliant Global Advisors Limited
Derivative liabilities:
Derivative liability granted number of shares | shares	349,138	349,138
Derivatives not designated as hedging instruments | Crude Oil
Derivative liabilities:
Derivative, nonmonetary notional amount, energy measure | Boe	20,614	18,631
Derivatives not designated as hedging instruments | Natural Gas
Derivative liabilities:
Derivative, nonmonetary notional amount, energy measure | MMBTU	406,726	328,844
Interest rate contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional Amount	$ 17,005,381	$ 17,387,909
Derivative assets:
Derivative assets - Fair value	379,664	423,486
Derivative liabilities:
Derivative liabilities - Fair value	378,961	420,812
Interest rate contracts | Cash Flow Hedging | Derivative instruments designated as hedging instruments
Derivative Instruments
Notional Amount	5,250,000	5,250,000
Derivative assets:
Derivative assets - Fair value	5,647	50,421
Derivative liabilities:
Derivative liabilities - Fair value	35,211	13,124
Commodity contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional Amount	0	0
Derivative assets:
Derivative assets - Fair value	48,499	79,604
Derivative liabilities:
Derivative liabilities - Fair value	45,328	121,670
Foreign exchange contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional Amount	5,201,460	5,827,149
Derivative assets:
Derivative assets - Fair value	89,083	53,678
Derivative liabilities:
Derivative liabilities - Fair value	71,254	42,564
Foreign exchange contracts | Net investment hedges | Derivative instruments designated as hedging instruments
Derivative Instruments
Notional Amount	0	81,480
Derivative assets:
Derivative assets - Fair value	0	3,394
Derivative liabilities:
Derivative liabilities - Fair value	0	0
Credit contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional Amount	168,999	118,391
Derivative assets:
Derivative assets - Fair value	1	1
Derivative liabilities:
Derivative liabilities - Fair value	12	25
Equity contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional Amount	0	0
Derivative assets:
Derivative assets - Fair value	239	336
Derivative liabilities:
Derivative liabilities - Fair value	$ 15,119	$ 15,119
Public Companies | Derivatives not designated as hedging instruments
Derivative liabilities:
Number of companies that issued the equity (issuers portion only) | company	0	1
Private Companies | Derivatives not designated as hedging instruments
Derivative liabilities:
Number of companies that issued the equity (issuers portion only) | company	8	11

Derivatives - Schedule Of Pre-T

Derivatives - Schedule Of Pre-Tax Changes In AOCI From Cash Flows Hedges (Details) - Derivative instruments designated as hedging instruments - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Interest rate contracts | Cash Flow Hedging
Derivative [Line Items]
Losses recognized in AOCI:	$ (124,382)	$ (5,767)	$ (74,069)
Gains (losses) reclassified from AOCI into earnings:	(91,083)	(79,843)	(4,004)
Interest rate contracts | Cash Flow Hedging | Interest expense (for cash flow hedges on borrowings)
Derivative [Line Items]
Gains (losses) reclassified from AOCI into earnings:	0	696	3,200
Interest rate contracts | Cash Flow Hedging | Interest and dividend income (for cash flow hedges on loans)
Derivative [Line Items]
Gains (losses) reclassified from AOCI into earnings:	(91,083)	(82,153)	(7,204)
Interest rate contracts | Cash Flow Hedging | Noninterest income
Derivative [Line Items]
Gains (losses) reclassified from AOCI into earnings:	0	1,614	0
Foreign exchange contracts | Net investment hedges
Derivative [Line Items]
Gains recognized in AOCI	$ 586	$ 2,571	$ 4,509

Derivatives - Schedule of Deriv

Derivatives - Schedule of Derivatives Not Designated as Hedging Instruments (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) MMBTU Boe	Dec. 31, 2023 USD ($) Boe MMBTU
Derivative [Line Items]
Derivative assets - Fair value	$ 523,133	$ 610,920
Derivative liabilities - Fair value	545,885	613,314
Customer-related positions:
Derivative [Line Items]
Notional Amount	10,994,794	11,362,194
Derivative assets - Fair value	39,718	43,195
Derivative liabilities - Fair value	416,216	419,499
Economic hedges:
Derivative [Line Items]
Notional Amount	11,212,047	11,852,864
Derivative assets - Fair value	429,029	433,969
Derivative liabilities - Fair value	33,999	43,877
Interest rate contracts | Customer-related positions:
Derivative [Line Items]
Notional Amount	8,493,839	8,681,085
Derivative assets - Fair value	11,908	26,089
Derivative liabilities - Fair value	366,649	394,625
Interest rate contracts | Economic hedges:
Derivative [Line Items]
Notional Amount	8,511,542	8,706,824
Derivative assets - Fair value	367,756	397,397
Derivative liabilities - Fair value	12,312	26,187
Interest rate contracts | Swaps | Customer-related positions:
Derivative [Line Items]
Notional Amount	6,854,372	6,835,822
Derivative assets - Fair value	11,828	25,649
Derivative liabilities - Fair value	361,256	377,388
Interest rate contracts | Swaps | Economic hedges:
Derivative [Line Items]
Notional Amount	6,872,075	6,861,561
Derivative assets - Fair value	362,323	380,123
Derivative liabilities - Fair value	12,228	25,731
Interest rate contracts | Written options | Customer-related positions:
Derivative [Line Items]
Notional Amount	1,458,428	1,522,531
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	4,953	12,756
Interest rate contracts | Collars and corridors | Customer-related positions:
Derivative [Line Items]
Notional Amount	181,039	322,732
Derivative assets - Fair value	80	440
Derivative liabilities - Fair value	440	4,481
Interest rate contracts | Collars and corridors | Economic hedges:
Derivative [Line Items]
Notional Amount	181,039	322,732
Derivative assets - Fair value	443	4,491
Derivative liabilities - Fair value	84	456
Interest rate contracts | Purchased options | Economic hedges:
Derivative [Line Items]
Notional Amount	1,458,428	1,522,531
Derivative assets - Fair value	4,990	12,783
Derivative liabilities - Fair value	0	0
Foreign exchange contracts | Customer-related positions:
Derivative [Line Items]
Notional Amount	2,500,955	2,681,109
Derivative assets - Fair value	27,810	17,106
Derivative liabilities - Fair value	49,567	24,874
Foreign exchange contracts | Economic hedges:
Derivative [Line Items]
Notional Amount	2,700,505	3,146,040
Derivative assets - Fair value	61,273	36,572
Derivative liabilities - Fair value	21,687	17,690
Foreign exchange contracts | Swaps | Customer-related positions:
Derivative [Line Items]
Notional Amount	1,504,469	1,588,491
Derivative assets - Fair value	16,117	5,801
Derivative liabilities - Fair value	25,366	18,118
Foreign exchange contracts | Swaps | Economic hedges:
Derivative [Line Items]
Notional Amount	2,613,755	2,862,037
Derivative assets - Fair value	58,955	36,280
Derivative liabilities - Fair value	19,949	15,757
Foreign exchange contracts | Written options | Economic hedges:
Derivative [Line Items]
Notional Amount	0	136,000
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	1,839
Foreign exchange contracts | Forwards and spot | Customer-related positions:
Derivative [Line Items]
Notional Amount	996,486	956,618
Derivative assets - Fair value	11,693	9,466
Derivative liabilities - Fair value	24,201	6,756
Foreign exchange contracts | Forwards and spot | Economic hedges:
Derivative [Line Items]
Notional Amount	86,750	148,003
Derivative assets - Fair value	2,318	292
Derivative liabilities - Fair value	1,738	94
Foreign exchange contracts | Purchased options | Customer-related positions:
Derivative [Line Items]
Notional Amount	0	136,000
Derivative assets - Fair value	0	1,839
Derivative liabilities - Fair value	0	0
Commodity contracts | Customer-related positions:
Derivative [Line Items]
Derivative assets - Fair value	25,609	6,014
Derivative liabilities - Fair value	32,500	114,974
Commodity contracts | Customer-related positions: | Crude Oil
Derivative [Line Items]
Derivative assets - Fair value	6,286	5,555
Derivative liabilities - Fair value	$ 10,236	$ 20,548
Derivative, nonmonetary notional amount, energy measure | Boe	10,307	9,243
Commodity contracts | Customer-related positions: | Natural Gas
Derivative [Line Items]
Derivative assets - Fair value	$ 19,323	$ 459
Derivative liabilities - Fair value	$ 22,264	$ 94,426
Derivative, nonmonetary notional amount, energy measure | MMBTU	205,015	166,053
Commodity contracts | Economic hedges:
Derivative [Line Items]
Derivative assets - Fair value	$ 22,890	$ 73,590
Derivative liabilities - Fair value	12,828	6,696
Commodity contracts | Economic hedges: | Crude Oil
Derivative [Line Items]
Derivative assets - Fair value	6,026	10,851
Derivative liabilities - Fair value	$ 3,969	$ 6,391
Derivative, nonmonetary notional amount, energy measure | Boe	10,307	9,388
Commodity contracts | Economic hedges: | Natural Gas
Derivative [Line Items]
Derivative assets - Fair value	$ 16,864	$ 62,739
Derivative liabilities - Fair value	$ 8,859	$ 305
Derivative, nonmonetary notional amount, energy measure | MMBTU	201,711	162,791
Commodity contracts | Swaps | Customer-related positions: | Crude Oil
Derivative [Line Items]
Derivative assets - Fair value	$ 4,682	$ 3,735
Derivative liabilities - Fair value	$ 6,874	$ 15,445
Derivative, nonmonetary notional amount, energy measure | Boe	4,830	3,277
Commodity contracts | Swaps | Customer-related positions: | Natural Gas
Derivative [Line Items]
Derivative assets - Fair value	$ 13,095	$ 438
Derivative liabilities - Fair value	$ 17,708	$ 73,793
Derivative, nonmonetary notional amount, energy measure | MMBTU	141,736	118,325
Commodity contracts | Swaps | Economic hedges: | Crude Oil
Derivative [Line Items]
Derivative assets - Fair value	$ 4,479	$ 9,166
Derivative liabilities - Fair value	$ 3,893	$ 4,924
Derivative, nonmonetary notional amount, energy measure | Boe	4,830	3,422
Commodity contracts | Swaps | Economic hedges: | Natural Gas
Derivative [Line Items]
Derivative assets - Fair value	$ 13,323	$ 49,941
Derivative liabilities - Fair value	$ 5,056	$ 305
Derivative, nonmonetary notional amount, energy measure | MMBTU	139,136	116,463
Commodity contracts | Written options | Customer-related positions: | Natural Gas
Derivative [Line Items]
Derivative assets - Fair value	$ 167	$ 0
Derivative liabilities - Fair value	$ 0	$ 233
Derivative, nonmonetary notional amount, energy measure | MMBTU	1,234	1,874
Commodity contracts | Collars | Customer-related positions: | Crude Oil
Derivative [Line Items]
Derivative assets - Fair value	$ 1,604	$ 1,820
Derivative liabilities - Fair value	$ 3,362	$ 5,103
Derivative, nonmonetary notional amount, energy measure | Boe	5,477	5,966
Commodity contracts | Collars | Customer-related positions: | Natural Gas
Derivative [Line Items]
Derivative assets - Fair value	$ 6,061	$ 21
Derivative liabilities - Fair value	$ 4,556	$ 20,400
Derivative, nonmonetary notional amount, energy measure | MMBTU	62,045	45,854
Commodity contracts | Collars | Economic hedges: | Crude Oil
Derivative [Line Items]
Derivative assets - Fair value	$ 1,547	$ 1,685
Derivative liabilities - Fair value	$ 76	$ 1,467
Derivative, nonmonetary notional amount, energy measure | Boe	5,477	5,966
Commodity contracts | Collars | Economic hedges: | Natural Gas
Derivative [Line Items]
Derivative assets - Fair value	$ 3,541	$ 12,565
Derivative liabilities - Fair value	$ 3,650	$ 0
Derivative, nonmonetary notional amount, energy measure | MMBTU	61,341	44,454
Commodity contracts | Purchased options | Economic hedges: | Natural Gas
Derivative [Line Items]
Derivative assets - Fair value	$ 0	$ 233
Derivative liabilities - Fair value	$ 153	$ 0
Derivative, nonmonetary notional amount, energy measure | MMBTU	1,234	1,874

Derivatives - Schedule Of Not_2

Derivatives - Schedule Of Notional Amounts And The Gross Fair Values Of RPAs Sold And Purchased Outstanding (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Derivative assets - Fair value	$ 523,133	$ 610,920
Derivative liabilities - Fair value	545,885	613,314
Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional Amount	22,375,840	23,333,449
Derivative assets - Fair value	517,486	557,105
Derivative liabilities - Fair value	510,674	600,190
Credit Risk Contract | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional Amount	168,999	118,391
Derivative assets - Fair value	1	1
Derivative liabilities - Fair value	12	25
Credit Risk Contract | Derivatives not designated as hedging instruments | RPAs — protection sold
Derivative [Line Items]
Notional Amount	133,174	93,393
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	$ 12	$ 25
Weighted average remaining maturity of outstanding RPAs	1 year 7 months 6 days	2 years 9 months 18 days
Credit Risk Contract | Derivatives not designated as hedging instruments | RPAs — protection purchased
Derivative [Line Items]
Notional Amount	$ 35,825	$ 24,998
Derivative assets - Fair value	1	1
Derivative liabilities - Fair value	$ 0	$ 0

Derivatives - Schedule Of The N

Derivatives - Schedule Of The Net Gains (Losses) Recognized On The Company’s Consolidated Statement of Income Related To Derivatives Not Designated as Hedging Instruments (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Net gains	$ 55,454	$ 49,815	$ 28,021
Interest rate contracts | Customer derivative income
Derivative Instruments, Gain (Loss) [Line Items]
Net gains	549	(2,989)	13,905
Foreign exchange contracts | Foreign exchange income
Derivative Instruments, Gain (Loss) [Line Items]
Net gains	54,073	52,817	13,799
Credit contracts | Customer derivative income
Derivative Instruments, Gain (Loss) [Line Items]
Net gains	0	(1)	118
Equity contracts | Lending fees
Derivative Instruments, Gain (Loss) [Line Items]
Net gains	(97)	13	151
Commodity contracts | Customer derivative income
Derivative Instruments, Gain (Loss) [Line Items]
Net gains	$ 929	$ (25)	$ 48

Derivatives - Schedule Of Gross

Derivatives - Schedule Of Gross Derivative Fair Values, The Balance Sheet Netting Adjustments And The Resulting Net Fair Values Recorded, Cash and Non-Cash Collateral Associated With Master Netting Arrangements (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Assets
Gross amounts recognized	$ 523,133	$ 610,920
Less: Master netting agreements	(111,124)	(75,534)
Less: Cash collateral received/paid	(316,168)	(237,258)
Net derivative assets	95,841	298,128
Less: security collateral received	(55,222)	(246,259)
Net Amount	40,619	51,869
Contracts not subject to master netting arrangements, gross amounts recognized	4,000	3,000
Derivative, cash collateral received, including amount offset by fair value assets, and excess cash amount	322,000	244,000
Liabilities
Gross amounts recognized	545,885	613,314
Less: Master netting agreements	(111,124)	(75,534)
Less: Cash collateral received	(1,160)	(636)
Net derivative liabilities	433,601	537,144
Less: security collateral pledged	0	0
Net Amount	433,601	537,144
Contracts not subject to master netting arrangements, gross amounts recognized	27,000	16,000
Derivative, cash collateral posted against derivative liabilities, including amount offset the derivative fair value liabilities, and excess cash amount	$ 1,000	$ 1,000
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other liabilities	Accrued expenses and other liabilities

Loans Receivable and Allowanc_3

Loans Receivable and Allowance for Credit Losses - Schedule Of Composition Of Loans Held-For-Investment (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	$ 53,726,637	$ 52,210,782
Allowance for loan losses	(702,052)	(668,743)	$ (595,645)	$ (541,579)
Loans held-for-investment, net	53,024,585	51,542,039
Net deferred loan fees and net unamortized premiums	(46,000)	(71,000)
Commercial lending
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	37,672,102	37,045,191
Commercial lending | C&I
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	17,397,158	16,581,079
Allowance for loan losses	(384,319)	(392,685)	(371,700)	(338,252)
Commercial lending | CRE
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	14,655,340	14,777,081
Allowance for loan losses	(218,677)	(170,592)	(149,864)	(150,940)
Commercial lending | Multifamily Residential
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	4,953,442	5,023,163
Allowance for loan losses	(32,117)	(34,375)	(23,373)	(14,400)
Commercial lending | Construction and land
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	666,162	663,868
Allowance for loan losses	(17,497)	(10,469)	(9,109)	(15,468)
Commercial lending | Total CRE
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	20,274,944	20,464,112
Consumer Lending
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	16,054,535	15,165,591
Consumer Lending | Single-Family Residential
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	14,175,446	13,383,060
Allowance for loan losses	(44,816)	(55,018)	(35,564)	(17,160)
Consumer Lending | HELOCs
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	1,811,628	1,722,204
Allowance for loan losses	(3,132)	(3,947)	(4,475)	(3,435)
Consumer Lending | Total residential mortgage
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	15,987,074	15,105,264
Consumer Lending | Other consumer
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	67,461	60,327
Allowance for loan losses	$ (1,494)	$ (1,657)	$ (1,560)	$ (1,924)

Loans Receivable and Allowanc_4

Loans Receivable and Allowance for Credit Losses - Composition of Loans Held-for-Investment- Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Accrued interest receivable	$ 255,000	$ 267,000
Loans held-for-investment	53,726,637	52,210,782
Asset Pledged as Collateral
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Loans held-for-investment	$ 38,200,000	$ 37,200,000

Loans Receivable and Allowanc_5

Loans Receivable and Allowance for Credit Losses - Schedule Of Loans Held-For-Investment By Loan Portfolio Segments, Internal Risk Ratings, Gross Write-Offs And Vintage Year (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	$ 7,211,782	$ 9,030,294
Year 2	7,563,807	10,960,065
Year 3	9,549,557	6,936,329
Year 4	5,603,650	4,082,547
Year 5	3,663,285	3,402,102
Prior	7,419,863	5,723,462
Revolving Loans	12,520,741	11,860,890
Revolving Loans Converted to Term Loans	193,952	215,093
Total	53,726,637	52,210,782
Gross write-offs Total	146,257	54,372	$ 37,920
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	7,127,517	8,877,690
Year 2	7,422,477	10,839,026
Year 3	9,316,206	6,723,921
Year 4	5,414,088	4,010,720
Year 5	3,567,683	3,326,731
Prior	7,175,711	5,504,224
Revolving Loans	12,356,727	11,739,785
Revolving Loans Converted to Term Loans	173,075	210,475
Total	52,553,484	51,232,572
Pass | Federal Housing Administration Loan
Financing Receivable, Credit Quality Indicator [Line Items]
Nonaccrual loans	1,000	1,000
Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	74,566	145,219
Year 2	99,381	111,430
Year 3	197,313	207,962
Year 4	176,822	64,855
Year 5	87,799	67,738
Prior	209,605	158,049
Revolving Loans	154,085	119,744
Revolving Loans Converted to Term Loans	15,365	1,089
Total	1,014,936	876,086
Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	9,699	7,385
Year 2	41,949	9,609
Year 3	36,038	4,446
Year 4	12,740	6,972
Year 5	7,803	7,633
Prior	34,547	61,189
Revolving Loans	9,929	1,361
Revolving Loans Converted to Term Loans	5,512	3,529
Total	158,217	102,124
Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	29	350
Gross write-offs year 2	50,973	10,454
Gross write-offs year 3	17,137	424
Gross write-offs year 4	11,119	3,758
Gross write-offs year 5	1,568	9,748
Gross write-offs year Prior	3,025	4,021
Gross write-offs year Revolving Loans	27,989	1,593
Gross write-offs Revolving Loans Converted to Term Loans	5	6
Gross write-offs Total	111,845	30,354
Consumer Loan
Financing Receivable, Credit Quality Indicator [Line Items]
Converted to term loan	22,000	44,000	0
Commercial lending
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	4,817,251	5,827,011
Year 2	4,781,421	7,589,913
Year 3	6,441,207	4,647,905
Year 4	3,513,075	2,481,175
Year 5	2,244,179	2,414,789
Prior	4,939,166	3,719,778
Revolving Loans	10,847,445	10,280,425
Revolving Loans Converted to Term Loans	88,358	84,195
Total	37,672,102	37,045,191
Converted to term loan	7,000	29,000	26,000
Commercial lending | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	20	350
Gross write-offs year 2	47,963	10,454
Gross write-offs year 3	17,137	424
Gross write-offs year 4	11,119	3,758
Gross write-offs year 5	1,568	9,748
Gross write-offs year Prior	3,025	3,980
Gross write-offs year Revolving Loans	27,099	1,593
Gross write-offs Revolving Loans Converted to Term Loans	0	0
Gross write-offs Total	107,931	30,307
Commercial lending | C&I
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,644,162	2,421,686
Year 2	1,589,544	1,704,375
Year 3	1,080,900	1,417,641
Year 4	730,036	351,865
Year 5	257,291	289,072
Prior	336,179	204,394
Revolving Loans	10,736,014	10,171,903
Revolving Loans Converted to Term Loans	23,032	20,143
Total	17,397,158	16,581,079
Gross write-offs Total	125,413	36,573	18,738
Commercial lending | C&I | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,605,928	2,314,463
Year 2	1,508,948	1,628,560
Year 3	999,586	1,296,936
Year 4	612,015	331,982
Year 5	243,528	245,173
Prior	295,884	164,159
Revolving Loans	10,574,404	10,053,757
Revolving Loans Converted to Term Loans	23,032	20,143
Total	16,863,325	16,055,173
Commercial lending | C&I | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	34,412	105,119
Year 2	51,415	67,899
Year 3	61,041	120,574
Year 4	107,355	15,064
Year 5	10,538	40,920
Prior	31,160	22,098
Revolving Loans	151,747	117,196
Revolving Loans Converted to Term Loans	0	0
Total	447,668	488,870
Commercial lending | C&I | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	3,822	2,104
Year 2	29,181	7,916
Year 3	20,273	131
Year 4	10,666	4,819
Year 5	3,225	2,979
Prior	9,135	18,137
Revolving Loans	9,863	950
Revolving Loans Converted to Term Loans	0	0
Total	86,165	37,036
Commercial lending | C&I | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	20	350
Gross write-offs year 2	47,963	10,454
Gross write-offs year 3	14,848	424
Gross write-offs year 4	11,119	3,758
Gross write-offs year 5	1,568	9,748
Gross write-offs year Prior	3,012	2,648
Gross write-offs year Revolving Loans	27,099	1,593
Gross write-offs Revolving Loans Converted to Term Loans	0	0
Gross write-offs Total	105,629	28,975
Commercial lending | CRE
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	1,695,420	2,529,770
Year 2	2,341,320	4,120,870
Year 3	3,782,603	2,246,593
Year 4	1,956,835	1,476,974
Year 5	1,373,773	1,625,725
Prior	3,344,525	2,621,527
Revolving Loans	96,791	92,851
Revolving Loans Converted to Term Loans	64,073	62,771
Total	14,655,340	14,777,081
Gross write-offs Total	14,236	7,048	10,871
Commercial lending | CRE | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	1,660,877	2,492,915
Year 2	2,296,763	4,086,385
Year 3	3,692,498	2,216,257
Year 4	1,925,220	1,428,724
Year 5	1,296,439	1,600,844
Prior	3,176,450	2,494,382
Revolving Loans	96,791	92,851
Revolving Loans Converted to Term Loans	49,302	62,771
Total	14,194,340	14,475,129
Commercial lending | CRE | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	34,543	36,855
Year 2	44,557	34,485
Year 3	90,105	30,336
Year 4	31,615	48,250
Year 5	75,578	24,437
Prior	167,401	104,340
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	14,771	0
Total	458,570	278,703
Commercial lending | CRE | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	0
Year 5	1,756	444
Prior	674	22,805
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	2,430	23,249
Commercial lending | CRE | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	0	0
Gross write-offs year 2	0	0
Gross write-offs year 3	0	0
Gross write-offs year 4	0	0
Gross write-offs year 5	0	0
Gross write-offs year Prior	3	1,329
Gross write-offs year Revolving Loans	0	0
Gross write-offs Revolving Loans Converted to Term Loans	0	0
Gross write-offs Total	3	1,329
Commercial lending | Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	386,743	665,780
Year 2	521,754	1,484,517
Year 3	1,381,596	862,947
Year 4	784,272	612,408
Year 5	613,115	499,184
Prior	1,250,069	888,356
Revolving Loans	14,640	8,690
Revolving Loans Converted to Term Loans	1,253	1,281
Total	4,953,442	5,023,163
Gross write-offs Total	10	3	7,237
Commercial lending | Multifamily Residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	386,743	665,780
Year 2	521,754	1,481,161
Year 3	1,337,599	808,333
Year 4	752,230	612,408
Year 5	613,115	498,491
Prior	1,242,586	857,713
Revolving Loans	14,640	8,690
Revolving Loans Converted to Term Loans	1,253	1,281
Total	4,869,920	4,933,857
Commercial lending | Multifamily Residential | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	0
Year 2	0	3,356
Year 3	43,997	54,614
Year 4	32,042	0
Year 5	0	693
Prior	2,911	25,974
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	78,950	84,637
Commercial lending | Multifamily Residential | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	4,572	4,669
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	4,572	4,669
Commercial lending | Multifamily Residential | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	0	0
Gross write-offs year 2	0	0
Gross write-offs year 3	0	0
Gross write-offs year 4	0	0
Gross write-offs year 5	0	0
Gross write-offs year Prior	10	3
Gross write-offs year Revolving Loans	0	0
Gross write-offs Revolving Loans Converted to Term Loans	0	0
Gross write-offs Total	10	3
Commercial lending | Construction and land
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	90,926	209,775
Year 2	328,803	280,151
Year 3	196,108	120,724
Year 4	41,932	39,928
Year 5	0	808
Prior	8,393	5,501
Revolving Loans	0	6,981
Revolving Loans Converted to Term Loans	0	0
Total	666,162	663,868
Gross write-offs Total	2,289	10,413	0
Commercial lending | Construction and land | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	90,926	209,775
Year 2	328,803	280,151
Year 3	184,792	120,724
Year 4	41,932	39,928
Year 5	0	808
Prior	8,393	5,501
Revolving Loans	0	6,981
Revolving Loans Converted to Term Loans	0	0
Total	654,846	663,868
Commercial lending | Construction and land | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0
Year 2	0
Year 3	11,316
Year 4	0
Year 5	0
Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total	11,316
Commercial lending | Construction and land | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	0
Gross write-offs year 2	0
Gross write-offs year 3	2,289
Gross write-offs year 4	0
Gross write-offs year 5	0
Gross write-offs year Prior	0
Gross write-offs year Revolving Loans	0
Gross write-offs Revolving Loans Converted to Term Loans	0
Gross write-offs Total	2,289
Commercial lending | Total CRE
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,173,089	3,405,325
Year 2	3,191,877	5,885,538
Year 3	5,360,307	3,230,264
Year 4	2,783,039	2,129,310
Year 5	1,986,888	2,125,717
Prior	4,602,987	3,515,384
Revolving Loans	111,431	108,522
Revolving Loans Converted to Term Loans	65,326	64,052
Total	20,274,944	20,464,112
Gross write-offs year 1	0
Gross write-offs year 2	0
Gross write-offs year 3	2,289
Gross write-offs year 4	0
Gross write-offs year 5	0
Gross write-offs year Prior	13
Gross write-offs year Revolving Loans	0
Gross write-offs Revolving Loans Converted to Term Loans	0
Gross write-offs Total	2,302
Commercial lending | Total CRE | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1		0
Gross write-offs year 2		0
Gross write-offs year 3		0
Gross write-offs year 4		0
Gross write-offs year 5		0
Gross write-offs year Prior		1,332
Gross write-offs year Revolving Loans		0
Gross write-offs Revolving Loans Converted to Term Loans		0
Gross write-offs Total		1,332
Consumer Lending
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,394,531	3,203,283
Year 2	2,782,386	3,370,152
Year 3	3,108,350	2,288,424
Year 4	2,090,575	1,601,372
Year 5	1,419,106	987,313
Prior	2,480,697	2,003,684
Revolving Loans	1,673,296	1,580,465
Revolving Loans Converted to Term Loans	105,594	130,898
Total	16,054,535	15,165,591
Consumer Lending | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	9	0
Gross write-offs year 2	3,010	0
Gross write-offs year 3	0	0
Gross write-offs year 4	0	0
Gross write-offs year 5	0	0
Gross write-offs year Prior	0	41
Gross write-offs year Revolving Loans	890	0
Gross write-offs Revolving Loans Converted to Term Loans	5	6
Gross write-offs Total	3,914	47
Consumer Lending | Single-Family Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,367,565	3,195,976
Year 2	2,776,003	3,346,097
Year 3	3,077,347	2,284,270
Year 4	2,087,168	1,598,046
Year 5	1,410,983	985,815
Prior	2,456,380	1,972,856
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	14,175,446	13,383,060
Gross write-offs Total	35	0	775
Consumer Lending | Single-Family Residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,360,674	3,188,830
Year 2	2,762,921	3,340,789
Year 3	3,074,668	2,279,802
Year 4	2,079,323	1,594,525
Year 5	1,407,031	980,686
Prior	2,437,446	1,959,974
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	14,122,063	13,344,606
Consumer Lending | Single-Family Residential | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	4,175	2,680
Year 2	3,409	4,471
Year 3	750	566
Year 4	5,810	1,440
Year 5	1,548	1,503
Prior	6,069	4,167
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	21,761	14,827
Consumer Lending | Single-Family Residential | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,716	4,466
Year 2	9,673	837
Year 3	1,929	3,902
Year 4	2,035	2,081
Year 5	2,404	3,626
Prior	12,865	8,715
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	31,622	23,627
Consumer Lending | Single-Family Residential | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	9
Gross write-offs year 2	0
Gross write-offs year 3	0
Gross write-offs year 4	0
Gross write-offs year 5	0
Gross write-offs year Prior	0
Gross write-offs year Revolving Loans	0
Gross write-offs Revolving Loans Converted to Term Loans	0
Gross write-offs Total	9
Consumer Lending | HELOCs
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	12,050	5,021
Year 2	6,383	5,957
Year 3	8,011	4,019
Year 4	3,275	3,326
Year 5	8,123	1,498
Prior	17,517	17,584
Revolving Loans	1,650,675	1,553,901
Revolving Loans Converted to Term Loans	105,594	130,898
Total	1,811,628	1,722,204
Gross write-offs Total	15	138	193
Consumer Lending | HELOCs | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	7,453	3,641
Year 2	3,288	3,882
Year 3	4,071	1,734
Year 4	3,236	3,153
Year 5	7,570	729
Prior	8,152	9,251
Revolving Loans	1,648,337	1,551,074
Revolving Loans Converted to Term Loans	99,488	126,280
Total	1,781,595	1,699,744
Consumer Lending | HELOCs | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	1,436	565
Year 2	0	1,219
Year 3	1,420	1,872
Year 4	0	101
Year 5	135	185
Prior	2,064	1,470
Revolving Loans	2,338	2,548
Revolving Loans Converted to Term Loans	594	1,089
Total	7,987	9,049
Consumer Lending | HELOCs | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	3,161	815
Year 2	3,095	856
Year 3	2,520	413
Year 4	39	72
Year 5	418	584
Prior	7,301	6,863
Revolving Loans	0	279
Revolving Loans Converted to Term Loans	5,512	3,529
Total	22,046	13,411
Consumer Lending | HELOCs | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	0	0
Gross write-offs year 2	10	0
Gross write-offs year 3	0	0
Gross write-offs year 4	0	0
Gross write-offs year 5	0	0
Gross write-offs year Prior	0	41
Gross write-offs year Revolving Loans	0	0
Gross write-offs Revolving Loans Converted to Term Loans	5	6
Gross write-offs Total	15	47
Consumer Lending | Total residential mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,379,615	3,200,997
Year 2	2,782,386	3,352,054
Year 3	3,085,358	2,288,289
Year 4	2,090,443	1,601,372
Year 5	1,419,106	987,313
Prior	2,473,897	1,990,440
Revolving Loans	1,650,675	1,553,901
Revolving Loans Converted to Term Loans	105,594	130,898
Total	15,987,074	15,105,264
Consumer Lending | Total residential mortgage | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	9	0
Gross write-offs year 2	10	0
Gross write-offs year 3	0	0
Gross write-offs year 4	0	0
Gross write-offs year 5	0	0
Gross write-offs year Prior	0	41
Gross write-offs year Revolving Loans	0	0
Gross write-offs Revolving Loans Converted to Term Loans	5	6
Gross write-offs Total	24	47
Consumer Lending | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	14,916	2,286
Year 2	0	18,098
Year 3	22,992	135
Year 4	132	0
Year 5	0	0
Prior	6,800	13,244
Revolving Loans	22,621	26,564
Revolving Loans Converted to Term Loans	0	0
Total	67,461	60,327
Gross write-offs Total	4,259	197	$ 106
Consumer Lending | Other consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	14,916	2,286
Year 2	0	18,098
Year 3	22,992	135
Year 4	132	0
Year 5	0	0
Prior	6,800	13,244
Revolving Loans	22,555	26,432
Revolving Loans Converted to Term Loans	0	0
Total	67,395	60,195
Consumer Lending | Other consumer | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	0	0
Revolving Loans	66	132
Revolving Loans Converted to Term Loans	0	0
Total	66	$ 132
Consumer Lending | Other consumer | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	0
Gross write-offs year 2	3,000
Gross write-offs year 3	0
Gross write-offs year 4	0
Gross write-offs year 5	0
Gross write-offs year Prior	0
Gross write-offs year Revolving Loans	890
Gross write-offs Revolving Loans Converted to Term Loans	0
Gross write-offs Total	$ 3,890

Loans Receivable and Allowanc_6

Loans Receivable and Allowance for Credit Losses - Schedule Of Aging Analysis Of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Nonaccrual and Past Due Loans
Loans held-for-investment	$ 53,726,637	$ 52,210,782
Current Accruing Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	53,462,858	51,984,909
Total Accruing Past Due Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	104,761	122,999
Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	55,354	88,791
Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	49,407	34,208
Total Nonaccrual Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	159,018	102,874
Commercial Lending
Nonaccrual and Past Due Loans
Loans held-for-investment	37,672,102	37,045,191
Commercial Lending | Current Accruing Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	37,537,266	36,927,223
Commercial Lending | Total Accruing Past Due Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	30,353	53,014
Commercial Lending | Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	11,025	44,117
Commercial Lending | Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	19,328	8,897
Commercial Lending | Total Nonaccrual Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	104,483	64,954
Commercial Lending | C&I
Nonaccrual and Past Due Loans
Loans held-for-investment	17,397,158	16,581,079
Commercial Lending | C&I | Current Accruing Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	17,288,138	16,508,394
Commercial Lending | C&I | Total Accruing Past Due Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	22,855	35,649
Commercial Lending | C&I | Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	5,690	28,550
Commercial Lending | C&I | Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	17,165	7,099
Commercial Lending | C&I | Total Nonaccrual Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	86,165	37,036
Commercial Lending | CRE
Nonaccrual and Past Due Loans
Loans held-for-investment	14,655,340	14,777,081
Commercial Lending | CRE | Current Accruing Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	14,647,270	14,750,315
Commercial Lending | CRE | Total Accruing Past Due Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	5,640	3,517
Commercial Lending | CRE | Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	3,755	1,719
Commercial Lending | CRE | Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	1,885	1,798
Commercial Lending | CRE | Total Nonaccrual Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	2,430	23,249
Commercial Lending | Multifamily Residential
Nonaccrual and Past Due Loans
Loans held-for-investment	4,953,442	5,023,163
Commercial Lending | Multifamily Residential | Current Accruing Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	4,947,939	5,017,897
Commercial Lending | Multifamily Residential | Total Accruing Past Due Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	931	597
Commercial Lending | Multifamily Residential | Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	653	597
Commercial Lending | Multifamily Residential | Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	278	0
Commercial Lending | Multifamily Residential | Total Nonaccrual Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	4,572	4,669
Commercial Lending | Construction and land
Nonaccrual and Past Due Loans
Loans held-for-investment	666,162	663,868
Commercial Lending | Construction and land | Current Accruing Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	653,919	650,617
Commercial Lending | Construction and land | Total Accruing Past Due Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	927	13,251
Commercial Lending | Construction and land | Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	927	13,251
Commercial Lending | Construction and land | Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	0	0
Commercial Lending | Construction and land | Total Nonaccrual Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	11,316	0
Commercial Lending | Total CRE
Nonaccrual and Past Due Loans
Loans held-for-investment	20,274,944	20,464,112
Commercial Lending | Total CRE | Current Accruing Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	20,249,128	20,418,829
Commercial Lending | Total CRE | Total Accruing Past Due Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	7,498	17,365
Commercial Lending | Total CRE | Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	5,335	15,567
Commercial Lending | Total CRE | Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	2,163	1,798
Commercial Lending | Total CRE | Total Nonaccrual Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	18,318	27,918
Consumer Lending
Nonaccrual and Past Due Loans
Loans held-for-investment	16,054,535	15,165,591
Consumer Lending | Current Accruing Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	15,925,592	15,057,686
Consumer Lending | Total Accruing Past Due Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	74,408	69,985
Consumer Lending | Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	44,329	44,674
Consumer Lending | Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	30,079	25,311
Consumer Lending | Total Nonaccrual Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	54,535	37,920
Consumer Lending | Single-Family Residential
Nonaccrual and Past Due Loans
Loans held-for-investment	14,175,446	13,383,060
Consumer Lending | Single-Family Residential | Current Accruing Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	14,088,086	13,313,455
Consumer Lending | Single-Family Residential | Total Accruing Past Due Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	54,937	45,228
Consumer Lending | Single-Family Residential | Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	32,841	29,285
Consumer Lending | Single-Family Residential | Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	22,096	15,943
Consumer Lending | Single-Family Residential | Total Nonaccrual Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	32,423	24,377
Consumer Lending | HELOCs
Nonaccrual and Past Due Loans
Loans held-for-investment	1,811,628	1,722,204
Consumer Lending | HELOCs | Current Accruing Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	1,770,218	1,687,301
Consumer Lending | HELOCs | Total Accruing Past Due Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	19,364	21,492
Consumer Lending | HELOCs | Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	11,396	12,266
Consumer Lending | HELOCs | Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	7,968	9,226
Consumer Lending | HELOCs | Total Nonaccrual Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	22,046	13,411
Consumer Lending | Total residential mortgage
Nonaccrual and Past Due Loans
Loans held-for-investment	15,987,074	15,105,264
Consumer Lending | Total residential mortgage | Current Accruing Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	15,858,304	15,000,756
Consumer Lending | Total residential mortgage | Total Accruing Past Due Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	74,301	66,720
Consumer Lending | Total residential mortgage | Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	44,237	41,551
Consumer Lending | Total residential mortgage | Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	30,064	25,169
Consumer Lending | Total residential mortgage | Total Nonaccrual Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	54,469	37,788
Consumer Lending | Other consumer
Nonaccrual and Past Due Loans
Loans held-for-investment	67,461	60,327
Consumer Lending | Other consumer | Current Accruing Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	67,288	56,930
Consumer Lending | Other consumer | Total Accruing Past Due Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	107	3,265
Consumer Lending | Other consumer | Accruing Loans 30-59 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	92	3,123
Consumer Lending | Other consumer | Accruing Loans 60-89 Days Past Due
Nonaccrual and Past Due Loans
Loans held-for-investment	15	142
Consumer Lending | Other consumer | Total Nonaccrual Loans
Nonaccrual and Past Due Loans
Loans held-for-investment	$ 66	$ 132

Loans Receivable and Allowanc_7

Loans Receivable and Allowance for Credit Losses - Schedule Of Amortized Cost Of Loans On Nonaccrual Status With No Related Allowance For Loan Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	$ 116,776	$ 72,085
Commercial Lending
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	95,117	59,977
Commercial Lending | C&I
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	79,591	33,089
Commercial Lending | CRE
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	0	22,653
Commercial Lending | Multifamily Residential
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	4,210	4,235
Commercial Lending | Construction and land
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	11,316	0
Consumer Lending
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	21,659	12,108
Consumer Lending | Single-Family Residential
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	6,279	4,852
Consumer Lending | HELOCs
Financing Receivable, Nonaccrual [Line Items]
Total nonaccrual loans with no related allowance for loan losses	$ 15,380	$ 7,256

Loans Receivable and Allowanc_8

Loans Receivable and Allowance for Credit Losses - Loans Receivable Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Foreclosed assets	$ 35	$ 11
Residential real estate properties
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Recorded investment in consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process	$ 16	$ 8

Loans Receivable and Allowanc_9

Loans Receivable and Allowance for Credit Losses - Schedule Of Modified Loans/TDRs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Loans Modified
Total	$ 206,411	$ 135,257	$ 39,112
Term Extension
Loans Modified
Total	143,360	76,643
Payment Delay
Loans Modified
Total	56,120	20,192
Combination: Term Extension/ Payment Delay
Loans Modified
Total	222	5,137
Combination: Rate Reduction/ Term Extension
Loans Modified
Total	6,052	32,470
Combination: Rate Reduction/ Payment Delay
Loans Modified
Total	657	815
Commercial Lending
Loans Modified
Total	175,832	115,955	38,415
Commercial Lending | Term Extension
Loans Modified
Total	143,360	76,643
Commercial Lending | Payment Delay
Loans Modified
Total	26,420	6,842
Commercial Lending | Combination: Term Extension/ Payment Delay
Loans Modified
Total	0	0
Commercial Lending | Combination: Rate Reduction/ Term Extension
Loans Modified
Total	6,052	32,470
Commercial Lending | Combination: Rate Reduction/ Payment Delay
Loans Modified
Total	0	0
Commercial Lending | C&I
Loans Modified
Total	$ 83,522	$ 69,546	38,415
Modification as a % of Loan Class	0.48%	0.42%
Commercial Lending | C&I | Term Extension
Loans Modified
Total	$ 57,102	$ 62,704
Commercial Lending | C&I | Payment Delay
Loans Modified
Total	26,420	6,842
Commercial Lending | C&I | Combination: Term Extension/ Payment Delay
Loans Modified
Total	0	0
Commercial Lending | C&I | Combination: Rate Reduction/ Term Extension
Loans Modified
Total	0	0
Commercial Lending | C&I | Combination: Rate Reduction/ Payment Delay
Loans Modified
Total	0	0
Commercial Lending | CRE
Loans Modified
Total	$ 92,310	$ 46,409
Modification as a % of Loan Class	0.63%	0.31%
Commercial Lending | CRE | Term Extension
Loans Modified
Total	$ 86,258	$ 13,939
Commercial Lending | CRE | Payment Delay
Loans Modified
Total	0	0
Commercial Lending | CRE | Combination: Term Extension/ Payment Delay
Loans Modified
Total	0	0
Commercial Lending | CRE | Combination: Rate Reduction/ Term Extension
Loans Modified
Total	6,052	32,470
Commercial Lending | CRE | Combination: Rate Reduction/ Payment Delay
Loans Modified
Total	0	0
Consumer Lending
Loans Modified
Total	30,579	19,302	697
Consumer Lending | Term Extension
Loans Modified
Total	0	0
Consumer Lending | Payment Delay
Loans Modified
Total	29,700	13,350
Consumer Lending | Combination: Term Extension/ Payment Delay
Loans Modified
Total	222	5,137
Consumer Lending | Combination: Rate Reduction/ Term Extension
Loans Modified
Total	0	0
Consumer Lending | Combination: Rate Reduction/ Payment Delay
Loans Modified
Total	657	815
Consumer Lending | Single-Family Residential
Loans Modified
Total	$ 15,759	$ 14,169
Modification as a % of Loan Class	0.11%	0.11%
Consumer Lending | Single-Family Residential | Term Extension
Loans Modified
Total	$ 0	$ 0
Consumer Lending | Single-Family Residential | Payment Delay
Loans Modified
Total	15,397	10,202
Consumer Lending | Single-Family Residential | Combination: Term Extension/ Payment Delay
Loans Modified
Total	222	3,967
Consumer Lending | Single-Family Residential | Combination: Rate Reduction/ Term Extension
Loans Modified
Total	0	0
Consumer Lending | Single-Family Residential | Combination: Rate Reduction/ Payment Delay
Loans Modified
Total	140	0
Consumer Lending | HELOCs
Loans Modified
Total	$ 14,820	$ 5,133	$ 697
Modification as a % of Loan Class	0.82%	0.30%
Consumer Lending | HELOCs | Term Extension
Loans Modified
Total	$ 0	$ 0
Consumer Lending | HELOCs | Payment Delay
Loans Modified
Total	14,303	3,148
Consumer Lending | HELOCs | Combination: Term Extension/ Payment Delay
Loans Modified
Total	0	1,170
Consumer Lending | HELOCs | Combination: Rate Reduction/ Term Extension
Loans Modified
Total	0	0
Consumer Lending | HELOCs | Combination: Rate Reduction/ Payment Delay
Loans Modified
Total	$ 517	$ 815

Loans Receivable and Allowan_10

Loans Receivable and Allowance for Credit Losses - Schedule Of Financial Effects of Loan Modifications (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Principal Forgiveness
Loans Modified
Principal Forgiveness		$ 371
Commercial Lending | C&I | Principal Forgiveness
Loans Modified
Principal Forgiveness		$ 371
Commercial Lending | C&I | Weighted-Average Interest Rate Reduction
Loans Modified
Weighted-Average Interest Rate Reduction	0%
Commercial Lending | C&I | Weighted-Average Term Extension (in years)
Loans Modified
Weighted average of loans (in years)	2 years 1 month 6 days	1 year 3 months 18 days
Commercial Lending | C&I | Weighted-Average Payment Delay (in years)
Loans Modified
Weighted average of loans (in years)	1 year 8 months 12 days	10 months 24 days
Commercial Lending | CRE | Weighted-Average Interest Rate Reduction
Loans Modified
Weighted-Average Interest Rate Reduction	1.28%	3%
Commercial Lending | CRE | Weighted-Average Term Extension (in years)
Loans Modified
Weighted average of loans (in years)	2 years 8 months 12 days	2 years 1 month 6 days
Consumer Lending | Single-Family Residential | Principal Forgiveness
Loans Modified
Principal Forgiveness		$ 0
Consumer Lending | Single-Family Residential | Weighted-Average Interest Rate Reduction
Loans Modified
Weighted-Average Interest Rate Reduction	1.63%	0%
Consumer Lending | Single-Family Residential | Weighted-Average Term Extension (in years)
Loans Modified
Weighted average of loans (in years)	10 years	9 years 3 months 18 days
Consumer Lending | Single-Family Residential | Weighted-Average Payment Delay (in years)
Loans Modified
Weighted average of loans (in years)	1 year 3 months 18 days	1 year 9 months 18 days
Consumer Lending | HELOCs | Principal Forgiveness
Loans Modified
Principal Forgiveness		$ 0
Consumer Lending | HELOCs | Weighted-Average Interest Rate Reduction
Loans Modified
Weighted-Average Interest Rate Reduction	0.25%	0.11%
Consumer Lending | HELOCs | Weighted-Average Term Extension (in years)
Loans Modified
Weighted average of loans (in years)		14 years 2 months 12 days
Consumer Lending | HELOCs | Weighted-Average Payment Delay (in years)
Loans Modified
Weighted average of loans (in years)	1 year 8 months 12 days	4 years 7 months 6 days

Loans Receivable and Allowan_11

Loans Receivable and Allowance for Credit Losses - Schedule Of Loans Modification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	$ 26,654	$ 1,016
Term Extension
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	3,684	0
Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	19,850	1,016
Combination: Rate Reduction/ Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	658	0
Combination: Term Extension/ Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	2,462	0
Commercial lending
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	8,621
Commercial lending | Term Extension
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	3,684
Commercial lending | Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	4,937
Commercial lending | Combination: Rate Reduction/ Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	0
Commercial lending | Combination: Term Extension/ Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	0
Commercial lending | C&I
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	8,621
Commercial lending | C&I | Term Extension
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	3,684
Commercial lending | C&I | Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	4,937
Commercial lending | C&I | Combination: Rate Reduction/ Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	0
Commercial lending | C&I | Combination: Term Extension/ Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	0
Consumer Lending
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	18,033	1,016
Consumer Lending | Term Extension
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	0	0
Consumer Lending | Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	14,913	1,016
Consumer Lending | Combination: Rate Reduction/ Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	658	0
Consumer Lending | Combination: Term Extension/ Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	2,462	0
Consumer Lending | Single-Family Residential
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	12,826	267
Consumer Lending | Single-Family Residential | Term Extension
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	0	0
Consumer Lending | Single-Family Residential | Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	10,223	267
Consumer Lending | Single-Family Residential | Combination: Rate Reduction/ Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	141	0
Consumer Lending | Single-Family Residential | Combination: Term Extension/ Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	2,462	0
Consumer Lending | HELOCs
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	5,207	749
Consumer Lending | HELOCs | Term Extension
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	0	0
Consumer Lending | HELOCs | Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	4,690	749
Consumer Lending | HELOCs | Combination: Rate Reduction/ Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	517	0
Consumer Lending | HELOCs | Combination: Term Extension/ Payment Delay
Financing Receivable, Modified [Line Items]
Financing receivable, modified, subsequent default	$ 0	$ 0

Loans Receivable and Allowan_12

Loans Receivable and Allowance for Credit Losses - Schedule of Financing Receivable, Modified, Payment Performance (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	$ 206,411	$ 135,257
Commitment to lend	10,000	4,000	$ 16,000
Current Accruing Loans
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	181,307	113,900
30-89 Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	19,485	10,755
90+ Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	5,619	10,602
Commercial lending
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	175,832	115,955
Commercial lending | Current Accruing Loans
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	163,634	98,496
Commercial lending | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	12,198	8,153
Commercial lending | 90+ Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	0	9,306
Commercial lending | C&I
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	83,522	69,546
Commercial lending | C&I | Current Accruing Loans
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	71,324	52,087
Commercial lending | C&I | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	12,198	8,153
Commercial lending | C&I | 90+ Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	0	9,306
Commercial lending | CRE
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	92,310	46,409
Commercial lending | CRE | Current Accruing Loans
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	92,310	46,409
Commercial lending | CRE | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	0	0
Commercial lending | CRE | 90+ Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	0	0
Consumer Lending
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	30,579	19,302
Consumer Lending | Current Accruing Loans
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	17,673	15,404
Consumer Lending | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	7,287	2,602
Consumer Lending | 90+ Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	5,619	1,296
Consumer Lending | Single-Family Residential
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	15,759	14,169
Consumer Lending | Single-Family Residential | Current Accruing Loans
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	9,082	11,197
Consumer Lending | Single-Family Residential | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	4,218	2,425
Consumer Lending | Single-Family Residential | 90+ Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	2,459	547
Consumer Lending | HELOCs
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	14,820	5,133
Consumer Lending | HELOCs | Current Accruing Loans
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	8,591	4,207
Consumer Lending | HELOCs | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	3,069	177
Consumer Lending | HELOCs | 90+ Days Past Due
Financing Receivable, Allowance for Credit Losses
Financing receivable, modified, accumulated	$ 3,160	$ 749

Loans Receivable and Allowan_13

Loans Receivable and Allowance for Credit Losses - Additions to TDRs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) loan
Financing Receivable, Modified [Line Items]
Number of Loans | loan			9
Pre-Modification Outstanding Recorded Investment			$ 69,712
Post-modification outstanding recorded investment	$ 206,411	$ 135,257	39,112
Financing Impact			$ 12,640
Commercial Lending
Financing Receivable, Modified [Line Items]
Number of Loans | loan			7
Pre-Modification Outstanding Recorded Investment			$ 69,050
Post-modification outstanding recorded investment	175,832	115,955	38,415
Financing Impact			$ 12,638
Commercial Lending | C&I
Financing Receivable, Modified [Line Items]
Number of Loans | loan			7
Pre-Modification Outstanding Recorded Investment			$ 69,050
Post-modification outstanding recorded investment	83,522	69,546	38,415
Financing Impact			$ 12,638
Consumer Lending
Financing Receivable, Modified [Line Items]
Number of Loans | loan			2
Pre-Modification Outstanding Recorded Investment			$ 662
Post-modification outstanding recorded investment	30,579	19,302	697
Financing Impact			$ 2
Consumer Lending | HELOCs
Financing Receivable, Modified [Line Items]
Number of Loans | loan			2
Pre-Modification Outstanding Recorded Investment			$ 662
Post-modification outstanding recorded investment	$ 14,820	$ 5,133	697
Financing Impact			$ 2

Loans Receivable and Allowan_14

Loans Receivable and Allowance for Credit Losses - TDR Post-Modifications (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment	$ 206,411	$ 135,257	$ 39,112
Principal
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment			24,935
Other
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment			14,177
Commercial Lending
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment	175,832	115,955	38,415
Commercial Lending | Principal
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment			24,238
Commercial Lending | Other
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment			14,177
Commercial Lending | C&I
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment	83,522	69,546	38,415
Commercial Lending | C&I | Principal
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment			24,238
Commercial Lending | C&I | Other
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment			14,177
Consumer Lending
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment	30,579	19,302	697
Consumer Lending | Principal
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment			697
Consumer Lending | Other
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment			0
Consumer Lending | HELOCs
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment	$ 14,820	$ 5,133	697
Consumer Lending | HELOCs | Principal
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment			697
Consumer Lending | HELOCs | Other
Financing Receivable, Modified [Line Items]
Post-modification outstanding recorded investment			$ 0

Loans Receivable and Allowan_15

Loans Receivable and Allowance for Credit Losses - Loans Modified as TDRs that Subsequently Defaulted (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) loan	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Financing Receivable, Modified [Line Items]
Number of Loans | loan	2
Recorded Investment	$ 10,296
Commitment to lend	$ 16,000	$ 10,000	$ 4,000
Commercial Lending
Financing Receivable, Modified [Line Items]
Number of Loans | loan	2
Recorded Investment	$ 10,296
Commercial Lending | C&I
Financing Receivable, Modified [Line Items]
Number of Loans | loan	2
Recorded Investment	$ 10,296

Loans Receivable and Allowan_16

Loans Receivable and Allowance for Credit Losses - Allowance for Credit Losses Narrative (Details) $ in Millions	Dec. 31, 2024 USD ($) quarter	Dec. 31, 2023 USD ($)	Sep. 30, 2023 qtr	Jun. 30, 2023 qtr
Financing Receivable, Allowance for Credit Losses
Life time loss rate, period span | quarter	8
Financing receivable and off balance sheet credit loss allowance	$ 742	$ 706
Commercial lending
Financing Receivable, Allowance for Credit Losses
Collateral dependent loans	45	30
Consumer Lending
Financing Receivable, Allowance for Credit Losses
Collateral dependent loans	$ 23	$ 12
C&I
Financing Receivable, Allowance for Credit Losses
Life time loss rate, period span | qtr			8	11

Loans Receivable and Allowan_17

Loans Receivable and Allowance for Credit Losses - Schedule Of Activity In The Allowance For Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Allowance for loan losses
Allowance for loan losses, start of period	$ 668,743	$ 595,645	$ 541,579
Provision for (reversal of) credit losses on loans	172,176	113,571	74,767
Gross charge-offs	(146,257)	(54,372)	(37,920)
Gross recoveries	7,639	8,118	19,461
Total net (charge-offs) recoveries	(138,618)	(46,254)	(18,459)
Foreign currency translation adjustments	(249)	(247)	(2,242)
Allowance for loan losses, end of period	702,052	668,743	595,645
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2022-02
Allowance for loan losses
Allowance for loan losses, start of period		6,028
Allowance for loan losses, end of period			6,028
Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses
Allowance for loan losses, start of period		601,673
Allowance for loan losses, end of period			601,673
Commercial Lending | C&I
Allowance for loan losses
Allowance for loan losses, start of period	392,685	371,700	338,252
Provision for (reversal of) credit losses on loans	110,791	45,319	37,604
Gross charge-offs	(125,413)	(36,573)	(18,738)
Gross recoveries	6,505	6,803	16,824
Total net (charge-offs) recoveries	(118,908)	(29,770)	(1,914)
Foreign currency translation adjustments	(249)	(247)	(2,242)
Allowance for loan losses, end of period	384,319	392,685	371,700
Commercial Lending | C&I | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2022-02
Allowance for loan losses
Allowance for loan losses, start of period		5,683
Allowance for loan losses, end of period			5,683
Commercial Lending | C&I | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses
Allowance for loan losses, start of period		377,383
Allowance for loan losses, end of period			377,383
Commercial Lending | CRE
Allowance for loan losses
Allowance for loan losses, start of period	170,592	149,864	150,940
Provision for (reversal of) credit losses on loans	61,908	27,007	8,212
Gross charge-offs	(14,236)	(7,048)	(10,871)
Gross recoveries	413	432	1,583
Total net (charge-offs) recoveries	(13,823)	(6,616)	(9,288)
Foreign currency translation adjustments	0	0	0
Allowance for loan losses, end of period	218,677	170,592	149,864
Commercial Lending | CRE | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2022-02
Allowance for loan losses
Allowance for loan losses, start of period		337
Allowance for loan losses, end of period			337
Commercial Lending | CRE | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses
Allowance for loan losses, start of period		150,201
Allowance for loan losses, end of period			150,201
Commercial Lending | Multifamily Residential
Allowance for loan losses
Allowance for loan losses, start of period	34,375	23,373	14,400
Provision for (reversal of) credit losses on loans	(2,684)	10,454	15,651
Gross charge-offs	(10)	(3)	(7,237)
Gross recoveries	436	545	559
Total net (charge-offs) recoveries	426	542	(6,678)
Foreign currency translation adjustments	0	0	0
Allowance for loan losses, end of period	32,117	34,375	23,373
Commercial Lending | Multifamily Residential | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2022-02
Allowance for loan losses
Allowance for loan losses, start of period		6
Allowance for loan losses, end of period			6
Commercial Lending | Multifamily Residential | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses
Allowance for loan losses, start of period		23,379
Allowance for loan losses, end of period			23,379
Commercial Lending | Construction and land
Allowance for loan losses
Allowance for loan losses, start of period	10,469	9,109	15,468
Provision for (reversal of) credit losses on loans	9,114	11,537	(6,433)
Gross charge-offs	(2,289)	(10,413)	0
Gross recoveries	203	236	74
Total net (charge-offs) recoveries	(2,086)	(10,177)	74
Foreign currency translation adjustments	0	0	0
Allowance for loan losses, end of period	17,497	10,469	9,109
Commercial Lending | Construction and land | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2022-02
Allowance for loan losses
Allowance for loan losses, start of period		0
Allowance for loan losses, end of period			0
Commercial Lending | Construction and land | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses
Allowance for loan losses, start of period		9,109
Allowance for loan losses, end of period			9,109
Consumer Lending | Single-Family Residential
Allowance for loan losses
Allowance for loan losses, start of period	55,018	35,564	17,160
Provision for (reversal of) credit losses on loans	(10,176)	19,384	18,867
Gross charge-offs	(35)	0	(775)
Gross recoveries	9	69	312
Total net (charge-offs) recoveries	(26)	69	(463)
Foreign currency translation adjustments	0	0	0
Allowance for loan losses, end of period	44,816	55,018	35,564
Consumer Lending | Single-Family Residential | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2022-02
Allowance for loan losses
Allowance for loan losses, start of period		1
Allowance for loan losses, end of period			1
Consumer Lending | Single-Family Residential | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses
Allowance for loan losses, start of period		35,565
Allowance for loan losses, end of period			35,565
Consumer Lending | HELOCs
Allowance for loan losses
Allowance for loan losses, start of period	3,947	4,475	3,435
Provision for (reversal of) credit losses on loans	(873)	(424)	1,124
Gross charge-offs	(15)	(138)	(193)
Gross recoveries	73	33	109
Total net (charge-offs) recoveries	58	(105)	(84)
Foreign currency translation adjustments	0	0	0
Allowance for loan losses, end of period	3,132	3,947	4,475
Consumer Lending | HELOCs | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2022-02
Allowance for loan losses
Allowance for loan losses, start of period		1
Allowance for loan losses, end of period			1
Consumer Lending | HELOCs | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses
Allowance for loan losses, start of period		4,476
Allowance for loan losses, end of period			4,476
Consumer Lending | Other consumer
Allowance for loan losses
Allowance for loan losses, start of period	1,657	1,560	1,924
Provision for (reversal of) credit losses on loans	4,096	294	(258)
Gross charge-offs	(4,259)	(197)	(106)
Gross recoveries	0	0	0
Total net (charge-offs) recoveries	(4,259)	(197)	(106)
Foreign currency translation adjustments	0	0	0
Allowance for loan losses, end of period	$ 1,494	1,657	1,560
Consumer Lending | Other consumer | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2022-02
Allowance for loan losses
Allowance for loan losses, start of period		0
Allowance for loan losses, end of period			0
Consumer Lending | Other consumer | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses
Allowance for loan losses, start of period		$ 1,560
Allowance for loan losses, end of period			$ 1,560

Loans Receivable and Allowan_18

Loans Receivable and Allowance for Credit Losses - Schedule of Activities in Allowance for loan losses by Portfolio Segments and Unfunded Credit Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Allowance for unfunded credit reserves
Allowance for unfunded credit commitments, beginning of period	$ 38,000
Foreign currency translation adjustments	(249)	$ (247)	$ (2,242)
Allowance for unfunded credit commitments, end of period	39,000	38,000
Provision for credit losses	174,000	125,000	73,500
Unfunded Credit Commitments
Allowance for unfunded credit reserves
Allowance for unfunded credit commitments, beginning of period	37,699	26,264	27,514
Provision for (reversal of) credit losses on unfunded credit commitments	1,824	11,429	(1,267)
Foreign currency translation adjustments	3	6	17
Allowance for unfunded credit commitments, end of period	$ 39,526	$ 37,699	$ 26,264

Loans Receivable and Allowan_19

Loans Receivable and Allowance for Credit Losses - Schedule Of Carrying Value Of Loans Transferred, Loans Sold and Purchased For the Held-For-Investment Portfolio (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Loans Receivable and Allowance for Credit Losses
Loans transferred from held-for-investment to held-for-sale	$ 659,322	$ 739,379	$ 623,777
Loans transferred from held-for-sale to held-for-investment			631
Sales	663,388	769,822	595,767
Purchases	999,993	599,775	657,270
Write-offs of allowance for loan losses related to loans transferred to held-for-sale	2,000	5,000	3,000
Originated
Loans Receivable and Allowance for Credit Losses
Sales	508,000	513,000	388,000
Loans sold in secondary market | Purchased
Loans Receivable and Allowance for Credit Losses
Sales	156,000	256,000	208,000
Commercial Lending | C&I
Loans Receivable and Allowance for Credit Losses
Loans transferred from held-for-investment to held-for-sale	649,187	647,943	530,524
Loans transferred from held-for-sale to held-for-investment			0
Sales	650,256	674,919	501,289
Purchases	612,364	106,493	363,549
Commercial Lending | CRE
Loans Receivable and Allowance for Credit Losses
Loans transferred from held-for-investment to held-for-sale	9,417	83,282	88,075
Loans transferred from held-for-sale to held-for-investment			0
Sales	9,417	86,749	88,075
Purchases	0	0	0
Commercial Lending | Construction and land
Loans Receivable and Allowance for Credit Losses
Loans transferred from held-for-investment to held-for-sale	718	8,154	0
Loans transferred from held-for-sale to held-for-investment			0
Sales	718	8,154	0
Purchases	0	0	0
Consumer Lending | Single-Family Residential
Loans Receivable and Allowance for Credit Losses
Loans transferred from held-for-investment to held-for-sale	0	0	5,178
Loans transferred from held-for-sale to held-for-investment			631
Sales	2,997	0	6,403
Purchases	$ 387,629	$ 493,282	$ 293,721

Affordable Housing Partnershi_3

Affordable Housing Partnership, Tax Credit and Community Reinvestment Act Investments, Net - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Investments in Tax Credit and Other Investments, Net [Line Items]
Minimum compliance period for qualified affordable housing partnerships to fully utilize the tax credits (in years)	15 years
Other Assets and Affordable Housing Partnership, Tax Credit and CRA Investments, Net
Investments in Tax Credit and Other Investments, Net [Line Items]
Equity securities without readily determinable fair value	$ 147	$ 146

Affordable Housing Partnershi_4

Affordable Housing Partnership, Tax Credit and Community Reinvestment Act Investments, Net - Schedule of Affordable Housing, Tax Credit and CRA Investments, Net and Related Unfunded Commitments (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Assets
Tax credits and CRA investments	$ 265,994	$ 485,251
Total affordable housing partnership, tax credit and CRA investments, net	926,640	905,036
Liabilities - Unfunded Commitments
Tax credits and CRA investments	105,743	298,990
Equity method of accounting and other:	407,864	550,736
Affordable housing partnership investments
Assets
PAM - Affordable housing partnership investments	500,217	419,785
Liabilities - Unfunded Commitments
PAM - Affordable housing partnership investments	280,919	251,746
Tax credit and CRA investments
Assets
PAM - Affordable housing partnership investments	160,429	0
Liabilities - Unfunded Commitments
PAM - Affordable housing partnership investments	$ 21,202	$ 0

Affordable Housing Partnershi_5

Affordable Housing Partnership, Tax Credit and Community Reinvestment Act Investments, Net - Schedule of Additional Information related to the Affordable Housing, Tax Credit and CRA Investments, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Equity method of accounting and other:
Tax credit and CRA investments	$ 64,720	$ 124,433	$ 116,132
Total tax credits and benefits	245,315	185,372	168,264
Equity method of accounting and other:
Tax credit and CRA Investments	54,242	120,299	113,358
Total amortization	$ 190,468	$ 163,340	$ 152,117
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Income or Comprehensive Income [Extensible Enumeration]	Income tax expense	Income tax expense	Income tax expense
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration]	Income tax expense	Income tax expense	Income tax expense
Investment Program Proportional Amortization Method Elected Income Tax Credit And Other Income Tax Benefit Before Amortization Statement Of CashFlows Extensible Enumeration Not Disclosed Flag	Tax credit and CRA investments
Investment Program Proportional Amortization Method Applied Income Tax Credit And Other Tax Benefit Amortization Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag	Tax credit and CRA investments (3)
Historic Tax Credit Investment
Equity method of accounting and other:
Pre-tax impairment (charge) recovery	$ (1,000)	$ 1,000	$ 469
Affordable housing partnership investments
Tax credits and benefits
PAM - Affordable housing partnership investments	70,335	60,939	52,132
Amortization:
PAM - Affordable housing partnership investments	46,113	43,041	38,759
Tax credit and CRA investments
Tax credits and benefits
PAM - Affordable housing partnership investments	110,260	0	0
Amortization:
PAM - Affordable housing partnership investments	$ 90,113	$ 0	$ 0

Affordable Housing Partnershi_6

Affordable Housing Partnership, Tax Credit and Community Reinvestment Act Investments, Net - Schedule of Unfunded Commitments Related to Investments (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Unfunded commitments related to investments in qualified affordable housing partnerships, tax credit and other investments
2025	$ 304,008
2026	85,995
2027	9,434
2028	1,643
2029	1,306
Thereafter	5,478
Total	$ 407,864

Goodwill (Details)

Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Line Items]
Goodwill	$ 465,697,000	$ 465,697,000
Goodwill, impairment loss	0
Rayliant Global Advisors Limited
Goodwill [Line Items]
Equity securities without readily determinable fair value	108,000,000
Equity method investment, difference between carrying amount and underlying equity	$ 101,000,000

Deposits - Schedule of Balances

Deposits - Schedule of Balances for Core Deposits and Time Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deposits
Noninterest-bearing demand	$ 15,450,428	$ 15,539,872
Interest-bearing checking	7,940,692	7,558,908
Money market	14,816,511	13,108,727
Time deposits	23,215,772
Total deposits	63,175,023	56,092,438
Time deposits, at or above FDIC insurance limit	16,500,000	13,600,000
Domestic office
Deposits
Savings:	1,583,657	1,638,916
Time deposits	21,128,657	16,037,287
Foreign office
Deposits
Savings:	167,963	202,551
Time deposits	$ 2,087,115	$ 2,006,177

Deposits - Scheduled Maturities

Deposits - Scheduled Maturities of Time Deposits (Details) $ in Thousands	Dec. 31, 2024 USD ($)
DEPOSIT ACCOUNTS
2025	$ 22,590,146
2026	270,237
2027	299,214
2028	53,109
2029	3,066
Time deposits	$ 23,215,772

Short-Term Borrowings and Lon_3

Short-Term Borrowings and Long-Term Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Short-Term Debt [Line Items]
Total FHLB advances	$ 3,500,000	$ 0
Weighted-average contractual interest rates for FHLB advances	4.48%
Floating
Short-Term Debt [Line Items]
Total FHLB advances	$ 3,000,000	0
Fixed
Short-Term Debt [Line Items]
Total FHLB advances	$ 500,000	$ 0
Minimum | Floating
Short-Term Debt [Line Items]
Interest Rate	4.56%
Minimum | Fixed
Short-Term Debt [Line Items]
Interest Rate	3.87%
Maximum | Floating
Short-Term Debt [Line Items]
Interest Rate	4.61%
Maximum | Fixed
Short-Term Debt [Line Items]
Interest Rate	3.95%
Bank Term Funding Program
Short-Term Debt [Line Items]
Interest rate short-term borrowings		4.37%
Short-term borrowings	$ 0	$ 4,500,000
Junior subordinated debt
Short-Term Debt [Line Items]
Long-term debt total	$ 35,000
Junior subordinated debt | MCBI Statutory Trust I
Short-Term Debt [Line Items]
Debt instrument, basis spread on variable rate	1.81%
Parent company | Junior subordinated debt
Short-Term Debt [Line Items]
Weighted-average rate (as a percent)	6.17%	6.87%
Long-term debt total	$ 32,001	$ 148,249

Short-Term Borrowings and Lon_4

Short-Term Borrowings and Long-Term Debt - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) trust	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
FHLB advances borrowing capacity		$ 9,900,000
FHLB advances		$ 3,500,000	$ 0
Junior subordinated debt
Debt Instrument [Line Items]
Number of statutory business trusts formed for the purpose of issuing junior subordinated debt to third party investors | trust		1
Repayments of subordinated debt	$ 117,000
Junior subordinated debenture owed to unconsolidated subsidiary trust		$ 35,000
Trust preferred securities		$ 1,000

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Income Tax Expense/Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current income tax expense:
Federal	$ 166,268	$ 172,428	$ 163,797
State	153,891	173,080	160,629
Foreign	10,399	2,240	3,133
Total current income tax expense	330,558	347,748	327,559
Deferred income tax (benefit) expense:
Federal	(6,467)	(24,319)	(23,484)
State	(5,582)	(23,415)	(21,835)
Foreign	(2,234)	(1,405)	1,331
Total deferred income tax benefit	(14,283)	(49,139)	(43,988)
Income tax expense	$ 316,275	$ 298,609	$ 283,571

Income Taxes - Schedule of Reco

Income Taxes - Schedule of Reconciliation of Federal Statutory Rate (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Difference between the effective tax rate implicit in the consolidated financial statements and the statutory federal income tax rate
Statutory U.S. federal tax rate	21%	21%	21%
U.S. state income taxes, net of U.S. federal income tax effect	7.70%	8.10%	7.80%
Tax credits and benefits, net of amortization	(7.40%)	(9.90%)	(8.90%)
Other, net	0%	1.30%	0.20%
Effective tax rate	21.30%	20.50%	20.10%

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Allowance for credit losses and nonperforming assets valuation allowance	$ 233,879	$ 217,731
Net unrealized losses on AFS debt and transferred securities	223,814	246,835
Stock compensation and other accrued compensation	41,118	33,169
Lease liabilities	27,644	32,636
FDIC special assessment charge	16,843	22,212
Basis difference in investments	17,708	28,216
State capital loss and tax credit carryforwards	11,122	266
Nonaccrual loans’ interest income	8,809	7,034
State taxes	5,808	9,885
Other	14,665	10,535
Total deferred tax assets	601,410	608,519
Deferred tax liabilities:
Operating lease right-of-use assets	25,647	30,272
Basis difference in investments	25,587	23,103
Equipment lease financing	10,395	15,564
Prepaid expenses	2,319	2,981
FHLB stock dividends	1,961	1,947
Mortgage servicing assets	1,678	2,102
Other	20,479	13,801
Total deferred tax liabilities	88,066	89,770
Net deferred tax assets	513,344	$ 518,749
State and Local Jurisdiction
Valuation Allowance [Line Items]
Deferred tax assets, capital loss carryforwards	8,000
Deferred tax assets, tax credit carryforwards	$ 3,000

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Valuation allowance	$ 0	$ 0
Net interest expense/penalties related to unrecognized tax benefits	1,000,000	0	$ 0
Interest and penalties accrued	$ 1,000,000	$ 0

Income Taxes - Schedule of Unre

Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Activity related to unrecognized tax benefits
Beginning balance	$ 1,193	$ 477	$ 5,045
Additions for tax positions related to prior years	2,698	459	0
Additions for tax positions related to current year	779	257	0
Settlements with taxing authorities	0	0	(4,568)
Ending balance	$ 4,670	$ 1,193	$ 477

Commitments and Contingencies -

Commitments and Contingencies - Schedule of Credit-Related Commitments (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Commitments to Extend Credit
Expire in One Year or Less	$ 304,008
Expire After Five Years	5,478
Total	407,864
Loan commitments
Commitments to Extend Credit
Expire in One Year or Less	4,741,319
Expire After One Year Through Three Years	3,640,167
Expire After Three Years Through Five Years	661,403
Expire After Five Years	85,151
Total	9,128,040	$ 9,141,447
Commercial letters of credit and SBLCs
Commitments to Extend Credit
Expire in One Year or Less	1,152,114
Expire After One Year Through Three Years	465,073
Expire After Three Years Through Five Years	194,483
Expire After Five Years	1,105,359
Total	2,917,029	2,610,761
Commitments to Extend Credit
Commitments to Extend Credit
Expire in One Year or Less	5,893,433
Expire After One Year Through Three Years	4,105,240
Expire After Three Years Through Five Years	855,886
Expire After Five Years	1,190,510
Total	$ 12,045,069	$ 11,752,208

Commitments and Contingencies_2

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Commitments to Extend Credit
Letters of credit	$ 2,900,000	$ 2,600,000
Allowance for unfunded credit commitments	39,000	38,000
Loans Sold or Securitized With Recourse | Single Family and Multi-family Residential Loans | Loans Sold or Securitized with Recourse
Commitments to Extend Credit
Allowance for unfunded credit commitments	34	40
Standby Letters of Credit
Commitments to Extend Credit
Letters of credit	2,900,000	2,600,000
Commercial Letters of Credit
Commitments to Extend Credit
Letters of credit	$ 29,000	$ 24,000

Commitments and Contingencies_3

Commitments and Contingencies - Schedule of Guarantees Outstanding (Details) - Loans Sold or Securitized With Recourse - Loans Sold or Securitized with Recourse - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Guarantor obligation, maximum potential future payment [Abstract]
Expire in One Year or Less	$ 10
Expire After One Year Through Three Years	0
Expire After Three Years Through Five Years	185
Expire After Five Years	19,176
Total	19,371	$ 20,884
Carrying value	22,145	24,908
Single Family Residential
Guarantor obligation, maximum potential future payment [Abstract]
Expire in One Year or Less	10
Expire After One Year Through Three Years	0
Expire After Three Years Through Five Years	40
Expire After Five Years	4,325
Total	4,375	5,888
Carrying value	4,375	5,888
Multifamily residential
Guarantor obligation, maximum potential future payment [Abstract]
Expire in One Year or Less	0
Expire After One Year Through Three Years	0
Expire After Three Years Through Five Years	145
Expire After Five Years	14,851
Total	14,996	14,996
Carrying value	$ 17,770	$ 19,020

Stock Compensation Plans - Narr

Stock Compensation Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
RSUs | Cliff
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Performance-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value of awards granted (in dollars per share)	$ 80.28	$ 79.93	$ 77.91
Total fair value of awards that vested	$ 12	$ 21	$ 18
Total unrecognized stock compensation expense	$ 16
Weighted average period to recognize unrecognized compensation cost	1 year 1 month 17 days
Performance-Based RSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target award available for grant	0%
Performance-Based RSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target award available for grant	200%
Performance-Based RSUs | Cliff
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Time-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value of awards granted (in dollars per share)	$ 76.44	$ 73.13	$ 78.15
Total fair value of awards that vested	$ 25	$ 39	$ 30
Total unrecognized stock compensation expense	$ 34
Weighted average period to recognize unrecognized compensation cost	1 year 9 months 14 days
2021 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares outstanding other than RSUs (in shares)	0	0	0
Common stock, shares authorized (in shares)	17,000,000
Shares available (in shares)	4,000,000

Stock Compensation Plans - Sche

Stock Compensation Plans - Schedule of Stock Compensation Expense and Related Net Tax (Deficiency) Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Stock compensation costs	$ 45,535	$ 39,867	$ 37,601
Related net tax benefits for stock compensation plans	$ 997	$ 8,959	$ 5,293

Stock Compensation Plans - Sc_2

Stock Compensation Plans - Schedule of Activity for Time-Based and Performance-Based Restricted Stock Units (Details) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Time-Based RSUs
Shares
Outstanding at beginning of year (in shares)	1,206,518
Granted (in shares)	553,398
Vested (in shares)	(329,468)
Forfeited (in shares)	(81,836)
Outstanding at end of year (in shares)	1,348,612	1,206,518
Weighted-Average Grant Date Fair Value
Outstanding at end of year (in dollars per share)	$ 74.29
Granted (in dollars per share)	76.44	$ 73.13	$ 78.15
Vested (in dollars per share)	72.05
Forfeited (in dollars per share)	74.53
Outstanding at end of year (in dollars per share)	$ 75.70	$ 74.29
Performance-Based RSUs
Shares
Outstanding at beginning of year (in shares)	276,223
Granted (in shares)	97,798
Vested (in shares)	(91,960)
Forfeited (in shares)	0
Outstanding at end of year (in shares)	282,061	276,223
Weighted-Average Grant Date Fair Value
Outstanding at end of year (in dollars per share)	$ 78.59
Granted (in dollars per share)	80.28	$ 79.93	$ 77.91
Vested (in dollars per share)	77.67
Forfeited (in dollars per share)	0
Outstanding at end of year (in dollars per share)	$ 79.48	$ 78.59

Stock Compensation Plans - Stoc

Stock Compensation Plans - Stock Purchase Plan (Details) - Stock Purchase Plan - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Stock purchase plan
Purchase price of shares in terms compared to market price per share (as a percent)	90%
Annual purchase limitation per employee (in dollars per employee)	$ 22,500
Compensation expense	$ 0
Common stock, shares authorized (in shares)	2,000,000
Shares sold to employees (in shares)	41,563	65,971
Value of shares sold to employees under purchase plan	$ 3,000,000	$ 3,000,000
Shares available (in shares)	110,251

Stockholders' Equity and Earn_3

Stockholders' Equity and Earnings Per Share - Schedule of Earnings Per Share Calculations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Basic:
Net income	$ 1,165,586	$ 1,161,161	$ 1,128,083
Weighted-average number of shares outstanding (in shares)	138,898	141,164	141,326
Basic EPS (in dollars per share)	$ 8.39	$ 8.23	$ 7.98
Diluted:
Net income	$ 1,165,586	$ 1,161,161	$ 1,128,083
Weighted-average number of shares outstanding (in shares)	138,898	141,164	141,326
Add: Dilutive impact of unvested RSUs (in shares)	1,060	738	1,166
Diluted weighted-average number of shares outstanding (in shares)	139,958	141,902	142,492
Diluted EPS (in dollars per share)	$ 8.33	$ 8.18	$ 7.92

Stockholders' Equity and Earn_4

Stockholders' Equity and Earnings Per Share - Narrative (Details) - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2020
Stockholders' Equity and Earnings Per Share [Line Items]
Stock repurchase program, amount authorized				$ 500
RSUs
Stockholders' Equity and Earnings Per Share [Line Items]
Weighted-average anti-dilutive shares (in shares)	6	283	3

Stockholders' Equity and Earn_5

Stockholders' Equity and Earnings Per Share - Schedule of Common Share Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Stockholders' Equity and Earnings Per Share [Abstract]
Shares repurchased (in shares)	1,943,346	1,506,091	1,385,517
Average price (in dollars per share)	$ 74.33	$ 54.56	$ 72.17
Total Cost	$ 144,446	$ 82,174	$ 99,990

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive (Loss) Income - Schedule Of The Changes In Components Of Accumulated Other Comprehensive Income (Loss) Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 6,950,834	$ 5,984,612	$ 5,837,218
Other comprehensive income (loss)	35,336	145,033	(675,248)
Ending balance	7,723,054	6,950,834	5,984,612
Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(601,881)	(694,815)	(85,703)
Net unrealized gains (losses) arising during the period	50,302	76,930	(620,870)
Amounts reclassified from AOCI	9,427	16,004	11,758
Other comprehensive income (loss)	59,729	92,934	(609,112)
Ending balance	(542,152)	(601,881)	(694,815)
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	2,624	(49,531)	257
Net unrealized gains (losses) arising during the period	(87,447)	(4,277)	(52,623)
Amounts reclassified from AOCI	64,036	56,432	2,835
Other comprehensive income (loss)	(23,411)	52,155	(49,788)
Ending balance	(20,787)	2,624	(49,531)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(21,339)	(21,283)	(4,935)
Net unrealized gains (losses) arising during the period	(982)	(56)	(16,348)
Amounts reclassified from AOCI	0	0	0
Other comprehensive income (loss)	(982)	(56)	(16,348)
Ending balance	(22,321)	(21,339)	(21,283)
AOCI, Net of Tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(620,596)	(765,629)	(90,381)
Net unrealized gains (losses) arising during the period	(38,127)	72,597	(689,841)
Amounts reclassified from AOCI	73,463	72,436	14,593
Other comprehensive income (loss)	35,336	145,033	(675,248)
Ending balance	$ (585,260)	$ (620,596)	$ (765,629)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive (Loss) Income - Schedule Of Components Of Other Comprehensive Income (Loss), Reclassifications To Net Income And The Related Tax Effects (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Before-Tax
Net change	$ 50,534	$ 206,712	$ (949,946)
Tax Effect
Net change	(15,198)	(61,679)	274,698
Net-of-Tax
Unrealized losses on debt securities transferred from AFS to HTM	0	0	(112,991)
Other comprehensive income (loss)	35,336	145,033	(675,248)
Debt Securities
Before-Tax
Net unrealized gains (losses) on AFS debt securities arising during the period	71,259	109,216	(721,100)
Unrealized losses on debt securities transferred from AFS to HTM	0	0	(160,416)
Net realized (gains) losses on AFS debt securities reclassified into net income	(2,069)	6,862	(1,306)
Amortization of unrealized losses on transferred securities	15,452	15,860	18,000
Net change	84,642	131,938	(864,822)
Tax Effect
Net unrealized gains (losses) on AFS debt securities arising during the period	(20,957)	(32,286)	213,221
Unrealized losses on debt securities transferred from AFS to HTM	0	0	47,425
Net realized (gains) losses on AFS debt securities reclassified into net income	612	(2,029)	386
Amortization of unrealized losses on transferred securities	(4,568)	(4,689)	(5,322)
Net change	(24,913)	(39,004)	255,710
Net-of-Tax
Net unrealized gains (losses) on AFS debt securities arising during the period	50,302	76,930	(507,879)
Unrealized losses on debt securities transferred from AFS to HTM	0	0	(112,991)
Net realized (gains) losses on AFS debt securities reclassified into net income	(1,457)	4,833	(920)
Amortization of unrealized losses on transferred securities	10,884	11,171	12,678
Net unrealized (losses) gains arising during the period	50,302	76,930	(620,870)
Net realized losses reclassified into net income	9,427	16,004	11,758
Other comprehensive income (loss)	59,729	92,934	(609,112)
Cash Flow Hedges
Before-Tax
Net unrealized (losses) gains arising during the period	(124,382)	(5,767)	(74,069)
Net realized losses reclassified into net income	91,083	79,843	4,004
Net change	(33,299)	74,076	(70,065)
Tax Effect
Net unrealized (losses) gains arising during the period	36,935	1,490	21,446
Net realized losses reclassified into net income	(27,047)	(23,411)	(1,169)
Net change	9,888	(21,921)	20,277
Net-of-Tax
Net unrealized (losses) gains arising during the period	(87,447)	(4,277)	(52,623)
Net realized losses reclassified into net income	64,036	56,432	2,835
Other comprehensive income (loss)	(23,411)	52,155	(49,788)
Foreign Currency Translation Adjustments
Before-Tax
Net unrealized (losses) gains arising during the period	(809)	698	(15,059)
Net change	(809)	698	(15,059)
Tax Effect
Net unrealized (losses) gains arising during the period	(173)	(754)	(1,289)
Net change	(173)	(754)	(1,289)
Net-of-Tax
Net unrealized (losses) gains arising during the period	(982)	(56)	(16,348)
Net realized losses reclassified into net income	0	0	0
Other comprehensive income (loss)	$ (982)	$ (56)	$ (16,348)

Regulatory Requirements and M_3

Regulatory Requirements and Matters - Narrative (Details)	Dec. 31, 2024
Banking and Thrift, Interest [Abstract]
Common equity tier 1 capital adequacy to risk weighted assets	0.045
Banking regulation, tier one risk-based capital ratio, capital a, minimum	0.060
Banking regulation, total risk-based capital ratio, capital adequacy, minimum	0.080
Banking regulation, tier one leverage capital ratio, capital adequacy, minimum	0.040
Fully phased-in capital conservation buffer	2.50%

Regulatory Requirements and M_4

Regulatory Requirements and Matters - Regulatory Capital Information (Details) $ in Thousands	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Minimum Regulatory Requirements
Total capital ratio required for capital adequacy to risk weighted assets	0.080
Tier 1 capital ratio required for capital adequacy to risk weighted assets	0.060
Common equity tier 1 capital adequacy to risk weighted assets	0.045
Tier 1 leverage capital (to adjusted quarterly average assets), Ratio (as a percent)	0.040
Well-Capitalized Requirement
Fully phased-in capital conservation buffer	2.50%
Company
Actual
Total capital (to risk-weighted assets), Amount	$ 8,561,797	$ 7,919,407
Tier I capital (to risk-weighted assets), Amount	7,839,816	7,140,778
CET1 capital (to risk-weighted assets), Amount	7,839,816	7,140,778
Tier 1 leverage capital (to adjusted quarterly average assets), Amount	$ 7,839,816	$ 7,140,778
Total capital (to risk-weighted assets), Ratio (as a percent)	0.156	0.148
Tier I capital (to risk-weighted assets), Ratio (as a percent)	0.143	0.133
CET1 capital (to risk-weighted assets), Ratio (as a percent)	0.143	0.133
Tier 1 leverage capital (to adjusted quarterly average assets), Ratio (as a percent)	0.104	0.102
Minimum Regulatory Requirements
Total capital ratio required for capital adequacy to risk weighted assets	0.080
Tier 1 capital ratio required for capital adequacy to risk weighted assets	0.060
Common equity tier 1 capital adequacy to risk weighted assets	0.045
Tier 1 leverage capital (to adjusted quarterly average assets), Ratio (as a percent)	0.040
Minimum Regulatory Requirements including Capital Conservation Buffer
Total capital (to risk-weighted assets), Ratio (as a percent)	10.50%
Tier I capital (to risk-weighted assets), Ratio (as a percent)	8.50%
CET1 capital (to risk-weighted assets), Ratio (as a percent)	7%
Tier 1 leverage capital (to adjusted quarterly average assets), Ratio (as a percent)	4%
Well-Capitalized Requirement
Total capital (to risk-weighted assets), Ratio (as a percent)	0.100
Tier I capital (to risk-weighted assets), Ratio (as a percent)	0.060
East West Bank
Actual
Total capital (to risk-weighted assets), Amount	$ 8,053,389	$ 7,363,575
Tier I capital (to risk-weighted assets), Amount	7,367,996	6,732,946
CET1 capital (to risk-weighted assets), Amount	7,367,996	6,732,946
Tier 1 leverage capital (to adjusted quarterly average assets), Amount	$ 7,367,996	$ 6,732,946
Total capital (to risk-weighted assets), Ratio (as a percent)	0.147	0.138
Tier I capital (to risk-weighted assets), Ratio (as a percent)	0.134	0.126
CET1 capital (to risk-weighted assets), Ratio (as a percent)	0.134	0.126
Tier 1 leverage capital (to adjusted quarterly average assets), Ratio (as a percent)	0.098	0.096
Minimum Regulatory Requirements
Total capital ratio required for capital adequacy to risk weighted assets	0.080
Tier 1 capital ratio required for capital adequacy to risk weighted assets	0.060
Common equity tier 1 capital adequacy to risk weighted assets	0.045
Tier 1 leverage capital (to adjusted quarterly average assets), Ratio (as a percent)	0.040
Minimum Regulatory Requirements including Capital Conservation Buffer
Total capital (to risk-weighted assets), Ratio (as a percent)	10.50%
Tier I capital (to risk-weighted assets), Ratio (as a percent)	8.50%
CET1 capital (to risk-weighted assets), Ratio (as a percent)	7%
Tier 1 leverage capital (to adjusted quarterly average assets), Ratio (as a percent)	4%
Well-Capitalized Requirement
Total capital (to risk-weighted assets), Ratio (as a percent)	0.100
Tier I capital (to risk-weighted assets), Ratio (as a percent)	0.080
CET1 capital (to risk-weighted assets), Ratio (as a percent)	0.065
Tier 1 leverage capital (to adjusted quarterly average assets), Ratio (as a percent)	0.050

Business Segments - Narrative (

Business Segments - Narrative (Details)	12 Months Ended
	Dec. 31, 2024 segment
Segment Reporting [Abstract]
Number of reportable segments	3

Business Segments - Schedule Of

Business Segments - Schedule Of Operating Results And Other Key Financial Measures For The Individual Operating Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information
Net interest income before provision for credit losses	$ 2,278,716	$ 2,312,254	$ 2,045,881
Noninterest income	335,218	295,264	298,666
Total revenue (loss) before provision for credit losses	2,613,934	2,607,518	2,344,547
Provision for (reversal of) credit losses	174,000	125,000	73,500
Compensation and employee benefits	550,734	508,538	477,635
Other noninterest expense	407,339	514,210	381,758
Total noninterest expense	958,073	1,022,748	859,393
INCOME BEFORE INCOME TAXES	1,481,861	1,459,770	1,411,654
Segment net income	1,165,586	1,161,161	1,128,083
Loans	52,368,780	49,545,136	45,319,458
Deposits	59,673,039	54,962,731	54,299,579
Segment assets	75,976,475	69,612,884	64,112,150
Consumer and Business Banking
Segment Reporting Information
Net interest income before provision for credit losses	1,152,033	1,225,954	1,061,238
Noninterest income	108,773	103,890	113,722
Total revenue (loss) before provision for credit losses	1,260,806	1,329,844	1,174,960
Provision for (reversal of) credit losses	8,691	21,454	25,983
Compensation and employee benefits	217,612	203,387	195,394
Other noninterest expense	234,494	262,086	196,581
Total noninterest expense	452,106	465,473	391,975
INCOME BEFORE INCOME TAXES	800,009	842,917	757,002
Segment net income	563,218	594,965	537,754
Loans	18,966,662	17,739,984	15,534,259
Deposits	30,815,912	28,174,781	27,276,151
Segment assets	20,084,814	19,165,172	17,183,425
Commercial Banking
Segment Reporting Information
Net interest income before provision for credit losses	1,125,931	1,116,013	988,158
Noninterest income	197,780	168,502	174,365
Total revenue (loss) before provision for credit losses	1,323,711	1,284,515	1,162,523
Provision for (reversal of) credit losses	166,953	100,391	48,248
Compensation and employee benefits	234,240	217,663	211,355
Other noninterest expense	161,969	158,949	102,018
Total noninterest expense	396,209	376,612	313,373
INCOME BEFORE INCOME TAXES	760,549	807,512	800,902
Segment net income	535,652	570,153	569,982
Loans	32,996,221	31,365,547	29,321,701
Deposits	25,820,956	23,304,066	23,252,073
Segment assets	35,646,939	35,020,106	32,770,772
Treasury and Other
Segment Reporting Information
Net interest income before provision for credit losses	752	(29,713)	(3,515)
Noninterest income	28,665	22,872	10,579
Total revenue (loss) before provision for credit losses	29,417	(6,841)	7,064
Provision for (reversal of) credit losses	(1,644)	3,155	(731)
Compensation and employee benefits	98,882	87,488	70,886
Other noninterest expense	10,876	93,175	83,159
Total noninterest expense	109,758	180,663	154,045
INCOME BEFORE INCOME TAXES	(78,697)	(190,659)	(146,250)
Segment net income	66,716	(3,957)	20,347
Loans	405,897	439,605	463,498
Deposits	3,036,171	3,483,884	3,771,355
Segment assets	$ 20,244,722	$ 15,427,606	$ 14,157,953

Parent Company Condensed Fina_3

Parent Company Condensed Financial Statements - Schedule of Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Cash and cash equivalents due from banks	$ 5,250,742	$ 4,614,984
Other assets	1,907,189	1,964,743
TOTAL	75,976,475	69,612,884	$ 64,112,150
LIABILITIES AND STOCKHOLDERS’ EQUITY
Total stockholders’ equity	7,723,054	6,950,834	$ 5,984,612	$ 5,837,218
TOTAL	75,976,475	69,612,884
Parent Company
ASSETS
Cash and cash equivalents due from banks	394,919	445,770
Other assets	125,552	120,742
TOTAL	7,781,978	7,122,866
LIABILITIES AND STOCKHOLDERS’ EQUITY
Long-term debt	32,001	148,249
Other liabilities	26,923	23,783
Total stockholders’ equity	7,723,054	6,950,834
TOTAL	7,781,978	7,122,866
Parent Company | Bank
ASSETS
Investments in subsidiaries	7,251,084	6,542,852
Parent Company | Nonbank
ASSETS
Investments in subsidiaries	$ 10,423	$ 13,502

Parent Company Condensed Fina_4

Parent Company Condensed Financial Statements - Schedule of Condensed Statement of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of income
Compensation and employee benefits	$ 550,734	$ 508,538	$ 477,635
Other expense (income)	148,301	140,222	118,166
Income tax benefit	(316,275)	(298,609)	(283,571)
NET INCOME	1,165,586	1,161,161	1,128,083
Parent Company
Statement of income
Other investment losses	(954)	(2,738)	0
Other income	31	0	0
Total income	539,204	701,584	240,157
Interest expense on long-term debt	4,507	10,889	5,450
Compensation and employee benefits	7,283	7,204	6,708
Other expense (income)	1,839	(1,086)	1,254
Total expense	13,629	17,007	13,412
Income before income tax benefit and equity in undistributed income of subsidiaries	525,575	684,577	226,745
Income tax benefit	4,143	5,844	4,269
Undistributed earnings of subsidiaries, primarily bank	635,868	470,740	897,069
NET INCOME	1,165,586	1,161,161	1,128,083
Other noninterest recovery		3,000	2,000
Parent Company | Bank
Statement of income
Dividends from subsidiaries	540,000	704,000	240,000
Parent Company | Nonbank
Statement of income
Dividends from subsidiaries	$ 127	$ 322	$ 157

Parent Company Condensed Fina_5

Parent Company Condensed Financial Statements - Schedule of Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of cash flows
Net income	$ 1,165,586	$ 1,161,161	$ 1,128,083
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income tax expense (benefit)	(14,283)	(49,139)	(43,988)
Net change in other assets	63,743	(146,270)	187,512
Net change in other liabilities	(242,443)	105,304	461,385
Other operating activities, net	(3,755)	3,860	1,673
Net cash provided by operating activities	1,411,667	1,424,909	2,066,022
CASH FLOWS FROM INVESTING ACTIVITIES
Other investing activities, net	(14,704)	(112,036)	(8,454)
Net cash used in investing activities	(6,295,203)	(4,247,161)	(4,582,892)
Long-term debt:
Repayment of junior subordinated debt	(117,437)	(871)	(943)
Common stock:
Proceeds from issuance pursuant to various stock compensation plans and agreements	3,023	3,208	3,178
Stock tendered for payment of withholding taxes	(14,877)	(23,751)	(19,087)
Repurchase of common stock pursuant to the stock repurchase program	(143,082)	(82,174)	(99,990)
Cash dividends paid	(308,478)	(274,554)	(228,381)
Net cash provided by financing activities	5,527,526	3,962,454	2,114,210
Net (decrease) increase in cash and cash equivalents	635,758	1,133,200	(431,151)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	4,614,984	3,481,784	3,912,935
CASH AND CASH EQUIVALENTS, END OF YEAR	5,250,742	4,614,984	3,481,784
Parent Company
Statement of cash flows
Net income	1,165,586	1,161,161	1,128,083
Adjustments to reconcile net income to net cash provided by operating activities:
Undistributed earnings of subsidiaries, principally bank	(635,868)	(470,740)	(897,069)
Deferred income tax expense (benefit)	2,788	948	(2,193)
Net change in other assets	(6,912)	(4,160)	4,250
Net change in other liabilities	(802)	(47)	779
Other operating activities, net	1,265	2,443	1,333
Net cash provided by operating activities	526,057	689,605	235,183
CASH FLOWS FROM INVESTING ACTIVITIES
Redemption of trust preferred securities	3,558	0	0
Other investing activities, net	(494)	(95,095)	(7,390)
Net cash used in investing activities	3,064	(95,095)	(7,390)
Long-term debt:
Repayment of junior subordinated debt	(116,558)	0	0
Common stock:
Proceeds from issuance pursuant to various stock compensation plans and agreements	3,023	3,208	3,178
Stock tendered for payment of withholding taxes	(14,877)	(23,751)	(19,087)
Repurchase of common stock pursuant to the stock repurchase program	(143,082)	(82,174)	(99,990)
Cash dividends paid	(308,478)	(274,554)	(228,381)
Net cash provided by financing activities	(579,972)	(377,271)	(344,280)
Net (decrease) increase in cash and cash equivalents	(50,851)	217,239	(116,487)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	445,770	228,531	345,018
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 394,919	$ 445,770	$ 228,531

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event - USD ($) $ / shares in Units, $ in Millions	Jan. 23, 2025	Jan. 22, 2025
Subsequent events
Dividends paid per common share (in dollars per share)	$ 0.60
Additional share repurchase authorized amount		$ 300