SEC EDGAR · 10-Q
10-Q – 2025-11-07 – ewbc-20250930.htm

493264 tecken · 3 HTML-del(ar)
Fulltext som ren TXT · Öppna originalkällan
Automatiskt nyckeltalsindex

Detta är sökträffar och textkontext, inte verifierade eller normaliserade redovisningsvärden.
Omsättning
Item 2. | Unregistered Sales of Equity Securities and Use of Proceeds | 110
Net gains on AFS debt securities ( 934 ) ( 1,979 ) | Net loss on other real estate owned (“OREO”) write-downs and sales 4,426 2,250
( 3,269 ) ( 2,491 ) | Proceeds from sales and paydowns/payoffs of loans originally classified as held-for-sale 3,266 2,629
AFS debt securities: | Proceeds from sales 606,685 1,361,386 | Proceeds from repayments, maturities and redemptions 2,566,741 1,073,539
Loans held-for-investment: | Proceeds from sales of loans originally classified as held-for-investment 251,012 702,564 | Purchases ( 709,194 ) ( 741,188 )
Proceeds from sales of OREO | 30,939 24,550
In connection with the Company’s acquisition of a 49.99 % equity interest in an investee during the third quarter of 2023, the Company granted 349 thousand performance-based restricted stock units (“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 the investee meeting certain financial performance targets during the performance period. The fair value of liability-classified equity contracts vari
Equity contracts (2) | $ 15,119 Internal model Payout % based on operating revenue and operating EBITDA of investee | 84 % 84 %
EBITDA
In connection with the Company’s acquisition of a 49.99 % equity interest in an investee during the third quarter of 2023, the Company granted 349 thousand performance-based restricted stock units (“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 the investee meeting certain financial performance targets during the performance period. The fair value of liability-classified equity contracts vari
Equity contracts (2) | $ 15,119 Internal model Payout % based on operating revenue and operating EBITDA of investee | 84 % 84 %
Periodens resultat
96,730 90,151 289,594 253,566 | NET INCOME $ 368,394 $ 299,166 $ 968,917 $ 872,471 | EARNINGS PER SHARE (“EPS”)
2025 2024 2025 2024 | Net income $ 368,394 $ 299,166 $ 968,917 $ 872,471 | Other comprehensive income, net of tax:
Net income — — 299,166 — — 299,166 | Other comprehensive income — — — — 216,869 216,869
Net income — — 368,394 — — 368,394 | Other comprehensive income — — — — 86,823 86,823
— — ( 9,482 ) — — ( 9,482 ) | Net income — — 872,471 — — 872,471 | Other comprehensive income
Net income — — 968,917 — — 968,917 | Other comprehensive income
CASH FLOWS FROM OPERATING ACTIVITIES | Net income $ 968,917 $ 872,471 | Adjustments to reconcile net income to net cash provided by operating activities:
Net income $ 968,917 $ 872,471 | Adjustments to reconcile net income to net cash provided by operating activities:
Resultat per aktie
12 — Stockholders’ Equity and Earnings Per Share | 59
NET INCOME $ 368,394 $ 299,166 $ 968,917 $ 872,471 | EARNINGS PER SHARE (“EPS”) | BASIC $ 2.68 $ 2.16 $ 7.03 $ 6.28
Note 12 — Stockholders’ Equity and Earnings Per Share
The following table presents the basic and diluted EPS calculations for the three and nine months ended September 30, 2025 and 2024. 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 the Company’s 2024 Form 10-K.
Weighted-average number of shares outstanding 137,676 138,606 137,897 138,997 | Basic EPS $ 2.68 $ 2.16 $ 7.03 $ 6.28 | Diluted:
Diluted weighted-average number of shares outstanding 138,942 139,648 139,090 139,939 | Diluted EPS $ 2.65 $ 2.14 $ 6.97 $ 6.23
Approximately two thousand and nine thousand weighted-average shares of anti-dilutive RSUs were excluded from the diluted EPS computations for the three and nine months ended September 30, 2025, respectively. In comparison, approximately one thousand and five thousand weighted-average shares of anti-dilutive RSUs were excluded from the diluted EPS computations for the three and nine months ended September 30, 2024, respectively.
• Earnings per share growth. Third quarter 2025 basic and diluted earnings per share (“EPS”) both increased 24% to $2.68 and $2.65, respectively, from the third quarter of 2024. For the first nine months of 2025 basic and diluted EPS both increased 12% to $7.03 and $6.97, respectively, from the first nine months of 2024.
Kassaflöde
Amortization of unrealized losses on debt securities transferred from AFS to HTM 4,102 2,765 8,015 8,161 | Net changes in unrealized gains on cash flow hedges | 1,802 83,202 51,211 36,519
SUPPLEMENTAL CASH FLOW INFORMATION: | Cash paid during the period for:
• 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 utili
• Corporate debt securities — The market value movement as of September 30, 2025 was primarily due to interest rate movement and spread change. A portion of the corporate debt securities is comprised of subordinated debt securities issued by U.S. banks. These securities are nearly all rated investment grade by nationally recognized statistical rating organizations (“NRSROs”) and issued by well-capitalized financial institutions with strong profitability. The contractual payments from these corpo | • Non-agency mortgage-backed securities — The market value movement for the majority of these securities as of September 30, 2025 was primarily due to interest rate movement and spread change. In contrast, one non-agency commercial mortgage-backed security experienced a deterioration in both its credit rating and expected cash flows, resulting in its fair value falling below its amortized cost. Consequently, a credit-related impairment of $ 3 million was recognized through allowance for credit l
Cash flow hedges: | Interest rate contracts $ 4,250,000 $ 42,415 $ 1,010 $ 5,250,000 $ 5,647 $ 35,211
Cash Flow Hedges — The Company uses interest rate swaps and collars to hedge the variability in the interest amount received on certain floating-rate commercial loans due to changes in the contractually specified interest rates. As of September 30, 2025, interest rate contracts in notional amounts of $ 4.3 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 ar
The following table presents the pre-tax changes in AOCI from cash flow hedges for the three and nine months ended September 30, 2025 and 2024. The after-tax impact of cash flow hedges on AOCI is shown in Note 13 — Accumulated Other Comprehensive Income (Loss) to the Consolidated Financial Statements in this Form 10-Q.
Interest and dividend income (for cash flow hedges on loans) $ 6,001 $ 24,272 $ 18,584 $ 73,471
Likvida medel
Interest-bearing cash with banks 4,017,647 4,890,008 | Cash and cash equivalents 4,694,194 5,250,742 | Interest-bearing deposits with banks 68,200 48,198
2,591,879 4,106,361 | Effect of exchange rate changes on cash and cash equivalents ( 15,287 ) 6,746 | NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS
Effect of exchange rate changes on cash and cash equivalents ( 15,287 ) 6,746 | NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS | ( 556,548 ) 245,089
( 556,548 ) 245,089 | CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 5,250,742 4,614,984 | CASH AND CASH EQUIVALENTS, END OF PERIOD $ 4,694,194 $ 4,860,073
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 5,250,742 4,614,984 | CASH AND CASH EQUIVALENTS, END OF PERIOD $ 4,694,194 $ 4,860,073
Financial assets: | Cash and cash equivalents $ 4,694,194 $ 4,694,194 $ — $ — $ 4,694,194 | Interest-bearing deposits with banks $ 68,200 $ — $ 68,200 $ — $ 68,200
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
Hong Kong branch: | Cash and cash equivalents $ 718,583 1 % $ 730,227 1 %
Nettoskuld
Net income $ 968,917 $ 872,471 | Adjustments to reconcile net income to net cash provided by operating activities:
Total adjustments ( 180,625 ) 39,063 | Net cash provided by operating activities 788,292 911,534 | CASH FLOWS FROM INVESTING ACTIVITIES
Other investing activities, net 8,567 11,687 | Net cash used in investing activities ( 3,921,432 ) ( 4,779,552 )
Cash dividends paid ( 251,439 ) ( 232,132 ) | Net cash provided by financing activities | 2,591,879 4,106,361
Eget kapital
Consolidated Statement of Changes in Stockholders’ Equity (Unaudited) | 7
12 — Stockholders’ Equity and Earnings Per Share | 59
STOCKHOLDERS’ EQUITY | Common stock, $ 0.001 par value, 200,000,000 shares authorized; 170,463,795 and 169,925,379 shares issued
Accumulated other comprehensive loss (“AOCI”), net of tax ( 375,557 ) ( 585,260 ) | Total stockholders’ equity 8,582,800 7,723,054 | TOTAL $ 79,669,531 $ 75,976,475
EAST WEST BANCORP, INC. AND SUBSIDIARIES | CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY | ($ in thousands, except shares and per share data)
Common Stock and Additional Paid-in Capital Retained Earnings Treasury Stock AOCI, Net of Tax Total Stockholders’ Equity | Shares Amount
Note 12 — Stockholders’ Equity and Earnings Per Share
• Strong capital levels. Stockholders’ equity was $8.6 billion as of September 30, 2025, up $860 million or 11%, from December 31, 2024. Book value per share of $62.39 as of September 30, 2025, increased $6.60 or 12%, compared with December 31, 2024. Tangible book value per share of $58.97 as of September 30, 2025, increased $6.59 or 13%, compared with December 31, 2024. Tangible book value per share is a non-GAAP financial measure. For additional details, see the reconciliation of non-GAAP fina
Antal aktier
Yes ☐ No ☒ | Number of shares outstanding of the issuer’s common stock on the latest practicable date: 137,585,604 shares as of October 31, 2025 .
DILUTED $ 2.65 $ 2.14 $ 6.97 $ 6.23 | WEIGHTED-AVERAGE NUMBER OF SHARES OUTSTANDING | BASIC 137,676 138,606 137,897 138,997
Net income $ 368,394 $ 299,166 $ 968,917 $ 872,471 | Weighted-average number of shares outstanding 137,676 138,606 137,897 138,997 | Basic EPS $ 2.68 $ 2.16 $ 7.03 $ 6.28
Weighted-average number of shares outstanding 137,676 138,606 137,897 138,997 | Add: Dilutive impact of unvested RSUs 1,266 1,042 1,193 942
Add: Dilutive impact of unvested RSUs 1,266 1,042 1,193 942 | Diluted weighted-average number of shares outstanding 138,942 139,648 139,090 139,939 | Diluted EPS $ 2.65 $ 2.14 $ 6.97 $ 6.23
Weighted-average number of shares outstanding: | Basic 137,676 138,606 137,897 138,997
Total deposits $ 66,587,556 $ 63,175,023 | Common shares outstanding at period-end 137,568 138,437 | Book value per share $ 62.39 $ 55.79
Calendar Month Total Number of Shares Purchased (1) | Average Price Paid
Antal anställda
• the success and timing of the Company’s business strategies; | • the Company’s ability to retain key officers and employees; | • changes in interest rates, competition, regulatory requirements and product mix;
Stock-Based Compensation — The Company recognizes compensation expense related to stock awards over the requisite service period, generally based on the instruments’ grant-date fair value, reduced by expected forfeitures. Effective third quarter 2025, compensation cost related to awards granted to employees who meet certain age plus years-of-service requirements (“retirement-eligible employees”) is accrued over the service period required to earn the award prior to the grant date, in accordance
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 bot
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 incu
East West is a bank holding company incorporated in Delaware on August 26, 1998, and is registered under the Bank Holding Company Act of 1956, as amended. The Company commenced business on December 30, 1998 when, pursuant to a reorganization, it acquired all of the voting stock of the Bank, which became its principal asset. The Bank is an independent commercial bank headquartered in California that focuses on the financial service needs of individuals and businesses that operate in both the U.S.
Evolving trade policies and tariffs, and the government shutdown in late 2025 have increased concerns about inflation, supply chain disruptions, and slower economic growth. The F ederal Reserve resumed lowering interest rates in September 2025, and signaled a cautious approach to further cuts as it monitors inflation and labor market conditions. The economic uncertainty caused by these factors could result in decreased consumer spending and curb business investments. The Company monitors changes
Compensation and employee benefits were $176 million for the third quarter of 2025, an increase of $40 million or 30%, compared with the third quarter of 2024. For the first nine months of 2025, compensation and employee benefits were $467 million, an increase of $56 million or 14%, compared with the first nine months of 2024. The increases were primarily driven by $27 million from the change in equity award expense recognition for retirement eligible employees, while the remaining increase was
The Treasury and Other segment income before income taxes increased $119 million for the third quarter of 2025, compared with the third quarter of 2024, primarily driven by a $143 million increase in net interest income and a $15 million increase in reversal of credit losses, partially offset by a $29 million increase in compensation and employee benefits and a $11 million increase in other noninterest expense. The net interest income increase was mainly driven by higher loan interest income, pr
Organisk tillväxt
East West is a bank holding company incorporated in Delaware on August 26, 1998, and is registered under the Bank Holding Company Act of 1956, as amended. The Company commenced business on December 30, 1998 when, pursuant to a reorganization, it acquired all of the voting stock of the Bank, which became its principal asset. The Bank is an independent commercial bank headquartered in California that focuses on the financial service needs of individuals and businesses that operate in both the U.S.
Fulltext

Dokumentet är delat för att hålla varje sida lätt att hämta. Del 1 · Del 2 · Del 3
ewbc-20250930 0001069157 12/31 2025 Q3 false http://fasb.org/us-gaap/2025#AccountingStandardsUpdate202302Member http://www.eastwestbank.com/20250930#LendingAndLoanServicingFees http://www.eastwestbank.com/20250930#LendingAndLoanServicingFees http://www.eastwestbank.com/20250930#LendingAndLoanServicingFees http://www.eastwestbank.com/20250930#LendingAndLoanServicingFees http://fasb.org/us-gaap/2025#OtherAssets http://fasb.org/us-gaap/2025#AccruedLiabilitiesAndOtherLiabilities http://fasb.org/us-gaap/2025#OtherAssets http://fasb.org/us-gaap/2025#AccruedLiabilitiesAndOtherLiabilities xbrli:shares iso4217:USD iso4217:USD xbrli:shares ewbc:trust xbrli:pure ewbc:security utr:Boe utr:MMBTU ewbc:company ewbc:quarter ewbc:segment 0001069157 2025-01-01 2025-09-30 0001069157 2025-10-31 0001069157 2025-09-30 0001069157 2024-12-31 0001069157 2025-07-01 2025-09-30 0001069157 2024-07-01 2024-09-30 0001069157 2024-01-01 2024-09-30 0001069157 us-gaap:CommonStockMember 2024-06-30 0001069157 us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember 2024-06-30 0001069157 us-gaap:RetainedEarningsMember 2024-06-30 0001069157 us-gaap:TreasuryStockCommonMember 2024-06-30 0001069157 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-06-30 0001069157 2024-06-30 0001069157 us-gaap:RetainedEarningsMember 2024-07-01 2024-09-30 0001069157 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommonStockMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember 2024-07-01 2024-09-30 0001069157 ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember us-gaap:CommonStockMember 2024-07-01 2024-09-30 0001069157 ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember us-gaap:TreasuryStockCommonMember 2024-07-01 2024-09-30 0001069157 ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommonStockMember 2024-09-30 0001069157 us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember 2024-09-30 0001069157 us-gaap:RetainedEarningsMember 2024-09-30 0001069157 us-gaap:TreasuryStockCommonMember 2024-09-30 0001069157 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-09-30 0001069157 2024-09-30 0001069157 us-gaap:CommonStockMember 2025-06-30 0001069157 us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember 2025-06-30 0001069157 us-gaap:RetainedEarningsMember 2025-06-30 0001069157 us-gaap:TreasuryStockCommonMember 2025-06-30 0001069157 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-06-30 0001069157 2025-06-30 0001069157 us-gaap:RetainedEarningsMember 2025-07-01 2025-09-30 0001069157 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommonStockMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember 2025-07-01 2025-09-30 0001069157 ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember us-gaap:CommonStockMember 2025-07-01 2025-09-30 0001069157 ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember us-gaap:TreasuryStockCommonMember 2025-07-01 2025-09-30 0001069157 ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember 2025-07-01 2025-09-30 0001069157 ewbc:StockRepurchasePlanMember us-gaap:CommonStockMember 2025-07-01 2025-09-30 0001069157 ewbc:StockRepurchasePlanMember us-gaap:TreasuryStockCommonMember 2025-07-01 2025-09-30 0001069157 ewbc:StockRepurchasePlanMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommonStockMember 2025-09-30 0001069157 us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember 2025-09-30 0001069157 us-gaap:RetainedEarningsMember 2025-09-30 0001069157 us-gaap:TreasuryStockCommonMember 2025-09-30 0001069157 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-09-30 0001069157 us-gaap:CommonStockMember 2023-12-31 0001069157 us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember 2023-12-31 0001069157 us-gaap:RetainedEarningsMember 2023-12-31 0001069157 us-gaap:TreasuryStockCommonMember 2023-12-31 0001069157 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2023-12-31 0001069157 2023-12-31 0001069157 srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember us-gaap:RetainedEarningsMember 2023-12-31 0001069157 srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember 2023-12-31 0001069157 us-gaap:RetainedEarningsMember 2024-01-01 2024-09-30 0001069157 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommonStockMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember 2024-01-01 2024-09-30 0001069157 ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember us-gaap:CommonStockMember 2024-01-01 2024-09-30 0001069157 ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember us-gaap:TreasuryStockCommonMember 2024-01-01 2024-09-30 0001069157 ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember 2024-01-01 2024-09-30 0001069157 ewbc:StockRepurchasePlanMember us-gaap:CommonStockMember 2024-01-01 2024-09-30 0001069157 ewbc:StockRepurchasePlanMember us-gaap:TreasuryStockCommonMember 2024-01-01 2024-09-30 0001069157 ewbc:StockRepurchasePlanMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommonStockMember 2024-12-31 0001069157 us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember 2024-12-31 0001069157 us-gaap:RetainedEarningsMember 2024-12-31 0001069157 us-gaap:TreasuryStockCommonMember 2024-12-31 0001069157 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-12-31 0001069157 us-gaap:RetainedEarningsMember 2025-01-01 2025-09-30 0001069157 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommonStockMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember 2025-01-01 2025-09-30 0001069157 ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember us-gaap:CommonStockMember 2025-01-01 2025-09-30 0001069157 ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember us-gaap:TreasuryStockCommonMember 2025-01-01 2025-09-30 0001069157 ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember 2025-01-01 2025-09-30 0001069157 ewbc:StockRepurchasePlanMember us-gaap:CommonStockMember 2025-01-01 2025-09-30 0001069157 ewbc:StockRepurchasePlanMember us-gaap:TreasuryStockCommonMember 2025-01-01 2025-09-30 0001069157 ewbc:StockRepurchasePlanMember 2025-01-01 2025-09-30 0001069157 2023-01-01 2023-12-31 0001069157 us-gaap:StockCompensationPlanMember 2025-07-01 2025-09-30 0001069157 ewbc:RayliantGlobalAdvisorsLimitedMember 2023-09-30 0001069157 2023-07-01 2023-09-30 0001069157 srt:MinimumMember ewbc:PerformanceBasedRestrictedStockUnitsMember 2023-07-01 2023-09-30 0001069157 srt:MaximumMember ewbc:PerformanceBasedRestrictedStockUnitsMember 2023-07-01 2023-09-30 0001069157 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 ewbc:ForeignGovernmentBondsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 ewbc:ForeignGovernmentBondsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 ewbc:ForeignGovernmentBondsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 ewbc:ForeignGovernmentBondsMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 us-gaap:CreditRiskContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:CreditRiskContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:CreditRiskContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:CreditRiskContractMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0001069157 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 ewbc:ForeignGovernmentBondsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 ewbc:ForeignGovernmentBondsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 ewbc:ForeignGovernmentBondsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 ewbc:ForeignGovernmentBondsMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:AssetBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:CollateralizedLoanObligationsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:CollateralizedLoanObligationsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:CollateralizedLoanObligationsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:CollateralizedLoanObligationsMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:InterestRateContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:InterestRateContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:InterestRateContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:InterestRateContractMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:CreditRiskContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:CreditRiskContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:CreditRiskContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:CreditRiskContractMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001069157 us-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember 2025-09-30 0001069157 us-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember 2024-12-31 0001069157 us-gaap:EquityContractMember 2025-01-01 2025-09-30 0001069157 us-gaap:EquityContractMember 2024-01-01 2024-09-30 0001069157 us-gaap:EquityContractMember 2024-07-01 2024-09-30 0001069157 us-gaap:EquityContractMember 2025-07-01 2025-09-30 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-06-30 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-06-30 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2023-12-31 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-07-01 2025-09-30 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-07-01 2024-09-30 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-01-01 2025-09-30 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-01-01 2024-09-30 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-09-30 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputPriceVolatilityMember us-gaap:EquityContractMember us-gaap:FairValueInputsLevel3Member ewbc:BlackScholesOptionPricingModelMember srt:MinimumMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputPriceVolatilityMember us-gaap:EquityContractMember us-gaap:FairValueInputsLevel3Member ewbc:BlackScholesOptionPricingModelMember srt:MaximumMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputPriceVolatilityMember us-gaap:EquityContractMember us-gaap:FairValueInputsLevel3Member ewbc:BlackScholesOptionPricingModelMember srt:WeightedAverageMember 2025-09-30 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:EquityContractMember us-gaap:FairValueInputsLevel3Member srt:WeightedAverageMember 2025-09-30 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member ewbc:PayoutBasedOnOperatingRevenueAndOperatingEBITDAOfInvesteeMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsRecurringMember ewbc:PayoutBasedOnOperatingRevenueAndOperatingEBITDAOfInvesteeMember us-gaap:EquityContractMember us-gaap:FairValueInputsLevel3Member srt:WeightedAverageMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputPriceVolatilityMember us-gaap:EquityContractMember us-gaap:FairValueInputsLevel3Member ewbc:BlackScholesOptionPricingModelMember srt:MinimumMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputPriceVolatilityMember us-gaap:EquityContractMember us-gaap:FairValueInputsLevel3Member ewbc:BlackScholesOptionPricingModelMember srt:MaximumMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputPriceVolatilityMember us-gaap:EquityContractMember us-gaap:FairValueInputsLevel3Member ewbc:BlackScholesOptionPricingModelMember srt:WeightedAverageMember 2024-12-31 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:EquityContractMember us-gaap:FairValueInputsLevel3Member srt:WeightedAverageMember 2024-12-31 0001069157 us-gaap:EquityContractMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member ewbc:PayoutBasedOnOperatingRevenueAndOperatingEBITDAOfInvesteeMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsRecurringMember ewbc:PayoutBasedOnOperatingRevenueAndOperatingEBITDAOfInvesteeMember us-gaap:EquityContractMember us-gaap:FairValueInputsLevel3Member srt:WeightedAverageMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member ewbc:CommercialAndIndustrialLoanMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member ewbc:CommercialAndIndustrialLoanMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:CommercialAndIndustrialLoanMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:CommercialAndIndustrialLoanMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member us-gaap:CommercialRealEstateMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:CommercialRealEstateMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:CommercialRealEstateMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:CommercialRealEstateMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember 2025-09-30 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember 2025-09-30 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member ewbc:CommercialAndIndustrialLoanMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member ewbc:CommercialAndIndustrialLoanMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:CommercialAndIndustrialLoanMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:CommercialAndIndustrialLoanMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member us-gaap:CommercialRealEstateMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member us-gaap:CommercialRealEstateMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:CommercialRealEstateMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:CommercialRealEstateMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member ewbc:ConstructionAndLandLoanMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member ewbc:ConstructionAndLandLoanMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ConstructionAndLandLoanMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:ConstructionAndLandLoanMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member srt:SingleFamilyMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member srt:SingleFamilyMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member srt:SingleFamilyMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember srt:SingleFamilyMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember 2024-12-31 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-12-31 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:CommercialAndIndustrialLoanMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:CommercialAndIndustrialLoanMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:CommercialAndIndustrialLoanMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:CommercialAndIndustrialLoanMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:CommercialRealEstateMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:CommercialRealEstateMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:CommercialRealEstateMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:CommercialRealEstateMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:MultifamilyResidentialMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:MultifamilyResidentialMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:MultifamilyResidentialMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:MultifamilyResidentialMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:ConstructionAndLandLoanMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:ConstructionAndLandLoanMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:ConstructionAndLandLoanMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:ConstructionAndLandLoanMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:TotalCommercialRealEstateMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:TotalCommercialRealEstateMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:TotalCommercialRealEstateMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember ewbc:TotalCommercialRealEstateMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember srt:SingleFamilyMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember srt:SingleFamilyMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember srt:SingleFamilyMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember srt:SingleFamilyMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-01-01 2024-09-30 0001069157 us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember 2025-07-01 2025-09-30 0001069157 us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-07-01 2024-09-30 0001069157 us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember 2025-01-01 2025-09-30 0001069157 us-gaap:LoansReceivableMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-01-01 2024-09-30 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember 2025-07-01 2025-09-30 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-07-01 2024-09-30 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember 2025-01-01 2025-09-30 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-01-01 2024-09-30 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember 2025-07-01 2025-09-30 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-07-01 2024-09-30 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember 2025-01-01 2025-09-30 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember 2024-01-01 2024-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember 2025-07-01 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember 2024-07-01 2024-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember 2025-01-01 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember 2024-01-01 2024-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfCollateralDiscountMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:MeasurementInputDiscountRateMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfCollateralDiscountMember srt:MinimumMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:MeasurementInputDiscountRateMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfCollateralDiscountMember srt:MaximumMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:MeasurementInputDiscountRateMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfCollateralDiscountMember srt:WeightedAverageMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfCollateralContractValueMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:MeasurementInputCostToSellMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember srt:MinimumMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:MeasurementInputCostToSellMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember srt:MaximumMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:MeasurementInputCostToSellMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember srt:WeightedAverageMember 2025-09-30 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueIndividualAnalysisMember 2025-09-30 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember us-gaap:MeasurementInputCostToSellMember 2025-09-30 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfCollateralDiscountMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfCollateralDiscountMember us-gaap:MeasurementInputDiscountRateMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:MeasurementInputDiscountRateMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfCollateralDiscountMember srt:WeightedAverageMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfCollateralContractValueMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:MeasurementInputCostToSellMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember srt:MinimumMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:MeasurementInputCostToSellMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember srt:MaximumMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:MeasurementInputCostToSellMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember srt:WeightedAverageMember 2024-12-31 0001069157 ewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueIndividualAnalysisMember 2024-12-31 0001069157 ewbc:OtherRealEstateOwnedMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember 2024-12-31 0001069157 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember us-gaap:MeasurementInputCostToSellMember 2024-12-31 0001069157 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2025-09-30 0001069157 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001069157 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001069157 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001069157 us-gaap:EstimateOfFairValueFairValueDisclosureMember 2025-09-30 0001069157 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2024-12-31 0001069157 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001069157 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001069157 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001069157 us-gaap:EstimateOfFairValueFairValueDisclosureMember 2024-12-31 0001069157 us-gaap:USTreasurySecuritiesMember 2025-09-30 0001069157 us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember 2025-09-30 0001069157 ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember 2025-09-30 0001069157 ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember 2025-09-30 0001069157 us-gaap:USStatesAndPoliticalSubdivisionsMember 2025-09-30 0001069157 us-gaap:CommercialMortgageBackedSecuritiesMember 2025-09-30 0001069157 us-gaap:ResidentialMortgageBackedSecuritiesMember 2025-09-30 0001069157 us-gaap:CorporateDebtSecuritiesMember 2025-09-30 0001069157 ewbc:ForeignGovernmentBondsMember 2025-09-30 0001069157 us-gaap:AssetBackedSecuritiesMember 2025-09-30 0001069157 us-gaap:USTreasurySecuritiesMember 2024-12-31 0001069157 us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember 2024-12-31 0001069157 ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember 2024-12-31 0001069157 ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember 2024-12-31 0001069157 us-gaap:USStatesAndPoliticalSubdivisionsMember 2024-12-31 0001069157 us-gaap:CommercialMortgageBackedSecuritiesMember 2024-12-31 0001069157 us-gaap:ResidentialMortgageBackedSecuritiesMember 2024-12-31 0001069157 us-gaap:CorporateDebtSecuritiesMember 2024-12-31 0001069157 ewbc:ForeignGovernmentBondsMember 2024-12-31 0001069157 us-gaap:AssetBackedSecuritiesMember 2024-12-31 0001069157 us-gaap:CollateralizedLoanObligationsMember 2024-12-31 0001069157 ewbc:MortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember 2025-09-30 0001069157 ewbc:NonAgencyMortgageBackedSecuritiesMember 2025-09-30 0001069157 ewbc:MortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember 2024-12-31 0001069157 ewbc:NonAgencyMortgageBackedSecuritiesMember 2024-12-31 0001069157 ewbc:NonAgencyMortgageBackedSecuritiesMember 2025-01-01 2025-09-30 0001069157 ewbc:NonAgencyMortgageBackedSecuritiesMember 2025-07-01 2025-09-30 0001069157 us-gaap:AssetPledgedAsCollateralMember 2025-09-30 0001069157 us-gaap:AssetPledgedAsCollateralMember 2024-12-31 0001069157 ewbc:PrepositionedForFederalReserveBankStandingRepurchaseAgreementFacilityMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:NondesignatedMember ewbc:LondonClearingHouseChicagoMercantileExchangeMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:NondesignatedMember ewbc:LondonClearingHouseChicagoMercantileExchangeMember 2024-12-31 0001069157 us-gaap:InterestRateContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:CashFlowHedgingMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:CashFlowHedgingMember 2024-12-31 0001069157 us-gaap:InterestRateContractMember us-gaap:NondesignatedMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:NondesignatedMember 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:NondesignatedMember 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NondesignatedMember 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:NondesignatedMember 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:NondesignatedMember 2024-12-31 0001069157 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember 2025-09-30 0001069157 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember 2024-12-31 0001069157 us-gaap:EquityContractMember us-gaap:NondesignatedMember 2025-09-30 0001069157 us-gaap:EquityContractMember us-gaap:NondesignatedMember 2024-12-31 0001069157 us-gaap:NondesignatedMember 2025-09-30 0001069157 us-gaap:NondesignatedMember 2024-12-31 0001069157 us-gaap:NondesignatedMember srt:CrudeOilMember 2025-01-01 2025-09-30 0001069157 us-gaap:NondesignatedMember srt:NaturalGasReservesMember 2025-01-01 2025-09-30 0001069157 us-gaap:NondesignatedMember srt:CrudeOilMember 2024-01-01 2024-12-31 0001069157 us-gaap:NondesignatedMember srt:NaturalGasReservesMember 2024-01-01 2024-12-31 0001069157 ewbc:EquityPrivateCompaniesMember us-gaap:NondesignatedMember 2025-09-30 0001069157 ewbc:EquityPrivateCompaniesMember us-gaap:NondesignatedMember 2024-12-31 0001069157 ewbc:PerformanceBasedRestrictedStockSettledinStockMember us-gaap:NondesignatedMember 2024-12-31 0001069157 ewbc:PerformanceBasedRestrictedStockSettledinStockMember us-gaap:NondesignatedMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:DesignatedAsHedgingInstrumentMember ewbc:CommercialBankingMember us-gaap:CashFlowHedgingMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:CashFlowHedgingMember 2025-07-01 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:CashFlowHedgingMember 2024-07-01 2024-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:CashFlowHedgingMember 2025-01-01 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:CashFlowHedgingMember 2024-01-01 2024-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:CashFlowHedgingMember us-gaap:InterestIncomeMember 2025-07-01 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:CashFlowHedgingMember us-gaap:InterestIncomeMember 2024-07-01 2024-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:CashFlowHedgingMember us-gaap:InterestIncomeMember 2025-01-01 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:CashFlowHedgingMember us-gaap:InterestIncomeMember 2024-01-01 2024-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:NetInvestmentHedgingMember 2025-07-01 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:NetInvestmentHedgingMember 2024-07-01 2024-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:NetInvestmentHedgingMember 2025-01-01 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:DesignatedAsHedgingInstrumentMember us-gaap:NetInvestmentHedgingMember 2024-01-01 2024-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:NondesignatedMember srt:MaximumMember 2024-01-01 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:NondesignatedMember srt:MaximumMember 2025-01-01 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2024-12-31 0001069157 us-gaap:InterestRateContractMember ewbc:WrittenOptionMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember ewbc:WrittenOptionMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2024-12-31 0001069157 us-gaap:InterestRateContractMember ewbc:CollarsandCorridorsMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember ewbc:CollarsandCorridorsMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2024-12-31 0001069157 us-gaap:InterestRateContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember ewbc:ForwardAndSpotMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember ewbc:ForwardAndSpotMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember ewbc:WrittenOptionMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember ewbc:WrittenOptionMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2024-12-31 0001069157 us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2025-09-30 0001069157 us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2024-12-31 0001069157 us-gaap:InterestRateContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2024-12-31 0001069157 us-gaap:InterestRateContractMember ewbc:PurchasedOptionsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember ewbc:PurchasedOptionsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2024-12-31 0001069157 us-gaap:InterestRateContractMember ewbc:CollarsandCorridorsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember ewbc:CollarsandCorridorsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2024-12-31 0001069157 us-gaap:InterestRateContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember ewbc:ForwardAndSpotMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember ewbc:ForwardAndSpotMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember ewbc:PurchasedOptionsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember ewbc:PurchasedOptionsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2024-12-31 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2024-12-31 0001069157 us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-09-30 0001069157 us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:CrudeOilMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:CrudeOilMember 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:CrudeOilMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:CrudeOilMember 2024-12-31 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:CrudeOilMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:CrudeOilMember 2025-09-30 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:CrudeOilMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:CrudeOilMember 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:CrudeOilMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:CrudeOilMember 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:CrudeOilMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:CrudeOilMember 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2024-12-31 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2025-09-30 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2024-12-31 0001069157 us-gaap:CommodityContractMember ewbc:WrittenOptionMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember ewbc:WrittenOptionMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2025-09-30 0001069157 us-gaap:CommodityContractMember ewbc:WrittenOptionMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember ewbc:WrittenOptionMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember srt:NaturalGasReservesMember 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentTradingMember 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:CrudeOilMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:CrudeOilMember 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:CrudeOilMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:CrudeOilMember 2024-12-31 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:CrudeOilMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:CrudeOilMember 2025-09-30 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:CrudeOilMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:CrudeOilMember 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:CrudeOilMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:CrudeOilMember 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:CrudeOilMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:CrudeOilMember 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:SwapMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2024-12-31 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2025-09-30 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember ewbc:CollarsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2024-12-31 0001069157 us-gaap:CommodityContractMember ewbc:PurchasedOptionsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember ewbc:PurchasedOptionsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2025-09-30 0001069157 us-gaap:CommodityContractMember ewbc:PurchasedOptionsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember ewbc:PurchasedOptionsMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember srt:NaturalGasReservesMember 2024-12-31 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2024-12-31 0001069157 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember us-gaap:ShortMember 2025-09-30 0001069157 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember us-gaap:ShortMember 2024-12-31 0001069157 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember us-gaap:LongMember 2025-09-30 0001069157 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember us-gaap:LongMember 2024-12-31 0001069157 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember us-gaap:ShortMember 2025-01-01 2025-09-30 0001069157 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember us-gaap:ShortMember 2024-01-01 2024-12-31 0001069157 us-gaap:InterestRateContractMember us-gaap:NondesignatedMember ewbc:CustomerDerivativeIncomeLossNetOfMarkToMarketAdjustmentsMember 2025-07-01 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:NondesignatedMember ewbc:CustomerDerivativeIncomeLossNetOfMarkToMarketAdjustmentsMember 2024-07-01 2024-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:NondesignatedMember ewbc:CustomerDerivativeIncomeLossNetOfMarkToMarketAdjustmentsMember 2025-01-01 2025-09-30 0001069157 us-gaap:InterestRateContractMember us-gaap:NondesignatedMember ewbc:CustomerDerivativeIncomeLossNetOfMarkToMarketAdjustmentsMember 2024-01-01 2024-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:NondesignatedMember us-gaap:ForeignCurrencyGainLossMember 2025-07-01 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:NondesignatedMember us-gaap:ForeignCurrencyGainLossMember 2024-07-01 2024-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:NondesignatedMember us-gaap:ForeignCurrencyGainLossMember 2025-01-01 2025-09-30 0001069157 us-gaap:ForeignExchangeContractMember us-gaap:NondesignatedMember us-gaap:ForeignCurrencyGainLossMember 2024-01-01 2024-09-30 0001069157 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember ewbc:CustomerDerivativeIncomeLossNetOfMarkToMarketAdjustmentsMember 2025-07-01 2025-09-30 0001069157 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember ewbc:CustomerDerivativeIncomeLossNetOfMarkToMarketAdjustmentsMember 2024-07-01 2024-09-30 0001069157 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember ewbc:CustomerDerivativeIncomeLossNetOfMarkToMarketAdjustmentsMember 2025-01-01 2025-09-30 0001069157 us-gaap:CreditRiskContractMember us-gaap:NondesignatedMember ewbc:CustomerDerivativeIncomeLossNetOfMarkToMarketAdjustmentsMember 2024-01-01 2024-09-30 0001069157 us-gaap:EquityContractMember us-gaap:NondesignatedMember ewbc:LendingAndLoanServicingFeesMember 2025-07-01 2025-09-30 0001069157 us-gaap:EquityContractMember us-gaap:NondesignatedMember ewbc:LendingAndLoanServicingFeesMember 2024-07-01 2024-09-30 0001069157 us-gaap:EquityContractMember us-gaap:NondesignatedMember ewbc:LendingAndLoanServicingFeesMember 2025-01-01 2025-09-30 0001069157 us-gaap:EquityContractMember us-gaap:NondesignatedMember ewbc:LendingAndLoanServicingFeesMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NondesignatedMember ewbc:CustomerDerivativeIncomeLossNetOfMarkToMarketAdjustmentsMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NondesignatedMember ewbc:CustomerDerivativeIncomeLossNetOfMarkToMarketAdjustmentsMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NondesignatedMember ewbc:CustomerDerivativeIncomeLossNetOfMarkToMarketAdjustmentsMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommodityContractMember us-gaap:NondesignatedMember ewbc:CustomerDerivativeIncomeLossNetOfMarkToMarketAdjustmentsMember 2024-01-01 2024-09-30 0001069157 us-gaap:NondesignatedMember 2025-07-01 2025-09-30 0001069157 us-gaap:NondesignatedMember 2024-07-01 2024-09-30 0001069157 us-gaap:NondesignatedMember 2025-01-01 2025-09-30 0001069157 us-gaap:NondesignatedMember 2024-01-01 2024-09-30 0001069157 ewbc:CreditRiskRelatedContingentFeaturesMember 2025-09-30 0001069157 ewbc:CreditRiskRelatedContingentFeaturesMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:PassMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:CriticizedAccrualMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:CriticizedNonaccrualMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:GrossWriteoffMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:PassMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:CriticizedAccrualMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:CriticizedNonaccrualMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:GrossWriteoffMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:PassMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember ewbc:CriticizedAccrualMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember ewbc:CriticizedNonaccrualMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember ewbc:GrossWriteoffMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:PassMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember ewbc:CriticizedNonaccrualMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:GrossWriteoffMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:PassMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:CriticizedAccrualMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:CriticizedNonaccrualMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:GrossWriteoffMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:PassMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:CriticizedAccrualMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:CriticizedNonaccrualMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember ewbc:GrossWriteoffMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:PassMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember ewbc:CriticizedAccrualMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember ewbc:CriticizedNonaccrualMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:GrossWriteoffMember 2025-01-01 2025-09-30 0001069157 us-gaap:PassMember 2025-09-30 0001069157 ewbc:CriticizedAccrualMember 2025-09-30 0001069157 ewbc:CriticizedNonaccrualMember 2025-09-30 0001069157 ewbc:GrossWriteoffMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:PassMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:CriticizedAccrualMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:CriticizedNonaccrualMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:GrossWriteoffMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:PassMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:CriticizedAccrualMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:CriticizedNonaccrualMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:GrossWriteoffMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:PassMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember ewbc:CriticizedAccrualMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember ewbc:CriticizedNonaccrualMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember ewbc:GrossWriteoffMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:PassMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember ewbc:CriticizedNonaccrualMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember ewbc:GrossWriteoffMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember ewbc:GrossWriteoffMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:GrossWriteoffMember 2024-01-01 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:PassMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:CriticizedAccrualMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:CriticizedNonaccrualMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:GrossWriteoffMember 2024-01-01 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:PassMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:CriticizedAccrualMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:CriticizedNonaccrualMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:GrossWriteoffMember 2024-01-01 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember ewbc:GrossWriteoffMember 2024-01-01 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:PassMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember ewbc:CriticizedNonaccrualMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember ewbc:GrossWriteoffMember 2024-01-01 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:GrossWriteoffMember 2024-01-01 2024-12-31 0001069157 us-gaap:PassMember 2024-12-31 0001069157 ewbc:CriticizedAccrualMember 2024-12-31 0001069157 ewbc:CriticizedNonaccrualMember 2024-12-31 0001069157 ewbc:GrossWriteoffMember 2024-01-01 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember 2024-01-01 2024-09-30 0001069157 us-gaap:FederalHousingAdministrationLoanMember us-gaap:PassMember 2024-12-31 0001069157 us-gaap:FederalHousingAdministrationLoanMember us-gaap:PassMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:FinancialAssetNotPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:FinancialAssetPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:NonperformingFinancingReceivableMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:FinancialAssetNotPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:FinancialAssetPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:NonperformingFinancingReceivableMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:FinancialAssetNotPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:FinancialAssetPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:NonperformingFinancingReceivableMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:FinancialAssetNotPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:FinancialAssetPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:NonperformingFinancingReceivableMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember us-gaap:FinancialAssetNotPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember us-gaap:FinancialAssetPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember us-gaap:NonperformingFinancingReceivableMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FinancialAssetNotPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FinancialAssetPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:NonperformingFinancingReceivableMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:FinancialAssetNotPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:FinancialAssetPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:NonperformingFinancingReceivableMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:FinancialAssetNotPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:FinancialAssetPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:NonperformingFinancingReceivableMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember us-gaap:FinancialAssetNotPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember us-gaap:FinancialAssetPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember us-gaap:NonperformingFinancingReceivableMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:FinancialAssetNotPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:FinancialAssetPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:NonperformingFinancingReceivableMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancialAssetNotPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancialAssetPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:NonperformingFinancingReceivableMember 2025-09-30 0001069157 us-gaap:FinancialAssetNotPastDueMember 2025-09-30 0001069157 us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-09-30 0001069157 us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:FinancialAssetPastDueMember 2025-09-30 0001069157 us-gaap:NonperformingFinancingReceivableMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:FinancialAssetNotPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:FinancialAssetPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:NonperformingFinancingReceivableMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:FinancialAssetNotPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:FinancialAssetPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:NonperformingFinancingReceivableMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:FinancialAssetNotPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:FinancialAssetPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:NonperformingFinancingReceivableMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:FinancialAssetNotPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:FinancialAssetPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:NonperformingFinancingReceivableMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember us-gaap:FinancialAssetNotPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember us-gaap:FinancialAssetPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:TotalCommercialRealEstateMember us-gaap:NonperformingFinancingReceivableMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FinancialAssetNotPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FinancialAssetPastDueMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:NonperformingFinancingReceivableMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:FinancialAssetNotPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:FinancialAssetPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:NonperformingFinancingReceivableMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:FinancialAssetNotPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:FinancialAssetPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:NonperformingFinancingReceivableMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember us-gaap:FinancialAssetNotPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember us-gaap:FinancialAssetPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:TotalResidentialMortgageMember us-gaap:NonperformingFinancingReceivableMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:FinancialAssetNotPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:FinancialAssetPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:NonperformingFinancingReceivableMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancialAssetNotPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancialAssetPastDueMember 2024-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:NonperformingFinancingReceivableMember 2024-12-31 0001069157 us-gaap:FinancialAssetNotPastDueMember 2024-12-31 0001069157 us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-12-31 0001069157 us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-12-31 0001069157 us-gaap:FinancialAssetPastDueMember 2024-12-31 0001069157 us-gaap:NonperformingFinancingReceivableMember 2024-12-31 0001069157 us-gaap:ResidentialRealEstateMember 2025-09-30 0001069157 us-gaap:ResidentialRealEstateMember 2024-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:ExtendedMaturityMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:PaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:ExtendedMaturityMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:PaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:PaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:ExtendedMaturityMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:PaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:ExtendedMaturityMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:PaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:PaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:ExtendedMaturityMember 2025-07-01 2025-09-30 0001069157 us-gaap:PaymentDeferralMember 2025-07-01 2025-09-30 0001069157 ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-07-01 2025-09-30 0001069157 ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:ExtendedMaturityMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:PaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:ExtendedMaturityMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:PaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:PaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:ExtendedMaturityMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:PaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:ExtendedMaturityMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:PaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:PaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:ExtendedMaturityMember 2024-07-01 2024-09-30 0001069157 us-gaap:PaymentDeferralMember 2024-07-01 2024-09-30 0001069157 ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:ContractualInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:ContractualInterestRateReductionExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:ContractualInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:ContractualInterestRateReductionExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:ContractualInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember ewbc:ContractualInterestRateReductionExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:ContractualInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember ewbc:ContractualInterestRateReductionExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:ContractualInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ContractualInterestRateReductionExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:ContractualInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:ContractualInterestRateReductionExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:ContractualInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:ContractualInterestRateReductionExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:ContractualInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:ContractualInterestRateReductionExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ContractualInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0001069157 us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ExtendedMaturityAndInterestRateReductionMember 2025-01-01 2025-09-30 0001069157 ewbc:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 ewbc:ContractualInterestRateReductionExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0001069157 us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0001069157 ewbc:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 ewbc:ContractualInterestRateReductionAndPaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:InterestRateBelowMarketReductionMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:InterestRateBelowMarketReductionMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:InterestRateBelowMarketReductionMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:InterestRateBelowMarketReductionMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:InterestRateBelowMarketReductionMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:InterestRateBelowMarketReductionMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:InterestRateBelowMarketReductionMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:InterestRateBelowMarketReductionMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:InterestRateBelowMarketReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:InterestRateBelowMarketReductionMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:InterestRateBelowMarketReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:InterestRateBelowMarketReductionMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:InterestRateBelowMarketReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:InterestRateBelowMarketReductionMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:LandAndConstructionMember us-gaap:InterestRateBelowMarketReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:LandAndConstructionMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:LandAndConstructionMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:LandAndConstructionMember us-gaap:InterestRateBelowMarketReductionMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:LandAndConstructionMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:LandAndConstructionMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:InterestRateBelowMarketReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:InterestRateBelowMarketReductionMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:InterestRateBelowMarketReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:InterestRateBelowMarketReductionMember 2024-01-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:InterestRateBelowMarketReductionMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember us-gaap:InterestRateBelowMarketReductionMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:FinancingReceivables30To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:FinancingReceivables30To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember ewbc:FinancingReceivables30To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember ewbc:FinancingReceivables30To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:FinancingReceivables30To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:FinancingReceivables30To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:FinancingReceivables30To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:FinancingReceivables30To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2025-09-30 0001069157 ewbc:FinancingReceivables30To89DaysPastDueMember 2025-09-30 0001069157 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:FinancialAssetNotPastDueMember 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember ewbc:FinancingReceivables30To89DaysPastDueMember 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:FinancialAssetNotPastDueMember 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember ewbc:FinancingReceivables30To89DaysPastDueMember 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FinancialAssetNotPastDueMember 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:FinancingReceivables30To89DaysPastDueMember 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:FinancialAssetNotPastDueMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember ewbc:FinancingReceivables30To89DaysPastDueMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:FinancialAssetNotPastDueMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember ewbc:FinancingReceivables30To89DaysPastDueMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2024-09-30 0001069157 us-gaap:FinancialAssetNotPastDueMember ewbc:OtherConsumerMember 2024-09-30 0001069157 ewbc:FinancingReceivables30To89DaysPastDueMember ewbc:OtherConsumerMember 2024-09-30 0001069157 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember ewbc:OtherConsumerMember 2024-09-30 0001069157 ewbc:OtherConsumerMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancialAssetNotPastDueMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:FinancingReceivables30To89DaysPastDueMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember 2024-09-30 0001069157 us-gaap:FinancialAssetNotPastDueMember 2024-09-30 0001069157 ewbc:FinancingReceivables30To89DaysPastDueMember 2024-09-30 0001069157 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember 2025-06-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember 2025-06-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember 2025-06-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember 2025-06-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember 2025-06-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2025-06-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember 2025-06-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember 2025-07-01 2025-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember 2025-07-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember 2024-06-30 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember 2024-06-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember 2024-06-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember 2024-06-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember 2024-06-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2024-06-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember 2024-06-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember 2024-07-01 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember 2024-07-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember 2024-09-30 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember 2025-01-01 2025-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:CommercialAndIndustrialLoanMember 2023-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember us-gaap:CommercialRealEstateMember 2023-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember 2023-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember 2023-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember srt:SingleFamilyMember 2023-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember us-gaap:HomeEquityMember 2023-12-31 0001069157 us-gaap:ConsumerPortfolioSegmentMember ewbc:OtherConsumerMember 2023-12-31 0001069157 us-gaap:CommercialPortfolioSegmentMember srt:MultifamilyMember 2024-01-01 2024-09-30 0001069157 us-gaap:CommercialPortfolioSegmentMember ewbc:ConstructionAndLandLoanMember 2024-01-01 2024-09-30 0001069157 us-gaap:UnfundedLoanCommitmentMember 2025-06-30 0001069157 us-gaap:UnfundedLoanCommitmentMember 2024-06-30 0001069157 us-gaap:UnfundedLoanCommitmentMember 2024-12-31 0001069157 us-gaap:UnfundedLoanCommitmentMember 2023-12-31 0001069157 us-gaap:UnfundedLoanCommitmentMember 2025-07-01 2025-09-30 0001069157 us-gaap:UnfundedLoanCommitmentMember 2024-07-01 2024-09-30 0001069157 us-gaap:UnfundedLoanCommitmentMember 2025-01-01 2025-09-30 0001069157 us-gaap:UnfundedLoanCommitmentMember 2024-01-01 2024-09-30 0001069157 us-gaap:UnfundedLoanCommitmentMember 2025-09-30 0001069157 us-gaap:UnfundedLoanCommitmentMember 2024-09-30 0001069157 ewbc:LoansLeasesAndUnfundedCreditCommitmentsMember 2025-07-01 2025-09-30 0001069157 ewbc:LoansLeasesAndUnfundedCreditCommitmentsMember 2024-07-01 2024-09-30 0001069157 ewbc:LoansLeasesAndUnfundedCreditCommitmentsMember 2025-01-01 2025-09-30 0001069157 ewbc:LoansLeasesAndUnfundedCreditCommitmentsMember 2024-01-01 2024-09-30 0001069157 ewbc:LoansReceivableOriginatedMember 2025-07-01 2025-09-30 0001069157 ewbc:LoansReceivableOriginatedMember 2025-01-01 2025-09-30 0001069157 ewbc:LoansReceivableOriginatedMember 2024-07-01 2024-09-30 0001069157 ewbc:LoansReceivableOriginatedMember 2024-01-01 2024-09-30 0001069157 ewbc:LoansReceivablePurchasedMember ewbc:LoansSoldInSecondaryMarketMember 2025-07-01 2025-09-30 0001069157 ewbc:LoansReceivablePurchasedMember ewbc:LoansSoldInSecondaryMarketMember 2025-01-01 2025-09-30 0001069157 ewbc:LoansReceivablePurchasedMember ewbc:LoansSoldInSecondaryMarketMember 2024-07-01 2024-09-30 0001069157 ewbc:LoansReceivablePurchasedMember ewbc:LoansSoldInSecondaryMarketMember 2024-01-01 2024-09-30 0001069157 ewbc:AffordableHousingPartnershipMember 2025-09-30 0001069157 ewbc:AffordableHousingPartnershipMember 2024-12-31 0001069157 ewbc:TaxCreditAndCRAInvestmentsMember 2025-09-30 0001069157 ewbc:TaxCreditAndCRAInvestmentsMember 2024-12-31 0001069157 ewbc:AffordableHousingPartnershipMember 2025-07-01 2025-09-30 0001069157 ewbc:AffordableHousingPartnershipMember 2024-07-01 2024-09-30 0001069157 ewbc:AffordableHousingPartnershipMember 2025-01-01 2025-09-30 0001069157 ewbc:AffordableHousingPartnershipMember 2024-01-01 2024-09-30 0001069157 ewbc:TaxCreditAndCRAInvestmentsMember 2025-07-01 2025-09-30 0001069157 ewbc:TaxCreditAndCRAInvestmentsMember 2024-07-01 2024-09-30 0001069157 ewbc:TaxCreditAndCRAInvestmentsMember 2025-01-01 2025-09-30 0001069157 ewbc:TaxCreditAndCRAInvestmentsMember 2024-01-01 2024-09-30 0001069157 us-gaap:OtherAssetsMember 2025-09-30 0001069157 us-gaap:OtherAssetsMember 2024-12-31 0001069157 2024-01-01 2024-12-31 0001069157 us-gaap:JuniorSubordinatedDebtMember srt:ParentCompanyMember 2025-09-30 0001069157 us-gaap:JuniorSubordinatedDebtMember srt:ParentCompanyMember 2024-12-31 0001069157 srt:MinimumMember ewbc:FloatingMember 2025-09-30 0001069157 srt:MaximumMember ewbc:FloatingMember 2025-09-30 0001069157 ewbc:FloatingMember 2025-09-30 0001069157 ewbc:FloatingMember 2024-12-31 0001069157 srt:MinimumMember ewbc:FixedMember 2025-09-30 0001069157 srt:MaximumMember ewbc:FixedMember 2025-09-30 0001069157 ewbc:FixedMember 2025-09-30 0001069157 ewbc:FixedMember 2024-12-31 0001069157 ewbc:MCBIStatutoryTrustIMember us-gaap:JuniorSubordinatedDebtMember 2025-01-01 2025-09-30 0001069157 us-gaap:LoanOriginationCommitmentsMember 2025-09-30 0001069157 us-gaap:LoanOriginationCommitmentsMember 2024-12-31 0001069157 us-gaap:LetterOfCreditMember 2025-09-30 0001069157 us-gaap:LetterOfCreditMember 2024-12-31 0001069157 us-gaap:CommitmentsToExtendCreditMember 2025-09-30 0001069157 us-gaap:CommitmentsToExtendCreditMember 2024-12-31 0001069157 us-gaap:StandbyLettersOfCreditMember 2025-09-30 0001069157 ewbc:CommercialLettersOfCreditMember 2025-09-30 0001069157 us-gaap:StandbyLettersOfCreditMember 2024-12-31 0001069157 ewbc:CommercialLettersOfCreditMember 2024-12-31 0001069157 ewbc:LoansSoldorSecuritizedWithRecourseMember us-gaap:GuaranteeObligationsMember ewbc:SingleFamilyResidentialMember 2025-09-30 0001069157 ewbc:LoansSoldorSecuritizedWithRecourseMember us-gaap:GuaranteeObligationsMember ewbc:SingleFamilyResidentialMember 2024-12-31 0001069157 ewbc:LoansSoldorSecuritizedWithRecourseMember us-gaap:GuaranteeObligationsMember ewbc:MultifamilyResidentialMember 2025-09-30 0001069157 ewbc:LoansSoldorSecuritizedWithRecourseMember us-gaap:GuaranteeObligationsMember ewbc:MultifamilyResidentialMember 2024-12-31 0001069157 ewbc:LoansSoldorSecuritizedWithRecourseMember us-gaap:GuaranteeObligationsMember 2025-09-30 0001069157 ewbc:LoansSoldorSecuritizedWithRecourseMember us-gaap:GuaranteeObligationsMember 2024-12-31 0001069157 ewbc:LoansSoldorSecuritizedWithRecourseMember us-gaap:GuaranteeObligationsMember ewbc:SingleFamilyResidentialAndMultiFamilyResidentialMember 2025-09-30 0001069157 ewbc:LoansSoldorSecuritizedWithRecourseMember us-gaap:GuaranteeObligationsMember ewbc:SingleFamilyResidentialAndMultiFamilyResidentialMember 2024-12-31 0001069157 ewbc:A2021StockIncentivePlanMember 2025-09-30 0001069157 ewbc:A2021StockIncentivePlanMember 2024-12-31 0001069157 us-gaap:RestrictedStockUnitsRSUMember ewbc:CliffVestingMember 2025-01-01 2025-09-30 0001069157 srt:MinimumMember ewbc:PerformanceBasedRestrictedStockSettledinStockMember 2025-01-01 2025-09-30 0001069157 srt:MaximumMember ewbc:PerformanceBasedRestrictedStockSettledinStockMember 2025-01-01 2025-09-30 0001069157 ewbc:PerformanceBasedRestrictedStockSettledinStockMember ewbc:CliffVestingMember 2025-01-01 2025-09-30 0001069157 ewbc:TimeBasedRestrictedStockSettledinStockMember 2024-12-31 0001069157 ewbc:PerformanceBasedRestrictedStockSettledinStockMember 2024-12-31 0001069157 ewbc:TimeBasedRestrictedStockSettledinStockMember 2025-01-01 2025-09-30 0001069157 ewbc:PerformanceBasedRestrictedStockSettledinStockMember 2025-01-01 2025-09-30 0001069157 ewbc:TimeBasedRestrictedStockSettledinStockMember 2025-09-30 0001069157 ewbc:PerformanceBasedRestrictedStockSettledinStockMember 2025-09-30 0001069157 us-gaap:RestrictedStockUnitsRSUMember 2025-07-01 2025-09-30 0001069157 us-gaap:RestrictedStockUnitsRSUMember 2025-01-01 2025-09-30 0001069157 us-gaap:RestrictedStockUnitsRSUMember 2024-07-01 2024-09-30 0001069157 us-gaap:RestrictedStockUnitsRSUMember 2024-01-01 2024-09-30 0001069157 2025-01-22 0001069157 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2024-06-30 0001069157 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2024-06-30 0001069157 us-gaap:AccumulatedTranslationAdjustmentMember 2024-06-30 0001069157 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2024-07-01 2024-09-30 0001069157 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2024-07-01 2024-09-30 0001069157 us-gaap:AccumulatedTranslationAdjustmentMember 2024-07-01 2024-09-30 0001069157 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2024-09-30 0001069157 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2024-09-30 0001069157 us-gaap:AccumulatedTranslationAdjustmentMember 2024-09-30 0001069157 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2025-06-30 0001069157 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2025-06-30 0001069157 us-gaap:AccumulatedTranslationAdjustmentMember 2025-06-30 0001069157 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2025-07-01 2025-09-30 0001069157 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2025-07-01 2025-09-30 0001069157 us-gaap:AccumulatedTranslationAdjustmentMember 2025-07-01 2025-09-30 0001069157 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2025-09-30 0001069157 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2025-09-30 0001069157 us-gaap:AccumulatedTranslationAdjustmentMember 2025-09-30 0001069157 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2023-12-31 0001069157 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2023-12-31 0001069157 us-gaap:AccumulatedTranslationAdjustmentMember 2023-12-31 0001069157 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2024-01-01 2024-09-30 0001069157 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2024-01-01 2024-09-30 0001069157 us-gaap:AccumulatedTranslationAdjustmentMember 2024-01-01 2024-09-30 0001069157 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2024-12-31 0001069157 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2024-12-31 0001069157 us-gaap:AccumulatedTranslationAdjustmentMember 2024-12-31 0001069157 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2025-01-01 2025-09-30 0001069157 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2025-01-01 2025-09-30 0001069157 us-gaap:AccumulatedTranslationAdjustmentMember 2025-01-01 2025-09-30 0001069157 ewbc:ConsumerandBusinessBankingMember 2025-07-01 2025-09-30 0001069157 ewbc:CommercialBankingMember 2025-07-01 2025-09-30 0001069157 ewbc:TreasuryAndOtherMember 2025-07-01 2025-09-30 0001069157 ewbc:ConsumerandBusinessBankingMember 2025-09-30 0001069157 ewbc:CommercialBankingMember 2025-09-30 0001069157 ewbc:TreasuryAndOtherMember 2025-09-30 0001069157 ewbc:ConsumerandBusinessBankingMember 2024-07-01 2024-09-30 0001069157 ewbc:CommercialBankingMember 2024-07-01 2024-09-30 0001069157 ewbc:TreasuryAndOtherMember 2024-07-01 2024-09-30 0001069157 ewbc:ConsumerandBusinessBankingMember 2024-09-30 0001069157 ewbc:CommercialBankingMember 2024-09-30 0001069157 ewbc:TreasuryAndOtherMember 2024-09-30 0001069157 ewbc:ConsumerandBusinessBankingMember 2025-01-01 2025-09-30 0001069157 ewbc:CommercialBankingMember 2025-01-01 2025-09-30 0001069157 ewbc:TreasuryAndOtherMember 2025-01-01 2025-09-30 0001069157 ewbc:ConsumerandBusinessBankingMember 2024-01-01 2024-09-30 0001069157 ewbc:CommercialBankingMember 2024-01-01 2024-09-30 0001069157 ewbc:TreasuryAndOtherMember 2024-01-01 2024-09-30

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM  10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2025

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission file number  000-24939

EAST WEST BANCORP, INC.
(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction of incorporation or organization)

95-4703316
(I.R.S. Employer Identification No.)

135 North Los Robles Ave. , 7th Floor , Pasadena , California 91101
(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code:
( 626 )  768-6000

Securities registered pursuant to Section 12(b) of the Act:  

Title of each class Trading
Symbol(s) Name of each exchange
 on which registered
Common Stock, par value $0.001 per share EWBC The Nasdaq Global Select Market

    Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.
Yes ☒ No ☐

    Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).
Yes ☒ No ☐

    Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☒ Accelerated filer ☐

Non-accelerated filer ☐ Smaller reporting company ☐

Emerging growth company ☐

    If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

    Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).
Yes  ☐  No ☒
    Number of shares outstanding of the issuer’s common stock on the latest practicable date: 137,585,604 shares as of October 31, 2025 .

TABLE OF CONTENTS

Page
FORWARD-LOOKING S TATEMENTS
3

PART I — FINANCIAL INFORMATION
4

Item 1.
Consolidated Financial Statements
4

Consolidated Balance Sheets (Unaudited)
4

Consolidated Statement of Income (Unaudited)
5

Consolidated Statement of Comprehensive Income (Unaudited)
6

Consolidated Statement of Changes in Stockholders’ Equity (Unaudited)
7

Consolidated Statement of Cash Flows (Unaudited)
8

Notes to Consolidated Financial Statements (Unaudited)
10

   1 — Basis of Presentation, Current Accounting Developments, and Summary of Significant Accounting Policies Update
10

   2 — Fair Value Measurement and Fair Value of Financial Instruments
11

   3 — Securities Purchased under Resale Agreements and Sold under Repurchase Agreements
21

   4 — Securities
22

   5 — Derivatives
29

   6 — Loans Receivable and Allowance for Credit Losses
35

   7 — Affordable Housing Partnership, Tax Credit and Community Reinvestment Act Investments , Net
53

   8 — Goodwill
55

9 — Federal Home Loan Bank Advances and Long-Term Debt
55

10 — Commitments and Contingencies
55

11 — Stock Compensation Plans
57

12 — Stockholders’ Equity and Earnings Per Share
59

13 — Accumulated Other Comprehensive Income (Loss)
59

14 — Business Segments
61

Item 2.
Management’s Discussion and Analysis of Financial Condition and Results of Operations
65

Item 3.
Quantitative and Qualitative Disclosures About Market Risk
108

Item 4.
Controls and Procedures
108

PART II — OTHER INFORMATION
109

Item 1.
Legal Proceedings
109

Item 1A.
Risk Factors
109

Item 2.
Unregistered Sales of Equity Securities and Use of Proceeds
110

Item 5.
Other Information
110

Item 6.
Exhibits
111

GLOSSARY OF ACRONYMS
112

SIGNATURE
113

2

Forward-Looking Statements

Certain matters discussed in this Quarterly Report on Form 10-Q contain “forward-looking statements” that are intended to be covered by the safe harbor for such statements provided by the Private Securities Litigation Reform Act of 1995. East West Bancorp, Inc. (referred to herein on an unconsolidated basis as “East West” and on a consolidated basis as the “Company,” “we,” “our” or “EWBC”) may make forward-looking statements in other documents that it files with, or furnishes to, the United States (“U.S.”) Securities and Exchange Commission (“SEC”) and management may make forward-looking statements to analysts, investors, media members and others. Forward-looking statements are those that do not relate to historical facts and that are based on current assumptions, beliefs, estimates, expectations and projections, many of which, by their nature, are inherently uncertain and beyond the Company’s control. Forward-looking statements may relate to various matters, including the Company’s financial condition, results of operations, plans, objectives, future performance, business or industry, and usually can be identified by the use of forward-looking words such as “anticipates,” “assumes,” “believes,” “can,” “continues,” “could,” “estimates,” “expects,” “forecasts,” “goal,” “intends,” “likely,” “may,” “might,” “objective,” “plans,” “potential,” “projects,” “remains,” “should,” “target,” “trend,” “will,” “would,” or similar expressions or variations thereof, and the negative thereof, but these terms are not the exclusive means of identifying such statements. You should not place undue reliance on forward-looking statements, as they are subject to known and unknown risks and uncertainties.

Factors that might cause future results to differ materially from historical performance and any forward-looking statements include, but are not limited to:

• changes in local, regional and global business, economic and political conditions, and natural or geopolitical events;
• the soundness of other financial institutions and the impacts related to or resulting from bank failures and other industry volatility, including potential increased regulatory requirements, Federal Deposit Insurance Corporation insurance premiums and assessments, and deposit withdrawals;
• changes in trade, tariff, tax, monetary and fiscal policies;
• changes in immigration laws and enforcement practices, or travel and visa related policies;
• current or potential disputes between the U.S., the People’s Republic of China, Singapore and other countries;
• changes in the commercial and consumer real estate markets;
• changes in consumer or commercial spending, savings and borrowing habits, and patterns and behaviors;
• the Company’s ability to compete effectively against financial institutions and other entities, including as a result of emerging technologies;
• the success and timing of the Company’s business strategies;
• the Company’s ability to retain key officers and employees;
• changes in interest rates, competition, regulatory requirements and product mix;
• changes in the Company’s costs of operation, compliance and expansion;
• disruption, failure in, or breach of, the Company’s operational or security systems or infrastructure, or those of third-party vendors with which the Company does business, including as a result of cyber-attacks, and the disclosure or misuse of confidential information;
• the adequacy of the Company’s risk management framework;
• future credit quality and performance, including expectations regarding future credit losses and allowance levels;
• adverse changes to the Company’s credit ratings;
• legal proceedings, regulatory investigations and their resolution;
• the Company’s capital requirements and its ability to generate capital internally or raise capital on favorable terms;
• the impact on the Company’s liquidity due to changes in the Company’s ability to receive dividends from its subsidiaries; and
• any strategic acquisitions or divestitures, the introduction of new or expanded products and services or other events that may directly or indirectly result in a negative impact on the financial performance of the Company and its customers.

For a more detailed discussion of some of the factors that might cause such differences, see the Company’s Annual Report on Form 10-K for the year ended December 31, 2024, filed with the SEC on February 28, 2025 under the heading Item 1A. Risk Factors . You should treat forward-looking statements as speaking only as of the date they are made and based only on information then actually known to the Company. The Company does not undertake, and specifically disclaims any obligation to update or revise any forward-looking statements to reflect the occurrence of events or circumstances after the date of such statements except as required by law.
3

PART I — FINANCIAL INFORMATION
ITEM 1. CONSOLIDATED FINANCIAL STATEMENTS

EAST WEST BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS
($ in thousands, except shares)
(Unaudited)

September 30,
2025 December 31,
2024

ASSETS
Cash and due from banks $ 676,547   $ 360,734  
Interest-bearing cash with banks 4,017,647   4,890,008  
Cash and cash equivalents 4,694,194   5,250,742  
Interest-bearing deposits with banks 68,200   48,198  
Securities purchased under resale agreements (“resale agreements”) 425,000   425,000  
Debt securities:
Available-for-sale (“AFS”), at fair value (amortized cost of $ 13,189,313 and $ 11,505,775 )
12,741,152   10,846,811  
Held-to-maturity (“HTM”), at amortized cost (fair value of $ 2,467,362 and $ 2,387,754 )
2,880,682   2,917,413  

Loans held-for-sale 19,596   —  
Loans held-for-investment (net of allowance for loan and lease losses (“ALLL”) of $ 790,520 and $ 702,052 )
54,976,252   53,024,585  
Affordable housing partnership, tax credit and Community Reinvestment Act (“CRA”) investments, net 982,247   926,640  

Premises and equipment (net of accumulated depreciation of $ 172,491 and $ 166,154 )
78,615   82,233  

Operating lease right-of-use assets 77,855   81,967  
Goodwill 465,697   465,697  
Other assets 2,260,041   1,907,189  
TOTAL $ 79,669,531   $ 75,976,475  
LIABILITIES
Deposits:
Noninterest-bearing $ 16,141,954   $ 15,450,428  
Interest-bearing 50,445,602   47,724,595  
Total deposits 66,587,556   63,175,023  
Short-term borrowings 9,851   —  

Federal Home Loan Bank (“FHLB”) advances 3,000,000   3,500,000  
Securities sold under repurchase agreements (“repurchase agreements”)
53,489   —  
Long-term debt and finance lease liabilities 35,707   35,974  
Operating lease liabilities 83,998   89,263  
Accrued expenses and other liabilities 1,316,130   1,453,161  
Total liabilities 71,086,731   68,253,421  
COMMITMENTS AND CONTINGENCIES (Note 10)

STOCKHOLDERS’ EQUITY
Common stock, $ 0.001 par value, 200,000,000 shares authorized; 170,463,795 and 169,925,379 shares issued
170   170  
Additional paid-in capital 2,096,227   2,030,712  
Retained earnings 8,028,882   7,311,542  
Treasury stock, at cost 32,895,735 and 31,488,080 shares
( 1,166,922 ) ( 1,034,110 )
Accumulated other comprehensive loss (“AOCI”), net of tax ( 375,557 ) ( 585,260 )
Total stockholders’ equity 8,582,800   7,723,054  
TOTAL $ 79,669,531   $ 75,976,475  

See accompanying Notes to Consolidated Financial Statements.

4

EAST WEST BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF INCOME
($ and shares in thousands, except per share data)
(Unaudited)

Three Months Ended September 30, Nine Months Ended September 30,
2025 2024 2025 2024
INTEREST AND DIVIDEND INCOME
Loans receivable, including fees $ 919,518   $ 887,353   $ 2,625,625   $ 2,622,183  
Debt securities 158,562   123,983   460,134   311,107  

Resale agreements
1,616   1,663   4,850   9,663  
Restricted equity securities 2,866   2,840   8,682   7,129  
Interest-bearing cash and deposits with banks 47,170   60,060   121,242   183,848  
Total interest and dividend income 1,129,732   1,075,899   3,220,533   3,133,930  
INTEREST EXPENSE
Deposits 414,637   454,071   1,207,206   1,291,752  
Federal funds purchased and other short-term borrowings 3   16   10   42,154  
FHLB advances 36,740   48,261   114,919   104,840  
Repurchase agreements
148   49   1,577   142  
Long-term debt and finance lease liabilities 674   780   2,016   3,952  
Total interest expense 452,202   503,177   1,325,728   1,442,840  
Net interest income before provision for credit losses 677,530   572,722   1,894,805   1,691,090  
Provision for credit losses 36,000   42,000   130,000   104,000  
Net interest income after provision for credit losses 641,530   530,722   1,764,805   1,587,090  
NONINTEREST INCOME

Commercial and consumer deposit-related fees
28,409   26,815   82,349   77,412  
Lending and loan servicing fees
27,605   26,453   79,421   73,718  
Foreign exchange income 14,491   13,569   44,043   37,962  
Wealth management fees 14,562   10,683   38,966   28,798  
Customer derivative income (loss), net of mark-to-market adjustments
6,124   ( 706 ) 12,394   8,808  

Net gains on AFS debt securities 57   145   934   1,979  

Other investment income 705   2,800   3,645   6,201  
Other income 8,564   4,636   17,045   12,175  
Total noninterest income 100,517   84,395   278,797   247,053  
NONINTEREST EXPENSE
Compensation and employee benefits 175,585   135,464   466,861   410,864  
Occupancy and equipment expense 16,970   17,001   48,948   48,016  
Deposit account expense 8,851   12,229   27,241   36,467  
Computer and software related expenses 12,949   11,436   39,709   34,172  
Deposit insurance premiums and regulatory assessments 8,644   9,178   28,162   39,535  

Other operating expense 38,231   34,892   116,499   104,193  
Amortization of tax credit and CRA investments 15,693   5,600   57,671   34,859  

Total noninterest expense 276,923   225,800   785,091   708,106  
INCOME BEFORE INCOME TAXES 465,124   389,317   1,258,511   1,126,037  
Income tax expense
96,730   90,151   289,594   253,566  
NET INCOME $ 368,394   $ 299,166   $ 968,917   $ 872,471  
EARNINGS PER SHARE (“EPS”)
BASIC $ 2.68   $ 2.16   $ 7.03   $ 6.28  
DILUTED $ 2.65   $ 2.14   $ 6.97   $ 6.23  
WEIGHTED-AVERAGE NUMBER OF SHARES OUTSTANDING
BASIC 137,676   138,606   137,897   138,997  
DILUTED 138,942   139,648   139,090   139,939  

See accompanying Notes to Consolidated Financial Statements.

5

EAST WEST BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
($ in thousands)
(Unaudited)

Three Months Ended September 30, Nine Months Ended September 30,
2025 2024 2025 2024
Net income $ 368,394   $ 299,166   $ 968,917   $ 872,471  
Other comprehensive income, net of tax:

Net changes in unrealized gains on AFS debt securities
78,845   132,028   150,518   137,227  

Amortization of unrealized losses on debt securities transferred from AFS to HTM 4,102   2,765   8,015   8,161  
Net changes in unrealized gains on cash flow hedges
1,802   83,202   51,211   36,519  
Foreign currency translation adjustments 2,074   ( 1,126 ) ( 41 ) 1,385  
Other comprehensive income
86,823   216,869   209,703   183,292  
COMPREHENSIVE INCOME $ 455,217   $ 516,035   $ 1,178,620   $ 1,055,763  

See accompanying Notes to Consolidated Financial Statements.

6

EAST WEST BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY
($ in thousands, except shares and per share data)
(Unaudited)

Common Stock and Additional Paid-in Capital Retained Earnings Treasury Stock AOCI, Net of Tax Total Stockholders’ Equity
Shares Amount
BALANCE, JULY 1, 2024 138,604,437   $ 2,007,558   $ 6,873,653   $ ( 1,011,924 ) $ ( 654,173 ) $ 7,215,114  

Net income —  —  299,166   —  —  299,166  
Other comprehensive income —  —  —  —  216,869   216,869  
Issuance of common stock pursuant to various stock compensation plans and agreements 5,948   10,717   —  —  —  10,717  
Repurchase of common stock pursuant to various stock compensation plans and agreements ( 1,132 ) —  —  ( 95 ) —  ( 95 )

Cash dividends on common stock ($ 0.55 per share)
—  —  ( 77,232 ) —  —  ( 77,232 )
BALANCE, SEPTEMBER 30, 2024 138,609,253   $ 2,018,275   $ 7,095,587   $ ( 1,012,019 ) $ ( 437,304 ) $ 7,664,539  
BALANCE, JULY 1, 2025 137,816,091   $ 2,060,285   $ 7,744,221   $ ( 1,140,359 ) $ ( 462,380 ) $ 8,201,767  

Net income —  —  368,394   —  —  368,394  
Other comprehensive income —  —  —  —  86,823   86,823  
Issuance of common stock pursuant to various stock compensation plans and agreements 18,337   36,112   —  —  —  36,112  
Repurchase of common stock pursuant to various stock compensation plans and agreements ( 8,608 ) —  —  ( 896 ) —  ( 896 )
Repurchase of common stock pursuant to the stock repurchase program ( 257,760 ) —  —  ( 25,667 ) —  ( 25,667 )
Cash dividends on common stock ($ 0.60 per share)
—  —  ( 83,733 ) —  —  ( 83,733 )
BALANCE, SEPTEMBER 30, 2025 137,568,060   $ 2,096,397   $ 8,028,882   $ ( 1,166,922 ) $ ( 375,557 ) $ 8,582,800  

Common Stock and Additional Paid-in Capital Retained Earnings Treasury Stock AOCI, Net of Tax Total Stockholders’ Equity
Shares Amount
BALANCE, JANUARY 1, 2024 140,027,367   $ 1,980,987   $ 6,465,230   $ ( 874,787 ) $ ( 620,596 ) $ 6,950,834  
Cumulative-effect of change in accounting principle (1)
—  —  ( 9,482 ) —  —  ( 9,482 )
Net income —  —  872,471   —  —  872,471  
Other comprehensive income
—  —  —  —  183,292   183,292  

Issuance of common stock pursuant to various stock compensation plans and agreements 516,125   37,288   —  —  —  37,288  
Repurchase of common stock pursuant to various stock compensation plans and agreements ( 191,743 ) —  —  ( 14,011 ) —  ( 14,011 )
Repurchase of common stock pursuant to the stock repurchase program ( 1,742,496 ) —  —  ( 123,221 ) ( 123,221 )
Cash dividends on common stock ($ 1.65 per share)
—  —  ( 232,632 ) —  —  ( 232,632 )
BALANCE, SEPTEMBER 30, 2024 138,609,253   $ 2,018,275   $ 7,095,587   $ ( 1,012,019 ) $ ( 437,304 ) $ 7,664,539  
BALANCE, JANUARY 1, 2025 138,437,299   $ 2,030,882   $ 7,311,542   $ ( 1,034,110 ) $ ( 585,260 ) $ 7,723,054  

Net income —  —  968,917   —  —  968,917  
Other comprehensive income
—  —  —  —  209,703   209,703  

Issuance of common stock pursuant to various stock compensation plans and agreements 538,416   65,515   —  —  —  65,515  
Repurchase of common stock pursuant to various stock compensation plans and agreements ( 205,559 ) —  —  ( 18,933 ) —  ( 18,933 )
Repurchase of common stock pursuant to the stock repurchase program ( 1,202,096 ) —  —  ( 113,879 ) —  ( 113,879 )
Cash dividends on common stock ($ 1.80 per share)
—  —  ( 251,577 ) —  —  ( 251,577 )
BALANCE, SEPTEMBER 30, 2025 137,568,060   $ 2,096,397   $ 8,028,882   $ ( 1,166,922 ) $ ( 375,557 ) $ 8,582,800  

(1) 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.
See accompanying Notes to Consolidated Financial Statements.

7

EAST WEST BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF CASH FLOWS
($ in thousands)
(Unaudited)

Nine Months Ended September 30,
2025 2024
CASH FLOWS FROM OPERATING ACTIVITIES
Net income $ 968,917   $ 872,471  
Adjustments to reconcile net income to net cash provided by operating activities:
   
Provision for credit losses 130,000   104,000  
Depreciation, amortization and accretion, net
158,939   150,468  

Stock compensation costs 62,592   34,371  
Deferred income tax benefit
( 26,147 ) ( 12,780 )

Net gains on AFS debt securities ( 934 ) ( 1,979 )
Net loss on other real estate owned (“OREO”) write-downs and sales 4,426   2,250  

Loans held-for-sale:
Originations and purchases
( 3,269 ) ( 2,491 )
Proceeds from sales and paydowns/payoffs of loans originally classified as held-for-sale 3,266   2,629  

Net change in accrued interest receivable and other assets ( 331,075 ) 58,797  
Net change in accrued expenses and other liabilities ( 173,587 ) ( 295,554 )
Other operating activities, net ( 4,836 ) ( 648 )
Total adjustments ( 180,625 ) 39,063  
Net cash provided by operating activities 788,292   911,534  
CASH FLOWS FROM INVESTING ACTIVITIES    
Net increase in:
   
Affordable housing partnership, tax credit and CRA investments ( 265,527 ) ( 224,828 )
Interest-bearing deposits with banks ( 19,476 ) ( 105,275 )

AFS debt securities:
Proceeds from sales 606,685   1,361,386  
Proceeds from repayments, maturities and redemptions 2,566,741   1,073,539  
Purchases ( 4,877,885 ) ( 6,158,520 )

Loans held-for-investment:
Proceeds from sales of loans originally classified as held-for-investment 251,012   702,564  
Purchases ( 709,194 ) ( 741,188 )
Other changes in loans held-for-investment, net ( 1,575,591 ) ( 1,038,818 )

Proceeds from sales of OREO
30,939   24,550  

Proceeds from paydowns and maturities of resale agreements —   360,000  
Proceeds from repayments, maturities and redemptions of HTM debt securities 48,409   39,401  
Redemption (purchases) of FHLB stock, net
13,888   ( 84,050 )
Other investing activities, net 8,567   11,687  
Net cash used in investing activities ( 3,921,432 ) ( 4,779,552 )

See accompanying Notes to Consolidated Financial Statements.

8

EAST WEST BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF CASH FLOWS
($ in thousands)
(Unaudited)
(Continued)

Nine Months Ended September 30,
2025 2024
CASH FLOWS FROM FINANCING ACTIVITIES    
Net change in deposits 3,412,410   5,591,371  
Net change in short-term borrowings 9,847   ( 4,500,000 )

FHLB advances:
Proceeds
2,500,000   4,000,000  
Repayments ( 3,000,000 ) ( 500,000 )

Net change in repurchase agreements
53,489   —  

Repayment of lease liabilities and junior subordinated debt
( 627 ) ( 117,226 )
Common stock:
Proceeds from issuance pursuant to various stock compensation plans and agreements 1,721   1,580  
Stock tendered for payment of withholding taxes ( 18,974 ) ( 14,011 )
Repurchase of common stock pursuant to the stock repurchase program ( 114,548 ) ( 123,221 )
Cash dividends paid ( 251,439 ) ( 232,132 )
Net cash provided by financing activities
2,591,879   4,106,361  
Effect of exchange rate changes on cash and cash equivalents ( 15,287 ) 6,746  
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS
( 556,548 ) 245,089  
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 5,250,742   4,614,984  
CASH AND CASH EQUIVALENTS, END OF PERIOD $ 4,694,194   $ 4,860,073  

SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid during the period for:
Interest $ 1,330,970   $ 1,584,127  
Income taxes, net $ 263,995   $ 241,491  
Noncash investing and financing activities:

Loans transferred from held-for-investment to held-for-sale $ 270,451   $ 646,797  

Loans transferred to OREO
$ 25,506   $ 67,379  

See accompanying Notes to Consolidated Financial Statements.

9

EAST WEST BANCORP, INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Unaudited)

Note 1 — Basis of Presentation, Current Accounting Developments and Summary of Significant Accounting Policies Update

East West Bancorp, Inc. (referred to herein on an unconsolidated basis as “East West” and on a consolidated basis as the “Company,” “we,” “our” or “EWBC”) 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 unaudited interim Consolidated Financial Statements in this Quarterly Report on Form 10-Q (this “Form 10-Q”) include the accounts of East West, East West Bank and East West’s subsidiaries. All i ntercompany balances and transactions have been eliminated in consolidation. As of September 30, 2025, 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.

The unaudited interim Consolidated Financial Statements are presented in accordance with United States (“U.S.”) Generally Accepted Accounting Principles (“GAAP”), applicable guidelines prescribed by regulatory authorities and general practices in the banking industry. While the unaudited interim Consolidated Financial Statements reflect all adjustments that, in the opinion of management, are necessary for fair presentation, they primarily serve to update the Company’s Annual Report on Form 10-K for the year ended December 31, 2024, filed with the U.S. SEC on February 28, 2025 (the “Company’s 2024 Form 10-K”), and may not include all the information and notes necessary to constitute a complete set of financial statements. Accordingly, they should be read in conjunction with the audited Consolidated Financial Statements and notes thereto included in the Company’s 2024 Form 10-K.

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 periods, and the related disclosures. Although our estimates consider current conditions and how we expect them to change in the future, it is reasonably possible that actual results could be materially different from those estimates. Hence, the current period’s results of operations are not necessarily indicative of results that may be expected for any future interim period or for the year as a whole. Certain items on the Consolidated Financial Statements and notes for the prior periods have been reclassified to conform to the current presentation. Events subsequent to the Consolidated Balance Sheet date have been evaluated through the date the Consolidated Financial Statements are issued for inclusion in the accompanying Consolidated Financial Statements.

New Accounting Pronouncements Adopted

The following standards were adopted on January 1, 2025, but they did not have a material impact on the Company’s Consolidated Financial Statements:

• Accounting Standards Update (“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

10

Significant Accounting Policies Update

Stock-Based Compensation — The Company recognizes compensation expense related to stock awards over the requisite service period, generally based on the instruments’ grant-date fair value, reduced by expected forfeitures. Effective third quarter 2025, compensation cost related to awards granted to employees who meet certain age plus years-of-service requirements (“retirement-eligible employees”) is accrued over the service period required to earn the award prior to the grant date, in accordance with ASC 718-10-55-108. This change in the timing of recognition for awards that were granted to or are expected to be granted to retirement-eligible employees resulted in $ 27 million of additional compensation expense during the three months ended September 30, 2025. For more information on the Company’s accounting policies related to stock-based compensation, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Stock-Based Compensation to the Consolidated Financial Statements of the Company’s 2024 Form 10-K.

Note 2 — 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. At times, 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 the Company’s 2024 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 that 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.

11