00010691572024FYfalsehttp://fasb.org/us-gaap/2024#AccountingStandardsUpdate202202Memberhttp://fasb.org/us-gaap/2024#AccountingStandardsUpdate202302Memberhttp://www.eastwestbank.com/20241231#LendingFeeshttp://www.eastwestbank.com/20241231#LendingFeeshttp://www.eastwestbank.com/20241231#LendingFeeshttp://fasb.org/us-gaap/2024#OtherAssetshttp://fasb.org/us-gaap/2024#AccruedLiabilitiesAndOtherLiabilitieshttp://fasb.org/us-gaap/2024#OtherAssetshttp://fasb.org/us-gaap/2024#AccruedLiabilitiesAndOtherLiabilitieshttp://fasb.org/us-gaap/2024#IncomeTaxExpenseBenefithttp://fasb.org/us-gaap/2024#IncomeTaxExpenseBenefithttp://fasb.org/us-gaap/2024#IncomeTaxExpenseBenefithttp://fasb.org/us-gaap/2024#IncomeTaxExpenseBenefithttp://fasb.org/us-gaap/2024#IncomeTaxExpenseBenefithttp://fasb.org/us-gaap/2024#IncomeTaxExpenseBenefit288iso4217:USDxbrli:sharesiso4217:USDxbrli:sharesewbc:locationewbc:trustewbc:segmentxbrli:pureewbc:securityutr:Boeutr:MMBTUewbc:companyewbc:loanutr:Qewbc:quarter00010691572024-01-012024-12-3100010691572024-06-2800010691572025-01-3100010691572024-12-3100010691572023-12-3100010691572023-01-012023-12-3100010691572022-01-012022-12-310001069157us-gaap:CommonStockMember2021-12-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2021-12-310001069157us-gaap:RetainedEarningsMember2021-12-310001069157us-gaap:TreasuryStockCommonMember2021-12-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-12-3100010691572021-12-310001069157us-gaap:RetainedEarningsMember2022-01-012022-12-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-01-012022-12-310001069157us-gaap:CommonStockMember2022-01-012022-12-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2022-01-012022-12-310001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:CommonStockMember2022-01-012022-12-310001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:TreasuryStockCommonMember2022-01-012022-12-310001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember2022-01-012022-12-310001069157ewbc:StockRepurchasePlanMemberus-gaap:CommonStockMember2022-01-012022-12-310001069157ewbc:StockRepurchasePlanMemberus-gaap:TreasuryStockCommonMember2022-01-012022-12-310001069157ewbc:StockRepurchasePlanMember2022-01-012022-12-310001069157us-gaap:CommonStockMember2022-12-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2022-12-310001069157us-gaap:RetainedEarningsMember2022-12-310001069157us-gaap:TreasuryStockCommonMember2022-12-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-12-3100010691572022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:RetainedEarningsMember2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2022-12-310001069157us-gaap:RetainedEarningsMember2023-01-012023-12-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-01-012023-12-310001069157us-gaap:CommonStockMember2023-01-012023-12-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2023-01-012023-12-310001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:CommonStockMember2023-01-012023-12-310001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:TreasuryStockCommonMember2023-01-012023-12-310001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember2023-01-012023-12-310001069157ewbc:StockRepurchasePlanMemberus-gaap:CommonStockMember2023-01-012023-12-310001069157ewbc:StockRepurchasePlanMemberus-gaap:TreasuryStockCommonMember2023-01-012023-12-310001069157ewbc:StockRepurchasePlanMember2023-01-012023-12-310001069157us-gaap:CommonStockMember2023-12-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2023-12-310001069157us-gaap:RetainedEarningsMember2023-12-310001069157us-gaap:TreasuryStockCommonMember2023-12-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:RetainedEarningsMember2023-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2023-12-310001069157us-gaap:RetainedEarningsMember2024-01-012024-12-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-01-012024-12-310001069157us-gaap:CommonStockMember2024-01-012024-12-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2024-01-012024-12-310001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:CommonStockMember2024-01-012024-12-310001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:TreasuryStockCommonMember2024-01-012024-12-310001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember2024-01-012024-12-310001069157ewbc:StockRepurchasePlanMemberus-gaap:CommonStockMember2024-01-012024-12-310001069157ewbc:StockRepurchasePlanMemberus-gaap:TreasuryStockCommonMember2024-01-012024-12-310001069157ewbc:StockRepurchasePlanMember2024-01-012024-12-310001069157us-gaap:CommonStockMember2024-12-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2024-12-310001069157us-gaap:RetainedEarningsMember2024-12-310001069157us-gaap:TreasuryStockCommonMember2024-12-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-12-310001069157us-gaap:BuildingMember2024-12-310001069157ewbc:FurnitureFixturesAndEquipmentMember2024-12-310001069157us-gaap:CustomerConcentrationRiskMemberewbc:ServiceChargesDepositAccountFeesCardIncomeAndWealthManagmentFeesMemberus-gaap:SalesRevenueNetMember2024-01-012024-12-310001069157us-gaap:CustomerConcentrationRiskMemberewbc:ServiceChargesDepositAccountFeesCardIncomeAndWealthManagmentFeesMemberus-gaap:SalesRevenueNetMember2023-01-012023-12-310001069157us-gaap:CustomerConcentrationRiskMemberewbc:ServiceChargesDepositAccountFeesCardIncomeAndWealthManagmentFeesMemberus-gaap:SalesRevenueNetMember2022-01-012022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate202302Member2023-12-310001069157us-gaap:CommonStockMemberewbc:VisaB1Member2024-04-080001069157us-gaap:CommonStockMemberewbc:VisaB2Member2024-04-080001069157us-gaap:CommonStockMemberewbc:VisaCMember2024-04-080001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:VisaCMember2024-12-310001069157ewbc:RayliantGlobalAdvisorsLimitedMember2023-09-300001069157ewbc:RayliantGlobalAdvisorsLimitedMember2023-07-012023-09-300001069157ewbc:RayliantGlobalAdvisorsLimitedMemberewbc:PerformanceBasedRestrictedStockUnitsMembersrt:MinimumMember2023-07-012023-09-300001069157ewbc:RayliantGlobalAdvisorsLimitedMemberewbc:PerformanceBasedRestrictedStockUnitsMembersrt:MaximumMember2023-07-012023-09-300001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:ForeignGovernmentBondsMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:ForeignGovernmentBondsMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:ForeignGovernmentBondsMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:ForeignGovernmentBondsMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignExchangeContractMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CreditRiskContractMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommodityContractMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:ForeignGovernmentBondsMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:ForeignGovernmentBondsMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberewbc:ForeignGovernmentBondsMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:ForeignGovernmentBondsMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignExchangeContractMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CreditRiskContractMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommodityContractMember2023-12-310001069157us-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2024-12-310001069157us-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2024-01-012024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-01-012023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2022-01-012022-12-310001069157us-gaap:FairValueMeasurementsRecurringMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:MeasurementInputPriceVolatilityMemberewbc:BlackScholesOptionPricingModelMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMembersrt:MaximumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:MeasurementInputPriceVolatilityMemberewbc:BlackScholesOptionPricingModelMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:MeasurementInputPriceVolatilityMemberewbc:BlackScholesOptionPricingModelMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberewbc:BlackScholesOptionPricingModelMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberewbc:BlackScholesOptionPricingModelMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberewbc:PayoutDesignatedBasedOnOperatingRevenueAndOperatingEBITDAOfInvesteeMemberewbc:InternalModelMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberewbc:PayoutDesignatedBasedOnOperatingRevenueAndOperatingEBITDAOfInvesteeMemberewbc:InternalModelMember2024-12-310001069157us-gaap:FairValueMeasurementsRecurringMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:MeasurementInputPriceVolatilityMemberewbc:BlackScholesOptionPricingModelMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMembersrt:MaximumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:MeasurementInputPriceVolatilityMemberewbc:BlackScholesOptionPricingModelMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:MeasurementInputPriceVolatilityMemberewbc:BlackScholesOptionPricingModelMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberewbc:BlackScholesOptionPricingModelMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberewbc:BlackScholesOptionPricingModelMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberewbc:PayoutDesignatedBasedOnOperatingRevenueAndOperatingEBITDAOfInvesteeMemberewbc:InternalModelMember2023-12-310001069157us-gaap:FairValueMeasurementsRecurringMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMemberewbc:PayoutDesignatedBasedOnOperatingRevenueAndOperatingEBITDAOfInvesteeMemberewbc:InternalModelMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:CommercialAndIndustrialLoanMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:CommercialAndIndustrialLoanMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:CommercialAndIndustrialLoanMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:CommercialAndIndustrialLoanMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ConstructionAndLandLoanMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ConstructionAndLandLoanMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ConstructionAndLandLoanMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ConstructionAndLandLoanMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2024-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMembersrt:SingleFamilyMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMembersrt:SingleFamilyMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMembersrt:SingleFamilyMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMembersrt:SingleFamilyMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2024-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:ConsumerPortfolioSegmentMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsNonrecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2024-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ValuationTechniqueIndividualAnalysisMemberewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherRealEstateOwnedMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherRealEstateOwnedMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherRealEstateOwnedMember2024-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherRealEstateOwnedMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:CommercialAndIndustrialLoanMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:CommercialAndIndustrialLoanMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:CommercialAndIndustrialLoanMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:CommercialAndIndustrialLoanMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2023-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:HomeEquityMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:HomeEquityMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:HomeEquityMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:HomeEquityMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2023-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsNonrecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2023-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2023-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:LoansReceivableMember2024-01-012024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:LoansReceivableMember2023-01-012023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:LoansReceivableMember2022-01-012022-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMemberus-gaap:LoansReceivableMember2024-01-012024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMemberus-gaap:LoansReceivableMember2023-01-012023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMemberus-gaap:LoansReceivableMember2022-01-012022-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ConstructionAndLandLoanMemberus-gaap:LoansReceivableMember2024-01-012024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ConstructionAndLandLoanMemberus-gaap:LoansReceivableMember2023-01-012023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ConstructionAndLandLoanMemberus-gaap:LoansReceivableMember2022-01-012022-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:TotalCommercialRealEstateMemberus-gaap:LoansReceivableMember2024-01-012024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:TotalCommercialRealEstateMemberus-gaap:LoansReceivableMember2023-01-012023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:TotalCommercialRealEstateMemberus-gaap:LoansReceivableMember2022-01-012022-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:LoansReceivableMember2024-01-012024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:LoansReceivableMember2023-01-012023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:LoansReceivableMember2022-01-012022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMembersrt:SingleFamilyMemberus-gaap:LoansReceivableMember2024-01-012024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMembersrt:SingleFamilyMemberus-gaap:LoansReceivableMember2023-01-012023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMembersrt:SingleFamilyMemberus-gaap:LoansReceivableMember2022-01-012022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:HomeEquityMemberus-gaap:LoansReceivableMember2024-01-012024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:HomeEquityMemberus-gaap:LoansReceivableMember2023-01-012023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:HomeEquityMemberus-gaap:LoansReceivableMember2022-01-012022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:TotalResidentialMortgageMemberus-gaap:LoansReceivableMember2024-01-012024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:TotalResidentialMortgageMemberus-gaap:LoansReceivableMember2023-01-012023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:TotalResidentialMortgageMemberus-gaap:LoansReceivableMember2022-01-012022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:LoansReceivableMember2024-01-012024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:LoansReceivableMember2023-01-012023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:LoansReceivableMember2022-01-012022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:LoansReceivableMember2024-01-012024-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:LoansReceivableMember2023-01-012023-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:LoansReceivableMember2022-01-012022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2024-01-012024-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2023-01-012023-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2022-01-012022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherRealEstateOwnedMember2024-01-012024-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherRealEstateOwnedMember2023-01-012023-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherRealEstateOwnedMember2022-01-012022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherNonperformingAssetsMember2024-01-012024-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherNonperformingAssetsMember2023-01-012023-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherNonperformingAssetsMember2022-01-012022-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMember2024-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ValuationTechniqueFairValueOfCollateralContractValueMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember2024-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember2024-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMembersrt:MaximumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember2024-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberewbc:OtherRealEstateOwnedMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMember2023-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMember2023-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMembersrt:MaximumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMember2023-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ValuationTechniqueFairValueOfCollateralContractValueMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember2023-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:ValuationTechniqueIndividualAnalysisMemberewbc:AffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2023-12-310001069157us-gaap:CarryingReportedAmountFairValueDisclosureMember2024-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2024-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2024-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2024-12-310001069157us-gaap:EstimateOfFairValueFairValueDisclosureMember2024-12-310001069157us-gaap:CarryingReportedAmountFairValueDisclosureMember2023-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2023-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2023-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2023-12-310001069157us-gaap:EstimateOfFairValueFairValueDisclosureMember2023-12-310001069157us-gaap:USTreasurySecuritiesMember2024-12-310001069157us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2024-12-310001069157ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2024-12-310001069157ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2024-12-310001069157us-gaap:USStatesAndPoliticalSubdivisionsMember2024-12-310001069157us-gaap:CommercialMortgageBackedSecuritiesMember2024-12-310001069157us-gaap:ResidentialMortgageBackedSecuritiesMember2024-12-310001069157us-gaap:CorporateDebtSecuritiesMember2024-12-310001069157ewbc:ForeignGovernmentBondsMember2024-12-310001069157us-gaap:AssetBackedSecuritiesMember2024-12-310001069157us-gaap:CollateralizedLoanObligationsMember2024-12-310001069157us-gaap:USTreasurySecuritiesMember2023-12-310001069157us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2023-12-310001069157ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-12-310001069157ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-12-310001069157us-gaap:USStatesAndPoliticalSubdivisionsMember2023-12-310001069157us-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001069157us-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001069157us-gaap:CorporateDebtSecuritiesMember2023-12-310001069157ewbc:ForeignGovernmentBondsMember2023-12-310001069157us-gaap:AssetBackedSecuritiesMember2023-12-310001069157us-gaap:CollateralizedLoanObligationsMember2023-12-310001069157ewbc:MortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2024-12-310001069157ewbc:NonAgencyMortgageBackedSecuritiesMember2024-12-310001069157ewbc:MortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-12-310001069157ewbc:NonAgencyMortgageBackedSecuritiesMember2023-12-310001069157us-gaap:AssetPledgedAsCollateralMember2024-12-310001069157us-gaap:AssetPledgedAsCollateralMember2023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NondesignatedMemberewbc:LondonClearingHouseChicagoMercantileExchangeMember2024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NondesignatedMemberewbc:LondonClearingHouseChicagoMercantileExchangeMember2023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2023-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2024-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2023-12-310001069157us-gaap:DesignatedAsHedgingInstrumentMember2024-12-310001069157us-gaap:DesignatedAsHedgingInstrumentMember2023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2023-12-310001069157us-gaap:CommodityContractMemberus-gaap:NondesignatedMember2024-12-310001069157us-gaap:CommodityContractMemberus-gaap:NondesignatedMember2023-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMember2024-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMember2023-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:NondesignatedMember2024-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:NondesignatedMember2023-12-310001069157us-gaap:EquityContractMemberus-gaap:NondesignatedMember2024-12-310001069157us-gaap:EquityContractMemberus-gaap:NondesignatedMember2023-12-310001069157us-gaap:NondesignatedMember2024-12-310001069157us-gaap:NondesignatedMember2023-12-310001069157srt:CrudeOilMemberus-gaap:NondesignatedMember2024-01-012024-12-310001069157srt:NaturalGasReservesMemberus-gaap:NondesignatedMember2024-01-012024-12-310001069157srt:CrudeOilMemberus-gaap:NondesignatedMember2023-01-012023-12-310001069157srt:NaturalGasReservesMemberus-gaap:NondesignatedMember2023-01-012023-12-310001069157ewbc:EquityPrivateCompaniesMemberus-gaap:NondesignatedMember2024-12-310001069157ewbc:EquityPublicCompaniesMemberus-gaap:NondesignatedMember2024-12-310001069157ewbc:EquityPrivateCompaniesMemberus-gaap:NondesignatedMember2023-12-310001069157ewbc:EquityPublicCompaniesMemberus-gaap:NondesignatedMember2023-12-310001069157ewbc:RayliantGlobalAdvisorsLimitedMemberus-gaap:NondesignatedMemberewbc:PerformanceBasedRestrictedStockSettledinStockMember2024-12-310001069157ewbc:RayliantGlobalAdvisorsLimitedMemberus-gaap:NondesignatedMemberewbc:PerformanceBasedRestrictedStockSettledinStockMember2023-12-310001069157ewbc:CommercialBankingMemberus-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2024-01-012024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2023-01-012023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2022-01-012022-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestExpenseMember2024-01-012024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestExpenseMember2023-01-012023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestExpenseMember2022-01-012022-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestIncomeMember2024-01-012024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestIncomeMember2023-01-012023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestIncomeMember2022-01-012022-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMemberewbc:NoninterestIncomeMember2024-01-012024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMemberewbc:NoninterestIncomeMember2023-01-012023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMemberewbc:NoninterestIncomeMember2022-01-012022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2024-01-012024-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2023-01-012023-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2022-01-012022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMembersrt:MaximumMember2023-01-012023-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMembersrt:MaximumMember2024-01-012024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:SwapMember2024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:SwapMember2023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:WrittenOptionMember2024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:WrittenOptionMember2023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:CollarsandCorridorsMember2024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:CollarsandCorridorsMember2023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:ForwardAndSpotMember2024-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:ForwardAndSpotMember2023-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:SwapMember2024-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:SwapMember2023-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:PurchasedOptionsMember2024-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:PurchasedOptionsMember2023-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2024-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-12-310001069157us-gaap:NotDesignatedAsHedgingInstrumentTradingMember2024-12-310001069157us-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:PurchasedOptionsMember2024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:PurchasedOptionsMember2023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:CollarsandCorridorsMember2024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:CollarsandCorridorsMember2023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:ForwardAndSpotMember2024-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:ForwardAndSpotMember2023-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2024-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2023-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:WrittenOptionMember2024-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:WrittenOptionMember2023-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2024-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-12-310001069157us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2024-12-310001069157us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:SwapMember2024-01-012024-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:SwapMember2024-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:SwapMember2023-01-012023-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:SwapMember2023-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:CollarsMember2024-01-012024-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:CollarsMember2024-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:CollarsMember2023-01-012023-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:CollarsMember2023-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2024-01-012024-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2024-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-01-012023-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:SwapMember2024-01-012024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:SwapMember2024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:SwapMember2023-01-012023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:SwapMember2023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:CollarsMember2024-01-012024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:CollarsMember2024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:CollarsMember2023-01-012023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:CollarsMember2023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:WrittenOptionMember2024-01-012024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:WrittenOptionMember2024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:WrittenOptionMember2023-01-012023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberewbc:WrittenOptionMember2023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2024-01-012024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-01-012023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-12-310001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2024-12-310001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2024-01-012024-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2024-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2023-01-012023-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2023-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:CollarsMember2024-01-012024-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:CollarsMember2024-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:CollarsMember2023-01-012023-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:CollarsMember2023-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2024-01-012024-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2024-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-01-012023-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2024-01-012024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2023-01-012023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:CollarsMember2024-01-012024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:CollarsMember2024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:CollarsMember2023-01-012023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:CollarsMember2023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:PurchasedOptionsMember2024-01-012024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:PurchasedOptionsMember2024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:PurchasedOptionsMember2023-01-012023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:PurchasedOptionsMember2023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2024-01-012024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2024-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-01-012023-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-12-310001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2024-12-310001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:ShortMemberus-gaap:NondesignatedMember2024-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:ShortMemberus-gaap:NondesignatedMember2023-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:LongMemberus-gaap:NondesignatedMember2024-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:LongMemberus-gaap:NondesignatedMember2023-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:ShortMemberus-gaap:NondesignatedMember2024-01-012024-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:ShortMemberus-gaap:NondesignatedMember2023-01-012023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NondesignatedMemberewbc:CustomerDerivativeIncomeMember2024-01-012024-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NondesignatedMemberewbc:CustomerDerivativeIncomeMember2023-01-012023-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NondesignatedMemberewbc:CustomerDerivativeIncomeMember2022-01-012022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMemberus-gaap:ForeignCurrencyGainLossMember2024-01-012024-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMemberus-gaap:ForeignCurrencyGainLossMember2023-01-012023-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMemberus-gaap:ForeignCurrencyGainLossMember2022-01-012022-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:NondesignatedMemberewbc:CustomerDerivativeIncomeMember2024-01-012024-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:NondesignatedMemberewbc:CustomerDerivativeIncomeMember2023-01-012023-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:NondesignatedMemberewbc:CustomerDerivativeIncomeMember2022-01-012022-12-310001069157us-gaap:EquityContractMemberus-gaap:NondesignatedMemberewbc:LendingFeesMember2024-01-012024-12-310001069157us-gaap:EquityContractMemberus-gaap:NondesignatedMemberewbc:LendingFeesMember2023-01-012023-12-310001069157us-gaap:EquityContractMemberus-gaap:NondesignatedMemberewbc:LendingFeesMember2022-01-012022-12-310001069157us-gaap:CommodityContractMemberus-gaap:NondesignatedMemberewbc:CustomerDerivativeIncomeMember2024-01-012024-12-310001069157us-gaap:CommodityContractMemberus-gaap:NondesignatedMemberewbc:CustomerDerivativeIncomeMember2023-01-012023-12-310001069157us-gaap:CommodityContractMemberus-gaap:NondesignatedMemberewbc:CustomerDerivativeIncomeMember2022-01-012022-12-310001069157us-gaap:NondesignatedMember2024-01-012024-12-310001069157us-gaap:NondesignatedMember2023-01-012023-12-310001069157us-gaap:NondesignatedMember2022-01-012022-12-310001069157ewbc:CreditRiskRelatedContingentFeaturesMember2024-12-310001069157ewbc:CreditRiskRelatedContingentFeaturesMember2023-12-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2024-12-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001069157srt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2024-12-310001069157srt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2024-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001069157ewbc:TotalCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-12-310001069157ewbc:TotalCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMember2023-12-310001069157srt:SingleFamilyMemberus-gaap:ConsumerPortfolioSegmentMember2024-12-310001069157srt:SingleFamilyMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2024-12-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001069157ewbc:TotalResidentialMortgageMemberus-gaap:ConsumerPortfolioSegmentMember2024-12-310001069157ewbc:TotalResidentialMortgageMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2024-12-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberewbc:CommercialAndIndustrialLoanMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CriticizedAccrualMemberewbc:CommercialAndIndustrialLoanMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CriticizedNonaccrualMemberewbc:CommercialAndIndustrialLoanMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:GrossWriteoffMemberewbc:CommercialAndIndustrialLoanMember2024-01-012024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:CommercialRealEstateMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CriticizedAccrualMemberus-gaap:CommercialRealEstateMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CriticizedNonaccrualMemberus-gaap:CommercialRealEstateMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:GrossWriteoffMemberus-gaap:CommercialRealEstateMember2024-01-012024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMembersrt:MultifamilyMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CriticizedAccrualMembersrt:MultifamilyMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CriticizedNonaccrualMembersrt:MultifamilyMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:GrossWriteoffMembersrt:MultifamilyMember2024-01-012024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberewbc:ConstructionAndLandLoanMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CriticizedNonaccrualMemberewbc:ConstructionAndLandLoanMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:GrossWriteoffMemberewbc:ConstructionAndLandLoanMember2024-01-012024-12-310001069157ewbc:TotalCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:GrossWriteoffMember2024-01-012024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PassMembersrt:SingleFamilyMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedAccrualMembersrt:SingleFamilyMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedNonaccrualMembersrt:SingleFamilyMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:GrossWriteoffMembersrt:SingleFamilyMember2024-01-012024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PassMemberus-gaap:HomeEquityMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedAccrualMemberus-gaap:HomeEquityMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedNonaccrualMemberus-gaap:HomeEquityMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:GrossWriteoffMemberus-gaap:HomeEquityMember2024-01-012024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:GrossWriteoffMemberewbc:TotalResidentialMortgageMember2024-01-012024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PassMemberewbc:OtherConsumerMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedNonaccrualMemberewbc:OtherConsumerMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:GrossWriteoffMemberewbc:OtherConsumerMember2024-01-012024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:GrossWriteoffMember2024-01-012024-12-310001069157us-gaap:PassMember2024-12-310001069157ewbc:CriticizedAccrualMember2024-12-310001069157ewbc:CriticizedNonaccrualMember2024-12-310001069157ewbc:GrossWriteoffMember2024-01-012024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberewbc:CommercialAndIndustrialLoanMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CriticizedAccrualMemberewbc:CommercialAndIndustrialLoanMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CriticizedNonaccrualMemberewbc:CommercialAndIndustrialLoanMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:GrossWriteoffMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:CommercialRealEstateMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CriticizedAccrualMemberus-gaap:CommercialRealEstateMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CriticizedNonaccrualMemberus-gaap:CommercialRealEstateMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:GrossWriteoffMemberus-gaap:CommercialRealEstateMember2023-01-012023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMembersrt:MultifamilyMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CriticizedAccrualMembersrt:MultifamilyMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CriticizedNonaccrualMembersrt:MultifamilyMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:GrossWriteoffMembersrt:MultifamilyMember2023-01-012023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberewbc:ConstructionAndLandLoanMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:GrossWriteoffMemberewbc:TotalCommercialRealEstateMember2023-01-012023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:GrossWriteoffMember2023-01-012023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PassMembersrt:SingleFamilyMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedAccrualMembersrt:SingleFamilyMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedNonaccrualMembersrt:SingleFamilyMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PassMemberus-gaap:HomeEquityMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedAccrualMemberus-gaap:HomeEquityMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedNonaccrualMemberus-gaap:HomeEquityMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:GrossWriteoffMemberus-gaap:HomeEquityMember2023-01-012023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:GrossWriteoffMemberewbc:TotalResidentialMortgageMember2023-01-012023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PassMemberewbc:OtherConsumerMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedNonaccrualMemberewbc:OtherConsumerMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:GrossWriteoffMember2023-01-012023-12-310001069157us-gaap:PassMember2023-12-310001069157ewbc:CriticizedAccrualMember2023-12-310001069157ewbc:CriticizedNonaccrualMember2023-12-310001069157ewbc:GrossWriteoffMember2023-01-012023-12-310001069157us-gaap:CommercialPortfolioSegmentMember2024-01-012024-12-310001069157us-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001069157us-gaap:CommercialPortfolioSegmentMember2022-01-012022-12-310001069157us-gaap:ConsumerLoanMember2024-01-012024-12-310001069157us-gaap:ConsumerLoanMember2023-01-012023-12-310001069157us-gaap:ConsumerLoanMember2022-01-012022-12-310001069157us-gaap:FederalHousingAdministrationLoanMemberus-gaap:PassMember2024-12-310001069157us-gaap:FederalHousingAdministrationLoanMemberus-gaap:PassMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:FinancialAssetNotPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:FinancialAssetPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:NonperformingFinancingReceivableMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancialAssetNotPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancialAssetPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:NonperformingFinancingReceivableMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMembersrt:MultifamilyMemberus-gaap:FinancialAssetNotPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMembersrt:MultifamilyMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMembersrt:MultifamilyMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMembersrt:MultifamilyMemberus-gaap:FinancialAssetPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMembersrt:MultifamilyMemberus-gaap:NonperformingFinancingReceivableMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:ConstructionAndLandLoanMemberus-gaap:FinancialAssetNotPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:ConstructionAndLandLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:ConstructionAndLandLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:ConstructionAndLandLoanMemberus-gaap:FinancialAssetPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:ConstructionAndLandLoanMemberus-gaap:NonperformingFinancingReceivableMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMemberus-gaap:FinancialAssetNotPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMemberus-gaap:FinancialAssetPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMemberus-gaap:NonperformingFinancingReceivableMember2024-12-310001069157us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMember2024-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2024-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2024-12-310001069157us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMember2024-12-310001069157us-gaap:NonperformingFinancingReceivableMemberus-gaap:CommercialPortfolioSegmentMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:FinancialAssetNotPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:FinancialAssetPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:NonperformingFinancingReceivableMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberus-gaap:FinancialAssetNotPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberus-gaap:FinancialAssetPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberus-gaap:NonperformingFinancingReceivableMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMemberus-gaap:FinancialAssetNotPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMemberus-gaap:FinancialAssetPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMemberus-gaap:NonperformingFinancingReceivableMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:FinancialAssetNotPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:FinancialAssetPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:NonperformingFinancingReceivableMember2024-12-310001069157us-gaap:FinancialAssetNotPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2024-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2024-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2024-12-310001069157us-gaap:FinancialAssetPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2024-12-310001069157us-gaap:NonperformingFinancingReceivableMemberus-gaap:ConsumerPortfolioSegmentMember2024-12-310001069157us-gaap:FinancialAssetNotPastDueMember2024-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMember2024-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMember2024-12-310001069157us-gaap:FinancialAssetPastDueMember2024-12-310001069157us-gaap:NonperformingFinancingReceivableMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:FinancialAssetPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:NonperformingFinancingReceivableMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancialAssetPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:NonperformingFinancingReceivableMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMembersrt:MultifamilyMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMembersrt:MultifamilyMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMembersrt:MultifamilyMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMembersrt:MultifamilyMemberus-gaap:FinancialAssetPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMembersrt:MultifamilyMemberus-gaap:NonperformingFinancingReceivableMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:ConstructionAndLandLoanMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:ConstructionAndLandLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:ConstructionAndLandLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:ConstructionAndLandLoanMemberus-gaap:FinancialAssetPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:ConstructionAndLandLoanMemberus-gaap:NonperformingFinancingReceivableMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMemberus-gaap:FinancialAssetPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMemberus-gaap:NonperformingFinancingReceivableMember2023-12-310001069157us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001069157us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001069157us-gaap:NonperformingFinancingReceivableMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:FinancialAssetPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:NonperformingFinancingReceivableMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberus-gaap:FinancialAssetPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberus-gaap:NonperformingFinancingReceivableMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMemberus-gaap:FinancialAssetPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMemberus-gaap:NonperformingFinancingReceivableMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:FinancialAssetPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:NonperformingFinancingReceivableMember2023-12-310001069157us-gaap:FinancialAssetNotPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001069157us-gaap:FinancialAssetPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001069157us-gaap:NonperformingFinancingReceivableMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001069157us-gaap:FinancialAssetNotPastDueMember2023-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001069157us-gaap:FinancialAssetPastDueMember2023-12-310001069157us-gaap:NonperformingFinancingReceivableMember2023-12-310001069157us-gaap:ResidentialRealEstateMember2024-12-310001069157us-gaap:ResidentialRealEstateMember2023-12-310001069157us-gaap:ExtendedMaturityMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2024-01-012024-12-310001069157us-gaap:PaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2024-01-012024-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2024-01-012024-12-310001069157ewbc:RateReductionAndPaymentDelayMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2024-01-012024-12-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2024-01-012024-12-310001069157us-gaap:PaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2024-01-012024-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2024-01-012024-12-310001069157ewbc:RateReductionAndPaymentDelayMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2024-01-012024-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-12-310001069157us-gaap:PaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-12-310001069157ewbc:RateReductionAndPaymentDelayMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2024-01-012024-12-310001069157us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2024-01-012024-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2024-01-012024-12-310001069157ewbc:RateReductionAndPaymentDelayMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2024-01-012024-12-310001069157srt:SingleFamilyMemberus-gaap:ConsumerPortfolioSegmentMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2024-01-012024-12-310001069157us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2024-01-012024-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2024-01-012024-12-310001069157ewbc:RateReductionAndPaymentDelayMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2024-01-012024-12-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityMemberus-gaap:ConsumerPortfolioSegmentMember2024-01-012024-12-310001069157us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMember2024-01-012024-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:ConsumerPortfolioSegmentMember2024-01-012024-12-310001069157ewbc:RateReductionAndPaymentDelayMemberus-gaap:ConsumerPortfolioSegmentMember2024-01-012024-12-310001069157us-gaap:ConsumerPortfolioSegmentMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityMember2024-01-012024-12-310001069157us-gaap:PaymentDeferralMember2024-01-012024-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMember2024-01-012024-12-310001069157ewbc:RateReductionAndPaymentDelayMember2024-01-012024-12-310001069157us-gaap:ExtendedMaturityMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-12-310001069157us-gaap:PaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-12-310001069157ewbc:RateReductionAndPaymentDelayMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-12-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001069157us-gaap:ExtendedMaturityMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2023-01-012023-12-310001069157us-gaap:PaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2023-01-012023-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2023-01-012023-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2023-01-012023-12-310001069157ewbc:RateReductionAndPaymentDelayMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2023-01-012023-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001069157us-gaap:ExtendedMaturityMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001069157us-gaap:PaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001069157ewbc:RateReductionAndPaymentDelayMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001069157us-gaap:ExtendedMaturityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2023-01-012023-12-310001069157us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2023-01-012023-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2023-01-012023-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2023-01-012023-12-310001069157ewbc:RateReductionAndPaymentDelayMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2023-01-012023-12-310001069157srt:SingleFamilyMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-12-310001069157us-gaap:ExtendedMaturityMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-01-012023-12-310001069157us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-01-012023-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-01-012023-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-01-012023-12-310001069157ewbc:RateReductionAndPaymentDelayMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-01-012023-12-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-12-310001069157us-gaap:ExtendedMaturityMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-12-310001069157us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-12-310001069157ewbc:RateReductionAndPaymentDelayMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-12-310001069157us-gaap:ConsumerPortfolioSegmentMember2023-01-012023-12-310001069157us-gaap:ExtendedMaturityMember2023-01-012023-12-310001069157us-gaap:PaymentDeferralMember2023-01-012023-12-310001069157ewbc:ExtendedMaturityAndPaymentDeferralMember2023-01-012023-12-310001069157us-gaap:ExtendedMaturityAndInterestRateReductionMember2023-01-012023-12-310001069157ewbc:RateReductionAndPaymentDelayMember2023-01-012023-12-310001069157us-gaap:InterestRateBelowMarketReductionMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2024-01-012024-12-310001069157us-gaap:InterestRateBelowMarketReductionMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2024-01-012024-12-310001069157us-gaap:InterestRateBelowMarketReductionMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2024-01-012024-12-310001069157us-gaap:InterestRateBelowMarketReductionMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2024-01-012024-12-310001069157us-gaap:PrincipalForgivenessMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-12-310001069157us-gaap:InterestRateBelowMarketReductionMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2023-01-012023-12-310001069157us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2023-01-012023-12-310001069157us-gaap:InterestRateBelowMarketReductionMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2023-01-012023-12-310001069157us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-01-012023-12-310001069157us-gaap:InterestRateBelowMarketReductionMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-01-012023-12-310001069157us-gaap:PrincipalForgivenessMember2023-01-012023-12-310001069157ewbc:CombinationTermExtensionAndPaymentDelayMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2024-01-012024-12-310001069157ewbc:CombinationTermExtensionAndPaymentDelayMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-12-310001069157ewbc:CombinationTermExtensionAndPaymentDelayMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2024-01-012024-12-310001069157ewbc:CombinationTermExtensionAndPaymentDelayMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2024-01-012024-12-310001069157ewbc:CombinationTermExtensionAndPaymentDelayMemberus-gaap:ConsumerPortfolioSegmentMember2024-01-012024-12-310001069157ewbc:CombinationTermExtensionAndPaymentDelayMember2024-01-012024-12-310001069157ewbc:CombinationTermExtensionAndPaymentDelayMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2023-01-012023-12-310001069157ewbc:CombinationTermExtensionAndPaymentDelayMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-01-012023-12-310001069157ewbc:CombinationTermExtensionAndPaymentDelayMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-12-310001069157ewbc:CombinationTermExtensionAndPaymentDelayMember2023-01-012023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberewbc:FinancialAsset30To89DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberewbc:FinancialAsset30To89DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-12-310001069157ewbc:FinancialAsset30To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2024-12-310001069157us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberewbc:FinancialAsset30To89DaysPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberewbc:FinancialAsset30To89DaysPastDueMember2024-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-12-310001069157ewbc:FinancialAsset30To89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2024-12-310001069157us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2024-12-310001069157ewbc:FinancialAsset30To89DaysPastDueMember2024-12-310001069157us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberewbc:FinancialAsset30To89DaysPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberewbc:FinancialAsset30To89DaysPastDueMember2023-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001069157ewbc:FinancialAsset30To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001069157us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberewbc:FinancialAsset30To89DaysPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberewbc:FinancialAsset30To89DaysPastDueMember2023-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001069157ewbc:FinancialAsset30To89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001069157us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001069157ewbc:FinancialAsset30To89DaysPastDueMember2023-12-310001069157us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-12-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2022-01-012022-12-310001069157us-gaap:ConsumerPortfolioSegmentMember2022-01-012022-12-310001069157ewbc:PrincipalForbearancePaymentsTermExtensionsPrincipalDefermentsMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-01-012022-12-310001069157ewbc:OtherModificationMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-01-012022-12-310001069157ewbc:PrincipalForbearancePaymentsTermExtensionsPrincipalDefermentsMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-12-310001069157ewbc:OtherModificationMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-12-310001069157ewbc:PrincipalForbearancePaymentsTermExtensionsPrincipalDefermentsMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2022-01-012022-12-310001069157ewbc:OtherModificationMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2022-01-012022-12-310001069157ewbc:PrincipalForbearancePaymentsTermExtensionsPrincipalDefermentsMemberus-gaap:ConsumerPortfolioSegmentMember2022-01-012022-12-310001069157ewbc:OtherModificationMemberus-gaap:ConsumerPortfolioSegmentMember2022-01-012022-12-310001069157ewbc:PrincipalForbearancePaymentsTermExtensionsPrincipalDefermentsMember2022-01-012022-12-310001069157ewbc:OtherModificationMember2022-01-012022-12-310001069157ewbc:CommercialAndIndustrialLoanMember2023-06-300001069157ewbc:CommercialAndIndustrialLoanMember2023-09-300001069157srt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-12-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2024-01-012024-12-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157srt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157srt:SingleFamilyMemberus-gaap:ConsumerPortfolioSegmentMember2022-12-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2022-12-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:AccountingStandardsUpdate202202Member2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:AccountingStandardsUpdate202202Member2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialPortfolioSegmentMembersrt:MultifamilyMemberus-gaap:AccountingStandardsUpdate202202Member2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialPortfolioSegmentMemberewbc:ConstructionAndLandLoanMemberus-gaap:AccountingStandardsUpdate202202Member2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:AccountingStandardsUpdate202202Member2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMemberus-gaap:AccountingStandardsUpdate202202Member2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:AccountingStandardsUpdate202202Member2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate202202Member2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMemberus-gaap:CommercialPortfolioSegmentMembersrt:MultifamilyMember2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMemberus-gaap:CommercialPortfolioSegmentMemberewbc:ConstructionAndLandLoanMember2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMemberus-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMember2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2022-12-310001069157srt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-12-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2021-12-310001069157srt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2021-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-12-310001069157srt:SingleFamilyMemberus-gaap:ConsumerPortfolioSegmentMember2021-12-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2021-12-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2021-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-12-310001069157srt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-12-310001069157srt:SingleFamilyMemberus-gaap:ConsumerPortfolioSegmentMember2022-01-012022-12-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2022-01-012022-12-310001069157us-gaap:UnfundedLoanCommitmentMember2023-12-310001069157us-gaap:UnfundedLoanCommitmentMember2022-12-310001069157us-gaap:UnfundedLoanCommitmentMember2021-12-310001069157us-gaap:UnfundedLoanCommitmentMember2024-01-012024-12-310001069157us-gaap:UnfundedLoanCommitmentMember2023-01-012023-12-310001069157us-gaap:UnfundedLoanCommitmentMember2022-01-012022-12-310001069157us-gaap:UnfundedLoanCommitmentMember2024-12-310001069157ewbc:LoansReceivableOriginatedMember2024-01-012024-12-310001069157ewbc:LoansReceivableOriginatedMember2023-01-012023-12-310001069157ewbc:LoansReceivableOriginatedMember2022-01-012022-12-310001069157ewbc:LoansSoldInSecondaryMarketMemberewbc:LoansReceivablePurchasedMember2024-01-012024-12-310001069157ewbc:LoansSoldInSecondaryMarketMemberewbc:LoansReceivablePurchasedMember2023-01-012023-12-310001069157ewbc:LoansSoldInSecondaryMarketMemberewbc:LoansReceivablePurchasedMember2022-01-012022-12-310001069157ewbc:AffordableHousingPartnershipMember2024-12-310001069157ewbc:AffordableHousingPartnershipMember2023-12-310001069157ewbc:TaxCreditAndCRAInvestmentsMember2024-12-310001069157ewbc:TaxCreditAndCRAInvestmentsMember2023-12-310001069157ewbc:AffordableHousingPartnershipMember2024-01-012024-12-310001069157ewbc:AffordableHousingPartnershipMember2023-01-012023-12-310001069157ewbc:AffordableHousingPartnershipMember2022-01-012022-12-310001069157ewbc:TaxCreditAndCRAInvestmentsMember2024-01-012024-12-310001069157ewbc:TaxCreditAndCRAInvestmentsMember2023-01-012023-12-310001069157ewbc:TaxCreditAndCRAInvestmentsMember2022-01-012022-12-310001069157ewbc:HistoricTaxCreditInvestmentMember2024-01-012024-12-310001069157ewbc:HistoricTaxCreditInvestmentMember2023-01-012023-12-310001069157ewbc:HistoricTaxCreditInvestmentMember2022-01-012022-12-310001069157ewbc:OtherAssetsAndAffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2024-12-310001069157ewbc:OtherAssetsAndAffordableHousingPartnershipTaxCreditAndCRAInvestmentsNetMember2023-12-310001069157ewbc:RayliantGlobalAdvisorsLimitedMember2024-12-310001069157us-gaap:GeographicDistributionDomesticMember2024-12-310001069157us-gaap:GeographicDistributionDomesticMember2023-12-310001069157us-gaap:GeographicDistributionForeignMember2024-12-310001069157us-gaap:GeographicDistributionForeignMember2023-12-310001069157srt:ParentCompanyMemberus-gaap:JuniorSubordinatedDebtMember2024-12-310001069157srt:ParentCompanyMemberus-gaap:JuniorSubordinatedDebtMember2023-12-310001069157ewbc:BankTermFundingProgramMember2023-12-310001069157ewbc:BankTermFundingProgramMember2024-12-310001069157ewbc:FloatingMembersrt:MinimumMember2024-12-310001069157ewbc:FloatingMembersrt:MaximumMember2024-12-310001069157ewbc:FloatingMember2024-12-310001069157ewbc:FloatingMember2023-12-310001069157ewbc:FixedMembersrt:MinimumMember2024-12-310001069157ewbc:FixedMembersrt:MaximumMember2024-12-310001069157ewbc:FixedMember2024-12-310001069157ewbc:FixedMember2023-12-310001069157ewbc:MCBIStatutoryTrustIMemberus-gaap:JuniorSubordinatedDebtMember2024-01-012024-12-310001069157us-gaap:JuniorSubordinatedDebtMember2024-12-310001069157us-gaap:JuniorSubordinatedDebtMember2024-01-012024-03-310001069157us-gaap:StateAndLocalJurisdictionMember2024-12-310001069157us-gaap:LoanOriginationCommitmentsMember2024-12-310001069157us-gaap:LoanOriginationCommitmentsMember2023-12-310001069157us-gaap:LetterOfCreditMember2024-12-310001069157us-gaap:LetterOfCreditMember2023-12-310001069157us-gaap:CommitmentsToExtendCreditMember2024-12-310001069157us-gaap:CommitmentsToExtendCreditMember2023-12-310001069157us-gaap:StandbyLettersOfCreditMember2024-12-310001069157ewbc:CommercialLettersOfCreditMember2024-12-310001069157us-gaap:StandbyLettersOfCreditMember2023-12-310001069157ewbc:CommercialLettersOfCreditMember2023-12-310001069157us-gaap:GuaranteeObligationsMemberewbc:LoansSoldorSecuritizedWithRecourseMemberewbc:SingleFamilyResidentialMember2024-12-310001069157us-gaap:GuaranteeObligationsMemberewbc:LoansSoldorSecuritizedWithRecourseMemberewbc:SingleFamilyResidentialMember2023-12-310001069157us-gaap:GuaranteeObligationsMemberewbc:LoansSoldorSecuritizedWithRecourseMemberewbc:MultifamilyResidentialMember2024-12-310001069157us-gaap:GuaranteeObligationsMemberewbc:LoansSoldorSecuritizedWithRecourseMemberewbc:MultifamilyResidentialMember2023-12-310001069157us-gaap:GuaranteeObligationsMemberewbc:LoansSoldorSecuritizedWithRecourseMember2024-12-310001069157us-gaap:GuaranteeObligationsMemberewbc:LoansSoldorSecuritizedWithRecourseMember2023-12-310001069157us-gaap:GuaranteeObligationsMemberewbc:LoansSoldorSecuritizedWithRecourseMemberewbc:SingleFamilyResidentialAndMultiFamilyResidentialMember2024-12-310001069157us-gaap:GuaranteeObligationsMemberewbc:LoansSoldorSecuritizedWithRecourseMemberewbc:SingleFamilyResidentialAndMultiFamilyResidentialMember2023-12-310001069157ewbc:A2021StockIncentivePlanMember2024-12-310001069157ewbc:A2021StockIncentivePlanMember2023-12-310001069157ewbc:A2021StockIncentivePlanMember2022-12-310001069157us-gaap:RestrictedStockUnitsRSUMemberewbc:CliffVestingMember2024-01-012024-12-310001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMembersrt:MinimumMember2024-01-012024-12-310001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMembersrt:MaximumMember2024-01-012024-12-310001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMemberewbc:CliffVestingMember2024-01-012024-12-310001069157ewbc:TimeBasedRestrictedStockSettledinStockMember2023-12-310001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMember2023-12-310001069157ewbc:TimeBasedRestrictedStockSettledinStockMember2024-01-012024-12-310001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMember2024-01-012024-12-310001069157ewbc:TimeBasedRestrictedStockSettledinStockMember2024-12-310001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMember2024-12-310001069157ewbc:TimeBasedRestrictedStockSettledinStockMember2023-01-012023-12-310001069157ewbc:TimeBasedRestrictedStockSettledinStockMember2022-01-012022-12-310001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMember2023-01-012023-12-310001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMember2022-01-012022-12-310001069157us-gaap:EmployeeStockMember2024-01-012024-12-310001069157us-gaap:EmployeeStockMember2024-12-310001069157us-gaap:EmployeeStockMember2023-01-012023-12-310001069157us-gaap:RestrictedStockUnitsRSUMember2024-01-012024-12-310001069157us-gaap:RestrictedStockUnitsRSUMember2023-01-012023-12-310001069157us-gaap:RestrictedStockUnitsRSUMember2022-01-012022-12-3100010691572020-12-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-12-310001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-12-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2021-12-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-01-012022-12-310001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-01-012022-12-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2022-01-012022-12-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-12-310001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-12-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2022-12-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-01-012023-12-310001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-01-012023-12-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2023-01-012023-12-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-12-310001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-12-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2023-12-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2024-01-012024-12-310001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2024-01-012024-12-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2024-01-012024-12-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2024-12-310001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2024-12-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2024-12-310001069157ewbc:CompanyMember2024-12-310001069157ewbc:CompanyMember2023-12-310001069157ewbc:EastWestBankMember2024-12-310001069157ewbc:EastWestBankMember2023-12-310001069157ewbc:ConsumerandBusinessBankingMember2024-01-012024-12-310001069157ewbc:CommercialBankingMember2024-01-012024-12-310001069157ewbc:TreasuryAndOtherMember2024-01-012024-12-310001069157ewbc:ConsumerandBusinessBankingMember2024-12-310001069157ewbc:CommercialBankingMember2024-12-310001069157ewbc:TreasuryAndOtherMember2024-12-310001069157ewbc:ConsumerandBusinessBankingMember2023-01-012023-12-310001069157ewbc:CommercialBankingMember2023-01-012023-12-310001069157ewbc:TreasuryAndOtherMember2023-01-012023-12-310001069157ewbc:ConsumerandBusinessBankingMember2023-12-310001069157ewbc:CommercialBankingMember2023-12-310001069157ewbc:TreasuryAndOtherMember2023-12-310001069157ewbc:ConsumerandBusinessBankingMember2022-01-012022-12-310001069157ewbc:CommercialBankingMember2022-01-012022-12-310001069157ewbc:TreasuryAndOtherMember2022-01-012022-12-310001069157ewbc:ConsumerandBusinessBankingMember2022-12-310001069157ewbc:CommercialBankingMember2022-12-310001069157ewbc:TreasuryAndOtherMember2022-12-310001069157srt:ParentCompanyMember2024-12-310001069157srt:ParentCompanyMember2023-12-310001069157ewbc:BankSubsidiariesMembersrt:ParentCompanyMember2024-12-310001069157ewbc:BankSubsidiariesMembersrt:ParentCompanyMember2023-12-310001069157ewbc:NonbankSubsidiariesMembersrt:ParentCompanyMember2024-12-310001069157ewbc:NonbankSubsidiariesMembersrt:ParentCompanyMember2023-12-310001069157ewbc:BankSubsidiariesMembersrt:ParentCompanyMember2024-01-012024-12-310001069157ewbc:BankSubsidiariesMembersrt:ParentCompanyMember2023-01-012023-12-310001069157ewbc:BankSubsidiariesMembersrt:ParentCompanyMember2022-01-012022-12-310001069157ewbc:NonbankSubsidiariesMembersrt:ParentCompanyMember2024-01-012024-12-310001069157ewbc:NonbankSubsidiariesMembersrt:ParentCompanyMember2023-01-012023-12-310001069157ewbc:NonbankSubsidiariesMembersrt:ParentCompanyMember2022-01-012022-12-310001069157srt:ParentCompanyMember2024-01-012024-12-310001069157srt:ParentCompanyMember2023-01-012023-12-310001069157srt:ParentCompanyMember2022-01-012022-12-310001069157srt:ParentCompanyMember2022-12-310001069157srt:ParentCompanyMember2021-12-310001069157us-gaap:SubsequentEventMember2025-01-232025-01-230001069157us-gaap:SubsequentEventMember2025-01-2200010691572024-10-012024-12-310001069157ewbc:DominicNgMember2024-01-012024-12-310001069157ewbc:DominicNgMember2024-10-012024-12-310001069157ewbc:DominicNgMember2024-12-31