10-Q 1 ewbc-20230630.htm 10-Q ewbc-20230630
000106915712/312023Q2false00010691572023-01-012023-06-3000010691572023-07-31xbrli:shares00010691572023-06-30iso4217:USD00010691572022-12-31iso4217:USDxbrli:shares00010691572023-04-012023-06-3000010691572022-04-012022-06-3000010691572022-01-012022-06-300001069157us-gaap:CommonStockMember2022-03-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2022-03-310001069157us-gaap:RetainedEarningsMember2022-03-310001069157us-gaap:TreasuryStockCommonMember2022-03-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-03-3100010691572022-03-310001069157us-gaap:RetainedEarningsMember2022-04-012022-06-300001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-04-012022-06-300001069157us-gaap:CommonStockMember2022-04-012022-06-300001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2022-04-012022-06-300001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:CommonStockMember2022-04-012022-06-300001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:TreasuryStockCommonMember2022-04-012022-06-300001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember2022-04-012022-06-300001069157ewbc:StockRepurchasePlanMemberus-gaap:CommonStockMember2022-04-012022-06-300001069157ewbc:StockRepurchasePlanMemberus-gaap:TreasuryStockCommonMember2022-04-012022-06-300001069157ewbc:StockRepurchasePlanMember2022-04-012022-06-300001069157us-gaap:CommonStockMember2022-06-300001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2022-06-300001069157us-gaap:RetainedEarningsMember2022-06-300001069157us-gaap:TreasuryStockCommonMember2022-06-300001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-06-3000010691572022-06-300001069157us-gaap:CommonStockMember2023-03-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2023-03-310001069157us-gaap:RetainedEarningsMember2023-03-310001069157us-gaap:TreasuryStockCommonMember2023-03-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-03-3100010691572023-03-310001069157us-gaap:RetainedEarningsMember2023-04-012023-06-300001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-04-012023-06-300001069157us-gaap:CommonStockMember2023-04-012023-06-300001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2023-04-012023-06-300001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:CommonStockMember2023-04-012023-06-300001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:TreasuryStockCommonMember2023-04-012023-06-300001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember2023-04-012023-06-300001069157us-gaap:CommonStockMember2023-06-300001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2023-06-300001069157us-gaap:RetainedEarningsMember2023-06-300001069157us-gaap:TreasuryStockCommonMember2023-06-300001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-06-300001069157us-gaap:CommonStockMember2021-12-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2021-12-310001069157us-gaap:RetainedEarningsMember2021-12-310001069157us-gaap:TreasuryStockCommonMember2021-12-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-12-3100010691572021-12-310001069157us-gaap:RetainedEarningsMember2022-01-012022-06-300001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-01-012022-06-300001069157us-gaap:CommonStockMember2022-01-012022-06-300001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2022-01-012022-06-300001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:CommonStockMember2022-01-012022-06-300001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:TreasuryStockCommonMember2022-01-012022-06-300001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember2022-01-012022-06-300001069157ewbc:StockRepurchasePlanMemberus-gaap:CommonStockMember2022-01-012022-06-300001069157ewbc:StockRepurchasePlanMember2022-01-012022-06-300001069157us-gaap:CommonStockMember2022-12-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2022-12-310001069157us-gaap:RetainedEarningsMember2022-12-310001069157us-gaap:TreasuryStockCommonMember2022-12-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate202202Memberus-gaap:RetainedEarningsMember2022-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate202202Member2022-12-310001069157us-gaap:RetainedEarningsMember2023-01-012023-06-300001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-01-012023-06-300001069157us-gaap:CommonStockMember2023-01-012023-06-300001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2023-01-012023-06-300001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:CommonStockMember2023-01-012023-06-300001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMemberus-gaap:TreasuryStockCommonMember2023-01-012023-06-300001069157ewbc:StockCompensationPlansAndAgreementsVariousPlansAndAgreementsMember2023-01-012023-06-30ewbc:trust0001069157us-gaap:AccountingStandardsUpdate202202Member2022-12-310001069157us-gaap:AccountingStandardsUpdate202202Member2023-01-010001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-06-300001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Member2023-06-300001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:CommercialMortgageBackedSecuritiesMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-06-300001069157us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-06-300001069157us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Member2023-06-300001069157us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberewbc:ForeignGovernmentBondsMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberewbc:ForeignGovernmentBondsMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:ForeignGovernmentBondsMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:ForeignGovernmentBondsMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:AssetBackedSecuritiesMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:AssetBackedSecuritiesMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:CollateralizedLoanObligationsMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CollateralizedLoanObligationsMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateContractMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateContractMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2023-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Member2023-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel1Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel2Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMember2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel1Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel2Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommodityContractMember2023-06-300001069157us-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-06-300001069157us-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Member2023-06-300001069157us-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2023-06-300001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2022-12-310001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Member2022-12-310001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001069157us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2022-12-310001069157us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Member2022-12-310001069157us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberewbc:ForeignGovernmentBondsMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberewbc:ForeignGovernmentBondsMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:ForeignGovernmentBondsMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberewbc:ForeignGovernmentBondsMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:AssetBackedSecuritiesMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:AssetBackedSecuritiesMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:AssetBackedSecuritiesMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:CollateralizedLoanObligationsMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CollateralizedLoanObligationsMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateContractMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateContractMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Member2022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel1Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel2Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel1Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel2Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommodityContractMember2022-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2022-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Member2022-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Member2023-03-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Member2022-03-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Member2021-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Member2023-04-012023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Member2022-04-012022-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Member2023-01-012023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Member2022-01-012022-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Member2022-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMembersrt:MinimumMemberus-gaap:MeasurementInputPriceVolatilityMemberewbc:BlackScholesOptionPricingModelMemberus-gaap:FairValueInputsLevel3Member2023-06-30xbrli:pure0001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:MeasurementInputPriceVolatilityMemberewbc:BlackScholesOptionPricingModelMembersrt:MaximumMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157srt:WeightedAverageMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:MeasurementInputPriceVolatilityMemberewbc:BlackScholesOptionPricingModelMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157srt:WeightedAverageMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMembersrt:MinimumMemberus-gaap:MeasurementInputPriceVolatilityMemberewbc:BlackScholesOptionPricingModelMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:MeasurementInputPriceVolatilityMemberewbc:BlackScholesOptionPricingModelMembersrt:MaximumMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157srt:WeightedAverageMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:MeasurementInputPriceVolatilityMemberewbc:BlackScholesOptionPricingModelMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157srt:WeightedAverageMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquityContractMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel1Member2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel2Member2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMemberus-gaap:FairValueInputsLevel1Member2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMemberus-gaap:FairValueInputsLevel2Member2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:HomeEquityMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:HomeEquityMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:HomeEquityMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:HomeEquityMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel1Member2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel2Member2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel1Member2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel2Member2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMember2022-12-310001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-04-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-04-012022-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-01-012022-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-04-012022-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:MultifamilyResidentialMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:MultifamilyResidentialMemberus-gaap:CommercialPortfolioSegmentMember2022-04-012022-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:MultifamilyResidentialMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberewbc:MultifamilyResidentialMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMember2022-04-012022-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-06-300001069157us-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:HomeEquityMember2023-04-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:HomeEquityMember2022-04-012022-06-300001069157us-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:HomeEquityMember2023-01-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:HomeEquityMember2022-01-012022-06-300001069157us-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2023-04-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2022-04-012022-06-300001069157us-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2023-01-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2022-01-012022-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMember2023-04-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMember2022-04-012022-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMember2023-01-012023-06-300001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMember2022-01-012022-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMember2023-04-012023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMember2022-04-012022-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMember2023-01-012023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMember2022-01-012022-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherNonperformingAssetsMember2023-04-012023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherNonperformingAssetsMember2022-04-012022-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherNonperformingAssetsMember2023-01-012023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:OtherNonperformingAssetsMember2022-01-012022-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:IncomeApproachValuationTechniqueMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:IncomeApproachValuationTechniqueMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157srt:WeightedAverageMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:IncomeApproachValuationTechniqueMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMembersrt:MinimumMemberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMembersrt:MaximumMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157srt:WeightedAverageMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel3Memberewbc:ValuationTechniqueFairValueOfCollateralContractValueMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157srt:WeightedAverageMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel3Memberewbc:ValuationTechniqueIndividualAnalysisMember2023-06-300001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:IncomeApproachValuationTechniqueMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:IncomeApproachValuationTechniqueMembersrt:MinimumMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:IncomeApproachValuationTechniqueMemberus-gaap:MeasurementInputDiscountRateMembersrt:MaximumMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157srt:WeightedAverageMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:IncomeApproachValuationTechniqueMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMembersrt:MinimumMemberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMembersrt:MaximumMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157srt:WeightedAverageMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157srt:WeightedAverageMemberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:CarryingReportedAmountFairValueDisclosureMember2023-06-300001069157us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel1Member2023-06-300001069157us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel2Member2023-06-300001069157us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2023-06-300001069157us-gaap:EstimateOfFairValueFairValueDisclosureMember2023-06-300001069157us-gaap:CarryingReportedAmountFairValueDisclosureMember2022-12-310001069157us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel1Member2022-12-310001069157us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel2Member2022-12-310001069157us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2022-12-310001069157us-gaap:EstimateOfFairValueFairValueDisclosureMember2022-12-310001069157ewbc:LoansPurchasedUnderResaleAgreementsMember2023-04-012023-06-300001069157ewbc:LoansPurchasedUnderResaleAgreementsMember2022-04-012022-06-300001069157ewbc:LoansPurchasedUnderResaleAgreementsMember2023-01-012023-06-300001069157ewbc:LoansPurchasedUnderResaleAgreementsMember2022-01-012022-06-3000010691572023-01-012023-03-310001069157us-gaap:USTreasurySecuritiesMember2023-06-300001069157us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2023-06-300001069157ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-06-300001069157ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-06-300001069157us-gaap:USStatesAndPoliticalSubdivisionsMember2023-06-300001069157us-gaap:CommercialMortgageBackedSecuritiesMember2023-06-300001069157us-gaap:ResidentialMortgageBackedSecuritiesMember2023-06-300001069157us-gaap:CorporateDebtSecuritiesMember2023-06-300001069157ewbc:ForeignGovernmentBondsMember2023-06-300001069157us-gaap:AssetBackedSecuritiesMember2023-06-300001069157us-gaap:CollateralizedLoanObligationsMember2023-06-300001069157us-gaap:USTreasurySecuritiesMember2022-12-310001069157us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2022-12-310001069157ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2022-12-310001069157ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2022-12-310001069157us-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001069157us-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001069157us-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001069157us-gaap:CorporateDebtSecuritiesMember2022-12-310001069157ewbc:ForeignGovernmentBondsMember2022-12-310001069157us-gaap:AssetBackedSecuritiesMember2022-12-310001069157us-gaap:CollateralizedLoanObligationsMember2022-12-31ewbc:security0001069157ewbc:MortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2023-06-300001069157ewbc:NonAgencyMortgageBackedSecuritiesMember2023-06-300001069157ewbc:MortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2022-12-310001069157ewbc:NonAgencyMortgageBackedSecuritiesMember2022-12-310001069157us-gaap:AssetPledgedAsCollateralMember2023-06-300001069157us-gaap:AssetPledgedAsCollateralMember2022-12-310001069157ewbc:LondonClearingHouseChicagoMercantileExchangeMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2023-06-300001069157ewbc:LondonClearingHouseChicagoMercantileExchangeMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2022-12-310001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMember2023-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMember2022-12-310001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2023-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2022-12-310001069157us-gaap:DesignatedAsHedgingInstrumentMember2023-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMember2022-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2023-06-300001069157us-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2022-12-310001069157us-gaap:CommodityContractMemberus-gaap:NondesignatedMember2023-06-300001069157us-gaap:CommodityContractMemberus-gaap:NondesignatedMember2022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMember2023-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMember2022-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:NondesignatedMember2023-06-300001069157us-gaap:CreditRiskContractMemberus-gaap:NondesignatedMember2022-12-310001069157us-gaap:EquityContractMemberus-gaap:NondesignatedMember2023-06-300001069157us-gaap:EquityContractMemberus-gaap:NondesignatedMember2022-12-310001069157us-gaap:NondesignatedMember2023-06-300001069157us-gaap:NondesignatedMember2022-12-310001069157srt:CrudeOilMember2023-01-012023-06-30utr:Boe0001069157srt:NaturalGasReservesMember2023-01-012023-06-30utr:MMBTU0001069157srt:CrudeOilMember2022-01-012022-12-310001069157srt:NaturalGasReservesMember2022-01-012022-12-310001069157ewbc:EquityPublicCompaniesMemberus-gaap:NondesignatedMember2023-06-30ewbc:company0001069157us-gaap:NondesignatedMemberewbc:EquityPrivateCompaniesMember2023-06-300001069157ewbc:EquityPublicCompaniesMemberus-gaap:NondesignatedMember2022-12-310001069157us-gaap:NondesignatedMemberewbc:EquityPrivateCompaniesMember2022-12-310001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberewbc:OverlaySwapMemberus-gaap:InterestRateContractMember2023-06-300001069157ewbc:OverlaySwapMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2023-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMemberewbc:CommercialBankingMember2023-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMember2023-04-012023-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMember2022-04-012022-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMember2023-01-012023-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMember2022-01-012022-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestRateSwapMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestExpenseMember2023-04-012023-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMemberus-gaap:InterestExpenseMember2022-04-012022-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestRateSwapMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestExpenseMember2023-01-012023-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMemberus-gaap:InterestExpenseMember2022-01-012022-06-300001069157us-gaap:InterestIncomeMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMember2023-04-012023-06-300001069157us-gaap:InterestIncomeMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMember2022-04-012022-06-300001069157us-gaap:InterestIncomeMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMember2023-01-012023-06-300001069157us-gaap:InterestIncomeMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMember2022-01-012022-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberewbc:NoninterestIncomeMemberus-gaap:InterestRateSwapMemberus-gaap:CashFlowHedgingMember2023-04-012023-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberewbc:NoninterestIncomeMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMember2022-04-012022-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberewbc:NoninterestIncomeMemberus-gaap:InterestRateSwapMemberus-gaap:CashFlowHedgingMember2023-01-012023-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberewbc:NoninterestIncomeMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateContractMember2022-01-012022-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2023-04-012023-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2022-04-012022-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2023-01-012023-06-300001069157us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2022-01-012022-06-300001069157us-gaap:ForeignExchangeContractMembersrt:MaximumMemberus-gaap:NondesignatedMember2023-01-012023-06-300001069157us-gaap:ForeignExchangeContractMembersrt:MaximumMemberus-gaap:NondesignatedMember2022-01-012022-12-310001069157us-gaap:InterestRateContractMemberus-gaap:SwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157us-gaap:InterestRateContractMemberus-gaap:SwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157ewbc:WrittenOptionMemberus-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157ewbc:WrittenOptionMemberus-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157ewbc:CollarsandCorridorsMemberus-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157ewbc:CollarsandCorridorsMemberus-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157us-gaap:ForeignExchangeContractMemberewbc:ForwardAndSpotMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157us-gaap:ForeignExchangeContractMemberewbc:ForwardAndSpotMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:SwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:SwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157us-gaap:ForeignExchangeContractMemberewbc:OtherFinancialInstrumentMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157us-gaap:ForeignExchangeContractMemberewbc:OtherFinancialInstrumentMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157us-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157us-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:InterestRateContractMemberus-gaap:SwapMember2023-06-300001069157us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:InterestRateContractMemberus-gaap:SwapMember2022-12-310001069157ewbc:PurchasedOptionsMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:InterestRateContractMember2023-06-300001069157ewbc:PurchasedOptionsMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:InterestRateContractMember2022-12-310001069157us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:WrittenOptionMemberus-gaap:InterestRateContractMember2023-06-300001069157us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:WrittenOptionMemberus-gaap:InterestRateContractMember2022-12-310001069157us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:CollarsandCorridorsMemberus-gaap:InterestRateContractMember2023-06-300001069157us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:CollarsandCorridorsMemberus-gaap:InterestRateContractMember2022-12-310001069157us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:InterestRateContractMember2023-06-300001069157us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:InterestRateContractMember2022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:ForwardAndSpotMember2023-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:ForwardAndSpotMember2022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2023-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:OtherFinancialInstrumentMember2023-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberewbc:OtherFinancialInstrumentMember2022-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-12-310001069157us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-06-300001069157us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-12-310001069157us-gaap:CommodityContractMemberus-gaap:SwapMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-01-012023-06-300001069157us-gaap:CommodityContractMemberus-gaap:SwapMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157us-gaap:CommodityContractMemberus-gaap:SwapMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-01-012022-12-310001069157us-gaap:CommodityContractMemberus-gaap:SwapMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157ewbc:CollarsMemberus-gaap:CommodityContractMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-01-012023-06-300001069157ewbc:CollarsMemberus-gaap:CommodityContractMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157ewbc:CollarsMemberus-gaap:CommodityContractMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-01-012022-12-310001069157ewbc:CollarsMemberus-gaap:CommodityContractMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157us-gaap:CommodityContractMemberewbc:WrittenOptionMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-01-012023-06-300001069157us-gaap:CommodityContractMemberewbc:WrittenOptionMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157us-gaap:CommodityContractMemberewbc:WrittenOptionMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-01-012022-12-310001069157us-gaap:CommodityContractMemberewbc:WrittenOptionMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157us-gaap:CommodityContractMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-01-012023-06-300001069157us-gaap:CommodityContractMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157us-gaap:CommodityContractMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-01-012022-12-310001069157us-gaap:CommodityContractMembersrt:CrudeOilMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:SwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-01-012023-06-300001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:SwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:SwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-01-012022-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:SwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-01-012023-06-300001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-01-012022-12-310001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberewbc:WrittenOptionMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-01-012023-06-300001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberewbc:WrittenOptionMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberewbc:WrittenOptionMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-01-012022-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberewbc:WrittenOptionMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-01-012023-06-300001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-01-012022-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2023-06-300001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2022-12-310001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMembersrt:CrudeOilMember2023-01-012023-06-300001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMembersrt:CrudeOilMember2023-06-300001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMembersrt:CrudeOilMember2022-01-012022-12-310001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMembersrt:CrudeOilMember2022-12-310001069157ewbc:CollarsMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMembersrt:CrudeOilMember2023-01-012023-06-300001069157ewbc:CollarsMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMembersrt:CrudeOilMember2023-06-300001069157ewbc:CollarsMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMembersrt:CrudeOilMember2022-01-012022-12-310001069157ewbc:CollarsMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMembersrt:CrudeOilMember2022-12-310001069157ewbc:PurchasedOptionsMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMembersrt:CrudeOilMember2023-01-012023-06-300001069157ewbc:PurchasedOptionsMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMembersrt:CrudeOilMember2023-06-300001069157ewbc:PurchasedOptionsMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMembersrt:CrudeOilMember2022-01-012022-12-310001069157ewbc:PurchasedOptionsMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMembersrt:CrudeOilMember2022-12-310001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMembersrt:CrudeOilMember2023-01-012023-06-300001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMembersrt:CrudeOilMember2023-06-300001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMembersrt:CrudeOilMember2022-01-012022-12-310001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMembersrt:CrudeOilMember2022-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2023-01-012023-06-300001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2023-06-300001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2022-01-012022-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMemberus-gaap:SwapMember2022-12-310001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-01-012023-06-300001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-06-300001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-01-012022-12-310001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-12-310001069157ewbc:PurchasedOptionsMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-01-012023-06-300001069157ewbc:PurchasedOptionsMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-06-300001069157ewbc:PurchasedOptionsMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-01-012022-12-310001069157ewbc:PurchasedOptionsMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-01-012023-06-300001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-06-300001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-01-012022-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-12-310001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2023-06-300001069157us-gaap:CommodityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:NondesignatedMemberus-gaap:ShortMember2023-01-012023-06-300001069157us-gaap:CreditRiskContractMemberus-gaap:NondesignatedMemberus-gaap:ShortMember2022-01-012022-12-310001069157ewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2023-04-012023-06-300001069157ewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2022-04-012022-06-300001069157ewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2023-01-012023-06-300001069157ewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2022-01-012022-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:ForeignCurrencyGainLossMemberus-gaap:NondesignatedMember2023-04-012023-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:ForeignCurrencyGainLossMemberus-gaap:NondesignatedMember2022-04-012022-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:ForeignCurrencyGainLossMemberus-gaap:NondesignatedMember2023-01-012023-06-300001069157us-gaap:ForeignExchangeContractMemberus-gaap:ForeignCurrencyGainLossMemberus-gaap:NondesignatedMember2022-01-012022-06-300001069157us-gaap:CreditRiskContractMemberewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:NondesignatedMember2023-04-012023-06-300001069157us-gaap:CreditRiskContractMemberewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:NondesignatedMember2022-04-012022-06-300001069157us-gaap:CreditRiskContractMemberewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:NondesignatedMember2023-01-012023-06-300001069157us-gaap:CreditRiskContractMemberewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:NondesignatedMember2022-01-012022-06-300001069157us-gaap:EquityContractMemberus-gaap:NondesignatedMemberewbc:LendingfeesMember2023-04-012023-06-300001069157us-gaap:EquityContractMemberus-gaap:NondesignatedMemberewbc:LendingfeesMember2022-04-012022-06-300001069157us-gaap:EquityContractMemberus-gaap:NondesignatedMemberewbc:LendingfeesMember2023-01-012023-06-300001069157us-gaap:EquityContractMemberus-gaap:NondesignatedMemberewbc:LendingfeesMember2022-01-012022-06-300001069157ewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:CommodityContractMemberus-gaap:NondesignatedMember2023-04-012023-06-300001069157ewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:CommodityContractMemberus-gaap:NondesignatedMember2022-04-012022-06-300001069157ewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:CommodityContractMemberus-gaap:NondesignatedMember2023-01-012023-06-300001069157ewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:CommodityContractMemberus-gaap:NondesignatedMember2022-01-012022-06-300001069157us-gaap:NondesignatedMember2023-04-012023-06-300001069157us-gaap:NondesignatedMember2022-04-012022-06-300001069157us-gaap:NondesignatedMember2023-01-012023-06-300001069157us-gaap:NondesignatedMember2022-01-012022-06-300001069157ewbc:CreditRiskRelatedContingentFeaturesMember2023-06-300001069157ewbc:CreditRiskRelatedContingentFeaturesMember2022-12-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:TotalCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:TotalCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMember2022-12-310001069157us-gaap:PassMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-06-300001069157ewbc:CriticizedAccrualMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-06-300001069157ewbc:CriticizedNonaccrualMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-06-300001069157ewbc:GrossWriteoffMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-06-300001069157us-gaap:PassMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:CriticizedAccrualMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:CriticizedNonaccrualMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:GrossWriteoffMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:PassMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:CriticizedAccrualMemberus-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:CriticizedNonaccrualMemberus-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:ConstructionAndLandLoanMemberus-gaap:PassMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:ConstructionAndLandLoanMemberewbc:CriticizedAccrualMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:GrossWriteoffMemberus-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMember2023-01-012023-06-300001069157ewbc:GrossWriteoffMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:PassMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberewbc:CriticizedAccrualMemberus-gaap:RealEstateLoanMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedNonaccrualMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PassMemberus-gaap:HomeEquityMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedAccrualMemberus-gaap:HomeEquityMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedNonaccrualMemberus-gaap:HomeEquityMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:GrossWriteoffMemberus-gaap:HomeEquityMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:GrossWriteoffMemberewbc:TotalResidentialMortgageMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:PassMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedNonaccrualMemberewbc:OtherConsumerMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:GrossWriteoffMemberewbc:OtherConsumerMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:GrossWriteoffMember2023-01-012023-06-300001069157us-gaap:PassMember2023-06-300001069157ewbc:CriticizedAccrualMember2023-06-300001069157ewbc:CriticizedNonaccrualMember2023-06-300001069157ewbc:GrossWriteoffMember2023-01-012023-06-300001069157us-gaap:PassMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-12-310001069157ewbc:CriticizedAccrualMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-12-310001069157ewbc:CriticizedNonaccrualMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-12-310001069157us-gaap:PassMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:CriticizedAccrualMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:CriticizedNonaccrualMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:PassMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:CriticizedAccrualMemberus-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:CriticizedNonaccrualMemberus-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:PassMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:ConstructionAndLandLoanMemberewbc:CriticizedAccrualMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:PassMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberewbc:CriticizedAccrualMemberus-gaap:RealEstateLoanMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedNonaccrualMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PassMemberus-gaap:HomeEquityMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedAccrualMemberus-gaap:HomeEquityMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedNonaccrualMemberus-gaap:HomeEquityMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:PassMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedAccrualMemberewbc:OtherConsumerMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:CriticizedNonaccrualMemberewbc:OtherConsumerMember2022-12-310001069157us-gaap:PassMember2022-12-310001069157ewbc:CriticizedAccrualMember2022-12-310001069157ewbc:CriticizedNonaccrualMember2022-12-310001069157us-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:CommercialPortfolioSegmentMember2022-01-012022-06-300001069157us-gaap:CommercialPortfolioSegmentMember2022-04-012022-06-300001069157us-gaap:ConsumerLoanMember2023-04-012023-06-300001069157us-gaap:ConsumerLoanMember2023-01-012023-06-300001069157us-gaap:ConsumerLoanMember2022-01-012022-06-300001069157us-gaap:ConsumerLoanMember2022-04-012022-06-300001069157us-gaap:PassMemberus-gaap:FederalHousingAdministrationLoanMember2023-06-300001069157us-gaap:PassMemberus-gaap:FederalHousingAdministrationLoanMember2022-12-310001069157us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-06-300001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-06-300001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-06-300001069157us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-06-300001069157us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FinancialAssetPastDueMemberus-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:ConstructionAndLandLoanMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:ConstructionAndLandLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:ConstructionAndLandLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:ConstructionAndLandLoanMemberus-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMember2023-06-300001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMember2023-06-300001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMember2023-06-300001069157us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMember2023-06-300001069157us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:FinancialAssetNotPastDueMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:RealEstateLoanMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:HomeEquityMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:HomeEquityMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:HomeEquityMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMemberus-gaap:HomeEquityMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberewbc:TotalResidentialMortgageMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberewbc:TotalResidentialMortgageMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMemberewbc:TotalResidentialMortgageMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:FinancialAssetNotPastDueMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberewbc:OtherConsumerMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMemberewbc:OtherConsumerMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2023-06-300001069157us-gaap:FinancialAssetNotPastDueMember2023-06-300001069157us-gaap:FinancingReceivables30To59DaysPastDueMember2023-06-300001069157us-gaap:FinancingReceivables60To89DaysPastDueMember2023-06-300001069157us-gaap:FinancialAssetPastDueMember2023-06-300001069157us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-12-310001069157us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-12-310001069157us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FinancialAssetPastDueMemberus-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMember2022-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMember2022-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMember2022-12-310001069157us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:TotalCommercialRealEstateMember2022-12-310001069157us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:RealEstateLoanMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:HomeEquityMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:HomeEquityMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:HomeEquityMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMemberus-gaap:HomeEquityMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberewbc:TotalResidentialMortgageMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberewbc:TotalResidentialMortgageMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMemberewbc:TotalResidentialMortgageMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberewbc:OtherConsumerMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMemberewbc:OtherConsumerMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2022-12-310001069157us-gaap:FinancialAssetNotPastDueMember2022-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001069157us-gaap:FinancialAssetPastDueMember2022-12-310001069157us-gaap:ResidentialRealEstateMember2023-06-300001069157us-gaap:ResidentialRealEstateMember2022-12-310001069157us-gaap:ExtendedMaturityMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-04-012023-06-300001069157us-gaap:PaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-04-012023-06-300001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-04-012023-06-300001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-04-012023-06-300001069157ewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-04-012023-06-300001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:ExtendedMaturityMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:PaymentDeferralMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157ewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:ExtendedMaturityMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:PaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157ewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ExtendedMaturityMembersrt:SingleFamilyMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:PaymentDeferralMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberewbc:ExtendedMaturityAndPaymentDeferralMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:ExtendedMaturityAndInterestRateReductionMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ExtendedMaturityMemberus-gaap:HomeEquityMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PaymentDeferralMemberus-gaap:HomeEquityMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:HomeEquityMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:HomeEquityMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMemberus-gaap:HomeEquityMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ExtendedMaturityMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PaymentDeferralMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:ExtendedMaturityAndPaymentDeferralMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ExtendedMaturityAndInterestRateReductionMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:ExtendedMaturityMember2023-04-012023-06-300001069157us-gaap:PaymentDeferralMember2023-04-012023-06-300001069157ewbc:ExtendedMaturityAndPaymentDeferralMember2023-04-012023-06-300001069157us-gaap:ExtendedMaturityAndInterestRateReductionMember2023-04-012023-06-300001069157ewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMember2023-04-012023-06-300001069157us-gaap:ExtendedMaturityMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-06-300001069157us-gaap:PaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-06-300001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-06-300001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-06-300001069157ewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-06-300001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:ExtendedMaturityMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:PaymentDeferralMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157ewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:ExtendedMaturityMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:PaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157ewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157ewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ExtendedMaturityMembersrt:SingleFamilyMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:PaymentDeferralMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberewbc:ExtendedMaturityAndPaymentDeferralMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:ExtendedMaturityAndInterestRateReductionMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ExtendedMaturityMemberus-gaap:HomeEquityMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PaymentDeferralMemberus-gaap:HomeEquityMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:ExtendedMaturityAndPaymentDeferralMemberus-gaap:HomeEquityMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ExtendedMaturityAndInterestRateReductionMemberus-gaap:HomeEquityMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMemberus-gaap:HomeEquityMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ExtendedMaturityMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PaymentDeferralMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:ExtendedMaturityAndPaymentDeferralMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ExtendedMaturityAndInterestRateReductionMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:ExtendedMaturityMember2023-01-012023-06-300001069157us-gaap:PaymentDeferralMember2023-01-012023-06-300001069157ewbc:ExtendedMaturityAndPaymentDeferralMember2023-01-012023-06-300001069157us-gaap:ExtendedMaturityAndInterestRateReductionMember2023-01-012023-06-300001069157ewbc:Ewbc_PrincipalForgivenessRateReductionTermExtensionMemberMember2023-01-012023-06-300001069157us-gaap:PrincipalForgivenessMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PrincipalForgivenessMembersrt:SingleFamilyMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PrincipalForgivenessMemberus-gaap:HomeEquityMember2023-04-012023-06-300001069157us-gaap:PrincipalForgivenessMember2023-04-012023-06-300001069157us-gaap:PrincipalForgivenessMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PrincipalForgivenessMembersrt:SingleFamilyMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PrincipalForgivenessMemberus-gaap:HomeEquityMember2023-01-012023-06-300001069157us-gaap:PrincipalForgivenessMember2023-01-012023-06-300001069157ewbc:FinancingReceivables30To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-06-300001069157us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2023-06-300001069157ewbc:FinancingReceivables30To89DaysPastDueMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157ewbc:FinancingReceivables30To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMemberewbc:FinancingReceivables30To89DaysPastDueMember2023-06-300001069157us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:FinancingReceivables30To89DaysPastDueMemberus-gaap:HomeEquityMember2023-06-300001069157us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:FinancingReceivables30To89DaysPastDueMember2023-06-300001069157us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2023-06-300001069157ewbc:FinancingReceivables30To89DaysPastDueMember2023-06-300001069157us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-06-300001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-04-012022-06-30ewbc:loan0001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-06-300001069157us-gaap:PrincipalForgivenessMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-04-012022-06-300001069157ewbc:OtherModificationMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-04-012022-06-300001069157us-gaap:PrincipalForgivenessMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-01-012022-06-300001069157ewbc:OtherModificationMemberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-01-012022-06-300001069157us-gaap:PrincipalForgivenessMember2022-04-012022-06-300001069157ewbc:OtherModificationMember2022-04-012022-06-300001069157us-gaap:PrincipalForgivenessMember2022-01-012022-06-300001069157ewbc:OtherModificationMember2022-01-012022-06-300001069157ewbc:USTreasurySpreadMember2023-01-012023-06-30utr:Q0001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-03-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-03-310001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2023-03-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-03-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2023-03-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-03-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMember2023-03-310001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2023-04-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMember2023-04-012023-06-300001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-03-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-03-310001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2022-03-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-03-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2022-03-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2022-03-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMember2022-03-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-04-012022-06-300001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2022-04-012022-06-300001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-04-012022-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2022-04-012022-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2022-04-012022-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMember2022-04-012022-06-300001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-06-300001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-06-300001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2022-06-300001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2022-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2022-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMember2022-06-300001069157us-gaap:AccountingStandardsUpdate202202Memberus-gaap:CommercialPortfolioSegmentMemberewbc:CommercialAndIndustrialLoanMember2022-12-310001069157us-gaap:AccountingStandardsUpdate202202Memberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:AccountingStandardsUpdate202202Memberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:AccountingStandardsUpdate202202Memberus-gaap:CommercialPortfolioSegmentMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:AccountingStandardsUpdate202202Member2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AccountingStandardsUpdate202202Memberus-gaap:HomeEquityMember2022-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMemberus-gaap:AccountingStandardsUpdate202202Member2022-12-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-01-010001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-010001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2023-01-010001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-01-010001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2023-01-010001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2023-01-010001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMember2023-01-0100010691572023-01-010001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2023-01-012023-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMember2023-01-012023-06-300001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2021-12-310001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2021-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-12-310001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2021-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2021-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMember2021-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-06-300001069157us-gaap:RealEstateLoanMembersrt:MultifamilyMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-06-300001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-06-300001069157us-gaap:ConsumerPortfolioSegmentMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMember2022-01-012022-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityMember2022-01-012022-06-300001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:OtherConsumerMember2022-01-012022-06-300001069157us-gaap:UnfundedLoanCommitmentMember2023-03-310001069157us-gaap:UnfundedLoanCommitmentMember2022-03-310001069157us-gaap:UnfundedLoanCommitmentMember2022-12-310001069157us-gaap:UnfundedLoanCommitmentMember2021-12-310001069157us-gaap:UnfundedLoanCommitmentMember2023-04-012023-06-300001069157us-gaap:UnfundedLoanCommitmentMember2022-04-012022-06-300001069157us-gaap:UnfundedLoanCommitmentMember2023-01-012023-06-300001069157us-gaap:UnfundedLoanCommitmentMember2022-01-012022-06-300001069157us-gaap:UnfundedLoanCommitmentMember2023-06-300001069157us-gaap:UnfundedLoanCommitmentMember2022-06-300001069157ewbc:LoansReceivableOriginatedMember2023-04-012023-06-300001069157ewbc:LoansReceivableOriginatedMember2023-01-012023-06-300001069157ewbc:LoansReceivableOriginatedMember2022-04-012022-06-300001069157ewbc:LoansReceivableOriginatedMember2022-01-012022-06-300001069157ewbc:LoansReceivablePurchasedMemberewbc:LoansSoldInSecondaryMarketMember2023-04-012023-06-300001069157ewbc:LoansReceivablePurchasedMemberewbc:LoansSoldInSecondaryMarketMember2023-01-012023-06-300001069157ewbc:LoansReceivablePurchasedMemberewbc:LoansSoldInSecondaryMarketMember2022-04-012022-06-300001069157ewbc:LoansReceivablePurchasedMemberewbc:LoansSoldInSecondaryMarketMember2022-01-012022-06-300001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMember2023-06-300001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMember2022-12-310001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetAndOtherAssetsMember2023-06-300001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetAndOtherAssetsMember2022-12-310001069157ewbc:HistoricTaxCreditInvestmentMember2023-04-012023-06-300001069157ewbc:HistoricTaxCreditInvestmentMember2023-01-012023-06-300001069157ewbc:HistoricTaxCreditInvestmentMember2022-01-012022-06-300001069157ewbc:HistoricTaxCreditInvestmentMember2022-04-012022-06-300001069157us-gaap:AssetPledgedAsCollateralWithRightMemberus-gaap:NotesPayableOtherPayablesMember2023-06-300001069157us-gaap:JuniorSubordinatedDebtMember2023-06-300001069157us-gaap:JuniorSubordinatedDebtMember2022-12-310001069157us-gaap:JuniorSubordinatedDebtMembersrt:MinimumMember2023-06-300001069157us-gaap:JuniorSubordinatedDebtMembersrt:MaximumMember2023-06-300001069157us-gaap:JuniorSubordinatedDebtMembersrt:MinimumMember2022-12-310001069157us-gaap:JuniorSubordinatedDebtMembersrt:MaximumMember2022-12-310001069157us-gaap:LoanOriginationCommitmentsMember2023-06-300001069157us-gaap:LoanOriginationCommitmentsMember2022-12-310001069157us-gaap:LetterOfCreditMember2023-06-300001069157us-gaap:LetterOfCreditMember2022-12-310001069157us-gaap:CommitmentsToExtendCreditMember2023-06-300001069157us-gaap:CommitmentsToExtendCreditMember2022-12-310001069157us-gaap:StandbyLettersOfCreditMember2023-06-300001069157ewbc:CommercialLettersOfCreditMember2023-06-300001069157us-gaap:StandbyLettersOfCreditMember2022-12-310001069157ewbc:CommercialLettersOfCreditMember2022-12-310001069157ewbc:SingleFamilyResidentialMemberewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMember2023-06-300001069157ewbc:SingleFamilyResidentialMemberewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMember2022-12-310001069157ewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMemberewbc:MultifamilyResidentialMember2023-06-300001069157ewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMemberewbc:MultifamilyResidentialMember2022-12-310001069157ewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMember2023-06-300001069157ewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMember2022-12-310001069157ewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMemberewbc:SingleFamilyResidentialAndMultiFamilyResidentialMember2023-06-300001069157ewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMemberewbc:SingleFamilyResidentialAndMultiFamilyResidentialMember2022-12-310001069157ewbc:CliffVestingMemberus-gaap:RestrictedStockUnitsRSUMember2023-01-012023-06-300001069157srt:MinimumMemberewbc:PerformanceBasedRestrictedStockSettledinStockMember2023-01-012023-06-300001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMembersrt:MaximumMember2023-01-012023-06-300001069157ewbc:CliffVestingMemberewbc:PerformanceBasedRestrictedStockSettledinStockMember2023-01-012023-06-300001069157ewbc:TimeBasedRestrictedStockSettledinStockMember2022-12-310001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMember2022-12-310001069157ewbc:TimeBasedRestrictedStockSettledinStockMember2023-01-012023-06-300001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMember2023-01-012023-06-300001069157ewbc:TimeBasedRestrictedStockSettledinStockMember2023-06-300001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMember2023-06-300001069157us-gaap:RestrictedStockUnitsRSUMember2023-04-012023-06-300001069157us-gaap:RestrictedStockUnitsRSUMember2023-01-012023-06-300001069157us-gaap:RestrictedStockUnitsRSUMember2022-04-012022-06-300001069157us-gaap:RestrictedStockUnitsRSUMember2022-01-012022-06-300001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-03-310001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-03-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2022-03-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-04-012022-06-300001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-04-012022-06-300001069157us-gaap:AccumulatedTranslationAdjustmentMember2022-04-012022-06-300001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-06-300001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-06-300001069157us-gaap:AccumulatedTranslationAdjustmentMember2022-06-300001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-03-310001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-03-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2023-03-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-04-012023-06-300001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-04-012023-06-300001069157us-gaap:AccumulatedTranslationAdjustmentMember2023-04-012023-06-300001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-06-300001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-06-300001069157us-gaap:AccumulatedTranslationAdjustmentMember2023-06-300001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-12-310001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-12-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2021-12-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-01-012022-06-300001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-01-012022-06-300001069157us-gaap:AccumulatedTranslationAdjustmentMember2022-01-012022-06-300001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-12-310001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-12-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2022-12-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-01-012023-06-300001069157us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-01-012023-06-300001069157us-gaap:AccumulatedTranslationAdjustmentMember2023-01-012023-06-300001069157ewbc:AccumulatedNetUnrealizedInvestmentGainLossExcludingTransferMember2022-01-012022-06-30ewbc:segment0001069157ewbc:ConsumerandBusinessBankingMember2023-04-012023-06-300001069157ewbc:CommercialBankingMember2023-04-012023-06-300001069157us-gaap:AllOtherSegmentsMember2023-04-012023-06-300001069157ewbc:ConsumerandBusinessBankingMember2023-06-300001069157ewbc:CommercialBankingMember2023-06-300001069157us-gaap:AllOtherSegmentsMember2023-06-300001069157ewbc:ConsumerandBusinessBankingMember2022-04-012022-06-300001069157ewbc:CommercialBankingMember2022-04-012022-06-300001069157us-gaap:AllOtherSegmentsMember2022-04-012022-06-300001069157ewbc:ConsumerandBusinessBankingMember2022-06-300001069157ewbc:CommercialBankingMember2022-06-300001069157us-gaap:AllOtherSegmentsMember2022-06-300001069157ewbc:ConsumerandBusinessBankingMember2023-01-012023-06-300001069157ewbc:CommercialBankingMember2023-01-012023-06-300001069157us-gaap:AllOtherSegmentsMember2023-01-012023-06-300001069157ewbc:ConsumerandBusinessBankingMember2022-01-012022-06-300001069157ewbc:CommercialBankingMember2022-01-012022-06-300001069157us-gaap:AllOtherSegmentsMember2022-01-012022-06-30

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

FORM 10-Q

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

For the quarterly period ended June 30, 2023

or

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

For the transition period from to

Commission file number 000-24939

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

Delaware
(State or other jurisdiction of incorporation or organization)

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

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

Registrant’s telephone number, including area code:
(626768-6000

Securities registered pursuant to Section 12(b) of the Act: 
Title of each classTrading
Symbol(s)
Name of each exchange
 on which registered
Common Stock, par value $0.001 per shareEWBCThe Nasdaq Global Select Market

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

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

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

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

    Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).
Yes  No 
    Number of shares outstanding of the issuer’s common stock on the latest practicable date: 141,483,668 shares as of July 31, 2023.



TABLE OF CONTENTS
Page
2


Forward-Looking Statements

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

There are various important factors that could cause future results to differ materially from historical performance and any forward-looking statements. Factors that might cause such differences, include, but are not limited to:

changes in the global economy, including an economic slowdown, capital or financial market disruption, supply chain disruption, level of inflation, interest rate environment, housing prices, employment levels, rate of growth and general business conditions, which could result in, among other things, reduced demand for loans, reduced availability of funding or increased funding costs, declines in asset values and/or recognition of allowance for credit losses;
changes in local, regional and global business, economic and political conditions and geopolitical events, such as Russia’s invasion of Ukraine;
the soundness of other financial institutions and the impacts related to or resulting from recent bank failures and other economic and industry volatility, including potential increased regulatory requirements, Federal Deposit Insurance Corporation (“FDIC”) insurance premiums, losses in the value of our investment portfolio, deposit withdrawals, or other adverse consequences of negative market perceptions of the banking industry or the Company;
changes in laws or the regulatory environment, including regulatory reform initiatives and policies of the U.S. Department of the Treasury, the Board of Governors of the Federal Reserve System (“Federal Reserve”), the FDIC, the SEC, the Consumer Financial Protection Bureau (“CFPB”), the California Department of Financial Protection and Innovation Division of Financial Institutions, the National Administration of Financial Regulation, the Hong Kong Monetary Authority, the Hong Kong Securities and Futures Commission, and the Monetary Authority of Singapore;
changes and effects thereof in trade, monetary and fiscal policies and laws, including the ongoing trade, economic and political disputes between the U.S. and the People’s Republic of China and the monetary policies of the Federal Reserve;
changes in the commercial and consumer real estate markets;
changes in consumer or commercial spending, savings and borrowing habits, and patterns and behaviors;
the impact from potential changes to income tax laws and regulations, federal spending and economic stimulus programs;
the impact of any future U.S. federal government shutdown and uncertainty regarding the U.S. federal government’s debt limit and credit rating;
the Company’s ability to compete effectively against financial institutions and other entities, including as a result of emerging technologies;
the success and timing of the Company’s business strategies;
the Company’s ability to retain key officers and employees;
the impact on the Company’s funding costs, net interest income and net interest margin from changes in key variable market interest rates, competition, regulatory requirements and the Company’s product mix;
changes in the Company’s costs of operation, compliance and expansion;
the Company’s ability to adopt and successfully integrate new technologies into its business in a strategic manner;

3


the impact of communications or technology disruption, failure in, or breach of, the Company’s operational or security systems or infrastructure, or those of third party vendors with which the Company does business, including as a result of cyber-attacks; and other similar matters which could result in, among other things, confidential and/or proprietary information being disclosed or misused, and materially impact the Company’s ability to provide services to its clients;
the adequacy of the Company’s risk management framework, disclosure controls and procedures and internal control over financial reporting;
future credit quality and performance, including the Company’s expectations regarding future credit losses and allowance levels;
the impact of adverse changes to the Company’s credit ratings from major credit rating agencies;
the impact of adverse judgments or settlements in litigation;
the impact of political developments, pandemics, wars, civil unrest, terrorism or other hostilities that may disrupt or increase volatility in securities or otherwise affect business and economic conditions on the Company and its customers;
heightened regulatory and governmental oversight and scrutiny of the Company’s business practices, including dealings with consumers;
the impact of reputational risk from negative publicity, fines, penalties and other negative consequences from regulatory violations, legal actions and the Company’s interactions with business partners, counterparties, service providers and other third parties;
the impact of regulatory investigations and enforcement actions;
changes in accounting standards as may be required by the Financial Accounting Standards Board (“FASB”) or other regulatory agencies and their impact on the Company’s critical accounting policies and assumptions;
the Company’s capital requirements and its ability to generate capital internally or raise capital on favorable terms;
the impact on the Company’s liquidity due to changes in the Company’s ability to receive dividends from its subsidiaries;
any strategic acquisitions or divestitures;
changes in the equity and debt securities markets;
fluctuations in the Company’s stock price;
fluctuations in foreign currency exchange rates;
the impact of increased focus on social, environmental and sustainability matters, which may affect the operations of the Company and its customers and the economy more broadly; and
the impact of climate change, natural or man-made disasters or calamities, such as wildfires, droughts, hurricanes, flooding and earthquakes or other events that may directly or indirectly result in a negative impact on the financial performance of the Company and its customers.

For a more detailed discussion of some of the factors that might cause such differences, see the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, filed with the SEC on February 27, 2023 (the “Company’s 2022 Form 10-K”) under the heading Item 1A. Risk Factors, and Item 1A. Risk Factors of this Form 10-Q. You should treat forward-looking statements as speaking only as of the date they are made and based only on information then actually known to the Company. The Company does not undertake, and specifically disclaims, any obligation to update or revise any forward-looking statements to reflect the occurrence of events or circumstances after the date of such statements except as required by law.
4


PART I — FINANCIAL INFORMATION
ITEM 1. CONSOLIDATED FINANCIAL STATEMENTS

EAST WEST BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEET
($ in thousands, except shares)
(Unaudited)
June 30,
2023
December 31,
2022
ASSETS
Cash and due from banks$614,053 $534,980 
Interest-bearing cash with banks5,763,834 2,946,804 
Cash and cash equivalents6,377,887 3,481,784 
Interest-bearing deposits with banks17,169 139,021 
Assets purchased under resale agreements (“resale agreements”)635,000 792,192 
Securities:
Available-for-sale (“AFS”) debt securities, at fair value (amortized cost of $6,820,569 and $6,879,225)
5,987,258 6,034,993 
Held-to-maturity (“HTM”) debt securities, at amortized cost (fair value of $2,440,484 and $2,455,171)
2,975,933 3,001,868 
Loans held-for-sale2,830 25,644 
Loans held-for-investment (net of allowance for loan losses of $635,400 and $595,645)
49,192,964 47,606,785 
Investments in qualified affordable housing partnerships, tax credit and other investments, net815,471 763,256 
Premises and equipment (net of accumulated depreciation of $153,079 and $148,126)
88,966 89,191 
Goodwill465,697 465,697 
Operating lease right-of-use assets100,500 103,681 
Other assets1,873,006 1,608,038 
TOTAL$68,532,681 $64,112,150 
LIABILITIES
Deposits:
Noninterest-bearing$16,741,099 $21,051,090 
Interest-bearing38,917,687 34,916,759 
Total deposits55,658,786 55,967,849 
Short-term borrowings4,500,000  
Assets sold under repurchase agreements (“repurchase agreements”) 300,000 
Long-term debt and finance lease liabilities152,951 152,400 
Operating lease liabilities110,383 111,931 
Accrued expenses and other liabilities1,648,864 1,595,358 
Total liabilities62,070,984 58,127,538 
COMMITMENTS AND CONTINGENCIES (Note 11)
STOCKHOLDERS’ EQUITY
Common stock, $0.001 par value, 200,000,000 shares authorized; 169,310,864 and 168,459,045 shares issued
169 168 
Additional paid-in capital1,959,615 1,936,389 
Retained earnings6,075,735 5,582,546 
Treasury stock, at cost 27,827,196 and 27,511,199 shares
(791,890)(768,862)
Accumulated other comprehensive loss (“AOCI”), net of tax(781,932)(765,629)
Total stockholders’ equity6,461,697 5,984,612 
TOTAL$68,532,681 $64,112,150 
See accompanying Notes to Consolidated Financial Statements.

5


EAST WEST BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF INCOME
($ and shares in thousands, except per share data)
(Unaudited)
Three Months Ended June 30,Six Months Ended June 30,
2023202220232022
INTEREST AND DIVIDEND INCOME
Loans receivable, including fees$771,264 $439,416 $1,499,650 $816,526 
Debt securities68,970 46,176 134,901 88,843 
Resale agreements3,969 8,553 8,472 16,936 
Restricted equity securities936 822 1,975 1,431 
Interest-bearing cash and deposits with banks60,995 4,787 96,642 8,047 
Total interest and dividend income906,134 499,754 1,741,640 931,783 
INTEREST EXPENSE
Deposits287,477 22,488 504,271 35,477 
Federal funds purchased and other short-term borrowings49,032 241 57,857 250 
Federal Home Loan Bank (“FHLB”) advances 559 6,430 1,137 
Repurchase agreements211 2,418 1,263 4,434 
Long-term debt and finance lease liabilities2,668 1,096 5,212 1,920 
Total interest expense339,388 26,802 575,033 43,218 
Net interest income before provision for credit losses566,746 472,952 1,166,607 888,565 
Provision for credit losses26,000 13,500 46,000 21,500 
Net interest income after provision for credit losses540,746 459,452 1,120,607 867,065 
NONINTEREST INCOME
Lending fees20,901 20,142 41,487 39,580 
Deposit account fees22,285 22,372 43,988 42,687 
Interest rate contracts and other derivative income7,373 9,801 9,937 20,934 
Foreign exchange income13,251 11,361 25,911 24,060 
Wealth management fees6,889 6,539 13,193 12,591 
Net (losses) gains on sales of loans(7)917 (29)3,839 
Net gains (losses) on AFS debt securities 28 (10,000)1,306 
Other investment income4,003 4,863 5,924 6,490 
Other income3,936 2,421 8,198 6,700 
Total noninterest income78,631 78,444 138,609 158,187 
NONINTEREST EXPENSE
Compensation and employee benefits124,937 113,364 254,591 229,633 
Occupancy and equipment expense16,088 15,469 31,675 30,933 
Deposit insurance premiums and regulatory assessments8,262 4,927 16,172 9,644 
Deposit account expense10,559 5,671 20,168 10,364 
Data processing3,213 3,486 6,560 7,151 
Computer software expense7,479 6,572 14,839 13,866 
Other operating expense35,337 32,392 70,207 55,840 
Amortization of tax credit and other investments55,914 14,979 66,024 28,879 
Total noninterest expense261,789 196,860 480,236 386,310 
INCOME BEFORE INCOME TAXES357,588 341,036 778,980 638,942 
INCOME TAX EXPENSE45,557 82,707 144,510 142,961 
NET INCOME$312,031 $258,329 $634,470 $495,981 
EARNINGS PER SHARE (“EPS”)
BASIC$2.21 $1.83 $4.49 $3.50 
DILUTED$2.20 $1.81 $4.47 $3.47 
WEIGHTED-AVERAGE NUMBER OF SHARES OUTSTANDING
BASIC141,468 141,429 141,291 141,725 
DILUTED141,876 142,372 141,910 142,838 
See accompanying Notes to Consolidated Financial Statements.

6


EAST WEST BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS)
($ in thousands)
(Unaudited)
Three Months Ended June 30,Six Months Ended June 30,
2023202220232022
Net income$312,031 $258,329 $634,470 $495,981 
Other comprehensive loss, net of tax:
Net changes in unrealized (losses) gains on AFS debt securities(43,618)(192,878)7,701 (362,148)
Reclassification of unrealized losses on debt securities transferred from AFS to HTM   (112,991)
Amortization of unrealized losses on debt securities transferred from AFS to HTM2,816 3,750 5,578 6,061 
Net changes in unrealized losses on cash flow hedges(53,887)(6,380)(25,274)(31,103)
Foreign currency translation adjustments(7,249)(10,215)(4,308)(10,086)
Other comprehensive loss(101,938)(205,723)(16,303)(510,267)
COMPREHENSIVE INCOME (LOSS)$210,093 $52,606 $618,167 $(14,286)
See accompanying Notes to Consolidated Financial Statements.

7


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

Common Stock and Additional Paid-in CapitalRetained EarningsTreasury StockAOCI, Net of TaxTotal Stockholders’ Equity
SharesAmount
BALANCE, APRIL 1, 2022142,256,520 $1,903,042 $4,863,721 $(668,382)$(394,925)$5,703,456 
Net income— — 258,329 — — 258,329 
Other comprehensive loss— — — — (205,723)(205,723)
Issuance of common stock pursuant to various stock compensation plans and agreements51,733 11,190 — — — 11,190 
Repurchase of common stock pursuant to various stock compensation plans and agreements(5,347)— — (380)— (380)
Repurchase of common stock pursuant to the Stock Repurchase Program(1,385,517)— — (99,990)— (99,990)
Cash dividends on common stock ($0.40 per share)
— — (57,400)— — (57,400)
BALANCE, JUNE 30, 2022140,917,389 $1,914,232 $5,064,650 $(768,752)$(600,648)$5,609,482 
BALANCE, APRIL 1, 2023141,395,800 $1,947,687 $5,832,291 $(790,653)$(679,994)$6,309,331 
Net income— — 312,031 — — 312,031 
Other comprehensive loss— — — — (101,938)(101,938)
Issuance of common stock pursuant to various stock compensation plans and agreements111,097 12,097 — — — 12,097 
Repurchase of common stock pursuant to various stock compensation plans and agreements(23,229)— — (1,237)— (1,237)
Cash dividends on common stock ($0.48 per share)
— — (68,587)— — (68,587)
BALANCE, JUNE 30, 2023141,483,668 $1,959,784 $6,075,735 $(791,890)$(781,932)$6,461,697