000106915712/312021Q1falseus-gaap:AccountingStandardsUpdate201613Member00010691572021-01-012021-03-31xbrli:shares00010691572021-04-30iso4217:USD00010691572021-03-3100010691572020-12-31iso4217:USDxbrli:shares00010691572020-01-012020-03-310001069157us-gaap:CommonStockMember2019-12-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2019-12-310001069157us-gaap:RetainedEarningsMember2019-12-310001069157us-gaap:TreasuryStockMember2019-12-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-12-3100010691572019-12-310001069157us-gaap:AccountingStandardsUpdate201613Member2019-01-012019-03-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201613Memberus-gaap:RetainedEarningsMember2019-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201613Member2019-12-310001069157us-gaap:RetainedEarningsMember2020-01-012020-03-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-01-012020-03-310001069157us-gaap:CommonStockMember2020-01-012020-03-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2020-01-012020-03-310001069157us-gaap:TreasuryStockMember2020-01-012020-03-310001069157us-gaap:CommonStockMember2020-03-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2020-03-310001069157us-gaap:RetainedEarningsMember2020-03-310001069157us-gaap:TreasuryStockMember2020-03-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-03-3100010691572020-03-310001069157us-gaap:CommonStockMember2020-12-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2020-12-310001069157us-gaap:RetainedEarningsMember2020-12-310001069157us-gaap:TreasuryStockMember2020-12-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-12-310001069157us-gaap:RetainedEarningsMember2021-01-012021-03-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-01-012021-03-310001069157us-gaap:CommonStockMember2021-01-012021-03-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2021-01-012021-03-310001069157us-gaap:TreasuryStockMember2021-01-012021-03-310001069157us-gaap:CommonStockMember2021-03-310001069157us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2021-03-310001069157us-gaap:RetainedEarningsMember2021-03-310001069157us-gaap:TreasuryStockMember2021-03-310001069157us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-03-31ewbc:trust0001069157us-gaap:FairValueInputsLevel1Memberus-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-03-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-03-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2021-03-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2021-03-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberewbc:ForeignGovernmentBondsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberewbc:ForeignGovernmentBondsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157ewbc:ForeignGovernmentBondsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157ewbc:ForeignGovernmentBondsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2021-03-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2021-03-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:CreditRiskContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:EquityContractMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2020-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2020-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberewbc:ForeignGovernmentBondsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberewbc:ForeignGovernmentBondsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157ewbc:ForeignGovernmentBondsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157ewbc:ForeignGovernmentBondsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2020-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2020-12-310001069157us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedLoanObligationsMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:EquityContractMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001069157us-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-01-012021-03-310001069157us-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-01-012020-03-310001069157us-gaap:EquityContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-03-310001069157us-gaap:EquityContractMemberewbc:LendingfeesMember2021-01-012021-03-310001069157us-gaap:EquityContractMemberewbc:LendingfeesMember2020-01-012020-03-310001069157us-gaap:FairValueMeasurementsRecurringMember2021-01-012021-03-31xbrli:pure0001069157srt:MinimumMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:EquityContractMemberewbc:BlackScholesOptionPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157srt:MaximumMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:EquityContractMemberewbc:BlackScholesOptionPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:MeasurementInputPriceVolatilityMemberus-gaap:EquityContractMembersrt:WeightedAverageMemberewbc:BlackScholesOptionPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:EquityContractMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157us-gaap:EquityContractMembersrt:WeightedAverageMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001069157srt:MinimumMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:EquityContractMemberewbc:BlackScholesOptionPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157srt:MaximumMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:EquityContractMemberewbc:BlackScholesOptionPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:MeasurementInputPriceVolatilityMemberus-gaap:EquityContractMembersrt:WeightedAverageMemberewbc:BlackScholesOptionPricingModelMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:EquityContractMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:EquityContractMembersrt:WeightedAverageMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-03-310001069157us-gaap:FairValueInputsLevel1Memberewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:CommercialRealEstateMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:CommercialRealEstateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberewbc:MultifamilyResidentialMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157ewbc:MultifamilyResidentialMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157ewbc:MultifamilyResidentialMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157ewbc:MultifamilyResidentialMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:HomeEquityMemberus-gaap:FairValueInputsLevel1Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:HomeEquityMemberus-gaap:FairValueInputsLevel2Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:HomeEquityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:HomeEquityMemberus-gaap:FairValueInputsLevel1Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:HomeEquityMemberus-gaap:FairValueInputsLevel2Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:HomeEquityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:OtherConsumerMemberus-gaap:FairValueInputsLevel2Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:OtherConsumerMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberewbc:OtherRealEstateOwnedMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberewbc:OtherRealEstateOwnedMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:OtherRealEstateOwnedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:OtherRealEstateOwnedMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:LoansReceivableMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-03-310001069157us-gaap:LoansReceivableMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-01-012020-03-310001069157us-gaap:CommercialRealEstateMemberus-gaap:LoansReceivableMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-03-310001069157us-gaap:CommercialRealEstateMemberus-gaap:LoansReceivableMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-01-012020-03-310001069157us-gaap:LoansReceivableMemberewbc:MultifamilyResidentialMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-03-310001069157us-gaap:LoansReceivableMemberewbc:MultifamilyResidentialMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-01-012020-03-310001069157us-gaap:LoansReceivableMemberewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-03-310001069157us-gaap:LoansReceivableMemberewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-01-012020-03-310001069157us-gaap:LoansReceivableMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-03-310001069157us-gaap:LoansReceivableMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-01-012020-03-310001069157us-gaap:HomeEquityMemberus-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-03-310001069157us-gaap:HomeEquityMemberus-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-01-012020-03-310001069157ewbc:OtherConsumerMemberus-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-03-310001069157ewbc:OtherConsumerMemberus-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-01-012020-03-310001069157us-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-03-310001069157us-gaap:LoansReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-01-012020-03-310001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-03-310001069157us-gaap:LoansReceivableMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-01-012020-03-310001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-03-310001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-01-012020-03-310001069157ewbc:OtherNonperformingAssetsMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-03-310001069157ewbc:OtherNonperformingAssetsMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-01-012020-03-310001069157us-gaap:IncomeApproachValuationTechniqueMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157srt:MinimumMemberus-gaap:IncomeApproachValuationTechniqueMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157srt:MaximumMemberus-gaap:IncomeApproachValuationTechniqueMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:IncomeApproachValuationTechniqueMemberus-gaap:MeasurementInputDiscountRateMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157ewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157srt:MinimumMemberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157srt:MaximumMemberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:MeasurementInputDiscountRateMembersrt:WeightedAverageMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157ewbc:ValuationTechniqueFairValueOfCollateralContractValueMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157srt:MinimumMemberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157srt:MaximumMemberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157srt:WeightedAverageMemberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310001069157us-gaap:IncomeApproachValuationTechniqueMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157srt:MinimumMemberus-gaap:IncomeApproachValuationTechniqueMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157srt:MaximumMemberus-gaap:IncomeApproachValuationTechniqueMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:IncomeApproachValuationTechniqueMemberus-gaap:MeasurementInputDiscountRateMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157srt:MinimumMemberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157srt:MaximumMemberus-gaap:MeasurementInputDiscountRateMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:MeasurementInputDiscountRateMembersrt:WeightedAverageMemberewbc:ValuationTechniqueFairValueOfCollateralDiscountMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:ValuationTechniqueFairValueOfCollateralContractValueMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157srt:MinimumMemberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157srt:MaximumMemberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157srt:WeightedAverageMemberus-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMemberewbc:ValuationTechniqueIndividualAnalysisMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157ewbc:OtherRealEstateOwnedMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:MeasurementInputCostToSellMemberewbc:ValuationTechniqueFairValueOfValuationTechniqueFairValueOfPropertySellingCostMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310001069157us-gaap:CarryingReportedAmountFairValueDisclosureMember2021-03-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310001069157us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2021-03-310001069157us-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310001069157us-gaap:CarryingReportedAmountFairValueDisclosureMember2020-12-310001069157us-gaap:FairValueInputsLevel1Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310001069157us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310001069157us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2020-12-310001069157us-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310001069157ewbc:SecuritiesPurchasedUnderResaleAgreementsMember2021-01-012021-03-310001069157ewbc:SecuritiesPurchasedUnderResaleAgreementsMember2020-01-012020-03-310001069157ewbc:LoansPurchasedUnderResaleAgreementsMember2021-01-012021-03-310001069157us-gaap:USTreasurySecuritiesMember2021-03-310001069157us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2021-03-310001069157ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2021-03-310001069157ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2021-03-310001069157us-gaap:USStatesAndPoliticalSubdivisionsMember2021-03-310001069157us-gaap:CommercialMortgageBackedSecuritiesMember2021-03-310001069157us-gaap:ResidentialMortgageBackedSecuritiesMember2021-03-310001069157us-gaap:CorporateDebtSecuritiesMember2021-03-310001069157ewbc:ForeignGovernmentBondsMember2021-03-310001069157us-gaap:AssetBackedSecuritiesMember2021-03-310001069157us-gaap:CollateralizedLoanObligationsMember2021-03-310001069157us-gaap:USTreasurySecuritiesMember2020-12-310001069157us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2020-12-310001069157ewbc:CommercialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2020-12-310001069157ewbc:ResidentialMortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2020-12-310001069157us-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310001069157us-gaap:CommercialMortgageBackedSecuritiesMember2020-12-310001069157us-gaap:ResidentialMortgageBackedSecuritiesMember2020-12-310001069157us-gaap:CorporateDebtSecuritiesMember2020-12-310001069157ewbc:ForeignGovernmentBondsMember2020-12-310001069157us-gaap:AssetBackedSecuritiesMember2020-12-310001069157us-gaap:CollateralizedLoanObligationsMember2020-12-310001069157us-gaap:AvailableforsaleSecuritiesMember2021-03-310001069157us-gaap:AvailableforsaleSecuritiesMember2020-12-31ewbc:security0001069157ewbc:MortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2021-03-3100010691572020-01-012020-12-310001069157ewbc:MortgageBackedSecuritiesIssuedByUSGovernmentAgenciesAndGovernmentSponsoredEnterpriseMember2020-12-310001069157us-gaap:AvailableforsaleSecuritiesMember2021-01-012021-03-310001069157us-gaap:AvailableforsaleSecuritiesMember2020-01-012020-03-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-03-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-03-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310001069157us-gaap:DesignatedAsHedgingInstrumentMember2021-03-310001069157us-gaap:DesignatedAsHedgingInstrumentMember2020-12-310001069157us-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:CreditRiskContractMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:EquityContractMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:EquityContractMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:CommodityContractMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:CommodityContractMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:NondesignatedMember2021-03-310001069157us-gaap:NondesignatedMember2020-12-31ewbc:company0001069157ewbc:EquityPrivateCompaniesMemberus-gaap:NondesignatedMember2021-03-310001069157ewbc:EquityPublicCompaniesMemberus-gaap:NondesignatedMember2020-12-310001069157ewbc:EquityPrivateCompaniesMemberus-gaap:NondesignatedMember2020-12-31utr:Boe0001069157srt:CrudeOilMemberewbc:CustomerCounterpartyMember2021-01-012021-03-31utr:MMBTU0001069157srt:NaturalGasReservesMemberewbc:CustomerCounterpartyMember2021-01-012021-03-310001069157srt:CrudeOilMemberewbc:CustomerCounterpartyMember2020-01-012020-12-310001069157srt:NaturalGasReservesMemberewbc:CustomerCounterpartyMember2020-01-012020-12-310001069157us-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310001069157us-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-03-310001069157us-gaap:DepositsMemberus-gaap:InterestExpenseMemberus-gaap:FairValueHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-01-012021-03-310001069157us-gaap:InterestExpenseMemberus-gaap:FairValueHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-01-012021-03-310001069157us-gaap:InterestExpenseMemberus-gaap:FairValueHedgingMemberus-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-01-012020-03-310001069157us-gaap:InterestExpenseMemberus-gaap:FairValueHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-01-012020-03-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-01-012021-03-310001069157us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-01-012020-03-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-01-012021-03-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-01-012020-03-310001069157us-gaap:InterestRateContractMemberewbc:WrittenOptionMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:InterestRateContractMemberewbc:PurchasedOptionsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:InterestRateContractMemberewbc:SoldCollarsandCorridorsMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:InterestRateContractMemberewbc:CollarsandCorridorsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:InterestRateContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:SwapMember2021-03-310001069157us-gaap:InterestRateContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:SwapMember2021-03-310001069157us-gaap:InterestRateContractMemberus-gaap:InterestRateContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:InterestRateContractMemberus-gaap:InterestRateContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:InterestRateContractMemberewbc:WrittenOptionMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:InterestRateContractMemberewbc:PurchasedOptionsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:InterestRateContractMemberewbc:SoldCollarsandCorridorsMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:InterestRateContractMemberewbc:CollarsandCorridorsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:InterestRateContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:SwapMember2020-12-310001069157us-gaap:InterestRateContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:SwapMember2020-12-310001069157us-gaap:InterestRateContractMemberus-gaap:InterestRateContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:InterestRateContractMemberus-gaap:InterestRateContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:InterestRateContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157ewbc:LondonClearingHouseMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:InterestRateContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2020-12-310001069157ewbc:LondonClearingHouseMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2020-12-310001069157srt:MaximumMemberus-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMember2021-01-012021-03-310001069157srt:MaximumMemberus-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMember2020-01-012020-12-310001069157ewbc:ForwardsandSpotsMemberus-gaap:ForeignExchangeContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157ewbc:ForwardsandSpotsMemberus-gaap:ForeignExchangeContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:ForeignExchangeContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:SwapMember2021-03-310001069157us-gaap:ForeignExchangeContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:SwapMember2021-03-310001069157ewbc:WrittenOptionMemberus-gaap:ForeignExchangeContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:ForeignExchangeContractMemberewbc:PurchasedOptionsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157ewbc:CollarsMemberus-gaap:ForeignExchangeContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157ewbc:CollarsMemberus-gaap:ForeignExchangeContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:ForeignExchangeContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:ForeignExchangeContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2021-03-310001069157ewbc:ForwardsandSpotsMemberus-gaap:ForeignExchangeContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMember2020-12-310001069157ewbc:ForwardsandSpotsMemberus-gaap:ForeignExchangeContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:ForeignExchangeContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:SwapMember2020-12-310001069157us-gaap:ForeignExchangeContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:SwapMember2020-12-310001069157ewbc:WrittenOptionMemberus-gaap:ForeignExchangeContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:ForeignExchangeContractMemberewbc:PurchasedOptionsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:ForeignExchangeContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:ForeignExchangeContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:ShortMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:CreditRiskContractMemberus-gaap:ShortMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:ShortMemberus-gaap:NondesignatedMember2021-01-012021-03-310001069157us-gaap:CreditRiskContractMemberus-gaap:ShortMemberus-gaap:NondesignatedMember2020-01-012020-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:ShortMemberus-gaap:OtherCreditDerivativesMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:CreditRiskContractMemberus-gaap:ShortMemberus-gaap:OtherCreditDerivativesMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:LongMemberus-gaap:OtherCreditDerivativesMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:CreditRiskContractMemberus-gaap:LongMemberus-gaap:OtherCreditDerivativesMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:CreditRiskContractMemberus-gaap:OtherCreditDerivativesMemberus-gaap:NondesignatedMember2021-03-310001069157us-gaap:CreditRiskContractMemberus-gaap:OtherCreditDerivativesMemberus-gaap:NondesignatedMember2020-12-310001069157srt:CrudeOilMemberewbc:WrittenOptionMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-01-012021-03-310001069157srt:CrudeOilMemberewbc:WrittenOptionMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157srt:CrudeOilMemberewbc:PurchasedOptionsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-01-012021-03-310001069157srt:CrudeOilMemberewbc:PurchasedOptionsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157srt:CrudeOilMemberewbc:CollarsMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-01-012021-03-310001069157srt:CrudeOilMemberewbc:CollarsMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157srt:CrudeOilMemberewbc:CollarsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-01-012021-03-310001069157srt:CrudeOilMemberewbc:CollarsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157srt:CrudeOilMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2021-01-012021-03-310001069157srt:CrudeOilMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2021-03-310001069157srt:CrudeOilMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2021-01-012021-03-310001069157srt:CrudeOilMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2021-03-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-01-012021-03-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-01-012021-03-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157srt:NaturalGasReservesMemberewbc:WrittenOptionMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-01-012021-03-310001069157srt:NaturalGasReservesMemberewbc:WrittenOptionMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157srt:NaturalGasReservesMemberewbc:PurchasedOptionsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-01-012021-03-310001069157srt:NaturalGasReservesMemberewbc:PurchasedOptionsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-01-012021-03-310001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-01-012021-03-310001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157srt:NaturalGasReservesMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2021-01-012021-03-310001069157srt:NaturalGasReservesMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2021-03-310001069157srt:NaturalGasReservesMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2021-01-012021-03-310001069157srt:NaturalGasReservesMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2021-03-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-01-012021-03-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-01-012021-03-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157us-gaap:CommodityContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157us-gaap:CommodityContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2021-03-310001069157srt:CrudeOilMemberewbc:CollarsMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-01-012020-12-310001069157srt:CrudeOilMemberewbc:CollarsMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-12-310001069157srt:CrudeOilMemberewbc:CollarsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-01-012020-12-310001069157srt:CrudeOilMemberewbc:CollarsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-12-310001069157srt:CrudeOilMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2020-01-012020-12-310001069157srt:CrudeOilMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2020-12-310001069157srt:CrudeOilMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2020-01-012020-12-310001069157srt:CrudeOilMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2020-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-01-012020-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-01-012020-12-310001069157srt:CrudeOilMemberus-gaap:CommodityContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-12-310001069157srt:NaturalGasReservesMemberewbc:WrittenOptionMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-01-012020-12-310001069157srt:NaturalGasReservesMemberewbc:WrittenOptionMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-12-310001069157srt:NaturalGasReservesMemberewbc:PurchasedOptionsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-01-012020-12-310001069157srt:NaturalGasReservesMemberewbc:PurchasedOptionsMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-12-310001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-01-012020-12-310001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-12-310001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-01-012020-12-310001069157ewbc:CollarsMembersrt:NaturalGasReservesMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-12-310001069157srt:NaturalGasReservesMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2020-01-012020-12-310001069157srt:NaturalGasReservesMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2020-12-310001069157srt:NaturalGasReservesMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2020-01-012020-12-310001069157srt:NaturalGasReservesMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMemberus-gaap:SwapMember2020-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-01-012020-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-01-012020-12-310001069157srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-12-310001069157us-gaap:CommodityContractMemberewbc:CustomerCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-12-310001069157us-gaap:CommodityContractMemberewbc:FinancialCounterpartyMemberus-gaap:NondesignatedMemberus-gaap:CommodityContractMember2020-12-310001069157ewbc:ChicagoMercantileExchangeCMEMembersrt:OilReservesMemberus-gaap:CommodityContractMemberus-gaap:NondesignatedMember2021-01-012021-03-310001069157ewbc:ChicagoMercantileExchangeCMEMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NondesignatedMember2021-01-012021-03-310001069157ewbc:ChicagoMercantileExchangeCMEMemberus-gaap:CommodityContractMemberus-gaap:NondesignatedMember2021-03-310001069157ewbc:ChicagoMercantileExchangeCMEMembersrt:OilReservesMemberus-gaap:CommodityContractMemberus-gaap:NondesignatedMember2020-01-012020-12-310001069157ewbc:ChicagoMercantileExchangeCMEMembersrt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:NondesignatedMember2020-01-012020-12-310001069157ewbc:ChicagoMercantileExchangeCMEMemberus-gaap:CommodityContractMemberus-gaap:NondesignatedMember2020-12-310001069157us-gaap:InterestRateContractMemberewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:NondesignatedMember2021-01-012021-03-310001069157us-gaap:InterestRateContractMemberewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:NondesignatedMember2020-01-012020-03-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMemberus-gaap:ForeignCurrencyGainLossMember2021-01-012021-03-310001069157us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMemberus-gaap:ForeignCurrencyGainLossMember2020-01-012020-03-310001069157us-gaap:CreditRiskContractMemberewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:NondesignatedMember2021-01-012021-03-310001069157us-gaap:CreditRiskContractMemberewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:NondesignatedMember2020-01-012020-03-310001069157us-gaap:EquityContractMemberewbc:LendingfeesMemberus-gaap:NondesignatedMember2021-01-012021-03-310001069157us-gaap:EquityContractMemberewbc:LendingfeesMemberus-gaap:NondesignatedMember2020-01-012020-03-310001069157ewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:CommodityContractMemberus-gaap:NondesignatedMember2021-01-012021-03-310001069157ewbc:InterestratecontractsandotherderivativeincomeMemberus-gaap:CommodityContractMemberus-gaap:NondesignatedMember2020-01-012020-03-310001069157us-gaap:NondesignatedMember2021-01-012021-03-310001069157us-gaap:NondesignatedMember2020-01-012020-03-310001069157ewbc:CreditRiskRelatedContingentFeaturesMember2021-03-310001069157ewbc:CreditRiskRelatedContingentFeaturesMember2020-12-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157srt:MultifamilyMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157srt:MultifamilyMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157ewbc:TotalCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157ewbc:TotalCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157us-gaap:CommercialPortfolioSegmentMember2021-03-310001069157us-gaap:CommercialPortfolioSegmentMember2020-12-310001069157srt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157srt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMember2021-03-310001069157us-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMember2020-12-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157us-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157ewbc:CommercialAndIndustrialLoanMemberewbc:CARESActPaycheckProtectionProgramMember2021-03-310001069157ewbc:CommercialAndIndustrialLoanMemberewbc:CARESActPaycheckProtectionProgramMember2020-12-310001069157ewbc:CARESActPaycheckProtectionProgramMember2021-03-310001069157ewbc:CARESActPaycheckProtectionProgramMember2020-12-310001069157us-gaap:PassMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157ewbc:CriticizedAccrualMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157ewbc:CommercialAndIndustrialLoanMemberewbc:CriticizedNonaccrualMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157us-gaap:CommercialRealEstateMemberus-gaap:PassMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157ewbc:CriticizedAccrualMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157us-gaap:CommercialRealEstateMemberewbc:CriticizedNonaccrualMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157srt:MultifamilyMemberus-gaap:PassMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157srt:MultifamilyMemberewbc:CriticizedAccrualMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157srt:MultifamilyMemberus-gaap:RealEstateLoanMemberewbc:CriticizedNonaccrualMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157us-gaap:PassMemberewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157ewbc:CriticizedAccrualMemberewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157ewbc:ConstructionAndLandLoanMemberewbc:CriticizedNonaccrualMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157srt:SingleFamilyMemberus-gaap:PassMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157ewbc:CriticizedAccrualMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157srt:SingleFamilyMemberus-gaap:RealEstateLoanMemberewbc:CriticizedNonaccrualMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157us-gaap:HomeEquityMemberus-gaap:PassMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157ewbc:CriticizedAccrualMemberus-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157us-gaap:HomeEquityMemberewbc:CriticizedNonaccrualMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157ewbc:OtherConsumerMemberus-gaap:PassMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157ewbc:OtherConsumerMemberewbc:CriticizedNonaccrualMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157us-gaap:PassMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157ewbc:CriticizedAccrualMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157ewbc:CommercialAndIndustrialLoanMemberewbc:CriticizedNonaccrualMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:PassMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157ewbc:CriticizedAccrualMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157us-gaap:CommercialRealEstateMemberewbc:CriticizedNonaccrualMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157srt:MultifamilyMemberus-gaap:PassMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157srt:MultifamilyMemberewbc:CriticizedAccrualMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157srt:MultifamilyMemberus-gaap:RealEstateLoanMemberewbc:CriticizedNonaccrualMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157us-gaap:PassMemberewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157ewbc:CriticizedAccrualMemberewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157ewbc:ConstructionAndLandLoanMemberewbc:CriticizedNonaccrualMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157srt:SingleFamilyMemberus-gaap:PassMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157ewbc:CriticizedAccrualMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157srt:SingleFamilyMemberus-gaap:RealEstateLoanMemberewbc:CriticizedNonaccrualMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:HomeEquityMemberus-gaap:PassMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157ewbc:CriticizedAccrualMemberus-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:HomeEquityMemberewbc:CriticizedNonaccrualMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157ewbc:OtherConsumerMemberus-gaap:PassMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157ewbc:CriticizedAccrualMemberewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157ewbc:OtherConsumerMemberewbc:CriticizedNonaccrualMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:FederalHousingAdministrationLoanMember2021-03-310001069157us-gaap:FederalHousingAdministrationLoanMember2020-12-310001069157us-gaap:HomeEquityMember2021-01-012021-03-310001069157us-gaap:HomeEquityMember2020-01-012020-03-310001069157ewbc:CommercialAndIndustrialLoanMember2020-01-012020-03-310001069157ewbc:CommercialAndIndustrialLoanMember2021-01-012021-03-31ewbc:loan0001069157us-gaap:CommercialRealEstateMember2021-01-012021-03-310001069157us-gaap:CommercialRealEstateMember2020-01-012020-03-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157us-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157srt:MultifamilyMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157srt:MultifamilyMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157ewbc:TotalCommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberewbc:TotalCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2021-03-310001069157srt:SingleFamilyMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157us-gaap:HomeEquityMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157us-gaap:HomeEquityMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMember2021-03-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMember2021-03-310001069157ewbc:OtherConsumerMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMember2021-03-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMember2021-03-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157srt:MultifamilyMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157srt:MultifamilyMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157ewbc:TotalCommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberewbc:TotalCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310001069157srt:SingleFamilyMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMembersrt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:HomeEquityMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:HomeEquityMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMember2020-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberewbc:TotalResidentialMortgageMember2020-12-310001069157ewbc:OtherConsumerMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310001069157us-gaap:FinancingReceivables30To59DaysPastDueMember2020-12-310001069157us-gaap:FinancingReceivables60To89DaysPastDueMember2020-12-310001069157us-gaap:ResidentialRealEstateMember2021-03-310001069157us-gaap:ResidentialRealEstateMember2020-12-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-01-012021-03-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-01-012020-03-310001069157ewbc:CommercialAndIndustrialLoanMemberewbc:PrincipalForbearancePaymentsTermExtensionsPrincipalDefermentsMemberus-gaap:CommercialPortfolioSegmentMember2021-01-012021-03-310001069157ewbc:CommercialAndIndustrialLoanMemberewbc:PrincipalAndInterestDefermentsOrReductionsMemberus-gaap:CommercialPortfolioSegmentMember2021-01-012021-03-310001069157ewbc:CommercialAndIndustrialLoanMemberewbc:PrincipalForbearancePaymentsTermExtensionsPrincipalDefermentsMemberus-gaap:CommercialPortfolioSegmentMember2020-01-012020-03-310001069157ewbc:CommercialAndIndustrialLoanMemberewbc:PrincipalAndInterestDefermentsOrReductionsMemberus-gaap:CommercialPortfolioSegmentMember2020-01-012020-03-310001069157ewbc:PrincipalForbearancePaymentsTermExtensionsPrincipalDefermentsMember2021-01-012021-03-310001069157ewbc:PrincipalAndInterestDefermentsOrReductionsMember2021-01-012021-03-310001069157ewbc:PrincipalForbearancePaymentsTermExtensionsPrincipalDefermentsMember2020-01-012020-03-310001069157ewbc:PrincipalAndInterestDefermentsOrReductionsMember2020-01-012020-03-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2021-01-012021-03-310001069157srt:MultifamilyMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-01-012021-03-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2021-01-012021-03-310001069157srt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2021-01-012021-03-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2021-01-012021-03-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2021-01-012021-03-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001069157srt:MultifamilyMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310001069157srt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2019-12-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2019-12-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2019-12-310001069157ewbc:CommercialAndIndustrialLoanMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201613Memberus-gaap:CommercialPortfolioSegmentMember2019-12-310001069157us-gaap:CommercialRealEstateMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201613Memberus-gaap:CommercialPortfolioSegmentMember2019-12-310001069157srt:MultifamilyMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:RealEstateLoanMemberus-gaap:AccountingStandardsUpdate201613Memberus-gaap:CommercialPortfolioSegmentMember2019-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberewbc:ConstructionAndLandLoanMemberus-gaap:AccountingStandardsUpdate201613Memberus-gaap:CommercialPortfolioSegmentMember2019-12-310001069157srt:SingleFamilyMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:RealEstateLoanMemberus-gaap:AccountingStandardsUpdate201613Memberus-gaap:ConsumerPortfolioSegmentMember2019-12-310001069157us-gaap:HomeEquityMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201613Memberus-gaap:ConsumerPortfolioSegmentMember2019-12-310001069157ewbc:OtherConsumerMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201613Memberus-gaap:ConsumerPortfolioSegmentMember2019-12-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2020-01-012020-03-310001069157srt:MultifamilyMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-01-012020-03-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-01-012020-03-310001069157srt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-03-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-03-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-03-310001069157ewbc:CommercialAndIndustrialLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-03-310001069157us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2020-03-310001069157srt:MultifamilyMemberus-gaap:RealEstateLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-03-310001069157ewbc:ConstructionAndLandLoanMemberus-gaap:CommercialPortfolioSegmentMember2020-03-310001069157srt:SingleFamilyMemberus-gaap:RealEstateLoanMemberus-gaap:ConsumerPortfolioSegmentMember2020-03-310001069157us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2020-03-310001069157ewbc:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-03-310001069157us-gaap:UnfundedLoanCommitmentMember2020-12-310001069157us-gaap:UnfundedLoanCommitmentMember2019-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-12-310001069157srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-12-310001069157us-gaap:UnfundedLoanCommitmentMember2021-01-012021-03-310001069157us-gaap:UnfundedLoanCommitmentMember2020-01-012020-03-310001069157us-gaap:UnfundedLoanCommitmentMember2021-03-310001069157us-gaap:UnfundedLoanCommitmentMember2020-03-310001069157ewbc:CommercialandConsumerPortfolioSegmentMember2021-01-012021-03-310001069157ewbc:SingleFamilyResidentialMemberus-gaap:RealEstateLoanMember2021-03-310001069157ewbc:SingleFamilyResidentialMemberus-gaap:RealEstateLoanMember2020-12-310001069157ewbc:CommercialAndIndustrialLoanMemberewbc:LoansReceivableOriginatedMember2021-01-012021-03-310001069157ewbc:CommercialAndIndustrialLoanMemberewbc:LoansReceivableOriginatedMember2020-01-012020-03-310001069157ewbc:LoansReceivablePurchasedMemberewbc:LoansSoldInSecondaryMarketMember2021-01-012021-03-310001069157ewbc:LoansReceivablePurchasedMemberewbc:LoansSoldInSecondaryMarketMember2020-01-012020-03-310001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMember2021-03-310001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetMember2020-12-310001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetAndOtherAssetsMember2021-03-310001069157ewbc:InvestmentsInTaxCreditAndOtherInvestmentsNetAndOtherAssetsMember2020-12-310001069157ewbc:InvestmentInTaxCreditAndOtherInvestmentsMember2021-01-012021-03-31ewbc:credit0001069157ewbc:InvestmentInTaxCreditAndOtherInvestmentsMember2020-01-012020-03-310001069157us-gaap:AvailableforsaleSecuritiesMemberus-gaap:CollateralizedLoanObligationsMember2021-03-310001069157us-gaap:AvailableforsaleSecuritiesMemberus-gaap:CollateralizedLoanObligationsMember2020-12-310001069157us-gaap:CoreDepositsMember2021-03-310001069157us-gaap:CoreDepositsMember2020-12-310001069157us-gaap:CoreDepositsMember2021-01-012021-03-310001069157us-gaap:CoreDepositsMember2020-01-012020-03-310001069157us-gaap:LoanOriginationCommitmentsMember2021-03-310001069157us-gaap:LoanOriginationCommitmentsMember2020-12-310001069157us-gaap:LetterOfCreditMember2021-03-310001069157us-gaap:LetterOfCreditMember2020-12-310001069157us-gaap:CommitmentsToExtendCreditMember2021-03-310001069157us-gaap:CommitmentsToExtendCreditMember2020-12-310001069157us-gaap:StandbyLettersOfCreditMember2021-03-310001069157ewbc:CommercialLettersOfCreditMember2021-03-310001069157us-gaap:StandbyLettersOfCreditMember2020-12-310001069157ewbc:CommercialLettersOfCreditMember2020-12-310001069157ewbc:SingleFamilyResidentialMemberewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMember2021-03-310001069157ewbc:SingleFamilyResidentialMemberewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMember2020-12-310001069157ewbc:MultifamilyResidentialMemberewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMember2021-03-310001069157ewbc:MultifamilyResidentialMemberewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMember2020-12-310001069157ewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMember2021-03-310001069157ewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMember2020-12-310001069157ewbc:SingleFamilyResidentialAndMultiFamilyResidentialMemberewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMember2021-03-310001069157ewbc:SingleFamilyResidentialAndMultiFamilyResidentialMemberewbc:LoansSoldorSecuritizedWithRecourseMemberus-gaap:GuaranteeObligationsMember2020-12-310001069157ewbc:AccruedExpensesAndOtherLiabilitiesMember2021-03-310001069157ewbc:AccruedExpensesAndOtherLiabilitiesMember2020-12-310001069157us-gaap:RestrictedStockUnitsRSUMemberewbc:CliffVestingMember2021-01-012021-03-310001069157srt:MinimumMemberewbc:PerformanceBasedRestrictedStockSettledinStockMember2021-01-012021-03-310001069157srt:MaximumMemberewbc:PerformanceBasedRestrictedStockSettledinStockMember2021-01-012021-03-310001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMemberewbc:CliffVestingMember2021-01-012021-03-310001069157ewbc:TimeBasedRestrictedStockSettledinStockMember2020-12-310001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMember2020-12-310001069157ewbc:TimeBasedRestrictedStockSettledinStockMember2021-01-012021-03-310001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMember2021-01-012021-03-310001069157ewbc:TimeBasedRestrictedStockSettledinStockMember2021-03-310001069157ewbc:PerformanceBasedRestrictedStockSettledinStockMember2021-03-310001069157ewbc:TimeBasedRestrictedStockSettledinCashMember2020-12-310001069157ewbc:TimeBasedRestrictedStockSettledinCashMember2021-01-012021-03-310001069157ewbc:TimeBasedRestrictedStockSettledinCashMember2021-03-310001069157us-gaap:RestrictedStockUnitsRSUMember2021-01-012021-03-310001069157us-gaap:RestrictedStockUnitsRSUMember2020-01-012020-03-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2019-12-310001069157us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2019-12-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2019-12-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-01-012020-03-310001069157us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2020-01-012020-03-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2020-01-012020-03-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-03-310001069157us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2020-03-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2020-03-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-12-310001069157us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2020-12-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2020-12-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-01-012021-03-310001069157us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2021-01-012021-03-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2021-01-012021-03-310001069157us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-03-310001069157us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2021-03-310001069157us-gaap:AccumulatedTranslationAdjustmentMember2021-03-31ewbc:segment0001069157ewbc:ConsumerandBusinessBankingMember2021-01-012021-03-310001069157ewbc:CommercialBankingMember2021-01-012021-03-310001069157us-gaap:AllOtherSegmentsMember2021-01-012021-03-310001069157ewbc:ConsumerandBusinessBankingMember2021-03-310001069157ewbc:CommercialBankingMember2021-03-310001069157us-gaap:AllOtherSegmentsMember2021-03-310001069157ewbc:ConsumerandBusinessBankingMember2020-01-012020-03-310001069157ewbc:CommercialBankingMember2020-01-012020-03-310001069157us-gaap:AllOtherSegmentsMember2020-01-012020-03-310001069157ewbc:ConsumerandBusinessBankingMember2020-03-310001069157ewbc:CommercialBankingMember2020-03-310001069157us-gaap:AllOtherSegmentsMember2020-03-310001069157us-gaap:SubsequentEventMember2021-05-17

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 March 31, 2021

OR

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

For the transition period from to

Commission file number 000-24939

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

Delaware
(State or other jurisdiction of incorporation or organization)

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

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

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

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

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

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

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

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

    Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).
Yes  No 
    Number of shares outstanding of the issuer’s common stock on the latest practicable date: 141,863,399 shares as of April 30, 2021.



TABLE OF CONTENTS
Page
3
3
3
4
5
6
7
9
9
2


PART I — FINANCIAL INFORMATION
ITEM 1. CONSOLIDATED FINANCIAL STATEMENTS

EAST WEST BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEET
($ in thousands, except shares)
(Unaudited)
March 31,
2021
December 31,
2020
(Unaudited)
ASSETS
Cash and due from banks $ 582,270  $ 592,117 
Interest-bearing cash with banks 4,036,863  3,425,854 
Cash and cash equivalents 4,619,133  4,017,971 
Interest-bearing deposits with banks 741,923  809,728 
Assets purchased under resale agreements (“resale agreements”) 2,160,038  1,460,000 
Securities:
Available-for-sale (“AFS”) debt securities, at fair value (amortized cost of $7,904,546 in 2021 and $5,470,523 in 2020; includes assets pledged as collateral of $590,858 in 2021 and $588,484 in 2020)
7,789,213  5,544,658 
Restricted equity securities, at cost 83,250  83,046 
Loans held-for-sale —  1,788 
Loans held-for-investment (net of allowance for loan losses of $607,506 in 2021 and $619,983 in 2020; includes assets pledged as collateral of $23,591,704 in 2021 and $23,263,517 in 2020)
38,981,242  37,770,972 
Investments in qualified affordable housing partnerships, net 284,862  213,555 
Investments in tax credit and other investments, net 361,438  266,525 
Premises and equipment (net of accumulated depreciation of $130,926 in 2021 and $127,884 in 2020)
102,120  103,251 
Goodwill 465,697  465,697 
Operating lease right-of-use assets 94,483  95,460 
Other assets 1,190,747  1,324,262 
TOTAL $ 56,874,146  $ 52,156,913 
LIABILITIES
Deposits:
Noninterest-bearing $ 18,919,298  $ 16,298,301 
Interest-bearing 30,627,838  28,564,451 
Total deposits 49,547,136  44,862,752 
Short-term borrowings —  21,009 
Federal Home Loan Bank (“FHLB”) advances 653,035  652,612 
Assets sold under repurchase agreements (“repurchase agreements”) 300,000  300,000 
Long-term debt and finance lease liabilities 152,195  151,739 
Operating lease liabilities 101,828  102,830 
Accrued expenses and other liabilities 834,925  796,796 
Total liabilities 51,589,119  46,887,738 
COMMITMENTS AND CONTINGENCIES (Note 10)
STOCKHOLDERS’ EQUITY
Common stock, $0.001 par value, 200,000,000 shares authorized; 167,716,333 and 167,240,600 shares issued in 2021 and 2020, respectively
168  167 
Additional paid-in capital 1,865,933  1,858,352 
Retained earnings 4,158,032  4,000,414 
Treasury stock, at cost 25,873,297 shares in 2021 and 25,675,371 shares in 2020
(649,066) (634,083)
Accumulated other comprehensive (loss) income (“AOCI”), net of tax (90,040) 44,325 
Total stockholders’ equity 5,285,027  5,269,175 
TOTAL $ 56,874,146  $ 52,156,913 
See accompanying Notes to Consolidated Financial Statements.

3


EAST WEST BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF INCOME
($ and shares in thousands, except per share data)
(Unaudited)
Three Months Ended March 31,
2021 2020
INTEREST AND DIVIDEND INCOME
Loans receivable, including fees $ 342,008  $ 411,869 
AFS debt securities 29,100  20,142 
Resale agreements 6,099  5,625 
Restricted equity securities 547  446 
Interest-bearing cash and deposits with banks 3,632  11,108 
Total interest and dividend income 381,386  449,190 
INTEREST EXPENSE
Deposits 21,822  76,403 
Short-term borrowings
42  556 
FHLB advances 3,069  4,166 
Repurchase agreements 1,978  3,991 
Long-term debt and finance lease liabilities 780  1,367 
Total interest expense 27,691  86,483 
Net interest income before provision for credit losses 353,695  362,707 
Provision for credit losses —  73,870 
Net interest income after provision for credit losses 353,695  288,837 
NONINTEREST INCOME
Lending fees 18,357  15,773 
Deposit account fees 15,383  10,447 
Interest rate contracts and other derivative income 16,997  7,073 
Foreign exchange income 9,526  7,819 
Wealth management fees 6,911  5,353 
Net gains on sales of loans 1,781  950 
Gains on sales of AFS debt securities 192  1,529 
Other investment income 925  3,378 
Other income 2,794  3,184 
Total noninterest income 72,866  55,506 
NONINTEREST EXPENSE
Compensation and employee benefits 107,808  101,960 
Occupancy and equipment expense 15,922  17,076 
Deposit insurance premiums and regulatory assessments 3,876  3,427 
Deposit account expense 3,892  3,563 
Data processing 4,478  3,826 
Computer software expense 7,159  6,166 
Consulting expense 1,475  1,217 
Legal expense 1,502  3,197 
Other operating expense 19,607  21,119 
Amortization of tax credit and other investments 25,358  18,782 
Total noninterest expense 191,077  180,333 
INCOME BEFORE INCOME TAXES 235,484  164,010 
INCOME TAX EXPENSE 30,490  19,186 
NET INCOME $ 204,994  $ 144,824 
EARNINGS PER SHARE (“EPS”)
BASIC $ 1.45  $ 1.00 
DILUTED $ 1.44  $ 1.00 
WEIGHTED-AVERAGE NUMBER OF SHARES OUTSTANDING
BASIC 141,646  144,814 
DILUTED 142,844  145,285 
See accompanying Notes to Consolidated Financial Statements.

4


EAST WEST BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
($ in thousands)
(Unaudited)
Three Months Ended March 31,
2021 2020
Net income $ 204,994  $ 144,824 
Other comprehensive (loss) income, net of tax:
Net changes in unrealized (losses) gains on AFS debt securities (133,448) 27,453 
Net changes in unrealized gains on cash flow hedges 432  — 
Foreign currency translation adjustments (1,349) (2,164)
Other comprehensive (loss) income (134,365) 25,289 
COMPREHENSIVE INCOME $ 70,629  $ 170,113 
See accompanying Notes to Consolidated Financial Statements.

5


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

Common Stock and
Additional Paid-in Capital
Retained Earnings Treasury Stock AOCI,
Net of Tax
Total
Stockholders’ Equity
Shares Amount
BALANCE, JANUARY 1, 2020 145,625,385  $ 1,826,512  $ 3,689,377  $ (479,864) $ (18,408) $ 5,017,617 
Cumulative-effect of change in accounting principle related to credit losses (1)
—  —  (97,967) —  —  (97,967)
Net income —  —  144,824  —  —  144,824 
Other comprehensive income —  —  —  —  25,289  25,289 
Net activity of common stock pursuant to various stock compensation plans and agreements
281,396  7,272  —  (7,609) —  (337)
Repurchase of common stock pursuant to the Stock Repurchase Program (4,471,682) —  —  (145,966) —  (145,966)
Cash dividends on common stock ($0.275 per share)
—  —  (40,475) —  —  (40,475)
BALANCE, MARCH 31, 2020 141,435,099  $ 1,833,784  $ 3,695,759  $ (633,439) $ 6,881  $ 4,902,985 
BALANCE, JANUARY 1, 2021 141,565,229  $ 1,858,519  $ 4,000,414  $ (634,083) $ 44,325  $ 5,269,175 
Net income —  —  204,994  —  —  204,994 
Other comprehensive income —  —  —  —  (134,365) (134,365)
Net activity of common stock pursuant to various stock compensation plans and agreements
277,807  7,582  —  (14,983) —  (7,401)
Cash dividends on common stock ($0.330 per share)
—  —  (47,376) —  —  (47,376)
BALANCE, MARCH 31, 2021 141,843,036  $ 1,866,101  $ 4,158,032  $ (649,066) $ (90,040) $ 5,285,027 
(1)Represents the impact of the adoption of Accounting Standards Update (“ASU”) 2016-13, Financial Instruments Credit Losses (Topic 326) on January 1, 2020.
See accompanying Notes to Consolidated Financial Statements.

6


EAST WEST BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF CASH FLOWS
($ in thousands)
(Unaudited)
Three Months Ended March 31,
2021 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income $ 204,994  $ 144,824 
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 37,490  31,186 
Amortization of premiums and accretion of discount , net 5,770  (4,519)
Stock compensation costs 7,817  7,209 
Deferred income tax benefit 224  28 
Provision for credit losses —  73,870 
Net gains on sales of loans (1,781) (950)
Gains on sales of AFS debt securities (192) (1,529)
Loans held-for-sale:
Originations and purchases (5,718) (5,802)
Proceeds from sales and paydowns/payoffs of loans originally classified as held-for-sale 7,644  4,657 
Proceeds from distributions received from equity method investees 2,505  973 
Net change in accrued interest receivable and other assets 185,677  (462,766)
Net change in accrued expenses and other liabilities (72,935) 304,680 
Other net operating activities 20  (158)
Total adjustments 166,521  (53,121)
Net cash provided by operating activities 371,515  91,703 
CASH FLOWS FROM INVESTING ACTIVITIES    
Net (increase) decrease in:    
Investments in qualified affordable housing partnerships, tax credit and other investments (52,756) (27,581)
Interest-bearing deposits with banks 29,000  (115,419)
Resale agreements:
Proceeds from paydowns and maturities 223,952  250,000 
Purchases (923,990) — 
AFS debt securities:
Proceeds from sales 46,397  306,463 
Proceeds from repayments, maturities and redemptions 473,808  308,620 
Purchases (2,969,640) (987,130)
Loans held-for-investment:
Proceeds from sales of loans originally classified as held-for-investment 147,115  110,945 
Purchases (311,030) (133,185)
Other changes in loans held-for-investment, net (1,046,727) (1,116,358)
Purchases of premises and equipment (1,563) (916)
Proceeds from distributions received from equity method investees 2,832  374 
Other net investing activities (1,307) (1,143)
Net cash used in investing activities (4,383,909) (1,405,330)
See accompanying Notes to Consolidated Financial Statements.

7


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

Three Months Ended March 31,
2021 2020
CASH FLOWS FROM FINANCING ACTIVITIES    
Net increase in deposits 4,559,929  1,374,287 
Net (decrease) increase in short-term borrowings (21,143) 39,962 
Repayment of FHLB advances —  (99,999)
Repayment of long-term debt and lease liabilities (315) (289)
Common stock:
Repurchase of common stocks pursuant to the Stock Repurchase Program —  (145,966)
Stocks tendered for payment of withholding taxes (14,983) (7,609)
Cash dividends paid (48,213) (41,358)
Net cash provided by financing activities 4,475,275  1,119,028 
Effect of exchange rate changes on cash and cash equivalents 138,281  13,492 
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 601,162  (181,107)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 4,017,971  3,261,149 
CASH AND CASH EQUIVALENTS, END OF PERIOD $ 4,619,133  $ 3,080,042 
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid during the period for:
Interest $ 29,680  $ 88,520 
Income taxes, net $ —  $ 2,904 
Noncash investing and financing activities:
Loans transferred from held-for-investment to held-for-sale $ 145,872  $ 110,223 
Loans transferred to other real estate owned (“OREO”) and other nonperforming assets $ 10,360  $ 23,394 


See accompanying Notes to Consolidated Financial Statements.

8


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

Note 1 Basis of Presentation

East West Bancorp, Inc. (referred to herein on an unconsolidated basis as “East West” and on a consolidated basis as the “Company”) is a registered bank holding company that offers a full range of banking services to individuals and businesses through its subsidiary bank, East West Bank and its subsidiaries (“East West Bank” or the “Bank”). The unaudited interim Consolidated Financial Statements in this Quarterly Report on Form 10-Q (“this Form 10-Q”) include the accounts of East West, East West Bank and East West’s subsidiaries. Intercompany transactions and accounts have been eliminated in consolidation. As of March 31, 2021, East West also has six wholly owned subsidiaries that are statutory business trusts (the “Trusts”). In accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 810, Consolidation, the Trusts are not included on the Consolidated Financial Statements.

The unaudited interim Consolidated Financial Statements are presented in accordance with United States (“U.S.”) generally accepted accounting principles (“GAAP”), applicable guidelines prescribed by regulatory authorities and general practices in the banking industry. They reflect all adjustments that, in the opinion of management, are necessary for fair presentation of the interim Consolidated Financial Statements. Certain items on the Consolidated Financial Statements and notes for the prior periods have been reclassified to conform to the current period presentation.

The current period’s results of operations are not necessarily indicative of results that may be expected for any future interim period or for the year as a whole. Events subsequent to the Consolidated Balance Sheet date have been evaluated through the date the Consolidated Financial Statements are issued for inclusion in the accompanying Consolidated Financial Statements. The unaudited interim Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and notes thereto included in the Company’s annual report on Form 10-K for the year ended December 31, 2020, filed with the U.S. Securities and Exchange Commission on February 26, 2021 (the “Company’s 2020 Form 10-K”).

9


Note 2 — Current Accounting Developments

New Accounting Pronouncements Adopted
Standard Required Date of Adoption Description Effect on Financial Statements
Standards Adopted in 2021
ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting and subsequent related ASU 2021-01, Reference Rate Reform (Topic 848): Scope

Effective for all entities from the dates of issuance through December 31, 2022.
In March 2020, the FASB issued an ASU related to contracts or hedging relationships that reference London Interbank Offered Rate (“LIBOR”) or other reference rates that are expected to be discontinued due to reference rate reform. This ASU provides temporary optional expedients and exceptions regarding the accounting requirements related to the modification of certain contracts, hedging relationships and other transactions that are affected by the reference rate reform. The guidance permits the Company to make a one-time election to sell and/or transfer qualifying held-to-maturity securities, and not to apply modification accounting or remeasure lease payments in lease contracts if the changes to the contract are related to the discontinuation of the reference rate. If certain criteria are met, the amendments also allow exceptions to the de-designation criteria of the hedging relationships and the assessment of hedge effectiveness during the transition period. This one time election may be made at any time after March 12, 2020, but no later than December 31, 2022. In January 2021, the FASB issued ASU 2021-01 as subsequent amendments, which expanded the scope of Topic 848 to include all affected derivatives and clarified certain optional expedients and exceptions regarding the hedge accounting for derivative contracts affected by the discounting transition.

The amendments of this guidance could be elected retrospectively or prospectively to new modifications made on or after the date of issuance of this ASU, January 7, 2021.
The Company adopted this guidance on a prospective basis in January 2021. At the time of adoption, the guidance did not have a material impact on the Company’s Consolidated Financial Statements. The Company will continue to track the exposure as of each reporting period and to assess the impact as the reference rate transition occurs through the cessation of LIBOR.
ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes
January 1, 2021

Early adoption is permitted on January 1, 2020.
This ASU simplifies the accounting for income taxes by removing certain exceptions to the existing guidance. This includes removing exceptions to: 1) the incremental approach for intraperiod tax allocation, 2) the requirement to recognize a deferred tax liability for equity method investments when a foreign subsidiary becomes an equity method investment, 3) the ability not to recognize a deferred tax liability when a foreign equity method investment becomes a subsidiary, and 4) the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year.

In addition, this ASU simplifies the accounting for income taxes related to franchise taxes, the tax basis of goodwill and the method for recognizing an enacted change in tax laws. This ASU also specifies that an entity is not required to allocate the consolidated amount of tax expense to a legal entity that is not subject to tax in its separate financial statements. This ASU also makes improvements in the accounting for income taxes related to employee stock ownership plans and equity method investments in qualified affordable housing projects.

This guidance should be applied on either a retrospective, modified retrospective or prospective basis depending on the amendments.
The Company adopted this guidance in January 2021 using the transition guidance prescribed by this ASU. At the time of adoption, this guidance did not have a material impact on the Company’s Consolidated Financial Statements.
10


Note 3 — Fair Value Measurement and Fair Value of Financial Instruments

Fair Value Determination

Fair value is defined as the price that would be received to sell an asset or the price that would be paid to transfer a liability in an orderly transaction between market participants at the measurement date. In determining the fair value of financial instruments, the Company uses various methods including market and income approaches. Based on these approaches, the Company utilizes certain assumptions that market participants would use in pricing an asset or a liability. These inputs can be readily observable, market corroborated or generally unobservable. The Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. The fair value hierarchy noted below is based on the quality and reliability of the information used to determine fair value. The fair value hierarchy gives the highest priority to quoted prices available in active markets and the lowest priority to prices derived from data lacking transparency. The fair value of the Company’s assets and liabilities is classified and disclosed in one of the following three categories:

Level 1 — Valuation is based on quoted prices for identical instruments traded in active markets.
Level 2 — Valuation is based on quoted prices for similar instruments traded in active markets; quoted prices for identical or similar instruments traded in markets that are not active; and model-derived valuations whose inputs are observable and can be corroborated by market data.
Level 3 — Valuation is based on significant unobservable inputs for determining the fair value of assets or liabilities. These significant unobservable inputs reflect assumptions that market participants may use in pricing the assets or liabilities.

The classification of assets and liabilities within the hierarchy is based on whether inputs to the valuation methodology used are observable or unobservable, and the significance of those inputs in the fair value measurement. The Company’s assets and liabilities are classified in their entirety based on the lowest level of input that is significant to their fair value measurements.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following section describes the valuation methodologies used by the Company to measure financial assets and liabilities on a recurring basis, as well as the general classification of these instruments pursuant to the fair value hierarchy.

Available-for-Sale Debt Securities — When available, the Company uses quoted market prices to determine the fair value of AFS debt securities, which are classified as Level 1. Level 1 AFS debt securities are comprised of U.S. Treasury securities. The fair value of other AFS debt securities is generally determined by independent external pricing service providers who have experience in valuing these securities or by taking the average quoted market prices obtained from independent external brokers. The valuations provided by the third-party pricing service providers are based on observable market inputs, which include benchmark yields, reported trades, issuer spreads, benchmark securities, bids, offers, prepayment expectation and reference data obtained from market research publications. Inputs used by the third-party pricing service providers in valuing collateralized mortgage obligations and other securitization structures also include new issue data, monthly payment information, whole loan collateral performance, tranche evaluation and “To Be Announced” prices. In valuing securities issued by state and political subdivisions, inputs used by third-party pricing service providers also include material event notices.

On a monthly basis, the Company validates the valuations provided by third-party pricing service providers to ensure that the fair value determination is consistent with the applicable accounting guidance and the financial instruments are properly classified in the fair value hierarchy. To perform this validation, the Company evaluates the fair values of securities by comparing the fair values provided by the third-party pricing service providers to prices from other available independent sources for the same securities. When significant variances in prices are identified, the Company further compares inputs used by different sources to ascertain the reliability of these sources. On a quarterly basis, the Company reviews the documentation received from the third-party pricing service providers regarding the valuation inputs and methodology used for each category of securities.

When pricing is unavailable from third-party pricing service providers for certain securities, the Company requests market quotes from various independent external brokers and utilizes the average quoted market prices. These valuations are based on observable inputs in the current marketplace and are classified as Level 2. The Company periodically communicates with the independent external brokers to validate their pricing methodology. Information such as pricing sources, pricing assumptions, data inputs and valuation technique are reviewed.

11


Equity Securities — Equity securities consisted of mutual funds as of both March 31, 2021 and December 31, 2020. The Company invested in these mutual funds for Community Reinvestment Act (“CRA”) purposes. The Company uses net asset value (“NAV”) information to determine the fair value of these equity securities. When NAV is available periodically and the equity securities can be put back to the transfer agents at the publicly available NAV, the fair value of the equity securities is classified as Level 1. When NAV is available periodically but the equity securities may not be readily marketable at its periodic NAV in the secondary market, the fair value of these equity securities is classified as Level 2.

Interest Rate Contracts The Company enters into interest rate swap and option contracts that are not designated as hedging instruments with its borrowers to lock in attractive intermediate and long-term interest rates, resulting in the customer obtaining a synthetic fixed-rate loan. To economically hedge against the interest rate risks in the products offered to its customers, the Company enters into mirrored offsetting interest rate contracts with third-party financial institutions. The Company also enters into interest rate swap contracts with institutional counterparties to hedge against certain variable interest rate borrowings. These interest rate swap contracts with institutional counterparties were designated as cash flow hedges. The fair value of the interest rate swaps is determined using the market standard methodology of netting the discounted future fixed cash payments (or receipts) and the discounted expected variable cash receipts (or payments). The fair value of the interest rate options, which consist of floors and caps, is determined using the market standard methodology of discounting the future expected cash receipts that would occur if variable interest rates fall below (rise above) the strike rate of the floors (caps). In addition, to comply with the provisions of ASC 820, Fair Value Measurement, the Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements of its derivatives. The credit valuation adjustments associated with the Company’s derivatives utilize model-derived credit spreads, which are Level 3 inputs. As of March 31, 2021 and December 31, 2020, the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of these interest rate contracts and has determined that the credit valuation adjustments were not significant to the overall valuation of its derivative portfolios. The Company classifies these derivative instruments as Level 2 due to the observable nature of the significant inputs utilized.

Foreign Exchange Contracts The Company enters into foreign exchange contracts to accommodate the business needs of its customers. For a majority of the foreign exchange contracts entered with its customers, the Company entered into offsetting foreign exchange contracts with third-party financial institutions to manage its exposure. The Company also utilizes foreign exchange contracts that are not designated as hedging instruments to mitigate the economic effect of fluctuations in certain foreign currency on-balance sheet assets and liabilities, primarily foreign currency denominated deposits that it offers to its customers. The fair value is determined at each reporting period based on changes in the foreign exchange rates. These are over-the-counter contracts where quoted market prices are not readily available. Valuation is measured using conventional valuation methodologies with observable market data. Due to the short-term nature of the majority of these contracts, the counterparties’ credit risks are considered nominal and result in no adjustments to the valuation of the foreign exchange contracts. Due to the observable nature of the inputs used in deriving the fair value of these contracts, the valuation of foreign exchange contracts are classified as Level 2. As of March 31, 2021 and December 31, 2020, the Bank held foreign currency non-deliverable forward contracts to hedge its net investment in its China subsidiary, East West Bank (China) Limited, a non-U.S. dollar (“USD”) functional currency subsidiary in China. These foreign currency non-deliverable forward contracts were designated as net investment hedges. The fair value of foreign currency contracts is determined by comparing the contracted foreign exchange rate to the current market foreign exchange rate. Key inputs of the current market exchange rate include spot rates and forward rates of the contractual currencies. Foreign exchange forward curves are used to determine which forward rate pertains to a specific maturity. Due to the observable nature of the inputs used in deriving the estimated fair value, these instruments are classified as Level 2.

Credit Contracts — The Company may periodically enter into credit risk participation agreements (“RPAs”) to manage the credit exposure on interest rate contracts associated with the syndicated loans. The Company may enter into protection sold or protection purchased RPAs with institutional counterparties. The fair value of RPAs is calculated by determining the total expected asset or liability exposure of the derivatives to the borrowers and applying the borrowers’ credit spread to that exposure. Total expected exposure incorporates both the current and potential future exposure of the derivatives, derived from using observable inputs, such as yield curves and volatilities. The majority of the inputs used to value the RPAs are observable; accordingly, RPAs fall within Level 2.

12


Equity Contracts — As part of the loan origination process, the Company periodically obtains warrants to purchase preferred and/or common stock of technology and life sciences companies to which it provides loans. As of March 31, 2021, the warrants included on the Consolidated Financial Statements were only from private companies. As of December 31, 2020, the warrants included on the Consolidated Financial Statements were from both public and private companies. The Company values these warrants based on the Black-Scholes option pricing model. For warrants from public companies, the model uses the underlying stock price, stated strike price, warrant expiration date, risk-free interest rate based on a duration-matched U.S. Treasury rate, and market-observable company-specific option volatility as inputs to value the warrants. Due to the observable nature of the inputs used in deriving the estimated fair value, warrants from public companies are classified as Level 2. For warrants from private companies, the model uses inputs such as the offering price observed in the most recent round of funding, stated strike price, warrant expiration date, risk-free interest rate based on duration-matched U.S. Treasury rate and option volatility. The Company applies proxy volatilities based on the industry sectors of the private companies. The model values are then adjusted for a general lack of liquidity due to the private nature of the underlying companies. Since both option volatility and liquidity discount assumptions are subject to management’s judgment, measurement uncertainty is inherent in the valuation of private companies’ warrants. Due to the unobservable nature of the option volatility and liquidity discount assumptions used in deriving the estimated fair value, warrants from private companies are classified as Level 3. Given that the Company holds long positions in all warrants, an increase in volatility assumption would generally result in an increase in fair value. A higher liquidity discount would generally result in a decrease in fair value. On a quarterly basis, the changes in the fair value of warrants from private companies are reviewed for reasonableness, and a measurement uncertainty analysis on the option volatility and liquidity discount assumptions is performed.

Commodity Contracts — The Company enters into energy commodity contracts in the form of swaps and options with its commercial loan customers to allow them to hedge against the risk of fluctuation in energy commodity prices. The fair value of the commodity option contracts is determined using the Black-Scholes model and assumptions that include expectations of future commodity price and volatility. The future commodity contract price is derived from observable inputs such as the market price of the commodity. Commodity swaps are structured as an exchange of fixed cash flows for floating cash flows. The fixed cash flows are predetermined based on the known volumes and fixed price as specified in the swap agreement. The floating cash flows are correlated with the change of forward commodity prices, which is derived from market corroborated futures settlement prices. The fair value of the commodity swaps is determined using the market standard methodology of netting the discounted future fixed cash payments (or receipts) and the discounted expected variable cash receipts (or payments) based on the market prices of the commodity. As a result, the Company classifies these derivative instruments as Level 2 due to the observable nature of the significant inputs utilized.
The following tables present financial assets and liabilities that are measured at fair value on a recurring basis as of March 31, 2021 and December 31, 2020:
13


($ in thousands) Assets and Liabilities Measured at Fair Value on a Recurring Basis
as of March 31, 2021
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Total
Fair Value
AFS debt securities:
U.S. Treasury securities $ 826,342  $ —  $ —  $ 826,342 
U.S. government agency and U.S. government-sponsored enterprise debt securities —  1,194,005  —  1,194,005 
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities:
Commercial mortgage-backed securities —  1,169,391  —  1,169,391 
Residential mortgage-backed securities —  2,247,406  —  2,247,406 
Municipal securities —  420,065  —  420,065 
Non-agency mortgage-backed securities:
Commercial mortgage-backed securities —  281,027  —  281,027 
Residential mortgage-backed securities —  523,500  —  523,500 
Corporate debt securities —  496,643  —  496,643 
Foreign government bonds —  276,328  —  276,328 
Asset-backed securities —  63,040  —  63,040 
Collateralized loan obligations (“CLOs”) —  291,466  —  291,466 
Total AFS debt securities
$ 826,342  $ 6,962,871  $   $ 7,789,213 
Investments in tax credit and other investments:
Equity securities (1)
$ 22,233  $ 4,460  $ —  $ 26,693 
Total investments in tax credit and other investments
$ 22,233  $ 4,460  $   $ 26,693 
Derivative assets:
Interest rate contracts $ —  $ 319,049  $ —  $ 319,049 
Foreign exchange contracts —  39,562  —  39,562 
Credit contracts —  — 
Equity contracts —  —  272  272 
Commodity contracts —  98,429  —  98,429 
Gross derivative assets $   $ 457,045  $ 272  $ 457,317 
Netting adjustments (2)
$ —  $ (108,235) $ —  $ (108,235)
Net derivative assets $   $ 348,810  $ 272  $ 349,082 
Derivative liabilities:
Interest rate contracts $ —  $ 230,290  $ —  $ 230,290 
Foreign exchange contracts —  27,287  —  27,287 
Credit contracts —  153  —  153 
Commodity contracts —  86,405  —  86,405 
Gross derivative liabilities $   $ 344,135  $   $ 344,135 
Netting adjustments (2)
$ —  $ (186,687) $ —  $ (186,687)
Net derivative liabilities $   $ 157,448  $   $ 157,448 
(1)Equity securities consist of mutual funds with readily determinable fair values. The Company invested in these mutual funds for CRA purposes.
(2)Represents balance sheet netting of derivative assets and liabilities and related cash collateral under master netting agreements or similar agreements. See Note 6 — Derivatives to the Consolidated Financial Statements in this Form 10-Q for additional information.
14


($ in thousands) Assets and Liabilities Measured at Fair Value on a Recurring Basis
as of December 31, 2020
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Total
Fair Value
AFS debt securities:
U.S. Treasury securities $ 50,761  $ —  $ —  $ 50,761 
U.S. government agency and U.S. government-sponsored enterprise debt securities —  814,319  —  814,319 
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities:
Commercial mortgage-backed securities —  1,153,770  —  1,153,770 
Residential mortgage-backed securities —  1,660,894  —  1,660,894 
Municipal securities —  396,073  —  396,073 
Non-agency mortgage-backed securities:
Commercial mortgage-backed securities —  239,842  —  239,842 
Residential mortgage-backed securities —  289,775  —  289,775 
Corporate debt securities —  405,968  —  405,968 
Foreign government bonds —  182,531  —  182,531 
Asset-backed securities —  63,231  —  63,231 
CLOs —  287,494  —  287,494 
Total AFS debt securities
$ 50,761  $ 5,493,897  $   $ 5,544,658 
Investments in tax credit and other investments:
Equity securities (1)
$ 22,548  $ 8,724  $ —  $ 31,272 
Total investments in tax credit and other investments
$ 22,548  $ 8,724  $   $ 31,272 
Derivative assets:
Interest rate contracts $ —  $ 489,132  $ —  $ 489,132 
Foreign exchange contracts —  30,300  —  30,300 
Credit contracts —  13  —  13 
Equity contracts —  585  273  858 
Commodity contracts —  82,451  —  82,451 
Gross derivative assets $   $ 602,481  $ 273  $ 602,754 
Netting adjustments (2)
$ —  $ (101,512) $ —  $ (101,512)
Net derivative assets $   $ 500,969  $ 273  $ 501,242 
Derivative liabilities:
Interest rate contracts $ —  $ 317,698  $ —  $ 317,698 
Foreign exchange contracts —  22,759  —  22,759 
Credit contracts —  206  —  206 
Commodity contracts —  84,165  —  84,165 
Gross derivative liabilities $   $ 424,828  $   $ 424,828 
Netting adjustments (2)
$ —  $ (184,697) $ —  $ (184,697)
Net derivative liabilities $   $ 240,131  $   $ 240,131 
(1)Equity securities consist of mutual funds with readily determinable fair values. The Company invested in these mutual funds for CRA purposes.
(2)Represents balance sheet netting of derivative assets and liabilities and related cash collateral under master netting agreements or similar agreements. See Note 6 — Derivatives to the Consolidated Financial Statements in this Form 10-Q for additional information.

15


For the three months ended March 31, 2021 and 2020, Level 3 fair value measurements that were measured on a recurring basis consisted of warrants issued by private companies. The following table provides a reconciliation of the beginning and ending balances of these equity warrants for the three months ended March 31, 2021 and 2020:
($ in thousands) Three Months Ended March 31,
2021 2020
Equity Contracts
Beginning balance $ 273  $ 421 
Total (losses) gains included in earnings (1)
(1) 292 
Ending balance $ 272  $ 713 
(1)Includes unrealized (losses) gains of $(1) thousand and $292 thousand for the three months ended March 31, 2021 and 2020, respectively. The realized/unrealized gains (losses) of equity warrants are included in Lending fees on the Consolidated Statement of Income.

The following table presents quantitative information about the significant unobservable inputs used in the valuation of Level 3 fair value measurements as of March 31, 2021 and December 31, 2020, respectively. The significant unobservable inputs presented in the table below are those that the Company considers significant to the fair value of the Level 3 assets. The Company considers unobservable inputs to be significant if, by their exclusion, the fair value of the Level 3 assets would be impacted by a predetermined percentage change.
($ in thousands) Fair Value
Measurements
(Level 3)
Valuation
Technique
Unobservable
Inputs
Range of Inputs
Weighted-
Average (1)
March 31, 2021
Derivative assets:
Equity contracts $ 272 
Black-Scholes option pricing model
Equity volatility
48% — 56%
52%
Liquidity discount 47% 47%
December 31, 2020
Derivative assets:
Equity contracts $ 273 
Black-Scholes option pricing model
Equity volatility
46% — 61%
53%
Liquidity discount 47% 47%
(1)Weighted-average is calculated based on the fair value of equity warrants as of March 31, 2021 and December 31, 2020.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Assets measured at fair value on a nonrecurring basis include certain individually evaluated loans held-for-investment, investments in qualified affordable housing partnerships, tax credit and other investments, OREO, loans held-for-sale, and other nonperforming assets. Nonrecurring fair value adjustments result from impairment on certain individually evaluated loans held-for-investment and investments in qualified affordable housing partnerships, tax credit and other investments, write-downs of OREO and other nonperforming assets, or from the application of lower of cost or fair value on loans held-for-sale.

Individually Evaluated Loans Held-For-Investment — Individually evaluated loans held-for-investment are classified as Level 3 assets. The following two methods are used to derive the fair value of individually evaluated loans held-for-investment:

Discounted cash flow valuation techniques that consist of developing an expected stream of cash flows over the life of the loans, and then calculating the present value of the loans by discounting the expected cash flows at a designated discount rate.
When an individually evaluated loan is collateral-dependent, the fair value of the loan is determined based on the fair value of the underlying collateral, which may take the form of real estate, inventory, equipment, contracts or guarantees. The fair value of the underlying collateral is generally based on third-party appraisals, or an internal valuation if a third-party appraisal is not required by regulations, or unavailable. An internal valuation utilizes one or more valuation techniques such as the income, market and/or cost approaches.

16


Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net — The Company conducts due diligence on its investments in qualified affordable housing partnerships, tax credit and other investments prior to the initial investment date and through the placed-in-service date. After these investments are either acquired or placed into service, the Company continues its periodic monitoring process, which includes the quarterly review of the financial statements, the annual review of tax returns of the investment entity, the annual review of the financial statements of the guarantor (if any) and a comparison of the actual performance of the investment against the financial projections prepared at the time when the investment was made. The Company assesses its tax credit and other investments for possible other-than-temporary impairment (“OTTI”) on an annual basis or when events or circumstances suggest that the carrying amount of the investments may not be realizable. These circumstances can include, but are not limited to the following factors:

expected future cash flows that are less than the carrying amount of the investment;
changes in the economic, market or technological environment that could adversely affect the investee’s operations; and
other factors that raise doubt about the investee’s ability to continue as a going concern, such as negative cash flows from operations and the continuing prospects of the underlying operations of the investment.

All available evidence is considered in assessing whether a decline in value is other-than-temporary. Generally, none of the aforementioned factors are individually conclusive and the relative importance placed on individual facts may vary depending on the situation. In accordance with ASC 323-10-35-32, an impairment charge would only be recognized in earnings for a decline in value that is determined to be other-than-temporary.

Other Real Estate Owned — The Company’s OREO represents properties acquired through foreclosure, or through full or partial satisfaction of loans held-for-investment. These OREO properties are recorded at estimated fair value less the costs to sell at the time of foreclosure and at the lower of cost or estimated fair value less the costs to sell subsequent to acquisition. On a monthly basis, the current fair market value of each OREO property is reviewed to ensure that the current carrying value is appropriate. OREO properties are classified as Level 3.

Other Nonperforming Assets Other nonperforming assets are recorded at fair value upon transfers from loans to foreclosed assets. Subsequently, foreclosed assets are recorded at the lower of carrying value or fair value. Fair value is based on independent market prices, appraised values of the collateral or management’s estimates of the foreclosed asset. The Company records an impairment when the foreclosed asset’s fair value declines below its carrying value. Other nonperforming assets are classified as Level 3.

17


The following tables present the carrying amounts of assets that were still held and had fair value changes measured on a nonrecurring basis as of March 31, 2021 and December 31, 2020:
($ in thousands) Assets Measured at Fair Value on a Nonrecurring Basis
as of March 31, 2021
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Fair Value
Measurements
Loans held-for-investment:
Commercial:
Commercial and industrial (“C&I”) $ —  $ —  $ 143,630  $ 143,630 
Commercial real estate (“CRE”):
CRE —  —  47,639  47,639 
Multifamily residential —  —  2,332  2,332 
Construction and land —  —  4,191  4,191 
Total commercial     197,792  197,792 
Consumer:
Residential mortgage:
Home equity lines of credit (“HELOCs”) —  —  4,791  4,791 
Total consumer     4,791  4,791 
Total loans held-for-investment $   $   $ 202,583  $ 202,583 
($ in thousands) Assets Measured at Fair Value on a Nonrecurring Basis
as of December 31, 2020
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Fair Value
Measurements
Loans held-for-investment:
Commercial:
C&I $ —  $ —  $ 143,331  $ 143,331 
CRE:
CRE —  —  42,894  42,894 
Total commercial     186,225  186,225 
Consumer:
Residential mortgage:
HELOCs —  —  1,146  1,146 
Other consumer     2,491  2,491 
Total consumer     3,637  3,637 
Total loans held-for-investment $   $   $ 189,862  $ 189,862 
Investments in tax credit and other investments, net
$   $   $ 3,140  $ 3,140 
OREO (1)
$   $   $ 15,824  $ 15,824 
(1)Amounts are included in Other assets on the Consolidated Balance Sheet and represent the carrying value of OREO properties that were written down subsequent to their initial classification as OREO.
18


The following table presents the increase (decrease) in fair value of assets for which a nonrecurring fair value adjustment has been recognized for the three months ended March 31, 2021 and 2020:
($ in thousands) Three Months Ended March 31,
2021 2020
Loans held-for-investment:
Commercial:
C&I $ (5,309) $ (21,501)
CRE:
CRE (7,062) (5)
Multifamily residential (16) — 
Construction and land (71) — 
Total commercial (12,458) (21,506)
Consumer:
Residential mortgage:
HELOCs (37) (193)
Other consumer —  2,491 
Total consumer
(37) 2,298 
Total loans held-for-investment $ (12,495) $ (19,208)
Investments in tax credit and other investments, net
$   $ 150 
Other nonperforming assets $ (3,890) $ (300)

The following table presents the quantitative information about the significant unobservable inputs used in the valuation of Level 3 fair value measurements that are measured on a nonrecurring basis as of March 31, 2021 and December 31, 2020:
($ in thousands) Fair Value
Measurements
(Level 3)
Valuation
Techniques
Unobservable
Inputs
Range of 
Inputs
Weighted-
Average of Inputs (1)
March 31, 2021
Loans held-for-investment $ 108,918  Discounted cash flows Discount
4% — 15%
11%
$ 24,356  Fair value of collateral Discount
10% — 20%
15%
$ 9,902  Fair value of collateral Contract value NM NM
$ 59,407  Fair value of property Selling cost
8% — 26%
9%
December 31, 2020
Loans held-for-investment $ 104,783  Discounted cash flows Discount
3% — 15%
11%
$ 22,207  Fair value of collateral Discount
10% — 26%
15%
$ 15,879  Fair value of collateral Contract value NM NM
$ 46,993  Fair value of property Selling cost
7% — 26%
10%
Investments in tax credit and other investments, net
$ 3,140  Individual analysis of each investment Expected future tax benefits and distributions NM NM
OREO $ 15,824  Fair value of property Selling cost 8% 8%
NM — Not meaningful.
(1)Weighted-average of inputs is based on the relative fair value of the respective assets as of March 31, 2021 and December 31, 2020.

19


Disclosures about Fair Value of Financial Instruments

The following tables present the fair value estimates for financial instruments as of March 31, 2021 and December 31, 2020, excluding financial instruments recorded at fair value on a recurring basis as they are included in the tables presented elsewhere in this Note. The carrying amounts in the following tables are recorded on the Consolidated Balance Sheet under the indicated captions, except for accrued interest receivable and mortgage servicing rights that are included in Other assets, and accrued interest payable that is included in Accrued expenses and other liabilities. These financial assets and liabilities are measured at amortized cost basis on the Company’s Consolidated Balance Sheet.
($ in thousands) March 31, 2021
Carrying
Amount
Level 1 Level 2 Level 3 Estimated
Fair Value
Financial assets:
Cash and cash equivalents $ 4,619,133  $ 4,619,133  $ —  $ —  $ 4,619,133 
Interest-bearing deposits with banks $ 741,923  $ —  $ 741,923  $ —  $ 741,923 
Resale agreements $ 2,160,038  $ —  $ 2,152,392  $ —  $ 2,152,392 
Restricted equity securities, at cost $ 83,250  $ —  $ 83,250  $ —  $ 83,250 
Loans held-for-investment, net $ 38,981,242  $ —  $ —  $ 38,922,550  $ 38,922,550 
Mortgage servicing rights $ 5,506  $ —  $ —  $ 8,740  $ 8,740 
Accrued interest receivable $ 149,953  $ —  $ 149,953  $ —  $ 149,953 
Financial liabilities:
Demand, checking, savings and money market deposits $ 40,748,303  $ —  $ 40,748,303  $ —  $ 40,748,303 
Time deposits $ 8,798,833  $ —  $ 8,811,048  $ —  $ 8,811,048 
FHLB advances $ 653,035  $ —  $ 657,460  $ —  $ 657,460 
Repurchase agreements $ 300,000  $ —  $ 316,099  $ —  $ 316,099 
Long-term debt $ 147,445  $ —  $ 151,015  $ —  $ 151,015 
Accrued interest payable $ 9,966  $ —  $ 9,966  $ —  $ 9,966 
($ in thousands) December 31, 2020
Carrying
Amount
Level 1 Level 2 Level 3 Estimated
Fair Value
Financial assets:
Cash and cash equivalents $ 4,017,971  $ 4,017,971  $ —  $ —  $ 4,017,971 
Interest-bearing deposits with banks $ 809,728  $ —  $ 809,728  $ —  $ 809,728 
Resale agreements $ 1,460,000  $ —  $ 1,464,635  $ —  $ 1,464,635 
Restricted equity securities, at cost $ 83,046  $ —  $ 83,046  $ —  $ 83,046 
Loans held-for-sale $ 1,788  $ —  $ 1,788  $ —  $ 1,788 
Loans held-for-investment, net $ 37,770,972  $ —  $ —  $ 37,803,940  $ 37,803,940 
Mortgage servicing rights $ 5,522  $ —  $ —  $ 8,435  $ 8,435 
Accrued interest receivable $ 150,140  $ —  $ 150,140  $ —  $ 150,140 
Financial liabilities:
Demand, checking, savings and money market deposits $ 35,862,403  $ —  $ 35,862,403  $ —  $ 35,862,403 
Time deposits $ 9,000,349  $ —  $ 9,016,884  $ —  $ 9,016,884 
Short-term borrowings $ 21,009  $ —  $ 21,009  $ —  $ 21,009 
FHLB advances $ 652,612  $ —  $ 659,631  $ —  $ 659,631 
Repurchase agreements $ 300,000  $ —  $ 317,850  $ —  $ 317,850 
Long-term debt $ 147,376  $ —  $ 150,131  $ —  $ 150,131 
Accrued interest payable $ 11,956  $ —  $ 11,956  $ —  $ 11,956 
20


Note 4 — Assets Purchased under Resale Agreements and Sold under Repurchase Agreements

Assets Purchased under Resale Agreements

In resale agreements, the Company is exposed to credit risk for both counterparties and the underlying collateral. The Company manages credit exposure from certain transactions by entering into master netting agreements and collateral arrangements with counterparties. The relevant agreements allow for the efficient closeout of the transaction, liquidation and set-off of collateral against the net amount owed by the counterparty following a default. It is also the Company’s policy to take possession, where possible, of the assets underlying resale agreements. As a result of the Company’s credit risk mitigation practices with respect to resale agreements as described above, the Company did not hold any reserves for credit impairment with respect to these agreements as of March 31, 2021 and December 31, 2020.

Securities Purchased under Resale Agreements — Total securities purchased under resale agreements were $1.31 billion and $1.16 billion as of March 31, 2021 and December 31, 2020, respectively. The weighted-average yields were 1.57% and 2.50% for the three months ended March 31, 2021 and 2020, respectively.

Loans Purchased under Resale Agreements — The Company participated in resale agreements collateralized with loans with multiple counterparties starting in the fourth quarter of 2020. Total loans purchased under resale agreements were $850.0 million and $300.0 million as of March 31, 2021 and December 31, 2020, respectively. The weighted-average yield was 2.02% for the three months ended March 31, 2021.

Assets Sold under Repurchase Agreements — As of March 31, 2021, the collateral for the repurchase agreements were comprised of U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities and U.S. Treasury securities. Gross repurchase agreements were $300.0 million as of both March 31, 2021 and December 31, 2020. The weighted-average interest rates were 2.67% and 4.10% for the three months ended March 31, 2021 and 2020, respectively. As of March 31, 2021, all repurchase agreements will mature in 2023.

Balance Sheet Offsetting

The Company’s resale and repurchase agreements are transacted under legally enforceable master repurchase agreements that, in the event of default by the counterparty, provide the Company the right to liquidate securities held and to offset receivables and payables with the same counterparty. The Company nets resale and repurchase transactions with the same counterparty on the Consolidated Balance Sheet when it has a legally enforceable master netting agreement and the transactions are eligible for netting under ASC 210-20-45-11, Balance Sheet Offsetting: Repurchase and Reverse Repurchase Agreements. Collateral received includes securities that are not recognized on the Consolidated Balance Sheet. Collateral pledged consists of securities that are not netted on the Consolidated Balance Sheet against the related collateralized liability. Collateral received or pledged in resale and repurchase agreements with other financial institutions may also be sold or re-pledged by the secured party, and is usually delivered to and held by the third-party trustees.

The following tables present the resale and repurchase agreements included on the Consolidated Balance Sheet as of March 31, 2021 and December 31, 2020:
($ in thousands) March 31, 2021
Gross
Amounts
of Recognized
Assets
Gross Amounts
Offset on the
Consolidated
Balance Sheet
Net Amounts of
Assets Presented
on the Consolidated
Balance Sheet
Gross Amounts Not Offset on the
Consolidated Balance Sheet
Assets Net
Amount
Collateral Received
Resale agreements $ 2,160,038  $ —  $ 2,160,038  $ (2,138,721)
(1)
$ 21,317 
Gross
Amounts
of Recognized
Liabilities
Gross Amounts
Offset on the
Consolidated
Balance Sheet
Net Amounts of
Liabilities Presented
on the Consolidated
Balance Sheet
Gross Amounts Not Offset on the
Consolidated Balance Sheet
Liabilities Net
Amount
Collateral Pledged
Repurchase agreements $ 300,000  $ —  $ 300,000  $ (300,000)
(2)
$ — 
21


($ in thousands) December 31, 2020
Gross
Amounts
of Recognized
Assets
Gross Amounts
Offset on the
Consolidated
Balance Sheet
Net Amounts of
Assets Presented
on the Consolidated
Balance Sheet
Gross Amounts Not Offset on the
Consolidated Balance Sheet
Assets Net
Amount
Collateral Received
Resale agreements $ 1,460,000  $ —  $ 1,460,000  $ (1,458,700)
(1)
$ 1,300 
Gross
Amounts
of Recognized
Liabilities
Gross Amounts
Offset on the
Consolidated
Balance Sheet
Net Amounts of
Liabilities Presented
on the Consolidated
Balance Sheet
Gross Amounts Not Offset on the
Consolidated Balance Sheet
Liabilities Net
Amount
Collateral Pledged
Repurchase agreements $ 300,000  $ —  $ 300,000  $ (300,000)
(2)
$ — 
(1)Represents the fair value of securities the Company has received under resale agreements, limited to the amount of the recognized asset due from each counterparty for presentation purposes. The application of collateral cannot reduce the net position below zero. Therefore, excess collateral, if any, is not reflected above.
(2)Represents the fair value of securities the Company has pledged under repurchase agreements, limited to the amount of the recognized liability due to each counterparty for presentation purpose. The application of collateral cannot reduce the net position below zero. Therefore, excess collateral, if any, is not reflected above.

In addition to the amounts included in the tables above, the Company also has balance sheet netting related to derivatives. Refer to Note 6 Derivatives to the Consolidated Financial Statements in this Form 10-Q for additional information.

Note 5 — Securities

The following tables present the amortized cost, gross unrealized gains and losses and fair value by major categories of AFS debt securities as of March 31, 2021 and December 31, 2020:
($ in thousands) March 31, 2021
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
AFS debt securities:
U.S. Treasury securities $ 841,711  $ 328  $ (15,697) $ 826,342 
U.S. government agency and U.S. government-sponsored enterprise debt securities 1,236,446  5,145  (47,586) 1,194,005 
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities:
Commercial mortgage-backed securities 1,178,238  16,407  (25,254) 1,169,391 
Residential mortgage-backed securities 2,271,645  17,026  (41,265) 2,247,406 
Municipal securities 417,676  7,348  (4,959) 420,065 
Non-agency mortgage-backed securities:
Commercial mortgage-backed securities 281,099  4,311  (4,383)