0000007789001-3134303/31/24FALSE2024Q112/31150,766,697P3YP3Y00000077892024-01-012024-03-310000007789exch:XNYS2024-01-012024-03-310000007789exch:XNYSus-gaap:SeriesEPreferredStockMember2024-01-012024-03-310000007789exch:XNYSus-gaap:SeriesFPreferredStockMember2024-01-012024-03-310000007789asb:TwoThousandTwentyThreeSubordinatedNotesMemberexch:XNYS2024-01-012024-03-3100000077892024-04-26xbrli:shares0000007789us-gaap:FairValueInputsLevel1Member2024-03-31iso4217:USD0000007789us-gaap:FairValueInputsLevel1Member2023-12-3100000077892024-03-3100000077892023-12-310000007789us-gaap:FairValueInputsLevel3Member2024-03-310000007789us-gaap:FairValueInputsLevel3Member2023-12-310000007789us-gaap:FairValueInputsLevel2Member2024-03-310000007789us-gaap:FairValueInputsLevel2Member2023-12-31iso4217:USDxbrli:shares00000077892023-01-012023-03-310000007789us-gaap:FiduciaryAndTrustMember2024-01-012024-03-310000007789us-gaap:FiduciaryAndTrustMember2023-01-012023-03-310000007789us-gaap:DepositAccountMember2024-01-012024-03-310000007789us-gaap:DepositAccountMember2023-01-012023-03-310000007789us-gaap:CreditAndDebitCardMember2024-01-012024-03-310000007789us-gaap:CreditAndDebitCardMember2023-01-012023-03-310000007789us-gaap:FinancialServiceOtherMember2024-01-012024-03-310000007789us-gaap:FinancialServiceOtherMember2023-01-012023-03-310000007789us-gaap:PreferredStockMember2023-12-310000007789us-gaap:CommonStockMember2023-12-310000007789us-gaap:AdditionalPaidInCapitalMember2023-12-310000007789us-gaap:RetainedEarningsMember2023-12-310000007789us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-12-310000007789us-gaap:TreasuryStockCommonMember2023-12-310000007789us-gaap:RetainedEarningsMember2024-01-012024-03-310000007789us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-01-012024-03-310000007789us-gaap:AdditionalPaidInCapitalMember2024-01-012024-03-310000007789us-gaap:TreasuryStockCommonMember2024-01-012024-03-310000007789asb:BoardAuthorizedPurchaseProgramMemberus-gaap:TreasuryStockCommonMember2024-01-012024-03-310000007789asb:BoardAuthorizedPurchaseProgramMember2024-01-012024-03-310000007789asb:PerformanceServiceBasedRSAsRSAMemberus-gaap:TreasuryStockCommonMember2024-01-012024-03-310000007789us-gaap:PreferredStockMember2024-03-310000007789us-gaap:CommonStockMember2024-03-310000007789us-gaap:AdditionalPaidInCapitalMember2024-03-310000007789us-gaap:RetainedEarningsMember2024-03-310000007789us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-03-310000007789us-gaap:TreasuryStockCommonMember2024-03-310000007789us-gaap:SeriesEPreferredStockMember2024-01-012024-03-310000007789us-gaap:SeriesFPreferredStockMember2024-01-012024-03-310000007789us-gaap:PreferredStockMember2022-12-310000007789us-gaap:CommonStockMember2022-12-310000007789us-gaap:AdditionalPaidInCapitalMember2022-12-310000007789us-gaap:RetainedEarningsMember2022-12-310000007789us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-12-310000007789us-gaap:TreasuryStockCommonMember2022-12-3100000077892022-12-310000007789us-gaap:RetainedEarningsMember2023-01-012023-03-310000007789us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-01-012023-03-310000007789us-gaap:AdditionalPaidInCapitalMember2023-01-012023-03-310000007789us-gaap:TreasuryStockCommonMember2023-01-012023-03-310000007789asb:PerformanceServiceBasedRSAsRSAMemberus-gaap:TreasuryStockCommonMember2023-01-012023-03-310000007789us-gaap:PreferredStockMember2023-03-310000007789us-gaap:CommonStockMember2023-03-310000007789us-gaap:AdditionalPaidInCapitalMember2023-03-310000007789us-gaap:RetainedEarningsMember2023-03-310000007789us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-03-310000007789us-gaap:TreasuryStockCommonMember2023-03-3100000077892023-03-310000007789us-gaap:SeriesEPreferredStockMember2023-01-012023-03-310000007789us-gaap:SeriesFPreferredStockMember2023-01-012023-03-310000007789asb:BoardAuthorizedPurchaseProgramMember2023-01-012023-03-310000007789asb:PerformanceServiceBasedRSAsRSAMember2024-01-012024-03-310000007789asb:PerformanceServiceBasedRSAsRSAMember2023-01-012023-03-310000007789us-gaap:OtherLiabilitiesMember2024-01-012024-03-310000007789us-gaap:OtherLiabilitiesMember2023-01-012023-03-310000007789us-gaap:OtherAssetsMember2024-01-012024-03-310000007789us-gaap:OtherAssetsMember2023-01-012023-03-310000007789us-gaap:EmployeeStockOptionMember2024-01-012024-03-310000007789us-gaap:EmployeeStockOptionMember2023-01-012023-03-3100000077892023-01-012023-12-310000007789srt:MinimumMember2024-01-012024-03-31xbrli:pure0000007789srt:MaximumMember2024-01-012024-03-310000007789us-gaap:PerformanceSharesMember2023-01-012023-03-310000007789us-gaap:PerformanceSharesMember2024-01-012024-03-310000007789us-gaap:StockCompensationPlanMember2023-01-012023-03-310000007789us-gaap:StockCompensationPlanMember2024-01-012024-03-310000007789us-gaap:RestrictedStockMember2024-01-012024-03-310000007789us-gaap:RestrictedStockMember2023-01-012023-03-310000007789us-gaap:RestrictedStockMember2024-03-310000007789us-gaap:USTreasurySecuritiesMember2024-03-310000007789us-gaap:USTreasurySecuritiesMember2024-01-012024-03-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMember2024-03-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMember2024-01-012024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMember2024-01-012024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2024-01-012024-03-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-03-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-01-012024-03-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2024-03-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2024-01-012024-03-310000007789us-gaap:FederalFamilyEducationLoanProgramFfelpGuaranteedLoansMember2024-03-310000007789us-gaap:FederalFamilyEducationLoanProgramFfelpGuaranteedLoansMember2024-01-012024-03-310000007789us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2024-03-310000007789us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2024-01-012024-03-310000007789us-gaap:DebtSecuritiesMember2024-03-310000007789us-gaap:DebtSecuritiesMember2024-01-012024-03-310000007789us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2024-03-310000007789us-gaap:USTreasurySecuritiesMember2023-12-310000007789us-gaap:USTreasurySecuritiesMember2023-01-012023-12-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMember2023-12-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMember2023-01-012023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMember2023-01-012023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2023-01-012023-12-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-01-012023-12-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2023-12-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2023-01-012023-12-310000007789us-gaap:FederalFamilyEducationLoanProgramFfelpGuaranteedLoansMember2023-12-310000007789us-gaap:FederalFamilyEducationLoanProgramFfelpGuaranteedLoansMember2023-01-012023-12-310000007789us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2023-12-310000007789us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2023-01-012023-12-310000007789us-gaap:DebtSecuritiesMember2023-12-310000007789us-gaap:DebtSecuritiesMember2023-01-012023-12-310000007789us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2023-12-310000007789us-gaap:USTreasurySecuritiesMembersrt:FitchAAARatingMember2024-03-310000007789us-gaap:USTreasurySecuritiesMembersrt:FitchAARatingMember2024-03-310000007789us-gaap:USTreasurySecuritiesMembersrt:FitchARatingMember2024-03-310000007789us-gaap:USTreasurySecuritiesMemberasb:NotRatedMember2024-03-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMembersrt:FitchAAARatingMember2024-03-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMembersrt:FitchAARatingMember2024-03-310000007789srt:FitchARatingMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2024-03-310000007789asb:NotRatedMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMembersrt:FitchAAARatingMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMembersrt:FitchAARatingMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMembersrt:FitchARatingMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberasb:NotRatedMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMembersrt:FitchAAARatingMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMembersrt:FitchAARatingMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMembersrt:FitchARatingMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberasb:NotRatedMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2024-03-310000007789us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:FitchAAARatingMember2024-03-310000007789us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:FitchAARatingMember2024-03-310000007789srt:FitchARatingMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2024-03-310000007789asb:NotRatedMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2024-03-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMembersrt:FitchAAARatingMember2024-03-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMembersrt:FitchAARatingMember2024-03-310000007789srt:FitchARatingMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-03-310000007789asb:NotRatedMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-03-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMembersrt:FitchAAARatingMember2024-03-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMembersrt:FitchAARatingMember2024-03-310000007789srt:FitchARatingMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2024-03-310000007789asb:NotRatedMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2024-03-310000007789srt:FitchAAARatingMember2024-03-310000007789srt:FitchAARatingMember2024-03-310000007789srt:FitchARatingMember2024-03-310000007789asb:NotRatedMember2024-03-310000007789us-gaap:USTreasurySecuritiesMembersrt:FitchAAARatingMember2023-12-310000007789us-gaap:USTreasurySecuritiesMembersrt:FitchAARatingMember2023-12-310000007789us-gaap:USTreasurySecuritiesMembersrt:FitchARatingMember2023-12-310000007789us-gaap:USTreasurySecuritiesMemberasb:NotRatedMember2023-12-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMembersrt:FitchAAARatingMember2023-12-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMembersrt:FitchAARatingMember2023-12-310000007789srt:FitchARatingMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-12-310000007789asb:NotRatedMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMembersrt:FitchAAARatingMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMembersrt:FitchAARatingMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMembersrt:FitchARatingMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberasb:NotRatedMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMembersrt:FitchAAARatingMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMembersrt:FitchAARatingMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMembersrt:FitchARatingMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberasb:NotRatedMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2023-12-310000007789us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:FitchAAARatingMember2023-12-310000007789us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMembersrt:FitchAARatingMember2023-12-310000007789srt:FitchARatingMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2023-12-310000007789asb:NotRatedMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2023-12-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMembersrt:FitchAAARatingMember2023-12-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMembersrt:FitchAARatingMember2023-12-310000007789srt:FitchARatingMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310000007789asb:NotRatedMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMembersrt:FitchAAARatingMember2023-12-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMembersrt:FitchAARatingMember2023-12-310000007789srt:FitchARatingMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2023-12-310000007789asb:NotRatedMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2023-12-310000007789srt:FitchAAARatingMember2023-12-310000007789srt:FitchAARatingMember2023-12-310000007789srt:FitchARatingMember2023-12-310000007789asb:NotRatedMember2023-12-310000007789us-gaap:EquitySecuritiesMember2024-01-012024-03-310000007789us-gaap:HeldtomaturitySecuritiesMember2024-03-310000007789us-gaap:HeldtomaturitySecuritiesMember2023-12-310000007789us-gaap:AvailableforsaleSecuritiesMember2024-03-310000007789us-gaap:AvailableforsaleSecuritiesMember2023-12-310000007789us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2024-03-310000007789us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2023-12-310000007789us-gaap:USTreasurySecuritiesMember2023-12-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMember2024-03-310000007789us-gaap:USTreasurySecuritiesMember2024-03-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMember2023-12-31asb:security0000007789us-gaap:USTreasurySecuritiesMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMember2024-03-310000007789us-gaap:USTreasurySecuritiesMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2024-03-310000007789asb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2024-03-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2024-03-310000007789us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMember2024-03-310000007789us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2024-03-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-03-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2024-03-310000007789asb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2024-03-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2024-03-310000007789asb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMember2024-03-310000007789asb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2024-03-310000007789us-gaap:USTreasurySecuritiesMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMember2023-12-310000007789us-gaap:USTreasurySecuritiesMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2023-12-310000007789asb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-12-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2023-12-310000007789us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMember2023-12-310000007789us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2023-12-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2023-12-310000007789asb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMember2023-12-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberasb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2023-12-310000007789asb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionslessthanoneyearMember2023-12-310000007789asb:HeldtomaturitysecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositionsgreaterthanorequaltooneyearMember2023-12-310000007789us-gaap:FederalHomeLoanBankCertificatesAndObligationsFHLBMember2024-03-310000007789us-gaap:FederalHomeLoanBankCertificatesAndObligationsFHLBMember2023-12-310000007789asb:FederalReserveBankStockMember2024-03-310000007789asb:FederalReserveBankStockMember2023-12-310000007789us-gaap:CommercialAndIndustrialSectorMember2024-03-310000007789us-gaap:CommercialAndIndustrialSectorMember2023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMember2024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMember2023-12-310000007789asb:CommercialAndBusinessLendingMember2024-03-310000007789asb:CommercialAndBusinessLendingMember2023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMember2024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMember2023-12-310000007789us-gaap:ConstructionLoansMember2024-03-310000007789us-gaap:ConstructionLoansMember2023-12-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMember2024-03-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMember2023-12-310000007789us-gaap:ResidentialMortgageMember2024-03-310000007789us-gaap:ResidentialMortgageMember2023-12-310000007789us-gaap:AutomobileLoanMember2024-03-310000007789us-gaap:AutomobileLoanMember2023-12-310000007789us-gaap:HomeEquityMember2024-03-310000007789us-gaap:HomeEquityMember2023-12-310000007789asb:OtherConsumerMember2024-03-310000007789asb:OtherConsumerMember2023-12-310000007789us-gaap:ConsumerPortfolioSegmentMember2024-03-310000007789us-gaap:ConsumerPortfolioSegmentMember2023-12-310000007789us-gaap:LoansAndFinanceReceivablesMember2024-03-310000007789us-gaap:LoansAndFinanceReceivablesMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:PassMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:SpecialMentionMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:CommercialAndIndustrialSectorMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:NonaccrualLoanMemberus-gaap:CommercialAndIndustrialSectorMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMember2024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMember2024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMember2024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMember2024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:CommercialPortfolioSegmentMemberasb:NonaccrualLoanMember2024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:CommercialPortfolioSegmentMember2024-03-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMember2024-03-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMember2024-03-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMember2024-03-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMemberasb:NonaccrualLoanMember2024-03-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMember2024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMember2024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMember2024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:CommercialPortfolioSegmentMemberasb:NonaccrualLoanMember2024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:CommercialPortfolioSegmentMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:PassMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberasb:NonaccrualLoanMember2024-03-310000007789us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:PassMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:SpecialMentionMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:CommercialRealEstateMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:NonaccrualLoanMemberus-gaap:CommercialRealEstateMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:NonaccrualLoanMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMember2024-03-310000007789us-gaap:PassMemberus-gaap:ResidentialMortgageMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:SpecialMentionMemberus-gaap:ResidentialMortgageMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:SubstandardMemberus-gaap:ResidentialMortgageMemberus-gaap:ConsumerLoanMember2024-03-310000007789asb:NonaccrualLoanMemberus-gaap:ResidentialMortgageMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:ResidentialMortgageMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:AutomobileLoanMemberus-gaap:PassMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:AutomobileLoanMemberus-gaap:SpecialMentionMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:SubstandardMemberus-gaap:AutomobileLoanMemberus-gaap:ConsumerLoanMember2024-03-310000007789asb:NonaccrualLoanMemberus-gaap:AutomobileLoanMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:AutomobileLoanMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:HomeEquityLoanMemberus-gaap:PassMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:HomeEquityLoanMemberus-gaap:SpecialMentionMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:SubstandardMemberus-gaap:HomeEquityLoanMemberus-gaap:ConsumerLoanMember2024-03-310000007789asb:NonaccrualLoanMemberus-gaap:HomeEquityLoanMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:HomeEquityLoanMemberus-gaap:ConsumerLoanMember2024-03-310000007789asb:OtherConsumerMemberus-gaap:PassMemberus-gaap:ConsumerLoanMember2024-03-310000007789asb:OtherConsumerMemberus-gaap:SpecialMentionMemberus-gaap:ConsumerLoanMember2024-03-310000007789asb:OtherConsumerMemberus-gaap:SubstandardMemberus-gaap:ConsumerLoanMember2024-03-310000007789asb:OtherConsumerMemberasb:NonaccrualLoanMemberus-gaap:ConsumerLoanMember2024-03-310000007789asb:OtherConsumerMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:PassMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:SpecialMentionMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:SubstandardMemberus-gaap:ConsumerLoanMember2024-03-310000007789asb:NonaccrualLoanMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:PassMember2024-03-310000007789us-gaap:SpecialMentionMember2024-03-310000007789us-gaap:SubstandardMember2024-03-310000007789asb:NonaccrualLoanMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:PassMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:SpecialMentionMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:CommercialAndIndustrialSectorMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:NonaccrualLoanMemberus-gaap:CommercialAndIndustrialSectorMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMember2023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMember2023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMember2023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMember2023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:CommercialPortfolioSegmentMemberasb:NonaccrualLoanMember2023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMember2023-12-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMember2023-12-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMember2023-12-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMemberasb:NonaccrualLoanMember2023-12-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMember2023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMember2023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMember2023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:PassMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberasb:NonaccrualLoanMember2023-12-310000007789us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:PassMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:SpecialMentionMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:CommercialRealEstateMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:NonaccrualLoanMemberus-gaap:CommercialRealEstateMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:NonaccrualLoanMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMember2023-12-310000007789us-gaap:PassMemberus-gaap:ResidentialMortgageMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:SpecialMentionMemberus-gaap:ResidentialMortgageMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:SubstandardMemberus-gaap:ResidentialMortgageMemberus-gaap:ConsumerLoanMember2023-12-310000007789asb:NonaccrualLoanMemberus-gaap:ResidentialMortgageMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:ResidentialMortgageMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:AutomobileLoanMemberus-gaap:PassMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:AutomobileLoanMemberus-gaap:SpecialMentionMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:SubstandardMemberus-gaap:AutomobileLoanMemberus-gaap:ConsumerLoanMember2023-12-310000007789asb:NonaccrualLoanMemberus-gaap:AutomobileLoanMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:AutomobileLoanMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:HomeEquityLoanMemberus-gaap:PassMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:HomeEquityLoanMemberus-gaap:SpecialMentionMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:SubstandardMemberus-gaap:HomeEquityLoanMemberus-gaap:ConsumerLoanMember2023-12-310000007789asb:NonaccrualLoanMemberus-gaap:HomeEquityLoanMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:HomeEquityLoanMemberus-gaap:ConsumerLoanMember2023-12-310000007789asb:OtherConsumerMemberus-gaap:PassMemberus-gaap:ConsumerLoanMember2023-12-310000007789asb:OtherConsumerMemberus-gaap:SpecialMentionMemberus-gaap:ConsumerLoanMember2023-12-310000007789asb:OtherConsumerMemberus-gaap:SubstandardMemberus-gaap:ConsumerLoanMember2023-12-310000007789asb:OtherConsumerMemberasb:NonaccrualLoanMemberus-gaap:ConsumerLoanMember2023-12-310000007789asb:OtherConsumerMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:PassMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:SpecialMentionMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:SubstandardMemberus-gaap:ConsumerLoanMember2023-12-310000007789asb:NonaccrualLoanMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:PassMember2023-12-310000007789us-gaap:SpecialMentionMember2023-12-310000007789us-gaap:SubstandardMember2023-12-310000007789asb:NonaccrualLoanMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMember2024-01-012024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-03-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-03-310000007789us-gaap:CommercialPortfolioSegmentMember2024-01-012024-03-310000007789us-gaap:ResidentialMortgageMemberus-gaap:ConsumerLoanMember2024-01-012024-03-310000007789us-gaap:AutomobileLoanMemberus-gaap:ConsumerLoanMember2024-01-012024-03-310000007789us-gaap:HomeEquityLoanMemberus-gaap:ConsumerLoanMember2024-01-012024-03-310000007789asb:OtherConsumerMemberus-gaap:ConsumerLoanMember2024-01-012024-03-310000007789us-gaap:ConsumerLoanMember2024-01-012024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMember2023-01-012023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310000007789us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2023-01-012023-12-310000007789us-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310000007789us-gaap:ResidentialMortgageMemberus-gaap:ConsumerLoanMember2023-01-012023-12-310000007789us-gaap:AutomobileLoanMemberus-gaap:ConsumerLoanMember2023-01-012023-12-310000007789us-gaap:HomeEquityLoanMemberus-gaap:ConsumerLoanMember2023-01-012023-12-310000007789asb:OtherConsumerMemberus-gaap:ConsumerLoanMember2023-01-012023-12-310000007789us-gaap:ConsumerLoanMember2023-01-012023-12-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialAndIndustrialSectorMember2024-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-03-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-03-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-03-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-03-310000007789us-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-03-310000007789us-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-03-310000007789us-gaap:ConstructionLoansMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-03-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2024-03-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-03-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-03-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-03-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ResidentialMortgageMember2024-03-310000007789us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ResidentialMortgageMember2024-03-310000007789us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-03-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:AutomobileLoanMember2024-03-310000007789us-gaap:AutomobileLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-03-310000007789us-gaap:AutomobileLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-03-310000007789us-gaap:HomeEquityLoanMember2024-03-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:HomeEquityLoanMember2024-03-310000007789us-gaap:HomeEquityLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-03-310000007789us-gaap:HomeEquityLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-03-310000007789asb:OtherConsumerMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-03-310000007789asb:OtherConsumerMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-03-310000007789asb:OtherConsumerMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-03-310000007789us-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ConsumerLoanMember2024-03-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMember2024-03-310000007789us-gaap:FinancingReceivables60To89DaysPastDueMember2024-03-310000007789us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-03-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialAndIndustrialSectorMember2023-12-310000007789us-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310000007789us-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310000007789us-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310000007789us-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310000007789us-gaap:ConstructionLoansMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-12-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ResidentialMortgageMember2023-12-310000007789us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ResidentialMortgageMember2023-12-310000007789us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:AutomobileLoanMember2023-12-310000007789us-gaap:AutomobileLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310000007789us-gaap:AutomobileLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310000007789us-gaap:HomeEquityLoanMember2023-12-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:HomeEquityLoanMember2023-12-310000007789us-gaap:HomeEquityLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310000007789us-gaap:HomeEquityLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310000007789asb:OtherConsumerMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310000007789asb:OtherConsumerMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310000007789asb:OtherConsumerMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310000007789us-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ConsumerLoanMember2023-12-310000007789us-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310000007789us-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310000007789us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310000007789us-gaap:InterestRateBelowMarketReductionMemberus-gaap:CommercialAndIndustrialSectorMember2024-01-012024-03-310000007789us-gaap:InterestRateBelowMarketReductionMemberus-gaap:CommercialAndIndustrialSectorMember2023-01-012023-03-310000007789us-gaap:InterestRateBelowMarketReductionMemberus-gaap:AutomobileLoanMember2024-01-012024-03-310000007789us-gaap:InterestRateBelowMarketReductionMemberus-gaap:AutomobileLoanMember2023-01-012023-03-310000007789us-gaap:InterestRateBelowMarketReductionMemberus-gaap:HomeEquityLoanMember2024-01-012024-03-310000007789us-gaap:InterestRateBelowMarketReductionMemberus-gaap:HomeEquityLoanMember2023-01-012023-03-310000007789asb:OtherConsumerMemberus-gaap:InterestRateBelowMarketReductionMember2024-01-012024-03-310000007789asb:OtherConsumerMemberus-gaap:InterestRateBelowMarketReductionMember2023-01-012023-03-310000007789us-gaap:InterestRateBelowMarketReductionMember2024-01-012024-03-310000007789us-gaap:InterestRateBelowMarketReductionMember2023-01-012023-03-310000007789us-gaap:ExtendedMaturityMemberus-gaap:ResidentialMortgageMember2024-01-012024-03-310000007789us-gaap:ExtendedMaturityMemberus-gaap:ResidentialMortgageMember2023-01-012023-03-310000007789us-gaap:ExtendedMaturityMember2024-01-012024-03-310000007789us-gaap:ExtendedMaturityMember2023-01-012023-03-310000007789us-gaap:ResidentialMortgageMemberus-gaap:ExtendedMaturityAndInterestRateReductionMember2024-01-012024-03-310000007789us-gaap:ResidentialMortgageMemberus-gaap:ExtendedMaturityAndInterestRateReductionMember2023-01-012023-03-310000007789us-gaap:HomeEquityLoanMemberus-gaap:ExtendedMaturityAndInterestRateReductionMember2024-01-012024-03-310000007789us-gaap:HomeEquityLoanMemberus-gaap:ExtendedMaturityAndInterestRateReductionMember2023-01-012023-03-310000007789us-gaap:ExtendedMaturityAndInterestRateReductionMember2024-01-012024-03-310000007789us-gaap:ExtendedMaturityAndInterestRateReductionMember2023-01-012023-03-310000007789us-gaap:InterestRateBelowMarketReductionMemberus-gaap:ResidentialMortgageMember2024-01-012024-03-310000007789us-gaap:InterestRateBelowMarketReductionMemberus-gaap:ResidentialMortgageMember2023-01-012023-03-310000007789us-gaap:ExtendedMaturityMemberus-gaap:HomeEquityLoanMember2024-01-012024-03-310000007789us-gaap:ExtendedMaturityMemberus-gaap:HomeEquityLoanMember2023-01-012023-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancialAssetNotPastDueMember2024-01-012024-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:FinancialAsset3089DaysPastDueMember2024-01-012024-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-01-012024-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:FinancialAssetNonaccrualMember2024-01-012024-03-310000007789us-gaap:FinancialAssetNotPastDueMemberus-gaap:ResidentialMortgageMember2024-01-012024-03-310000007789asb:FinancialAsset3089DaysPastDueMemberus-gaap:ResidentialMortgageMember2024-01-012024-03-310000007789us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-01-012024-03-310000007789asb:FinancialAssetNonaccrualMemberus-gaap:ResidentialMortgageMember2024-01-012024-03-310000007789us-gaap:AutomobileLoanMemberus-gaap:FinancialAssetNotPastDueMember2024-01-012024-03-310000007789us-gaap:AutomobileLoanMemberasb:FinancialAsset3089DaysPastDueMember2024-01-012024-03-310000007789us-gaap:AutomobileLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-01-012024-03-310000007789us-gaap:AutomobileLoanMemberasb:FinancialAssetNonaccrualMember2024-01-012024-03-310000007789us-gaap:FinancialAssetNotPastDueMemberus-gaap:HomeEquityLoanMember2024-01-012024-03-310000007789us-gaap:HomeEquityLoanMemberasb:FinancialAsset3089DaysPastDueMember2024-01-012024-03-310000007789us-gaap:HomeEquityLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-01-012024-03-310000007789asb:FinancialAssetNonaccrualMemberus-gaap:HomeEquityLoanMember2024-01-012024-03-310000007789asb:OtherConsumerMemberus-gaap:FinancialAssetNotPastDueMember2024-01-012024-03-310000007789asb:OtherConsumerMemberasb:FinancialAsset3089DaysPastDueMember2024-01-012024-03-310000007789asb:OtherConsumerMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-01-012024-03-310000007789asb:OtherConsumerMemberasb:FinancialAssetNonaccrualMember2024-01-012024-03-310000007789us-gaap:FinancialAssetNotPastDueMember2024-01-012024-03-310000007789asb:FinancialAsset3089DaysPastDueMember2024-01-012024-03-310000007789us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-01-012024-03-310000007789asb:FinancialAssetNonaccrualMember2024-01-012024-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancialAssetNotPastDueMember2023-01-012023-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:FinancialAsset3089DaysPastDueMember2023-01-012023-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-01-012023-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:FinancialAssetNonaccrualMember2023-01-012023-03-310000007789us-gaap:FinancialAssetNotPastDueMemberus-gaap:ResidentialMortgageMember2023-01-012023-03-310000007789asb:FinancialAsset3089DaysPastDueMemberus-gaap:ResidentialMortgageMember2023-01-012023-03-310000007789us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-01-012023-03-310000007789asb:FinancialAssetNonaccrualMemberus-gaap:ResidentialMortgageMember2023-01-012023-03-310000007789us-gaap:AutomobileLoanMemberus-gaap:FinancialAssetNotPastDueMember2023-01-012023-03-310000007789us-gaap:AutomobileLoanMemberasb:FinancialAsset3089DaysPastDueMember2023-01-012023-03-310000007789us-gaap:AutomobileLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-01-012023-03-310000007789us-gaap:AutomobileLoanMemberasb:FinancialAssetNonaccrualMember2023-01-012023-03-310000007789us-gaap:FinancialAssetNotPastDueMemberus-gaap:HomeEquityLoanMember2023-01-012023-03-310000007789us-gaap:HomeEquityLoanMemberasb:FinancialAsset3089DaysPastDueMember2023-01-012023-03-310000007789us-gaap:HomeEquityLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-01-012023-03-310000007789asb:FinancialAssetNonaccrualMemberus-gaap:HomeEquityLoanMember2023-01-012023-03-310000007789asb:OtherConsumerMemberus-gaap:FinancialAssetNotPastDueMember2023-01-012023-03-310000007789asb:OtherConsumerMemberasb:FinancialAsset3089DaysPastDueMember2023-01-012023-03-310000007789asb:OtherConsumerMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-01-012023-03-310000007789asb:OtherConsumerMemberasb:FinancialAssetNonaccrualMember2023-01-012023-03-310000007789us-gaap:FinancialAssetNotPastDueMember2023-01-012023-03-310000007789asb:FinancialAsset3089DaysPastDueMember2023-01-012023-03-310000007789us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-01-012023-03-310000007789asb:FinancialAssetNonaccrualMember2023-01-012023-03-310000007789us-gaap:ExtendedMaturityMemberus-gaap:AutomobileLoanMember2024-01-012024-03-310000007789us-gaap:AutomobileLoanMemberus-gaap:ExtendedMaturityAndInterestRateReductionMember2024-01-012024-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:AllowanceForLoanLossesMember2023-12-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:AllowanceForLoanLossesMember2024-01-012024-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:AllowanceForLoanLossesMember2024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberasb:AllowanceForLoanLossesMember2023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberasb:AllowanceForLoanLossesMember2024-01-012024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberasb:AllowanceForLoanLossesMember2024-03-310000007789asb:CommercialAndBusinessLendingMemberasb:AllowanceForLoanLossesMember2023-12-310000007789asb:CommercialAndBusinessLendingMemberasb:AllowanceForLoanLossesMember2024-01-012024-03-310000007789asb:CommercialAndBusinessLendingMemberasb:AllowanceForLoanLossesMember2024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2024-01-012024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2024-03-310000007789us-gaap:ConstructionLoansMemberasb:AllowanceForLoanLossesMember2023-12-310000007789us-gaap:ConstructionLoansMemberasb:AllowanceForLoanLossesMember2024-01-012024-03-310000007789us-gaap:ConstructionLoansMemberasb:AllowanceForLoanLossesMember2024-03-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberasb:AllowanceForLoanLossesMember2023-12-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberasb:AllowanceForLoanLossesMember2024-01-012024-03-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberasb:AllowanceForLoanLossesMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2024-01-012024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2024-03-310000007789asb:AllowanceForLoanLossesMemberus-gaap:ResidentialMortgageMember2023-12-310000007789asb:AllowanceForLoanLossesMemberus-gaap:ResidentialMortgageMember2024-01-012024-03-310000007789asb:AllowanceForLoanLossesMemberus-gaap:ResidentialMortgageMember2024-03-310000007789us-gaap:AutomobileLoanMemberasb:AllowanceForLoanLossesMember2023-12-310000007789us-gaap:AutomobileLoanMemberasb:AllowanceForLoanLossesMember2024-01-012024-03-310000007789us-gaap:AutomobileLoanMemberasb:AllowanceForLoanLossesMember2024-03-310000007789asb:AllowanceForLoanLossesMemberus-gaap:HomeEquityMember2023-12-310000007789asb:AllowanceForLoanLossesMemberus-gaap:HomeEquityMember2024-01-012024-03-310000007789asb:AllowanceForLoanLossesMemberus-gaap:HomeEquityMember2024-03-310000007789asb:OtherConsumerMemberasb:AllowanceForLoanLossesMember2023-12-310000007789asb:OtherConsumerMemberasb:AllowanceForLoanLossesMember2024-01-012024-03-310000007789asb:OtherConsumerMemberasb:AllowanceForLoanLossesMember2024-03-310000007789us-gaap:ConsumerPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2023-12-310000007789us-gaap:ConsumerPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2024-01-012024-03-310000007789us-gaap:ConsumerPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2024-03-310000007789asb:AllowanceForLoanLossesMember2023-12-310000007789asb:AllowanceForLoanLossesMember2024-01-012024-03-310000007789asb:AllowanceForLoanLossesMember2024-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-12-310000007789us-gaap:CommercialAndIndustrialSectorMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-01-012024-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-01-012024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-03-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-12-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-01-012024-03-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-01-012024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-03-310000007789us-gaap:ConstructionLoansMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-12-310000007789us-gaap:ConstructionLoansMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-01-012024-03-310000007789us-gaap:ConstructionLoansMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-03-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-12-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-01-012024-03-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-01-012024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-03-310000007789us-gaap:HomeEquityMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-12-310000007789us-gaap:HomeEquityMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-01-012024-03-310000007789us-gaap:HomeEquityMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-03-310000007789asb:OtherConsumerMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-12-310000007789asb:OtherConsumerMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-01-012024-03-310000007789asb:OtherConsumerMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-03-310000007789us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-12-310000007789us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-01-012024-03-310000007789us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2024-03-310000007789us-gaap:ReserveForOffBalanceSheetActivitiesMember2023-12-310000007789us-gaap:ReserveForOffBalanceSheetActivitiesMember2024-01-012024-03-310000007789us-gaap:ReserveForOffBalanceSheetActivitiesMember2024-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-12-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-01-012024-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-01-012024-03-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-03-310000007789asb:CommercialAndBusinessLendingMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-12-310000007789asb:CommercialAndBusinessLendingMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-01-012024-03-310000007789asb:CommercialAndBusinessLendingMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-01-012024-03-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-03-310000007789us-gaap:ConstructionLoansMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-12-310000007789us-gaap:ConstructionLoansMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-01-012024-03-310000007789us-gaap:ConstructionLoansMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-03-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-12-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-01-012024-03-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-01-012024-03-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-03-310000007789asb:AllowanceForLoansLossesAndUnfundedCommitmentsMemberus-gaap:ResidentialMortgageMember2023-12-310000007789asb:AllowanceForLoansLossesAndUnfundedCommitmentsMemberus-gaap:ResidentialMortgageMember2024-01-012024-03-310000007789asb:AllowanceForLoansLossesAndUnfundedCommitmentsMemberus-gaap:ResidentialMortgageMember2024-03-310000007789us-gaap:AutomobileLoanMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-12-310000007789us-gaap:AutomobileLoanMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-01-012024-03-310000007789us-gaap:AutomobileLoanMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-03-310000007789us-gaap:HomeEquityMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-12-310000007789us-gaap:HomeEquityMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-01-012024-03-310000007789us-gaap:HomeEquityMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-03-310000007789asb:OtherConsumerMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-12-310000007789asb:OtherConsumerMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-01-012024-03-310000007789asb:OtherConsumerMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-03-310000007789us-gaap:ConsumerPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-12-310000007789us-gaap:ConsumerPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-01-012024-03-310000007789us-gaap:ConsumerPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-03-310000007789asb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-12-310000007789asb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-01-012024-03-310000007789asb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2024-03-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:AllowanceForLoanLossesMember2022-12-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:AllowanceForLoanLossesMember2023-01-012023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberasb:AllowanceForLoanLossesMember2022-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberasb:AllowanceForLoanLossesMember2023-01-012023-12-310000007789asb:CommercialAndBusinessLendingMemberasb:AllowanceForLoanLossesMember2022-12-310000007789asb:CommercialAndBusinessLendingMemberasb:AllowanceForLoanLossesMember2023-01-012023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2022-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2023-01-012023-12-310000007789us-gaap:ConstructionLoansMemberasb:AllowanceForLoanLossesMember2022-12-310000007789us-gaap:ConstructionLoansMemberasb:AllowanceForLoanLossesMember2023-01-012023-12-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberasb:AllowanceForLoanLossesMember2022-12-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberasb:AllowanceForLoanLossesMember2023-01-012023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2022-12-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2023-01-012023-12-310000007789asb:AllowanceForLoanLossesMemberus-gaap:ResidentialMortgageMember2022-12-310000007789asb:AllowanceForLoanLossesMemberus-gaap:ResidentialMortgageMember2023-01-012023-12-310000007789us-gaap:AutomobileLoanMemberasb:AllowanceForLoanLossesMember2022-12-310000007789us-gaap:AutomobileLoanMemberasb:AllowanceForLoanLossesMember2023-01-012023-12-310000007789asb:AllowanceForLoanLossesMemberus-gaap:HomeEquityMember2022-12-310000007789asb:AllowanceForLoanLossesMemberus-gaap:HomeEquityMember2023-01-012023-12-310000007789asb:OtherConsumerMemberasb:AllowanceForLoanLossesMember2022-12-310000007789asb:OtherConsumerMemberasb:AllowanceForLoanLossesMember2023-01-012023-12-310000007789us-gaap:ConsumerPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2022-12-310000007789us-gaap:ConsumerPortfolioSegmentMemberasb:AllowanceForLoanLossesMember2023-01-012023-12-310000007789asb:AllowanceForLoanLossesMember2022-12-310000007789asb:AllowanceForLoanLossesMember2023-01-012023-12-310000007789us-gaap:CommercialAndIndustrialSectorMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2022-12-310000007789us-gaap:CommercialAndIndustrialSectorMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-01-012023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2022-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-01-012023-12-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2022-12-310000007789asb:CommercialAndBusinessLendingMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-01-012023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2022-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-01-012023-12-310000007789us-gaap:ConstructionLoansMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2022-12-310000007789us-gaap:ConstructionLoansMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-01-012023-12-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2022-12-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-01-012023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2022-12-310000007789us-gaap:CommercialPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-01-012023-12-310000007789us-gaap:HomeEquityMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2022-12-310000007789us-gaap:HomeEquityMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-01-012023-12-310000007789asb:OtherConsumerMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2022-12-310000007789asb:OtherConsumerMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-01-012023-12-310000007789us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2022-12-310000007789us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ReserveForOffBalanceSheetActivitiesMember2023-01-012023-12-310000007789us-gaap:ReserveForOffBalanceSheetActivitiesMember2022-12-310000007789us-gaap:ReserveForOffBalanceSheetActivitiesMember2023-01-012023-12-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2022-12-310000007789us-gaap:CommercialAndIndustrialSectorMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-01-012023-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2022-12-310000007789asb:CommercialRealEstateOwnerOccupiedPortfolioMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-01-012023-12-310000007789asb:CommercialAndBusinessLendingMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2022-12-310000007789asb:CommercialAndBusinessLendingMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-01-012023-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2022-12-310000007789asb:CommercialRealEstateInvestorPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-01-012023-12-310000007789us-gaap:ConstructionLoansMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2022-12-310000007789us-gaap:ConstructionLoansMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-01-012023-12-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2022-12-310000007789us-gaap:CommercialRealEstatePortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-01-012023-12-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2022-12-310000007789us-gaap:CommercialPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-01-012023-12-310000007789asb:AllowanceForLoansLossesAndUnfundedCommitmentsMemberus-gaap:ResidentialMortgageMember2022-12-310000007789asb:AllowanceForLoansLossesAndUnfundedCommitmentsMemberus-gaap:ResidentialMortgageMember2023-01-012023-12-310000007789us-gaap:AutomobileLoanMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2022-12-310000007789us-gaap:AutomobileLoanMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-01-012023-12-310000007789us-gaap:HomeEquityMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2022-12-310000007789us-gaap:HomeEquityMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-01-012023-12-310000007789asb:OtherConsumerMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2022-12-310000007789asb:OtherConsumerMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-01-012023-12-310000007789us-gaap:ConsumerPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2022-12-310000007789us-gaap:ConsumerPortfolioSegmentMemberasb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-01-012023-12-310000007789asb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2022-12-310000007789asb:AllowanceForLoansLossesAndUnfundedCommitmentsMember2023-01-012023-12-310000007789us-gaap:CoreDepositsMember2023-12-310000007789us-gaap:CoreDepositsMember2022-12-310000007789us-gaap:CoreDepositsMember2024-03-310000007789us-gaap:CoreDepositsMember2024-01-012024-03-310000007789us-gaap:CoreDepositsMember2023-01-012023-12-310000007789us-gaap:ResidentialMortgageMember2023-10-012023-12-310000007789us-gaap:ServicingContractsMember2024-03-310000007789us-gaap:FairValueHedgingMember2024-03-310000007789us-gaap:FairValueHedgingMember2023-12-310000007789us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMemberus-gaap:MaturityOvernightAndOnDemandMember2024-03-310000007789us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMemberus-gaap:MaturityOvernightAndOnDemandMember2023-12-310000007789asb:TwoThousandFourteenSubordinatedNotesMember2014-11-012014-11-300000007789asb:TwoThousandTwentyThreeSubordinatedNotesMember2023-02-102023-02-100000007789us-gaap:OtherAssetsMemberasb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberus-gaap:DesignatedAsHedgingInstrumentMember2024-03-310000007789us-gaap:FairValueInputsLevel2Memberasb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789asb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherLiabilitiesMember2024-03-310000007789us-gaap:OtherAssetsMemberasb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberus-gaap:DesignatedAsHedgingInstrumentMember2023-12-310000007789us-gaap:FairValueInputsLevel2Memberasb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789asb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherLiabilitiesMember2023-12-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:OtherAssetsMemberus-gaap:DesignatedAsHedgingInstrumentMember2024-03-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:FairValueInputsLevel2Memberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherLiabilitiesMember2024-03-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:OtherAssetsMemberus-gaap:DesignatedAsHedgingInstrumentMember2023-12-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:FairValueInputsLevel2Memberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherLiabilitiesMember2023-12-310000007789us-gaap:OtherAssetsMemberus-gaap:DesignatedAsHedgingInstrumentMember2024-03-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherLiabilitiesMember2024-03-310000007789us-gaap:OtherAssetsMemberus-gaap:DesignatedAsHedgingInstrumentMember2023-12-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherLiabilitiesMember2023-12-310000007789us-gaap:OtherAssetsMemberasb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberus-gaap:NondesignatedMember2024-03-310000007789us-gaap:FairValueInputsLevel2Memberasb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789asb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberus-gaap:NondesignatedMemberus-gaap:OtherLiabilitiesMember2024-03-310000007789us-gaap:OtherAssetsMemberasb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberus-gaap:NondesignatedMember2023-12-310000007789us-gaap:FairValueInputsLevel2Memberasb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789asb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberus-gaap:NondesignatedMemberus-gaap:OtherLiabilitiesMember2023-12-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:OtherAssetsMemberus-gaap:NondesignatedMember2024-03-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:NondesignatedMemberus-gaap:OtherLiabilitiesMember2024-03-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:OtherAssetsMemberus-gaap:NondesignatedMember2023-12-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:NondesignatedMemberus-gaap:OtherLiabilitiesMember2023-12-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:OtherAssetsMemberus-gaap:NondesignatedMember2024-03-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789asb:ForwardCommitmentsToSellResidentialMortgageLoansMemberus-gaap:NondesignatedMemberus-gaap:OtherLiabilitiesMember2024-03-310000007789asb:ForwardCommitmentsToSellResidentialMortgageLoansMemberus-gaap:FairValueInputsLevel3Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:OtherAssetsMemberus-gaap:NondesignatedMember2023-12-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789asb:ForwardCommitmentsToSellResidentialMortgageLoansMemberus-gaap:NondesignatedMemberus-gaap:OtherLiabilitiesMember2023-12-310000007789asb:ForwardCommitmentsToSellResidentialMortgageLoansMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:OtherAssetsMemberus-gaap:NondesignatedMember2024-03-310000007789us-gaap:NondesignatedMemberus-gaap:OtherLiabilitiesMember2024-03-310000007789us-gaap:OtherAssetsMemberus-gaap:NondesignatedMember2023-12-310000007789us-gaap:NondesignatedMemberus-gaap:OtherLiabilitiesMember2023-12-310000007789us-gaap:OtherAssetsMember2024-03-310000007789us-gaap:OtherLiabilitiesMember2024-03-310000007789us-gaap:OtherAssetsMember2023-12-310000007789us-gaap:OtherLiabilitiesMember2023-12-310000007789us-gaap:LongTermDebtMemberus-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2024-03-310000007789us-gaap:FairValueHedgingMemberus-gaap:LongTermDebtMember2024-03-310000007789us-gaap:LongTermDebtMemberus-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2023-12-310000007789us-gaap:FairValueHedgingMemberus-gaap:LongTermDebtMember2023-12-310000007789us-gaap:FederalHomeLoanBankAdvancesMemberus-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2024-03-310000007789us-gaap:FairValueHedgingMemberus-gaap:FederalHomeLoanBankAdvancesMember2024-03-310000007789us-gaap:FederalHomeLoanBankAdvancesMemberus-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2023-12-310000007789us-gaap:FairValueHedgingMemberus-gaap:FederalHomeLoanBankAdvancesMember2023-12-310000007789us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2024-03-310000007789us-gaap:FairValueHedgingMember2024-03-310000007789us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2023-12-310000007789us-gaap:FairValueHedgingMember2023-12-3100000077892020-12-310000007789us-gaap:DesignatedAsHedgingInstrumentMember2024-03-310000007789us-gaap:InterestIncomeMember2024-01-012024-03-310000007789us-gaap:InterestExpenseMember2024-01-012024-03-310000007789us-gaap:InterestIncomeMember2023-01-012023-03-310000007789us-gaap:InterestExpenseMember2023-01-012023-03-310000007789us-gaap:FairValueHedgingMemberus-gaap:InterestIncomeMember2024-01-012024-03-310000007789us-gaap:FairValueHedgingMemberus-gaap:InterestExpenseMember2024-01-012024-03-310000007789us-gaap:FairValueHedgingMemberus-gaap:InterestIncomeMember2023-01-012023-03-310000007789us-gaap:FairValueHedgingMemberus-gaap:InterestExpenseMember2023-01-012023-03-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestIncomeMember2024-01-012024-03-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestExpenseMember2024-01-012024-03-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestIncomeMember2023-01-012023-03-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestExpenseMember2023-01-012023-03-310000007789asb:CapitalMarketFeesMember2024-01-012024-03-310000007789asb:CapitalMarketFeesMember2023-01-012023-03-310000007789us-gaap:FairValueHedgingMemberasb:CapitalMarketFeesMember2024-01-012024-03-310000007789us-gaap:FairValueHedgingMemberasb:CapitalMarketFeesMember2023-01-012023-03-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberasb:CapitalMarketFeesMember2024-01-012024-03-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberasb:CapitalMarketFeesMember2023-01-012023-03-310000007789asb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberasb:CapitalMarketFeesMember2024-01-012024-03-310000007789asb:InterestRateRelatedInstrumentsCustomerAndMirrorMemberasb:CapitalMarketFeesMember2023-01-012023-03-310000007789us-gaap:MortgageBankingMemberasb:InterestRateRelatedInstrumentsMSRsHedgeMember2024-01-012024-03-310000007789us-gaap:MortgageBankingMemberasb:InterestRateRelatedInstrumentsMSRsHedgeMember2023-01-012023-03-310000007789us-gaap:ForeignExchangeForwardMemberasb:CapitalMarketFeesMember2024-01-012024-03-310000007789us-gaap:ForeignExchangeForwardMemberasb:CapitalMarketFeesMember2023-01-012023-03-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:MortgageBankingMember2024-01-012024-03-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:MortgageBankingMember2023-01-012023-03-310000007789us-gaap:MortgageBankingMemberus-gaap:ForwardContractsMember2024-01-012024-03-310000007789us-gaap:MortgageBankingMemberus-gaap:ForwardContractsMember2023-01-012023-03-310000007789us-gaap:InterestRateContractMember2024-03-310000007789us-gaap:InterestRateContractMember2023-12-310000007789us-gaap:CommitmentsToExtendCreditMember2024-03-310000007789us-gaap:CommitmentsToExtendCreditMember2023-12-310000007789us-gaap:LetterOfCreditMember2024-03-310000007789us-gaap:LetterOfCreditMember2023-12-310000007789us-gaap:StandbyLettersOfCreditMember2024-03-310000007789us-gaap:StandbyLettersOfCreditMember2023-12-310000007789asb:UnconsolidatedProjectsLowIncomeHousingMember2024-03-310000007789asb:UnconsolidatedProjectsLowIncomeHousingMember2023-12-3100000077892023-01-012023-06-300000007789asb:PrincipalInvestmentCommitmentMember2024-03-310000007789us-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:FederalFamilyEducationLoanProgramFfelpGuaranteedLoansMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:FederalFamilyEducationLoanProgramFfelpGuaranteedLoansMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:FederalFamilyEducationLoanProgramFfelpGuaranteedLoansMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FederalFamilyEducationLoanProgramFfelpGuaranteedLoansMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:AvailableforsaleSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:AvailableforsaleSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:AvailableforsaleSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2024-03-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2024-03-310000007789us-gaap:HeldtomaturitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:HeldtomaturitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:HeldtomaturitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:HeldtomaturitySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:FairValueMeasurementsRecurringMemberasb:FairValueInputsNAVMember2024-03-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2024-03-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateContractMember2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2024-03-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:FairValueInputsLevel3Memberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2024-03-310000007789us-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateContractMember2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2024-03-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:FairValueInputsLevel2Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:FairValueInputsLevel3Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:CommitmentsMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:CommitmentsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2024-03-310000007789us-gaap:CommitmentsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:CommitmentsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:UsGovernmentSponsoredEnterpriseInsuredLoansMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:GovernmentNationalMortgageAssociationGnmaInsuredLoansMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:FederalFamilyEducationLoanProgramFfelpGuaranteedLoansMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:FederalFamilyEducationLoanProgramFfelpGuaranteedLoansMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:FederalFamilyEducationLoanProgramFfelpGuaranteedLoansMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FederalFamilyEducationLoanProgramFfelpGuaranteedLoansMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:AvailableforsaleSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:AvailableforsaleSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:AvailableforsaleSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2023-12-310000007789us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2023-12-310000007789us-gaap:HeldtomaturitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:HeldtomaturitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:HeldtomaturitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:HeldtomaturitySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:FairValueMeasurementsRecurringMemberasb:FairValueInputsNAVMember2023-12-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:InterestRateLockCommitmentsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2023-12-310000007789us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateContractMember2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2023-12-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:FairValueInputsLevel3Memberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2023-12-310000007789us-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateContractMember2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateContractMember2023-12-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:FairValueInputsLevel2Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:ForeignExchangeForwardMemberus-gaap:FairValueInputsLevel3Memberus-gaap:NondesignatedMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:CommitmentsMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:CommitmentsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2023-12-310000007789us-gaap:CommitmentsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:CommitmentsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:DerivativeFinancialInstrumentsAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2022-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DerivativeMember2022-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:DerivativeFinancialInstrumentsAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2023-01-012023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2023-01-012023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DerivativeMember2023-01-012023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:DerivativeFinancialInstrumentsAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DerivativeMember2023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:DerivativeFinancialInstrumentsAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2024-01-012024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2024-01-012024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DerivativeMember2024-01-012024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:DerivativeFinancialInstrumentsAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:DerivativeMember2024-03-310000007789us-gaap:FairValueInputsLevel3Member2022-12-310000007789us-gaap:FairValueInputsLevel3Member2023-01-012023-12-310000007789us-gaap:FairValueInputsLevel3Member2024-01-012024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2024-01-012024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMember2024-03-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMember2024-01-012024-03-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2023-12-310000007789us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2023-01-012023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMember2023-12-310000007789us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMember2023-01-012023-12-310000007789us-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Membersrt:MinimumMemberus-gaap:ServicingContractsMember2024-01-012024-03-310000007789us-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ServicingContractsMember2024-01-012024-03-310000007789us-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ServicingContractsMember2024-01-012024-03-310000007789asb:AppraisalsDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Membersrt:MinimumMemberasb:ImpairedFinanceReceivableMember2024-01-012024-03-310000007789asb:AppraisalsDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberasb:ImpairedFinanceReceivableMember2024-01-012024-03-310000007789asb:AppraisalsDiscountedCashFlowMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberasb:ImpairedFinanceReceivableMember2024-01-012024-03-310000007789us-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateLockCommitmentsMembersrt:MinimumMember2024-01-012024-03-310000007789us-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateLockCommitmentsMembersrt:MaximumMember2024-01-012024-03-310000007789us-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateLockCommitmentsMember2024-01-012024-03-310000007789us-gaap:PensionPlansDefinedBenefitMember2024-01-012024-03-310000007789us-gaap:PensionPlansDefinedBenefitMember2023-01-012023-03-310000007789us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2024-01-012024-03-310000007789us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2023-01-012023-03-310000007789us-gaap:PensionPlansDefinedBenefitMember2023-01-012023-12-31asb:segment0000007789us-gaap:OperatingSegmentsMemberasb:CorporateandCommercialSpecialtysegmentMember2024-01-012024-03-310000007789us-gaap:OperatingSegmentsMemberasb:CorporateandCommercialSpecialtysegmentMember2023-01-012023-03-310000007789us-gaap:OperatingSegmentsMemberasb:CommunityConsumerandBusinesssegmentMember2024-01-012024-03-310000007789us-gaap:OperatingSegmentsMemberasb:CommunityConsumerandBusinesssegmentMember2023-01-012023-03-310000007789us-gaap:OperatingSegmentsMemberasb:RiskManagementandSharedSeriviesSegmentMember2024-01-012024-03-310000007789us-gaap:OperatingSegmentsMemberasb:RiskManagementandSharedSeriviesSegmentMember2023-01-012023-03-310000007789us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-12-310000007789us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-12-310000007789us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2023-12-310000007789us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2024-01-012024-03-310000007789us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2024-01-012024-03-310000007789us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2024-01-012024-03-310000007789us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2024-03-310000007789us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2024-03-310000007789us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2024-03-310000007789us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-12-310000007789us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-12-310000007789us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-12-310000007789us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-01-012023-03-310000007789us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-01-012023-03-310000007789us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2023-01-012023-03-310000007789us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-03-310000007789us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-03-310000007789us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2023-03-310000007789srt:MinimumMember2024-03-310000007789srt:MaximumMember2024-03-310000007789asb:RetailandCorporateOfficesMember2024-03-310000007789asb:RetailandCorporateOfficesMember2023-12-310000007789us-gaap:LandMember2024-03-310000007789us-gaap:LandMember2023-12-310000007789us-gaap:EquipmentMember2024-03-310000007789us-gaap:EquipmentMember2023-12-31