10-Q 1 inbk-20240930.htm 10-Q inbk-20240930
000156246312/31falseQ32024http://fasb.org/us-gaap/2024#AccountingStandardsUpdate201613Memberxbrli:sharesiso4217:USDiso4217:USDxbrli:sharesinbk:subsidiaryxbrli:pureinbk:securityinbk:loaninbk:propertyinbk:derivative00015624632024-01-012024-09-300001562463us-gaap:CommonStockMember2024-01-012024-09-300001562463inbk:A60FixedToFloatingSubordinatedNotesDue2029Member2024-01-012024-09-3000015624632024-11-0100015624632024-09-3000015624632023-12-310001562463inbk:VotingCommonStockMember2023-12-310001562463inbk:VotingCommonStockMember2024-09-300001562463us-gaap:NonvotingCommonStockMember2024-09-300001562463us-gaap:NonvotingCommonStockMember2023-12-3100015624632024-07-012024-09-3000015624632023-07-012023-09-3000015624632023-01-012023-09-300001562463us-gaap:BankServicingMember2024-07-012024-09-300001562463us-gaap:BankServicingMember2023-07-012023-09-300001562463us-gaap:BankServicingMember2024-01-012024-09-300001562463us-gaap:BankServicingMember2023-01-012023-09-300001562463inbk:LoanServicingMember2024-07-012024-09-300001562463inbk:LoanServicingMember2023-07-012023-09-300001562463inbk:LoanServicingMember2024-01-012024-09-300001562463inbk:LoanServicingMember2023-01-012023-09-300001562463inbk:LoanServicingAssetRevaluationMember2024-07-012024-09-300001562463inbk:LoanServicingAssetRevaluationMember2023-07-012023-09-300001562463inbk:LoanServicingAssetRevaluationMember2024-01-012024-09-300001562463inbk:LoanServicingAssetRevaluationMember2023-01-012023-09-300001562463us-gaap:MortgageBankingMember2024-07-012024-09-300001562463us-gaap:MortgageBankingMember2023-07-012023-09-300001562463us-gaap:MortgageBankingMember2024-01-012024-09-300001562463us-gaap:MortgageBankingMember2023-01-012023-09-300001562463us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2024-07-012024-09-300001562463us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-07-012023-09-300001562463us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2024-01-012024-09-300001562463us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-01-012023-09-300001562463us-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2023-12-310001562463us-gaap:RetainedEarningsMember2023-12-310001562463us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-12-310001562463us-gaap:RetainedEarningsMember2024-01-012024-09-300001562463us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-01-012024-09-300001562463us-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2024-01-012024-09-300001562463us-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2024-09-300001562463us-gaap:RetainedEarningsMember2024-09-300001562463us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-09-300001562463us-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2022-12-310001562463us-gaap:RetainedEarningsMember2022-12-310001562463us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-12-3100015624632022-12-3100015624632022-01-012022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:RetainedEarningsMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2022-12-310001562463us-gaap:RetainedEarningsMember2023-01-012023-09-300001562463us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-01-012023-09-300001562463us-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2023-01-012023-09-300001562463us-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2023-09-300001562463us-gaap:RetainedEarningsMember2023-09-300001562463us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-09-3000015624632023-09-300001562463us-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2024-06-300001562463us-gaap:RetainedEarningsMember2024-06-300001562463us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-06-3000015624632024-06-300001562463us-gaap:RetainedEarningsMember2024-07-012024-09-300001562463us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-07-012024-09-300001562463us-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2024-07-012024-09-300001562463us-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2023-06-300001562463us-gaap:RetainedEarningsMember2023-06-300001562463us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-06-3000015624632023-06-300001562463us-gaap:RetainedEarningsMember2023-07-012023-09-300001562463us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-07-012023-09-300001562463us-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2023-07-012023-09-300001562463inbk:VotingAndNonVotingCommonStockMember2023-07-012023-09-300001562463us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2024-09-300001562463us-gaap:MunicipalBondsMember2024-09-300001562463us-gaap:ResidentialMortgageBackedSecuritiesMember2024-09-300001562463us-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2024-09-300001562463us-gaap:AssetBackedSecuritiesMember2024-09-300001562463us-gaap:CorporateDebtSecuritiesMember2024-09-300001562463us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2023-12-310001562463us-gaap:MunicipalBondsMember2023-12-310001562463us-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463us-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2023-12-310001562463us-gaap:AssetBackedSecuritiesMember2023-12-310001562463us-gaap:CorporateDebtSecuritiesMember2023-12-310001562463us-gaap:CollateralizedSecuritiesMember2024-09-300001562463us-gaap:CollateralizedSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel2Memberus-gaap:AssetBackedSecuritiesMember2024-09-300001562463srt:MoodysAaaRatingMembersrt:StandardPoorsAAARatingMemberus-gaap:MunicipalBondsMember2024-09-300001562463srt:MoodysAaaRatingMembersrt:StandardPoorsAAARatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysAaaRatingMembersrt:StandardPoorsAAARatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysAaaRatingMembersrt:StandardPoorsAAARatingMemberus-gaap:OtherDebtSecuritiesMember2024-09-300001562463srt:StandardPoorsAAARatingMembersrt:MoodysAaaRatingMember2024-09-300001562463srt:MoodysAa1RatingMembersrt:StandardPoorsAAPlusRatingMemberus-gaap:MunicipalBondsMember2024-09-300001562463srt:MoodysAa1RatingMembersrt:StandardPoorsAAPlusRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysAa1RatingMembersrt:StandardPoorsAAPlusRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysAa1RatingMembersrt:StandardPoorsAAPlusRatingMemberus-gaap:OtherDebtSecuritiesMember2024-09-300001562463srt:StandardPoorsAAPlusRatingMembersrt:MoodysAa1RatingMember2024-09-300001562463srt:MoodysAa2RatingMembersrt:StandardPoorsAARatingMemberus-gaap:MunicipalBondsMember2024-09-300001562463srt:MoodysAa2RatingMembersrt:StandardPoorsAARatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysAa2RatingMembersrt:StandardPoorsAARatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysAa2RatingMembersrt:StandardPoorsAARatingMemberus-gaap:OtherDebtSecuritiesMember2024-09-300001562463srt:StandardPoorsAARatingMembersrt:MoodysAa2RatingMember2024-09-300001562463srt:MoodysAa3RatingMembersrt:StandardPoorsAAMinusRatingMemberus-gaap:MunicipalBondsMember2024-09-300001562463srt:MoodysAa3RatingMembersrt:StandardPoorsAAMinusRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysAa3RatingMembersrt:StandardPoorsAAMinusRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysAa3RatingMembersrt:StandardPoorsAAMinusRatingMemberus-gaap:OtherDebtSecuritiesMember2024-09-300001562463srt:StandardPoorsAAMinusRatingMembersrt:MoodysAa3RatingMember2024-09-300001562463srt:MoodysA2RatingMembersrt:StandardPoorsARatingMemberus-gaap:MunicipalBondsMember2024-09-300001562463srt:MoodysA2RatingMembersrt:StandardPoorsARatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysA2RatingMembersrt:StandardPoorsARatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysA2RatingMembersrt:StandardPoorsARatingMemberus-gaap:OtherDebtSecuritiesMember2024-09-300001562463srt:StandardPoorsARatingMembersrt:MoodysA2RatingMember2024-09-300001562463srt:MoodysA3RatingMembersrt:StandardPoorsAMinusRatingMemberus-gaap:MunicipalBondsMember2024-09-300001562463srt:MoodysA3RatingMembersrt:StandardPoorsAMinusRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysA3RatingMembersrt:StandardPoorsAMinusRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysA3RatingMembersrt:StandardPoorsAMinusRatingMemberus-gaap:OtherDebtSecuritiesMember2024-09-300001562463srt:StandardPoorsAMinusRatingMembersrt:MoodysA3RatingMember2024-09-300001562463srt:MoodysBaa1RatingMembersrt:StandardPoorsBBBPlusRatingMemberus-gaap:MunicipalBondsMember2024-09-300001562463srt:MoodysBaa1RatingMembersrt:StandardPoorsBBBPlusRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysBaa1RatingMembersrt:StandardPoorsBBBPlusRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysBaa1RatingMembersrt:StandardPoorsBBBPlusRatingMemberus-gaap:OtherDebtSecuritiesMember2024-09-300001562463srt:StandardPoorsBBBPlusRatingMembersrt:MoodysBaa1RatingMember2024-09-300001562463srt:MoodysBaa2RatingMembersrt:StandardPoorsBBBRatingMemberus-gaap:MunicipalBondsMember2024-09-300001562463srt:MoodysBaa2RatingMembersrt:StandardPoorsBBBRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysBaa2RatingMembersrt:StandardPoorsBBBRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysBaa2RatingMembersrt:StandardPoorsBBBRatingMemberus-gaap:OtherDebtSecuritiesMember2024-09-300001562463srt:StandardPoorsBBBRatingMembersrt:MoodysBaa2RatingMember2024-09-300001562463srt:MoodysBaa3RatingMembersrt:StandardPoorsBBBMinusRatingMemberus-gaap:MunicipalBondsMember2024-09-300001562463srt:MoodysBaa3RatingMembersrt:StandardPoorsBBBMinusRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysBaa3RatingMembersrt:StandardPoorsBBBMinusRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysBaa3RatingMembersrt:StandardPoorsBBBMinusRatingMemberus-gaap:OtherDebtSecuritiesMember2024-09-300001562463srt:StandardPoorsBBBMinusRatingMembersrt:MoodysBaa3RatingMember2024-09-300001562463srt:MoodysBa1RatingMembersrt:StandardPoorsBBPlusRatingMemberus-gaap:MunicipalBondsMember2024-09-300001562463srt:MoodysBa1RatingMembersrt:StandardPoorsBBPlusRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysBa1RatingMembersrt:StandardPoorsBBPlusRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463srt:MoodysBa1RatingMembersrt:StandardPoorsBBPlusRatingMemberus-gaap:OtherDebtSecuritiesMember2024-09-300001562463srt:StandardPoorsBBPlusRatingMembersrt:MoodysBa1RatingMember2024-09-300001562463us-gaap:OtherDebtSecuritiesMember2024-09-300001562463srt:MoodysAaaRatingMembersrt:StandardPoorsAAARatingMemberus-gaap:MunicipalBondsMember2023-12-310001562463srt:MoodysAaaRatingMembersrt:StandardPoorsAAARatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysAaaRatingMembersrt:StandardPoorsAAARatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysAaaRatingMembersrt:StandardPoorsAAARatingMemberus-gaap:OtherDebtSecuritiesMember2023-12-310001562463srt:StandardPoorsAAARatingMembersrt:MoodysAaaRatingMember2023-12-310001562463srt:MoodysAa1RatingMembersrt:StandardPoorsAAPlusRatingMemberus-gaap:MunicipalBondsMember2023-12-310001562463srt:MoodysAa1RatingMembersrt:StandardPoorsAAPlusRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysAa1RatingMembersrt:StandardPoorsAAPlusRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysAa1RatingMembersrt:StandardPoorsAAPlusRatingMemberus-gaap:OtherDebtSecuritiesMember2023-12-310001562463srt:StandardPoorsAAPlusRatingMembersrt:MoodysAa1RatingMember2023-12-310001562463srt:MoodysAa2RatingMembersrt:StandardPoorsAARatingMemberus-gaap:MunicipalBondsMember2023-12-310001562463srt:MoodysAa2RatingMembersrt:StandardPoorsAARatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysAa2RatingMembersrt:StandardPoorsAARatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysAa2RatingMembersrt:StandardPoorsAARatingMemberus-gaap:OtherDebtSecuritiesMember2023-12-310001562463srt:StandardPoorsAARatingMembersrt:MoodysAa2RatingMember2023-12-310001562463srt:MoodysA1RatingMembersrt:StandardPoorsAPlusRatingMemberus-gaap:MunicipalBondsMember2023-12-310001562463srt:MoodysA1RatingMembersrt:StandardPoorsAPlusRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysA1RatingMembersrt:StandardPoorsAPlusRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysA1RatingMembersrt:StandardPoorsAPlusRatingMemberus-gaap:OtherDebtSecuritiesMember2023-12-310001562463srt:StandardPoorsAPlusRatingMembersrt:MoodysA1RatingMember2023-12-310001562463srt:MoodysA2RatingMembersrt:StandardPoorsARatingMemberus-gaap:MunicipalBondsMember2023-12-310001562463srt:MoodysA2RatingMembersrt:StandardPoorsARatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysA2RatingMembersrt:StandardPoorsARatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysA2RatingMembersrt:StandardPoorsARatingMemberus-gaap:OtherDebtSecuritiesMember2023-12-310001562463srt:StandardPoorsARatingMembersrt:MoodysA2RatingMember2023-12-310001562463srt:MoodysA3RatingMembersrt:StandardPoorsAMinusRatingMemberus-gaap:MunicipalBondsMember2023-12-310001562463srt:MoodysA3RatingMembersrt:StandardPoorsAMinusRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysA3RatingMembersrt:StandardPoorsAMinusRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysA3RatingMembersrt:StandardPoorsAMinusRatingMemberus-gaap:OtherDebtSecuritiesMember2023-12-310001562463srt:StandardPoorsAMinusRatingMembersrt:MoodysA3RatingMember2023-12-310001562463srt:MoodysBaa1RatingMembersrt:StandardPoorsBBBPlusRatingMemberus-gaap:MunicipalBondsMember2023-12-310001562463srt:MoodysBaa1RatingMembersrt:StandardPoorsBBBPlusRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysBaa1RatingMembersrt:StandardPoorsBBBPlusRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysBaa1RatingMembersrt:StandardPoorsBBBPlusRatingMemberus-gaap:OtherDebtSecuritiesMember2023-12-310001562463srt:StandardPoorsBBBPlusRatingMembersrt:MoodysBaa1RatingMember2023-12-310001562463srt:MoodysBaa2RatingMembersrt:StandardPoorsBBBRatingMemberus-gaap:MunicipalBondsMember2023-12-310001562463srt:MoodysBaa2RatingMembersrt:StandardPoorsBBBRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysBaa2RatingMembersrt:StandardPoorsBBBRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysBaa2RatingMembersrt:StandardPoorsBBBRatingMemberus-gaap:OtherDebtSecuritiesMember2023-12-310001562463srt:StandardPoorsBBBRatingMembersrt:MoodysBaa2RatingMember2023-12-310001562463srt:MoodysBaa3RatingMembersrt:StandardPoorsBBBMinusRatingMemberus-gaap:MunicipalBondsMember2023-12-310001562463srt:MoodysBaa3RatingMembersrt:StandardPoorsBBBMinusRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysBaa3RatingMembersrt:StandardPoorsBBBMinusRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysBaa3RatingMembersrt:StandardPoorsBBBMinusRatingMemberus-gaap:OtherDebtSecuritiesMember2023-12-310001562463srt:StandardPoorsBBBMinusRatingMembersrt:MoodysBaa3RatingMember2023-12-310001562463srt:MoodysBa1RatingMembersrt:StandardPoorsBBPlusRatingMemberus-gaap:MunicipalBondsMember2023-12-310001562463srt:MoodysBa1RatingMembersrt:StandardPoorsBBPlusRatingMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysBa1RatingMembersrt:StandardPoorsBBPlusRatingMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463srt:MoodysBa1RatingMembersrt:StandardPoorsBBPlusRatingMemberus-gaap:OtherDebtSecuritiesMember2023-12-310001562463srt:StandardPoorsBBPlusRatingMembersrt:MoodysBa1RatingMember2023-12-310001562463us-gaap:OtherDebtSecuritiesMember2023-12-310001562463us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-09-300001562463us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001562463inbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001562463us-gaap:RealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-09-300001562463us-gaap:RealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001562463us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2024-09-300001562463us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001562463inbk:SingleTenantLeaseMemberus-gaap:CommercialPortfolioSegmentMember2024-09-300001562463inbk:SingleTenantLeaseMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001562463inbk:PublicFinanceMemberus-gaap:CommercialPortfolioSegmentMember2024-09-300001562463inbk:PublicFinanceMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001562463inbk:HealthcareFinanceMemberus-gaap:CommercialPortfolioSegmentMember2024-09-300001562463inbk:HealthcareFinanceMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001562463inbk:SmallBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2024-09-300001562463inbk:SmallBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001562463inbk:FranchiseFinanceMemberus-gaap:CommercialPortfolioSegmentMember2024-09-300001562463inbk:FranchiseFinanceMemberus-gaap:CommercialPortfolioSegmentMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMember2023-12-310001562463us-gaap:ResidentialMortgageMemberus-gaap:ConsumerPortfolioSegmentMember2024-09-300001562463us-gaap:ResidentialMortgageMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001562463us-gaap:HomeEquityLoanMemberus-gaap:ConsumerPortfolioSegmentMember2024-09-300001562463us-gaap:HomeEquityLoanMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001562463inbk:OtherConsumerLoansMemberus-gaap:ConsumerPortfolioSegmentMember2024-09-300001562463inbk:OtherConsumerLoansMemberus-gaap:ConsumerPortfolioSegmentMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMember2023-12-310001562463us-gaap:InterestRateSwapMemberus-gaap:CommercialPortfolioSegmentMemberinbk:PublicFinanceMember2024-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:CommercialPortfolioSegmentMemberinbk:PublicFinanceMember2023-12-310001562463us-gaap:CommercialRealEstateMember2024-06-300001562463us-gaap:CommercialRealEstateMember2024-07-012024-09-300001562463us-gaap:CommercialRealEstateMember2024-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMember2024-06-300001562463inbk:OwnerOccupiedCommercialRealEstateMember2024-07-012024-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMember2024-09-300001562463us-gaap:RealEstateMember2024-06-300001562463us-gaap:RealEstateMember2024-07-012024-09-300001562463us-gaap:RealEstateMember2024-09-300001562463us-gaap:ConstructionLoansMember2024-06-300001562463us-gaap:ConstructionLoansMember2024-07-012024-09-300001562463us-gaap:ConstructionLoansMember2024-09-300001562463inbk:SingleTenantLeaseMember2024-06-300001562463inbk:SingleTenantLeaseMember2024-07-012024-09-300001562463inbk:SingleTenantLeaseMember2024-09-300001562463inbk:PublicFinanceMember2024-06-300001562463inbk:PublicFinanceMember2024-07-012024-09-300001562463inbk:PublicFinanceMember2024-09-300001562463inbk:HealthcareFinanceMember2024-06-300001562463inbk:HealthcareFinanceMember2024-07-012024-09-300001562463inbk:HealthcareFinanceMember2024-09-300001562463inbk:SmallBusinessLendingMember2024-06-300001562463inbk:SmallBusinessLendingMember2024-07-012024-09-300001562463inbk:SmallBusinessLendingMember2024-09-300001562463inbk:FranchiseFinanceMember2024-06-300001562463inbk:FranchiseFinanceMember2024-07-012024-09-300001562463inbk:FranchiseFinanceMember2024-09-300001562463us-gaap:ResidentialMortgageMember2024-06-300001562463us-gaap:ResidentialMortgageMember2024-07-012024-09-300001562463us-gaap:ResidentialMortgageMember2024-09-300001562463us-gaap:HomeEquityLoanMember2024-06-300001562463us-gaap:HomeEquityLoanMember2024-07-012024-09-300001562463us-gaap:HomeEquityLoanMember2024-09-300001562463inbk:OtherConsumerLoansMember2024-06-300001562463inbk:OtherConsumerLoansMember2024-07-012024-09-300001562463inbk:OtherConsumerLoansMember2024-09-300001562463us-gaap:CommercialRealEstateMember2023-12-310001562463us-gaap:CommercialRealEstateMember2024-01-012024-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMember2023-12-310001562463inbk:OwnerOccupiedCommercialRealEstateMember2024-01-012024-09-300001562463us-gaap:RealEstateMember2023-12-310001562463us-gaap:RealEstateMember2024-01-012024-09-300001562463us-gaap:ConstructionLoansMember2023-12-310001562463us-gaap:ConstructionLoansMember2024-01-012024-09-300001562463inbk:SingleTenantLeaseMember2023-12-310001562463inbk:SingleTenantLeaseMember2024-01-012024-09-300001562463inbk:PublicFinanceMember2023-12-310001562463inbk:PublicFinanceMember2024-01-012024-09-300001562463inbk:HealthcareFinanceMember2023-12-310001562463inbk:HealthcareFinanceMember2024-01-012024-09-300001562463inbk:SmallBusinessLendingMember2023-12-310001562463inbk:SmallBusinessLendingMember2024-01-012024-09-300001562463inbk:FranchiseFinanceMember2023-12-310001562463inbk:FranchiseFinanceMember2024-01-012024-09-300001562463us-gaap:ResidentialMortgageMember2023-12-310001562463us-gaap:ResidentialMortgageMember2024-01-012024-09-300001562463us-gaap:HomeEquityLoanMember2023-12-310001562463us-gaap:HomeEquityLoanMember2024-01-012024-09-300001562463inbk:OtherConsumerLoansMember2023-12-310001562463inbk:OtherConsumerLoansMember2024-01-012024-09-300001562463us-gaap:CommercialRealEstateMember2023-06-300001562463us-gaap:CommercialRealEstateMember2023-07-012023-09-300001562463us-gaap:CommercialRealEstateMember2023-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMember2023-06-300001562463inbk:OwnerOccupiedCommercialRealEstateMember2023-07-012023-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMember2023-09-300001562463us-gaap:RealEstateMember2023-06-300001562463us-gaap:RealEstateMember2023-07-012023-09-300001562463us-gaap:RealEstateMember2023-09-300001562463us-gaap:ConstructionLoansMember2023-06-300001562463us-gaap:ConstructionLoansMember2023-07-012023-09-300001562463us-gaap:ConstructionLoansMember2023-09-300001562463inbk:SingleTenantLeaseMember2023-06-300001562463inbk:SingleTenantLeaseMember2023-07-012023-09-300001562463inbk:SingleTenantLeaseMember2023-09-300001562463inbk:PublicFinanceMember2023-06-300001562463inbk:PublicFinanceMember2023-07-012023-09-300001562463inbk:PublicFinanceMember2023-09-300001562463inbk:HealthcareFinanceMember2023-06-300001562463inbk:HealthcareFinanceMember2023-07-012023-09-300001562463inbk:HealthcareFinanceMember2023-09-300001562463inbk:SmallBusinessLendingMember2023-06-300001562463inbk:SmallBusinessLendingMember2023-07-012023-09-300001562463inbk:SmallBusinessLendingMember2023-09-300001562463inbk:FranchiseFinanceMember2023-06-300001562463inbk:FranchiseFinanceMember2023-07-012023-09-300001562463inbk:FranchiseFinanceMember2023-09-300001562463us-gaap:ResidentialMortgageMember2023-06-300001562463us-gaap:ResidentialMortgageMember2023-07-012023-09-300001562463us-gaap:ResidentialMortgageMember2023-09-300001562463us-gaap:HomeEquityLoanMember2023-06-300001562463us-gaap:HomeEquityLoanMember2023-07-012023-09-300001562463us-gaap:HomeEquityLoanMember2023-09-300001562463inbk:OtherConsumerLoansMember2023-06-300001562463inbk:OtherConsumerLoansMember2023-07-012023-09-300001562463inbk:OtherConsumerLoansMember2023-09-300001562463us-gaap:CommercialRealEstateMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialRealEstateMember2022-12-310001562463us-gaap:CommercialRealEstateMember2023-01-012023-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberinbk:OwnerOccupiedCommercialRealEstateMember2022-12-310001562463inbk:OwnerOccupiedCommercialRealEstateMember2023-01-012023-09-300001562463us-gaap:RealEstateMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:RealEstateMember2022-12-310001562463us-gaap:RealEstateMember2023-01-012023-09-300001562463us-gaap:ConstructionLoansMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ConstructionLoansMember2022-12-310001562463us-gaap:ConstructionLoansMember2023-01-012023-09-300001562463inbk:SingleTenantLeaseMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberinbk:SingleTenantLeaseMember2022-12-310001562463inbk:SingleTenantLeaseMember2023-01-012023-09-300001562463inbk:PublicFinanceMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberinbk:PublicFinanceMember2022-12-310001562463inbk:PublicFinanceMember2023-01-012023-09-300001562463inbk:HealthcareFinanceMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberinbk:HealthcareFinanceMember2022-12-310001562463inbk:HealthcareFinanceMember2023-01-012023-09-300001562463inbk:SmallBusinessLendingMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberinbk:SmallBusinessLendingMember2022-12-310001562463inbk:SmallBusinessLendingMember2023-01-012023-09-300001562463inbk:FranchiseFinanceMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberinbk:FranchiseFinanceMember2022-12-310001562463inbk:FranchiseFinanceMember2023-01-012023-09-300001562463us-gaap:ResidentialMortgageMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ResidentialMortgageMember2022-12-310001562463us-gaap:ResidentialMortgageMember2023-01-012023-09-300001562463us-gaap:HomeEquityLoanMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:HomeEquityLoanMember2022-12-310001562463us-gaap:HomeEquityLoanMember2023-01-012023-09-300001562463inbk:OtherConsumerLoansMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberinbk:OtherConsumerLoansMember2022-12-310001562463inbk:OtherConsumerLoansMember2023-01-012023-09-300001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2023-01-010001562463us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-06-300001562463us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-07-012024-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-06-300001562463inbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-07-012024-09-300001562463us-gaap:RealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-06-300001562463us-gaap:RealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-07-012024-09-300001562463us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2024-06-300001562463us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2024-07-012024-09-300001562463inbk:SingleTenantLeaseMemberus-gaap:CommercialPortfolioSegmentMember2024-06-300001562463inbk:SingleTenantLeaseMemberus-gaap:CommercialPortfolioSegmentMember2024-07-012024-09-300001562463inbk:SmallBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2024-06-300001562463inbk:SmallBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2024-07-012024-09-300001562463us-gaap:CommercialPortfolioSegmentMember2024-06-300001562463us-gaap:CommercialPortfolioSegmentMember2024-07-012024-09-300001562463us-gaap:ResidentialMortgageMemberus-gaap:ConsumerPortfolioSegmentMember2024-06-300001562463us-gaap:ResidentialMortgageMemberus-gaap:ConsumerPortfolioSegmentMember2024-07-012024-09-300001562463us-gaap:HomeEquityLoanMemberus-gaap:ConsumerPortfolioSegmentMember2024-06-300001562463us-gaap:HomeEquityLoanMemberus-gaap:ConsumerPortfolioSegmentMember2024-07-012024-09-300001562463inbk:OtherConsumerLoansMemberus-gaap:ConsumerPortfolioSegmentMember2024-06-300001562463inbk:OtherConsumerLoansMemberus-gaap:ConsumerPortfolioSegmentMember2024-07-012024-09-300001562463us-gaap:ConsumerPortfolioSegmentMember2024-06-300001562463us-gaap:ConsumerPortfolioSegmentMember2024-07-012024-09-300001562463us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-09-300001562463us-gaap:RealEstateMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-09-300001562463us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-09-300001562463inbk:SingleTenantLeaseMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-09-300001562463inbk:SmallBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-09-300001562463us-gaap:CommercialPortfolioSegmentMember2024-01-012024-09-300001562463us-gaap:ResidentialMortgageMemberus-gaap:ConsumerPortfolioSegmentMember2024-01-012024-09-300001562463us-gaap:HomeEquityLoanMemberus-gaap:ConsumerPortfolioSegmentMember2024-01-012024-09-300001562463inbk:OtherConsumerLoansMemberus-gaap:ConsumerPortfolioSegmentMember2024-01-012024-09-300001562463us-gaap:ConsumerPortfolioSegmentMember2024-01-012024-09-300001562463us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001562463us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-07-012023-09-300001562463us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001562463inbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-07-012023-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-09-300001562463us-gaap:RealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001562463us-gaap:RealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-07-012023-09-300001562463us-gaap:RealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-09-300001562463us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001562463us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2023-07-012023-09-300001562463us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2023-09-300001562463inbk:SmallBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2023-06-300001562463inbk:SmallBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2023-07-012023-09-300001562463inbk:SmallBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2023-09-300001562463us-gaap:CommercialPortfolioSegmentMember2023-06-300001562463us-gaap:CommercialPortfolioSegmentMember2023-07-012023-09-300001562463us-gaap:CommercialPortfolioSegmentMember2023-09-300001562463us-gaap:ResidentialMortgageMemberus-gaap:ConsumerPortfolioSegmentMember2023-06-300001562463us-gaap:ResidentialMortgageMemberus-gaap:ConsumerPortfolioSegmentMember2023-07-012023-09-300001562463us-gaap:ResidentialMortgageMemberus-gaap:ConsumerPortfolioSegmentMember2023-09-300001562463us-gaap:HomeEquityLoanMemberus-gaap:ConsumerPortfolioSegmentMember2023-06-300001562463us-gaap:HomeEquityLoanMemberus-gaap:ConsumerPortfolioSegmentMember2023-07-012023-09-300001562463us-gaap:HomeEquityLoanMemberus-gaap:ConsumerPortfolioSegmentMember2023-09-300001562463inbk:OtherConsumerLoansMemberus-gaap:ConsumerPortfolioSegmentMember2023-06-300001562463inbk:OtherConsumerLoansMemberus-gaap:ConsumerPortfolioSegmentMember2023-07-012023-09-300001562463inbk:OtherConsumerLoansMemberus-gaap:ConsumerPortfolioSegmentMember2023-09-300001562463us-gaap:ConsumerPortfolioSegmentMember2023-06-300001562463us-gaap:ConsumerPortfolioSegmentMember2023-07-012023-09-300001562463us-gaap:ConsumerPortfolioSegmentMember2023-09-300001562463us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2022-12-310001562463us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialPortfolioSegmentMemberinbk:OwnerOccupiedCommercialRealEstateMember2022-12-310001562463inbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-09-300001562463us-gaap:RealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMember2022-12-310001562463us-gaap:RealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-09-300001562463us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMember2022-12-310001562463us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-09-300001562463inbk:HealthcareFinanceMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialPortfolioSegmentMemberinbk:HealthcareFinanceMember2022-12-310001562463inbk:HealthcareFinanceMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-09-300001562463inbk:HealthcareFinanceMemberus-gaap:CommercialPortfolioSegmentMember2023-09-300001562463inbk:SmallBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialPortfolioSegmentMemberinbk:SmallBusinessLendingMember2022-12-310001562463inbk:SmallBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-09-300001562463us-gaap:CommercialPortfolioSegmentMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialPortfolioSegmentMember2022-12-310001562463us-gaap:CommercialPortfolioSegmentMember2023-01-012023-09-300001562463us-gaap:ResidentialMortgageMemberus-gaap:ConsumerPortfolioSegmentMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2022-12-310001562463us-gaap:ResidentialMortgageMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-09-300001562463us-gaap:HomeEquityLoanMemberus-gaap:ConsumerPortfolioSegmentMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityLoanMember2022-12-310001562463us-gaap:HomeEquityLoanMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-09-300001562463inbk:OtherConsumerLoansMemberus-gaap:ConsumerPortfolioSegmentMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ConsumerPortfolioSegmentMemberinbk:OtherConsumerLoansMember2022-12-310001562463inbk:OtherConsumerLoansMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-09-300001562463us-gaap:ConsumerPortfolioSegmentMember2022-12-310001562463srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ConsumerPortfolioSegmentMember2022-12-310001562463us-gaap:ConsumerPortfolioSegmentMember2023-01-012023-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:CommercialRealEstateMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberus-gaap:CommercialRealEstateMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:CommercialRealEstateMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberus-gaap:CommercialRealEstateMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberinbk:OwnerOccupiedCommercialRealEstateMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberinbk:OwnerOccupiedCommercialRealEstateMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberinbk:OwnerOccupiedCommercialRealEstateMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberinbk:OwnerOccupiedCommercialRealEstateMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:RealEstateMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberus-gaap:RealEstateMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:RealEstateMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberus-gaap:RealEstateMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:ConstructionLoansMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberus-gaap:ConstructionLoansMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:ConstructionLoansMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberus-gaap:ConstructionLoansMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberinbk:SingleTenantLeaseMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberinbk:SingleTenantLeaseMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberinbk:SingleTenantLeaseMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberinbk:SingleTenantLeaseMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberinbk:PublicFinanceMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberinbk:PublicFinanceMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberinbk:PublicFinanceMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberinbk:PublicFinanceMember2024-09-300001562463inbk:PublicFinanceMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberinbk:HealthcareFinanceMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberinbk:HealthcareFinanceMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberinbk:HealthcareFinanceMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberinbk:HealthcareFinanceMember2024-09-300001562463inbk:HealthcareFinanceMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberinbk:SmallBusinessLendingMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberinbk:SmallBusinessLendingMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberinbk:SmallBusinessLendingMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberinbk:SmallBusinessLendingMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberinbk:FranchiseFinanceMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberinbk:FranchiseFinanceMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberinbk:FranchiseFinanceMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberinbk:FranchiseFinanceMember2024-09-300001562463inbk:FranchiseFinanceMemberus-gaap:CommercialPortfolioSegmentMember2024-01-012024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberus-gaap:ResidentialMortgageMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberus-gaap:ResidentialMortgageMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberus-gaap:HomeEquityLoanMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberus-gaap:HomeEquityLoanMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberinbk:OtherConsumerLoansMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberinbk:OtherConsumerLoansMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:CommercialRealEstateMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberus-gaap:CommercialRealEstateMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:CommercialRealEstateMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberus-gaap:CommercialRealEstateMember2023-12-310001562463us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberinbk:OwnerOccupiedCommercialRealEstateMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberinbk:OwnerOccupiedCommercialRealEstateMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberinbk:OwnerOccupiedCommercialRealEstateMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberinbk:OwnerOccupiedCommercialRealEstateMember2023-12-310001562463inbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:RealEstateMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberus-gaap:RealEstateMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:RealEstateMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberus-gaap:RealEstateMember2023-12-310001562463us-gaap:RealEstateMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:ConstructionLoansMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberus-gaap:ConstructionLoansMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:ConstructionLoansMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberus-gaap:ConstructionLoansMember2023-12-310001562463us-gaap:ConstructionLoansMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberinbk:SingleTenantLeaseMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberinbk:SingleTenantLeaseMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberinbk:SingleTenantLeaseMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberinbk:SingleTenantLeaseMember2023-12-310001562463inbk:SingleTenantLeaseMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberinbk:PublicFinanceMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberinbk:PublicFinanceMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberinbk:PublicFinanceMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberinbk:PublicFinanceMember2023-12-310001562463inbk:PublicFinanceMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberinbk:HealthcareFinanceMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberinbk:HealthcareFinanceMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberinbk:HealthcareFinanceMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberinbk:HealthcareFinanceMember2023-12-310001562463inbk:HealthcareFinanceMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberinbk:SmallBusinessLendingMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberinbk:SmallBusinessLendingMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberinbk:SmallBusinessLendingMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberinbk:SmallBusinessLendingMember2023-12-310001562463inbk:SmallBusinessLendingMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberinbk:FranchiseFinanceMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberinbk:FranchiseFinanceMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberinbk:FranchiseFinanceMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberinbk:FranchiseFinanceMember2023-12-310001562463inbk:FranchiseFinanceMemberus-gaap:CommercialPortfolioSegmentMember2023-01-012023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberus-gaap:ResidentialMortgageMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberus-gaap:ResidentialMortgageMember2023-12-310001562463us-gaap:ResidentialMortgageMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberus-gaap:HomeEquityLoanMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberus-gaap:HomeEquityLoanMember2023-12-310001562463us-gaap:HomeEquityLoanMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberinbk:OtherConsumerLoansMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberinbk:OtherConsumerLoansMember2023-12-310001562463inbk:OtherConsumerLoansMemberus-gaap:ConsumerPortfolioSegmentMember2023-01-012023-12-3100015624632023-01-012023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancialAssetPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:FinancialAssetPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberus-gaap:FinancialAssetPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancialAssetPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SingleTenantLeaseMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SingleTenantLeaseMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SingleTenantLeaseMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SingleTenantLeaseMemberus-gaap:FinancialAssetPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SingleTenantLeaseMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:PublicFinanceMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:PublicFinanceMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:PublicFinanceMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:PublicFinanceMemberus-gaap:FinancialAssetPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:PublicFinanceMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:HealthcareFinanceMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:HealthcareFinanceMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:HealthcareFinanceMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:HealthcareFinanceMemberus-gaap:FinancialAssetPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:HealthcareFinanceMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SmallBusinessLendingMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SmallBusinessLendingMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SmallBusinessLendingMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SmallBusinessLendingMemberus-gaap:FinancialAssetPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SmallBusinessLendingMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:FranchiseFinanceMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:FranchiseFinanceMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:FranchiseFinanceMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:FranchiseFinanceMemberus-gaap:FinancialAssetPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberinbk:FranchiseFinanceMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityLoanMemberus-gaap:FinancialAssetPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityLoanMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberinbk:OtherConsumerLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberinbk:OtherConsumerLoansMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberinbk:OtherConsumerLoansMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberinbk:OtherConsumerLoansMemberus-gaap:FinancialAssetPastDueMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberinbk:OtherConsumerLoansMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463us-gaap:FinancingReceivables30To59DaysPastDueMember2024-09-300001562463us-gaap:FinancingReceivables60To89DaysPastDueMember2024-09-300001562463us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463us-gaap:FinancialAssetPastDueMember2024-09-300001562463us-gaap:FinancialAssetNotPastDueMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancialAssetPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:FinancialAssetPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberus-gaap:FinancialAssetPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancialAssetPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SingleTenantLeaseMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SingleTenantLeaseMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SingleTenantLeaseMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SingleTenantLeaseMemberus-gaap:FinancialAssetPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SingleTenantLeaseMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:PublicFinanceMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:PublicFinanceMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:PublicFinanceMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:PublicFinanceMemberus-gaap:FinancialAssetPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:PublicFinanceMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:HealthcareFinanceMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:HealthcareFinanceMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:HealthcareFinanceMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:HealthcareFinanceMemberus-gaap:FinancialAssetPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:HealthcareFinanceMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SmallBusinessLendingMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SmallBusinessLendingMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SmallBusinessLendingMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SmallBusinessLendingMemberus-gaap:FinancialAssetPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:SmallBusinessLendingMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:FranchiseFinanceMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:FranchiseFinanceMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:FranchiseFinanceMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:FranchiseFinanceMemberus-gaap:FinancialAssetPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberinbk:FranchiseFinanceMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityLoanMemberus-gaap:FinancialAssetPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:HomeEquityLoanMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberinbk:OtherConsumerLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberinbk:OtherConsumerLoansMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberinbk:OtherConsumerLoansMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberinbk:OtherConsumerLoansMemberus-gaap:FinancialAssetPastDueMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberinbk:OtherConsumerLoansMemberus-gaap:FinancialAssetNotPastDueMember2023-12-310001562463us-gaap:FinancingReceivables30To59DaysPastDueMember2023-12-310001562463us-gaap:FinancingReceivables60To89DaysPastDueMember2023-12-310001562463us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-12-310001562463us-gaap:FinancialAssetPastDueMember2023-12-310001562463us-gaap:FinancialAssetNotPastDueMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberinbk:SmallBusinessLendingMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberinbk:SmallBusinessLendingMember2023-12-310001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberinbk:FranchiseFinanceMember2024-09-300001562463us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberinbk:FranchiseFinanceMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberus-gaap:ResidentialMortgageMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberus-gaap:ResidentialMortgageMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberinbk:OtherConsumerLoansMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberinbk:OtherConsumerLoansMember2023-12-310001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2024-09-300001562463us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2023-12-310001562463inbk:OwnerOccupiedCommercialRealEstateMemberinbk:CommercialRealEstate1Member2024-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMemberinbk:ResidentialRealEstate1Member2024-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMemberinbk:OtherRealEstateMember2024-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:CollateralPledgedMember2024-09-300001562463inbk:SmallBusinessLendingMemberinbk:CommercialRealEstate1Member2024-09-300001562463inbk:SmallBusinessLendingMemberinbk:ResidentialRealEstate1Member2024-09-300001562463inbk:SmallBusinessLendingMemberinbk:OtherRealEstateMember2024-09-300001562463inbk:SmallBusinessLendingMemberus-gaap:CollateralPledgedMember2024-09-300001562463inbk:FranchiseFinanceMemberinbk:CommercialRealEstate1Member2024-09-300001562463inbk:FranchiseFinanceMemberinbk:ResidentialRealEstate1Member2024-09-300001562463inbk:FranchiseFinanceMemberinbk:OtherRealEstateMember2024-09-300001562463inbk:FranchiseFinanceMemberus-gaap:CollateralPledgedMember2024-09-300001562463us-gaap:ResidentialMortgageMemberinbk:CommercialRealEstate1Member2024-09-300001562463us-gaap:ResidentialMortgageMemberinbk:ResidentialRealEstate1Member2024-09-300001562463us-gaap:ResidentialMortgageMemberinbk:OtherRealEstateMember2024-09-300001562463us-gaap:ResidentialMortgageMemberus-gaap:CollateralPledgedMember2024-09-300001562463inbk:OtherConsumerLoansMemberinbk:CommercialRealEstate1Member2024-09-300001562463inbk:OtherConsumerLoansMemberinbk:ResidentialRealEstate1Member2024-09-300001562463inbk:OtherConsumerLoansMemberinbk:OtherRealEstateMember2024-09-300001562463inbk:OtherConsumerLoansMemberus-gaap:CollateralPledgedMember2024-09-300001562463inbk:CommercialRealEstate1Member2024-09-300001562463inbk:ResidentialRealEstate1Member2024-09-300001562463inbk:OtherRealEstateMember2024-09-300001562463us-gaap:CollateralPledgedMember2024-09-300001562463inbk:OwnerOccupiedCommercialRealEstateMemberinbk:CommercialRealEstate1Member2023-12-310001562463inbk:OwnerOccupiedCommercialRealEstateMemberinbk:ResidentialRealEstate1Member2023-12-310001562463inbk:OwnerOccupiedCommercialRealEstateMemberinbk:OtherRealEstateMember2023-12-310001562463inbk:OwnerOccupiedCommercialRealEstateMemberus-gaap:CollateralPledgedMember2023-12-310001562463inbk:SmallBusinessLendingMemberinbk:CommercialRealEstate1Member2023-12-310001562463inbk:SmallBusinessLendingMemberinbk:ResidentialRealEstate1Member2023-12-310001562463inbk:SmallBusinessLendingMemberinbk:OtherRealEstateMember2023-12-310001562463inbk:SmallBusinessLendingMemberus-gaap:CollateralPledgedMember2023-12-310001562463us-gaap:ResidentialMortgageMemberinbk:CommercialRealEstate1Member2023-12-310001562463us-gaap:ResidentialMortgageMemberinbk:ResidentialRealEstate1Member2023-12-310001562463us-gaap:ResidentialMortgageMemberinbk:OtherRealEstateMember2023-12-310001562463us-gaap:ResidentialMortgageMemberus-gaap:CollateralPledgedMember2023-12-310001562463inbk:OtherConsumerLoansMemberinbk:CommercialRealEstate1Member2023-12-310001562463inbk:OtherConsumerLoansMemberinbk:ResidentialRealEstate1Member2023-12-310001562463inbk:OtherConsumerLoansMemberinbk:OtherRealEstateMember2023-12-310001562463inbk:OtherConsumerLoansMemberus-gaap:CollateralPledgedMember2023-12-310001562463inbk:CommercialRealEstate1Member2023-12-310001562463inbk:ResidentialRealEstate1Member2023-12-310001562463inbk:OtherRealEstateMember2023-12-310001562463us-gaap:CollateralPledgedMember2023-12-310001562463inbk:InvestorCommercialRealEstateMemberus-gaap:PaymentDeferralMember2024-07-012024-09-300001562463inbk:InvestorCommercialRealEstateMember2024-07-012024-09-300001562463inbk:FranchiseFinanceMemberus-gaap:PaymentDeferralMember2024-07-012024-09-300001562463us-gaap:PaymentDeferralMember2024-07-012024-09-300001562463inbk:InvestorCommercialRealEstateMemberus-gaap:PaymentDeferralMember2024-01-012024-09-300001562463inbk:InvestorCommercialRealEstateMember2024-01-012024-09-300001562463inbk:FranchiseFinanceMemberus-gaap:PaymentDeferralMember2024-01-012024-09-300001562463us-gaap:PaymentDeferralMember2024-01-012024-09-300001562463inbk:InvestorCommercialRealEstateMemberus-gaap:PaymentDeferralMember2024-09-300001562463inbk:FranchiseFinanceMemberus-gaap:PaymentDeferralMember2024-09-300001562463inbk:InvestorCommercialRealEstateMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463inbk:InvestorCommercialRealEstateMemberinbk:FinancialAsset30To89DaysPastDueMember2024-09-300001562463inbk:InvestorCommercialRealEstateMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463inbk:FranchiseFinanceMemberus-gaap:FinancialAssetNotPastDueMember2024-09-300001562463inbk:FranchiseFinanceMemberinbk:FinancialAsset30To89DaysPastDueMember2024-09-300001562463inbk:FranchiseFinanceMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2024-09-300001562463inbk:FinancialAsset30To89DaysPastDueMember2024-09-300001562463us-gaap:LandMember2024-09-300001562463us-gaap:LandMember2023-12-310001562463us-gaap:ConstructionInProgressMember2024-09-300001562463us-gaap:ConstructionInProgressMember2023-12-310001562463inbk:RightOfUseLeasedAssetMember2024-09-300001562463inbk:RightOfUseLeasedAssetMember2023-12-310001562463us-gaap:BuildingImprovementsMember2024-09-300001562463us-gaap:BuildingImprovementsMember2023-12-310001562463us-gaap:FurnitureAndFixturesMember2024-09-300001562463us-gaap:FurnitureAndFixturesMember2023-12-310001562463inbk:SBAGuaranteedLoansMemberinbk:LoanServicingMember2024-09-300001562463inbk:SBAGuaranteedLoansMemberinbk:LoanServicingMember2023-12-310001562463inbk:LoanServicingMember2024-09-300001562463inbk:LoanServicingMember2023-12-310001562463inbk:A6PercentFixedToFloatingRateSubordinatedNotesDue2029Memberus-gaap:SubordinatedDebtMember2019-06-300001562463inbk:A6PercentFixedToFloatingRateSubordinatedNotesDue2029Memberus-gaap:SubordinatedDebtMemberinbk:LondonInterbankOfferedRateLIBOR1Member2019-06-012019-06-300001562463inbk:A60TermNoteDue2030Memberus-gaap:SubordinatedDebtMember2020-10-310001562463inbk:A60TermNoteDue2030Memberus-gaap:SubordinatedDebtMemberus-gaap:SecuredOvernightFinancingRateSofrMember2020-10-012020-10-310001562463inbk:A375NotesDue2031Memberus-gaap:SubordinatedDebtMember2021-08-310001562463inbk:A375NotesDue2031Memberus-gaap:SubordinatedDebtMemberus-gaap:SecuredOvernightFinancingRateSofrMember2021-08-012021-08-310001562463inbk:Unregistered2031NotesMemberus-gaap:SubordinatedDebtMember2021-12-300001562463inbk:A6.4375PercentNotesDue2025Memberus-gaap:SubordinatedDebtMember2024-09-300001562463inbk:A6.4375PercentNotesDue2025Memberus-gaap:SubordinatedDebtMember2023-12-310001562463inbk:A6PercentNotesDue2021Memberus-gaap:SubordinatedDebtMember2024-09-300001562463inbk:A6PercentNotesDue2021Memberus-gaap:SubordinatedDebtMember2023-12-310001562463inbk:A6PercentFixedToFloatingRateSubordinatedNotesDue2029Memberus-gaap:SubordinatedDebtMember2024-09-300001562463inbk:A6PercentFixedToFloatingRateSubordinatedNotesDue2029Memberus-gaap:SubordinatedDebtMember2023-12-310001562463us-gaap:SubordinatedDebtMember2024-09-300001562463us-gaap:SubordinatedDebtMember2023-12-310001562463inbk:Plan2022Member2022-05-160001562463inbk:Plan2022Member2024-07-012024-09-300001562463inbk:Plan2022Member2024-01-012024-09-300001562463inbk:Plan2022Member2023-07-012023-09-300001562463inbk:Plan2022Member2023-01-012023-09-300001562463us-gaap:RestrictedStockUnitsRSUMemberinbk:Plan2022Member2023-12-310001562463us-gaap:RestrictedStockMemberinbk:Plan2022Member2023-12-310001562463inbk:DeferredStockUnitsMemberinbk:Plan2022Member2023-12-310001562463us-gaap:RestrictedStockUnitsRSUMemberinbk:Plan2022Member2024-01-012024-09-300001562463us-gaap:RestrictedStockMemberinbk:Plan2022Member2024-01-012024-09-300001562463inbk:DeferredStockUnitsMemberinbk:Plan2022Member2024-01-012024-09-300001562463us-gaap:RestrictedStockUnitsRSUMemberinbk:Plan2022Member2024-09-300001562463us-gaap:RestrictedStockMemberinbk:Plan2022Member2024-09-300001562463inbk:DeferredStockUnitsMemberinbk:Plan2022Member2024-09-300001562463inbk:Plan2013Member2024-09-300001562463inbk:Plan2013Memberus-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2024-07-012024-09-300001562463inbk:Plan2013Memberus-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2024-01-012024-09-300001562463inbk:Plan2013Memberus-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2023-07-012023-09-300001562463inbk:Plan2013Memberus-gaap:CommonStockMemberinbk:VotingAndNonVotingCommonStockMember2023-01-012023-09-300001562463us-gaap:RestrictedStockUnitsRSUMemberinbk:Plan2013Member2023-12-310001562463us-gaap:RestrictedStockMemberinbk:Plan2013Member2023-12-310001562463inbk:DeferredStockUnitsMemberinbk:Plan2013Member2023-12-310001562463us-gaap:RestrictedStockUnitsRSUMemberinbk:Plan2013Member2024-01-012024-09-300001562463us-gaap:RestrictedStockMemberinbk:Plan2013Member2024-01-012024-09-300001562463inbk:DeferredStockUnitsMemberinbk:Plan2013Member2024-01-012024-09-300001562463us-gaap:RestrictedStockUnitsRSUMemberinbk:Plan2013Member2024-09-300001562463us-gaap:RestrictedStockMemberinbk:Plan2013Member2024-09-300001562463inbk:DeferredStockUnitsMemberinbk:Plan2013Member2024-09-300001562463srt:DirectorMember2024-01-012024-09-300001562463us-gaap:FairValueInputsLevel1Memberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2024-09-300001562463us-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2024-09-300001562463us-gaap:FairValueInputsLevel3Memberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2024-09-300001562463us-gaap:FairValueInputsLevel1Memberus-gaap:MunicipalBondsMember2024-09-300001562463us-gaap:FairValueInputsLevel2Memberus-gaap:MunicipalBondsMember2024-09-300001562463us-gaap:FairValueInputsLevel3Memberus-gaap:MunicipalBondsMember2024-09-300001562463us-gaap:FairValueInputsLevel1Memberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-09-300001562463us-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageBackedSecuritiesMember2024-09-300001562463us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialMortgageBackedSecuritiesMember2024-09-300001562463us-gaap:FairValueInputsLevel1Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2024-09-300001562463us-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2024-09-300001562463us-gaap:FairValueInputsLevel1Memberus-gaap:AssetBackedSecuritiesMember2024-09-300001562463us-gaap:FairValueInputsLevel3Memberus-gaap:AssetBackedSecuritiesMember2024-09-300001562463us-gaap:FairValueInputsLevel1Memberus-gaap:CorporateDebtSecuritiesMember2024-09-300001562463us-gaap:FairValueInputsLevel2Memberus-gaap:CorporateDebtSecuritiesMember2024-09-300001562463us-gaap:FairValueInputsLevel3Memberus-gaap:CorporateDebtSecuritiesMember2024-09-300001562463us-gaap:FairValueInputsLevel1Member2024-09-300001562463us-gaap:FairValueInputsLevel2Member2024-09-300001562463us-gaap:FairValueInputsLevel3Member2024-09-300001562463us-gaap:InterestRateSwapMember2024-09-300001562463us-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateSwapMember2024-09-300001562463us-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateSwapMember2024-09-300001562463us-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateSwapMember2024-09-300001562463inbk:InterestRateSwapBackToBackMember2024-09-300001562463us-gaap:FairValueInputsLevel1Memberinbk:InterestRateSwapBackToBackMember2024-09-300001562463us-gaap:FairValueInputsLevel2Memberinbk:InterestRateSwapBackToBackMember2024-09-300001562463us-gaap:FairValueInputsLevel3Memberinbk:InterestRateSwapBackToBackMember2024-09-300001562463us-gaap:FairValueInputsLevel1Memberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel3Memberus-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel1Memberus-gaap:MunicipalBondsMember2023-12-310001562463us-gaap:FairValueInputsLevel2Memberus-gaap:MunicipalBondsMember2023-12-310001562463us-gaap:FairValueInputsLevel3Memberus-gaap:MunicipalBondsMember2023-12-310001562463us-gaap:FairValueInputsLevel1Memberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel2Memberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialMortgageBackedSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel1Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2023-12-310001562463us-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2023-12-310001562463us-gaap:FairValueInputsLevel1Memberus-gaap:AssetBackedSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel2Memberus-gaap:AssetBackedSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel3Memberus-gaap:AssetBackedSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel1Memberus-gaap:CorporateDebtSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel2Memberus-gaap:CorporateDebtSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel3Memberus-gaap:CorporateDebtSecuritiesMember2023-12-310001562463us-gaap:FairValueInputsLevel1Member2023-12-310001562463us-gaap:FairValueInputsLevel2Member2023-12-310001562463us-gaap:FairValueInputsLevel3Member2023-12-310001562463us-gaap:InterestRateSwapMember2023-12-310001562463us-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateSwapMember2023-12-310001562463us-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateSwapMember2023-12-310001562463us-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateSwapMember2023-12-310001562463inbk:InterestRateSwapBackToBackMember2023-12-310001562463us-gaap:FairValueInputsLevel1Memberinbk:InterestRateSwapBackToBackMember2023-12-310001562463us-gaap:FairValueInputsLevel2Memberinbk:InterestRateSwapBackToBackMember2023-12-310001562463us-gaap:FairValueInputsLevel3Memberinbk:InterestRateSwapBackToBackMember2023-12-310001562463inbk:ServicingAssetMember2024-06-300001562463us-gaap:InterestRateLockCommitmentsMember2024-06-300001562463inbk:ServicingAssetMember2024-07-012024-09-300001562463us-gaap:InterestRateLockCommitmentsMember2024-07-012024-09-300001562463inbk:ServicingAssetMember2024-09-300001562463us-gaap:InterestRateLockCommitmentsMember2024-09-300001562463inbk:ServicingAssetMember2023-06-300001562463us-gaap:InterestRateLockCommitmentsMember2023-06-300001562463inbk:ServicingAssetMember2023-07-012023-09-300001562463us-gaap:InterestRateLockCommitmentsMember2023-07-012023-09-300001562463inbk:ServicingAssetMember2023-09-300001562463us-gaap:InterestRateLockCommitmentsMember2023-09-300001562463inbk:ServicingAssetMember2023-12-310001562463us-gaap:InterestRateLockCommitmentsMember2023-12-310001562463inbk:ServicingAssetMember2024-01-012024-09-300001562463us-gaap:InterestRateLockCommitmentsMember2024-01-012024-09-300001562463inbk:ServicingAssetMember2022-12-310001562463us-gaap:InterestRateLockCommitmentsMember2022-12-310001562463inbk:ServicingAssetMember2023-01-012023-09-300001562463us-gaap:InterestRateLockCommitmentsMember2023-01-012023-09-300001562463us-gaap:FairValueInputsLevel3Memberinbk:ImpairedLoansMember2024-09-300001562463us-gaap:FairValueInputsLevel3Memberinbk:ImpairedLoansMember2023-12-310001562463srt:MinimumMemberinbk:ImpairedLoansMemberus-gaap:FairValueInputsLevel3Memberinbk:MeasurementInputDiscountForTypeOfPropertyAndCurrentMarketConditionsMemberinbk:ValuationTechniqueFairValueOfCollateralMember2024-09-300001562463srt:MaximumMemberinbk:ImpairedLoansMemberus-gaap:FairValueInputsLevel3Memberinbk:MeasurementInputDiscountForTypeOfPropertyAndCurrentMarketConditionsMemberinbk:ValuationTechniqueFairValueOfCollateralMember2024-09-300001562463srt:WeightedAverageMemberinbk:ImpairedLoansMemberus-gaap:FairValueInputsLevel3Memberinbk:MeasurementInputDiscountForTypeOfPropertyAndCurrentMarketConditionsMemberinbk:ValuationTechniqueFairValueOfCollateralMember2024-09-300001562463us-gaap:FairValueInputsLevel3Memberinbk:ServicingAssetMember2024-09-300001562463srt:MinimumMemberinbk:ServicingAssetMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-09-300001562463srt:MaximumMemberinbk:ServicingAssetMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-09-300001562463us-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberinbk:ServicingAssetMember2024-09-300001562463srt:WeightedAverageMemberinbk:ServicingAssetMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-09-300001562463srt:WeightedAverageMemberinbk:ServicingAssetMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-09-300001562463srt:MinimumMemberinbk:ImpairedLoansMemberus-gaap:FairValueInputsLevel3Memberinbk:MeasurementInputDiscountForTypeOfPropertyAndCurrentMarketConditionsMemberinbk:ValuationTechniqueFairValueOfCollateralMember2023-12-310001562463srt:MaximumMemberinbk:ImpairedLoansMemberus-gaap:FairValueInputsLevel3Memberinbk:MeasurementInputDiscountForTypeOfPropertyAndCurrentMarketConditionsMemberinbk:ValuationTechniqueFairValueOfCollateralMember2023-12-310001562463srt:WeightedAverageMemberinbk:ImpairedLoansMemberus-gaap:FairValueInputsLevel3Memberinbk:MeasurementInputDiscountForTypeOfPropertyAndCurrentMarketConditionsMemberinbk:ValuationTechniqueFairValueOfCollateralMember2023-12-310001562463us-gaap:FairValueInputsLevel3Memberinbk:ServicingAssetMember2023-12-310001562463srt:MinimumMemberinbk:ServicingAssetMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001562463srt:MaximumMemberinbk:ServicingAssetMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001562463us-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberinbk:ServicingAssetMember2023-12-310001562463srt:WeightedAverageMemberinbk:ServicingAssetMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputPrepaymentRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001562463srt:WeightedAverageMemberinbk:ServicingAssetMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001562463us-gaap:DesignatedAsHedgingInstrumentMember2024-09-300001562463us-gaap:DesignatedAsHedgingInstrumentMember2023-12-310001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:AvailableforsaleSecuritiesMember2024-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:AvailableforsaleSecuritiesMember2024-01-012024-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2024-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2024-01-012024-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:AvailableforsaleSecuritiesMember2023-12-310001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:AvailableforsaleSecuritiesMember2023-01-012023-12-310001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2023-12-310001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2023-01-012023-12-310001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:AvailableforsaleSecuritiesMember2021-03-012021-03-310001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:AvailableforsaleSecuritiesMember2024-07-012024-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:AvailableforsaleSecuritiesMember2023-07-012023-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:AvailableforsaleSecuritiesMember2023-01-012023-09-3000015624632020-06-012020-06-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:LoansMember2024-01-012024-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:LoansMember2024-07-012024-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:LoansMember2023-07-012023-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:LoansMember2023-01-012023-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberinbk:A3MonthLIBORMember2024-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberinbk:A3MonthLIBORMember2024-01-012024-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberinbk:A3MonthLIBORMember2023-12-310001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberinbk:A3MonthLIBORMember2023-01-012023-12-310001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FederalFundsEffectiveSwapRateMember2023-12-310001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FederalFundsEffectiveSwapRateMember2023-01-012023-12-310001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:LoansMember2024-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:LoansMember2023-12-310001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:AvailableforsaleSecuritiesMember2024-09-300001562463us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:AvailableforsaleSecuritiesMember2023-12-310001562463inbk:BackToBackSwapsMemberus-gaap:NondesignatedMember2024-09-300001562463inbk:BackToBackSwapsMemberus-gaap:NondesignatedMember2023-12-310001562463us-gaap:InterestRateSwapMember2024-07-012024-09-300001562463us-gaap:InterestRateSwapMember2023-07-012023-09-300001562463us-gaap:InterestRateSwapMember2024-01-012024-09-300001562463us-gaap:InterestRateSwapMember2023-01-012023-09-300001562463us-gaap:InterestRateLockCommitmentsMember2024-07-012024-09-300001562463us-gaap:InterestRateLockCommitmentsMember2023-07-012023-09-300001562463us-gaap:InterestRateLockCommitmentsMember2024-01-012024-09-300001562463us-gaap:InterestRateLockCommitmentsMember2023-01-012023-09-300001562463us-gaap:ForwardContractsMember2024-07-012024-09-300001562463us-gaap:ForwardContractsMember2023-07-012023-09-300001562463us-gaap:ForwardContractsMember2024-01-012024-09-300001562463us-gaap:ForwardContractsMember2023-01-012023-09-300001562463inbk:SecuritiesNonTaxableMemberus-gaap:InterestRateSwapMember2024-07-012024-09-300001562463inbk:SecuritiesNonTaxableMemberus-gaap:InterestRateSwapMember2023-07-012023-09-300001562463inbk:SecuritiesNonTaxableMemberus-gaap:InterestRateSwapMember2024-01-012024-09-300001562463inbk:SecuritiesNonTaxableMemberus-gaap:InterestRateSwapMember2023-01-012023-09-300001562463us-gaap:InterestIncomeMemberus-gaap:InterestRateSwapMember2024-07-012024-09-300001562463us-gaap:InterestIncomeMemberus-gaap:InterestRateSwapMember2023-07-012023-09-300001562463us-gaap:InterestIncomeMemberus-gaap:InterestRateSwapMember2024-01-012024-09-300001562463us-gaap:InterestIncomeMemberus-gaap:InterestRateSwapMember2023-01-012023-09-300001562463us-gaap:DepositsMemberus-gaap:InterestRateSwapMember2024-07-012024-09-300001562463us-gaap:DepositsMemberus-gaap:InterestRateSwapMember2023-07-012023-09-300001562463us-gaap:DepositsMemberus-gaap:InterestRateSwapMember2024-01-012024-09-300001562463us-gaap:DepositsMemberus-gaap:InterestRateSwapMember2023-01-012023-09-300001562463inbk:OtherBorrowedFundsMemberus-gaap:InterestRateSwapMember2024-07-012024-09-300001562463inbk:OtherBorrowedFundsMemberus-gaap:InterestRateSwapMember2023-07-012023-09-300001562463inbk:OtherBorrowedFundsMemberus-gaap:InterestRateSwapMember2024-01-012024-09-300001562463inbk:OtherBorrowedFundsMemberus-gaap:InterestRateSwapMember2023-01-012023-09-300001562463us-gaap:InterestExpenseMemberus-gaap:InterestRateSwapMember2024-07-012024-09-300001562463us-gaap:InterestExpenseMemberus-gaap:InterestRateSwapMember2023-07-012023-09-300001562463us-gaap:InterestExpenseMemberus-gaap:InterestRateSwapMember2024-01-012024-09-300001562463us-gaap:InterestExpenseMemberus-gaap:InterestRateSwapMember2023-01-012023-09-300001562463inbk:InterestIncomeNetMemberus-gaap:InterestRateSwapMember2024-07-012024-09-300001562463inbk:InterestIncomeNetMemberus-gaap:InterestRateSwapMember2023-07-012023-09-300001562463inbk:InterestIncomeNetMemberus-gaap:InterestRateSwapMember2024-01-012024-09-300001562463inbk:InterestIncomeNetMemberus-gaap:InterestRateSwapMember2023-01-012023-09-300001562463us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-12-310001562463inbk:AOCIAccumulatedGainLossDebtSecuritiesHeldToMaturityParentMember2023-12-310001562463us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-12-310001562463inbk:AOCIAccumulatedGainLossDebtSecuritiesHeldToMaturityParentMember2024-01-012024-09-300001562463us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2024-01-012024-09-300001562463us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2024-09-300001562463inbk:AOCIAccumulatedGainLossDebtSecuritiesHeldToMaturityParentMember2024-09-300001562463us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2024-09-300001562463us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-12-310001562463inbk:AOCIAccumulatedGainLossDebtSecuritiesHeldToMaturityParentMember2022-12-310001562463us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-12-310001562463inbk:AOCIAccumulatedGainLossDebtSecuritiesHeldToMaturityParentMember2023-01-012023-09-300001562463us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-01-012023-09-300001562463us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-09-300001562463inbk:AOCIAccumulatedGainLossDebtSecuritiesHeldToMaturityParentMember2023-09-300001562463us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-09-300001562463us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2024-06-300001562463inbk:AOCIAccumulatedGainLossDebtSecuritiesHeldToMaturityParentMember2024-06-300001562463us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2024-06-300001562463inbk:AOCIAccumulatedGainLossDebtSecuritiesHeldToMaturityParentMember2024-07-012024-09-300001562463us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2024-07-012024-09-300001562463us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-06-300001562463inbk:AOCIAccumulatedGainLossDebtSecuritiesHeldToMaturityParentMember2023-06-300001562463us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-06-300001562463inbk:AOCIAccumulatedGainLossDebtSecuritiesHeldToMaturityParentMember2023-07-012023-09-300001562463us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-07-012023-09-30

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 
FORM 10-Q
 
(Mark One)
QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the Quarterly Period ended September 30, 2024
OR
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the Transition Period From ________ to ________.
 
Commission File Number 001-35750 
First Internet Bancorp
(Exact Name of Registrant as Specified in Its Charter)
Indiana 20-3489991
(State or Other Jurisdiction of
Incorporation or Organization)
 (I.R.S. Employer
Identification No.)
   
8701 East 116th Street
Fishers, IN
 46038
(Address of Principal Executive Offices) (Zip Code)
(317) 532-7900
(Registrant’s Telephone Number, Including Area Code)
Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading SymbolsName of each exchange on which registered
Common Stock, without par valueINBKThe Nasdaq Stock Market LLC
6.0% Fixed to Floating Subordinated Notes due 2029INBKZThe Nasdaq Stock Market LLC
Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes þ No ¨
 
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes þ No ¨
 
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large Accelerated Filer ¨
Accelerated Filer þ
Non-accelerated Filer ¨
Smaller Reporting Company 
Emerging growth company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes  No þ
 
As of November 1, 2024, the registrant had 8,667,894 shares of common stock issued and outstanding.



Cautionary Note Regarding Forward-Looking Statements
  
This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of the federal securities laws. These statements are not historical facts, but rather statements based on the current expectations of First Internet Bancorp and its consolidated subsidiaries (the “Company,” “we,” “our,” or “us”) regarding our business strategies, intended results and future performance, including without limitation statements concerning the financial condition, results of operations, trends in lending policies and loan programs, plans and prospective business partnerships, objectives, future performance and business of the Company. Forward-looking statements are generally preceded by terms such as “acquire”, “anticipate,” “attempt,” “believe,” “can,” “change,” “continue,” “could,” “decline,” “decrease,” “differentiate,” “diversify,” “driving,” “effort,” “emerging,” “estimate,” “expect,” “grow,” “increase,” “intend,” “likely,” “may,” “objective,” “plan,” “position,” “potential,” “preliminary,” “pursue,” “remain,” “retain,” “should,” “slowest,” “succeed,” “will,” “win,” “would” or other similar expressions. Such statements are subject to certain risks and uncertainties, including without limitation: changes in market rates and prices that may adversely impact the value of securities, loans, deposits and other financial instruments and the interest rate sensitivity of our balance sheet; changes in bank regulatory conditions, policies or programs, whether arising as a result of new legislation or regulatory initiatives, that could lead to restrictions on activities of banks generally or First Internet Bank (the “Bank”) in particular; changes in the enforcement and interpretation of applicable laws and regulations by governmental and self-regulatory agencies, which could require us to change certain business practices, increase compliance risk, reduce our revenue, impose additional costs on us, or otherwise negatively affect our businesses; more restrictive regulatory capital requirements; increased costs, including deposit insurance premiums; increased regulatory scrutiny resulting from bank failures; risks related to potential claims, damages, penalties, fines and reputational damage resulting from pending or future litigation, regulatory proceedings or enforcement actions; the risk that we may be required to make substantial expenditures to keep pace with regulatory initiatives and the rapid technology changes in the financial services market; other general economic conditions, whether national or regional, and conditions in the lending markets in which we participate that may have an adverse effect on the demand for our loans and other products; our credit quality and related levels of nonperforming assets and credit losses, and the value and salability of the real estate that is the collateral for our loans; failures or breaches of or interruptions in the communication and information systems on which we rely to conduct our business that could reduce our revenues, increase our costs or lead to disruptions in our business; our dependence on capital distributions from the Bank; results of examinations of us by our regulators, including the possibility that our regulators may, among other things, require us to increase our allowance for credit losses or to write-down assets; regulation or prohibition of certain income producing activities or changes in the secondary market for loans and other products; our liquidity requirements being adversely affected by changes in our assets and liabilities; the effect of legislative or regulatory developments, including changes in laws concerning taxes, banking, securities, insurance and other aspects of the financial services industry; competitive factors among financial services organizations, including product and pricing pressures and our ability to attract, develop and retain qualified banking professionals; the growth and profitability of noninterest or fee income being less than expected; the loss of any key members of senior management; the effect of changes in accounting policies and practices, as may be adopted by the Financial Accounting Standards Board, the Securities and Exchange Commission (the “SEC”), the Public Company Accounting Oversight Board and other regulatory agencies; and the effect of fiscal and governmental policies of the United States federal government. Additional factors that may affect our results include those discussed in this Quarterly Report on Form 10-Q and our most recent Annual Report on Form 10-K under the heading “Risk Factors” and in other reports filed with the SEC. We caution readers not to place undue reliance on any such forward-looking statements, which speak only as of the date made. The factors listed above could affect our financial performance and could cause our actual results for future periods to differ materially from any opinions or statements expressed with respect to future periods in any current statements.

Except as required by law, we do not undertake, and specifically disclaim any obligation, to publicly release the result of any revisions that may be made to any forward-looking statements to reflect events or circumstances after the date of such statements or to reflect the occurrence of anticipated or unanticipated events.
i


PART I

ITEM 1.    FINANCIAL STATEMENTS 

First Internet Bancorp
Condensed Consolidated Balance Sheets
(Amounts in thousands except share data)
 September 30, 2024December 31, 2023
 (Unaudited) 
Assets  
Cash and due from banks$6,539 $8,269 
Interest-bearing deposits705,940 397,629 
Total cash and cash equivalents712,479 405,898 
Securities available-for-sale, at fair value (amortized cost of $605,722 and $513,315 in 2024 and 2023, respectively)
575,257 474,855 
Securities held-to-maturity, at amortized cost, net of allowance for credit losses of $0.2 million and $0.3 million in 2024 and 2023, respectively, (fair value of $249,618 and $207,572 in 2024 and 2023, respectively)
263,320 227,153 
Loans held-for-sale32,996 22,052 
Loans4,035,880 3,840,220 
Allowance for credit losses - loans(45,721)(38,774)
Net loans3,990,159 3,801,446 
Accrued interest receivable27,750 26,746 
Federal Home Loan Bank of Indianapolis stock28,350 28,350 
Cash surrender value of bank-owned life insurance41,111 40,882 
Premises and equipment, net72,150 73,463 
Goodwill4,687 4,687 
Servicing asset, at fair value14,662 10,567 
Other real estate owned251 375 
Accrued income and other assets60,087 51,098 
Total assets$5,823,259 $5,167,572 
Liabilities and Shareholders’ Equity  
Liabilities  
Noninterest-bearing deposits$111,591 $123,464 
Interest-bearing deposits4,686,119 3,943,509 
Total deposits4,797,710 4,066,973 
Advances from Federal Home Loan Bank515,000 614,934 
Subordinated debt, net of unamortized debt issuance costs of $1,929 and $2,162 in 2024 and 2023, respectively
105,071 104,838 
Accrued interest payable2,808 3,848 
Accrued expenses and other liabilities17,541 14,184 
Total liabilities5,438,130 4,804,777 
Commitments and Contingencies
Shareholders’ Equity  
Preferred stock, no par value; 4,913,779 shares authorized; issued and outstanding - none
  
Voting common stock, no par value; 45,000,000 shares authorized; 8,667,894 and 8,644,451 shares issued and outstanding in 2024 and 2023, respectively
185,631 184,700 
Nonvoting common stock, no par value; 86,221 shares authorized; issued and outstanding - none
  
Retained earnings223,824 207,470 
Accumulated other comprehensive loss(24,326)(29,375)
Total shareholders’ equity385,129 362,795 
Total liabilities and shareholders’ equity$5,823,259 $5,167,572 

See Notes to Condensed Consolidated Financial Statements
1


First Internet Bancorp
Condensed Consolidated Statements of Income – Unaudited
(Amounts in thousands except share and per share data)
 Three Months EndedNine Months Ended
 September 30, 2024September 30, 2023September 30, 2024September 30, 2023
Interest Income   
Loans$59,792 $48,898 $172,321 $139,647 
Securities – taxable6,953 4,301 19,123 11,742 
Securities – non-taxable1,042 912 2,981 2,570 
Other earning assets7,203 8,904 19,691 19,211 
Total interest income74,990 63,015 214,116 173,170 
Interest Expense   
Deposits47,415 40,339 134,039 102,285 
Other borrowed funds5,810 5,298 16,251 15,788 
Total interest expense53,225 45,637 150,290 118,073 
Net Interest Income21,765 17,378 63,826 55,097 
Provision for credit losses - loans3,858 1,850 10,360 11,976 
Benefit for credit losses - debt securities held to maturity(29)(15)(93)(15)
(Benefit) Provision for credit losses - off-balance sheet commitments(439)111 (398)1,098 
Net Interest Income After Provision for Credit Losses18,375 15,432 53,957 42,038 
Noninterest Income   
Service charges and fees245 208 711 635 
Loan servicing revenue1,570 1,064 4,363 2,699 
Loan servicing asset revaluation(846)(257)(2,109)(670)
Mortgage banking activities   76 
Gain on sale of loans9,933 5,569 24,761 14,498 
Other1,127 823 3,683 1,486 
Total noninterest income12,029 7,407 31,409 18,724 
Noninterest Expense   
Salaries and employee benefits13,456 11,767 37,714 34,267 
Marketing, advertising and promotion548 500 1,893 2,049 
Consulting and professional services902 552 2,777 2,189 
Data processing675 701 1,845 1,880 
Loan expenses1,524 1,336 4,566 4,385 
Premises and equipment2,918 2,315 8,898 7,753 
Deposit insurance premium1,219 1,067 3,536 2,546 
Other1,552 1,518 4,924 4,311 
Total noninterest expense22,794 19,756 66,153 59,380 
Income Before Income Taxes7,610 3,083 19,213 1,382 
Income Tax Provision (Benefit)620 (326)1,267 (2,892)
Net Income $6,990 $3,409 $17,946 $4,274 
Income Per Share of Common Stock   
Basic$0.80 $0.39 $2.07 $0.48 
Diluted$0.80 $0.39 $2.05 $0.48 
Weighted-Average Number of Common Shares Outstanding   
Basic8,696,634 8,744,385 8,688,304 8,889,532 
Diluted8,768,731 8,767,217 8,756,544 8,907,748 
Dividends Declared Per Share$0.06 $0.06 $0.18 $0.18 

See Notes to Condensed Consolidated Financial Statements
2


First Internet Bancorp
Condensed Consolidated Statements of Comprehensive Income (Loss) – Unaudited
(Amounts in thousands)
 Three Months Ended September 30,Nine Months Ended September 30,
 2024202320242023
Net income $6,990 $3,409 $17,946 $4,274 
Other comprehensive income (loss)
Securities available-for-sale
Net unrealized holding gains (losses) recorded within other comprehensive income (loss) before income tax10,620 (11,308)7,995 (11,006)
Income tax provision (benefit) 2,442 (2,600)1,841 (2,537)
Net effect on other comprehensive income (loss)8,178 (8,708)6,154 (8,469)
Securities held-to-maturity
Amortization of net unrealized holding losses on securities transferred from available-for-sale to held-to-maturity185 173 607 537 
Income tax provision 46 45 149 140 
Net effect on other comprehensive income139 128 458 397 
Cash flow hedges
Net unrealized holding (losses) gains on cash flow hedging derivatives recorded within other comprehensive income (loss) before income tax(2,670)740 (2,030)664 
Income tax (benefit) provision (614)171 (467)153 
Net effect on other comprehensive (loss) income (2,056)569 (1,563)511 
Total other comprehensive income (loss) 6,261 (8,011)5,049 (7,561)
Comprehensive income (loss)$13,251 $(4,602)$22,995 $(3,287)
 
 See Notes to Condensed Consolidated Financial Statements
3


First Internet Bancorp
Condensed Consolidated Statements of Changes in Shareholders’ Equity - Unaudited
Nine Months Ended September 30, 2024 and 2023
(Amounts in thousands except share and per share data)
Voting and
Nonvoting
Common
Stock
Retained
Earnings
Accumulated
Other
Comprehensive
Loss
Total
Shareholders’
Equity
Balance, January 1, 2024$184,700 $207,470 $(29,375)$362,795 
Net income— 17,946 — 17,946 
Other comprehensive income — — 5,049 5,049 
Dividends declared ($0.18 per share)
— (1,592)— (1,592)
Recognition of the fair value of share-based compensation1,356 — — 1,356 
Repurchased shares of common stock (10,500)
(283)— — (283)
Excise tax on repurchase of common stock(3)— — (3)
Deferred stock rights and restricted stock units issued in lieu of cash dividends payable on outstanding deferred stock rights and restricted stock units3— — 3 
Common stock redeemed for the net settlement of share-based awards(142)— — (142)
Balance, September 30, 2024$185,631 $223,824 $(24,326)$385,129 
Balance, January 1, 2023$192,935 $205,675 $(33,636)$364,974 
Impact of adoption of new accounting standards 1
— (4,491)— (4,491)
Net income— 4,274 — 4,274 
Other comprehensive loss— — (7,561)(7,561)
Dividends declared ($0.18 per share)
— (1,602)— (1,602)
Recognition of the fair value of share-based compensation873 — — 873 
Repurchased shares of common stock (462,525)
(8,535)— — (8,535)
Excise tax on repurchase of common stock(85)— — (85)
Deferred stock rights and restricted stock units issued in lieu of cash dividends payable on outstanding deferred stock rights and restricted stock units3 — — 3 
Common stock redeemed for the net settlement of share-based awards(106)— — (106)
Balance, September 30, 2023$185,085 $203,856 $(41,197)$347,744 
1 Reflects the impact of adopting Accounting Standards Update (“ASU”) 2016-13.

See Notes to Condensed Consolidated Financial Statements
4


First Internet Bancorp
Condensed Consolidated Statements of Changes in Shareholders’ Equity - Unaudited
Three Months Ended September 30, 2024 and 2023
(Amounts in thousands except share and per share data)
Voting and
Nonvoting
Common
Stock
Retained
Earnings
Accumulated
Other
Comprehensive
Loss
Total
Shareholders’
Equity
Balance, July 1, 2024185,175 $217,365 $(30,587)$371,953 
Net income— 6,990 — 6,990 
Other comprehensive income — — 6,261 6,261 
Dividends declared ($0.06 per share)
— (531)— (531)
Recognition of the fair value of share-based compensation454 — — 454 
Deferred stock rights and restricted stock units issued in lieu of cash dividends payable on outstanding deferred stock rights and restricted stock units2 — — 2 
Balance, September 30, 2024$185,631 $223,824 $(24,326)$385,129 
Balance, July 1, 2023$186,545 $200,973 $(33,186)$354,332 
Net income— 3,409 — 3,409 
Other comprehensive loss— — (8,011)(8,011)
Dividends declared ($0.06 per share)
— (526)— (526)
Recognition of the fair value of share-based compensation386 — — 386 
Repurchased shares of common stock (97,834)
(1,828)(1,828)
Excise tax on repurchase of common stock(18)— — (18)
Balance, September 30, 2023$185,085 $203,856 $(41,197)$347,744 


See Notes to Condensed Consolidated Financial Statements


5


First Internet Bancorp
Condensed Consolidated Statements of Cash Flows – Unaudited
(Amounts in thousands)
 Nine Months Ended September 30,
 20242023
Operating Activities  
Net income $17,946 $4,274 
Adjustments to reconcile net income to net cash used in operating activities:  
Depreciation and amortization6,030 3,019 
Increase in cash surrender value of bank-owned life insurance(817)(760)
Provision for credit losses 9,869 13,059 
Share-based compensation expense1,356 873 
Loans originated for sale(366,948)(248,622)
Proceeds from sale of loans374,561 249,296 
Gain on loans sold(24,761)(14,969)
Gain on sale of other real estate owned(31) 
Decrease in fair value of loans held-for-sale 143 
Loss on derivatives768 362 
Gain on bank-owned life insurance(149) 
Loan servicing asset revaluation2,109 670 
Net change in accrued income and other assets(3,525)(4,385)
Net change in accrued expenses and other liabilities2,739 (3,584)
Net cash provided by (used in) operating activities19,147 (624)
Investing Activities
Net loan activity, excluding purchases(117,719)(51,677)
Proceeds from sale of other real estate owned406  
Maturities and calls of securities available-for-sale54,418 39,749 
Purchase of securities available-for-sale(148,019)(110,749)
Maturities and calls of securities held-to-maturity18,426 14,236 
Purchase of securities held-to-maturity(53,977)(53,573)
Purchase of premises and equipment(2,097)(4,970)
Proceeds from bank-owned life insurance737  
Loans purchased(81,605)(194,318)
Other investing activities(11,857)(3,442)
Net cash used in investing activities(341,287)(364,744)
Financing Activities
Net increase in deposits730,737 640,370 
Cash dividends paid(1,580)(1,623)
Repurchase of common stock(283)(8,620)
Proceeds from advances from Federal Home Loan Bank430,000 415,000 
Repayment of advances from Federal Home Loan Bank(530,000)(415,000)
Other, net(153)(106)
Net cash provided by financing activities628,721 630,021 
Net Increase in Cash and Cash Equivalents306,581 264,653 
Cash and Cash Equivalents, Beginning of Period405,898 256,552 
Cash and Cash Equivalents, End of Period$712,479 $521,205 
Supplemental Disclosures
Cash paid during the period for interest151,330 118,019 
Cash paid during the period for taxes492 864 
Loans transferred to other real estate owned251 106 
Cash dividends declared, paid in subsequent period520 520 
Securities purchased during the period, settled in subsequent period 2,632 


See Notes to Condensed Consolidated Financial Statements
6


First Internet Bancorp
Notes to Condensed Consolidated Financial Statements – Unaudited
(Table amounts in thousands except share and per share data)
  
Note 1:        Basis of Presentation
 
The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information or footnotes necessary for a complete presentation of financial condition, results of operations, changes in shareholders’ equity, or cash flows in accordance with GAAP. In our opinion, all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation have been included. The results of operations for the three and nine months ended September 30, 2024 are not necessarily indicative of the results expected for the year ending December 31, 2024 or any other period. The September 30, 2024 condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the First Internet Bancorp Annual Report on Form 10-K for the year ended December 31, 2023.
 
The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates, judgments, or assumptions that could have a material effect on the carrying value of certain assets and liabilities. These estimates, judgments, and assumptions affect the amounts reported in the condensed consolidated financial statements and the disclosures provided. The determination of the allowance for credit losses, income taxes, valuations and impairments of investment securities and goodwill, as well as fair value measurements of derivatives and loans held-for-sale are highly dependent upon management’s estimates, judgments, and assumptions, and changes in any of these could have a significant impact on the condensed consolidated financial statements.

The condensed consolidated financial statements include the accounts of First Internet Bancorp (the “Company”), its wholly owned subsidiary, First Internet Bank of Indiana (the “Bank”), and the Bank’s three wholly owned subsidiaries, First Internet Public Finance Corp., JKH Realty Services, LLC and SPF15, Inc. All significant intercompany accounts and transactions have been eliminated in consolidation.
 
The Company is subject to claims and lawsuits that arise primarily in the ordinary course of business. It is the opinion of management that the disposition or ultimate resolution of such claims and lawsuits will not have a material adverse effect on the consolidated financial position, results of operations, and cash flows of the Company.


7


Note 2:        Earnings Per Share
 
Earnings per share of common stock are based on the weighted-average number of basic shares and dilutive shares outstanding during the period.
 
The following is a reconciliation of the weighted-average common shares for the basic and diluted earnings per share computations for the three and nine months ended September 30, 2024 and 2023. 
(dollars in thousands, except share and per share data)Three Months Ended September 30,Nine Months Ended September 30,
 2024202320242023
Basic earnings per share  
Net income $6,990 $3,409 $17,946 $4,274 
Weighted-average common shares8,696,634 8,744,385 8,688,304 8,889,532 
Basic earnings per common share$0.80 $0.39 $2.07 $0.48 
Diluted earnings per share