ISBC


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets
us-gaap:ConsolidatedEntities
us-gaap:CapitalToRiskWeightedAssets

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GeneralAndAdministrativeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:IncomeTaxesPaid

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestExpense
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InterestIncomeExpenseNet
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InterestPaidNet

us-gaap:MarketingAndAdvertisingExpense

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:StatementEquityComponents

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:IncomeStatementLocation

us-gaap:Assets
us-gaap:ConsolidatedEntities

us-gaap:Liabilities
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapital

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:Goodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:OperatingLeaseRightOfUseAsset
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:EquitySecuritiesFvNi
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementFrequency

us-gaap:OtherAssets
us-gaap:ConsolidatedEntities

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationDepletionAndAmortization

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividends

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

isbc:AmortizationOfDebtModificationCostsAndPremiumOnBorrowings
isbc:AssetAcquisition
isbc:AssetAcquisitionDeposits
us-gaap:AssetAcquisition
isbc:AssetAcquisition
isbc:AssetAcquisitionLoansAcquired
us-gaap:AssetAcquisition

isbc:CashReceivedNetOFCashConsiderationPaidForAcquisitions

isbc:ComprehensiveIncomeBeforeTaxAttributableToParent

isbc:ComprehensiveIncomeTaxAttributableToParent
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
isbc:FeeIncomeFromDerivativeInstrument

isbc:FinancingReceivableAllowanceForCreditLossWriteOffAfterRecoveryNet

isbc:FinancingReceivableAllowanceforCreditLossWriteoffafterRecoveryNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
isbc:FiniteIntangibleAssetsValuationAllowanceIncreaseDecrease

isbc:GainOnDispositionOfLoansReceivable

isbc:GainOnDispositionofLeasedEquipment

isbc:IncomeOnBankOwnedLifeInsurance

isbc:InterestIncomeOnNonAccrualLoans

isbc:NoncashOrPartNoncashAcquisitionDepositsAssumed

isbc:NoncashorPartNoncashAcquisitionLoansAcquired

isbc:OtherComprehensiveLossHeldToMaturitySecurityAdjustmentFromAOCIForAccretionOfTransfersFromAvailableForSaleToHeldToMaturityAfterTax

isbc:OtherComprehensiveLossHeldtomaturitySecurityAdjustmentfromAOCIforAccretionofTransfersfromAvailableforSaletoHeldtoMaturityAfterTax

isbc:PaymentsforProceedsfromLoanOriginations

isbc:PaymenttoAcquireEquitySecurities

isbc:PrincipalAppliedOnAffordableHousingProjectAdvance

isbc:PrincipalProceedsFromSaleAndMaturityOfHeldToMaturitySecurities

isbc:ProceedsFromSaleOfEquitySecuritiesFVNI

isbc:ProceedsFromSaleOfLoansAndLeasesReceivable

isbc:RealEstateAcquiredForeclosure

isbc:RightofUseAssetObtainedinExchangeforOperatingLeaseLiabilityExcludingAcquisitions
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
isbc:TroubledDebtRestructuringWeightedAverageInterestRate
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
isbc:WeightedAverageModifiedYield
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:AmortizationOfDebtDiscountPremium

us-gaap:AmortizationOfESOPAward
us-gaap:StatementEquityComponents

us-gaap:BankOwnedLifeInsuranceIncome
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1
us-gaap:SubsequentEventType
us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:DebtAndEquitySecuritiesGainLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss

us-gaap:DebtSecuritiesHeldToMaturityCreditLossExpenseReversal
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

us-gaap:DividendIncomeEquitySecuritiesOperating

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EmployeeBenefitsAndShareBasedCompensation

us-gaap:EquitySecuritiesFvNiGainLoss

us-gaap:EquitySecuritiesFvNiRealizedGainLoss

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss
us-gaap:SubsequentEventType
us-gaap:ExtinguishmentOfDebtAmount

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FinitelivedIntangibleAssetsAcquired1
us-gaap:DerivativeInstrumentRisk
us-gaap:GainLossOnDerivativeInstrumentsNetPretax

us-gaap:GainLossOnSaleOfLoansAndLeases

us-gaap:GainLossOnSaleOfMortgageLoans
us-gaap:StatementScenario, us-gaap:DisposalGroupClassification
us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainsLossesOnSalesOfOtherRealEstate

us-gaap:HeldToMaturitySecuritiesSoldSecurityRealizedGainLoss

us-gaap:IncreaseDecreaseInAccruedInterestReceivableNet

us-gaap:IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance

us-gaap:IncreaseDecreaseInDeposits

us-gaap:IncreaseDecreaseInOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:InformationTechnologyAndDataProcessing

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestExpenseBorrowings

us-gaap:InterestExpenseDeposits

us-gaap:InterestIncomeDepositsWithFinancialInstitutions

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeFederalHomeLoanBankAdvances

us-gaap:InterestIncomeSecuritiesMortgageBacked

us-gaap:InterestIncomeSecuritiesOtherUSGovernment

us-gaap:InterestIncomeSecuritiesStateAndMunicipal

us-gaap:InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions

us-gaap:LaborAndRelatedExpense
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:NoncashOrPartNoncashAcquisitionDebtAssumed1

us-gaap:NoncashOrPartNoncashAcquisitionInvestmentsAcquired1

us-gaap:NoncashOrPartNoncashAcquisitionOtherAssetsAcquired1

us-gaap:NoncashOrPartNoncashAcquisitionOtherLiabilitiesAssumed1

us-gaap:NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1

us-gaap:NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1

us-gaap:NoninterestExpense

us-gaap:NoninterestIncome

us-gaap:NoninterestIncomeOtherOperatingIncome

us-gaap:OccupancyNet

us-gaap:OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveLossHeldToMaturitySecurityAdjustmentFromAociForAccretionOfNoncreditPortionOfOttiAfterTax

us-gaap:OtherNoninterestExpense

us-gaap:PaymentsForOriginationOfMortgageLoansHeldForSale

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireFederalReserveStock

us-gaap:PaymentsToAcquireHeldToMaturitySecurities

us-gaap:PaymentsToAcquireLoansHeldForInvestment

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities

us-gaap:ProceedsFromRepaymentsOfOtherDebt

us-gaap:ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfFederalReserveStock

us-gaap:ProceedsFromSaleOfForeclosedAssets

us-gaap:ProceedsFromSaleOfHeldToMaturitySecurities

us-gaap:ProceedsFromSaleOfMortgageLoansHeldForSale
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty
us-gaap:ProceedsFromSaleOfOtherLoansHeldForSale

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProfessionalFees

us-gaap:ProvisionForLoanAndLeaseLosses

us-gaap:ProvisionForLoanLossesExpensed
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:RestrictedStockExpense

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:StatementScenario, us-gaap:DisposalGroupClassification, us-gaap:SubsequentEventType
us-gaap:SaleAndLeasebackTransactionGainLossNet

us-gaap:ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate

us-gaap:ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice

us-gaap:ShortTermLeaseCost

us-gaap:StockIssued1

us-gaap:StockIssuedDuringPeriodValueAcquisitions
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationForfeited

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:StockOptionPlanExpense

us-gaap:SubleaseIncome

us-gaap:TreasuryStockAcquiredAverageCostPerShare

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:UnrealizedGainLossOnDerivatives

us-gaap:VariableLeaseCost

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

isbc:AmortizedCostBasisOfHedgedItem

isbc:BankOwnedLifeInsuranceCarryingValueConsistsOfCashSurrenderValue

isbc:BorrowedFundsOther

isbc:BorrowedFundsOtherWeightedAverageInterestRate

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearAfterFive

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearFour

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearOne

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearThree

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearTwo
dei:LegalEntity, us-gaap:StatementScenario, us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
isbc:BusinessCombinationCashConversionRatioPerShare
us-gaap:BusinessAcquisition
isbc:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeposits
us-gaap:Range, us-gaap:FairValueByMeasurementFrequency, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
isbc:CollateralDependantLoansMeasurementInput

isbc:CollateralDependantLoansReceivable
us-gaap:Collateral, us-gaap:FinancialInstrument
us-gaap:Collateral, us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancialInstrument
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique
us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:FinancialInstrument
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

isbc:CollateralDependentLoansReceivable
us-gaap:Collateral, us-gaap:FinancialInstrument
us-gaap:Collateral, us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancialInstrument
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:FinancialInstrument
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

isbc:CumulativeBasisAdjustmentOfHedgedItem

isbc:DebtSecuritiesHeldToMaturityNetOfAllowanceForCreditLosses
us-gaap:ConsolidatedEntities

isbc:DebtSecuritiesHeldToMaturitySecuritiesRestrictedFairValue

isbc:DeferredFeesPremiumsAndOtherNet

isbc:DeferredFeesPremiumsandOtherNet

isbc:DeferredTaxAssetFairValueAdjustmentsRelatedToAcquisition

isbc:DeferredTaxAssetsTaxDeferredExpenseLoanOriginationFees

isbc:DepositsCertificateofDepositsPurchasedThroughBroker

isbc:DepositsCheckingAccount
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
isbc:DepositsExcludingTimeDepositsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

isbc:DepositsMoneyMarketDepositsPurchasedThroughBroker

isbc:FinancingReceivableLoansHeldForSale

isbc:FinancingReceivableLoansHeldForSaleExcludingAccruedInterest

isbc:FinancingReceivableModificationsRecordedInvestmentNonAccrual
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

isbc:FinancingReceivableModificationsRecordedInvestmentStillAccruing
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

isbc:FiniteIntangibleAssetsValuationAllowance
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

isbc:HedgedAssetFairValueHedgeCumulativeIncreaseDecreaseUnamortizedPortion

isbc:HeldToMaturityAccruedInterestReceivable

isbc:HeldtomaturityAccruedInterestReceivable

isbc:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour

isbc:LoansDeferred

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us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableRecordedInvestmentCurrent
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancingReceivableRecordedInvestmentPastDue
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableRevolving
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:HedgedAssetFairValueHedge

us-gaap:HedgedAssetFairValueHedgeCumulativeIncreaseDecrease
us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecurities
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue
us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount
us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue
us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount
us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue
us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount
us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue
us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount

us-gaap:HeldToMaturitySecuritiesFairValue
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis
us-gaap:FinancialInstrument
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesRestricted
us-gaap:SubsequentEventType
us-gaap:ImpairedFinancingReceivableRelatedAllowance
us-gaap:SubsequentEventType
us-gaap:ImpairedFinancingReceivableUnpaidPrincipalBalance

us-gaap:InterestBearingDomesticDepositCertificatesOfDeposits
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:InterestRateDerivativeLiabilitiesAtFairValue

us-gaap:InterestReceivable
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:InvestmentInFederalHomeLoanBankStockFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LettersOfCreditOutstandingAmount
us-gaap:LineOfCreditFacility
us-gaap:CreditFacility
us-gaap:LineOfCredit
us-gaap:LineOfCreditFacility
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:LoansHeldForSaleFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:LoansReceivableFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:BusinessAcquisition
us-gaap:MortgageLoansOnRealEstateCommercialAndConsumerNet

us-gaap:NoninterestBearingDomesticDepositChecking

us-gaap:NotesReceivableGross

us-gaap:NotesReceivableNet

us-gaap:OffBalanceSheetCreditLossLiability

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OtherLiabilities

us-gaap:OtherLongTermDebt
us-gaap:FinancialInstrument
us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

us-gaap:PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForRepurchaseAgreements
us-gaap:FinancialInstrument

us-gaap:QualifiedAffordableHousingProjectInvestmentsCommitment

us-gaap:RealEstateAcquiredThroughForeclosure
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:SaleLeasebackTransactionNetBookValue

us-gaap:SecuritiesSoldUnderAgreementsToRepurchase

us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral
us-gaap:FinancialInstrument

us-gaap:ServicingAssetAtFairValueAmount
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique
us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique
us-gaap:MeasurementInputType
us-gaap:ServicingAssetMeasurementInput
us-gaap:Range, us-gaap:FairValueByMeasurementFrequency, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
us-gaap:Range, us-gaap:MeasurementInputType
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SubordinatedDebt
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapital
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalized
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapitalToAverageAssets
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapitalRequiredToBeWellCapitalized

us-gaap:TimeDepositMaturitiesAfterYearFive

us-gaap:TimeDepositMaturitiesYearFour

us-gaap:TimeDepositMaturitiesYearThree

us-gaap:TimeDepositMaturitiesYearTwo

us-gaap:TimeDeposits

us-gaap:TimeDeposits100000OrMore

us-gaap:UnearnedESOPShares

us-gaap:WeightedAverageRateDomesticDeposit

us-gaap:WeightedAverageRateDomesticDepositCertificatesOfDeposit

us-gaap:WeightedAverageRateDomesticDepositChecking

us-gaap:WeightedAverageRateDomesticDepositMoneyMarket

us-gaap:WeightedAverageRateDomesticDepositSavings

Plots across concepts


IncomeStatement
Revenue From Contract With Customer Excluding Assessed Tax
Expenses
General And Administrative Expense
Balance Sheet
Finite Lived Intangible Assets Net
Assets
Property Plant And Equipment Net
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Finite Lived Intangible Assets Net
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Other Liabilities
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Payments For Repurchase Of Common Stock
Shares
Weighted Average Number Of Shares Outstanding Basic
DividendsAndRepurchase
Payments For Repurchase Of Common Stock
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net
BanksAndOrInsurance
Interest And Dividend Income Operating
LiabilitiesBanks
Deposits

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:CommonStockValue █████████████████████████████▁▁3.6193.6193.6193.6193.6193.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5893.5820.6030.596NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁236.497536235.379381NA236.872505236.382103233.632841NA261.81297263.477477268.26973NA281.172921285.733542289.131916NA290.890307293.130285293.407422NA294.174812301.509608312.154256NA327.193519336.452548347.470957NA346.773543347.980539348.116488NA278.861914277.842685277.109479
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁235.045023234.661847NA236.833099236.248296233.26286NA261.678994263.035892267.664063NA280.755898284.502818287.685531NA289.715414291.127119291.185408NA292.000061298.417609309.16668NA324.065364333.277572344.237371NA343.493691344.455224343.943811NA275.229343274.712968274.124936
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:StockCompensationPlan▁█0.0124374.27403NA7.5042277.4429065.798379NA8.1423710.74954910.278975NA10.0592479.9716449.673423NA10.95274411.24540610.861826NA16.37252311.58568411.667654NA11.60428418.4542390.028203NA0.0287130.10.651321NA0.4957710.00.0255
us-gaap:EarningsPerShareBasic █▇█▇▅▅▅▅▅▅▄▅▅▅▁▄▄▄▅▄▄▄▄▄▄▄▄▄▂▃▃▄▃▃0.340.310.320.270.180.170.190.20.180.180.120.190.20.2-0.020.160.140.160.180.150.150.140.140.150.140.120.130.110.040.10.090000000000000020.110.10.1
us-gaap:EarningsPerShareDiluted █▇█▇▅▅▅▅▅▅▄▅▅▅▁▄▄▄▅▄▄▄▄▄▄▄▄▄▂▃▃▄▃▃0.340.310.320.270.180.170.190.20.180.180.120.190.20.2-0.020.160.140.160.180.150.150.140.140.150.140.120.120.110.040.10.100000000000000030.110.10.1
 us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities srt:ParentCompanyNANA1.307e-05NANANA1.278e-07NANANA1.4710000000000001e-07NANANA1.567e-07NANANANANANANANANANANANANANANANANANANA
 us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities srt:SubsidiariesNANA1.1720000000000001e-05NANANA1.103e-07NANANA1.341e-07NANANA1.394e-07NANANANANANANANANANANANANANANANANANANA
 us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities srt:ParentCompanyNANA1.4390000000000001e-05NANANA1.392e-07NANANA1.59e-07NANANA1.685e-07NANANANANANANANANANANANANANANANANANANA
 us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities srt:SubsidiariesNANA1.2970000000000001e-05NANANA1.2180000000000002e-07NANANA1.4599999999999998e-07NANANA1.5129999999999999e-07NANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:AllocatedShareBasedCompensationExpense ▃▃▃▃▃▃▃▄▄▃▄▄▄▃▄▄▄▄▅▄▄▃▃▃▁▁▁▁█▁▁▁▁▁3.7073.463.4423.483.9543.8894.0916.3114.9864.5734.6394.6645.683.375.5754.945.174.8576.8195.4625.3614.3334.3714.4930.3510.0040.0030.01112.90.7630.7220.8950.8670.885
us-gaap:ComprehensiveIncomeNetOfTax ▇█▇▇▄▂▅▅▄▅▆▅▆▅▁▅▄▅▅▅▅▅▄▅▅▅▄▄▃▄▄▄▃▃73.94895.78486.19772.4834.7616.74851.00349.48838.88849.05262.87852.64757.29748.13-14.20847.37838.96249.87351.45342.02448.28553.58734.46351.22241.51547.82340.71937.46119.08137.75425.72130.71712.44925.055
us-gaap:GainsLossesOnExtinguishmentOfDebt NANA-22.807-0.965NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ▃▁▂▃▄▃▃▂▅▂▄▃▅▂▆▅▇▅▅▄█▆0.5450.3790.4550.5510.5930.5340.5590.4870.6920.4840.6260.5090.6930.50.7630.6910.8420.7340.7240.6410.9490.817NANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest █▇▆▆▃▂▅▄▃▄▁▄▅▅▄▄▃109.03699.34994.40189.15258.82954.15980.9173.01465.34567.46342.78973.42576.19578.00968.93574.28264.108NANANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▃▃▂▃▂▂▃▂▂▂▁▂▂▂█▃▃▃▃▃▃▃▃▂▃▃▂▂▁▂▂▂▂▂29.22927.07419.25624.8416.21814.64732.1821.04218.72119.3059.45919.20119.09820.08473.68928.43724.47527.24430.98928.28728.4127.49824.44822.86526.93925.11921.54723.0929.59620.51617.08916.05315.52415.089
us-gaap:IncomeTaxesPaid ▄▃█▂▁▁▁▃▂▁▂▃▄▁▄▄▅▁▄▅▁▄▂▄▃▄▃▂▅▁▃▃▄▂30.22517.875.9326.33.1183.1-0.07422.3969.9033.92111.4126.82531.0360.031.82530.439.7230.033.25147.8194.87331.1845.49634.53320.66327.47726.1812.76645.4151.43523.99520.73532.9086.28
us-gaap:InterestAndFeeIncomeLoansAndLeases ▇▆▇▇▇█████▇▇▇▆▆▆▆▅▅▅▅▄▄▄▄▃▃▃▃▃▂▁▁▁211.523198.75213.928215.221217.733224.529228.005231.734227.462224.89221.566216.516211.791204.722204.017201.069192.891185.961187.912179.234175.922172.832169.641169.216165.515159.052155.539152.397149.531145.97134.94127.186122.636119.86
us-gaap:InterestExpense ▂▂▃▄▅▆▇██▇▇▆▅▄▄▄▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁37.14139.80949.08659.07964.22782.81691.605100.10299.993.53985.11577.167.10159.08355.62754.85348.45242.97539.36938.76837.65537.54437.32235.62332.97730.71830.91929.21329.32629.43527.79126.97327.48527.393
us-gaap:InterestIncomeExpenseNet █▇█▇▇▆▆▆▅▆▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▄▄▄▃▃▂▂▁▁194.71180.735188.794181.622181.987173.283168.775164.452159.168162.678169.306166.926171.301172.484174.69170.911167.056167.119168.71159.606157.305154.563150.816151.274148.552144.441140.171137.845134.763129.19118.252110.424104.709102.041
us-gaap:InterestPaidNet ▁▁▃▃▅▆▇██▇▆▅▄▃▃▃39.3739.83855.39558.51970.64583.72595.69101.59897.95795.11479.52573.48765.49157.02254.75653.929NANANANANANANANANANANANANANANANANANA
us-gaap:MarketingAndAdvertisingExpense ▃▃▄▃▃▃▄▄▇▆▇▅▆▂▆██▂▄▁▃▁▃▅▄▃▅▅▅▃▃▂▃▂2.3972.2292.6452.3442.1992.3633.0052.9944.2823.6123.9313.2293.8072.0873.4554.3554.5162.0853.0041.4952.4511.6942.4563.262.7372.5353.2373.0463.3852.5692.3682.0232.3971.814
us-gaap:NetIncomeLoss █▇█▇▅▅▅▆▅▅▄▆▆▆▁▅▅▅▆▅▅▅▅▅▅▅▅▅▃▄▄▄▄▄79.80772.27575.14564.31242.61139.51248.7351.97246.62448.15833.3354.22457.09757.925-4.75445.84539.63346.0252.46543.44144.35543.62644.40248.79446.36241.94743.07539.04115.18634.41827.50729.28128.07627.167
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ██▆▅▁▅▅▄▄▂▃▂▃▁8.3638.1717.2096.8134.8736.9696.9896.5676.2385.5065.7245.3335.7684.891NANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:Assets █▇▇███████▇▇▇▇▇▇▆▆▆▅▅▄▄▄▄▃▃▂▂▁▁26802.11125822.88926023.15926606.97727194.14826677.54426698.76626725.16327064.11626545.6426229.00825518.49525364.89225225.67725129.24424782.00324316.09623888.67323174.67522535.97721718.29821189.9720888.68420331.32620037.41619365.40718773.63917833.29817456.8116426.30915623.07NANANA
us-gaap:Liabilities █▇▇████▇█▇▇▇▆▆▆▆▆▅▅▅▄▄▃▃▃▂▂▁▁▂▁23988.08423052.33723313.15623937.2224571.24824082.78624076.81623793.79624137.24123589.8123223.67822483.27422273.90922133.59622003.79321626.87121161.17720730.18120051.4319420.88818586.04617974.24317577.03716969.14216628.96215807.38715195.78414285.14413937.85715030.55214288.743NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇███████▇▇▇▇▇▇▆▆▆▅▅▄▄▄▄▃▃▂▂▁▁26802.11125822.88926023.15926606.97727194.14826677.54426698.76626725.16327064.11626545.6426229.00825518.49525364.89225225.67725129.24424782.00324316.09623888.67323174.67522535.97721718.29821189.9720888.68420331.32620037.41619365.40718773.63917833.29817456.8116426.30915623.07NANANA
us-gaap:StockholdersEquity ▆▆▆▅▅▅▅▆▆▆▆▆▇▇▇▇▇▇▇▇▇▇▇▇█████▂▂▁▁▁2814.0272770.5522710.0032669.7572622.92594.7582621.952931.3672926.8752955.833005.333035.2213090.9833092.0813125.4513155.1323154.9193158.4923123.2453115.0893132.2523215.7273311.6473362.1843408.4543558.023577.8553548.1543518.9531395.7571334.3271126.6481096.1331086.708
 us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities srt:ParentCompanyNANA2674.59NANANA2553.447NANANA2925.743NANANA3072.783NANANANANANANANANANANANANANANANANANANA
 us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities srt:SubsidiariesNANA2391.126NANANA2197.188NANANA2660.183NANANA2732.757NANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:CashAndCashEquivalentsAtCarryingValue █▂▂▆█▇▂▂▂▂▂▂▂▁▆▄▂▁▁▂▁▁▁▁▂▂▂▂▃▂▂▂▁▁770.396173.273170.432557.749735.234672.02174.915195.4254.382186.083196.891210.595195.995153.439618.394413.322213.907165.914164.178168.629148.322143.669148.904161.613228.967229.074230.961238.166301.391235.84250.689168.329155.481119.729
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents █▁▁▆█▇▁▁▂▁▁▂▁▁▆770.396173.273170.432557.749735.234672.02174.915195.4254.382186.083196.891210.595195.995153.439618.394NANANA164.178NANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:PropertyPlantAndEquipmentGross NANA297.279NANANA331.381NANANA332.031NANANA315.245NANANA295.51NANANA277.47NANANA253.068NANANA209.994NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType srt:OfficeBuildingNANA44.895NANANA70.887NANANA73.96NANANA83.659NANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ConstructionInProgressNANA6.992NANANA3.192NANANA3.786NANANA6.567NANANA13.07NANANA12.075NANANA17.121NANANA24.299NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixturesNANA109.909NANANA108.125NANANA105.118NANANA92.65NANANA83.246NANANA77.096NANANA68.42NANANA54.61NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandNANA10.731NANANA18.048NANANA18.364NANANA19.884NANANA20.006NANANA20.569NANANA21.862NANANA12.728NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNANA124.752NANANA131.129NANANA130.803NANANA112.485NANANA95.489NANANA79.898NANANA66.857NANANA44.587NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA157.616NANANA161.767NANANA154.599NANANA135.014NANANA118.093NANANA104.951NANANA92.169NANANA71.889NANANA
us-gaap:AmortizationOfIntangibleAssets ▁▁▂▂▂▁▁▃▂▂▃▃▃▄▄▄▅▅▅▅▆▆▆▇▇▇▇███▃▄▄▄0.2870.2510.3940.3970.3940.2860.30.4280.3930.3990.460.4940.5070.5130.5730.6080.620.6260.6870.7070.7470.740.8030.8390.8510.8570.9180.9530.9640.9710.4950.530.5420.548
us-gaap:PropertyPlantAndEquipmentNet ▁▁▂▆▆▆▆▇▇██▇▇███████▇▇▇▆▆▆▅▅▄▃▂134.579136.893139.663164.22165.609167.2169.614171.266174.663177.465177.432175.387176.546177.368180.231177.569178.071179.196177.417178.623176.006173.609172.519168.458167.588164.637160.899157.452151.722145.526138.105NANANA
 us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities srt:ParentCompanyNANA2426.386NANANA2265.69NANANA2739.77NANANA2800.867NANANANANANANANANANANANANANANANANANANA
us-gaap:Goodwill █████▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁94.53594.53594.594.53594.53582.54682.582.54682.54682.54682.582.54682.54682.52677.677.57177.57177.57177.57177.57177.57177.57177.677.57177.677.677.677.677.677.677.6NANANA
us-gaap:FiniteLivedIntangibleAssetsNet ▁▁▁▁▁▁▁▁▁▂▂▂▂▃▃▄▄▅▅▅▆▆▆▇▆▆▇▇███14.68715.64515.09815.53314.64315.08915.32315.0215.45116.00516.51717.21818.07519.08320.09421.99623.07723.90424.26825.25426.40427.38927.7429.26827.69228.10629.13430.20331.1832.31731.558NANANA
us-gaap:IntangibleAssetsNetIncludingGoodwill ▇███▇▁▁▁▁▂▂▂▃▃▁▂▃▃▃▄▅▅▅▆109.222110.18109.633110.068109.17897.63597.86997.56697.99798.55199.06399.764100.621101.60997.66599.567100.648101.475101.839102.825103.975104.96105.311106.839NANA106.705NANANANANANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet NANA116.805NANANA64.22NANANA104.411NANA130.25121.663222.573217.398216.183222.277228.902220.141219.458237.367227.451239.411226.43231.898222.861218.718210.709216.206NANANA
us-gaap:OperatingLeaseRightOfUseAsset █▇█▁▁▁▂▃▄▅200.425195.13199.981171.781172.432170.549175.143179.632184.215187.56NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EquitySecuritiesFvNi ▂▆█▂▁▁▁▁▁▁▁▁▁9.69825.72736.08.7036.196.146.0396.035.9755.95.85.95.753NA5.701NANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:TimeDepositMaturitiesYearOne NANA2386.85NANANA3627.229NANANA3724.359NANANA2841.219NANANA1866.0NANANA2586.076NANANA1450.655NANANA2170.493NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:DebtAndCapitalLeaseObligations ▄▃▃▅▅▇█▇█▇▇▆▆▇▅▅▆▆▅▄▄▃▃▃▃▂▂▁▁4033.8643558.3243295.794307.5234632.0165466.6635827.1115694.5536083.7375549.5875435.6814853.7745144.9875361.264461.5334484.8694882.335093.794546.2514203.7113894.1713527.633263.093358.5533446.1213161.6132766.1042536.5942429.085NA3367.274NANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo █▆▇▂▁▂▁27.93726.53427.44824.41223.58923.98823.888NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree █▆▆▂▁▁▁27.91226.49226.35423.31222.48622.3922.27NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour █▆▇▃▂▁▁27.26725.84226.323.25222.4421.34721.227NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA25.496NANA21.28221.162NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA104.729NANA100.802100.662NANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:StockholdersEquity ▆▆▆▅▅▅▅▆▆▆▆▆▇▇▇▇▇▇▇▇▇▇▇▇█████▂▂▁▁▁2814.0272770.5522710.0032669.7572622.92594.7582621.952931.3672926.8752955.833005.333035.2213090.9833092.0813125.4513155.1323154.9193158.4923123.2453115.0893132.2523215.7273311.6473362.1843408.4543558.023577.8553548.1543518.9531395.7571334.3271126.6481096.1331086.708
us-gaap:CommonStockValue █████████████████████████████▁▁3.6193.6193.6193.6193.6193.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5893.5820.6030.596NANANA
us-gaap:AdditionalPaidInCapital █████████████████████████████▁▁2864.5592860.0452858.6632854.8442851.3062826.2882822.3642817.6682809.8512810.8322805.4232800.3522794.5072789.1022784.392776.9712770.8812763.2172765.7322780.3122788.7962785.7022785.5032779.1752775.4792862.442863.1082861.5972856.902749.042721.689NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ██▇▇▆▆▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▃▃▃▂▂▂▂▁▁▁1422.0291376.7741339.0031293.841259.6051247.0281245.7931227.2941206.8731191.021173.8971172.6151145.1291115.1531084.1771111.8561090.4671075.9091053.751009.727984.958959.79936.04908.74877.211842.772836.639807.879783.123762.266734.563NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▆▇▄▂▁▂▇▆▇██▄▄▄▅▇▆▆▆▇▇▇▅▇▆▇▆▇▇▆▆▆▆█-22.366-16.507-40.016-51.068-59.236-51.386-18.622-20.895-18.411-10.675-11.569-41.117-39.54-39.74-29.339-19.885-21.418-20.747-24.6-15.351-13.934-17.864-27.825-17.886-21.375-16.528-22.404-20.046-18.465-22.36-25.696-23.91-25.346-9.719
us-gaap:TreasuryStockValue ███████▆▆▆▅▅▅▄▄▄▄▄▄▄▄▃▂▂▂▁▁▁▁▁▁1380.0421378.8581375.9961355.4591355.6261353.2461352.911017.276995.265958.425884.75818.209729.944692.516633.11632.394602.846576.973587.974575.187542.407425.991295.412223.04136.87243.49111.13111.59211.59264.3767.046NANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▁▆▅▅▅▅█▅▄▅3.7073.463.4433.4793.9543.8964.0936.3094.9934.5734.6394.6655.7633.375.5754.945.174.8576.8195.4615.3624.333-14.0684.4930.3510.0040.0040.01512.9240.758-1.8180.951NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▅▃▅▄▁▃▃▃▂▃▄▃▄▃▃▃▄▃▃▄▃▃█▃▃▃▃▃▄▂▄▃▃79.63186.90761.126153.62477.2-67.65373.76940.03530.29816.55242.61779.96369.44683.54971.9567.31144.124119.02566.83831.25382.73746.30868.925328.88568.5166.81437.10960.58672.999106.6949.16776.8335.77554.322
us-gaap:NetCashProvidedByUsedInInvestingActivities ▄▆▆▇▆█▅▇▄▅▂▅▅▃▄▄▄▂▂▂▃▄▃▂▂▃▁▃▁▃▅▃▃▄-358.395103.716244.115390.36584.13604.68-21.634292.674-413.687-104.827-720.765-154.533-103.68-574.785-276.253-262.703-387.955-760.387-674.285-784.993-522.6-316.068-582.006-730.395-669.735-602.986-944.144-457.755-981.838-553.007-134.476-441.137-495.454-190.255
us-gaap:NetCashProvidedByUsedInFinancingActivities █▃▁▁▄▄▄▂▆▄▇▄▄▄▆▆▆▇▆▇▆▅▆▅▆▆█▅█▆▅▆▆▄875.888-287.782-692.558-721.474-98.116-39.922-72.62-391.691451.68877.467664.44489.1776.7926.281409.375394.807391.824643.098602.996774.047444.516264.525500.372334.156601.118534.285899.83333.944974.39431.464207.669377.155495.431100.509
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect █▄▂▃▄▇▄▄▅▄▄▄▄▁597.1232.841-387.317-177.48563.214497.105-20.485-58.98268.299-10.808-13.70414.642.556-464.955NANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit ▁▂▂▁▁▂▄▂▂▂▃▂▂▂█▂▂▂▃▁▂▃▂▂▁▂▁▂▁▃▁▂▂▂-11.9484.171-4.515-12.772-16.074-0.82943.103-0.893-0.2233.63722.659-3.586-2.181-1.379103.1-6.217-0.5293.65411.243-7.873-3.15211.422-3.2388.134-9.7321.656-7.892-2.008-10.04510.159-8.51-7.297-4.478-0.533
us-gaap:DepreciationDepletionAndAmortization ██▇████▇▆▆▄▆▆▆▇▆▅▅▆▅▅▅▅▅▄▃▅▄▃▃▂▁▁▁5.2955.5025.225.4595.3925.2795.4044.8194.6894.6673.4914.5584.4864.5694.7514.3874.1994.0844.4584.0753.9013.7563.9113.8093.412.83.7283.6673.042.7162.5022.0632.0391.936
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▅▃▅▄▁▃▃▃▂▃▄▃▄▃▃▃▄▃▃▄▃▃█▃▃▃▃▃▄▂▄▃▃79.63186.90761.126153.62477.2-67.65373.76940.03530.29816.55242.61779.96369.44683.54971.9567.31144.124119.02566.83831.25382.73746.30868.925328.88568.5166.81437.10960.58672.999106.6949.16776.8335.77554.322
us-gaap:NetIncomeLoss █▇█▇▅▅▅▆▅▅▄▆▆▆▁▅▅▅▆▅▅▅▅▅▅▅▅▅▃▄▄▄▄▄79.80772.27575.14564.31242.61139.51248.7351.97246.62448.15833.3354.22457.09757.925-4.75445.84539.63346.0252.46543.44144.35543.62644.40248.79446.36241.94743.07539.04115.18634.41827.50729.28128.07627.167
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▄▆▆▇▆█▅▇▄▅▂▅▅▃▄▄▄▂▂▂▃▄▃▂▂▃▁▃▁▃▅▃▃▄-358.395103.716244.115390.36584.13604.68-21.634292.674-413.687-104.827-720.765-154.533-103.68-574.785-276.253-262.703-387.955-760.387-674.285-784.993-522.6-316.068-582.006-730.395-669.735-602.986-944.144-457.755-981.838-553.007-134.476-441.137-495.454-190.255
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▂▆▃▃▂▃▁▁▄▅▃▃▁▆▃▂▅▃▆▅▄▇▄▅▅▆██▅▇▄▅▅2.9812.7327.5044.073.3162.8653.7521.4221.8874.75.5363.3993.6641.7067.4133.8853.0745.8633.2526.6926.2984.8467.9724.6796.3616.5387.1759.3979.2365.8477.9854.4985.8746.187
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities █▃▁▁▄▄▄▂▆▄▇▄▄▄▆▆▆▇▆▇▆▅▆▅▆▆█▅█▆▅▆▆▄875.888-287.782-692.558-721.474-98.116-39.922-72.62-391.691451.68877.467664.44489.1776.7926.281409.375394.807391.824643.098602.996774.047444.516264.525500.372334.156601.118534.285899.83333.944974.39431.464207.669377.155495.431100.509
us-gaap:PaymentsOfDividends ██▇▇▇▇▇▇▇▇▇▆▆▆▆▅▅▅▅▄▄▄▄▄▄█▃▃▁▁▁▁▁▁34.61334.63429.97429.98730.02129.69330.22830.29830.64630.99132.0226.727.127.36627.49224.41824.85424.78624.68418.62719.17519.80516.9217.26517.39635.81414.31714.2846.9816.9735.6155.5955.5985.596
us-gaap:PaymentsForRepurchaseOfCommonStock ▁▁▁▁▁▁█▁▂▃▂▃▂▂▁▂▂▁▂▃▄▄▃▃▅▂▁▁▁▁▁▁▁▁4.3437.61520.5020.0572.4290.932335.70522.48644.02373.73267.17287.98341.16161.8591.24833.21124.570.06125.92373.703123.592140.19278.6889.172180.36134.709-0.0010.011.5911.9330.1550.00.01.376
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3619000.03619000.03619000.03619000.03619000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03589000.03582000.0603000.0596000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value236235236236233261263268281285289290293293294301312327336347346347348278277277
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value235234236236233261263267280284287289291291292298309324333344343344343275274274
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:StockCompensationPlan


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value0.0124374.274037.5042277.4429065.7983798.142371010109.9716449.67342310111016111111180.0282030.0287130.10.6513210.4957710.00.0255
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.340.310.320.270.180.170.190.20.180.180.120.190.20.2-0.020.160.140.160.180.150.150.140.140.150.140.120.130.110.040.10.090.110.10.1
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.340.310.320.270.180.170.190.20.180.180.120.190.20.2-0.020.160.140.160.180.150.150.140.140.150.140.120.120.110.040.10.10.110.10.1
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Tier One Risk Based Capital To Risk Weighted Assets

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets

srt:ParentCompany


Tier
Period End2020-12-312019-12-312018-12-312017-12-31
Value13.070.12780.14710.1567
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets100.0100.0100.0100.0

srt:Subsidiaries


Tier
Period End2020-12-312019-12-312018-12-312017-12-31
Value11.720.11030.13410.1394
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets89.786.391.289.0

Capital To Risk Weighted Assets

us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:CapitalToRiskWeightedAssets

srt:ParentCompany


Capital
Period End2020-12-312019-12-312018-12-312017-12-31
Value14.390.13920.1590.1685
Percentage of CapitalToRiskWeightedAssets100.0100.0100.0100.0

srt:Subsidiaries


Capital
Period End2020-12-312019-12-312018-12-312017-12-31
Value12.970.12180.1460.1513
Percentage of CapitalToRiskWeightedAssets90.187.591.889.8

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3.7073.463.4423.483.9543.8894.0916.3114.9864.5734.6394.6645.683.375.5754.945.174.8576.8195.4625.3614.3334.3714.4930.3510.0040.0030.011120.7630.7220.8950.8670.885
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating1.61.61.41.41.61.51.62.41.91.81.81.92.41.52.42.22.42.33.32.82.72.32.32.40.20.00.00.07.90.50.50.70.70.7

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value73958672346.7485149384962525748-14.20847384951424853345141474037193725301225
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating31.943.436.230.114.12.619.618.715.019.124.721.624.020.8-6.221.018.123.724.721.224.827.918.327.422.927.323.822.411.623.817.622.49.419.4

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2020-12-312020-09-30
Value-22.807-0.965
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.0
Percentage of InterestAndDividendIncomeOperating-9.6-0.4

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value545000.0379000.0455000.0551000.0593000.0534000.0559000.0487000.0692000.0484000.0626000.0509000.0693000.0500000.0763000.0691000.0842000.0734000.0724000.0641000.0949000.0817000.0
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.20.20.20.20.20.20.20.20.30.20.20.20.30.20.30.30.40.30.30.30.50.4

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value10999948958548073656742737678687464
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating47.045.039.737.023.921.131.127.625.226.316.830.132.033.729.932.929.7

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value109.789289.7496.3912.0980.982-0.5113.96-2.09231-0.693-0.4770.4981.0281.2671.351-0.30.6470.507-0.267-0.8523.197-1.1860.3510.3520.0080.1820.18-0.046-0.6640.2390.239-0.445
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest9.89.930.310.910.93.91.2-0.76.1-3.174.4-0.9-0.60.61.51.72.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating4.64.412.04.12.60.80.4-0.21.5-0.812.5-0.3-0.20.20.40.60.6-0.10.30.3-0.1-0.41.7-0.60.20.20.00.10.1-0.0-0.50.20.2-0.3
Percentage of InterestAndDividendIncomeOperating us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value292719241614322118199.45919192073282427302828272422262521239.5962017161515
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating12.612.38.110.36.65.712.48.07.27.53.77.98.08.732.012.611.413.014.914.314.614.313.012.214.814.312.613.85.812.911.711.711.711.7

us-gaap:IncomeTaxExpenseBenefit us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2.8522.6776.7992.7161.7620.5670.178-0.1470.973-0.5998.398-0.181-0.120.128-2.10.4970.526-0.1331.4270.19-0.103-0.3360.5440.1440.1440.144-0.3360.0730.075-0.02-0.2710.0980.097-0.181
Percentage of IncomeTaxExpenseBenefit9.89.935.310.910.93.90.6-0.75.2-3.188.8-0.9-0.60.6-2.81.72.1-0.54.60.7-0.4-1.22.20.60.50.6-1.60.30.8-0.1-1.60.60.6-1.2
Percentage of InterestAndDividendIncomeOperating1.21.22.91.10.70.20.1-0.10.4-0.23.3-0.1-0.10.1-0.90.20.2-0.10.70.1-0.1-0.20.30.10.10.1-0.20.00.0-0.0-0.20.10.1-0.1
Percentage of InterestAndDividendIncomeOperating us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3017756.33.1183.1-0.074229.9033.9211126310.03130390.033474.873315.4963420272612451.4352320326.28
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating13.08.131.92.61.31.2-0.08.53.81.54.511.013.00.013.813.518.40.016.024.12.516.22.918.511.415.715.37.627.70.916.415.124.94.9

Interest And Fee Income Loans And Leases

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestAndFeeIncomeLoansAndLeases


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value211198213215217224228231227224221216211204204201192185187179175172169169165159155152149145134127122119
Percentage of InterestAndFeeIncomeLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating91.290.189.989.488.487.787.687.687.887.887.188.788.888.488.689.189.588.590.390.490.290.090.290.591.290.890.991.291.192.092.492.692.892.6

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value373949596482911009993857767595554484239383737373532303029292927262727
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating16.018.120.624.526.132.335.237.838.636.533.531.628.125.524.224.322.520.518.919.519.319.519.819.118.217.518.117.517.918.619.019.620.821.2

us-gaap:InterestExpense us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Interest
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value-9.45-6.092-2.090.5091.7282.090.822-0.606-0.369-1.1471.279
Percentage of InterestExpense-16.0-9.5-2.50.51.72.21.1-0.9-0.6-2.12.6
Percentage of InterestAndDividendIncomeOperating-3.9-2.5-0.80.20.70.80.3-0.3-0.2-0.50.6
Percentage of InterestAndDividendIncomeOperating us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.0

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value194180188181181173168164159162169166171172174170167167168159157154150151148144140137134129118110104102
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating84.081.979.475.573.967.764.862.261.463.566.568.471.974.575.875.777.579.581.180.580.780.580.280.981.882.581.982.582.181.481.080.479.278.8

us-gaap:InterestIncomeExpenseNet us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, us-gaap:InterestExpense, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterest


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value-10.468-10.019-6.628-2.089
Percentage of InterestIncomeExpenseNet-5.4-5.5-3.6-1.2
Percentage of InterestAndDividendIncomeOperating-4.5-4.5-2.7-0.8
Percentage of InterestAndDividendIncomeOperating us-gaap:InterestRateContract us-gaap:CashFlowHedging us-gaap:InterestExpense us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.0

us-gaap:InterestIncomeExpenseNet us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest


Interest
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-11.158-6.628-2.089-0.9280.5091.7282.09
Percentage of InterestIncomeExpenseNet-6.1-3.6-1.2-0.50.31.11.3
Percentage of InterestAndDividendIncomeOperating-4.6-2.7-0.8-0.40.20.70.8
Percentage of InterestAndDividendIncomeOperating us-gaap:InterestRateContract us-gaap:CashFlowHedging us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest0.00.00.00.00.00.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value393955587083951019795797365575453
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating17.018.123.324.328.732.736.838.437.837.131.330.127.524.623.823.9

Marketing And Advertising Expense

us-gaap:MarketingAndAdvertisingExpense

us-gaap:MarketingAndAdvertisingExpense


Marketing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2.3972.2292.6452.3442.1992.3633.0052.9944.2823.6123.9313.2293.8072.0873.4554.3554.5162.0853.0041.4952.4511.6942.4563.262.7372.5353.2373.0463.3852.5692.3682.0232.3971.814
Percentage of MarketingAndAdvertisingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating1.01.01.11.00.90.91.21.11.71.41.51.31.60.91.51.92.11.01.40.81.30.91.31.71.51.41.91.82.11.61.61.51.81.4

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value7972756442394851464833545757-4.75445394652434443444846414339153427292827
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating34.432.831.626.717.315.418.719.618.018.813.122.223.925.0-2.120.318.421.925.221.922.822.723.626.125.523.925.223.49.321.718.821.321.221.0

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value7.7867.112217.0334.6291.5310.804-0.3642.987-1.493-0.512-0.3570.370.770.825
Percentage of NetIncomeLoss9.89.829.010.910.93.91.6-0.76.4-3.1-0.9-0.60.61.72.1
Percentage of InterestAndDividendIncomeOperating3.43.29.22.91.90.60.3-0.11.2-0.6-0.2-0.10.20.30.4
Percentage of InterestAndDividendIncomeOperating us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value7972756442394851464833545757-4.754453946604344434448464143391534-57.35729
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0115.7100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-208.5100.0
Percentage of InterestAndDividendIncomeOperating34.432.831.626.717.315.418.719.618.018.813.122.223.925.0-2.120.318.421.929.221.922.822.723.626.125.523.925.223.49.321.7-39.321.3
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value8.3638.1717.2096.8134.8736.9696.9896.5676.2385.5065.7245.3335.7684.891
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating3.63.73.02.82.02.72.72.52.42.12.22.22.42.1

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IncomeStatementLocation

isbc:FeeandServiceCharges


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.7333.5983.5373.3692.9083.954.434.3373.733.2833.53.43.43.13.43.33.23.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax44.644.049.149.459.756.763.466.059.859.661.163.858.963.40.00.00.00.0
Percentage of InterestAndDividendIncomeOperating1.61.61.51.41.21.51.71.61.41.31.41.41.41.31.51.51.51.5
Percentage of InterestAndDividendIncomeOperating isbc:FeeandServiceCharges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIncome


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4.634.5733.6723.4441.9653.0192.5592.232.5082.2232.21.92.41.81.01.11.51.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax55.456.050.950.640.343.336.634.040.240.438.435.641.636.80.00.00.00.0
Percentage of InterestAndDividendIncomeOperating2.02.11.51.40.81.21.00.81.00.90.90.81.00.80.40.50.70.6
Percentage of InterestAndDividendIncomeOperating us-gaap:OtherIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value26802258222602326606271942667726698267252706426545262292551825364252252512924782243162388823174225352171821189208882033120037193651877317833174561642615623
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

srt:ParentCompany


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value2748262630183134
Percentage of Assets10.69.811.512.5
Percentage of Assets10.69.811.512.5
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value23988230522331323937245712408224076237932413723589232232248322273221332200321626211612073020051194201858617974175771696916628158071519514285139371503014288
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets89.589.389.690.090.490.390.289.089.288.988.588.187.887.787.687.387.086.886.586.285.684.884.183.583.081.680.980.179.891.591.5

us-gaap:Liabilities us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value384.773139.157
Percentage of Liabilities0.20.00.10.0
Percentage of Assets0.10.00.10.0
Percentage of Assets srt:ParentCompany1.40.20.40.3

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value26802258222602326606271942667726698267252706426545262292551825364252252512924782243162388823174225352171821189208882033120037193651877317833174561642615623
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-312018-12-312017-12-31
Value2748262630183134
Percentage of LiabilitiesAndStockholdersEquity10.69.811.512.5
Percentage of Assets10.69.811.512.5
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value28142770271026692622259426212931292629553005303530903092312531553154315831233115313232153311336234083558357735483518139513341126109610861066967
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.510.710.410.09.69.79.811.010.811.111.511.912.212.312.412.713.013.213.513.814.415.215.916.517.018.419.119.920.28.58.50.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value2710262130053125
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets10.49.811.512.4
Percentage of Assets srt:ParentCompany98.699.899.699.7

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

isbc:UnallocatedCommonStockHeldByEsop


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value-73.772-74.521-75.27-76.019-76.768-77.517-78.266-79.015-79.764-80.513-81.262-82.011-82.76-83.509-84.258-85.007-85.756-86.505-87.254-88.003-88.752-89.501-90.25-88.396-89.58-90.764-91.948-93.273-94.597-29.424-29.779-30.133-30.488-30.842-31.197-32.615
Percentage of StockholdersEquity-2.6-2.7-2.8-2.8-2.9-3.0-3.0-2.7-2.7-2.7-2.7-2.7-2.7-2.7-2.7-2.7-2.7-2.7-2.8-2.8-2.8-2.8-2.7-2.6-2.6-2.6-2.6-2.6-2.7-2.1-2.2-2.7-2.8-2.8-2.9-3.4
Percentage of Assets-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.5-0.5-0.5-0.5-0.2-0.20.00.00.00.00.0
Percentage of Assets isbc:UnallocatedCommonStockHeldByEsop0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value-9.242-9.364-9.485-6.071-6.371-6.67-6.69-2.978-2.991-3.005-3.018-5.332-5.434-5.537-5.64-4.646-4.728-4.812-4.895-11.414-11.731-12.049-12.366-10.911
Percentage of StockholdersEquity-0.3-0.3-0.3-0.2-0.2-0.3-0.3-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.1-0.1-0.2-0.2-0.4-0.4-0.4-0.4-0.3
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-38.441-35.945-77.742-99.264-108.506-101.021-30.373-41.602-32.038-3.0123713
Percentage of StockholdersEquity-1.4-1.3-2.9-3.7-4.1-3.9-1.2-1.4-1.1-0.10.41.20.4
Percentage of Assets-0.1-0.1-0.3-0.4-0.4-0.4-0.1-0.2-0.1-0.00.00.10.1
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value3438576466672934287.355-8.884-58.12-50.81-44.513-21.184-7.831-8.356-10.328-12.2711113101.3717.851
Percentage of StockholdersEquity1.21.42.12.42.52.61.11.21.00.2-0.3-1.9-1.6-1.4-0.7-0.2-0.3-0.3-0.40.40.40.30.00.2
Percentage of Assets0.10.10.20.20.20.30.10.10.10.0-0.0-0.2-0.2-0.2-0.1-0.0-0.0-0.0-0.10.10.10.00.00.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value-22.366-16.507-40.016-51.068-59.236-51.386-18.622-20.895-18.411-10.675-11.569-41.117-39.54-39.74-29.339-19.885-21.418-20.747-24.6-15.351-13.934-17.864-27.825-17.886-21.375-16.528-22.404-20.046-18.465-22.36-25.696-23.91-25.346-9.719-7.607-11.106
Percentage of StockholdersEquity-0.8-0.6-1.5-1.9-2.3-2.0-0.7-0.7-0.6-0.4-0.4-1.4-1.3-1.3-0.9-0.6-0.7-0.7-0.8-0.5-0.4-0.6-0.8-0.5-0.6-0.5-0.6-0.6-0.5-1.6-1.9-2.1-2.3-0.9-0.7-1.1
Percentage of Assets-0.1-0.1-0.2-0.2-0.2-0.2-0.1-0.1-0.1-0.0-0.0-0.2-0.2-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.20.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherThanTemporaryImpairment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value-9.437-9.63-9.809-9.988-10.172-10.449-10.629-10.808-11.036-11.217-11.397-13.835-14.051-14.266-14.482-12.1-12.286-12.471-12.87-13.052-13.367-13.559-13.75-14.816
Percentage of StockholdersEquity-0.3-0.3-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.5-0.5-0.5-0.5-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of Assets us-gaap:AccumulatedOtherThanTemporaryImpairment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value-0.123-0.153-0.184-0.226-0.274-0.33-0.386-0.449-0.49-0.808-0.921-1.045-1.194-1.353-1.52-1.408-1.588-1.78-1.988-2.233-2.513-2.796-3.08-4.528
Percentage of StockholdersEquity-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value28642860285828542851282628222817280928102805280027942789278427762770276327652780278827852785277927752862286328612856749721537535535533535
Percentage of StockholdersEquity101.8103.2105.5106.9108.7108.9107.696.196.095.193.392.390.490.289.188.087.887.588.689.389.086.684.182.781.480.580.080.781.253.754.147.748.949.350.055.4
Percentage of Assets10.711.111.010.710.510.610.610.510.410.610.711.011.011.111.111.211.411.611.912.312.813.113.313.713.914.815.316.016.44.64.60.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParent


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-77.742-30.37312137.424
Percentage of StockholdersEquity-2.9-1.20.40.40.2
Percentage of Assets-0.3-0.10.00.10.0
Percentage of Assets us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParent0.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value3.6193.6193.6193.6193.6193.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5893.5820.6030.5961.3561.3560.5320.5321.356
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.10.10.00.00.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value14221376133912931259124712451227120611911173117211451115108411111090107510531009984959936908877842836807783762734712688666644561
Percentage of StockholdersEquity50.549.749.448.548.048.147.541.941.240.339.138.637.036.134.735.234.634.133.732.431.429.828.327.025.723.723.422.822.354.655.163.362.961.360.558.0
Percentage of Assets5.35.35.14.94.64.74.74.64.54.54.54.64.54.44.34.54.54.54.54.54.54.54.54.54.44.44.54.54.54.64.70.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value-1380.042-1378.858-1375.996-1355.459-1355.626-1353.246-1352.91-1017.276-995.265-958.425-884.75-818.209-729.944-692.516-633.11-632.394-602.846-576.973-587.974-575.187-542.407-425.991-295.412-223.04-136.872-43.491-11.131-11.592-11.592-64.37-67.046-70.676-74.057-75.026-73.692-87.375
Percentage of StockholdersEquity-49.0-49.8-50.8-50.8-51.7-52.2-51.6-34.7-34.0-32.4-29.4-27.0-23.6-22.4-20.3-20.0-19.1-18.3-18.8-18.5-17.3-13.2-8.9-6.6-4.0-1.2-0.3-0.3-0.3-4.6-5.0-6.3-6.8-6.9-6.9-9.0
Percentage of Assets-5.1-5.3-5.3-5.1-5.0-5.1-5.1-3.8-3.7-3.6-3.4-3.2-2.9-2.7-2.5-2.6-2.5-2.4-2.5-2.6-2.5-2.0-1.4-1.1-0.7-0.2-0.1-0.1-0.1-0.4-0.40.00.00.00.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Tier One Risk Based Capital

us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities

us-gaap:TierOneRiskBasedCapital

srt:ParentCompany


Tier
Period End2020-12-312019-12-312018-12-312017-12-31
Value2674255329253072
Percentage of TierOneRiskBasedCapital100.0100.0100.0100.0
Percentage of Assets10.39.611.212.2
Percentage of Assets srt:ParentCompany97.397.296.998.0

srt:Subsidiaries


Tier
Period End2020-12-312019-12-312018-12-312017-12-31
Value2391219726602732
Percentage of TierOneRiskBasedCapital89.486.090.988.9
Percentage of Assets9.28.210.110.9
Percentage of Assets srt:Subsidiaries0.00.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value77017317055773567217419525418619621019515361841321316516416814814314816122822923023830123525016815511915590
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.90.70.72.12.72.50.70.70.90.70.80.80.80.62.51.70.90.70.70.70.70.70.70.81.11.21.21.31.71.41.60.00.00.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value144209145194195569
Percentage of CashAndCashEquivalentsAtCarryingValue85.1120.073.931.5118.8382.5
Percentage of Assets0.60.80.60.80.82.7
Percentage of Assets srt:ParentCompany5.38.04.86.20.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value770173170557735672174195254186196210195153618164
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.90.70.72.12.72.50.70.70.90.70.80.80.80.62.50.7

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value144209145194195
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents85.1120.073.931.5118.8
Percentage of Assets0.60.80.60.80.8
Percentage of Assets srt:ParentCompany5.38.04.86.20.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value297331332315295277253209
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.21.31.31.31.31.31.3

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

srt:OfficeBuilding


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value44707383
Percentage of PropertyPlantAndEquipmentGross15.121.422.326.5
Percentage of Assets0.20.30.30.3
Percentage of Assets srt:OfficeBuilding0.00.00.00.0

us-gaap:ConstructionInProgress


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6.9923.1923.7866.56713121724
Percentage of PropertyPlantAndEquipmentGross2.41.01.12.14.44.46.811.6
Percentage of Assets0.00.00.00.00.10.10.10.2
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1091081059283776854
Percentage of PropertyPlantAndEquipmentGross37.032.631.729.428.227.827.026.0
Percentage of Assets0.40.40.40.40.40.40.40.3
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.0

us-gaap:Land


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1018181920202112
Percentage of PropertyPlantAndEquipmentGross3.65.45.56.36.87.48.66.1
Percentage of Assets0.00.10.10.10.10.10.10.1
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value12413113011295796644
Percentage of PropertyPlantAndEquipmentGross42.039.639.435.732.328.826.421.2
Percentage of Assets0.50.50.50.40.40.40.40.3
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1571611541351181049271
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.60.60.50.50.50.50.5

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value287000.0251000.0394000.0397000.0394000.0286000.0300000.0428000.0393000.0399000.0460000.0494000.0507000.0513000.0573000.0608000.0620000.0626000.0687000.0707000.0747000.0740000.0803000.0839000.0851000.0857000.0918000.0953000.0964000.0971000.0495000.0530000.0542000.0548000.0
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value134136139164165167169171174177177175176177180177178179177178176173172168167164160157151145138
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.50.60.60.60.60.60.60.70.70.70.70.70.70.70.70.80.80.80.80.80.80.80.80.90.90.90.90.90.9

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

srt:ParentCompany


Investments
Period End2020-12-312019-12-312018-12-312017-12-31
Value2426226527392800
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0
Percentage of Assets9.38.510.411.1
Percentage of Assets srt:ParentCompany88.386.390.889.4

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value94949494948282828282828282827777777777777777777777777777777777
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.40.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.40.40.40.40.40.40.40.40.40.50.5

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value14151515141515151516161718192021232324252627272927282930313231
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.2

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CoreDeposits


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3.0223.3093.563.9544.3512.2432.532.8763.2583.6514.054.515.0055.5126.0246.5977.2057.8268.4519.1389.85910111212131415161716
Percentage of FiniteLivedIntangibleAssetsNet20.621.223.625.529.714.916.519.121.122.824.526.227.728.930.030.031.232.734.836.237.338.740.941.546.949.250.451.753.154.252.7
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:CoreDeposits0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value0.5430.560.5810.6030.6250.6460.6680.690.7110.7330.7550.7760.7980.820.8420.8630.8850.9060.9280.950.9720.9930.160.1680.1750.1830.190.1970.2050.2120.22
Percentage of FiniteLivedIntangibleAssetsNet3.73.63.83.94.34.34.44.64.64.64.64.54.44.34.23.93.83.83.83.83.73.60.60.60.60.70.70.70.70.70.7
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ServicingContracts


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value111110109.6671212111111111112121314141514151515161614141414141414
Percentage of FiniteLivedIntangibleAssetsNet75.775.372.670.766.080.979.176.374.372.670.969.367.966.865.866.164.963.561.460.159.057.758.658.052.550.248.947.746.345.146.6
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:ServicingContracts0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value109110109110109979797979899991001019799100101101102103104105106106
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.50.50.50.50.50.6

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312019-12-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value11664104130121222217216222228220219237227239226231222218210216
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.20.40.50.50.90.90.91.01.01.01.01.11.11.21.21.21.21.31.31.4

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value200195199171172170175179184187193
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.80.80.60.60.60.70.70.70.70.0

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

isbc:A15BranchLocationAndCorporateOffice


Operating
Period End2020-12-31
Value32
Percentage of OperatingLeaseRightOfUseAsset16.1
Percentage of Assets0.1
Percentage of Assets isbc:A15BranchLocationAndCorporateOffice0.0

Equity Securities Fv Ni

us-gaap:EquitySecuritiesFvNi

us-gaap:EquitySecuritiesFvNi


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9.69825368.7036.196.146.0396.035.9755.95.85.95.7535.701
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.10.10.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:ConsolidatedEntities

srt:ParentCompany


Equity
Period End2020-12-312019-12-312018-12-312017-12-31
Value301.0331.0330.903
Percentage of EquitySecuritiesFvNi85.617.117.815.8
Percentage of Assets0.10.00.00.0
Percentage of Assets srt:ParentCompany1.10.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:FairValueInputsLevel1, us-gaap:EstimateOfFairValueFairValueDisclosure


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9.69825368.7036.196.146.0396.035.9755.885.7935.8725.7535.701
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.099.799.999.5100.0100.0
Percentage of Assets0.00.10.10.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:EstimateOfFairValueFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9.69825368.7036.196.146.0396.035.9755.885.7935.8725.7535.701
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.099.799.999.5100.0100.0
Percentage of Assets0.00.10.10.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9.69825368.7036.196.146.0396.035.9755.885.7935.8725.7535.701
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.099.799.999.5100.0100.0
Percentage of Assets0.00.10.10.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9.69825368.7036.196.146.0396.035.9755.885.7935.8725.7535.701
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.099.799.999.5100.0100.0
Percentage of Assets0.00.10.10.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9.69825368.7036.196.146.0396.035.9755.885.7935.8725.7535.701
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.099.799.999.5100.0100.0
Percentage of Assets0.00.10.10.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value14514016316315312982694843292399973.7936.5884.539.469143.6672.9415.634.6642.2129.3725.793106.7846.5461614
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.60.60.60.50.30.30.20.20.10.10.40.40.00.00.00.00.10.00.00.00.00.00.00.00.10.00.00.10.1

us-gaap:OtherAssets us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value36373842
Percentage of OtherAssets22.546.1131.51112.5
Percentage of Assets0.10.10.10.2
Percentage of Assets srt:ParentCompany1.31.41.31.3

Time Deposit Maturities Year One

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:TimeDepositMaturitiesYearOne


Time
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value23863627372428411866258614502170
Percentage of TimeDepositMaturitiesYearOne100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.213.614.211.38.112.47.713.9

Debt And Capital Lease Obligations

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:DebtAndCapitalLeaseObligations


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value403335583295430746325466582756946083554954354853514453614461448448825093454642033894352732633358344631612766253624293367
Percentage of DebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.113.812.716.217.020.521.821.322.520.920.719.020.321.317.818.120.121.319.618.717.916.615.616.517.216.314.714.213.921.6

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value27262724232323
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.1

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value27262623222222
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.1

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value27252623222121
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.1

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-312020-03-312019-12-31
Value252121
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0100.0100.0
Percentage of Assets0.10.10.1

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-312020-03-312019-12-31
Value104100100
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0100.0100.0
Percentage of Assets0.40.40.4

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value213207212184184181185189194197200
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.80.80.70.70.70.70.70.70.70.0

us-gaap:OperatingLeaseLiability us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

isbc:A15BranchLocationAndCorporateOffice


Operating
Period End2020-12-31
Value32
Percentage of OperatingLeaseLiability15.1
Percentage of Assets0.1
Percentage of Assets isbc:A15BranchLocationAndCorporateOffice0.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value237232239208209208213
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.90.90.90.80.80.80.8

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value24252624252627
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value28142770271026692622259426212931292629553005303530903092312531553154315831233115313232153311336234083558357735483518139513341126109610861066967
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.510.710.410.09.69.79.811.010.811.111.511.912.212.312.412.713.013.213.513.814.415.215.916.517.018.419.119.920.28.58.50.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value2710262130053125
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets10.49.811.512.4
Percentage of Assets srt:ParentCompany98.699.899.699.7

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

isbc:UnallocatedCommonStockHeldByEsop


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value-73.772-74.521-75.27-76.019-76.768-77.517-78.266-79.015-79.764-80.513-81.262-82.011-82.76-83.509-84.258-85.007-85.756-86.505-87.254-88.003-88.752-89.501-90.25-88.396-89.58-90.764-91.948-93.273-94.597-29.424-29.779-30.133-30.488-30.842-31.197-32.615
Percentage of StockholdersEquity-2.6-2.7-2.8-2.8-2.9-3.0-3.0-2.7-2.7-2.7-2.7-2.7-2.7-2.7-2.7-2.7-2.7-2.7-2.8-2.8-2.8-2.8-2.7-2.6-2.6-2.6-2.6-2.6-2.7-2.1-2.2-2.7-2.8-2.8-2.9-3.4
Percentage of Assets-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.5-0.5-0.5-0.5-0.2-0.20.00.00.00.00.0
Percentage of Assets isbc:UnallocatedCommonStockHeldByEsop0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value-9.242-9.364-9.485-6.071-6.371-6.67-6.69-2.978-2.991-3.005-3.018-5.332-5.434-5.537-5.64-4.646-4.728-4.812-4.895-11.414-11.731-12.049-12.366-10.911
Percentage of StockholdersEquity-0.3-0.3-0.3-0.2-0.2-0.3-0.3-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.1-0.1-0.2-0.2-0.4-0.4-0.4-0.4-0.3
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-38.441-35.945-77.742-99.264-108.506-101.021-30.373-41.602-32.038-3.0123713
Percentage of StockholdersEquity-1.4-1.3-2.9-3.7-4.1-3.9-1.2-1.4-1.1-0.10.41.20.4
Percentage of Assets-0.1-0.1-0.3-0.4-0.4-0.4-0.1-0.2-0.1-0.00.00.10.1
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value3438576466672934287.355-8.884-58.12-50.81-44.513-21.184-7.831-8.356-10.328-12.2711113101.3717.851
Percentage of StockholdersEquity1.21.42.12.42.52.61.11.21.00.2-0.3-1.9-1.6-1.4-0.7-0.2-0.3-0.3-0.40.40.40.30.00.2
Percentage of Assets0.10.10.20.20.20.30.10.10.10.0-0.0-0.2-0.2-0.2-0.1-0.0-0.0-0.0-0.10.10.10.00.00.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value-22.366-16.507-40.016-51.068-59.236-51.386-18.622-20.895-18.411-10.675-11.569-41.117-39.54-39.74-29.339-19.885-21.418-20.747-24.6-15.351-13.934-17.864-27.825-17.886-21.375-16.528-22.404-20.046-18.465-22.36-25.696-23.91-25.346-9.719-7.607-11.106
Percentage of StockholdersEquity-0.8-0.6-1.5-1.9-2.3-2.0-0.7-0.7-0.6-0.4-0.4-1.4-1.3-1.3-0.9-0.6-0.7-0.7-0.8-0.5-0.4-0.6-0.8-0.5-0.6-0.5-0.6-0.6-0.5-1.6-1.9-2.1-2.3-0.9-0.7-1.1
Percentage of Assets-0.1-0.1-0.2-0.2-0.2-0.2-0.1-0.1-0.1-0.0-0.0-0.2-0.2-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.20.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherThanTemporaryImpairment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value-9.437-9.63-9.809-9.988-10.172-10.449-10.629-10.808-11.036-11.217-11.397-13.835-14.051-14.266-14.482-12.1-12.286-12.471-12.87-13.052-13.367-13.559-13.75-14.816
Percentage of StockholdersEquity-0.3-0.3-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.5-0.5-0.5-0.5-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of Assets us-gaap:AccumulatedOtherThanTemporaryImpairment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value-0.123-0.153-0.184-0.226-0.274-0.33-0.386-0.449-0.49-0.808-0.921-1.045-1.194-1.353-1.52-1.408-1.588-1.78-1.988-2.233-2.513-2.796-3.08-4.528
Percentage of StockholdersEquity-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value28642860285828542851282628222817280928102805280027942789278427762770276327652780278827852785277927752862286328612856749721537535535533535
Percentage of StockholdersEquity101.8103.2105.5106.9108.7108.9107.696.196.095.193.392.390.490.289.188.087.887.588.689.389.086.684.182.781.480.580.080.781.253.754.147.748.949.350.055.4
Percentage of Assets10.711.111.010.710.510.610.610.510.410.610.711.011.011.111.111.211.411.611.912.312.813.113.313.713.914.815.316.016.44.64.60.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParent


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-77.742-30.37312137.424
Percentage of StockholdersEquity-2.9-1.20.40.40.2
Percentage of Assets-0.3-0.10.00.10.0
Percentage of Assets us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParent0.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value3.6193.6193.6193.6193.6193.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5913.5893.5820.6030.5961.3561.3560.5320.5321.356
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.10.10.00.00.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value14221376133912931259124712451227120611911173117211451115108411111090107510531009984959936908877842836807783762734712688666644561
Percentage of StockholdersEquity50.549.749.448.548.048.147.541.941.240.339.138.637.036.134.735.234.634.133.732.431.429.828.327.025.723.723.422.822.354.655.163.362.961.360.558.0
Percentage of Assets5.35.35.14.94.64.74.74.64.54.54.54.64.54.44.34.54.54.54.54.54.54.54.54.54.44.44.54.54.54.64.70.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value-1380.042-1378.858-1375.996-1355.459-1355.626-1353.246-1352.91-1017.276-995.265-958.425-884.75-818.209-729.944-692.516-633.11-632.394-602.846-576.973-587.974-575.187-542.407-425.991-295.412-223.04-136.872-43.491-11.131-11.592-11.592-64.37-67.046-70.676-74.057-75.026-73.692-87.375
Percentage of StockholdersEquity-49.0-49.8-50.8-50.8-51.7-52.2-51.6-34.7-34.0-32.4-29.4-27.0-23.6-22.4-20.3-20.0-19.1-18.3-18.8-18.5-17.3-13.2-8.9-6.6-4.0-1.2-0.3-0.3-0.3-4.6-5.0-6.3-6.8-6.9-6.9-9.0
Percentage of Assets-5.1-5.3-5.3-5.1-5.0-5.1-5.1-3.8-3.7-3.6-3.4-3.2-2.9-2.7-2.5-2.6-2.5-2.4-2.5-2.6-2.5-2.0-1.4-1.1-0.7-0.2-0.1-0.1-0.1-0.4-0.40.00.00.00.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3619000.03619000.03619000.03619000.03619000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03591000.03589000.03582000.0603000.0596000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value28642860285828542851282628222817280928102805280027942789278427762770276327652780278827852785277927752862286328612856749721
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.711.111.010.710.510.610.610.510.410.610.711.011.011.111.111.211.411.611.912.312.813.113.313.713.914.815.316.016.44.64.6

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value14221376133912931259124712451227120611911173117211451115108411111090107510531009984959936908877842836807783762734
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.35.35.14.94.64.74.74.64.54.54.54.64.54.44.34.54.54.54.54.54.54.54.54.54.44.44.54.54.54.64.7

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-22.366-16.507-40.016-51.068-59.236-51.386-18.622-20.895-18.411-10.675-11.569-41.117-39.54-39.74-29.339-19.885-21.418-20.747-24.6-15.351-13.934-17.864-27.825-17.886-21.375-16.528-22.404-20.046-18.465-22.36-25.696-23.91-25.346-9.719-7.607
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.1-0.1-0.2-0.2-0.2-0.2-0.1-0.1-0.1-0.0-0.0-0.2-0.2-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.20.00.00.00.0

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value13801378137513551355135313521017995958884818729692633632602576587575542425295223136431111116467
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.15.35.35.15.05.15.13.83.73.63.43.22.92.72.52.62.52.42.52.62.52.01.41.10.70.20.10.10.10.40.4

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value3.7073.463.4433.4793.9543.8964.0936.3094.9934.5734.6394.6655.7633.375.5754.945.174.8576.8195.4615.3624.333-14.0684.4930.3510.0040.0040.015120.758-1.8180.951
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value3.7073.463.4433.4793.9543.8964.0936.3094.9934.5734.6394.6655.7633.375.5754.945.174.8576.8195.4615.3624.3334.3724.4930.3510.0040.0040.015120.758-1.8180.951
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-31.1100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value791866115377-67.6537340301642796983716744119663182466832868663760721069.167763554
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating34.384.725.763.831.4-26.428.315.111.76.516.832.829.136.131.229.820.556.732.115.842.424.136.6176.037.738.121.736.344.567.36.355.927.142.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-358.39510324439084604-21.634292-413.687-104.827-720.765-154.533-103.68-574.785-276.253-262.703-387.955-760.387-674.285-784.993-522.6-316.068-582.006-730.395-669.735-602.986-944.144-457.755-981.838-553.007-134.476-441.137-495.454-190.255
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-154.647.0102.6162.234.2236.1-8.3110.6-159.7-40.9-283.3-63.3-43.5-248.2-119.9-116.4-180.0-361.9-324.1-395.7-268.1-164.5-309.4-390.8-368.9-344.3-551.8-274.0-598.4-348.6-92.1-321.1-374.8-147.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value875-287.782-692.558-721.474-98.116-39.922-72.62-391.69145177664897626409394391643602774444264500334601534899333974431207377495100
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating377.8-130.5-291.1-299.7-39.8-15.6-27.9-148.1174.430.2261.236.532.211.3177.7174.9181.8306.1289.8390.2228.0137.7266.0178.8331.1305.0525.9199.9593.8272.0142.2274.5374.877.7

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5972.841-387.317-177.48563497-20.485-58.98268-10.808-13.7041442-464.955
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating257.51.3-162.8-73.725.7194.1-7.9-22.326.4-4.2-5.46.017.9-200.8

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-11.9484.171-4.515-12.772-16.074-0.82943-0.893-0.2233.63722-3.586-2.181-1.379103-6.217-0.5293.65411-7.873-3.15211-3.2388.134-9.7321.656-7.892-2.008-10.04510-8.51-7.297-4.478-0.533
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value5.2955.5025.225.4595.3925.2795.4044.8194.6894.6673.4914.5584.4864.5694.7514.3874.1994.0844.4584.0753.9013.7563.9113.8093.412.83.7283.6673.042.7162.5022.0632.0391.936
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value791866115377-67.6537340301642796983716744119663182466832868663760721069.167763554
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating34.384.725.763.831.4-26.428.315.111.76.516.832.829.136.131.229.820.556.732.115.842.424.136.6176.037.738.121.736.344.567.36.355.927.142.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value7972756442394851464833545757-4.75445394652434443444846414339153427292827
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating34.432.831.626.717.315.418.719.618.018.813.122.223.925.0-2.120.318.421.925.221.922.822.723.626.125.523.925.223.49.321.718.821.321.221.0

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value7.7867.112217.0334.6291.5310.804-0.3642.987-1.493-0.512-0.3570.370.770.825
Percentage of NetIncomeLoss9.89.829.010.910.93.91.6-0.76.4-3.1-0.9-0.60.61.72.1
Percentage of InterestAndDividendIncomeOperating3.43.29.22.91.90.60.3-0.11.2-0.6-0.2-0.10.20.30.4
Percentage of InterestAndDividendIncomeOperating us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value7972756442394851464833545757-4.754453946604344434448464143391534-57.35729
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0115.7100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-208.5100.0
Percentage of InterestAndDividendIncomeOperating34.432.831.626.717.315.418.719.618.018.813.122.223.925.0-2.120.318.421.929.221.922.822.723.626.125.523.925.223.49.321.7-39.321.3
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-358.39510324439084604-21.634292-413.687-104.827-720.765-154.533-103.68-574.785-276.253-262.703-387.955-760.387-674.285-784.993-522.6-316.068-582.006-730.395-669.735-602.986-944.144-457.755-981.838-553.007-134.476-441.137-495.454-190.255
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-154.647.0102.6162.234.2236.1-8.3110.6-159.7-40.9-283.3-63.3-43.5-248.2-119.9-116.4-180.0-361.9-324.1-395.7-268.1-164.5-309.4-390.8-368.9-344.3-551.8-274.0-598.4-348.6-92.1-321.1-374.8-147.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2.9812.7327.5044.073.3162.8653.7521.4221.8874.75.5363.3993.6641.7067.4133.8853.0745.8633.2526.6926.2984.8467.9724.6796.3616.5387.1759.3979.2365.8477.9854.4985.8746.187
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value875-287.782-692.558-721.474-98.116-39.922-72.62-391.69145177664897626409394391643602774444264500334601534899333974431207377495100
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating377.8-130.5-291.1-299.7-39.8-15.6-27.9-148.1174.430.2261.236.532.211.3177.7174.9181.8306.1289.8390.2228.0137.7266.0178.8331.1305.0525.9199.9593.8272.0142.2274.5374.877.7

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value343429293029303030303226272727242424241819191617173514146.9816.9735.6155.5955.5985.596
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value4.3437.615200.0572.4290.932335224473678741611.24833240.0612573123140788918034-0.0010.0111.9330.1550.00.01.376
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value12.4912.4912.4612.4612.4612.4612.4612.4612.4712.4412.4312.4112.4112.2212.011.9911.8911.9911.7411.310.2710.1510.09.99.856.076.066.066.046.045.99
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:AmortizationOfDebtModificationCostsAndPremiumOnBorrowings

isbc:AmortizationOfDebtModificationCostsAndPremiumOnBorrowings


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value540000.0534000.0546000.0547000.0541000.0591000.0
Percentage of AmortizationOfDebtModificationCostsAndPremiumOnBorrowings100.0100.0100.0100.0100.0100.0

isbc:AssetAcquisitionDeposits isbc:AssetAcquisition

isbc:AssetAcquisitionDeposits

isbc:BerkshireBankBranch


Asset
Period End2020-12-02
Value639
Percentage of AssetAcquisitionDeposits100.0

isbc:AssetAcquisitionDeposits us-gaap:AssetAcquisition

isbc:BerkshireBankBranch


Asset
Period End2020-12-02
Value633
Percentage of AssetAcquisitionDeposits99.1

isbc:AssetAcquisitionLoansAcquired isbc:AssetAcquisition

isbc:AssetAcquisitionLoansAcquired

isbc:BerkshireBankBranch


Asset
Period End2020-12-02
Value308
Percentage of AssetAcquisitionLoansAcquired100.0

isbc:AssetAcquisitionLoansAcquired us-gaap:AssetAcquisition

isbc:BerkshireBankBranch


Asset
Period End2020-12-02
Value253
Percentage of AssetAcquisitionLoansAcquired82.1

isbc:CashReceivedNetOFCashConsiderationPaidForAcquisitions

isbc:CashReceivedNetOFCashConsiderationPaidForAcquisitions


Cash
Period End2020-09-30
Value0
Percentage of CashReceivedNetOFCashConsiderationPaidForAcquisitions0.0

isbc:ComprehensiveIncomeBeforeTaxAttributableToParent

isbc:ComprehensiveIncomeBeforeTaxAttributableToParent


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value101133110100485.6488468536780717765617662
Percentage of ComprehensiveIncomeBeforeTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:ComprehensiveIncomeTaxAttributableToParent

isbc:ComprehensiveIncomeTaxAttributableToParent


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2737242813-1.13319141817191917762923
Percentage of ComprehensiveIncomeTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:FeeIncomeFromDerivativeInstrument us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

isbc:FeeIncomeFromDerivativeInstrument

us-gaap:InterestRateSwap, us-gaap:DesignatedAsHedgingInstrument


Fee
Period End2021-06-302021-03-312020-06-302020-03-31
Value01800000.001000000.0
Percentage of FeeIncomeFromDerivativeInstrument0.0100.00.0100.0

isbc:FinancingReceivableAllowanceForCreditLossWriteOffAfterRecoveryNet

isbc:FinancingReceivableAllowanceForCreditLossWriteOffAfterRecoveryNet


Financing
Period End2021-06-302020-06-30
Value-0.8064.073
Percentage of FinancingReceivableAllowanceForCreditLossWriteOffAfterRecoveryNet100.0100.0

isbc:FinancingReceivableAllowanceforCreditLossWriteoffafterRecoveryNet

isbc:FinancingReceivableAllowanceforCreditLossWriteoffafterRecoveryNet


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-1.735-2.120.6674.0748.0331.3651.452-0.22
Percentage of FinancingReceivableAllowanceforCreditLossWriteoffafterRecoveryNet100.0100.0100.0100.0100.0100.0100.0100.0

isbc:FiniteIntangibleAssetsValuationAllowanceIncreaseDecrease us-gaap:FiniteLivedIntangibleAssetsByMajorClass

isbc:FiniteIntangibleAssetsValuationAllowanceIncreaseDecrease

us-gaap:ServicingContracts


Finite
Period End2021-06-302021-03-312020-09-30
Value13000.01000000.0-1200000.0
Percentage of FiniteIntangibleAssetsValuationAllowanceIncreaseDecrease100.0100.0100.0

isbc:GainOnDispositionOfLoansReceivable

isbc:GainOnDispositionOfLoansReceivable


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value224000.0114000.036000.027000.074000.0267000.01507000.029000.0209000.010000.0804000.0
Percentage of GainOnDispositionOfLoansReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:GainOnDispositionofLeasedEquipment

isbc:GainOnDispositionofLeasedEquipment


Gain
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value313000.0984000.018000.01558000.0266000.0
Percentage of GainOnDispositionofLeasedEquipment100.0100.0100.0100.0100.0

isbc:IncomeOnBankOwnedLifeInsurance

isbc:IncomeOnBankOwnedLifeInsurance


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1552000.01952000.01579000.02067000.01596000.01396000.01593000.01832000.01540000.01577000.01501000.0
Percentage of IncomeOnBankOwnedLifeInsurance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:InterestIncomeOnNonAccrualLoans

isbc:InterestIncomeOnNonAccrualLoans


Interest
Period End2021-06-302021-03-312020-12-31
Value259000.0279000.0200000.0
Percentage of InterestIncomeOnNonAccrualLoans100.0100.0100.0

isbc:NoncashOrPartNoncashAcquisitionDepositsAssumed

isbc:NoncashOrPartNoncashAcquisitionDepositsAssumed


Noncash
Period End2020-12-312020-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.00.00.00.00.00.00.00.025413410.00.00.0
Percentage of NoncashOrPartNoncashAcquisitionDepositsAssumed0.00.00.00.00.00.00.00.00.0100.0100.00.00.00.0

isbc:NoncashorPartNoncashAcquisitionLoansAcquired

isbc:NoncashorPartNoncashAcquisitionLoansAcquired


Noncashor
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.00.00.00.00.00.00.0-0.033300.00.00.00.00.00.00.00.00.00.00.01959900.00.00.0
Percentage of NoncashorPartNoncashAcquisitionLoansAcquired0.00.00.00.00.00.00.00.0100.0100.00.00.00.00.00.00.00.00.00.00.00.0100.0100.00.00.00.0

isbc:OtherComprehensiveLossHeldToMaturitySecurityAdjustmentFromAOCIForAccretionOfTransfersFromAvailableForSaleToHeldToMaturityAfterTax

isbc:OtherComprehensiveLossHeldToMaturitySecurityAdjustmentFromAOCIForAccretionOfTransfersFromAvailableForSaleToHeldToMaturityAfterTax


Other
Period End2021-06-302020-06-30
Value30000.056000.0
Percentage of OtherComprehensiveLossHeldToMaturitySecurityAdjustmentFromAOCIForAccretionOfTransfersFromAvailableForSaleToHeldToMaturityAfterTax100.0100.0

isbc:OtherComprehensiveLossHeldtomaturitySecurityAdjustmentfromAOCIforAccretionofTransfersfromAvailableforSaletoHeldtoMaturityAfterTax

isbc:OtherComprehensiveLossHeldtomaturitySecurityAdjustmentfromAOCIforAccretionofTransfersfromAvailableforSaletoHeldtoMaturityAfterTax


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value31000.042000.048000.056000.056000.063000.041000.0318000.0113000.0124000.0149000.0159000.0167000.0-112000.0180000.0192000.0208000.0245000.0279000.0284000.0284000.0
Percentage of OtherComprehensiveLossHeldtomaturitySecurityAdjustmentfromAOCIforAccretionofTransfersfromAvailableforSaletoHeldtoMaturityAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:PaymentsforProceedsfromLoanOriginations

isbc:PaymentsforProceedsfromLoanOriginations


Paymentsfor
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value10-371.557-368.847-450.712-71.498-225.66615936512169083-44.313-22.863281592460604473257521513452502689397311253334267189-13.024
Percentage of PaymentsforProceedsfromLoanOriginations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:PaymenttoAcquireEquitySecurities

isbc:PaymenttoAcquireEquitySecurities


Paymentto
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value6.017272.520.0220.0230.0240.0250.0240.0230.0230.0220.0230.0220.0860.00.00.0
Percentage of PaymenttoAcquireEquitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

isbc:PrincipalAppliedOnAffordableHousingProjectAdvance

isbc:PrincipalAppliedOnAffordableHousingProjectAdvance


Principal
Period End2020-09-302020-06-302020-03-312019-06-302019-03-31
Value40000.039000.039000.000
Percentage of PrincipalAppliedOnAffordableHousingProjectAdvance100.0100.0100.00.00.0

isbc:PrincipalProceedsFromSaleAndMaturityOfHeldToMaturitySecurities

isbc:PrincipalProceedsFromSaleAndMaturityOfHeldToMaturitySecurities


Principal
Period End2020-12-31
Value0
Percentage of PrincipalProceedsFromSaleAndMaturityOfHeldToMaturitySecurities0.0

isbc:ProceedsFromSaleOfEquitySecuritiesFVNI

isbc:ProceedsFromSaleOfEquitySecuritiesFVNI


Proceeds
Period End2021-03-31
Value16
Percentage of ProceedsFromSaleOfEquitySecuritiesFVNI100.0

isbc:ProceedsFromSaleOfLoansAndLeasesReceivable

isbc:ProceedsFromSaleOfLoansAndLeasesReceivable


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value241832924131279122250.636110.0680.3670.012
Percentage of ProceedsFromSaleOfLoansAndLeasesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:RealEstateAcquiredForeclosure

isbc:RealEstateAcquiredForeclosure


Real
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.30.750.01.2788.3321.7121.2451.7362.861.5140.5642.6830.7121.471.0481.2731.2180.2690.5910.7620.3031.3592.0243.2650.462.3650.3140.691.1590.0252.638
Percentage of RealEstateAcquiredForeclosure0.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:RightofUseAssetObtainedinExchangeforOperatingLeaseLiabilityExcludingAcquisitions

isbc:RightofUseAssetObtainedinExchangeforOperatingLeaseLiabilityExcludingAcquisitions


Rightof
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2.168344.913.5820.5580.6380.567
Percentage of RightofUseAssetObtainedinExchangeforOperatingLeaseLiabilityExcludingAcquisitions100.0100.0100.0100.0100.0100.0100.0

isbc:TroubledDebtRestructuringWeightedAverageInterestRate us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

isbc:TroubledDebtRestructuringWeightedAverageInterestRate

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Troubled
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value04.702500.0475-0.00590.0625000.00020.05750.06070.0450000
Percentage of TroubledDebtRestructuringWeightedAverageInterestRate0.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.00.00.00.00.0

isbc:TroubledDebtRestructuringWeightedAverageInterestRate us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ConsumerPortfolioSegment, isbc:ResidentialAndConsumer


Troubled
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value3.0705.940000.03820.04960.0490.00480.04450.03170.0328-0.00020.02980.03940.03540.00190.02860.03720.03990.00010.0319
Percentage of TroubledDebtRestructuringWeightedAverageInterestRate0.00.0126.30.00.0-0.061.10.00.02400.077.452.272.90.00.00.00.00.00.00.00.00.00.0

isbc:TroubledDebtRestructuringWeightedAverageInterestRate us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

srt:RetailSite, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Troubled
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value6.00.684.250.0388-0.01080.057500-0.0026000.0468000.0467
Percentage of TroubledDebtRestructuringWeightedAverageInterestRate0.00.090.40.0183.192.00.00.0-1300.00.00.0104.00.00.00.0

isbc:WeightedAverageModifiedYield us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

isbc:WeightedAverageModifiedYield

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Weighted
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value04.702500.0475-0.00590.0625000.00020.05750.06070.04750000
Percentage of WeightedAverageModifiedYield0.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.00.00.00.00.0

isbc:WeightedAverageModifiedYield us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ConsumerPortfolioSegment, isbc:ResidentialAndConsumer


Weighted
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value6.8205.940000.040.05220.05260.0050.04370.04850.0470.00210.03750.05030.0427-0.00130.0630.06710.0605-0.00350.0528
Percentage of WeightedAverageModifiedYield0.00.0126.30.00.0-0.064.00.00.02500.076.079.998.90.00.00.00.00.00.00.00.00.00.0

isbc:WeightedAverageModifiedYield us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

srt:RetailSite, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Weighted
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value6.00.684.250.03880.00550.057500-0.0026000.0468000.0467
Percentage of WeightedAverageModifiedYield0.00.090.40.0-93.292.00.00.0-1300.00.00.098.50.00.00.0

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments


Accretion
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-2366000.0-2422000.0-3019000.0-3389000.0-2856000.0-2204000.0-1989000.0-3309000.0-2131000.0-1822000.0-2016000.0-2880000.0-2861000.0-2971000.0-3135000.0-3311000.0-3128000.0-5503000.0-3330000.0-3737000.0-3432000.0-3203000.0-3148000.0-3845000.0-3544000.0-3406000.0-3293000.0-3349000.0-1810000.0-1721000.0-1686000.0-2104000.0-2790000.0-3155000.0
Percentage of AccretionAmortizationOfDiscountsAndPremiumsInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.6970.6810.9291.4725.059102.1523.3542.1815.4453.9336.0147.0367.1074.693.0228.4923.0051.6182.9722.4317.9776.5491.392.3781.8993.0818.064.0073.0963.3912.4849.8686.867
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.340.2750.2380.9320.8699.966
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs48.840.425.663.317.291.2

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ConsumerPortfolioSegment, isbc:ConsumerAndOtherLoans


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.00.0080.0060.020.0030.012
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs0.01.20.61.40.10.1

us-gaap:ConsumerPortfolioSegment, us-gaap:ResidentialMortgage


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0650.0930.2580.1270.1480.657
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs9.313.727.88.62.96.0

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

srt:Multifamily, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.2040.2750.1410.3464.0180.126
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs29.340.415.223.579.41.2

srt:RetailSite, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0880.030.2860.0460.020.169
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs12.64.430.83.10.41.5

us-gaap:AmortizationOfDebtDiscountPremium

us-gaap:AmortizationOfDebtDiscountPremium


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value-66000.02511000.0-782000.0-952000.03201000.0-316000.0-251000.0-496000.0-920000.0-2063000.0-1274000.0-1085000.0-2086000.0-2126000.0-1258000.0-648000.0-1358000.0-1242000.0-1317000.0-1702000.0-865000.0-624000.0-3288000.0-1744000.0-1000000.0-2100000.0
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfESOPAward

us-gaap:AmortizationOfESOPAward


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1749000.01519000.01082000.0942000.0996000.01280000.01419000.01325000.01342000.01430000.01365000.01506000.01596000.01641000.01643000.01563000.01625000.01698000.01547000.01374000.01371000.01365000.01490000.01438000.01430000.01343000.01405000.01404000.01265000.0927000.0-1476000.0775000.0
Percentage of AmortizationOfESOPAward100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfESOPAward us-gaap:StatementEquityComponents

isbc:UnallocatedCommonStockHeldByEsop


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0749000.0-556000.01184000.01184000.01184000.01325000.01324000.01001000.0355000.0-709000.0355000.0
Percentage of AmortizationOfESOPAward42.849.369.279.575.258.552.856.555.852.454.949.746.945.645.647.946.144.148.454.554.654.9-37.382.382.888.294.394.379.138.348.045.8

us-gaap:AdditionalPaidInCapital


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1000000.0770000.0333000.0193000.0247000.0531000.0670000.0576000.0593000.0681000.0616000.0757000.0847000.0892000.0894000.0814000.0876000.0949000.0798000.0625000.0622000.0616000.02046000.0254000.0246000.0159000.080000.080000.0264000.0572000.0-767000.0420000.0
Percentage of AmortizationOfESOPAward57.250.730.820.524.841.547.243.544.247.645.150.353.154.454.452.153.955.951.645.545.445.1137.317.717.211.85.75.720.961.752.054.2

us-gaap:BankOwnedLifeInsuranceIncome

us-gaap:BankOwnedLifeInsuranceIncome


Bank
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1552000.01952000.01579000.02067000.01596000.01396000.01593000.01832000.01540000.01577000.01501000.01596000.01543000.01286000.0916000.0935000.01166000.0725000.01156000.01006000.01001000.01260000.0987000.0949000.0975000.01037000.01054000.01632000.01034000.0931000.0716000.0694000.0731000.0757000.0
Percentage of BankOwnedLifeInsuranceIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths

us-gaap:InterestRateSwap, us-gaap:DesignatedAsHedgingInstrument


Cash
Period End2021-06-302021-03-312020-12-31
Value-200000.0-41500000.07400000.0
Percentage of CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths100.0100.0100.0

us-gaap:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1 us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

us-gaap:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1

us-gaap:InterestRateContract, us-gaap:FairValueHedging, us-gaap:InterestIncome


Change
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-210000.00-411000.0-136000.0-7188000.0838000.0-1268000.0-5261000.0-1021000.01518000.000
Percentage of ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1 us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1

us-gaap:InterestRateContract, us-gaap:FairValueHedging, us-gaap:InterestIncome


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value189000.028000.00-1000.0-2239000.06769000.0-1111000.01179000.05297000.0922000.0-1581000.000
Percentage of ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:CommonStockDividendsPerShareDeclared us-gaap:SubsequentEventType

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:SubsequentEvent


Common
Period End2020-07-292016-01-282015-01-292014-04-17
Value0.120.060.050.05
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0

us-gaap:DebtAndEquitySecuritiesGainLoss

us-gaap:DebtAndEquitySecuritiesGainLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.2830.6510.157-0.0080.0550.202-0.0130.03-5.6170.064-32.8020.0971.147-0.0460.00.00.048
Percentage of DebtAndEquitySecuritiesGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:DebtAndEquitySecuritiesGainLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Debt
Period End2021-06-302021-03-312020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-30
Value0.0-0.3980.0110.0-5.69320.00.0-2.550.00.048
Percentage of DebtAndEquitySecuritiesGainLoss0.0-61.10.0-87538.50.0101.3-100.10.00.00.00.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss


Debt
Period End2021-06-302021-03-31
Value0398000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedGainLoss0.0100.0

us-gaap:DebtSecuritiesHeldToMaturityCreditLossExpenseReversal

us-gaap:DebtSecuritiesHeldToMaturityCreditLossExpenseReversal


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-259000.0-926000.0169000.0-149000.0249000.0431000.0
Percentage of DebtSecuritiesHeldToMaturityCreditLossExpenseReversal100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesHeldToMaturityCreditLossExpenseReversal us-gaap:FinancingReceivablePortfolioSegment

isbc:CorporateAndOtherDebtSecurities


Debt
Period End2021-06-302021-03-31
Value-256000.0-919000.0
Percentage of DebtSecuritiesHeldToMaturityCreditLossExpenseReversal98.899.2

isbc:TruPSecurity


Debt
Period End2020-09-302020-06-302020-03-31
Value-164000.0239000.0431000.0
Percentage of DebtSecuritiesHeldToMaturityCreditLossExpenseReversal110.196.0100.0

us-gaap:MunicipalBonds


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-3000.0-7000.0-8000.015000.010000.00
Percentage of DebtSecuritiesHeldToMaturityCreditLossExpenseReversal1.20.8-4.7-10.14.00.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-142000.0-142000.0-298000.0-299000.0-8000.0000-126000.0-127000.0-126000.0-115000.0-114000.0-115000.0-513000.0-514000.0-514000.0-536000.0-320000.0-321000.0-321000.0-321000.0-159000.0-158000.0-158000.0-158000.0-165000.0-165000.0-165000.0-165000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:DefinedBenefitPlanInterestCost


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value250000.0250000.0325000.0324000.0324000.0397000.0397000.0397000.0355000.0354000.0355000.0379000.0378000.0378000.0473000.0474000.0474000.0474000.0374000.0374000.0374000.0374000.0330000.0331000.0331000.0331000.0227000.0227000.0227000.0227000.0
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value392000.0392000.0623000.0623000.0332000.0397000.0397000.0397000.0481000.0481000.0481000.0865000.0864000.0864000.0393000.01882000.01882000.01904000.01480000.01481000.01481000.01481000.01093000.01093000.01093000.01093000.0867000.0866000.0866000.0866000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-38000.0109000.0232000.019000.04000.0-129000.052000.0-47000.0-40000.029000.0211000.000
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

us-gaap:OtherContract, us-gaap:OtherNonoperatingIncomeExpense


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-38000.0109000.0232000.019000.04000.0-129000.052000.0-47000.0-40000.029000.0211000.000
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:DividendIncomeEquitySecuritiesOperating

us-gaap:DividendIncomeEquitySecuritiesOperating


Dividend
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value63000.0266000.0252000.045000.032000.033000.035000.036000.035000.037000.034000.032000.033000.035000.031000.030000.030000.0
Percentage of DividendIncomeEquitySecuritiesOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value343429293029303030303226272727242424241819191617173514146.9816.973-11.1935.595
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value343429293029303030303226272727242424241819191617173514146.9816.973-11.1935.595
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeBenefitsAndShareBasedCompensation

us-gaap:EmployeeBenefitsAndShareBasedCompensation


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value5.4564.9794.5254.4214.955.1765.5127.6346.3356.0036.0046.1717.3585.0127.2186.5036.7956.5558.3666.8366.7325.6985.8615.9321.7811.3471.4091.419141.6851.6671.7261.5681.472
Percentage of EmployeeBenefitsAndShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiGainLoss

us-gaap:EquitySecuritiesFvNiGainLoss


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value283000.0253000.0157000.0-8000.028000.078000.0-15000.030000.071000.064000.0-102000.097000.053000.0-46000.0
Percentage of EquitySecuritiesFvNiGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiRealizedGainLoss

us-gaap:EquitySecuritiesFvNiRealizedGainLoss


Equity
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value210000.0-458000.00000000000
Percentage of EquitySecuritiesFvNiRealizedGainLoss100.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value73000.0711000.0157000.0-8000.028000.078000.0-15000.030000.071000.064000.0-102000.097000.053000.0-46000.0
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExtinguishmentOfDebtAmount us-gaap:SubsequentEventType

us-gaap:ExtinguishmentOfDebtAmount

us-gaap:SubsequentEvent


Extinguishment
Period End2020-10-31
Value600
Percentage of ExtinguishmentOfDebtAmount100.0

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FederalDepositInsuranceCorporationPremiumExpense


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3.23.43.552.9253.44.4013.33.33.33.33.84.9354.5254.54.54.53.93.713.3833.62.82.42.252.22.42.22.842.754.04.83.93.83.63.65
Percentage of FederalDepositInsuranceCorporationPremiumExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value397000.0397000.0397000.0398000.0396000.0388000.000
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0100.00.00.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:FinanceLeaseRightOfUseAssetAmortization


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value6.4056.3596.1215.5895.0114.834.7394.8684.8213.18
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease

us-gaap:FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease


Financing
Period End2020-12-312020-09-302020-06-302019-06-30
Value004180000.00
Percentage of FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease0.00.0100.00.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-06-302014-03-31
Value1.5032.4163.0490.8050.9852.8970.7871.9022.4011.3455.4323.9942.734.7821.0881.3151.6081.5441.6911.2051.1341.0851.5960.8861.1590.7960.7812.2450.874
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.0570.9151.0020.5180.352.5890.2010.10.5710.3310.1123.1632.4973.7060.0230.0280.0770.0720.322
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery3.837.932.964.335.589.425.55.323.824.62.179.291.577.52.12.14.84.719.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ConsumerPortfolioSegment, isbc:ConsumerAndOtherLoans


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.0710.0050.0070.080.0320.1030.2570.0250.0140.040.0080.0030.0250.0010.1930.0740.0260.020.003
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery4.70.20.29.93.23.632.71.30.63.00.10.10.90.017.75.61.61.30.2

us-gaap:ConsumerPortfolioSegment, us-gaap:ResidentialMortgage


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.8760.0580.0450.1450.3180.1690.2620.3870.3670.4321.1370.4890.0620.5050.3240.3631.0121.1170.727
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery58.32.41.518.032.35.833.320.315.332.120.912.22.310.629.827.662.972.343.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

srt:Multifamily, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.471.3931.9350.030.00.00.01.2440.00.00.00.017
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery31.357.763.53.70.00.00.065.40.00.00.00.4

srt:RetailSite, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0290.0450.060.0320.2840.0360.0670.1461.4490.5424.1750.322
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery1.91.92.04.028.81.28.57.760.340.376.98.1

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs

isbc:CollateralDependentTdrs


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.00.011-0.0040.00.00.00.00.1560.0960.4770.00.00.0420.1720.30.04.40.10.00.00.00.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.0100.0100.00.00.00.00.0100.0100.0100.00.00.0100.0100.0100.00.0100.0100.00.00.00.00.0

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty

srt:Multifamily


Financing
Period End2021-06-302021-03-31
Value0.01.4
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.012727.3

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.00.00.00.9331.00.270.00.01.03.7119.5360.4350.00.00.00.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.00.00.0100.0100.0100.00.00.0100.0100.0100.0100.00.00.00.00.0

us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302020-06-30
Value0.171.33
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.00.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-30
Value0.226
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ConsumerPortfolioSegment, isbc:ResidentialAndConsumer


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.01.8130.00.00.00.4530.7321.6642.0981.2150.7880.7120.5211.6730.3722.7791.9381.0510.6350.9580.5830.376
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.00.00.00.00.0167.80.00.0209.832.78.3163.70.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

srt:RetailSite, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2.5971.781.332.3440.0960.00.02.8760.00.00.6160.00.015
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.00.00.0234.435.60.00.0287.60.00.0141.60.00.00.0

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2 us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.00.00.00.9331.00.270.00.01.03.7119.5360.4350.00.00.00.0
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.00.00.0100.0100.0100.00.00.0100.0100.0100.0100.00.00.00.00.0

us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302020-06-30
Value0.171.33
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.00.0

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2 us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-30
Value0.226
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.0

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2 us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ConsumerPortfolioSegment, isbc:ResidentialAndConsumer


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.01.8130.00.00.00.4530.7321.6642.0981.2150.7880.7120.5211.6730.3722.8791.9381.0510.6350.9580.5830.376
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.00.00.00.00.0167.80.00.0209.832.78.3163.70.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2 us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

srt:RetailSite, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2.5971.781.332.3440.0960.00.02.8760.00.00.7880.00.020
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.00.00.0234.435.60.00.0287.60.00.0181.10.00.00.0

us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1

us-gaap:ConsumerPortfolioSegment, us-gaap:ResidentialMortgage


Financing
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.01.20.0520.1490.02-0.1380.00.27-0.0670.0910.1240.436-0.558-0.5-0.11.60.7730.1540.00.88
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment10.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

srt:RetailSite, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312019-09-302018-12-312018-09-302017-12-312017-09-30
Value0.21.80.00.00.36514-0.394
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment10.0150.0-0.0-0.0401.1-2552.078.8

us-gaap:FinitelivedIntangibleAssetsAcquired1 us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FinitelivedIntangibleAssetsAcquired1

isbc:GoldCoastBancorpInc., us-gaap:CoreDeposits


Finitelived
Period End2020-09-30
Value2500000.0
Percentage of FinitelivedIntangibleAssetsAcquired1100.0

us-gaap:GainLossOnDerivativeInstrumentsNetPretax us-gaap:DerivativeInstrumentRisk

us-gaap:GainLossOnDerivativeInstrumentsNetPretax

us-gaap:InterestRateContract


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-10489000.0-9991000.0-26087000.0-11569000.0-9003000.0-2508000.0-1201000.0420000.01764000.01991000.0759000.0606000.0-369000.0
Percentage of GainLossOnDerivativeInstrumentsNetPretax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfLoansAndLeases

us-gaap:GainLossOnSaleOfLoansAndLeases


Gain
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1.2883.8335.2853.5571.8461.6791.0150.433-0.7250.4780.6630.2570.2630.7261.2060.9921.2711.4011.6770.4371.3252.1383.1041.2191.4930.8561.2631.6461.4462.2262.0023.074
Percentage of GainLossOnSaleOfLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfMortgageLoans

us-gaap:GainLossOnSaleOfMortgageLoans


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1.0643.7195.5025.2583.4831.5790.7111.650.8060.4230.6150.410.2960.245-0.0830.7940.7960.8771.1441.3791.1270.5040.952.0441.2211.0430.7880.8061.0540.1840.770.3612.0023.074
Percentage of GainLossOnSaleOfMortgageLoans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment us-gaap:StatementScenario, us-gaap:DisposalGroupClassification

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

srt:ScenarioForecast, us-gaap:DisposalGroupDisposedOfByMeansOtherThanSaleNotDiscontinuedOperations


Gain
Period End2020-11-10
Value7000000.0
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0

us-gaap:GainsLossesOnSalesOfOtherRealEstate

us-gaap:GainsLossesOnSalesOfOtherRealEstate


Gains
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-25000.077000.0270000.0133000.0-89000.0740000.0282000.0358000.0281000.0224000.0573000.013000.0184000.0153000.0-280000.0446000.0251000.0174000.0163000.035000.0131000.0-233000.0490000.0830000.0238000.072000.076000.0270000.0333000.0131000.0763000.0226000.0532000.0-70000.0
Percentage of GainsLossesOnSalesOfOtherRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:HeldToMaturitySecuritiesSoldSecurityRealizedGainLoss

us-gaap:HeldToMaturitySecuritiesSoldSecurityRealizedGainLoss


Held
Period End2020-12-312020-09-302020-06-302017-12-312017-09-302017-06-302017-03-31
Value00124000.00001900000.0
Percentage of HeldToMaturitySecuritiesSoldSecurityRealizedGainLoss0.00.0100.00.00.00.0100.0

us-gaap:IncreaseDecreaseInAccruedInterestReceivableNet

us-gaap:IncreaseDecreaseInAccruedInterestReceivableNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-2709000.01862000.0-4612000.02708000.01875000.0-862000.0-4638000.0936000.0598000.04916000.0-782000.04339000.0-256000.01345000.0-348000.03626000.0655000.02953000.0-79000.01557000.0813000.05115000.0-2616000.03362000.0-159000.02709000.01525000.0504000.01574000.03497000.0-1783000.01178000.0150000.0-1041000.0
Percentage of IncreaseDecreaseInAccruedInterestReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance

us-gaap:IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-10.72425-28.48318-27.727-25.6421-22.75618-1.14714-12.26324-21.19711-13.40821-16.9724.646-8.00317-35.80157-6.49723-17.98110-4.39613-7.86610-3.26715
Percentage of IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeposits

us-gaap:IncreaseDecreaseInDeposits


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value447-534.391421-383.767812324187281449182480371-811.37248183466695329525224137722468515184700225-144.792417735-24.285-107.6965.459
Percentage of IncreaseDecreaseInDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOperatingLiabilities

us-gaap:IncreaseDecreaseInOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-39.60345157525-100.282-11.132-18.657-17.142-31.565-20.8465.085-0.66215-57.7918-12.55813-23.689-4.69129-21.22713-98.108278.667-10.3573.8520.37247-52.97951-3.555-8.647
Percentage of IncreaseDecreaseInOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-38.503-20.829331624473.291207.0241138-13.588-5.6223.866-10.9721.393-3.718-6.543-2.1260.271-2.9591.3351.65-4.8653.851-4.8813.3970.214-10.3122.276-20.119261.737-1.34
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationTechnologyAndDataProcessing

us-gaap:InformationTechnologyAndDataProcessing


Information
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value109.1369.0048.9989.9087.7927.9988.3487.6427.9997.4917.097.1066.1236.8715.7195.9145.865.2225.2994.9625.5615.5915.9795.3465.455.6476.3817.1416.1647.0584.6944.4363.656
Percentage of InformationTechnologyAndDataProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndDividendIncomeOperating


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value231220237240246256260264259256254244238231230225215210208198194192188186181175171167164158146137132129
Percentage of InterestAndDividendIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseBorrowings

us-gaap:InterestExpenseBorrowings


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value21181924252930323228262525222122232018181716171616141414141514151514
Percentage of InterestExpenseBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDeposits

us-gaap:InterestExpenseDeposits


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value15212934385360676765585142363332252220202020201816161514141413111212
Percentage of InterestExpenseDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeDepositsWithFinancialInstitutions

us-gaap:InterestIncomeDepositsWithFinancialInstitutions


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value38000.061000.093000.0233000.0294000.0840000.0840000.0821000.0609000.0535000.0894000.0677000.0409000.0455000.01005000.0875000.0177000.0107000.089000.076000.074000.0104000.0101000.068000.027000.029000.0173000.070000.0274000.035000.08000.020000.011000.010000.0
Percentage of InterestIncomeDepositsWithFinancialInstitutions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value204183191173148142167166162159165164167169170169161163163154152149145146141135128128126120109969088
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeFederalHomeLoanBankAdvances

us-gaap:InterestIncomeFederalHomeLoanBankAdvances


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1.9832.22.8583.4523.9974.4324.474.4564.0784.3374.2784.2963.8313.8013.6453.5572.9723.1932.7242.3152.0212.061.8351.8711.5421.6341.4411.5121.7112.1971.8761.6431.4281.45
Percentage of InterestIncomeFederalHomeLoanBankAdvances100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesMortgageBacked

us-gaap:InterestIncomeSecuritiesMortgageBacked


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value14151618202223232323211919201917171615141415141413121211109.1137.7217.1236.6366.577
Percentage of InterestIncomeSecuritiesMortgageBacked100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesOtherUSGovernment

us-gaap:InterestIncomeSecuritiesOtherUSGovernment


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value573000.0526000.0523000.0378000.0310000.0306000.0336000.0343000.0267000.0266000.0267000.0266000.0273000.0274000.0275000.0175000.028000.08000.09000.08000.09000.011000.011000.011000.012000.011000.011000.012000.012000.012000.06000.01000.01000.01000.0
Percentage of InterestIncomeSecuritiesOtherUSGovernment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesStateAndMunicipal

us-gaap:InterestIncomeSecuritiesStateAndMunicipal


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3.4563.5393.5523.2773.2763.3753.0523.1862.7342.5225.7552.6152.4322.2582.3292.2292.1364.0681.6652.0392.0571.9521.7781.5351.0241.5921.5391.3391.5481.241.4721.4061.4631.532
Percentage of InterestIncomeSecuritiesStateAndMunicipal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions

us-gaap:InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value4.8935.8484.9355.5791.3766.0266.8195.7965.6545.3355.9485.506
Percentage of InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


Labor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value61626459556059635960565960595857535748535351484945433840533938312929
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Labor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.170.1682.032-0.299-0.299-0.0080.0420.0020.0020.0020.768-0.1290.129-0.1290.818-0.120.120.120.2490.5370.5370.5362.8570.3510.3510.3521.102-0.182-0.184-0.1840.734-0.239-0.239-0.239
Percentage of LaborAndRelatedExpense0.30.33.1-0.5-0.5-0.00.10.00.00.01.4-0.20.2-0.21.4-0.20.20.20.51.01.01.05.90.70.80.82.8-0.5-0.3-0.51.9-0.8-0.8-0.8

us-gaap:NoncashOrPartNoncashAcquisitionDebtAssumed1

us-gaap:NoncashOrPartNoncashAcquisitionDebtAssumed1


Noncash
Period End2020-12-312020-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.00.00.00.00.00.00.00.05.185920.00.00.0
Percentage of NoncashOrPartNoncashAcquisitionDebtAssumed10.00.00.00.00.00.00.00.00.0100.0100.00.00.00.0

us-gaap:NoncashOrPartNoncashAcquisitionInvestmentsAcquired1

us-gaap:NoncashOrPartNoncashAcquisitionInvestmentsAcquired1


Noncash
Period End2020-12-312020-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.00.00.00.00.00.00.00.0503810.00.00.0
Percentage of NoncashOrPartNoncashAcquisitionInvestmentsAcquired10.00.00.00.00.00.00.00.00.0100.0100.00.00.00.0

us-gaap:NoncashOrPartNoncashAcquisitionOtherAssetsAcquired1

us-gaap:NoncashOrPartNoncashAcquisitionOtherAssetsAcquired1


Noncash
Period End2020-12-312020-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.00.00.00.00.00.00.00.021780.00.00.0
Percentage of NoncashOrPartNoncashAcquisitionOtherAssetsAcquired10.00.00.00.00.00.00.00.00.0100.0100.00.00.00.0

us-gaap:NoncashOrPartNoncashAcquisitionOtherLiabilitiesAssumed1

us-gaap:NoncashOrPartNoncashAcquisitionOtherLiabilitiesAssumed1


Noncash
Period End2020-12-312020-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.00.00.00.00.00.00.00.03.184200.00.00.0
Percentage of NoncashOrPartNoncashAcquisitionOtherLiabilitiesAssumed10.00.00.00.00.00.00.00.00.0100.0100.00.00.00.0

us-gaap:NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1

us-gaap:NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1


Noncash
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.00.00.00.00.00.00.0-0.013350.00.00.00.00.00.00.00.00.00.00.026814610.00.00.0
Percentage of NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired10.00.00.00.00.00.00.00.0100.0100.00.00.00.00.00.00.00.00.00.00.00.0100.0100.00.00.00.0

us-gaap:NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1

us-gaap:NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1


Noncash
Period End2020-12-312020-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.00.00.00.00.00.00.00.026314530.00.00.0
Percentage of NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed10.00.00.00.00.00.00.00.00.0100.0100.00.00.00.0

us-gaap:NoninterestExpense

us-gaap:NoninterestExpense


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value10810414210410010210610810310310210110210110910310699899191878585797673761127771605656
Percentage of NoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncome

us-gaap:NoninterestIncome


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value13204519101420146.98111-20.79410119.118.2198.3959.329.7038.5048.52118.7078.711118.5339.8749.87210117.4539.4919.53810
Percentage of NoninterestIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncomeOtherOperatingIncome

us-gaap:NoninterestIncomeOtherOperatingIncome


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value5.0837.642106.873.6454.459.5595.0854.1082.723.242.5972.7112.0021.961.2121.6871.6571.6911.8982.3831.6751.7092.1092.6482.1392.3051.9122.113.8710.9651.3271.341.243
Percentage of NoninterestIncomeOtherOperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OccupancyNet

us-gaap:OccupancyNet


Occupancy
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value17182816161516151516171514161714141414141313131211121212121210109.4119.229
Percentage of OccupancyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal

us-gaap:OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal


Off
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value5021000.0-1085000.03794000.0-6374000.03105000.04043000.0
Percentage of OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value7.287.1496.8466.5896.5266.286.2826.326.3236.32
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value7.2717.2626.9756.4195.8725.7076.0276.1736.1586.138
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-122000.0-121000.03414000.0-300000.0-299000.0-20000.03712000.0-13000.0-14000.0-13000.0-2314000.0-102000.0-103000.0-103000.0994000.0-82000.0-84000.0
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-7.864341511-10.754-48.5113.584-4.017-12.2220.16937-1.750.879-12.552-7.1212.575-1.3576.293-13.87-2.3055.45916-16.4786.117-8.0969.687-3.948-2.716.5765.546-3.1582.357-26.433-3.591
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent us-gaap:StatementEquityComponents

isbc:AccumulatedNetInvestmentGainLossBeforeReclassificationAttributabletoParent


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-4.869-24.05-2.115-1.21649-7.2038.856212132-9.725-8.159-30.535-16.0340.8693.16
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent61.9-70.4-18.411.3-101.9-201.0-220.5-178.112730.285.6555.7-928.2243.3225.233.7-232.9

isbc:ReclassificationAdjustmentForSecurityGainsIncludedinNetIncome


Other
Period End2021-06-302021-03-312020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-30
Value0.0-0.3980.0-11.380.05.69-32.8480.00.02.550.0-0.048
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent-0.0-1.2-0.0-317.5-0.0-46.6-86.5-0.00.0-35.80.03.5

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.170.1680.4170.4160.028-5.1640.0190.0190.0183.2190.1420.1430.143-0.1090.140.141
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent-2.20.53.6-3.9-0.1-144.1-0.5-0.210.78.5-8.116.3-1.11.55.4-10.4

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-3.4725812-10.412-98.27215-13.303-40.392-21.771-34.1697.3258.374178.4480.946-5.248
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent44.2170.2112.096.8202.6435.8331.2330.5-12882.2-90.0-418.6952.7-137.9-118.636.7386.7

us-gaap:AccumulatedOtherThanTemporaryImpairment


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.2680.2490.2570.3850.250.2490.3170.2510.2513.3910.30.30.30.3120.3150.314
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent-3.40.72.2-3.6-0.56.9-7.9-2.1148.58.9-17.134.1-2.4-4.412.2-23.1

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.0390.0410.0630.0730.0740.0830.0940.4430.1570.1720.2080.2210.2330.2620.3050.324
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent-0.50.10.5-0.7-0.22.3-2.3-3.692.90.5-11.925.1-1.9-3.711.8-23.9

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-2.49641219.242-7.485-70.64811-9.564-29.038-15.651-24.5645.2666.02127.3870.56-3.104
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-13.94483.8521.698-17.04-100.36114-12.794-38.664-19.681-33.1728.1478.98167.521-0.201-6.527
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-11158000.0-6628000.0-2089000.0-928000.0509000.01728000.02090000.0997000.0822000.0606000.0-369000.0-927000.0-1147000.0-1279000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:InterestExpense


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value-10468000.0-10019000.0-6628000.0-2089000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax0.00.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-5.85923118.168-7.85-32.7642.273-2.484-7.7360.89429-1.5770.2-9.795-9.4541.533-0.6713.853-9.249-1.4173.939.961-9.9392.428-4.8475.876-2.358-1.583.8953.336141.436-15.627-2.112
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

isbc:AccumulatedNetInvestmentGainLossBeforeReclassificationAttributabletoParent


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-3.708-18.32-1.606-0.99737-5.4866.798161625-7.31-6.297-22.723-13.3530.5252.001
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent63.3-77.9-19.712.7-114.8-241.4-273.7-214.21816.484.7463.5-3148.5232.0141.234.2-298.2

isbc:ReclassificationAdjustmentForSecurityGainsIncludedinNetIncome


Other
Period End2021-06-302021-03-312020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-30
Value0.0-0.2990.0-8.4420.04.221-24.2020.00.01.530.0-0.029
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-0.0-1.3-0.0-371.4-0.0-54.6-81.9-0.00.0-16.20.04.3

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.1220.121-3.4140.30.2990.02-3.7120.0130.0140.0132.3140.1020.1030.103-0.9940.0820.0840.0836.5190.3170.3180.317-2.0810.2120.2060.208-5.3690.1090.1090.109-0.4140.1410.1420.141
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-2.10.5-30.93.7-3.8-0.1-163.3-0.5-0.21.57.8-6.551.5-1.110.55.3-12.52.2-70.5-22.48.13.220.98.7-4.33.5227.7-6.92.83.3-2.99.8-0.9-6.7

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-2.496419.242-7.485-70.64811-9.564-29.038-15.651-24.5645.2666.02127.3870.56-3.104
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent42.6177.8113.195.4215.6494.0385.0375.4-1750.7-83.1-333.93010.0-127.0-78.136.5462.6

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-3.708-18.619-7.277-1.606-0.99737-5.4866.798201649-7.31-6.297-22.7230.5251.9721.943-24.25-3.0133.61910-8.6614.256-5.6215.0932.397-2.33
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent63.3-79.2-65.8-19.712.7-114.8-241.4-273.7-268.71816.4166.6463.5-3148.5232.034.2-293.950.4262.2212.692.1100.487.1175.3116.086.7-101.7147.5

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-5.85923118.168-7.85-32.7642.273-2.484-7.7360.89429-1.5770.2-9.7951.533-0.6713.853-9.249-1.4173.939.961-9.9393.489-4.8475.876-2.358-1.5813.8953.336141.436
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0143.7100.0100.0100.0100.1100.0100.0100.0100.0

us-gaap:AccumulatedOtherThanTemporaryImpairment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.1930.1790.1790.1840.2770.180.1790.2280.1810.182.4380.2160.2150.216-2.3820.1860.1850.3990.1820.3150.1920.1910.4950.1890.1860.1960.1980.199
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-3.30.81.62.3-3.5-0.57.9-9.2-2.320.18.3-13.7107.5-2.225.212.1-27.610.4-2.0-22.24.91.9-5.07.8-3.83.3-8.4-12.6

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.030.0310.0420.0480.0560.0560.0630.0410.3180.1130.1240.1490.1590.167-0.1120.180.1920.2080.2450.280.2830.2840.3180.369-4.9075.6683.011-1.693.7863.227-1.3721.295-15.769-2.253
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-0.50.10.40.6-0.7-0.22.8-1.7-4.112.60.4-9.479.5-1.71.211.7-28.65.4-2.6-19.87.22.9-3.215.2101.296.5-127.7107.097.296.7-9.790.2100.9106.7

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax


Other
Period End2021-06-302021-03-312020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0299000.0000-4221000.0-24202000.00000029000.0736000.0043000.0482000.0833000.010000.01537000.000004000.0134000.0000405000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax0.0100.00.00.00.0100.0100.00.00.00.00.00.0100.0100.00.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.00.00.00.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-06-302020-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value170000.0168000.0299000.08000.0129000.0120000.0120000.0120000.0120000.00537000.0537000.0536000.0336000.0339000.0339000.0340000.01015000.0-145000.0-147000.0-147000.01360000.0-194000.0-194000.0-194000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-2.005104.7983.31-2.904-15.7471.311-1.533-4.486-0.7258.407-0.1730.679-2.7572.3331.042-0.6862.44-4.621-0.8881.5296.489-6.5393.689-3.2493.811-1.59-1.132.6812.21-1.3720.921-10.806-1.479
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1 us-gaap:StatementEquityComponents

isbc:AccumulatedNetInvestmentGainLossBeforeReclassificationAttributabletoParent


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-1.161-5.73-0.509-0.21911-1.7172.0585.1995.2757.46-2.415-1.862-7.812-2.6810.3441.159
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent157.9-53.8-15.47.5-74.8-131.0-134.2-115.9-727.688.71396.0-274.2283.4-114.933.0-169.0

isbc:ReclassificationAdjustmentForSecurityGainsIncludedinNetIncome


Other
Period End2021-06-302021-03-312020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-30
Value0.0-0.0990.0-2.9380.01.469-8.6460.00.01.020.0-0.019
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1-0.0-0.9-0.0-224.1-0.0-32.7-102.8-0.00.043.70.02.8

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.0480.0470.1170.1170.008-1.4520.0060.0050.0050.9050.040.040.040.8850.0580.057
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1-2.40.43.5-4.0-0.1-110.8-0.4-0.1-0.710.8-23.15.9-1.537.95.6-8.3

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-0.976163.614-2.927-27.6244.39-3.739-11.354-6.12-9.6052.0592.3544.8651.0610.386-2.144
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent148.7153.6109.2100.8175.4334.9243.9253.1844.1-114.3-1190.2346.7-176.545.537.0312.5

us-gaap:AccumulatedOtherThanTemporaryImpairment


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.0750.070.0730.1080.070.070.0890.070.0710.9530.0840.0850.0842.6940.1290.129
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1-3.70.72.2-3.7-0.45.3-5.8-1.6-9.811.3-48.612.5-3.0115.512.4-18.8

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.0090.010.0150.0170.0180.020.0530.1250.0440.0480.0590.0620.0660.3740.1250.132
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1-0.40.10.5-0.6-0.11.5-3.5-2.8-6.10.6-34.19.1-2.416.012.0-19.2

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-3.708-18.32-7.277-1.606-0.99737-5.4866.79816-13.3530.5252.0012.679-24.25-1.6553.6210-8.6613.198-5.6245.0932.397-2.3293.1552.73-2.2130.152-8.723-2.043
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveLossHeldToMaturitySecurityAdjustmentFromAociForAccretionOfNoncreditPortionOfOttiAfterTax

us-gaap:OtherComprehensiveLossHeldToMaturitySecurityAdjustmentFromAociForAccretionOfNoncreditPortionOfOttiAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value193000.0179000.0179000.0184000.0277000.0180000.0179000.0228000.0181000.0180000.02438000.0216000.0215000.0216000.0-2382000.0186000.0185000.0399000.0182000.0315000.0190000.0
Percentage of OtherComprehensiveLossHeldToMaturitySecurityAdjustmentFromAociForAccretionOfNoncreditPortionOfOttiAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoninterestExpense

us-gaap:OtherNoninterestExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value8.6025.7885.9398.3677.3537.142118.2749.157.9058.9968.0177.1367.8348.4638.2288.3027.6278.2377.547.737.0347.7786.986.7856.7236.7617.177.2266.0955.824.6814.6424.632
Percentage of OtherNoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForOriginationOfMortgageLoansHeldForSale

us-gaap:PaymentsForOriginationOfMortgageLoansHeldForSale


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.687142154130189901098250272124145.271134342417979572951557159394736254560132141
Percentage of PaymentsForOriginationOfMortgageLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1042602522455070.024899603838281997677143189
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireFederalReserveStock

us-gaap:PaymentsToAcquireFederalReserveStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value6332140.00.060516712169755165884.0524836168966445302567611828244430475231
Percentage of PaymentsToAcquireFederalReserveStock100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireHeldToMaturitySecurities

us-gaap:PaymentsToAcquireHeldToMaturitySecurities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value89269910313633725988188.03119224.885137166243547821577.5324.81331136.6599.6058.242.990.00.3386.2222.8410.328
Percentage of PaymentsToAcquireHeldToMaturitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireLoansHeldForInvestment

us-gaap:PaymentsToAcquireLoansHeldForInvestment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value591.468300.06077133125911501789886195158841024857269.4199.7731652.59321424247101261303286202
Percentage of PaymentsToAcquireLoansHeldForInvestment100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302013-12-312013-09-30
Value235301311298244167187141936988118918586908179868173610.112.590.00.1370.040.0
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1028287645768417379576869788574798184851158878-1.747-21.5927.721151.1123.1670.4697.8483.0731.8518.8766.359
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfOtherDebt

us-gaap:ProceedsFromRepaymentsOfOtherDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value475262-11.106-325.965-850.326-361.0131-389.335336113899-0.336-397.461-211.46547342309366264-95.463-77.568284395229107-845.490.321-514.113292505141
Percentage of ProceedsFromRepaymentsOfOtherDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities

us-gaap:ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312016-03-312015-09-302015-06-302015-03-312014-09-30
Value0.00.0161612-1.182-14.443153.167
Percentage of ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities0.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt


Proceeds
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.08.1710.00.03990.06320.00.00.00.00.0
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesDebt0.0100.00.00.0100.00.0100.00.00.00.00.00.0

us-gaap:ProceedsFromSaleOfFederalReserveStock

us-gaap:ProceedsFromSaleOfFederalReserveStock


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value40156815395858878671575682555.3237904753824533342950438.53531594453342231
Percentage of ProceedsFromSaleOfFederalReserveStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfForeclosedAssets

us-gaap:ProceedsFromSaleOfForeclosedAssets


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.3720.8811.1380.6381.1074.510.6813.0631.4461.3083.0380.2021.3271.620.5231.7781.5630.8871.6260.1811.0242.191.5363.5831.1040.8810.862.7293.1230.9023.3491.72.7483.036
Percentage of ProceedsFromSaleOfForeclosedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfHeldToMaturitySecurities

us-gaap:ProceedsFromSaleOfHeldToMaturitySecurities


Proceeds
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value160.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0140.00.00.0
Percentage of ProceedsFromSaleOfHeldToMaturitySecurities100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.00.00.00.0

us-gaap:ProceedsFromSaleOfMortgageLoansHeldForSale

us-gaap:ProceedsFromSaleOfMortgageLoansHeldForSale


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3.13175149155189858397412522279.3959.691544407566665234534126757405462294674128156
Percentage of ProceedsFromSaleOfMortgageLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfOtherLoansHeldForSale us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty

us-gaap:ProceedsFromSaleOfOtherLoansHeldForSale

srt:Multifamily


Proceeds
Period End2021-06-302021-03-31
Value3.716
Percentage of ProceedsFromSaleOfOtherLoansHeldForSale100.0100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3.0272.0350.00.00.0010.1540.4910.1680.4190.1032.5072.7141.423.9610.0943.6667.182203.2613.8353.6971.4623.7091.2511.5233.8990.5867.8025.8623.721.0550.0
Percentage of ProceedsFromStockOptionsExercised100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ProfessionalFees

us-gaap:ProfessionalFees


Professional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value5.0422.9293.8344.0974.3063.9834.8976.013.4612.943.4973.5783.8014.4028.7128.14147.4215.6115.6734.8074.0134.5113.884.4423.2712.9874.1213.7743.793.2692.7892.3642.732
Percentage of ProfessionalFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanAndLeaseLosses

us-gaap:ProvisionForLoanAndLeaseLosses


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-9.69-2.972-2.6828.33633311.5-2.5-3.03.03.52.04.02.54.51.756.04.04.755.05.05.05.05.07.09.0119.08.09.09.25131313
Percentage of ProvisionForLoanAndLeaseLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:ProvisionForLoanLossesExpensed


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-14.452-0.961-6.6451429261.5-2.5-3.03.0
Percentage of ProvisionForLoanLossesExpensed100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-0.2943.451-0.146-1.4935.54715
Percentage of ProvisionForLoanLossesExpensed2.0-359.12.2-10.018.559.0

us-gaap:ProvisionForLoanLossesExpensed us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialPortfolioSegment, us-gaap:ConstructionLoans


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value4.7780.7751.724-3.7672.5581.71
Percentage of ProvisionForLoanLossesExpensed-33.1-80.6-25.9-25.48.56.4

us-gaap:ConsumerPortfolioSegment, isbc:ConsumerAndOtherLoans


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-0.8080.038-0.639-0.798-0.641.056
Percentage of ProvisionForLoanLossesExpensed5.6-4.09.6-5.4-2.13.9

us-gaap:ConsumerPortfolioSegment, us-gaap:ResidentialMortgage


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-2.17-2.358-10.026-3.434-3.076-0.834
Percentage of ProvisionForLoanLossesExpensed15.0245.4150.9-23.1-10.3-3.1

us-gaap:ProvisionForLoanLossesExpensed us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

srt:Multifamily, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-7.86211-1.944-2.989-12.10711
Percentage of ProvisionForLoanLossesExpensed54.4-1192.329.3-20.1-40.544.4

srt:RetailSite, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-8.096-14.3254.3862737-2.843
Percentage of ProvisionForLoanLossesExpensed56.01490.6-66.0184.0125.8-10.6

us-gaap:RestrictedStockExpense

us-gaap:RestrictedStockExpense


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2.762.552.5132.5392.9432.9013.0934.0263.6363.2713.3113.3384.211.943.9543.4713.6923.4314.7613.9543.8452.9532.9792.9940.240.0-0.0220.0110.7040.70.7860.7860.799
Percentage of RestrictedStockExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value112.168344.9097.2780.5580.6380.5771.7730.018
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SaleAndLeasebackTransactionGainLossNet us-gaap:StatementScenario, us-gaap:DisposalGroupClassification, us-gaap:SubsequentEventType

us-gaap:SaleAndLeasebackTransactionGainLossNet

us-gaap:ScenarioPlan, us-gaap:DisposalGroupDisposedOfByMeansOtherThanSaleNotDiscontinuedOperations, us-gaap:SubsequentEvent


Sale
Period End2020-12-31
Value10.0
Percentage of SaleAndLeasebackTransactionGainLossNet100.0

us-gaap:ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate

us-gaap:ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate


Servicing
Period End2021-06-302021-03-312020-12-31
Value-0.7112.030
Percentage of ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate100.0100.00.0

us-gaap:ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed

us-gaap:ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed


Servicing
Period End2021-06-302021-03-312020-12-31
Value0.614.16-1.38
Percentage of ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-31
Value-0.8412.540.07
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-31
Value0.1613.01-0.02
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-31
Value-1.213.590
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0100.00.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-31
Value0.5511.57
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-31
Value012.540
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice0.0100.00.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-31
Value012.54-0.01
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice0.0100.0100.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value214000.0216000.0167000.0104000.0103000.086000.077000.074000.072000.083000.0
Percentage of ShortTermLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssued1

us-gaap:StockIssued1


Stock
Period End2020-09-302014-03-312013-03-31
Value0.07.6270.0
Percentage of StockIssued10.0100.00.0

us-gaap:StockIssuedDuringPeriodValueAcquisitions

us-gaap:StockIssuedDuringPeriodValueAcquisitions


Stock
Period End2020-12-312020-09-302020-06-302014-12-312014-09-302014-06-302014-03-31
Value0.00.0200.00.00.00121
Percentage of StockIssuedDuringPeriodValueAcquisitions0.00.0100.00.00.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueAcquisitions us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-12-312020-09-302020-06-302014-12-312014-09-302014-06-302014-03-31
Value0.00.0200.00.00.00821
Percentage of StockIssuedDuringPeriodValueAcquisitions0.00.099.90.00.0800.0100.0

us-gaap:CommonStock


Stock
Period End2020-12-312020-09-302020-06-302014-12-312014-09-302014-06-302014-03-31
Value0.00.00.0280.00.0-0.0070.007
Percentage of StockIssuedDuringPeriodValueAcquisitions0.00.00.10.00.0-700.00.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-0.335-2.814-0.01-0.167-0.036-0.7-0.181-21.129-6.5-1.511-0.243-0.594-0.084-0.257-0.1430.0-1.049-5.137-0.07-0.591-0.711-1.8650.00.00.00.00.0-0.390.00.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.00.00.0

us-gaap:RetainedEarnings


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0.0490.136-0.005-0.092-0.013-0.09-0.0020.101-0.1180.05-0.0010.0220.0090.0270.0220.00.0890.9190.009-0.014-0.009-0.071-0.0010.00.00.00.00.2580.00.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardGross-14.6-4.850.055.136.112.91.1-0.51.8-3.30.4-3.7-10.7-10.5-15.40.0-8.5-17.9-12.92.41.33.80.00.00.00.00.0-66.20.00.0

us-gaap:TreasuryStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0.2862.6780.0150.2590.0490.790.183216.6181.4610.2440.5720.0750.230.1210.00.964.2180.0610.6050.721.9360.0010.00.00.00.00.1320.00.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardGross-85.4-95.2-150.0-155.1-136.1-112.9-101.1-99.5-101.8-96.7-100.4-96.3-89.3-89.5-84.60.0-91.5-82.1-87.1-102.4-101.3-103.80.00.00.00.00.0-33.80.00.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationForfeited us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationForfeited

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.134-0.107-0.053-0.0330.0-0.197-0.114-22.348-0.154-1.731-0.316-1.04-0.451-3.135-1.249-0.563-2.687-0.102-0.986-0.201
Percentage of StockIssuedDuringPeriodValueShareBasedCompensationForfeited100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.0120.0060.003-0.0020.00.0030.0011.3540.0070.0940.0270.060.030.2160.0840.0380.31-0.0060.0550.032
Percentage of StockIssuedDuringPeriodValueShareBasedCompensationForfeited9.0-5.6-5.76.10.0-1.5-0.9-6.1-4.5-5.4-8.5-5.8-6.7-6.9-6.7-6.7-11.55.9-5.6-15.9

us-gaap:TreasuryStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.1460.1010.050.0350.00.1940.113200.1471.6370.2890.980.4212.9191.1650.5252.3770.1080.9310.169
Percentage of StockIssuedDuringPeriodValueShareBasedCompensationForfeited-109.0-94.4-94.3-106.10.0-98.5-99.1-93.9-95.5-94.6-91.5-94.2-93.3-93.1-93.3-93.3-88.5-105.9-94.4-84.1

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value3.0272.0350.0010.1540.4910.1680.4190.1032.5072.7141.423.9610.0943.6667.182203.2613.8353.6971.4623.7091.2511.5233.8990.5867.8025.8623.72
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0.008-0.1410.0-0.287-0.221-0.065-0.257-0.023-1.572-2.428-0.156-0.227-0.02-3.286-6.824-20.448-3.211-3.842-3.558-1.542-2.847-1.0981.0613.8920.4863.3252.0770.339
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised0.3-6.90.0-186.4-45.0-38.7-61.3-22.3-62.7-89.5-11.0-5.7-21.3-89.6-95.0-102.0-98.5-100.2-96.2-105.5-76.8-87.869.799.882.942.635.49.1

us-gaap:TreasuryStock


Stock
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value3.0192.1760.0010.4410.7120.2330.6760.1264.0795.1421.5764.1880.1146.95214406.4727.6777.2553.0046.5562.3490.460.00.14.4773.7853.381
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised99.7106.9100.0286.4145.0138.7161.3122.3162.7189.5111.0105.7121.3189.6195.0202.0198.5200.2196.2205.5176.8187.830.20.017.157.464.690.9

us-gaap:StockOptionPlanExpense

us-gaap:StockOptionPlanExpense


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value947000.0910000.0929000.0941000.01011000.0988000.0998000.02285000.01350000.01302000.01328000.01326000.01470000.01430000.01621000.01469000.01478000.01426000.02058000.01508000.01516000.01380000.01392000.01499000.0111000.04000.025000.011000.01700000.059000.087000.0109000.081600.087000.0
Percentage of StockOptionPlanExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SubleaseIncome

us-gaap:SubleaseIncome


Sublease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value35000.051000.068000.067000.051000.067000.067000.067000.067000.067000.0
Percentage of SubleaseIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockAcquiredAverageCostPerShare

us-gaap:TreasuryStockAcquiredAverageCostPerShare


Treasury
Period End2021-06-302021-03-312020-12-31
Value0.9411.461.31
Percentage of TreasuryStockAcquiredAverageCostPerShare100.0100.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStockValueAcquiredCostMethod


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value4.3437.615200.0572.4290.932335224473678741611.24833240.061092573123140788918034-0.0010.0111.9330.00.0
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value4.3437.615200.0572.4290.932335224473678741611.24833240.0612573123140788918034-0.0010.0111.9330.00.0
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.9100.0100.0100.099.9100.1100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0

us-gaap:UnrealizedGainLossOnDerivatives us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:UnrealizedGainLossOnDerivatives

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest


Unrealized
Period End2021-06-302021-03-312020-06-302020-03-31
Value10106.0922.09
Percentage of UnrealizedGainLossOnDerivatives100.0100.0100.0100.0

us-gaap:VariableLeaseCost

us-gaap:VariableLeaseCost


Variable
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1000.00000000
Percentage of VariableLeaseCost100.00.00.00.00.00.00.00.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value1452500.0717530.039406.0133810.0369980.0133980.0441580.0605670.0417020.01230700.01446400.01174900.02003200.02222000.02174800.03092000.02987600.03128200.03175000.03233600.03279900.03525300.04172700.03632600.03129700.02984500.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:AmortizedCostBasisOfHedgedItem

isbc:AmortizedCostBasisOfHedgedItem


Amortized
Period End2021-06-302021-03-31
Value396408
Percentage of AmortizedCostBasisOfHedgedItem100.0100.0

isbc:BankOwnedLifeInsuranceCarryingValueConsistsOfCashSurrenderValue

isbc:BankOwnedLifeInsuranceCarryingValueConsistsOfCashSurrenderValue


Bank
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value223218211147152152155144
Percentage of BankOwnedLifeInsuranceCarryingValueConsistsOfCashSurrenderValue100.0100.0100.0100.0100.0100.0100.0100.0

isbc:BorrowedFundsOther

isbc:BorrowedFundsOther


Borrowed
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312014-12-312013-12-31
Value2847537951854331439125983099
Percentage of BorrowedFundsOther100.0100.0100.0100.0100.0100.0100.0

isbc:BorrowedFundsOtherWeightedAverageInterestRate

isbc:BorrowedFundsOtherWeightedAverageInterestRate


Borrowed
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312014-12-312013-12-31
Value1.170.02020.02180.01960.01790.02240.0183
Percentage of BorrowedFundsOtherWeightedAverageInterestRate100.0100.0100.0100.0100.0100.0100.0

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearAfterFive

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearAfterFive


Borrowed
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6.50.02360.0290.01770.01840.0230.02180.0173
Percentage of BorrowedFundsWeightedAverageInterestRateMaturitiesYearAfterFive100.0100.0100.0100.0100.0100.0100.0100.0

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearFour

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearFour


Borrowed
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1.90.0220.01980.020.01960.01780.02220.0301
Percentage of BorrowedFundsWeightedAverageInterestRateMaturitiesYearFour100.0100.0100.0100.0100.0100.0100.0100.0

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearOne

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearOne


Borrowed
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value0.330.01810.02240.02180.01260.01990.02030.0064
Percentage of BorrowedFundsWeightedAverageInterestRateMaturitiesYearOne100.0100.0100.0100.0100.0100.0100.0100.0

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearThree

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearThree


Borrowed
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value2.10.02060.02260.01950.0180.02130.030.0279
Percentage of BorrowedFundsWeightedAverageInterestRateMaturitiesYearThree100.0100.0100.0100.0100.0100.0100.0100.0

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearTwo

isbc:BorrowedFundsWeightedAverageInterestRateMaturitiesYearTwo


Borrowed
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value2.150.01820.02060.0180.02120.030.02790.0349
Percentage of BorrowedFundsWeightedAverageInterestRateMaturitiesYearTwo100.0100.0100.0100.0100.0100.0100.0100.0

isbc:BusinessCombinationCashConversionRatioPerShare dei:LegalEntity, us-gaap:StatementScenario, us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

isbc:BusinessCombinationCashConversionRatioPerShare

isbc:CitizensFinancialGroupInc, us-gaap:ScenarioPlan, isbc:BankwellFinancialGroup, us-gaap:SubsequentEvent


Business
Period End2021-07-28
Value1.46
Percentage of BusinessCombinationCashConversionRatioPerShare100.0

isbc:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeposits us-gaap:BusinessAcquisition

isbc:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeposits

isbc:BerkshireBank


Business
Period End2020-12-02
Value639
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeposits100.0

isbc:CollateralDependantLoansMeasurementInput us-gaap:Range, us-gaap:FairValueByMeasurementFrequency, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique

isbc:CollateralDependantLoansMeasurementInput

srt:Maximum, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:MeasurementInputDiscountForLackOfMarketability, us-gaap:MarketApproachValuationTechnique


Collateral
Period End2021-03-31
Value2.1
Percentage of CollateralDependantLoansMeasurementInput100.0

srt:Minimum, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:MeasurementInputDiscountForLackOfMarketability, us-gaap:MarketApproachValuationTechnique


Collateral
Period End2021-03-31
Value0.6
Percentage of CollateralDependantLoansMeasurementInput28.6

srt:WeightedAverage, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:MeasurementInputDiscountForLackOfMarketability, us-gaap:MarketApproachValuationTechnique


Collateral
Period End2021-03-31
Value4.38
Percentage of CollateralDependantLoansMeasurementInput208.6

isbc:CollateralDependantLoansReceivable

isbc:CollateralDependantLoansReceivable


Collateral
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value5272958871
Percentage of CollateralDependantLoansReceivable100.0100.0100.0100.0100.0

isbc:CollateralDependantLoansReceivable us-gaap:Collateral, us-gaap:FinancialInstrument

us-gaap:CommercialRealEstate, us-gaap:CommercialLoan


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value7.4248.758116.697
Percentage of CollateralDependantLoansReceivable14.012.212.37.6

isbc:CollateralDependantLoansReceivable us-gaap:Collateral, us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialRealEstate, us-gaap:CommercialLoan, us-gaap:RealEstateLoan


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value7.4248.758116.697
Percentage of CollateralDependantLoansReceivable14.012.212.37.6

isbc:CollateralDependantLoansReceivable us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancialInstrument

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialLoan


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value3.5766.5437.6314
Percentage of CollateralDependantLoansReceivable6.89.18.015.9

isbc:CollateralDependantLoansReceivable us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialLoan, isbc:OtherFinancingReceivable


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value0.933.5494.6119.711
Percentage of CollateralDependantLoansReceivable1.84.94.811.0

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialLoan, us-gaap:RealEstateLoan


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value2.6462.9943.0194.369
Percentage of CollateralDependantLoansReceivable5.04.23.24.9

isbc:CollateralDependantLoansReceivable us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:MarketApproachValuationTechnique


Collateral
Period End2021-03-31
Value1.944
Percentage of CollateralDependantLoansReceivable3.7

isbc:CollateralDependantLoansReceivable us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique

us-gaap:FairValueMeasurementsNonrecurring, us-gaap:MarketApproachValuationTechnique


Collateral
Period End2021-03-31
Value1.944
Percentage of CollateralDependantLoansReceivable3.7

isbc:CollateralDependantLoansReceivable us-gaap:FinancialInstrument

isbc:ResidentialMortgageAndConsumerLoan


Collateral
Period End2020-12-31
Value25
Percentage of CollateralDependantLoansReceivable35.1

isbc:ResidentialMortgageAnsConsumerLoan


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value24252625
Percentage of CollateralDependantLoansReceivable46.335.127.829.2

us-gaap:CommercialLoan


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value28466862
Percentage of CollateralDependantLoansReceivable53.764.972.270.8

isbc:CollateralDependantLoansReceivable us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

isbc:ResidentialMortgageAndConsumerLoan, isbc:OtherFinancingReceivable


Collateral
Period End2020-12-31
Value0.103
Percentage of CollateralDependantLoansReceivable0.1

isbc:ResidentialMortgageAndConsumerLoan, us-gaap:RealEstateLoan


Collateral
Period End2020-12-31
Value25
Percentage of CollateralDependantLoansReceivable34.9

isbc:ResidentialMortgageAnsConsumerLoan, isbc:OtherFinancingReceivable


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value0.0970.1030.1090.114
Percentage of CollateralDependantLoansReceivable0.20.10.10.1

isbc:ResidentialMortgageAnsConsumerLoan, us-gaap:RealEstateLoan


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value24252625
Percentage of CollateralDependantLoansReceivable46.134.927.729.1

us-gaap:CommercialLoan, isbc:OtherFinancingReceivable


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value0.933.5494.6119.711
Percentage of CollateralDependantLoansReceivable1.84.94.811.0

us-gaap:CommercialLoan, us-gaap:RealEstateLoan


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value27436452
Percentage of CollateralDependantLoansReceivable52.060.067.459.8

isbc:CollateralDependantLoansReceivable us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

isbc:OtherFinancingReceivable


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value1.0273.6524.729.825
Percentage of CollateralDependantLoansReceivable1.95.14.911.1

us-gaap:RealEstateLoan


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value51689078
Percentage of CollateralDependantLoansReceivable98.194.995.188.9

isbc:CollateralDependantLoansReceivable us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:FinancialInstrument

srt:Multifamily, us-gaap:CommercialLoan


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value17314941
Percentage of CollateralDependantLoansReceivable32.943.751.947.3

isbc:CollateralDependantLoansReceivable us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

srt:Multifamily, us-gaap:CommercialLoan, us-gaap:RealEstateLoan


Collateral
Period End2021-03-312020-12-312020-09-302020-06-30
Value17314941
Percentage of CollateralDependantLoansReceivable32.943.751.947.3

isbc:CollateralDependentLoansReceivable

isbc:CollateralDependentLoansReceivable


Collateral
Period End2021-06-302020-12-31
Value4772
Percentage of CollateralDependentLoansReceivable100.0100.0

isbc:CollateralDependentLoansReceivable us-gaap:Collateral, us-gaap:FinancialInstrument

us-gaap:CommercialRealEstate, us-gaap:CommercialLoan


Collateral
Period End2021-06-302020-12-31
Value7.4568.758
Percentage of CollateralDependentLoansReceivable15.612.2

isbc:CollateralDependentLoansReceivable us-gaap:Collateral, us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialRealEstate, us-gaap:CommercialLoan, us-gaap:RealEstateLoan


Collateral
Period End2021-06-302020-12-31
Value7.4568.758
Percentage of CollateralDependentLoansReceivable15.612.2

isbc:CollateralDependentLoansReceivable us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancialInstrument

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialLoan


Collateral
Period End2021-06-302020-12-31
Value3.0756.543
Percentage of CollateralDependentLoansReceivable6.49.1

isbc:CollateralDependentLoansReceivable us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialLoan, isbc:OtherFinancingReceivable


Collateral
Period End2021-06-302020-12-31
Value0.433.549
Percentage of CollateralDependentLoansReceivable0.94.9

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialLoan, us-gaap:RealEstateLoan


Collateral
Period End2021-06-302020-12-31
Value2.6452.994
Percentage of CollateralDependentLoansReceivable5.54.2

isbc:CollateralDependentLoansReceivable us-gaap:FinancialInstrument

isbc:ResidentialMortgageAnsConsumerLoan


Collateral
Period End2021-06-302020-12-31
Value2325
Percentage of CollateralDependentLoansReceivable48.935.1

us-gaap:CommercialLoan


Collateral
Period End2021-06-302020-12-31
Value2446
Percentage of CollateralDependentLoansReceivable51.164.9

isbc:CollateralDependentLoansReceivable us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

isbc:ResidentialMortgageAnsConsumerLoan, isbc:OtherFinancingReceivable


Collateral
Period End2021-06-302020-12-31
Value0.0910.103
Percentage of CollateralDependentLoansReceivable0.20.1

isbc:ResidentialMortgageAnsConsumerLoan, us-gaap:RealEstateLoan


Collateral
Period End2021-06-302020-12-31
Value2325
Percentage of CollateralDependentLoansReceivable48.734.9

us-gaap:CommercialLoan, isbc:OtherFinancingReceivable


Collateral
Period End2021-06-302020-12-31
Value0.433.549
Percentage of CollateralDependentLoansReceivable0.94.9

us-gaap:CommercialLoan, us-gaap:RealEstateLoan


Collateral
Period End2021-06-302020-12-31
Value2443
Percentage of CollateralDependentLoansReceivable50.260.0

isbc:CollateralDependentLoansReceivable us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

isbc:OtherFinancingReceivable


Collateral
Period End2021-06-302020-12-31
Value0.5213.652
Percentage of CollateralDependentLoansReceivable1.15.1

us-gaap:RealEstateLoan


Collateral
Period End2021-06-302020-12-31
Value4768
Percentage of CollateralDependentLoansReceivable98.994.9

isbc:CollateralDependentLoansReceivable us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:FinancialInstrument

srt:Multifamily, us-gaap:CommercialLoan


Collateral
Period End2021-06-302020-12-31
Value1331
Percentage of CollateralDependentLoansReceivable29.143.7

isbc:CollateralDependentLoansReceivable us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:FinancialInstrument, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

srt:Multifamily, us-gaap:CommercialLoan, us-gaap:RealEstateLoan


Collateral
Period End2021-06-302020-12-31
Value1331
Percentage of CollateralDependentLoansReceivable29.143.7

isbc:CumulativeBasisAdjustmentOfHedgedItem

isbc:CumulativeBasisAdjustmentOfHedgedItem


Cumulative
Period End2021-06-302021-03-31
Value5800000.06500000.0
Percentage of CumulativeBasisAdjustmentOfHedgedItem100.0100.0

isbc:DebtSecuritiesHeldToMaturityNetOfAllowanceForCreditLosses

isbc:DebtSecuritiesHeldToMaturityNetOfAllowanceForCreditLosses


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value119112471236119811111148
Percentage of DebtSecuritiesHeldToMaturityNetOfAllowanceForCreditLosses100.0100.0100.0100.0100.0100.0

isbc:DebtSecuritiesHeldToMaturityNetOfAllowanceForCreditLosses us-gaap:ConsolidatedEntities

srt:ParentCompany


Debt
Period End2020-12-312019-12-31
Value2425
Percentage of DebtSecuritiesHeldToMaturityNetOfAllowanceForCreditLosses2.02.2

isbc:DebtSecuritiesHeldToMaturitySecuritiesRestrictedFairValue

isbc:DebtSecuritiesHeldToMaturitySecuritiesRestrictedFairValue


Debt
Period End2021-06-302021-03-312020-12-312020-09-30
Value1850192019301620
Percentage of DebtSecuritiesHeldToMaturitySecuritiesRestrictedFairValue100.0100.0100.0100.0

isbc:DeferredFeesPremiumsAndOtherNet

isbc:DeferredFeesPremiumsAndOtherNet


Deferred
Period End2021-06-302020-12-31
Value-13391000.0-9318000.0
Percentage of DeferredFeesPremiumsAndOtherNet100.0100.0

isbc:DeferredFeesPremiumsandOtherNet

isbc:DeferredFeesPremiumsandOtherNet


Deferred
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-14815000.0-9318000.0-12274000.0-10044000.07275000.0907000.0
Percentage of DeferredFeesPremiumsandOtherNet100.0100.0100.0100.0100.0100.0

isbc:DeferredTaxAssetFairValueAdjustmentsRelatedToAcquisition

isbc:DeferredTaxAssetFairValueAdjustmentsRelatedToAcquisition


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1111151220313838
Percentage of DeferredTaxAssetFairValueAdjustmentsRelatedToAcquisition100.0100.0100.0100.0100.0100.0100.0100.0

isbc:DeferredTaxAssetsTaxDeferredExpenseLoanOriginationFees

isbc:DeferredTaxAssetsTaxDeferredExpenseLoanOriginationFees


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value8.0047.518.3257.9649.5997.127109.13
Percentage of DeferredTaxAssetsTaxDeferredExpenseLoanOriginationFees100.0100.0100.0100.0100.0100.0100.0100.0

isbc:DepositsCertificateofDepositsPurchasedThroughBroker

isbc:DepositsCertificateofDepositsPurchasedThroughBroker


Deposits
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value32713101530759687417
Percentage of DepositsCertificateofDepositsPurchasedThroughBroker100.0100.0100.0100.0100.0100.0

isbc:DepositsCheckingAccount

isbc:DepositsCheckingAccount


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value6354610160435696585254355512510346974700478346364286438249094633421639543916587552754857463641863978402338923750370835503163
Percentage of DepositsCheckingAccount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:DepositsExcludingTimeDepositsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

isbc:DepositsExcludingTimeDepositsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:EstimateOfFairValueFairValueDisclosure


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value171521645716807154191526613997138531317312820127731300912698126141291413897132431287112552123331200711226107771064799799720989296018393806575836769
Percentage of DepositsExcludingTimeDepositsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:DepositsExcludingTimeDepositsFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value171521645716807154191526613997138531317312820127731300912698126141291413897132431287112552123331200711226107771064799799720989296018393806579257334
Percentage of DepositsExcludingTimeDepositsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0104.5108.3

us-gaap:EstimateOfFairValueFairValueDisclosure


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value171521645716807154191526613997138531317312820127731300912698126141291413897132431287112552123331200711226107771064799799720989296018393806575836769
Percentage of DepositsExcludingTimeDepositsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:DepositsMoneyMarketDepositsPurchasedThroughBroker

isbc:DepositsMoneyMarketDepositsPurchasedThroughBroker


Deposits
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value886266311709736614
Percentage of DepositsMoneyMarketDepositsPurchasedThroughBroker100.0100.0100.0100.0100.0100.0

isbc:FinancingReceivableLoansHeldForSale

isbc:FinancingReceivableLoansHeldForSale


Financing
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value1.37830193929
Percentage of FinancingReceivableLoansHeldForSale100.0100.0100.0100.0100.0

isbc:FinancingReceivableLoansHeldForSaleExcludingAccruedInterest

isbc:FinancingReceivableLoansHeldForSaleExcludingAccruedInterest


Financing
Period End2020-12-31
Value30
Percentage of FinancingReceivableLoansHeldForSaleExcludingAccruedInterest100.0

isbc:FinancingReceivableModificationsRecordedInvestmentNonAccrual

isbc:FinancingReceivableModificationsRecordedInvestmentNonAccrual


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value192025252422232426263430271832333620202122232422171711119.4731011
Percentage of FinancingReceivableModificationsRecordedInvestmentNonAccrual100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:FinancingReceivableModificationsRecordedInvestmentNonAccrual us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value2.9193.3813.8814.2074.6825.1945.8446.1461314101.2561.2871.3161.6281.6561.6880.4762.586
Percentage of FinancingReceivableModificationsRecordedInvestmentNonAccrual11.613.016.218.519.920.922.123.239.546.939.37.03.93.94.58.08.12.210.4

isbc:FinancingReceivableModificationsRecordedInvestmentNonAccrual us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value4.534.3628.6068.767.5126.5547.0447.7428.3169.0011716122.8211619205.5815.1764.27810
Percentage of FinancingReceivableModificationsRecordedInvestmentNonAccrual23.821.134.133.831.328.830.031.231.534.050.551.844.915.650.657.056.626.924.820.241.7

isbc:FinancingReceivableModificationsRecordedInvestmentNonAccrual us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ConsumerPortfolioSegment, isbc:ResidentialAndConsumer


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value141616171616161718171614151516141515151614
Percentage of FinancingReceivableModificationsRecordedInvestmentNonAccrual76.278.965.966.268.771.270.068.868.566.049.548.255.184.449.443.043.473.175.279.858.3

isbc:FinancingReceivableModificationsRecordedInvestmentNonAccrual us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

srt:RetailSite, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4.534.3625.6875.3793.6312.3472.3622.5482.4722.8552.8590.6140.63414
Percentage of FinancingReceivableModificationsRecordedInvestmentNonAccrual23.821.122.520.715.110.310.110.39.410.88.42.02.343.9

isbc:FinancingReceivableModificationsRecordedInvestmentStillAccruing

isbc:FinancingReceivableModificationsRecordedInvestmentStillAccruing


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value9.319.0959.2329.80912121312121313131212101311129.4458.7921210222529313535323739
Percentage of FinancingReceivableModificationsRecordedInvestmentStillAccruing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:FinancingReceivableModificationsRecordedInvestmentStillAccruing us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value0.430.930.630.482.8052.732.5351.6691.831.972.070.570.570.4950.00.00.00.00.01.9110.64
Percentage of FinancingReceivableModificationsRecordedInvestmentStillAccruing4.610.26.84.923.121.319.413.415.014.415.24.34.54.00.00.00.00.00.021.72.8

isbc:FinancingReceivableModificationsRecordedInvestmentStillAccruing us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value0.430.930.630.482.8052.732.5351.6691.8511.972.070.570.570.5010.00.1710.2430.00.3522.19114
Percentage of FinancingReceivableModificationsRecordedInvestmentStillAccruing4.610.26.84.923.121.319.413.415.214.415.24.34.54.10.01.32.10.03.724.962.8

isbc:FinancingReceivableModificationsRecordedInvestmentStillAccruing us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ConsumerPortfolioSegment, isbc:ResidentialAndConsumer


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value8.888.1658.6029.3299.347101010101111121211101311129.0936.6018.375
Percentage of FinancingReceivableModificationsRecordedInvestmentStillAccruing95.489.893.295.176.978.780.686.684.885.684.895.795.595.9100.098.797.9100.096.375.137.2

isbc:FiniteIntangibleAssetsValuationAllowance

isbc:FiniteIntangibleAssetsValuationAllowance


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value73000.060000.01010000.01458000.02654000.0303000.0103000.0223000.0223000.0175000.0175000.0174000.0174000.0122000.0122000.0122000.0106000.0165000.0165000.0231000.0121000.0121000.0121000.0121000.0121000.0121000.0121000.081000.081000.081000.081000.0
Percentage of FiniteIntangibleAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:FiniteIntangibleAssetsValuationAllowance us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ServicingContracts


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value73000.060000.01010000.01458000.02654000.0303000.0103000.0223000.0223000.0175000.0175000.0174000.0174000.0122000.0122000.0122000.0106000.0165000.0165000.0231000.0121000.0121000.0121000.0121000.0121000.0121000.0121000.081000.081000.081000.081000.0
Percentage of FiniteIntangibleAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:HedgedAssetFairValueHedgeCumulativeIncreaseDecreaseUnamortizedPortion

isbc:HedgedAssetFairValueHedgeCumulativeIncreaseDecreaseUnamortizedPortion


Hedged
Period End2021-06-302021-03-312020-12-312020-09-30
Value5900000.06800000.08800000.09100000.0
Percentage of HedgedAssetFairValueHedgeCumulativeIncreaseDecreaseUnamortizedPortion100.0100.0100.0100.0

isbc:HeldToMaturityAccruedInterestReceivable

isbc:HeldToMaturityAccruedInterestReceivable


Held
Period End2020-12-31
Value5200000.0
Percentage of HeldToMaturityAccruedInterestReceivable100.0

isbc:HeldtomaturityAccruedInterestReceivable

isbc:HeldtomaturityAccruedInterestReceivable


Heldtomaturity
Period End2021-03-312020-09-30
Value5200000.04900000.0
Percentage of HeldtomaturityAccruedInterestReceivable100.0100.0

isbc:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour

isbc:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value111104104104
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour100.0100.0100.0100.0

isbc:LoansDeferred

isbc:LoansDeferred


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value59969379010204070
Percentage of LoansDeferred100.0100.0100.0100.0100.0

isbc:MarketableSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses

isbc:MarketableSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses


Marketable
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value0.0360.00.00.3370.7522.5912851905650327.1610.680.7050.7310.2220.1670.5121.370.7241.8251.3053.7257.6156.2972.7821.66
Percentage of MarketableSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:MarketableSecuritiesContinuousUnrealizedLossPositionAggregateLosses

isbc:MarketableSecuritiesContinuousUnrealizedLossPositionAggregateLosses


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value12222.1652.7163.5175.4012.0761.4252.597285813611810149282834431.4270.3721.201152.1588.7951.9595.675128.1261526
Percentage of MarketableSecuritiesContinuousUnrealizedLossPositionAggregateLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:MarketableSecuritiesContinuousUnrealizedLossPositionFairValue

isbc:MarketableSecuritiesContinuousUnrealizedLossPositionFairValue


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value88382431424722326546029255921362389340133333434305621642031215525713681082941607474999281715129182110241044
Percentage of MarketableSecuritiesContinuousUnrealizedLossPositionFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

isbc:MarketableSecuritiesContinuousUnrealizedLossPosit