INDB


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

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding
us-gaap:StatementClassOfStock

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
indb:StockOptions
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

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

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:InterestExpense

us-gaap:InterestIncomeExpenseNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:OtherComprehensiveIncomeLocation
us-gaap:StatementEquityComponents
us-gaap:ProductOrService
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

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
dei:LegalEntity
us-gaap:TierOneRiskBasedCapital
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:Cash

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:OperatingLeaseRightOfUseAsset

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

us-gaap:OtherAssets
us-gaap:ConsolidatedEntities

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:LongTermDebt
us-gaap:ConsolidatedEntities
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:FairValueByLiabilityClass

us-gaap:LongTermDebtNoncurrent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:OtherComprehensiveIncomeLocation

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:DebtInstrument, us-gaap:DerivativeInstrumentRisk, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:VariableRate

us-gaap:EffectiveIncomeTaxRateContinuingOperations
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

indb:CapitalcommitmentrelatingtoLowIncomeHousingProjectinvestmentsnoncash

indb:ChangeInFairValueOnLoansHeldForSale

indb:ChangeInUnamortizedNetLoanCostsAndPremiums
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:ValuationTechnique
indb:FairValueInputsCumulativeDefault
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:ValuationTechnique
indb:FairValueInputsCureGivenDefault
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:ValuationTechnique
indb:FairValueInputsLossGivenDefault
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique

indb:FeesAndCommissionMortgageBanking

indb:FinancingReceivableAllowanceforCreditLossPeriodIncreaseDecreasebypercentage

indb:FinancingReceivableAllowanceforCreditLossesEffectofChangeinMethodnetoftax.

indb:GainRealizedOnLifeInsurancePolicies
us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
indb:IncreaseDecreaseInFairValueOfUnhedgedDerivativeInstrumentsRelatingToResidentialLoans

indb:IncreaseDecreaseInFederalHomeLoanBankAdvancesLongTerm
us-gaap:StatementEquityComponents
indb:IncreaseDecreaseinDeferredCompensationandOtherRetirementBenefits

indb:InterchangeAndAtmFees

indb:InvestmentinLowIncomeHousingProjects

indb:IssuanceOfRestrictedStockAwardsNetofIssuanceCost

indb:NetPurchasesfromStockOptionsExercised

indb:NonTaxableInterestAndDividendsOnSecurities

indb:OffBalanceSheetCreditLossLiabilityChangeinMethodCreditLossExpenseReversalnetoftax.

indb:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForLossOnTerminationOfDerivativesAfterTax

indb:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForLossOnTerminationOfDerivativesTax

indb:OtherComprehensiveIncomeLossReclassificationAdjustmentfromAOCIforLossonTerminationofDerivativesbeforeTax

indb:OthernoninterestincomeASC606

indb:PaymentsOnEarlyTerminationOfHedgingRelationship

indb:ServiceChargesOnDepositAccounts

indb:SoftwareMaintenance

indb:StockRepurchasedDuringPeriodValueasaresultofStockOptionsExercised
us-gaap:StatementEquityComponents

indb:TotalnoninterestincomeinscopeofASC606

indb:TotalnoninterestincomeoutofscopeofASC606

indb:Totalunusualorinfrequentexpenseitems

indb:UsGaap_FinancingReceivableTroubledDebtRestructuringIncreaseDecreaseFromModification

us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities

us-gaap:AdvertisingExpense

us-gaap:AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization

us-gaap:BankOwnedLifeInsuranceIncome

us-gaap:BusinessCombinationAcquisitionRelatedCosts
us-gaap:IncomeStatementLocation
us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
us-gaap:StatementEquityComponents
us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CurrentFederalStateAndLocalTaxExpenseBenefit

us-gaap:DebtAndEquitySecuritiesUnrealizedGainLoss

us-gaap:DepreciationAndAmortization

us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EquitySecuritiesFvNiGainLoss

us-gaap:EquitySecuritiesFvNiRealizedGainLoss

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableAllowanceForCreditLossesEffectOfChangeInMethod
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:LoanRestructuringModification

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSalesOfLoansNet

us-gaap:GainLossOnTerminationOfLease

us-gaap:IncomeLossFromAffordableHousingProjectsEquityMethodInvestments

us-gaap:IncreaseDecreaseInEquitySecuritiesFvNi

us-gaap:IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet

us-gaap:IncreaseDecreaseInLoansHeldForSale

us-gaap:IncreaseDecreaseInOtherDeposits

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInTimeDeposits

us-gaap:IncreaseDecreaseInTradingSecurities

us-gaap:InformationTechnologyAndDataProcessing

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndFeeIncomeLoansAndLeasesHeldForSale

us-gaap:InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio

us-gaap:InterestExpenseBorrowings

us-gaap:InterestExpenseDeposits

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeFederalFundsSold

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions

us-gaap:LaborAndRelatedExpense

us-gaap:LifeInsuranceCorporateOrBankOwnedChangeInValue

us-gaap:LossOnContractTermination

us-gaap:LossOnDerivativeInstrumentsPretax

us-gaap:NoninterestExpense

us-gaap:NoninterestIncome

us-gaap:NoninterestIncomeOtherOperatingIncome

us-gaap:OccupancyNet

us-gaap:OffBalanceSheetCreditLossLiabilityChangeInMethodCreditLossExpenseReversal

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherNoninterestExpense

us-gaap:PaymentsForProceedsFromFederalHomeLoanBankStock

us-gaap:PaymentsForProceedsFromLoansAndLeases

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireHeldToMaturitySecurities

us-gaap:PaymentsToAcquireLifeInsurancePolicies

us-gaap:ProceedsFromLifeInsurancePolicies

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesRepaymentsAndCallsOfTradingSecuritiesHeldforinvestment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromStockPlans

us-gaap:ProfessionalFees

us-gaap:ProvisionForLoanAndLeaseLosses

us-gaap:ProvisionForLoanLossesExpensed
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:SaleLeasebackTransactionCurrentPeriodGainRecognized
us-gaap:AwardDate, us-gaap:AwardType, us-gaap:PlanName, us-gaap:Vesting
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType, us-gaap:PlanName
us-gaap:AwardType, us-gaap:PlanName
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage

us-gaap:StockIssuedDuringPeriodValueOther
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

dei:EntityCommonStockSharesOutstanding

indb:AdditionalCommitmentsToLendToBorrowerForTroubleDebtRestructuring
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
indb:AssetsAndLiabilitiesFairValueDisclosureNonrecurring
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
indb:AssetsAndLiabilitiesFairValueDisclosureRecurring
us-gaap:FairValueByMeasurementFrequency

indb:AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesAmortizedCost

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesAmortizedCost

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterFiveThroughTenYearsAmortizedCost

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterFiveThroughTenYearsFairValue

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterOneThroughFiveYearsAmortizedCost

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterOneThroughFiveYearsFairValue

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterTenYearsAmortizedCost

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterTenYearsFairValue

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesWithinOneYearAmortizedCost

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesWithinOneYearFairValue
us-gaap:SubsequentEventType
indb:BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesOfCompanyStockIssuedForEachShareOfAcquireeStock
us-gaap:SubsequentEventType
indb:BusinessCombinationCostofAcquiredEntityPurchasePrice

indb:CallableSecuritiesInInvestmentPortfolio

indb:CertificatesofDepositsover250000.00
dei:LegalEntity
indb:CommonEquityTier1CapitaltobeWellCapitalized
dei:LegalEntity
indb:CommonEquityTierOneCapitalforCapitalizedAdequacytoRiskWeightedAssets
us-gaap:ConsolidatedEntities
dei:LegalEntity
indb:CommonEquityTierOneCapitaltobeWellCapitalizedtoRiskWeightedAssets
dei:LegalEntity
indb:CommonEquitytierOneCapitaltoRiskWeightedAssets
us-gaap:ConsolidatedEntities

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterFiveThroughTenYearsAmortizedCost

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterFiveThroughTenYearsFairValue

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterOneThroughFiveYearsAmortizedCost

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterOneThroughFiveYearsFairValue

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterTenYearsAmortizedCost

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterTenYearsFairValue

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDatewithinOneYearAmortizedCost

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDatewithinOneYearFairValue

indb:DeferredTaxAssetLoanFairValueAdjustment

indb:DeferredTaxAssetOperatingLeaseLiability

indb:DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSale
us-gaap:RetirementPlanType
indb:DefinedBenefitPlanAlternativeInvestmentsFairValueOfPlanAssets
us-gaap:FairValueByFairValueHierarchyLevel
indb:DefinedBenefitPlanFairValueofPlanAssetsExcludingNetAssetValueInvestments
us-gaap:RetirementPlanType
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
indb:DerivativeInstrumentNotDesignatedasaHedgeForwardSaleHedgeCommitmentAssetatFairValue
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
indb:DerivativeInstrumentNotDesignatedasaHedgeForwardSaleHedgeCommitmentLiabilityatFairValue
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
indb:DerivativeInstrumentNotDesignatedasaHedgeForwardSalesAgreementsAssetatFairValue
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
indb:DerivativeInstrumentNotDesignatedasaHedgeForwardSalesAgreementsLiabilitiesatFairValue
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
indb:DerivativeInstrumentNotDesignatedasaHedgeInterestRateLockCommitmentsAssetatFairValue

indb:ExposureToCounterpartiesRelatingToCustomerRelatedPositions

indb:ExposuretoInstitutionalCounterparties

indb:FederalHomeLoanBankAdvancesWeightedAverageInterestRateinclusiveofSwaps

indb:FinanceReceivableNonaccrualwithallowance
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FairValueByLiabilityClass
indb:FinancialLiabilitiesBookValue

indb:FinancingReceivableRecordedInvestmentTroubleDebtRestructuring
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
indb:FinancingReceivableWithCreditQualityOfLoanBasedUpontheWeightedAverageLoanToValueRatio
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
indb:FinancingReceivableWithQualityOfLoanBasedOnWeightedAverageFicoRating
us-gaap:ConsolidatedEntities
indb:InvestmentInSubsidiaries

indb:InvestmentManagementIncomeReceivable

indb:LoanswithactiveDeferrals
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:TradingActivityByType
indb:NotionalAmountMaturingInNextTwelveMonths
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:TradingActivityByType
indb:NotionalAmountMaturingInYearFiveAndThereafter
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:TradingActivityByType
indb:NotionalAmountMaturingInYearFour
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:TradingActivityByType
indb:NotionalAmountMaturingInYearThree
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:TradingActivityByType
indb:NotionalAmountMaturingInYearTwo

indb:OriginalInvestmentinLowIncomeHousingProjects
us-gaap:ConsolidatedEntities
indb:ReallocationOfTaxAssetFromParentToBankSubsidiaryNoncashAdjustment

indb:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsPricePerShareCommonStockAverageHighAndLowPriceIntrinsicValue

indb:TdrsRecordedInvestmentOnAccrualStatus

indb:TdrsRecordedInvestmentOnNonaccrualStatus

indb:TimeDepositMaturitiesNextTwelveMonthsPercentOfTotal

indb:TimeDepositMaturitiesYearFivePercentOfTotal

indb:TimeDepositMaturitiesYearFourPercentOfTotal

indb:TimeDepositMaturitiesYearThreePercentOfTotal

indb:TimeDepositMaturitiesYearTwoPercentOfTotal

indb:TimeDepositsPercentOfTotal

indb:TotalFederalHomeLoanBankAdvances
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass
us-gaap:AccruedLiabilitiesFairValueDisclosure
us-gaap:FairValueByLiabilityClass

us-gaap:AdvancesFromFederalHomeLoanBanks
us-gaap:FairValueByLiabilityClass

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestments
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecurities
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:BankOwnedLifeInsurance
us-gaap:FairValueByAssetClass
us-gaap:SubsequentEventType
us-gaap:BusinessAcquisitionSharePrice
dei:LegalEntity
us-gaap:Capital
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:CapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:CapitalRequiredToBeWellCapitalized
dei:LegalEntity
us-gaap:CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets

us-gaap:CashAndDueFromBanks

us-gaap:CashCashEquivalentsAndFederalFundsSold
us-gaap:ConsolidatedEntities
us-gaap:FairValueByAssetClass
us-gaap:CashSurrenderValueFairValueDisclosure
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel
dei:LegalEntity
us-gaap:CommonEquityTierOneCapital
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:CommonEquityTierOneCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities

us-gaap:CommonStockIssuedEmployeeStockTrust

us-gaap:CompensationAndBenefitsTrust
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:CreditRiskDerivativeAssetsAtFairValue
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:CreditRiskDerivativeLiabilitiesAtFairValue

us-gaap:DebtInstrumentCarryingAmount
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount

us-gaap:DebtInstrumentUnamortizedPremium

us-gaap:DebtSecuritiesAvailableForSaleAndHeldToMaturity

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards
indb:InvestmentsinLowIncomeHousingProjects

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts

us-gaap:DeferredTaxLiabilitiesDerivatives

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPrepaidExpenses

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet
us-gaap:Range, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation
us-gaap:DefinedBenefitPlanByPlanAssetCategories
us-gaap:DefinedBenefitPlanPlanAssetsInvestmentWithinPlanAssetCategoryAmount
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:Range, us-gaap:DefinedBenefitPlanByPlanAssetCategories
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

us-gaap:DemandDepositAccounts

us-gaap:DepositLiabilitiesCollateralIssuedFinancialInstruments

us-gaap:DepositLiabilitiesReclassifiedAsLoansReceivable1

us-gaap:Deposits

us-gaap:DepositsMoneyMarketDeposits

us-gaap:DepositsSavingsDeposits

us-gaap:DerivativeAssets
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAverageCapInterestRate
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAverageFixedInterestRate
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAverageFloorInterestRate
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAverageVariableInterestRate
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeCollateralObligationToReturnCash

us-gaap:DerivativeCollateralObligationToReturnSecurities

us-gaap:DerivativeCollateralRightToReclaimCash
us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeCollateralRightToReclaimSecurities
us-gaap:BalanceSheetLocation
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral
us-gaap:BalanceSheetLocation
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeFairValueOfDerivativeNet
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:TradingActivityByType
us-gaap:BalanceSheetLocation
us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
us-gaap:BalanceSheetLocation
us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue

us-gaap:DerivativeLiabilities
us-gaap:ConsolidatedEntities

us-gaap:DerivativeNetLiabilityPositionAggregateFairValue
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:TradingActivityByType
us-gaap:ConsolidatedEntities
us-gaap:DividendsPayableCurrentAndNoncurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
us-gaap:FinancialInstrument
us-gaap:FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch
us-gaap:LineOfCreditFacility
us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds

us-gaap:FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate

us-gaap:FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate

us-gaap:FederalHomeLoanBankAdvancesWeightedAverageInterestRate
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass
us-gaap:FederalHomeLoanBankBorrowingsFairValueDisclosure
us-gaap:FairValueByLiabilityClass

us-gaap:FederalHomeLoanBankStock
us-gaap:FairValueByAssetClass

us-gaap:FinancingReceivableAllowanceForCreditLosses
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableNonaccrualNoAllowance
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableRecordedInvestmentCurrent
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableRecordedInvestmentPastDue
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableRevolving
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:HeldToMaturitySecurities
us-gaap:FairValueByAssetClass
us-gaap:FinancialInstrument
us-gaap:InternalCreditAssessment

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment
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:FairValueByAssetClass
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FinancialInstrument

us-gaap:InterestBearingDepositsInBanks
us-gaap:DerivativeInstrumentRisk
us-gaap:InterestPayableCurrent
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:InterestRateDerivativeAssetsAtFairValue
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:InterestRateDerivativeLiabilitiesAtFairValue

us-gaap:InterestReceivable
us-gaap:DerivativeInstrumentRisk
us-gaap:FinancialInstrument
us-gaap:FairValueByAssetClass
us-gaap:InvestmentInFederalHomeLoanBankStockFairValueDisclosure
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:ConsolidatedEntities
us-gaap:JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust
us-gaap:FairValueByLiabilityClass

us-gaap:JuniorSubordinatedNotes

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:LoansAndLeasesReceivableAllowance
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:LoansAndLeasesReceivableGrossCarryingAmount
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:LoansAndLeasesReceivableNetReportedAmount
us-gaap:FairValueByAssetClass

us-gaap:LoansAndLeasesReceivableRelatedParties
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:LoansHeldForSaleFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:LoansPledgedAsCollateral
us-gaap:FairValueByAssetClass
us-gaap:LoansReceivableFairValueDisclosure
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup

us-gaap:LongTermDebtFairValue
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass
us-gaap:FairValueByLiabilityClass

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:MarketableSecurities

us-gaap:MortgageLoansInProcessOfForeclosureAmount
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:NotesReceivableGross
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LienCategory
us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:OffBalanceSheetCreditLossLiability

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OtherLiabilities
us-gaap:ConsolidatedEntities
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged
us-gaap:ConsolidatedEntities
us-gaap:PrepaidTaxes

us-gaap:QualifiedAffordableHousingProjectInvestmentsCommitment

us-gaap:RelatedPartyDepositLiabilities

us-gaap:SecuredDebt
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice

us-gaap:SubordinatedDebt
us-gaap:ConsolidatedEntities
us-gaap:FairValueByLiabilityClass
dei:LegalEntity
us-gaap:TierOneLeverageCapital
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneLeverageCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalized
dei:LegalEntity
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
dei:LegalEntity
us-gaap:TierOneLeverageCapitalToAverageAssets
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneRiskBasedCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneRiskBasedCapitalRequiredToBeWellCapitalized
dei:LegalEntity
us-gaap:TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets

us-gaap:TimeDepositMaturitiesYearFive

us-gaap:TimeDepositMaturitiesYearFour

us-gaap:TimeDepositMaturitiesYearThree

us-gaap:TimeDepositMaturitiesYearTwo

us-gaap:TimeDeposits

us-gaap:TimeDeposits100000OrMore

us-gaap:TimeDepositsLessThan100000

us-gaap:TradingSecuritiesDebt
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
indb:JuniorSubordinatedDebenture
us-gaap:UnamortizedDebtIssuanceExpense
indb:JuniorSubordinatedDebenture, us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType
us-gaap:ConsolidatedEntities, us-gaap:SubordinatedBorrowing
us-gaap:DebtInstrument
us-gaap:LongtermDebtType
us-gaap:SubordinatedBorrowing

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Interest Expense
Balance Sheet
Intangible Assets Net Excluding Goodwill
Assets
Operating Lease Right Of Use Asset
NonCurrent Assets
Intangible Assets Net Excluding Goodwill
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Noncurrent Liabilities
Long Term Debt Noncurrent
Stockholders Equity
Common Stock Value
CashFlow
Payments To Acquire Property Plant And Equipment
NetCashProvidedByUsedInOperatingActivities
Gain Loss On Sale Of Property Plant Equipment
NetCashProvidedByUsedInInvestingActivities
Payments To Acquire Property Plant And Equipment
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 Undiscounted Excess Amount
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Accumulated Amortization
BanksAndOrInsurance
Interest And Dividend Income Operating
AssetsBanks
Financing Receivable Allowance For Credit Losses
LiabilitiesBanks
Deposits

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:CommonStockValue ▇▇▇▇▇▇███▅▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁0.3290.3290.3280.3280.3280.3310.3420.3420.3420.280.2790.2740.2740.2730.2730.2730.2720.2690.2680.2610.2610.2610.260.260.2590.2590.2370.2370.2360.2360.2350.2270.2260.2260.2250.2140.2140.2130.2130.2120.212NA0.21NANA
us-gaap:CommonStockSharesIssued █▇▂▁33.03785933.02488232.96569232.955547NANA34.377388NANANA28.080408NANANA27.45019NANANA27.00581326.32046726.30988726.29356526.23635226.21223826.15882626.12357623.99873823.91167823.90407223.87805623.80598422.95928722.90428422.87134722.77400921.66692621.6277121.60828521.49976821.46510921.454189NA21.220801NANA
us-gaap:CommonStockSharesOutstanding █▇▂▁33.03785933.02488232.96569232.955547NANA34.377388NANANANANANANANANANANANANANANANA26.21223826.15882626.12357623.99873823.91167823.90407223.87805623.80598422.95928722.90428422.87134722.77400921.66692621.6277121.60828521.49976821.46510921.454189NA21.220801NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁33.05484833.02543NA32.97667632.97285934.22125834.42119834.40056634.3553728.1606527.87401327.6013427.58117827.55395427.52335427.51309927.33229627.11092326.77005126.37738826.35201426.31873226.29077626.26411426.22141225.0400824.05513224.00236323.99197323.91923823.48105323.04711422.94029922.86979322.31834321.70630421.64420421.58548721.50405321.47679121.48102321.344339NA21.03416521.055645
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁33.03357832.995332NA32.95191832.94476134.18443134.37495334.36117634.31349228.10618427.81543727.53784127.52665327.48657327.44573927.43679227.25779927.0296426.71002926.32431626.30412926.27532326.23800426.20062126.14959324.95986523.9683223.91167823.89741323.81906523.38360822.94630822.88815522.82375322.28684121.65418821.62382721.56100621.48469521.46371421.44186421.298257NA20.98137220.964706
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount indb:StockOptions us-gaap:EmployeeStockOptionNANANA0.010.010.0NA0.0050.00.0NA0.00.0001810.000143NA0.00.00.0NA0.0042930.00.002252NA0.0NANANANANANANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic ▆▆▅▅▃▃▇█▄▆▅▆▆▅▄▄▃▃▃▃▃▃▃▃▃▁▃▃▂▂▁▃▂▂▁▂▁▂▂▂▂▂▂▂▁1.141.261.05000000000000031.060.760.781.381.510.891.251.081.21.131.00.80.870.750.770.640.780.770.710.740.710.670.380.670.660.620.560.450.640.560.540.450.540.410.570.520.560.520.530.54999999999999980.530.38
us-gaap:EarningsPerShareDiluted ▆▆▅▅▃▃▇█▄▆▅▆▆▅▄▄▃▃▃▃▃▃▃▃▃▁▃▃▂▂▁▃▂▂▁▂▁▂▂▂▂▂▂▂▁1.141.261.05000000000000031.060.760.781.381.510.891.251.071.21.131.00.80.870.750.760.640.780.770.710.740.710.670.380.660.660.610.560.450.640.560.540.450.530.410.560.520.560.520.520.54999999999999980.530.38
 us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets dei:LegalEntity indb:RocklandTrustCompanyNANA1.329e-05NANANA1.3230000000000001e-07NANANA1.271e-07NANANA1.222e-07NANANA1.198e-07NANANA1.182e-07NANANA1.0399999999999999e-07NANANA1.063e-07NANANA1.021e-07NANANA1.013e-07NANANANANANA
 us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities us-gaap:ConsolidatedEntitiesNANA1.334e-05NANANA1.353e-07NANANA1.299e-07NANANA1.231e-07NANANA1.199e-07NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CapitalToRiskWeightedAssets dei:LegalEntity indb:RocklandTrustCompanyNANA1.454e-05NANANA1.4e-07NANANA1.366e-07NANANA1.3189999999999998e-07NANANA1.3009999999999998e-07NANANA1.2839999999999999e-07NANANA1.198e-07NANANA1.2420000000000001e-07NANANA1.207e-07NANANA1.217e-07NANANANANANA
 us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities us-gaap:ConsolidatedEntitiesNANA1.513e-05NANANA1.483e-07NANANA1.4449999999999998e-07NANANA1.3819999999999998e-07NANANA1.36e-07NANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:ComprehensiveIncomeNetOfTax ▆▄▄▄▄█▅█▆▆▆▄▄▃▃▃▃▃▂▃▃▃▂▃▂▂▂▂▃▂▁▂▁▂▁▂▁▂▂▁▁▂▂▁39.98228.17326.70431.6627.01958.3139.44457.09144.70343.27941.42530.46529.19922.41919.81724.22721.24321.42312.34220.40122.14522.87517.68620.04715.72811.17915.8515.42718.10715.76310.21514.9929.8312.3099.03212.3428.37212.84111.0438.58410.38611.70313.8266.918NA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▆▆▅▅▄▃▇█▅▅▄▅▅▄▄▄▄▃▃▃▃▃▃▃▃▁▂▂▂▂▁▂▂▂▁▂▁▂▂▂▂▂▂▂▁50.01953.64845.18446.07232.68128.89961.84568.88140.63546.74738.19242.98440.36734.38336.97936.53331.29429.73924.87730.27729.88227.03927.72426.46124.66413.32922.17822.15320.6818.73313.37519.95417.04316.36613.09615.28812.11216.80415.41716.56615.21215.38915.38914.81110.245
us-gaap:IncomeTaxExpenseBenefit NANANA11.1997.7792.14814.36817.03610.00711.5228.2589.9699.2496.82814.91512.68110.7319.0147.6989.7939.5088.4288.2687.8677.2133.8696.2016.4155.9345.352.7865.2994.2854.1143.1273.6873.2384.6214.2484.6074.0924.2013.5513.6662.215
us-gaap:InterestExpense ▁▁▂▃▄▆▇▇█▄▃▃▂▂▂▂▂▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▃▃▃▃▄▄▅3.3484.0535.3627.0368.86713.07613.7115.02616.1259.0187.6186.6415.9995.2785.0444.7054.3784.2074.6764.644.6274.854.9855.1835.2695.185.0074.8055.2325.3745.6665.8315.885.9585.9355.7175.7985.9436.5287.2617.3987.4858.5839.39110.152
us-gaap:InterestIncomeExpenseNet ▇▇▆▆▆▇▇██▅▅▅▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁93.35495.58491.44390.88391.09894.30499.993104.598106.01982.52580.29276.23473.16868.47167.83267.07363.75560.258.75257.66856.53354.89154.88555.04553.74751.24949.8249.56349.05347.60646.90545.19645.61544.86245.47942.83842.62841.85341.85441.67442.07641.47341.38741.19741.167
us-gaap:NetIncomeLoss ▆▆▅▅▄▄▇█▅▅▄▅▅▄▃▄▃▃▂▃▃▃▃▃▃▁▂▂▂▂▁▂▂▂▁▂▁▂▂▂▁▂▂▁▁37.57241.71134.64134.87324.90226.75147.47751.84530.62835.22529.93433.01531.11827.55522.06423.85220.56320.72517.17920.48420.37418.61119.45518.59417.4519.4615.97815.73814.74613.38310.58814.65512.75812.2529.96811.6018.87412.18311.16911.95911.1211.18811.83811.1458.03
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax ▂▁▂▂▃█▁▃▅▃▄▂▃▃▃▃-1.593-6.583-3.655-2.7290.19722.984-4.5743.038.593.2855.131-0.405-0.1120.2150.4350.109NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▃▁▂▃▃█▂▄▅▄▅▃▃▂▃▃▃▃▂▃▃▄▃▃▃▃▃▃▄▃▃▃▃▃▃▃▃▃▃▃▃2.41-13.538-7.937-3.2132.11731.559-8.0335.24614.0758.05411.491-2.55-1.919-5.136-2.2470.3750.680.698-4.837-0.0831.7714.264-1.7691.453-1.7231.719-0.128-0.3113.3612.38-0.3740.337-2.9280.057-0.9370.741-0.5020.658-0.126-3.375-0.734NANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService indb:ATMCharge▅▃▂▄▁▃▅█▇▃▅▆▅▃▄▆0.7350.6250.6040.7080.5250.6390.7630.9390.8560.6660.7460.8250.7360.6540.6770.815NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService indb:CreditCardIncome█▅▄▄▁▂0.3130.2360.2280.2160.1510.183NANA0.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService indb:InvestmentAdvisoryRetailInvestmentandInsuranceService▇█▅▃▁▂▇▂▅▄▆▄▅▂▃▃0.8450.9020.6920.5740.4690.540.8170.5530.730.6790.7630.6520.7390.560.6090.565NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService indb:MerchantProcessing▅▄▃▅▃▇▅▁▄▃▇▁▅█▄▅0.3390.320.2990.330.2770.3930.3410.230.3240.280.3950.2270.3480.4310.3250.337NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService us-gaap:CreditCardMerchantDiscount▂▁▁▁▇▆███▅▆▆▆▄▅▅2.1411.9031.8992.0254.5364.1044.7894.9134.8253.7354.1663.9433.9193.4053.623.597NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService us-gaap:DepositAccount▄▃▄▃▁▇██▇▅▆▆▆▆▆▅3.8223.5843.8943.4282.8294.975.2555.2995.084.4064.6874.6584.5514.4314.4854.401NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService us-gaap:InvestmentAdvisoryManagementAndAdministrativeService█▆▅▅▅▃▅▄▄▃▂▂▃▁▂▁8.0277.4027.0446.9976.8276.2896.8136.6356.4236.0695.8645.9126.0835.5825.6175.402NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:Assets ██▇▇▇▆▆▆▆▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁14194.20713773.91413204.30113173.66513022.511980.2411395.16511538.63911603.1998997.4578851.5928375.4978381.0028090.418082.0298052.9198017.2937738.1147709.3757502.0097418.8667189.2687210.0387135.4897195.9216911.0856364.9126384.4286348.3186225.926099.2345895.4645852.5955721.125756.9855192.0945124.5644985.7394970.244899.7664842.943NA4695.738NANA
us-gaap:Liabilities ██▇▇▇▆▆▆▆▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁12452.58512058.54311501.61611483.94111350.80810300.5849687.0229856.3159967.1967892.9197778.1027377.1927403.9377134.3517138.227121.6957102.7096860.6346844.6856683.7676614.9696401.1216438.5756376.2866452.6046178.1995724.3855757.2465731.8295623.3645507.6945339.725308.995183.5455227.6654699.1294640.9724506.8764501.1834438.74387.241NA4259.266NANA
us-gaap:LiabilitiesAndStockholdersEquity ██▇▇▇▆▆▆▆▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁14194.20713773.91413204.30113173.66513022.511980.2411395.16511538.63911603.1998997.4578851.5928375.4978381.0028090.418082.0298052.9198017.2937738.1147709.3757502.0097418.8667189.2687210.0387135.4897195.9216911.0856364.9126384.4286348.3186225.926099.2345895.4645852.5955721.125756.9855192.0945124.5644985.7394970.244899.7664842.943NA4695.738NANA
us-gaap:StockholdersEquity ████████▇▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁1741.6221715.3711702.6851689.7241671.6921679.6561708.1431682.3241636.0031104.5381073.49998.305977.065956.059943.809931.224914.584877.48864.69818.242803.897788.147771.463759.203743.317732.886640.527627.182616.489602.556591.54555.744543.605537.575529.32492.965483.592478.863469.057461.066455.702447.985436.472425.661422.062
 us-gaap:TierOneRiskBasedCapital dei:LegalEntity indb:RocklandTrustCompanyNANA1206.566NANANA1205.74NANANA872.024NANANA784.014NANANA725.76NANANA660.979NANANA527.038NANANA498.434NANANA451.701NANANA385.189NANANANANANA
 us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities us-gaap:ConsolidatedEntitiesNANA1211.177NANANA1232.963NANANA892.176NANANA789.992NANANA727.07NANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 us-gaap:Cash us-gaap:ConsolidatedEntities srt:ParentCompanyNANA100.604NANANA135.688NANANA64.256NANANA48.131NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:PropertyPlantAndEquipmentGross NANA216.476NANANA218.921NANANA182.787NANANA171.227NANANA146.762NANANA138.115NANANA119.902NANANA115.686NANANA102.118NANANA90.562NANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:BuildingNANA63.544NANANA62.455NANANA53.052NANANA49.159NANANA43.553NANANA39.182NANANA33.425NANANA32.858NANANA24.16NANANA21.438NANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:EquipmentLeasedToOtherPartyNANA10.6NANANA10.644NANANA10.644NANANA10.644NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixturesNANA81.815NANANA77.705NANANA66.974NANANA62.521NANANA58.237NANANA55.336NANANA49.894NANANA46.613NANANA43.763NANANA38.857NANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandNANA32.45NANANA32.619NANANA24.502NANANA23.719NANANA20.585NANANA20.78NANANA15.786NANANA16.026NANANA14.514NANANA11.523NANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNANA38.667NANANA35.498NANANA27.615NANANA25.184NANANA24.387NANANA22.817NANANA20.797NANANA20.189NANANA19.681NANANA18.744NANANANANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA100.083NANANA95.247NANANA85.206NANANA76.505NANANA68.282NANANA62.452NANANA55.828NANANA50.736NANANA46.891NANANA42.31NANANANANANA
us-gaap:AmortizationOfIntangibleAssets ▂▂▇▂▂▂█▂▂▁▂▁▁1.2931.3926.21.4281.4331.5316.81.5671.5720.8571.030.5070.512NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PropertyPlantAndEquipmentNet ▇▇▇██████▆▆▅▅▅▅▅▅▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▁▁▁▁▁▁117.435115.945116.393121.816122.172121.873123.674125.026123.37498.84397.58195.94195.83895.21494.72294.90692.66482.02778.4876.42976.17376.69275.66373.73874.14373.31564.07464.18664.16664.43364.9556.72956.34455.1655.22749.149.38449.67848.25247.64646.368NA45.712NANA
us-gaap:Goodwill █████████▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁506.206506.206506.206506.206506.206506.206506.206504.562504.562256.105256.105231.806231.806231.806231.806231.806231.806221.526221.526201.083201.083201.083201.083201.083201.083201.083170.421170.421170.421170.421170.421150.391150.391150.391150.391127.847130.074130.074130.074130.074130.074NA129.617NANA
us-gaap:IntangibleAssetsNetExcludingGoodwill NANA23.10724.54325.99627.46629.286NANANA15.25NANANA9.341NANANA9.848NANANA11.826NANANA9.885NANANA12.221NANANA11.753NANANA10.648NANANANANANA
 us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CoreDepositsNANA22.21523.62525.05226.48528.016NANANA13.692NANANA8.636NANANA8.527NANANA10.264NANANA9.269NANANA11.218NANANA10.328NANANA9.66NANANANANANA
 us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:OtherIntangibleAssetsNANA0.8920.9180.9440.9811.27NANANA1.558NANANA0.705NANANA1.321NANANA1.562NANANA0.616NANANA1.003NANANA1.425NANANA0.988NANANANANANA
us-gaap:FiniteLivedIntangibleAssetsNet ▅▅▅▆▆▆▇▇█▃▃▁▁▁▂▂▂▁▂▂▂▂▂▂▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂20.3721.68923.10724.54325.99627.46629.28631.30733.33414.33915.257.3797.9188.4629.34110.29911.1999.0879.8489.75110.44311.13511.82612.52913.24813.9759.88510.4511.03911.6312.22110.17110.69811.22511.7539.4469.8510.24910.64811.02911.415NA12.339NANA
us-gaap:IntangibleAssetsNetIncludingGoodwill NANA529.313530.749532.202533.672535.492NANANA271.355NANANA241.147NANANA231.374NANANA212.909NANANA180.306NANANA182.642NANANA162.144137.3NANA140.7NANANANANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet NANA10.731NANANA2.014NANANA8.25NANANA5.475NANANA15.534NANANA14.054NANANA18.713NANANA24.969NANANA25.345NANANA16.141NANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset NANA49.7NANANA56.651.851.533.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EquitySecuritiesFvNi █▇▆▄▄▁▅▄▄▃▁▃22.97522.41922.10721.11920.8119.43921.26121.02120.80720.35719.47720.43NANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:TimeDepositMaturitiesYearOne NANA789.237NANANA1097.407NANANA511.292NANANA393.452NANANA430.834NANANA488.046NANANA462.506NANANA559.402NANANA518.957NANANA476.318NANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:LongTermDebt ▁▁▂▂▂▅▅▅▅▅█23.42528.09932.77337.44737.43374.9274.90674.89474.87974.914111.291NANANA108.198NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent NANA145.32NANANA187.355NANANA110.901NANANA107.755NANANA107.742NANANA108.464NANANA188.685NANANA153.906NANANA262.451NANANA181.467NANANANANANA
 us-gaap:LongTermDebtNoncurrent us-gaap:DebtInstrument,us-gaap:LongtermDebtType indb:CapitalTrustVPreferredSecuritiesDueIn2037,us-gaap:JuniorSubordinatedDebtNANA51.51NANANA51.507NANANA51.505NANANA51.503NANANA51.5NANANA51.547NANANA51.547NANANA51.547NANANA51.547NANANA51.547NANANANANANA
 us-gaap:LongTermDebtNoncurrent us-gaap:DebtInstrument,us-gaap:LongtermDebtType indb:CentralBancorpCapitalTrustISecuritiesDueIn2034,us-gaap:JuniorSubordinatedDebtNANA5.258NANANA5.258NANANA5.258NANANA5.258NANANA5.302NANANA5.258NANANA5.258NANANA5.258NANANA5.258NANANA0.0NANANANANANA
 us-gaap:LongTermDebtNoncurrent us-gaap:DebtInstrument,us-gaap:LongtermDebtType indb:CentralBancorpCapitalTrustIiSecuritiesDueIn2037,us-gaap:JuniorSubordinatedDebtNANA6.083NANANA6.083NANANA6.083NANANA6.083NANANA6.081NANANA6.349NANANA6.57NANANA6.791NANANA7.012NANANA0.0NANANANANANA
us-gaap:DebtAndCapitalLeaseObligations ▁▁▁▃▃▇▃▃▆▃▂▃▃▃▄▄▃▃▄▃▃▃▄▄▅▅▅▄▄▅▆▇▇▇█▆▆▆▇█▇171.713176.387181.06295.734295.701545.985303.103292.791499.702308.04258.707299.738300.792298.939323.698340.683320.378304.297335.474299.521298.368293.265344.502351.102386.205395.015406.655367.06345.737422.565448.488507.681557.3550.782591.055489.899476.217484.115537.686568.264535.67NA565.434NANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA10.725NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA8.769NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA7.237NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA6.102NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA11.192NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:StockholdersEquity ████████▇▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁1741.6221715.3711702.6851689.7241671.6921679.6561708.1431682.3241636.0031104.5381073.49998.305977.065956.059943.809931.224914.584877.48864.69818.242803.897788.147771.463759.203743.317732.886640.527627.182616.489602.556591.54555.744543.605537.575529.32492.965483.592478.863469.057461.066455.702447.985436.472425.661422.062
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:CumulativeEffectPeriodOfAdoption,us-gaap:StatementEquityComponents srt:CumulativeEffectPeriodOfAdoptionAdjustment,us-gaap:RetainedEarningsNANA1.5531.553NANANANANANANANANANA0.831NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockValue ▇▇▇▇▇▇███▅▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁0.3290.3290.3280.3280.3280.3310.3420.3420.3420.280.2790.2740.2740.2730.2730.2730.2720.2690.2680.2610.2610.2610.260.260.2590.2590.2370.2370.2360.2360.2350.2270.2260.2260.2250.2140.2140.2130.2130.2120.212NA0.21NANA
us-gaap:AdditionalPaidInCapital ▇▇▇▇▇▇███▄▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁948.13946.002945.638944.218942.685962.5131035.451033.9491029.594527.795527.648483.222481.979479.715479.43477.877476.684452.048451.664409.731408.155406.921405.486404.089401.437399.936311.978308.723307.72306.156305.179274.369272.165270.927269.95237.859236.279235.381233.878232.845231.987NA226.708NANA
us-gaap:RetainedEarningsAccumulatedDeficit ██▇▇▇▇▇▆▆▅▅▅▅▄▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁763.596741.883716.024696.546676.834667.084654.182621.831585.111569.582546.736527.473504.926484.266465.937452.658437.587425.802414.095404.75391.898379.153368.169355.537343.757333.104330.444320.226310.226301.218293.56288.208278.611270.891263.671258.481251.429247.097239.452232.369224.488NA210.32NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▆▅▇███▄▅▅▃▂▁▁▁▂▂▂▂▂▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂29.56727.15740.69548.63251.84549.72818.16926.20220.9566.881-1.173-12.664-10.114-8.195-1.8310.4160.041-0.639-1.3373.53.5831.812-2.452-0.683-2.136-0.413-2.132-2.004-1.693-5.054-7.434-7.06-7.397-4.469-4.526-3.589-4.33-3.828-4.486-4.36-0.985-0.251-0.766NANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue █▅▃▃█▃▄▄▇▄▅▃▆▅▄▃▄▂▂▂▃▃▁▂▂▃▂▂▃▂▁▁▂▃▂▂▂▃▂▂▂▃▁▁1.611.150.8260.8681.5790.850.990.9811.5170.9151.0640.7691.3511.0410.9870.7860.9170.6430.6570.6750.7680.8650.4620.6660.6230.7390.6370.5790.8190.6770.5390.5340.6290.760.6670.6270.6980.8530.5660.5650.6360.7160.460.463NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▅▅▄▃▂▅█▁▄▄▄▄▄▄▄▃▄▅▄▃▃▄▄▄▃▄▄▃▃▄▄▄▄▃▃▃▃▃▃▃▄▃▄50.28967.46453.81324.185-2.959-10.40379.286152.096-49.02834.16838.04336.1533.76133.88342.48239.21711.77637.43453.56225.72612.5051.54327.46824.20330.4477.42525.47128.715.85514.71326.30643.79145.17926.05912.175-0.60820.9539.16419.84-3.372-0.58939.6525.23225.515NA
us-gaap:NetCashProvidedByUsedInInvestingActivities █▄▆▇▁▅▇█▇▆▅▆▅▆▅▇▆▅▆▆▆▆▆▆▆▇▇▅▆▅▆▅▆▇▇▆▅▅▆▇▆▆▅▇63.376-174.493-37.84918.109-376.333-92.13834.10272.289-19.498-66.733-127.433-60.132-130.51-69.436-109.774-15.879-65.931-125.185-67.219-66.097-77.733-27.837-65.5-74.179-76.14710.285-17.158-94.619-64.472-110.857-63.036-102.556-35.93-7.0745.057-59.244-88.609-122.875-72.45620.997-56.24-82.129-116.363-21.494NA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▅▂▃█▅▁▁▂▃▃▂▄▂▂▂▃▂▂▃▃▂▃▂▄▂▂▂▃▃▂▂▃▂▂▂▃▂▂▂▃▂▂▂373.426579.73212.635120.0231013.635422.944-181.686-199.127-29.73474.38488.998-48.277254.307-12.01521.143-0.39570.40418.729-55.05166.037200.633-52.73963.469-95.472285.202-39.69-55.39120.387102.19897.102-54.12829.01127.849-34.61919.84949.866120.24311.99955.2829.919177.424-52.104-4.712-65.085NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▇▆▂▃█▅▁▂▁▂487.091472.70328.599162.317634.343320.403-68.29825.258-98.2641.819NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:DeferredIncomeTaxExpenseBenefit ▆▆▁▆▆▆█▆▆▆▅▆▆▆█▆▆▆▆▆▆▆▇▆▇▆▆▆▆▆▆▆▆▆▅▆▆▆▆▆▆▆▅▆-0.0980.567-20.308-0.243-0.0633.10810.423-0.228-0.140.539-4.673-0.107-0.0760.3598.768-0.199-0.0670.709-0.319-0.101-0.0470.4624.8480.04.7330.6392.381-0.1040.0920.4712.5520.00.0030.002-1.891-0.009-0.01-0.0090.123-0.011-0.01-0.011-2.489-0.008NA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▅▅▄▃▂▅█▁▄▄▄▄▄▄▄▃▄▅▄▃▃▄▄▄▃▄▄▃▃▄▄▄▄▃▃▃▃▃▃▃▄▃▄50.28967.46453.81324.185-2.959-10.40379.286152.096-49.02834.16838.04336.1533.76133.88342.48239.21711.77637.43453.56225.72612.5051.54327.46824.20330.4477.42525.47128.715.85514.71326.30643.79145.17926.05912.175-0.60820.9539.16419.84-3.372-0.58939.6525.23225.515NA
us-gaap:NetIncomeLoss ▆▆▅▅▄▄▇█▅▅▄▅▅▄▃▄▃▃▂▃▃▃▃▃▃▁▂▂▂▂▁▂▂▂▁▂▁▂▂▂▁▂▂▁▁37.57241.71134.64134.87324.90226.75147.47751.84530.62835.22529.93433.01531.11827.55522.06423.85220.56320.72517.17920.48420.37418.61119.45518.59417.4519.4615.97815.73814.74613.38310.58814.65512.75812.2529.96811.6018.87412.18311.16911.95911.1211.18811.83811.1458.03
us-gaap:ShareBasedCompensation █▅▃▃█▃▄▄▇▄▅▃▆▅▄▃▄▂▂▂▃▃▁▂▂▃▂▂▃▂▁▁▂▃▂▂▂▃▂▂▂▃▁▁1.611.150.8260.8681.5790.850.990.9811.5170.9151.0640.7691.3511.0410.9870.7860.9170.6430.6570.6750.7680.8650.4620.6660.6230.7390.6370.5790.8190.6770.5390.5340.6290.760.6670.6270.6980.8530.5660.5650.6360.7160.460.463NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities █▄▆▇▁▅▇█▇▆▅▆▅▆▅▇▆▅▆▆▆▆▆▆▆▇▇▅▆▅▆▅▆▇▇▆▅▅▆▇▆▆▅▇63.376-174.493-37.84918.109-376.333-92.13834.10272.289-19.498-66.733-127.433-60.132-130.51-69.436-109.774-15.879-65.931-125.185-67.219-66.097-77.733-27.837-65.5-74.179-76.14710.285-17.158-94.619-64.472-110.857-63.036-102.556-35.93-7.0745.057-59.244-88.609-122.875-72.45620.997-56.24-82.129-116.363-21.494NA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▄▂▄▃▃▂▄▄▃▃▃▂▃▃▆▄█▅▄▂▁▃▃▂▃▁▂▂▁▂▃▂▃▁▁▁▁▃▂▃▁▂▂▁4.4462.5244.3033.0973.4371.7494.834.7963.2443.7132.9832.4162.9042.8036.4374.4618.7255.4574.3732.0191.2532.753.6422.3093.0561.4811.6912.0721.462.4553.1721.92.7431.4781.3121.0621.1272.7622.3842.7191.2191.9951.881.506NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▅▂▃█▅▁▁▂▃▃▂▄▂▂▂▃▂▂▃▃▂▃▂▄▂▂▂▃▃▂▂▃▂▂▂▃▂▂▂▃▂▂▂373.426579.73212.635120.0231013.635422.944-181.686-199.127-29.73474.38488.998-48.277254.307-12.01521.143-0.39570.40418.729-55.05166.037200.633-52.73963.469-95.472285.202-39.69-55.39120.387102.19897.102-54.12829.01127.849-34.61919.84949.866120.24311.99955.2829.919177.424-52.104-4.712-65.085NA
us-gaap:RepaymentsOfLongTermDebt ███▁4.6874.6884.6870.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividendsCommonStock ████████▆▅▅▅▅▃▃▃▃▃▃▃▃▂▂▂▂▁▁▁▁▁▁▁15.85215.16415.15915.15415.40115.12615.12215.10112.3810.67110.46610.46210.4558.7848.788.7788.6557.8327.6327.637.6266.8236.8156.8026.7955.765.7395.7375.735.2375.0525.038NANA9.334.5414.5384.0854.0784.0784.0633.8193.8183.816NA
us-gaap:PaymentsForRepurchaseOfCommonStock NANA0.00.021.86573.226NANA0.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:DerivativeInstrumentRisk,us-gaap:LongtermDebtType indb:CapitalTrustVPreferredSecuritiesDueIn2037,us-gaap:InterestRateSwap,us-gaap:JuniorSubordinatedDebtNANA2.84e-06NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType indb:CapitalTrustVPreferredSecuritiesDueIn2037,us-gaap:JuniorSubordinatedDebtNANA1.7e-06NANANA3.3700000000000004e-08NANANA4.27e-08NANANA3.0700000000000004e-08NANANA2.44e-08NANANA6.519999999999999e-08NANANA6.519999999999999e-08NANANA6.519999999999999e-08NANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType us-gaap:LongTermDebt,us-gaap:LongTermDebtNANA1.4e-06NANANA3.19e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType,us-gaap:VariableRate indb:CentralBancorpCapitalTrustIiSecuritiesDueIn2037,us-gaap:JuniorSubordinatedDebt,us-gaap:LondonInterbankOfferedRateLIBORNANA1.87e-06NANANA3.54e-08NANANA4.44e-08NANANA3.24e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value329000.0329000.0328000.0328000.0328000.0331000.0342000.0342000.0342000.0280000.0279000.0274000.0274000.0273000.0273000.0273000.0272000.0269000.0268000.0261000.0261000.0261000.0260000.0260000.0259000.0259000.0237000.0237000.0236000.0236000.0235000.0227000.0226000.0226000.0225000.0214000.0214000.0213000.0213000.0212000.0212000.0210000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value33333232342827272626262626262623232323232222222221212121212121
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value333332323426262623232323232222222221212121212121
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Common
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-31
Value32323334343428282727272727272727262626262626262323232323222221
Percentage of CommonStockSharesOutstanding100.00.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value33333232343434342827272727272727272626262626262625242423232323222222212121212121212121
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value33323232343434342827272727272727272626262626262624232323232322222222212121212121212020
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount indb:StockOptions

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EmployeeStockOption


Antidilutive
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value10000.010000.005000.0000181.0143.00004293.002252.00
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.00.0100.00.00.00.0100.0100.00.00.00.0100.00.0100.00.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.141.261.051.060.760.781.381.510.891.251.081.21.131.00.80.870.750.770.640.780.770.710.740.710.670.380.670.660.620.560.450.640.560.540.450.540.410.570.520.560.520.530.550.530.38
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.141.261.051.060.760.781.381.510.891.251.071.21.131.00.80.870.750.760.640.780.770.710.740.710.670.380.660.660.610.560.450.640.560.540.450.530.410.560.520.560.520.520.550.530.38
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Tier One Risk Based Capital To Risk Weighted Assets

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets dei:LegalEntity

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets

indb:RocklandTrustCompany


Tier
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value13.290.13230.12710.12220.11980.11820.1040.10630.10210.1013
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:ConsolidatedEntities


Tier
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value13.340.13530.12990.12310.1199
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets100.4102.3102.2100.7100.1

Capital To Risk Weighted Assets

us-gaap:CapitalToRiskWeightedAssets dei:LegalEntity

us-gaap:CapitalToRiskWeightedAssets

indb:RocklandTrustCompany


Capital
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value14.540.140.13660.13190.13010.12840.11980.12420.12070.1217
Percentage of CapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:ConsolidatedEntities


Capital
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value15.130.14830.14450.13820.136
Percentage of CapitalToRiskWeightedAssets104.1105.9105.8104.8104.5

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value39282631275839574443413029221924212112202222172015111515181510149.83129.032128.37212118.5841011136.918
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating41.328.327.632.327.054.334.747.736.647.347.136.836.930.427.233.831.233.319.532.736.238.329.533.326.719.828.928.433.429.819.429.419.124.217.625.417.326.922.817.521.023.927.713.7

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value505345463228616840463842403436363129243029272726241322222018131917161315121615161515151410
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating51.753.846.747.132.726.954.457.633.351.143.451.951.046.650.750.945.946.239.248.648.945.346.343.941.823.640.540.738.135.425.439.133.132.225.531.525.035.231.933.930.731.430.829.320.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value117.7792.148141710118.2589.9699.2496.8281412109.0147.6989.7939.5088.4288.2687.8677.2133.8696.2016.4155.9345.352.7865.2994.2854.1143.1273.6873.2384.6214.2484.6074.0924.2013.5513.6662.215
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating11.47.82.012.614.28.212.69.412.011.79.320.517.715.814.012.115.715.514.113.813.112.26.911.311.810.910.15.310.48.38.16.17.66.79.78.89.48.38.67.17.24.3

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3.3484.0535.3627.0368.867131315169.0187.6186.6415.9995.2785.0444.7054.3784.2074.6764.644.6274.854.9855.1835.2695.185.0074.8055.2325.3745.6665.8315.885.9585.9355.7175.7985.9436.5287.2617.3987.4858.5839.39110
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating3.54.15.57.28.912.212.112.613.29.98.78.07.67.26.96.66.46.57.47.47.68.18.38.68.99.29.18.89.610.110.811.411.411.711.511.812.012.413.514.815.015.317.218.619.8

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value93959190919499104106828076736867676360585756545455535149494947464545444542424141414241414141
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating96.595.994.592.891.187.887.987.486.890.191.392.092.492.893.193.493.693.592.692.692.491.991.791.491.190.890.991.290.489.989.288.688.688.388.588.288.087.686.585.285.084.782.881.480.2

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value374134342426475130352933312722232020172020181918179.4615151413101412129.968118.874121111111111118.03
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating38.941.935.835.624.924.941.843.325.138.534.139.839.337.430.333.230.232.227.132.933.331.232.530.929.616.829.128.927.225.320.128.724.824.119.423.918.325.523.124.422.522.923.722.015.6

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value374134342426475130352933312722232020172020181918179.4615151413101412129.969118.87412111111111111
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating38.941.935.835.624.924.941.843.325.138.534.139.839.337.430.333.230.232.227.132.933.331.232.530.929.616.829.128.927.225.320.128.724.824.119.423.918.325.523.124.422.522.923.722.0
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-1.593-6.583-3.655-2.7290.19722-4.5743.038.593.2855.131-0.405-0.1120.2150.4350.109
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-1.6-6.6-3.8-2.80.221.4-4.02.57.03.65.8-0.5-0.10.30.60.2

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value2.41-13.538-7.937-3.2132.11731-8.0335.246148.05411-2.55-1.919-5.136-2.2470.3750.680.698-4.837-0.0831.7714.264-1.7691.453-1.7231.719-0.128-0.3113.3612.38-0.3740.337-2.9280.057-0.9370.741-0.5020.658-0.126-3.375-0.734
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating2.5-13.6-8.2-3.32.129.4-7.14.411.58.813.1-3.1-2.4-7.0-3.10.51.01.1-7.6-0.12.97.1-3.02.4-2.93.0-0.2-0.66.24.5-0.70.7-5.70.1-1.81.5-1.01.4-0.3-6.9-1.5

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:OtherComprehensiveIncomeLocation

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value0.210.819-2.8060.2250.225-0.772-1.4550.0410.040.041.2070.1170.1170.117-0.4940.0780.0780.078-0.1020.0590.0610.060.2550.110.1230.076-2.249-0.039-0.039-0.0390.7850.030.0420.001-0.0950.023
Percentage of OtherComprehensiveIncomeLossNetOfTax8.7-6.035.4-7.010.6-2.418.10.80.30.510.5-4.6-6.1-2.322.020.811.511.22.1-71.13.41.4-14.47.6-7.14.41757.012.5-1.2-1.6-209.98.9-1.41.810.13.1
Percentage of InterestAndDividendIncomeOperating0.20.8-2.90.20.2-0.7-1.30.00.00.01.40.10.10.2-0.70.10.10.1-0.20.10.10.10.40.20.20.1-4.1-0.1-0.1-0.11.50.10.10.0-0.20.0
Percentage of InterestAndDividendIncomeOperating us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1.593-6.583-3.655-2.7290.19722-4.5743.038.593.2855.165-0.361-0.0680.259
Percentage of OtherComprehensiveIncomeLossNetOfTax-66.148.646.184.99.372.856.957.861.040.844.914.23.5-5.0
Percentage of InterestAndDividendIncomeOperating-1.6-6.6-3.8-2.80.221.4-4.02.57.03.65.9-0.4-0.10.4
Percentage of InterestAndDividendIncomeOperating us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value3.793-7.774-1.476-0.7091.6959.347-2.0042.1755.4454.7295.153-2.262-1.924-5.468-2.1880.1880.7920.531-6.252-0.8161.8544.081-2.6271.211-2.2281.5611.95-0.852.3951.917-1.987-0.146-4.591-0.777-1.6780.837
Percentage of OtherComprehensiveIncomeLossNetOfTax157.457.418.622.180.129.624.941.538.758.744.888.7100.3106.597.450.1116.576.1129.3983.1104.795.7148.583.3129.390.8-1523.4273.371.380.5531.3-43.3156.8-1363.2179.1113.0
Percentage of InterestAndDividendIncomeOperating3.9-7.8-1.5-0.71.78.7-1.81.84.55.25.9-2.7-2.4-7.4-3.00.31.20.8-9.9-1.33.06.8-4.42.0-3.82.83.6-1.64.43.6-3.8-0.3-8.9-1.5-3.31.7
Percentage of InterestAndDividendIncomeOperating us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value2.41-13.538-7.937-3.2132.11731-8.0335.246148.05411-2.55-1.919-5.136-2.2470.3750.680.698-4.837-0.0831.7714.264-1.7691.453-1.7231.719-0.128-0.3113.3612.38-0.3740.337-2.9280.057-0.9370.741
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating2.5-13.6-8.2-3.32.129.4-7.14.411.58.813.1-3.1-2.4-7.0-3.10.51.01.1-7.6-0.12.97.1-3.02.4-2.93.0-0.2-0.66.24.5-0.70.7-5.70.1-1.81.5
Percentage of InterestAndDividendIncomeOperating 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

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

indb:ATMCharge


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.7350.6250.6040.7080.5250.6390.7630.9390.8560.6660.7460.8250.7360.6540.6770.815
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.80.60.60.70.50.60.70.80.70.70.81.00.90.90.91.1
Percentage of InterestAndDividendIncomeOperating indb:ATMCharge0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

indb:CreditCardIncome


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.3130.2360.2280.2160.1510.1830.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax42.637.837.730.528.828.60.00.0
Percentage of InterestAndDividendIncomeOperating0.30.20.20.20.20.20.00.0
Percentage of InterestAndDividendIncomeOperating indb:CreditCardIncome0.00.00.00.00.00.00.00.0

indb:InvestmentAdvisoryRetailInvestmentandInsuranceService


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.8450.9020.6920.5740.4690.540.8170.5530.730.6790.7630.6520.7390.560.6090.565
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax115.0144.3114.681.189.384.5107.158.985.3102.0102.379.0100.485.690.069.3
Percentage of InterestAndDividendIncomeOperating0.90.90.70.60.50.50.70.50.60.70.90.80.90.80.80.8
Percentage of InterestAndDividendIncomeOperating indb:InvestmentAdvisoryRetailInvestmentandInsuranceService0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

indb:MerchantProcessing


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.3390.320.2990.330.2770.3930.3410.230.3240.280.3950.2270.3480.4310.3250.337
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax46.151.249.546.652.861.544.724.537.942.052.927.547.365.948.041.3
Percentage of InterestAndDividendIncomeOperating0.40.30.30.30.30.40.30.20.30.30.40.30.40.60.40.5
Percentage of InterestAndDividendIncomeOperating indb:MerchantProcessing0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CreditCardMerchantDiscount


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2.1411.9031.8992.0254.5364.1044.7894.9134.8253.7354.1663.9433.9193.4053.623.597
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax291.3304.5314.4286.0864.0642.3627.7523.2563.7560.8558.4477.9532.5520.6534.7441.3
Percentage of InterestAndDividendIncomeOperating2.21.92.02.14.53.84.24.14.04.14.74.85.04.65.05.0
Percentage of InterestAndDividendIncomeOperating us-gaap:CreditCardMerchantDiscount0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DepositAccount


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3.8223.5843.8943.4282.8294.975.2555.2995.084.4064.6874.6584.5514.4314.4854.401
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax520.0573.4644.7484.2538.9777.8688.7564.3593.5661.6628.3564.6618.3677.5662.5540.0
Percentage of InterestAndDividendIncomeOperating4.03.64.03.52.84.64.64.44.24.85.35.65.76.06.26.1
Percentage of InterestAndDividendIncomeOperating us-gaap:DepositAccount0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InvestmentAdvisoryManagementAndAdministrativeService


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value8.0277.4027.0446.9976.8276.2896.8136.6356.4236.0695.8645.9126.0835.5825.6175.402
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1092.11184.31166.2988.31300.4984.2892.9706.6750.4911.3786.1716.6826.5853.5829.7662.8
Percentage of InterestAndDividendIncomeOperating8.37.47.37.16.85.96.05.55.36.66.77.17.77.67.77.5
Percentage of InterestAndDividendIncomeOperating us-gaap:InvestmentAdvisoryManagementAndAdministrativeService0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value141941377313204131731302211980113951153811603899788518375838180908082805280177738770975027418718972107135719569116364638463486225609958955852572157565192512449854970489948424695
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

srt:ParentCompany


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value1864191111951060
Percentage of Assets14.116.813.513.1
Percentage of Assets14.116.813.513.1
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value124521205811501114831135010300968798569967789277787377740371347138712171026860684466836614640164386376645261785724575757315623550753395308518352274699464045064501443843874259
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets87.787.587.187.287.286.085.085.485.987.787.988.188.388.288.388.488.688.788.889.189.289.089.389.489.789.489.990.290.390.390.390.690.790.690.890.590.690.490.690.690.690.7

us-gaap:Liabilities us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value161203121116
Percentage of Liabilities1.42.11.61.6
Percentage of Assets1.21.81.41.4
Percentage of Assets srt:ParentCompany8.710.610.211.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value141941377313204131731302211980113951153811603899788518375838180908082805280177738770975027418718972107135719569116364638463486225609958955852572157565192512449854970489948424695
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-312018-12-312017-12-31
Value1864191111951060
Percentage of LiabilitiesAndStockholdersEquity14.116.813.513.1
Percentage of Assets14.116.813.513.1
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value17411715170216891671167917081682163611041073998977956943931914877864818803788771759743732640627616602591555543537529492483478469461455447436425422412305
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.312.512.912.812.814.015.014.614.112.312.111.911.711.811.711.611.411.311.210.910.811.010.710.610.310.610.19.89.79.79.79.49.39.49.29.59.49.69.49.49.40.09.30.00.00.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value170217081073943
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets12.915.012.111.7
Percentage of Assets srt:ParentCompany91.389.489.889.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

indb:HeldInRabbiTrustAtCost


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value-3.116-3.08-3.066-4.712-4.649-4.604-4.735-4.713-4.648-4.599-4.718-4.784-4.653-4.591-4.59-4.505-4.414-4.33-4.277-4.199-4.113-4.031-3.958-3.883-3.785-3.7-3.666-3.591-3.528-3.456-3.404-3.344-3.294-3.198-3.179-3.103-3.078-2.996-2.98-2.884-2.857-2.752-2.738-2.632-2.611-2.482-2.267
Percentage of StockholdersEquity-0.2-0.2-0.2-0.3-0.3-0.3-0.3-0.3-0.3-0.4-0.4-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.7
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.10.0-0.10.00.00.00.0
Percentage of Assets indb:HeldInRabbiTrustAtCost0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value2927404851491826206.881-1.173-12.664-10.114-8.195-1.8310.4160.041-0.639-1.3373.53.5831.812-2.452-0.683-2.136-0.413-2.132-2.004-1.693-5.054-7.434-7.06-7.397-4.469-4.526-3.589-4.33-3.828-4.486-4.36-0.985-0.251-0.766-2.7541.4732.753-9.87
Percentage of StockholdersEquity1.71.62.42.93.13.01.11.61.30.6-0.1-1.3-1.0-0.9-0.20.00.0-0.1-0.20.40.40.2-0.3-0.1-0.3-0.1-0.3-0.3-0.3-0.8-1.3-1.3-1.4-0.8-0.9-0.7-0.9-0.8-1.0-0.9-0.2-0.1-0.2-0.60.30.7-3.2
Percentage of Assets0.20.20.30.40.40.40.20.20.20.1-0.0-0.2-0.1-0.1-0.00.00.0-0.0-0.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.00.0-0.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value948946945944942962103510331029527527483481479479477476452451409408406405404401399311308307306305274272270269237236235233232231230226226225225137
Percentage of StockholdersEquity54.455.155.555.956.457.360.661.562.947.849.248.449.350.250.851.352.151.552.250.150.851.652.653.254.054.648.749.249.950.851.649.450.150.451.048.348.949.249.950.550.951.551.953.253.554.545.0
Percentage of Assets6.76.97.27.27.28.09.19.08.95.96.05.85.85.95.95.95.95.85.95.55.55.75.65.75.65.84.94.84.84.95.04.74.74.74.74.64.64.74.74.84.80.04.80.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value0.3290.3290.3280.3280.3280.3310.3420.3420.3420.280.2790.2740.2740.2730.2730.2730.2720.2690.2680.2610.2610.2610.260.260.2590.2590.2370.2370.2360.2360.2350.2270.2260.2260.2250.2140.2140.2130.2130.2120.2120.2120.210.210.210.2090.163
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DeferredCompensationShareBasedPayments


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-31
Value3.1163.083.0664.7124.6494.6044.7354.7134.6484.5994.7184.7844.6534.5914.594.5054.4144.334.2774.1994.1134.0313.9583.8833.7853.73.6663.5913.5283.4563.4043.3443.1792.98
Percentage of StockholdersEquity0.20.20.20.30.30.30.30.30.30.40.40.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.60.60.60.60.60.60.60.6
Percentage of Assets0.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:DeferredCompensationShareBasedPayments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value763741716696676667654621585569546527504484465452437425414404391379368355343333330320310301293288278270263258251247239232224217210201194184177
Percentage of StockholdersEquity43.843.242.141.240.539.738.337.035.851.650.952.851.750.749.448.647.848.547.949.548.748.147.746.846.245.551.651.150.350.049.651.951.350.449.852.452.051.651.050.449.348.548.247.446.144.758.1
Percentage of Assets5.45.45.45.35.25.65.75.45.06.36.26.36.06.05.85.65.55.55.45.45.35.35.15.04.84.85.25.04.94.84.84.94.84.74.65.04.95.04.84.74.60.04.50.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Tier One Risk Based Capital

us-gaap:TierOneRiskBasedCapital dei:LegalEntity

us-gaap:TierOneRiskBasedCapital

indb:RocklandTrustCompany


Tier
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value12061205872784725660527498451385
Percentage of TierOneRiskBasedCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.110.69.99.79.49.28.38.27.87.7
Percentage of Assets indb:RocklandTrustCompany0.00.00.00.00.00.00.00.00.00.0

us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities

us-gaap:ConsolidatedEntities


Tier
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value12111232892789727
Percentage of TierOneRiskBasedCapital100.4102.3102.3100.8100.2
Percentage of Assets9.210.810.19.89.4
Percentage of Assets us-gaap:ConsolidatedEntities0.00.00.00.00.0

Cash

us-gaap:Cash us-gaap:ConsolidatedEntities

us-gaap:Cash

srt:ParentCompany


Cashus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value1001356448
Percentage of Cash100.0100.0100.0100.0
Percentage of Assets0.81.20.70.6
Percentage of Assets srt:ParentCompany5.47.15.44.5

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value21621818217114613811911510290
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.92.12.11.91.91.91.91.81.8

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:Building


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value63625349433933322421
Percentage of PropertyPlantAndEquipmentGross29.428.529.028.729.728.427.928.423.723.7
Percentage of Assets0.50.50.60.60.60.50.50.50.40.4
Percentage of Assets us-gaap:Building0.00.00.00.00.00.00.00.00.00.0

us-gaap:EquipmentLeasedToOtherParty


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value10101010
Percentage of PropertyPlantAndEquipmentGross4.94.95.86.2
Percentage of Assets0.10.10.10.1
Percentage of Assets us-gaap:EquipmentLeasedToOtherParty0.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value81776662585549464338
Percentage of PropertyPlantAndEquipmentGross37.835.536.636.539.740.141.640.342.942.9
Percentage of Assets0.60.70.80.80.80.80.80.80.80.8
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.00.00.0

us-gaap:Land


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value32322423202015161411
Percentage of PropertyPlantAndEquipmentGross15.014.913.413.914.015.013.213.914.212.7
Percentage of Assets0.20.30.30.30.30.30.20.30.30.2
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value38352725242220201918
Percentage of PropertyPlantAndEquipmentGross17.916.215.114.716.616.517.317.519.320.7
Percentage of Assets0.30.30.30.30.30.30.30.30.30.4
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value100958576686255504642
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.81.00.90.90.90.90.80.80.9

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1293000.01392000.06200000.01428000.01433000.01531000.06800000.01567000.01572000.0857000.01030000.0507000.0512000.0
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value117115116121122121123125123989795959594949282787676767573747364646464645656555549494948474645
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.80.90.90.91.01.11.11.11.11.11.11.11.21.21.21.21.11.01.01.01.11.01.01.01.11.01.01.01.01.11.01.01.01.00.91.01.01.01.01.01.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value506506506506506506506504504256256231231231231231231221221201201201201201201201170170170170170150150150150127130130130130130129129
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.63.73.83.83.94.24.44.44.32.82.92.82.82.92.92.92.92.92.92.72.72.82.82.82.82.92.72.72.72.72.82.62.62.62.62.52.52.62.62.72.72.80.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2324252729159.3419.848119.885121110
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.30.20.10.10.20.20.20.20.2

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CoreDeposits


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2223252628138.6368.527109.26911109.66
Percentage of IntangibleAssetsNetExcludingGoodwill96.196.396.496.495.789.892.586.686.893.891.887.990.7
Percentage of Assets0.20.20.20.20.20.20.10.10.10.10.20.20.2
Percentage of Assets us-gaap:CoreDeposits0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value0.8920.9180.9440.9811.271.5580.7051.3211.5620.6161.0031.4250.988
Percentage of IntangibleAssetsNetExcludingGoodwill3.93.73.63.64.310.27.513.413.26.28.212.19.3
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value20212324252729313314157.3797.9188.4629.34110119.0879.8489.7511011111213139.88510111112101011119.4469.851010111112
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.20.20.20.20.20.30.30.30.20.20.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.3

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CoreDeposits


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2228138.6368.527109.26911109.66
Percentage of FiniteLivedIntangibleAssetsNet96.195.789.892.586.686.893.891.887.990.7
Percentage of Assets0.20.20.20.10.10.10.10.20.20.2
Percentage of Assets us-gaap:CoreDeposits0.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value0.8921.271.5580.7051.3211.5620.6161.0031.4250.988
Percentage of FiniteLivedIntangibleAssetsNet3.94.310.27.513.413.26.28.212.19.3
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312012-09-302011-12-31
Value529530532533535271241231212180182162137140
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.04.04.14.54.73.13.03.03.02.83.02.82.62.8

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value102.0148.255.475151418242516
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.10.10.20.20.30.40.40.3

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value495651513332
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.50.40.40.40.0

Equity Securities Fv Ni

us-gaap:EquitySecuritiesFvNi

us-gaap:EquitySecuritiesFvNi


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2222222120192121202019200.0
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.0

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

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:EquitySecurities


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value222222212019212120201920
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.2
Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:FairValueMeasurementsRecurring us-gaap:EquitySecurities0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsRecurring, us-gaap:EquitySecurities


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value222222212019212120201920
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.2
Percentage of Assets us-gaap:FairValueMeasurementsRecurring us-gaap:EquitySecurities0.00.00.00.00.00.00.00.00.00.00.00.0

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value49649655158758152734335230016613213612612212314614313415418619017715115514216014412212513210510811213814913913312412912610195
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.53.64.24.54.54.43.03.12.61.81.51.61.51.51.51.81.81.72.02.52.62.52.12.22.02.32.31.92.02.11.71.81.92.42.62.72.62.52.62.62.12.0

us-gaap:OtherAssets us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.6420.00.0370.0
Percentage of OtherAssets0.10.00.00.0
Percentage of Assets0.00.00.00.0
Percentage of Assets srt:ParentCompany0.00.00.00.0

Time Deposit Maturities Year One

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:TimeDepositMaturitiesYearOne


Time
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value7891097511393430488462559518476
Percentage of TimeDepositMaturitiesYearOne100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.09.65.84.95.66.87.39.29.09.6

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value23283237377474747474111108
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.30.30.60.70.60.60.81.31.3

us-gaap:LongTermDebt us-gaap:ConsolidatedEntities

srt:ParentCompany


Long
Period End2020-12-312019-12-312018-12-31
Value32740.0
Percentage of LongTermDebt100.0100.00.0
Percentage of Assets0.20.70.0
Percentage of Assets srt:ParentCompany1.83.90.0

us-gaap:LongTermDebt us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LineOfCredit, us-gaap:LongTermDebt, us-gaap:LongTermDebt


Long
Period End2020-12-312019-12-31
Value3275
Percentage of LongTermDebt100.1100.1
Percentage of Assets0.20.7
Percentage of Assets us-gaap:LineOfCredit us-gaap:LongTermDebt us-gaap:LongTermDebt0.00.0

us-gaap:LongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

indb:CentralBancorpCapitalTrustIiSecuritiesDueIn2037, us-gaap:JuniorSubordinatedDebt


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6.0836.0836.0836.0836.0836.3496.576.791
Percentage of LongTermDebt18.68.15.55.60.00.00.00.0
Percentage of Assets0.00.10.10.10.10.10.10.1
Percentage of Assets indb:CentralBancorpCapitalTrustIiSecuritiesDueIn2037 us-gaap:JuniorSubordinatedDebt0.00.00.00.00.00.00.00.0

us-gaap:LongTermDebt us-gaap:FairValueByLiabilityClass

us-gaap:LongTermDebt


Long
Period End2020-12-312019-12-31
Value3274
Percentage of LongTermDebt100.0100.0
Percentage of Assets0.20.7
Percentage of Assets us-gaap:LongTermDebt0.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value145187110107107108188153262181
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.61.31.31.41.53.02.54.63.7

us-gaap:LongTermDebtNoncurrent us-gaap:DebtInstrument, us-gaap:LongtermDebtType

indb:CapitalTrustVPreferredSecuritiesDueIn2037, us-gaap:JuniorSubordinatedDebt


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value51515151515151515151
Percentage of LongTermDebtNoncurrent35.427.546.447.847.847.527.333.519.628.4
Percentage of Assets0.40.50.60.60.70.70.80.80.91.0
Percentage of Assets indb:CapitalTrustVPreferredSecuritiesDueIn2037 us-gaap:JuniorSubordinatedDebt0.00.00.00.00.00.00.00.00.00.0

indb:CentralBancorpCapitalTrustISecuritiesDueIn2034, us-gaap:JuniorSubordinatedDebt


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value5.2585.2585.2585.2585.3025.2585.2585.2585.2580.0
Percentage of LongTermDebtNoncurrent3.62.84.74.94.94.82.83.42.00.0
Percentage of Assets0.00.00.10.10.10.10.10.10.10.0
Percentage of Assets indb:CentralBancorpCapitalTrustISecuritiesDueIn2034 us-gaap:JuniorSubordinatedDebt0.00.00.00.00.00.00.00.00.00.0

indb:CentralBancorpCapitalTrustIiSecuritiesDueIn2037, us-gaap:JuniorSubordinatedDebt


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value6.0836.0836.0836.0836.0816.3496.576.7917.0120.0
Percentage of LongTermDebtNoncurrent4.23.25.55.65.65.93.54.42.70.0
Percentage of Assets0.00.10.10.10.10.10.10.10.10.0
Percentage of Assets indb:CentralBancorpCapitalTrustIiSecuritiesDueIn2037 us-gaap:JuniorSubordinatedDebt0.00.00.00.00.00.00.00.00.00.0

Debt And Capital Lease Obligations

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:DebtAndCapitalLeaseObligations


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value171176181295295545303292499308258299300298323340320304335299298293344351386395406367345422448507557550591489476484537568535565
Percentage of DebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.31.42.22.34.62.72.54.33.42.93.63.63.74.04.24.03.94.44.04.04.14.84.95.45.76.45.75.46.87.48.69.59.610.39.49.39.710.811.611.112.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value10
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value8769000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value7237000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value6102000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value11
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.1

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value56585353350.0
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.00.0
Percentage of Assets0.40.50.50.50.40.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value60
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets0.5

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value3752000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value17411715170216891671167917081682163611041073998977956943931914877864818803788771759743732640627616602591555543537529492483478469461455447436425422412305
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.312.512.912.812.814.015.014.614.112.312.111.911.711.811.711.611.411.311.210.910.811.010.710.610.310.610.19.89.79.79.79.49.39.49.29.59.49.69.49.49.40.09.30.00.00.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value170217081073943
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets12.915.012.111.7
Percentage of Assets srt:ParentCompany91.389.489.889.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

indb:HeldInRabbiTrustAtCost


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value-3.116-3.08-3.066-4.712-4.649-4.604-4.735-4.713-4.648-4.599-4.718-4.784-4.653-4.591-4.59-4.505-4.414-4.33-4.277-4.199-4.113-4.031-3.958-3.883-3.785-3.7-3.666-3.591-3.528-3.456-3.404-3.344-3.294-3.198-3.179-3.103-3.078-2.996-2.98-2.884-2.857-2.752-2.738-2.632-2.611-2.482-2.267
Percentage of StockholdersEquity-0.2-0.2-0.2-0.3-0.3-0.3-0.3-0.3-0.3-0.4-0.4-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.7
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.10.0-0.10.00.00.00.0
Percentage of Assets indb:HeldInRabbiTrustAtCost0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value2927404851491826206.881-1.173-12.664-10.114-8.195-1.8310.4160.041-0.639-1.3373.53.5831.812-2.452-0.683-2.136-0.413-2.132-2.004-1.693-5.054-7.434-7.06-7.397-4.469-4.526-3.589-4.33-3.828-4.486-4.36-0.985-0.251-0.766-2.7541.4732.753-9.87
Percentage of StockholdersEquity1.71.62.42.93.13.01.11.61.30.6-0.1-1.3-1.0-0.9-0.20.00.0-0.1-0.20.40.40.2-0.3-0.1-0.3-0.1-0.3-0.3-0.3-0.8-1.3-1.3-1.4-0.8-0.9-0.7-0.9-0.8-1.0-0.9-0.2-0.1-0.2-0.60.30.7-3.2
Percentage of Assets0.20.20.30.40.40.40.20.20.20.1-0.0-0.2-0.1-0.1-0.00.00.0-0.0-0.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.00.0-0.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value948946945944942962103510331029527527483481479479477476452451409408406405404401399311308307306305274272270269237236235233232231230226226225225137
Percentage of StockholdersEquity54.455.155.555.956.457.360.661.562.947.849.248.449.350.250.851.352.151.552.250.150.851.652.653.254.054.648.749.249.950.851.649.450.150.451.048.348.949.249.950.550.951.551.953.253.554.545.0
Percentage of Assets6.76.97.27.27.28.09.19.08.95.96.05.85.85.95.95.95.95.85.95.55.55.75.65.75.65.84.94.84.84.95.04.74.74.74.74.64.64.74.74.84.80.04.80.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value0.3290.3290.3280.3280.3280.3310.3420.3420.3420.280.2790.2740.2740.2730.2730.2730.2720.2690.2680.2610.2610.2610.260.260.2590.2590.2370.2370.2360.2360.2350.2270.2260.2260.2250.2140.2140.2130.2130.2120.2120.2120.210.210.210.2090.163
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DeferredCompensationShareBasedPayments


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-31
Value3.1163.083.0664.7124.6494.6044.7354.7134.6484.5994.7184.7844.6534.5914.594.5054.4144.334.2774.1994.1134.0313.9583.8833.7853.73.6663.5913.5283.4563.4043.3443.1792.98
Percentage of StockholdersEquity0.20.20.20.30.30.30.30.30.30.40.40.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.60.60.60.60.60.60.60.6
Percentage of Assets0.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:DeferredCompensationShareBasedPayments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value763741716696676667654621585569546527504484465452437425414404391379368355343333330320310301293288278270263258251247239232224217210201194184177
Percentage of StockholdersEquity43.843.242.141.240.539.738.337.035.851.650.952.851.750.749.448.647.848.547.949.548.748.147.746.846.245.551.651.150.350.049.651.951.350.449.852.452.051.651.050.449.348.548.247.446.144.758.1
Percentage of Assets5.45.45.45.35.25.65.75.45.06.36.26.36.06.05.85.65.55.55.45.45.35.35.15.04.84.85.25.04.94.84.84.94.84.74.65.04.95.04.84.74.60.04.50.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

srt:CumulativeEffectPeriodOfAdoptionAdjustment, us-gaap:RetainedEarnings


Stockholders
Period End2020-12-312020-09-302017-12-31
Value1553000.01553000.0831000.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0
Percentage of Assets0.00.00.0
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment us-gaap:RetainedEarnings0.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value329000.0329000.0328000.0328000.0328000.0331000.0342000.0342000.0342000.0280000.0279000.0274000.0274000.0273000.0273000.0273000.0272000.0269000.0268000.0261000.0261000.0261000.0260000.0260000.0259000.0259000.0237000.0237000.0236000.0236000.0235000.0227000.0226000.0226000.0225000.0214000.0214000.0213000.0213000.0212000.0212000.0210000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value948946945944942962103510331029527527483481479479477476452451409408406405404401399311308307306305274272270269237236235233232231226
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.76.97.27.27.28.09.19.08.95.96.05.85.85.95.95.95.95.85.95.55.55.75.65.75.65.84.94.84.84.95.04.74.74.74.74.64.64.74.74.84.84.8

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value763741716696676667654621585569546527504484465452437425414404391379368355343333330320310301293288278270263258251247239232224210
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.45.45.45.35.25.65.75.45.06.36.26.36.06.05.85.65.55.55.45.45.35.35.15.04.84.85.25.04.94.84.84.94.84.74.65.04.95.04.84.74.64.5

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2927404851491826206.881-1.173-12.664-10.114-8.195-1.8310.4160.041-0.639-1.3373.53.5831.812-2.452-0.683-2.136-0.413-2.132-2.004-1.693-5.054-7.434-7.06-7.397-4.469-4.526-3.589-4.33-3.828-4.486-4.36-0.985-0.251-0.7662.753
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.30.40.40.40.20.20.20.1-0.0-0.2-0.1-0.1-0.00.00.0-0.0-0.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.00.0-0.00.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:OtherComprehensiveIncomeLocation

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value-4.807-5.017-5.836-3.03-3.255-3.48-2.708-1.253-1.294-1.334-1.374-2.581-2.698-2.815-2.412-1.918-1.996-2.074-2.152-2.05-2.109-2.17-2.23-2.485-2.595-2.718-2.794-0.545-0.506-0.467-0.428-1.213-1.243-1.285-1.286-1.191-1.214-1.26
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-16.3-18.5-14.3-6.2-6.3-7.0-14.9-4.8-6.2-19.4117.120.426.734.4131.7-461.1-4868.3324.6161.0-58.6-58.9-119.890.9363.8121.5658.1131.127.229.99.25.817.216.828.828.433.228.028.1
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2526333639391621189.4336.1480.9831.3441.4120.9480.4770.361
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax84.998.381.875.976.579.490.780.386.0137.1-524.1-7.8-13.3-17.2-51.8114.7-27.0
Percentage of Assets0.20.20.30.30.30.30.10.20.20.10.10.00.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges


Accumulated
Period End2020-12-312019-12-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value33166.1481.3441.4120.9480.4770.3320.4860.361-1.192-1.902-1.794-1.955-2.594-2.762-3.179-3.298-3.504-4.119-5.159-5.698-6.562-7.051-8.708-9.577-10.449-10.366-10.804
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax81.890.7-524.1-13.3-17.2-51.8114.7809.8-76.1-27.0-34.1-53.1-99.079.7379.8129.3769.7154.7174.9243.3102.176.692.995.3194.9211.6291.1239.4240.8
Percentage of Assets0.30.10.10.00.00.00.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.2
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value9.2745.481131415134.3986.4024.227-1.218-5.947-11.1-8.838-6.914-0.5041.6841.4960.7040.1736.4257.2415.3871.3063.9332.7224.953.3891.4392.289-0.106-2.023-0.0360.114.7015.4787.1566.3196.574
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax31.420.232.630.329.827.624.224.420.2-17.7507.087.787.484.427.5404.83648.8-110.2-12.9183.6202.1297.3-53.3-575.8-127.4-1198.5-159.0-71.8-135.22.127.20.5-1.5-105.2-121.0-199.4-145.9-146.5
Percentage of Assets0.10.00.10.10.10.10.00.10.0-0.0-0.1-0.1-0.1-0.1-0.00.00.00.00.00.10.10.10.00.10.00.10.10.00.0-0.0-0.0-0.00.00.10.10.10.10.1
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1610000.01150000.0826000.0868000.01579000.0850000.0990000.0981000.01517000.0915000.01064000.0769000.01351000.01041000.0987000.0786000.0917000.0643000.0657000.0675000.0768000.0865000.0462000.0666000.0623000.0739000.0637000.0579000.0819000.0677000.0539000.0534000.0629000.0760000.0667000.0627000.0698000.0853000.0566000.0565000.0636000.0716000.0460000.0463000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1610000.01150000.0826000.0868000.01579000.0850000.0990000.0981000.01517000.0915000.01064000.0769000.01351000.01041000.0987000.0786000.0917000.0643000.0657000.0675000.0768000.0865000.0462000.0666000.0623000.0739000.0637000.0579000.0819000.0677000.0539000.0534000.0629000.0760000.0667000.0627000.0698000.0853000.0566000.0565000.0636000.0716000.0460000.0463000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value50675324-2.959-10.40379152-49.0283438363333423911375325121.5432724307.425252815142643452612-0.608209.16419-3.372-0.589395.23225
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating52.067.755.624.7-3.0-9.769.7127.1-40.137.343.343.642.645.958.354.617.358.184.441.320.42.645.940.251.613.246.552.829.227.850.085.887.751.323.7-1.343.319.241.0-6.9-1.281.010.550.4

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value63-174.493-37.84918-376.333-92.1383472-19.498-66.733-127.433-60.132-130.51-69.436-109.774-15.879-65.931-125.185-67.219-66.097-77.733-27.837-65.5-74.179-76.14710-17.158-94.619-64.472-110.857-63.036-102.556-35.93-7.0745.057-59.244-88.609-122.875-72.45620-56.24-82.129-116.363-21.494
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating65.5-175.1-39.118.5-376.5-85.830.060.4-16.0-72.9-145.0-72.6-164.9-94.2-150.6-22.1-96.8-194.4-106.0-106.1-127.1-46.6-109.4-123.2-129.018.2-31.3-174.0-118.8-209.2-119.9-201.0-69.8-13.99.8-122.0-183.0-257.1-149.842.9-113.7-167.8-232.9-42.5

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value373579121201013422-181.686-199.127-29.7347488-48.277254-12.01521-0.3957018-55.05166200-52.73963-95.472285-39.69-55.3912010297-54.12829127-34.6191949120115529177-52.104-4.712-65.085
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating386.2581.813.1122.61014.0393.9-159.8-166.5-24.381.3101.2-58.3321.2-16.329.0-0.6103.329.1-86.8106.0328.0-88.3106.0-158.5483.3-70.3-101.037.5188.3183.3-103.056.9248.3-68.138.6102.7248.325.1114.361.1358.6-106.4-9.4-128.7

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value48747228162634320-68.29825-98.2641
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating503.7474.429.5165.8634.6298.4-60.121.1-80.445.7

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-0.0980.567-20.308-0.243-0.0633.10810-0.228-0.140.539-4.673-0.107-0.0760.3598.768-0.199-0.0670.709-0.319-0.101-0.0470.4624.8480.04.7330.6392.381-0.1040.0920.4712.5520.00.0030.002-1.891-0.009-0.01-0.0090.123-0.011-0.01-0.011-2.489-0.008
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value50675324-2.959-10.40379152-49.0283438363333423911375325121.5432724307.425252815142643452612-0.608209.16419-3.372-0.589395.23225
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating52.067.755.624.7-3.0-9.769.7127.1-40.137.343.343.642.645.958.354.617.358.184.441.320.42.645.940.251.613.246.552.829.227.850.085.887.751.323.7-1.343.319.241.0-6.9-1.281.010.550.4

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value374134342426475130352933312722232020172020181918179.4615151413101412129.968118.874121111111111118.03
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating38.941.935.835.624.924.941.843.325.138.534.139.839.337.430.333.230.232.227.132.933.331.232.530.929.616.829.128.927.225.320.128.724.824.119.423.918.325.523.124.422.522.923.722.015.6

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value374134342426475130352933312722232020172020181918179.4615151413101412129.969118.87412111111111111
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating38.941.935.835.624.924.941.843.325.138.534.139.839.337.430.333.230.232.227.132.933.331.232.530.929.616.829.128.927.225.320.128.724.824.119.423.918.325.523.124.422.522.923.722.0
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1610000.01150000.0826000.0868000.01579000.0850000.0990000.0981000.01517000.0915000.01064000.0769000.01351000.01041000.0987000.0786000.0917000.0643000.0657000.0675000.0768000.0865000.0462000.0666000.0623000.0739000.0637000.0579000.0819000.0677000.0539000.0534000.0629000.0760000.0667000.0627000.0698000.0853000.0566000.0565000.0636000.0716000.0460000.0463000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value63-174.493-37.84918-376.333-92.1383472-19.498-66.733-127.433-60.132-130.51-69.436-109.774-15.879-65.931-125.185-67.219-66.097-77.733-27.837-65.5-74.179-76.14710-17.158-94.619-64.472-110.857-63.036-102.556-35.93-7.0745.057-59.244-88.609-122.875-72.45620-56.24-82.129-116.363-21.494
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating65.5-175.1-39.118.5-376.5-85.830.060.4-16.0-72.9-145.0-72.6-164.9-94.2-150.6-22.1-96.8-194.4-106.0-106.1-127.1-46.6-109.4-123.2-129.018.2-31.3-174.0-118.8-209.2-119.9-201.0-69.8-13.99.8-122.0-183.0-257.1-149.842.9-113.7-167.8-232.9-42.5

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value4.4462.5244.3033.0973.4371.7494.834.7963.2443.7132.9832.4162.9042.8036.4374.4618.7255.4574.3732.0191.2532.753.6422.3093.0561.4811.6912.0721.462.4553.1721.92.7431.4781.3121.0621.1272.7622.3842.7191.2191.9951.881.506
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value373579121201013422-181.686-199.127-29.7347488-48.277254-12.01521-0.3957018-55.05166200-52.73963-95.472285-39.69-55.3912010297-54.12829127-34.6191949120115529177-52.104-4.712-65.085
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating386.2581.813.1122.61014.0393.9-159.8-166.5-24.381.3101.2-58.3321.2-16.329.0-0.6103.329.1-86.8106.0328.0-88.3106.0-158.5483.3-70.3-101.037.5188.3183.3-103.056.9248.3-68.138.6102.7248.325.1114.361.1358.6-106.4-9.4-128.7

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-30
Value4.6874.6884.6870.0
Percentage of RepaymentsOfLongTermDebt100.0100.0100.00.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value151515151515151512101010108.7848.788.7788.6557.8327.6327.637.6266.8236.8156.8026.7955.765.7395.7375.735.2375.0525.0389.334.5414.5384.0854.0784.0784.0633.8193.8183.816
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.021730.00.0
Percentage of PaymentsForRepurchaseOfCommonStock0.00.0100.0100.00.00.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument, us-gaap:DerivativeInstrumentRisk, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateStatedPercentage

indb:CapitalTrustVPreferredSecuritiesDueIn2037, us-gaap:InterestRateSwap, us-gaap:JuniorSubordinatedDebt


Debt
Period End2020-12-31
Value2.84
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations indb:CapitalTrustVPreferredSecuritiesDueIn2037 us-gaap:InterestRateSwap us-gaap:JuniorSubordinatedDebt0.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

indb:CapitalTrustVPreferredSecuritiesDueIn2037, us-gaap:JuniorSubordinatedDebt


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1.70.03370.04270.03070.02440.06520.06520.0652
Percentage of DebtInstrumentInterestRateStatedPercentage59.90.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations indb:CapitalTrustVPreferredSecuritiesDueIn2037 us-gaap:JuniorSubordinatedDebt0.00.00.00.00.00.00.00.0

us-gaap:LongTermDebt, us-gaap:LongTermDebt


Debt
Period End2020-12-312019-12-31
Value1.40.0319
Percentage of DebtInstrumentInterestRateStatedPercentage49.30.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations us-gaap:LongTermDebt us-gaap:LongTermDebt0.00.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:VariableRate

indb:CentralBancorpCapitalTrustIiSecuritiesDueIn2037, us-gaap:JuniorSubordinatedDebt, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.870.03540.04440.0324
Percentage of DebtInstrumentInterestRateStatedPercentage65.80.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations indb:CentralBancorpCapitalTrustIiSecuritiesDueIn2037 us-gaap:JuniorSubordinatedDebt us-gaap:LondonInterbankOfferedRateLIBOR0.00.00.00.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value1.124.310.238-24.43724.730.2463
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value47.6142.4937.2832.1629.9328.7629.3630.5
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value69613932494749
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value474000.0532000.0215000.0142000.0111000.081000.0055000.0126000.0111000.0226000.0
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value280000.0187000.0170000.0121000.069000.041000.0
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0

indb:CapitalcommitmentrelatingtoLowIncomeHousingProjectinvestmentsnoncash

indb:CapitalcommitmentrelatingtoLowIncomeHousingProjectinvestmentsnoncash


Capitalcommitmentrelatingto
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value10244.450.09131420150.0180.02.7680.0610.0040.009-0.2280.202-0.0140.065.017-0.0170.1430.037-0.4273.14-1.0550.0111.9990.00125
Percentage of CapitalcommitmentrelatingtoLowIncomeHousingProjectinvestmentsnoncash100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

indb:ChangeInFairValueOnLoansHeldForSale

indb:ChangeInFairValueOnLoansHeldForSale


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value305000.0-1764000.044000.0413000.0583000.0-914000.0-370000.0272000.0919000.01000.0-198000.0103000.070000.0-26000.0-11000.0-108000.0153000.0-147000.027000.047000.0-41000.054000.0-25000.0181000.0157000.027000.017000.0-223000.0174000.051000.0-273000.01600000.0-1195000.0-140000.0-929000.0676000.0381000.0-269000.0-73000.0282000.08000.0639000.0-820000.0
Percentage of ChangeInFairValueOnLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:ChangeInUnamortizedNetLoanCostsAndPremiums

indb:ChangeInUnamortizedNetLoanCostsAndPremiums


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value8.24104.0065.3423.3290.7352.8243.2393.570.4530.027
Percentage of ChangeInUnamortizedNetLoanCostsAndPremiums100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:FairValueInputsCumulativeDefault us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:ValuationTechnique

indb:FairValueInputsCumulativeDefault

srt:Maximum, us-gaap:FairValueInputsLevel3, indb:PooledTrustPreferredSecurities, us-gaap:IncomeApproachValuationTechnique


Fair
Period End2020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-31
Value099.001.01.01.01.00
Percentage of FairValueInputsCumulativeDefault0.0100.00.0100.0100.0100.0100.00.0

srt:Minimum, us-gaap:FairValueInputsLevel3, indb:PooledTrustPreferredSecurities, us-gaap:IncomeApproachValuationTechnique


Fair
Period End2020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-31
Value03.98-0.020.040.020.050.050
Percentage of FairValueInputsCumulativeDefault0.04.00.04.02.05.05.00.0

indb:FairValueInputsCumulativeDefault us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, us-gaap:IncomeApproachValuationTechnique


Fair
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value-0.111.767-0.0020.135-0.0010.1360.1610.027
Percentage of FairValueInputsCumulativeDefault0.011.90.013.50.013.616.10.0

indb:FairValueInputsCureGivenDefault us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:ValuationTechnique

indb:FairValueInputsCureGivenDefault

srt:Maximum, us-gaap:FairValueInputsLevel3, indb:PooledTrustPreferredSecurities, us-gaap:IncomeApproachValuationTechnique


Fair
Period End2020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-31
Value074.2500.750.750.750.750
Percentage of FairValueInputsCureGivenDefault0.0100.00.0100.0100.0100.0100.00.0

indb:FairValueInputsCureGivenDefault us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, us-gaap:IncomeApproachValuationTechnique


Fair
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value060.29100.60900.6090.6090
Percentage of FairValueInputsCureGivenDefault0.081.20.081.20.081.281.20.0

indb:FairValueInputsLossGivenDefault us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:ValuationTechnique

indb:FairValueInputsLossGivenDefault

srt:Maximum, us-gaap:FairValueInputsLevel3, indb:PooledTrustPreferredSecurities, us-gaap:IncomeApproachValuationTechnique


Fair
Period End2020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-31
Value099.001.01.01.01.00
Percentage of FairValueInputsLossGivenDefault0.0100.00.0100.0100.0100.0100.00.0

srt:Minimum, us-gaap:FairValueInputsLevel3, indb:PooledTrustPreferredSecurities, us-gaap:IncomeApproachValuationTechnique


Fair
Period End2020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-31
Value084.1500.850.850.850.850
Percentage of FairValueInputsLossGivenDefault0.085.00.085.085.085.085.00.0

indb:FairValueInputsLossGivenDefault us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, us-gaap:IncomeApproachValuationTechnique


Fair
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value093.0630.0010.9360.010.9210.9210.004
Percentage of FairValueInputsLossGivenDefault0.094.00.093.60.092.192.10.0

indb:FeesAndCommissionMortgageBanking

indb:FeesAndCommissionMortgageBanking


Fees
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2.7055.745.3787.7045.0050.8613.273.9683.410.8060.9411.2221.0380.871.3511.3381.3140.9572.1491.9631.3631.1321.3311.481.2261.1261.0051.0150.8770.4870.941.8431.6692.2811.4451.4631.331.560.9070.6831.0471.951.4690.622
Percentage of FeesAndCommissionMortgageBanking100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:FinancingReceivableAllowanceforCreditLossPeriodIncreaseDecreasebypercentage

indb:FinancingReceivableAllowanceforCreditLossPeriodIncreaseDecreasebypercentage


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value-4.8-5.2-3.33.10.214
Percentage of FinancingReceivableAllowanceforCreditLossPeriodIncreaseDecreasebypercentage100.0100.0100.0100.0100.0

indb:FinancingReceivableAllowanceforCreditLossesEffectofChangeinMethodnetoftax.

indb:FinancingReceivableAllowanceforCreditLossesEffectofChangeinMethodnetoftax.


Financing
Period End2020-09-302020-06-302020-03-31
Value817000.00817000.0
Percentage of FinancingReceivableAllowanceforCreditLossesEffectofChangeinMethodnetoftax.100.00.0100.0

indb:GainRealizedOnLifeInsurancePolicies

indb:GainRealizedOnLifeInsurancePolicies


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0258000.0352000.00335000.0357000.00434000.00001463000.000000000337000.01627000.0227000.0000
Percentage of GainRealizedOnLifeInsurancePolicies0.0100.0100.00.0100.0100.00.0100.00.00.00.0100.00.00.00.00.00.00.00.00.0100.0100.0100.00.00.00.0

indb:IncreaseDecreaseInFairValueOfUnhedgedDerivativeInstrumentsRelatingToResidentialLoans us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

indb:IncreaseDecreaseInFairValueOfUnhedgedDerivativeInstrumentsRelatingToResidentialLoans

us-gaap:Nondesignated, us-gaap:InterestIncome


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-1303000.0-2324000.0-648000.02027000.03347000.0-721000.0-638000.0366000.01488000.059000.025000.0-139000.0141000.012000.0-110000.0-33000.054000.050000.0-454000.0115000.0190000.0114000.0-117000.0174000.0-299000.0192000.06000.042000.041000.0-40000.0107000.0-1101000.0
Percentage of IncreaseDecreaseInFairValueOfUnhedgedDerivativeInstrumentsRelatingToResidentialLoans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:IncreaseDecreaseInFederalHomeLoanBankAdvancesLongTerm

indb:IncreaseDecreaseInFederalHomeLoanBankAdvancesLongTerm


Increase
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-11-092012-12-312012-09-302011-12-31
Value-10000000.00-10000000.0-15000000.00-5000000.0-20000000.00000000-14150000.000-51641000.0-2000000.0-4000000.00-3000000.000-5000000.000-70823000.011000.0-9134000.0-24991000.0-24991000.00-23000000.0
Percentage of IncreaseDecreaseInFederalHomeLoanBankAdvancesLongTerm100.00.0100.0100.00.0100.0100.00.00.00.00.00.00.00.0100.00.00.0100.0100.0100.00.0100.00.00.0100.00.00.0100.0100.0100.0100.0100.00.0100.0

indb:IncreaseDecreaseinDeferredCompensationandOtherRetirementBenefits us-gaap:StatementEquityComponents

indb:IncreaseDecreaseinDeferredCompensationandOtherRetirementBenefits

indb:HeldInRabbiTrustAtCost


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-30
Value-36000.0-14000.01646000.0-63000.0-45000.0131000.0-22000.0-65000.0-49000.0119000.066000.0-131000.0-62000.0-1000.0-85000.0-91000.0-84000.0-53000.0-78000.0-86000.0-82000.0-73000.0-75000.0-98000.0-85000.0-34000.0-63000.0
Percentage of IncreaseDecreaseinDeferredCompensationandOtherRetirementBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationShareBasedPayments


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-30
Value36000.014000.0-1646000.063000.045000.0-131000.022000.065000.049000.0-119000.0-66000.0131000.062000.01000.085000.091000.084000.053000.078000.086000.082000.073000.075000.098000.085000.034000.063000.0
Percentage of IncreaseDecreaseinDeferredCompensationandOtherRetirementBenefits-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

indb:InterchangeAndAtmFees

indb:InterchangeAndAtmFees


Interchange
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3.0682.722.683.0445.2144.8965.7056.1375.7944.5165.0274.9474.7694.1734.414.5254.4343.9224.164.194.1363.7243.9113.9493.7673.13.3033.3753.3222.9752.9492.8452.7612.3282.5942.4222.3992.3682.0522.0051.9741.7021.4731.2631.258
Percentage of InterchangeAndAtmFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:InvestmentinLowIncomeHousingProjects

indb:InvestmentinLowIncomeHousingProjects


Investmentin
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-06-302013-03-31
Value-2924000.0-6632000.0-2272000.0-1578000.0-8074000.0-5934000.0-6503000.0-2866000.0-391000.0-292000.0-836000.0-466000.0-919000.0-1213000.0-2932000.0-842000.0-434000.0-3437000.0-2153000.0-1042000.0-1783000.0-2648000.0-238000.0-2545000.0-7270000.0-5002000.0-5320000.0-1818000.0-1187000.0-2561000.0000
Percentage of InvestmentinLowIncomeHousingProjects100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

indb:IssuanceOfRestrictedStockAwardsNetofIssuanceCost

indb:IssuanceOfRestrictedStockAwardsNetofIssuanceCost


Issuance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value23000.01220000.01000.03000.051000.01132000.028000.04000.012000.01419000.0
Percentage of IssuanceOfRestrictedStockAwardsNetofIssuanceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:NetPurchasesfromStockOptionsExercised

indb:NetPurchasesfromStockOptionsExercised


Net
Period End2021-06-302021-03-312020-09-30
Value057000.0-140000.0
Percentage of NetPurchasesfromStockOptionsExercised0.0100.0100.0

indb:NonTaxableInterestAndDividendsOnSecurities

indb:NonTaxableInterestAndDividendsOnSecurities


Non
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value5000.05000.08000.09000.09000.09000.011000.014000.013000.013000.014000.014000.016000.016000.017000.019000.026000.026000.028000.028000.029000.032000.032000.031000.030000.034000.034000.036000.037000.037000.023000.010000.011000.011000.010000.020000.023000.029000.045000.078000.095000.0113000.0120000.0164000.0187000.0
Percentage of NonTaxableInterestAndDividendsOnSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:OffBalanceSheetCreditLossLiabilityChangeinMethodCreditLossExpenseReversalnetoftax.

indb:OffBalanceSheetCreditLossLiabilityChangeinMethodCreditLossExpenseReversalnetoftax.


Off
Period End2020-12-312020-09-302020-06-302020-03-31
Value000736000.0
Percentage of OffBalanceSheetCreditLossLiabilityChangeinMethodCreditLossExpenseReversalnetoftax.0.00.00.0100.0

indb:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForLossOnTerminationOfDerivativesAfterTax

indb:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForLossOnTerminationOfDerivativesAfterTax


Other
Period End2020-12-312020-09-30
Value0-492000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForLossOnTerminationOfDerivativesAfterTax0.0100.0

indb:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForLossOnTerminationOfDerivativesTax

indb:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForLossOnTerminationOfDerivativesTax


Other
Period End2020-12-312020-09-30
Value0-192000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForLossOnTerminationOfDerivativesTax0.0100.0

indb:OtherComprehensiveIncomeLossReclassificationAdjustmentfromAOCIforLossonTerminationofDerivativesbeforeTax

indb:OtherComprehensiveIncomeLossReclassificationAdjustmentfromAOCIforLossonTerminationofDerivativesbeforeTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312015-09-302015-06-302014-12-312014-09-302014-06-30
Value0-684000.0000000-1000.00-1122000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentfromAOCIforLossonTerminationofDerivativesbeforeTax0.0100.00.00.00.00.00.00.0100.00.0100.0

indb:OthernoninterestincomeASC606

indb:OthernoninterestincomeASC606


Othernoninterestincome
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
Value1245000.01125000.01584000.0905000.0534000.01212000.04628000.01487000.01642000.0939000.01246000.01152000.01060000.0974000.01300000.01188000.01259000.0822000.0
Percentage of OthernoninterestincomeASC606100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:PaymentsOnEarlyTerminationOfHedgingRelationship

indb:PaymentsOnEarlyTerminationOfHedgingRelationship


Payments
Period End2020-12-31
Value0
Percentage of PaymentsOnEarlyTerminationOfHedgingRelationship0.0

indb:ServiceChargesOnDepositAccounts

indb:ServiceChargesOnDepositAccounts


Service
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3.8223.5843.8943.4282.8294.975.2555.2995.084.4064.6874.6584.5514.4314.4854.4014.3924.5444.5224.6224.4714.474.6934.7544.4654.1664.5874.6564.4634.3594.7764.6044.3434.2174.1593.9593.9233.8894.2544.2234.1923.9594.0583.1783.257
Percentage of ServiceChargesOnDepositAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:SoftwareMaintenance

indb:SoftwareMaintenance


Software
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value1915000.01970000.02046000.01753000.01780000.01685000.01598000.01385000.01363000.01165000.01154000.01079000.0997000.0972000.0922000.0888000.0896000.0930000.0807000.0765000.0735000.0754000.0677000.0625000.0579000.0608000.0662000.0599000.0597000.0681000.0491000.0
Percentage of SoftwareMaintenance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:StockRepurchasedDuringPeriodValueasaresultofStockOptionsExercised

indb:StockRepurchasedDuringPeriodValueasaresultofStockOptionsExercised


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value057000.083000.0140000.026000.0
Percentage of StockRepurchasedDuringPeriodValueasaresultofStockOptionsExercised0.0100.0100.0100.0100.0

indb:StockRepurchasedDuringPeriodValueasaresultofStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value057000.083000.0140000.026000.0
Percentage of StockRepurchasedDuringPeriodValueasaresultofStockOptionsExercised0.0100.0100.0100.0100.0

indb:TotalnoninterestincomeinscopeofASC606

indb:TotalnoninterestincomeinscopeofASC606


Totalnoninterestincomeinscopeof
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
Value1716161516182320191617171716161616
Percentage of TotalnoninterestincomeinscopeofASC606100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:TotalnoninterestincomeoutofscopeofASC606

indb:TotalnoninterestincomeoutofscopeofASC606


Totalnoninterestincomeoutofscopeof
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
Value7.59.1491114128.1059.891118.7684.7595.6245.8954.4513.8265.2814.4655.158
Percentage of TotalnoninterestincomeoutofscopeofASC606100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:Totalunusualorinfrequentexpenseitems

indb:Totalunusualorinfrequentexpenseitems


Totalunusualorinfrequentexpenseitems
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.6840.00.705241.6828.0462.6880.4340.00.00.02.9090.4844.7640.1510.2060.7710.00.01.504100.6070.6981.1220.586.2190.3660.7541.67
Percentage of Totalunusualorinfrequentexpenseitems100.00.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:UsGaap_FinancingReceivableTroubledDebtRestructuringIncreaseDecreaseFromModification

indb:UsGaap_FinancingReceivableTroubledDebtRestructuringIncreaseDecreaseFromModification


Us
Period End2021-06-302021-03-312020-06-302020-03-31
Value14140.51872
Percentage of UsGaap_FinancingReceivableTroubledDebtRestructuringIncreaseDecreaseFromModification100.0100.0100.0100.0

us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities

us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value122519-10.688-27.861-37.15431100-79.656-1.0578.1093.1352.6436.3282015-8.78716365.242-7.869-17.0688.0135.60812-2.0359.493121.1091.33152932132.206-12.20912-3.0198.671-15.331-11.70928-6.60614
Percentage of AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdvertisingExpense

us-gaap:AdvertisingExpense


Advertising
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1151000.01215000.0787000.01105000.01532000.01417000.01282000.01213000.01258000.01395000.01166000.01123000.0971000.01359000.01365000.01294000.01068000.01654000.01223000.01257000.0544000.01414000.01853000.0834000.0607000.01179000.01249000.0824000.0870000.0759000.01479000.01172000.0471000.01267000.01473000.0738000.0629000.0703000.01606000.0938000.0472000.0469000.0789000.0
Percentage of AdvertisingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount

us-gaap:AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount


Affordable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.27514-1.267-0.362-0.161116.76.7275.611-0.051-0.0470.0115.494-0.051-0.011-0.0295.7450.055-0.046-0.0625.419-0.519-0.163
Percentage of AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.22812-1.124-0.4-0.1359.2115.0715.0794.4050.043-0.0540.0584.330.414-0.006-0.0144.0080.056-0.003-0.0793.751-0.39-0.072
Percentage of AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BankOwnedLifeInsuranceIncome

us-gaap:BankOwnedLifeInsuranceIncome


Bank
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1589000.01323000.01460000.01314000.01312000.01276000.01441000.01304000.01296000.0972000.01131000.0984000.0998000.0947000.01127000.01019000.01017000.0964000.01109000.0984000.0982000.01014000.01007000.0958000.0949000.0778000.0911000.0774000.0721000.0722000.0904000.0793000.0786000.0746000.0903000.0757000.0741000.0713000.0847000.0757000.0860000.0706000.0839000.0901000.0731000.0
Percentage of BankOwnedLifeInsuranceIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationAcquisitionRelatedCosts

us-gaap:BusinessCombinationAcquisitionRelatedCosts


Business
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value1.7310.00.00.00.705241.0328.0462.6880.4340.00.00.02.9090.4844.7640.1510.2060.3340.00.00.271100.5860.6770.00.0776.2190.3660.7541.3455.4740.5950.672
Percentage of BusinessCombinationAcquisitionRelatedCosts100.00.00.00.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths us-gaap:IncomeStatementLocation

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths

us-gaap:InterestExpense


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-0.1310.844-1.9962.199-0.613-0.5870.2010.3430.725-0.040.090.1660.656
Percentage of CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncome


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.1-19.437-36.91.6165.84.31.30.637-0.060.0240.053
Percentage of CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths-76.3-2298.6-1858.7-1678.0-261.0-2862.02885.61253.6179.3-1592.5-66.714.58.1

us-gaap:CommonStockDividendsPerShareDeclared us-gaap:StatementEquityComponents

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:RetainedEarnings


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.480.480.460.460.460.460.440.440.440.440.380.380.380.380.320.320.320.320.290.290.290.290.260.260.260.260.240.240.240.240.220.220.220.220.210.210.210.210.190.190.190.190.180.18
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CurrentFederalStateAndLocalTaxExpenseBenefit

us-gaap:CurrentFederalStateAndLocalTaxExpenseBenefit


Current
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value121110117.7792.148171011
Percentage of CurrentFederalStateAndLocalTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtAndEquitySecuritiesUnrealizedGainLoss

us-gaap:DebtAndEquitySecuritiesUnrealizedGainLoss


Debt
Period End2021-06-302020-06-302020-03-312019-03-31
Value436000.01386000.0-1799000.00
Percentage of DebtAndEquitySecuritiesUnrealizedGainLoss100.0100.0100.00.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value8.1268.2286.1916.9597.126.9925.528.8971.3743.6483.9064.0673.844.1814.1844.0433.8973.5573.6253.4874.3372.9052.9582.9393.2433.1452.562.7073.0732.6712.2222.1272.0772.0642.3122.5542.7572.5892.4562.2822.5182.3782.7714.193
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:DerivativeGainLossOnDerivativeNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value0.1160.1731.142.4572.8643.5972.1662.7390.9320.6410.8260.3920.7080.4471.1090.7841.3370.6061.5280.812.0951.7221.0140.9681.430.4181.0250.3810.3240.7460.761.3310.8160.5320.711.047
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet us-gaap:HedgingDesignation

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-30
Value4698000.04380000.04339000.03976000.01586000.01176000.0352000.0394000.0424000.0-435000.0268000.0167000.090000.0-177000.0-91000.0-80000.0-93000.0648000.0-648000.0-640000.0-661000.0-698000.0-715000.0709000.0-706000.0725000.0726000.01063000.0-1148000.010045000.0-1464000.0-1443000.0-1414000.09425000.0-1370000.0-1346000.0-1293000.0-1467000.0
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet us-gaap:HedgingDesignation

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-1237000.0-2601000.0-751000.02020000.03350000.0-723000.0-641000.0374000.01492000.071000.043000.0-146000.0151000.08000.0-115000.0-33000.057000.037000.0-488000.061000.0213000.0170000.0-115000.0213000.0-336000.0195000.014000.051000.055000.0-12000.03000.0-26000.01166000.0127000.023000.08000.0
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:Nondesignated, us-gaap:OtherExpense


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-11000.0-283000.0-147000.0-28000.00-24000.0-5000.0-2000.0-10000.0-1000.0-1000.0-10000.0-5000.0-13000.0-4000.0-7000.0-4000.0-6000.0-36000.0-12000.0-18000.0-16000.0-2000.00-33000.0-18000.0-1000.0-1000.0-1000.0-1000.0-8000.0-27000.0-56000.0-25000.0-26000.0-4000.0
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet0.910.919.6-1.40.03.30.8-0.5-0.7-1.4-2.36.8-3.3-162.53.521.2-7.0-16.27.4-19.7-8.5-9.41.70.09.8-9.2-7.1-2.0-1.88.3-266.7103.8-4.8-19.7-113.0-50.0

us-gaap:Nondesignated, us-gaap:OtherIncome


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value77000.06000.044000.021000.03000.022000.02000.010000.014000.013000.019000.03000.015000.09000.0-1000.07000.07000.0-7000.02000.0-42000.041000.072000.04000.039000.0-4000.021000.09000.010000.015000.029000.011000.01000.014000.012000.049000.012000.0
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet-6.2-0.2-5.91.00.1-3.0-0.32.70.918.344.2-2.19.9112.50.9-21.212.3-18.9-0.4-68.919.242.4-3.518.31.210.864.319.627.3-241.7366.7-3.81.29.4213.0150.0

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value15151515151515151512101010108.7858.7818.7788.6537.8347.6327.6297.6276.8236.8156.7976.85.765.7385.7385.7255.2375.0585.0385.0324.77922-13.6184.5384.0864.0784.0754.0653.8183.815
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value15151515151515151512101010108.7858.7818.7788.6537.8347.6327.6297.6276.8236.8156.7976.85.765.7385.7385.7255.2375.0585.0385.0324.77922-13.6184.5384.0864.0784.0754.0653.8183.815
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value548000.0316000.0635000.0308000.01386000.0-1801000.04000.0211000.0444000.0907000.0-1118000.0324000.054000.0-485000.0
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 End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value112000.029000.08000.0006000.012000.003000.03000.0866000.04000.02000.02000.0
Percentage of EquitySecuritiesFvNiRealizedGainLoss100.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0

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
Value436000.0287000.0627000.0308000.01386000.0-1807000.0-8000.0211000.0441000.0904000.0-1984000.0320000.052000.0-487000.0
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss

us-gaap:FairValueInputsLevel3, indb:PooledTrustPreferredSecurities


Fair
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-30
Value41000.0-19000.0-60000.012000.0-14000.0-27000.03000.011000.055000.0104000.021000.019000.051000.0-4000.011000.017000.041000.013000.0-71000.012000.012000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements

us-gaap:FairValueInputsLevel3, indb:PooledTrustPreferredSecurities


Fair
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
Value-3000.0-6000.0-4000.0-45000.0-4000.0-161000.0-6000.0-18000.0-482000.0-6000.0-8000.0-6000.0-3000.0-20000.01000.01000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FederalDepositInsuranceCorporationPremiumExpense


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value775000.01050000.0985000.01034000.0503000.0000778000.0616000.0560000.0725000.0691000.0798000.0834000.0673000.0778000.0783000.0725000.0725000.0920000.01010000.0986000.01020000.01017000.0956000.0942000.0957000.0966000.0905000.0926000.0898000.0934000.0821000.0878000.0775000.0830000.0749000.0736000.0691000.0778000.01291000.01303000.01352000.01271000.0
Percentage of FederalDepositInsuranceCorporationPremiumExpense100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease

us-gaap:FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value1200000.00001157000.0
Percentage of FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease100.00.00.00.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

indb:CommercialAndIndustrial


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value00049000.0
Percentage of FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease0.00.00.04.2

us-gaap:CommercialRealEstate


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value000337000.0
Percentage of FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease0.00.00.029.1

us-gaap:ConsumerPortfolioSegment


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value00029000.0
Percentage of FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease0.00.00.02.5

us-gaap:HomeEquity


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value000319000.0
Percentage of FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease0.00.00.027.6

us-gaap:ResidentialRealEstate


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value000423000.0
Percentage of FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease0.00.00.036.6

us-gaap:FinancingReceivableAllowanceForCreditLossesEffectOfChangeInMethod

us-gaap:FinancingReceivableAllowanceForCreditLossesEffectOfChangeInMethod


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value000-1100000.0
Percentage of FinancingReceivableAllowanceForCreditLossesEffectOfChangeInMethod0.00.00.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesEffectOfChangeInMethod us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

indb:CommercialAndIndustrial


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value000-1984000.0
Percentage of FinancingReceivableAllowanceForCreditLossesEffectOfChangeInMethod0.00.00.0180.4

indb:SmallBusiness


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value000495000.0
Percentage of FinancingReceivableAllowanceForCreditLossesEffectOfChangeInMethod0.00.00.0-45.0

us-gaap:CommercialRealEstate


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value000-13048000.0
Percentage of FinancingReceivableAllowanceForCreditLossesEffectOfChangeInMethod0.00.00.01186.2

us-gaap:ConstructionLoans


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value000-3652000.0
Percentage of FinancingReceivableAllowanceForCreditLossesEffectOfChangeInMethod0.00.00.0332.0

us-gaap:ConsumerPortfolioSegment


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value000212000.0
Percentage of FinancingReceivableAllowanceForCreditLossesEffectOfChangeInMethod0.00.00.0-19.3

us-gaap:HomeEquity


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value0007012000.0
Percentage of FinancingReceivableAllowanceForCreditLossesEffectOfChangeInMethod0.00.00.0-637.5

us-gaap:ResidentialRealEstate


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value0009828000.0
Percentage of FinancingReceivableAllowanceForCreditLossesEffectOfChangeInMethod0.00.00.0-893.5

us-gaap:FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease

us-gaap:FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value5200000.05800000.02300000.0-3400000.0-19800000.0
Percentage of FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value289000.0343000.0465000.0253000.0510000.0350000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

indb:CommercialAndIndustrial


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value35000.064000.0242000.01000.04000.042000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery12.118.752.00.40.812.0

indb:SmallBusiness


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value4000.011000.025000.02000.03000.03000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery1.43.25.40.80.60.9

us-gaap:CommercialRealEstate


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value57000.009000.000
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery16.60.03.60.00.0

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value205000.0197000.0162000.0219000.0408000.0246000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery70.957.434.886.680.070.3

us-gaap:HomeEquity


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value45000.013000.036000.021000.095000.058000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery15.63.87.78.318.616.6

us-gaap:ResidentialRealEstate


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value1000.001000.001000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.30.00.40.00.3

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value481000.03686000.02698000.04304000.0710000.0734000.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

indb:CommercialAndIndustrial


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value142000.03331000.02124000.0185000.000
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs29.590.478.74.30.00.0

indb:SmallBusiness


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value35000.066000.0186000.049000.036000.0109000.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs7.31.86.91.15.114.9

us-gaap:CommercialRealEstate


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value03885000.000
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.090.30.00.0

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value235000.0289000.0283000.0185000.0670000.0487000.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs48.97.810.54.394.466.3

us-gaap:HomeEquity


Financing
Period End2021-06-302020-12-312020-09-302020-06-302020-03-31
Value69000.0004000.0138000.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs14.30.00.00.618.8

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value0.089181.3280.8271.7061.1061.4420.4530.1530.225400.9280.3790.6871.9390.8154.1241.2972.7321.3732.1691.4331.0731.1373.4150.0007860.412.5011.0362.9158.2581.1731.7371.6264.7693.343
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

indb:CommercialAndIndustrial


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.0140.3410.0830.040.2680.0840.0870.097390.1260.2120.1961.2990.081.0950.00.2530.2770.1610.11.1970.156-0.0630.1930.399
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.077.725.710.02.324.25.819.263.496.613.610.924.031.56.240.10.011.719.315.08.835.119847.3-15.47.738.5

indb:SmallBusiness


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.0890.10.640.00.0630.025-0.0190.0190.056-0.0780.1830.1210.1430.020.0590.1090.0240.1030.1160.050.0750.00.117
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment2100.00.548.20.03.72.3-1.34.236.6-4.022.52.911.00.74.35.02.29.13.46361.318.30.011.3

us-gaap:CommercialRealEstate


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.03.9640.3470.7441.170.6040.5360.1330.00.150.950.2050.00.4450.8210.00.950.9340.630.9860.9180.424-0.0220.6532.0710.2390.1042.0950.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.021.826.190.068.654.637.229.40.066.72.322.10.064.842.30.023.072.023.171.842.329.6-2.157.460.630407.125.483.80.0

us-gaap:ResidentialRealEstate


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.00.00.4330.2090.8410.1680.3990.5230.1490.4260.00.90.6410.00.7440.4650.4670.2450.00.1570.1490.1580.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.00.025.418.958.337.11.056.439.322.00.021.823.50.034.332.443.521.50.019974.636.36.30.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:LoanRestructuringModification

indb:CombinationRateAndMaturity


Financing
Period End2021-06-302021-03-31
Value0.014
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.077.7

indb:CourtOrderedConcession


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.00.00.0250.00.00.00.075
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.00.00.02.30.00.00.033.3

us-gaap:ContractualInterestRateReduction


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.2180.00.6040.00.00.00.15
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.026.40.054.60.00.00.066.7

us-gaap:ExtendedMaturity


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0894.0641.3280.6091.7060.4770.9590.4530.1530.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment2100.022.3100.073.6100.043.166.5100.0100.00.0

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value0.089181.3280.8271.6551.0981.4050.4480.1530.225360.9080.3790.6871.9080.8154.111.2972.7321.3732.1691.3911.0731.113.4150.0007860.4052.4991.0362.8868.2581.1731.7371.64.7673.337
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

indb:CommercialAndIndustrial


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.0140.3410.0830.040.2680.0840.0870.097350.1260.2120.1961.2990.081.0950.00.2530.2770.1610.11.1970.156-0.0630.1930.399
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.077.725.710.02.424.46.019.463.496.313.911.124.031.66.240.10.011.719.915.09.035.119847.3-15.67.738.5

indb:SmallBusiness


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.0890.10.640.00.0630.049-0.0190.0190.056-0.0780.1830.1210.1430.020.0590.1090.0240.1030.1160.050.0750.00.117
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment2100.00.548.20.03.84.5-1.44.236.6-4.122.52.911.00.74.35.02.29.33.46361.318.50.011.3

us-gaap:CommercialRealEstate


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.03.9640.3470.7441.170.6040.5360.1330.00.150.950.2050.00.4450.8210.00.950.9340.630.9860.9180.424-0.0220.6532.0710.2390.1042.0950.0
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.021.826.190.070.755.038.129.70.066.72.622.60.064.843.00.023.172.023.171.842.330.5-2.158.860.630407.125.783.80.0

us-gaap:ResidentialRealEstate


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.00.00.3820.1770.8040.1630.3960.5030.1490.3950.00.8890.6410.00.7440.4230.4670.2180.00.1570.1470.1560.0
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.00.023.116.157.236.41.155.439.320.70.021.623.50.034.330.443.519.60.019974.636.36.20.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value-56000.0-4000.0-9000.05000.052000.0-420000.0654000.0-141000.0-14000.0-25000.01134000.0-12000.0-3000.07000.015000.01000.096000.0-4000.0-104000.03000.0-8000.0-103000.0-112000.02000.036000.0-115000.0-37000.0-353000.0-533000.01000.00-28000.01000.013000.07000.09000.0-51000.0-297000.000
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:GainLossOnSalesOfLoansNet

us-gaap:GainLossOnSalesOfLoansNet


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4.28.19.410.06.14.53.75.53.30.7051.01.10.7550.7821.31.40.9770.982.21.71.30.894
Percentage of GainLossOnSalesOfLoansNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnTerminationOfLease

us-gaap:GainLossOnTerminationOfLease


Gain
Period End2021-03-31
Value4800000.0
Percentage of GainLossOnTerminationOfLease100.0

us-gaap:IncomeLossFromAffordableHousingProjectsEquityMethodInvestments

us-gaap:IncomeLossFromAffordableHousingProjectsEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value47000.01904000.0-144000.038000.0-26000.01983000.01628000.01648000.01205000.0-94000.07000.0-48000.01165000.0-465000.0-4000.0-15000.01737000.0-1000.0-43000.017000.01668000.0-132000.0-88000.0
Percentage of IncomeLossFromAffordableHousingProjectsEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInEquitySecuritiesFvNi

us-gaap:IncreaseDecreaseInEquitySecuritiesFvNi


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1291000.0124000.0472000.0119000.0104000.0108000.0355000.0123000.0128000.0105000.06010000.0103000.0124000.078000.00
Percentage of IncreaseDecreaseInEquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet

us-gaap:IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet


Increase
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312016-12-312015-12-312015-09-302014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-100.00.0-202.82625745-202.0147-122.046-37.00.00.010.00.0-60.8212212-23.741-5.21913-2.84-18.45-0.20333-1.57216-12.2071.85
Percentage of IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet100.00.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInLoansHeldForSale

us-gaap:IncreaseDecreaseInLoansHeldForSale


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-16.376-14.7083.3478.905-0.11411-22.26-67.89231-0.846-3.8020.7145.607-0.805-0.68-3.8145.83-2.594-7.2220.365.381.544-5.4610.9291.0642.592-5.709-3.3219.163-2.145-1.511-23.439-3.098-11.2576.72319-0.9172.615-1.5839.6193.604-19.9137.4164.729
Percentage of IncreaseDecreaseInLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherDeposits

us-gaap:IncreaseDecreaseInOtherDeposits


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value4446822491681478394-103.923-6.881-73.8672452-40.9342561129-32.1648791168621532102-41.22732047-69.124342061462799183-10.40892481177410030205-24.45783-4.15
Percentage of IncreaseDecreaseInOtherDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-8.492-70.901-54.5679.25939151-17.7743028-1.721-12.682104.185-2.594-15.4614.4129.411-18.384-49.671-3.22114300.50211-13.001-3.05612-4.340.01-1.991-7.844-3.37-26.765-10.924-7.7567.1028.869-3.8352.7042319-13.378-8.5463.841
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1.912-53.201-13.0242.317-5.61492-21.38565-19.338-5.228-8.966116.619-2.175-10.002122.088-8.192-27.052-1.3017.85311-4.48514-7.061-5.292100.8344.568-8.722-1.7520.621-3.023-11.862-1.3324.9099.2-8.3693.796126.308-8.097-11.95316
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInTimeDeposits

us-gaap:IncreaseDecreaseInTimeDeposits


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-50.726-82.569-107.987-33.551-177.342-125.396-73.38526-10.83212-20.6563.7045.036101619-22.568-33.219-49.044-15.004-13.122-27.633-26.433-14.44-20.83-19.023-22.844-30.394-22.428-18.342-17.627-18.355-58.29515-21.331-9.11614-5.25-11.306-29.535-3.773-18.4-73.127-58.565
Percentage of IncreaseDecreaseInTimeDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInTradingSecurities

us-gaap:IncreaseDecreaseInTradingSecurities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value170000.0431000.0226000.071000.0294000.068000.0216000.024000.0102000.0333000.0-77000.0-17000.0-3000.0277000.026000.05000.04000.0485000.0-5000.010000.036000.0407000.0-98000.0-35000.0-5000.0494000.00000000265000.0256000.0-555000.018000.0924000.0179000.0255000.0
Percentage of IncreaseDecreaseInTradingSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationTechnologyAndDataProcessing

us-gaap:InformationTechnologyAndDataProcessing


Information
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1686000.01665000.01581000.01567000.01459000.01658000.01633000.01515000.02042000.01326000.01288000.01287000.01264000.01286000.01256000.01272000.01188000.01272000.01144000.01400000.01225000.01206000.01169000.01112000.01228000.01122000.01156000.01178000.01179000.01253000.01184000.01179000.01201000.01184000.01226000.01144000.01099000.01175000.01063000.01152000.01038000.01638000.01578000.01404000.01497000.0
Percentage of InformationTechnologyAndDataProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndDividendIncomeOperating


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value9699969799107113119122918782797372716864636261595960595654545452525151505148484748484948495051
Percentage of InterestAndDividendIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndFeeIncomeLoansAndLeasesHeldForSale

us-gaap:InterestAndFeeIncomeLoansAndLeasesHeldForSale


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value186000.0296000.0301000.0326000.0359000.0232000.0364000.0456000.040000.031000.049000.061000.030000.019000.024000.033000.021000.014000.065000.081000.057000.032000.052000.064000.058000.051000.099000.0159000.096000.051000.0113000.0156000.0237000.0268000.0447000.0255000.0156000.0130000.0177000.0116000.070000.0119000.0276000.0174000.0110000.0
Percentage of InterestAndFeeIncomeLoansAndLeasesHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio

us-gaap:InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value889289909199104110112837975726766656258575655545454545149494948484747464744434343434343434444
Percentage of InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseBorrowings

us-gaap:InterestExpenseBorrowings


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.3311.3421.381.6041.842.1842.5763.184.9471.991.3961.391.4121.3431.3521.3741.4661.441.8751.9071.8891.9822.0442.2322.3472.4172.2832.072.4432.5832.93.1823.3373.2933.2773.0983.1113.2043.6213.8423.8544.04.5544.594.667
Percentage of InterestExpenseBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDeposits

us-gaap:InterestExpenseDeposits


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2.0172.7113.9825.4327.027101111117.0286.2225.2514.5873.9353.6923.3312.9122.7672.8012.7332.7382.8682.942.9512.9222.7632.7252.7352.7892.7912.7672.6492.5432.6652.6582.6192.6872.7392.9073.4193.5443.4854.0294.8015.485
Percentage of InterestExpenseDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value98989183716995104105817975716766676259545655545454535148474643434242434139344038393839373734
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeFederalFundsSold

us-gaap:InterestIncomeFederalFundsSold


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value513000.0326000.0301000.0254000.0132000.0160000.0454000.0680000.0647000.0426000.0908000.0916000.0541000.0311000.0604000.0417000.0190000.0207000.0423000.0387000.0169000.0211000.0137000.0121000.060000.030000.076000.096000.069000.038000.066000.079000.021000.034000.047000.034000.019000.033000.082000.049000.014000.017000.070000.0135000.0108000.0
Percentage of InterestIncomeFederalFundsSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:InterestIncomeSecuritiesTaxable


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value7.1846.6277.1277.2187.8317.9578.158.2698.5217.4657.1326.6646.4986.2195.8475.6425.6095.3675.3515.034
Percentage of InterestIncomeSecuritiesTaxable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions

us-gaap:InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value8.8728.3047.7367.5717.2966.8297.637.1887.1536.7486.6276.5646.8226.1426.2265.967
Percentage of InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


Labor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value423939383737373938333131303130292828272726272626262524232223222221222220192120201920201918
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LifeInsuranceCorporateOrBankOwnedChangeInValue

us-gaap:LifeInsuranceCorporateOrBankOwnedChangeInValue


Life
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1589000.01323000.01460000.01314000.01312000.01276000.01441000.01304000.01296000.0972000.01131000.0984000.0998000.0947000.01127000.01019000.01017000.0964000.01109000.0984000.0982000.01014000.01007000.0958000.0949000.0778000.0915000.0770000.0721000.0722000.0904000.0794000.0785000.0746000.0-401000.02064000.0738000.0713000.0851000.0757000.0845000.0706000.0839000.0901000.0
Percentage of LifeInsuranceCorporateOrBankOwnedChangeInValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LossOnContractTermination

us-gaap:LossOnContractTermination


Loss
Period End2020-12-312020-09-30
Value0684000.0
Percentage of LossOnContractTermination0.0100.0

us-gaap:LossOnDerivativeInstrumentsPretax

us-gaap:LossOnDerivativeInstrumentsPretax


Loss
Period End2020-12-31
Value0
Percentage of LossOnDerivativeInstrumentsPretax0.0

us-gaap:NoninterestExpense

us-gaap:NoninterestExpense


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value736973666666676793566455525351515248514647464647485444424241474042424540363736353636363434
Percentage of NoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncome

us-gaap:NoninterestIncome


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value242527292826333128212323211921202118212021191919201618171617171816151716141314121312141110
Percentage of NoninterestIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncomeOtherOperatingIncome

us-gaap:NoninterestIncomeOtherOperatingIncome


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value4.3593.1444.8283.8291.9493.6497.834.7474.9833.4444.2583.032.9992.8533.2062.7242.9062.3012.6672.4012.3092.092.7482.1572.0791.8622.6821.8141.6971.9062.2631.7761.961.7362.7171.4482.7062.0462.4180.961.5752.0083.0532.0211.484
Percentage of NoninterestIncomeOtherOperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OccupancyNet

us-gaap:OccupancyNet


Occupancy
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value8.7069.2739.1879.2739.2739.3179.0988.5558.4247.136.8836.316.4977.4086.3916.0856.0596.1585.945.4335.6675.8275.5115.4435.6726.3945.3465.0275.3016.1464.9084.5734.9195.2494.5554.2184.2344.33.974.1074.2634.5753.9433.8394.094
Percentage of OccupancyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OffBalanceSheetCreditLossLiabilityChangeInMethodCreditLossExpenseReversal

us-gaap:OffBalanceSheetCreditLossLiabilityChangeInMethodCreditLossExpenseReversal


Off
Period End2020-12-312020-09-302020-06-302020-03-31
Value000-1000000.0
Percentage of OffBalanceSheetCreditLossLiabilityChangeInMethodCreditLossExpenseReversal0.00.00.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3.0113.0773.0373.0122.9612.9262.8712.8282.8052.1650.00.00.00.0
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value5.109-10.361-1.912-0.8572.33212-2.6442.8587.1256.1786.838-2.988-2.533-7.24-3.5060.3361.2760.895-10.21-1.3153.0146.679-4.2641.966-3.5952.5413.173-1.3893.9243.196-3.253-0.19
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value3.793-7.774-1.476-0.7091.6959.347-2.0042.1755.4454.7295.153-2.262-1.924-5.468-2.1880.1880.7920.531-6.252-0.8161.8544.081-2.6271.211-2.2281.5611.95-0.852.3951.917-1.987-0.148
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1316000.0-2587000.0-436000.0-148000.0637000.02776000.0-640000.0683000.01680000.01449000.01685000.0-726000.0-609000.0-1772000.0-1318000.0148000.0484000.0364000.0-3958000.0-499000.01160000.02598000.0-1637000.0755000.0-1367000.0980000.01223000.0-539000.01529000.01279000.0-1266000.0-42000.0
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0469000.0-3158000.0-1000.0-1000.0-998000.0-1502000.0-8000.0-8000.0-8000.00-576000.0-4000.0-4000.0-4000.0-175000.0-17000.0-17000.0-17000.0179000.029000.011000.026000.0-1454000.0-48000.0-47000.0-47000.0
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax0.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0184000.0-1235000.0-1000.00-391000.0-588000.0-3000.0-3000.0-3000.00-399000.0-2000.0-3000.0-3000.0-124000.0-11000.0-11000.0-11000.0122000.021000.032000.018000.0-1005000.0-32000.0-33000.0-33000.0
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax0.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent

us-gaap:DesignatedAsHedgingInstrument


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
Value-1.593-6.583-3.655-2.7290.19722-4.5743.038.593.2855.131-0.405-0.1120.2150.4350.109-0.190.089-0.6740.674-0.144
Percentage of OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value43000.044000.069000.069000.069000.069000.069000.069000.069000.069000.069000.069000.069000.069000.068000.070000.069000.069000.069000.069000.069000.069000.067000.075000.0128000.024000.0300000.0-66000.0-66000.0-66000.01326000.051000.051000.022000.0-160000.039000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value31000.032000.049000.050000.049000.050000.049000.050000.050000.049000.049000.049000.051000.049000.040000.041000.041000.041000.040000.040000.042000.041000.040000.045000.076000.014000.0177000.0-39000.0-39000.0-39000.0785000.030000.042000.01000.0-95000.023000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value12000.012000.020000.019000.020000.019000.020000.019000.019000.020000.020000.020000.018000.020000.028000.029000.028000.028000.029000.029000.027000.028000.027000.030000.052000.010000.0123000.0-27000.0-27000.0-27000.0541000.021000.09000.021000.0-65000.016000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value3.793-7.774-1.476-0.7091.6959.347-2.0042.1755.4454.7295.153-2.262-1.924-5.468-2.1880.1880.7920.531-6.252-0.816
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value3.184-18.381-10.899-4.3432.9243-11.0317.13191015-3.389-2.528-6.781-3.6090.6511.0881.178-7.829-0.0792.8746.986-2.8172.374-2.6912.809-0.337-0.4775.5553.978-0.5260.629-4.710.199-1.4151.257-0.7991.139-0.848-5.733-1.308
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-2.217-9.159-5.085-3.7980.27431-6.3644.216114.5727.142-0.564-0.1570.2960.7340.182
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-624000.0-2576000.0-1430000.0-1069000.077000.08997000.0-1790000.01186000.03365000.01287000.02011000.0-159000.0-45000.081000.0299000.073000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.784-3.435-0.489-0.1023.05524-3.7293.2838.8733.595.473-0.2130.0080.280.330.055
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2.481-4.779-0.68-0.1434.2533-5.1884.568124.9967.617-0.2960.010.3860.5570.091
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.697-1.344-0.191-0.0411.1959.443-1.4591.2853.4761.4062.144-0.0830.0020.1060.2270.036
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3.3773.1483.1663.1192.8581.140.8450.2530.2830.3050.3420.1920.120.065-0.105-0.054
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.6984.384.4054.3393.9761.5861.1760.3520.3940.4240.4750.2680.1670.09-0.177-0.091
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1321000.01232000.01239000.01220000.01118000.0446000.0331000.099000.0111000.0119000.0133000.076000.047000.025000.0-72000.0-37000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value2.41-13.538-7.937-3.2132.11731-8.0335.246148.05411-2.55-1.919-5.136-2.2470.3750.680.698-4.837-0.0831.7714.264-1.7691.453-1.7231.719-0.128-0.3113.3612.38-0.3740.337
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-292000.0-1139000.03902000.0-312000.0-314000.01075000.02023000.0-56000.0-56000.0-56000.0-1681000.0-163000.0-162000.0-163000.0837000.0-133000.0-131000.0-132000.0175000.0-102000.0-102000.0-102000.0-429000.0-186000.0-231000.0-129000.03802000.066000.066000.066000.0
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-210000.0-819000.02806000.0-225000.0-225000.0772000.01455000.0-41000.0-40000.0-40000.0-1207000.0-117000.0-117000.0-117000.0494000.0-78000.0-78000.0-78000.0102000.0-59000.0-61000.0-60000.0-255000.0-110000.0-123000.0-76000.02249000.039000.039000.039000.0
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0653000.0-4393000.0-2000.0-1000.0-1389000.0-2090000.0-11000.0-11000.0-11000.00-975000.0-6000.0-7000.0-7000.0-299000.0-28000.0-28000.0-28000.0301000.050000.043000.044000.0-2459000.0-80000.0-80000.0-80000.0
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax0.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-82000.0-320000.01096000.0-87000.0-89000.0303000.0568000.0-15000.0-16000.0-16000.0-474000.0-46000.0-45000.0-46000.0343000.0-55000.0-53000.0-54000.073000.0-43000.0-41000.0-42000.0-174000.0-76000.0-108000.0-53000.01553000.027000.027000.027000.0
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-249000.0-442000.0-246000.0-245000.0-246000.0-245000.02000.02000.02000.02000.0-91000.0-94000.0-93000.0-94000.0-70000.0-69000.0-69000.0-70000.0-55000.0-61000.0-61000.0-61000.0-61000.0-61000.0-60000.0-61000.012000.010000.011000.011000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-179000.0-318000.0-177000.0-176000.0-177000.0-176000.02000.01000.02000.01000.0-65000.0-68000.0-66000.0-68000.0-42000.0-41000.0-41000.0-41000.0-33000.0-36000.0-36000.0-36000.0-36000.0-36000.0-36000.0-36000.07000.05000.07000.07000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-70000.0-124000.0-69000.0-69000.0-69000.0-69000.001000.001000.0-26000.0-26000.0-27000.0-26000.0-28000.0-28000.0-28000.0-29000.0-22000.0-25000.0-25000.0-25000.0-25000.0-25000.0-24000.0-25000.05000.05000.04000.04000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0.774-4.843-2.962-1.130.80311-2.9981.8845.0612.7524.17-0.839-0.609-1.645-1.3620.2760.4080.48-2.9920.0041.1032.722-1.0480.921-0.9681.09-0.209-0.1662.1941.598-0.1520.292-1.7820.142-0.4780.5160.2970.481-0.722-2.3580.574
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value5.109-10.361-1.912-0.8572.33212-2.6442.8585.6636.1786.838-2.988-2.533-7.24-3.5160.3471.2770.896-10.209-1.3153.0166.708-4.3541.966-3.912.5413.226-1.3223.9043.287-3.019-0.19-7.502-1.232-2.6691.419-0.186-0.602-0.4122.343
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value3.793-7.774-1.476-0.7091.6959.347-2.0042.1754.3944.7295.153-2.262-1.924-5.468-2.1940.1950.7920.532-6.251-0.8161.8554.098-2.6811.211-2.4141.5611.981-0.812.3831.971-1.848-0.148-4.592-0.777-1.6780.837-0.139-0.161-0.364-0.2281.436-0.664
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value1316000.0-2587000.0-436000.0-148000.0637000.02776000.0-640000.0683000.01269000.01449000.01685000.0-726000.0-609000.0-1772000.0-1322000.0152000.0485000.0364000.0-3958000.0-499000.01161000.02610000.0-1673000.0755000.0-1496000.0980000.01245000.0-512000.01521000.01316000.0-1171000.0-42000.0-2910000.0-455000.0-991000.0582000.047000.0-238000.0-184000.0-907000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoninterestExpense

us-gaap:OtherNoninterestExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1312109.9912118.089111110138.2259.42110127.6688.8449.525109.0089.3267.8389.1859.744108.773128.077.5547.219417.4918.5817.215397.4497.0966.51365.7597.1065.8157.2075.4596.403
Percentage of OtherNoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromFederalHomeLoanBankStock

us-gaap:PaymentsForProceedsFromFederalHomeLoanBankStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-4840000.00-8184000.08850000.0-552000.0-11109000.0781000.0-8016000.0866000.0080000.01430000.00-2824000.02438000.00-2102000.00-23054000.00-4117000.0000-3093000.0000-2290000.0
Percentage of PaymentsForProceedsFromFederalHomeLoanBankStock100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.00.0100.00.0100.00.0100.00.00.00.0100.00.00.00.0100.0

us-gaap:PaymentsForProceedsFromLoansAndLeases

us-gaap:PaymentsForProceedsFromLoansAndLeases


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-315.751-153.15-14.14444041-39.484-41.507-17.2037085481176.8566620536429728540486442-41.3324648393392944-29.167167812378751.14910178151-13.197
Percentage of PaymentsForProceedsFromLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-31
Value21422325280.030527.172151036
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireHeldToMaturitySecurities

us-gaap:PaymentsToAcquireHeldToMaturitySecurities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1251491490.010843.0314113077352953390.01534854435493114119.476344210429449.952140.09.9751.3970.01.015443082
Percentage of PaymentsToAcquireHeldToMaturitySecurities100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireLifeInsurancePolicies

us-gaap:PaymentsToAcquireLifeInsurancePolicies


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.009400.0480.0150.0080.0930.0480.0150.0070.0930.0480.0150.0080.0930.0490.0140.0080.0930.0470.0150.0080.0930.0470.0150.0080.0920.045100.0080.0930.0480.1180.0080.0930.0480.282-0.1580.0950.0470.1190.0070.0940.0480.118
Percentage of PaymentsToAcquireLifeInsurancePolicies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromLifeInsurancePolicies

us-gaap:ProceedsFromLifeInsurancePolicies


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-06-302013-03-312012-12-31
Value0576000.0788000.001303000.01326000.003162000.000000001000.0574000.05257000.0478000.0000389000.0
Percentage of ProceedsFromLifeInsurancePolicies0.0100.0100.00.0100.0100.00.0100.00.00.00.00.00.00.00.0100.0100.0100.0100.00.00.00.0100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value2526332418311511131140141611131512122115211117252113111211111119242627282323272223345743
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMaturitiesRepaymentsAndCallsOfTradingSecuritiesHeldforinvestment

us-gaap:ProceedsFromMaturitiesRepaymentsAndCallsOfTradingSecuritiesHeldforinvestment


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value68688471574839343319191919222019191928221919151516121112119.0839.45212
Percentage of ProceedsFromMaturitiesRepaymentsAndCallsOfTradingSecuritiesHeldforinvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312012-09-302012-06-302012-03-31
Value04000.05812000.0260000.014000.09000.03779000.04000.0013000.02093000.033000.011000.052000.04387000.01000.01891000.027000.0319000.012000.00886000.0333000.014000.0155000.0305000.03000.0756000.010000.0037000.019000.011000.0
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment0.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:ProceedsFromStockPlans

us-gaap:ProceedsFromStockPlans


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value541000.0492000.0512000.0528000.0532000.0560000.0539000.03378000.0547000.0487000.0920000.0480000.0893000.0419000.0406000.0423000.0414000.0393000.0405000.0858000.0381000.0679000.0672000.0696000.0689000.0638000.0596000.0316000.0324000.0319000.0313000.0317000.0331000.08000.0738000.0362000.0306000.0285000.0284000.0278000.0259000.03000.0
Percentage of ProceedsFromStockPlans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProfessionalFees

us-gaap:ProfessionalFees


Professional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1492000.02391000.01743000.01305000.01603000.01336000.01962000.01338000.01384000.0764000.0918000.01128000.01089000.01285000.0937000.01262000.01251000.0770000.0864000.0601000.01229000.0867000.0829000.0755000.0818000.0737000.0810000.0559000.01031000.0914000.0666000.0710000.0901000.0691000.0583000.0626000.0945000.0685000.0512000.0518000.0923000.0803000.0
Percentage of ProfessionalFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanAndLeaseLosses

us-gaap:ProvisionForLoanAndLeaseLosses


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-5.0-2.50.07.520254.00.01.01.01.21.0752.00.51.30.01.050.64.00.950.60.5250.50.80.7-0.51.751.9012.254.5023.152.653.11.34.353.6068.51.63.82.03.4822.23.5743.56.931
Percentage of ProvisionForLoanAndLeaseLosses100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:ProvisionForLoanLossesExpensed


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-5.0-2.50.07.52025
Percentage of ProvisionForLoanLossesExpensed100.0100.00.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

indb:CommercialAndIndustrial


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-3.0682.388-5.2512.7414.0095.948
Percentage of ProvisionForLoanLossesExpensed61.4-95.50.036.520.023.8

indb:SmallBusiness


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.022-1.4190.6630.0790.7651.694
Percentage of ProvisionForLoanLossesExpensed-0.456.80.01.13.86.8

us-gaap:CommercialRealEstate


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-0.023-0.7185.6236.3067.4589.274
Percentage of ProvisionForLoanLossesExpensed0.528.70.084.137.337.1

us-gaap:ConstructionLoans


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-0.403-0.1290.1870.7090.7541.346
Percentage of ProvisionForLoanLossesExpensed8.15.20.09.53.85.4

us-gaap:ConsumerPortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0190.0550.109-0.142-0.0440.5
Percentage of ProvisionForLoanLossesExpensed-0.4-2.20.0-1.9-0.22.0

us-gaap:HomeEquity


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-0.605-1.357-1.548-1.3096.8595.083
Percentage of ProvisionForLoanLossesExpensed12.154.30.0-17.534.320.3

us-gaap:ResidentialRealEstate


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-0.942-1.320.217-0.8840.1991.155
Percentage of ProvisionForLoanLossesExpensed18.852.80.0-11.81.04.6

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-012018-12-312018-06-302018-03-31
Value0.9532.3373.1332.2237.3582.7691.8982.926320.00.00.0
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:SaleLeasebackTransactionCurrentPeriodGainRecognized

us-gaap:SaleLeasebackTransactionCurrentPeriodGainRecognized


Sale
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value144000.0145000.0145000.0144000.0144000.0145000.0145000.0144000.0144000.0145000.0145000.0144000.0183000.0258000.0259000.0258000.0259000.0258000.0259000.0258000.0259000.0258000.0259000.0258000.0259000.0258000.0259000.0258000.0259000.0258000.0259000.0258000.0259000.0258000.0259000.0258000.0259000.0258000.0259000.0258000.0259000.0258000.0259000.0258000.0
Percentage of SaleLeasebackTransactionCurrentPeriodGainRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardDate, us-gaap:AwardType, us-gaap:PlanName, us-gaap:Vesting

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

indb:DateOne, us-gaap:RestrictedStock, indb:EmployeeStockPlan, indb:RatablyOverPeriod


Share
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value081.840070.2400083.8700071.7500062.53
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.0

indb:DateThree, us-gaap:RestrictedStock, indb:TwoThousandEighteenNonemployeeDirectorStockPlan, indb:ImmediateVestongrantdate


Share
Period End2020-09-30
Value0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0

indb:DateTwo, us-gaap:RestrictedStock, indb:EmployeeStockPlan, indb:RatablyOverPeriod


Share
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value000079.5500072.600063.1
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.00.00.00.094.80.00.00.0101.20.00.00.0100.9

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:PerformanceShares, indb:EmployeeStockPlan


Share
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value081.840070.240083.870071.750063.1
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.00.00.0100.00.00.0100.00.00.0100.00.00.0100.9

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage us-gaap:AwardType, us-gaap:PlanName

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage

us-gaap:PerformanceShares, indb:EmployeeStockPlan


Sharebased
Period End2021-06-302021-03-31
Value085.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage0.0100.0

us-gaap:StockIssuedDuringPeriodValueOther

us-gaap:StockIssuedDuringPeriodValueOther


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value541000.0492000.0512000.0528000.0532000.0560000.0539000.03378000.0547000.0487000.0920000.0480000.0893000.0419000.0406000.0423000.0414000.0393000.0405000.0858000.0381000.0679000.0672000.0696000.0689000.0638000.0596000.0316000.0324000.0319000.0313000.0
Percentage of StockIssuedDuringPeriodValueOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueOther us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value541000.0492000.0512000.0528000.0532000.0560000.0539000.03377000.0547000.0487000.0920000.0480000.0893000.0419000.0406000.0423000.0414000.0393000.0405000.0858000.0381000.0679000.0672000.0696000.0689000.0638000.0596000.0316000.0324000.0319000.0313000.0
Percentage of StockIssuedDuringPeriodValueOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value-0.023-1.22-0.001-0.003-0.051-1.132-0.028-0.004-0.012-1.419-0.027-0.006-0.02-1.318-0.059-0.002-0.025-1.336-0.0230.0-0.002-0.671-0.0120.0-0.01-0.6350.002-0.001-0.17-0.4720.0-0.001-0.161-0.507-0.1230.0-0.115-0.2290.00.0-0.0050.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.00.00.0100.00.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value-0.023-1.221-0.001-0.003-0.051-1.133-0.028-0.003-0.013-1.42-0.027-0.006-0.021-1.318-0.059-0.003-0.024-1.337-0.0230.0-0.002-0.672-0.0120.0-0.01-0.6360.002-0.001-0.17-0.4730.0-0.001-0.161-0.508-0.1220.0-0.116-0.2290.00.0-0.0050.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures100.0100.1100.0100.0100.0100.1100.075.0108.3100.1100.0100.0105.0100.0100.0150.096.0100.1100.00.0100.0100.1100.00.0100.0100.2100.0100.0100.0100.20.0100.0100.0100.299.20.0100.9100.00.00.0100.00.0

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-30
Value0.00.0010.00.00.00.0010.0-0.0010.0010.0010.00.00.0010.00.00.001-0.0010.0010.00.00.00.0010.00.00.00.0010.00.00.00.0010.00.00.00.0010.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures-0.0-0.1-0.0-0.0-0.0-0.1-0.025.0-8.3-0.1-0.0-0.0-5.0-0.0-0.0-50.04.0-0.1-0.00.0-0.0-0.1-0.00.0-0.0-0.20.0-0.0-0.0-0.20.0-0.0-0.0-0.20.0

us-gaap:StockRepurchasedDuringPeriodValue

us-gaap:StockRepurchasedDuringPeriodValue


Stock
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.02173
Percentage of StockRepurchasedDuringPeriodValue0.00.0100.0100.0

us-gaap:StockRepurchasedDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.02173
Percentage of StockRepurchasedDuringPeriodValue0.00.0100.0100.0

us-gaap:CommonStock


Stock
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.0030.012
Percentage of StockRepurchasedDuringPeriodValue0.00.00.00.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value21270.024758.028098.036827.046245.039390.041878.054466.058576.063499.054525.067381.077615.076307.074497.081283.060022.053072.047885.043409.052772.063493.071819.080215.086812.090685.094560.0100170.097445.0100810.052144.046040.031502.052116.020377.024481.019358.013077.039159.046082.052793.090939.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:EntityCommonStockSharesOutstanding

dei:EntityCommonStockSharesOutstanding


Entity
Period End2021-02-242019-05-062019-03-312019-02-252018-12-312018-10-312018-09-302018-08-012018-06-302018-05-012018-03-312017-11-012017-09-302017-08-012017-06-302017-05-012017-03-312016-11-012016-09-302016-08-012016-06-302016-05-022016-03-312015-11-022015-09-302015-08-032015-06-302015-05-012015-03-312014-11-012014-09-302014-08-012014-06-30
Value333428282827272727272727272727272726262626262626262626262623232323
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:AdditionalCommitmentsToLendToBorrowerForTroubleDebtRestructuring

indb:AdditionalCommitmentsToLendToBorrowerForTroubleDebtRestructuring


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value412000.0466000.0263000.0158000.0139000.0163000.063000.061000.0377000.0865000.0982000.01224000.0767000.0600000.0487000.01084000.0817000.02116000.01378000.01097000.01104000.01254000.0972000.01366000.01522000.02071000.01400000.01877000.01921000.02172000.01847000.0896000.0398000.0693000.0
Percentage of AdditionalCommitmentsToLendToBorrowerForTroubleDebtRestructuring100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:AssetsAndLiabilitiesFairValueDisclosureNonrecurring us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

indb:AssetsAndLiabilitiesFairValueDisclosureNonrecurring

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value303131563739253529282932353234363938384.8547.0515.7686.7578.5438.94813151912191722191819161843
Percentage of AssetsAndLiabilitiesFairValueDisclosureNonrecurring100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:AssetsAndLiabilitiesFairValueDisclosureNonrecurring us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsNonrecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value303131563739253529282932353234363938384.8547.0515.7686.7578.5438.94813151912191722191819161843
Percentage of AssetsAndLiabilitiesFairValueDisclosureNonrecurring100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:AssetsAndLiabilitiesFairValueDisclosureRecurring us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

indb:AssetsAndLiabilitiesFairValueDisclosureRecurring

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value262524232321232222222022212121212120202015151313131211111111111110119.919.9689.7028.24
Percentage of AssetsAndLiabilitiesFairValueDisclosureRecurring100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value858683523536525536483478542455456446452450431413404385349378383367355358366373331351332329341266308340344420420382
Percentage of AssetsAndLiabilitiesFairValueDisclosureRecurring3249.22660.72097.62259.92250.82473.12060.92080.92384.22051.92176.52026.52084.62076.91971.11933.51917.01838.11742.31865.42455.42396.82654.52675.52628.42989.22789.12972.32775.02824.22974.62380.62808.43052.83479.24220.74336.44647.3

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1.0561.0210.9861.0091.1141.1061.2811.3141.3291.81.7511.6551.641.6241.5931.5961.5841.5381.5061.51.5721.5861.5956.2726.3215.3865.0914.9673.8416.8346.6536.6626.5137.1647.49313
Percentage of AssetsAndLiabilitiesFairValueDisclosureRecurring4.24.34.24.74.84.85.65.96.38.28.17.67.57.67.57.67.97.69.69.811.711.811.450.253.145.642.542.533.561.160.759.865.771.977.2159.5

indb:AssetsAndLiabilitiesFairValueDisclosureRecurring us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value884709549561549559507502566478478469476473455436427407371399401384370373381392350368349346356284325357361346342315
Percentage of AssetsAndLiabilitiesFairValueDisclosureRecurring3349.22760.72201.82364.22355.02577.82165.72185.72489.82157.82282.82134.72192.62184.52078.62041.12024.61945.71850.21973.02565.02506.62766.22787.32739.93139.42942.23117.92917.52966.73108.12541.72969.13212.63644.93479.73532.93829.0

indb:AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesAmortizedCost

indb:AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesAmortizedCost


Available
Period End2021-06-302021-03-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value164413981063116111601185106210621004992983945905911902850807816827842807798773718731710724710601529537498498516499
Percentage of AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesAmortizedCost

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesAmortizedCost


Available
Period End2020-12-31
Value1119
Percentage of AvailableForSaleandHeldToMaturityDebtSecuritiesAmortizedCost100.0

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterFiveThroughTenYearsAmortizedCost

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterFiveThroughTenYearsAmortizedCost


Available
Period End2020-12-31
Value118
Percentage of AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterFiveThroughTenYearsAmortizedCost100.0

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterFiveThroughTenYearsFairValue

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterFiveThroughTenYearsFairValue


Available
Period End2020-12-31
Value125
Percentage of AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterFiveThroughTenYearsFairValue100.0

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterOneThroughFiveYearsAmortizedCost

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterOneThroughFiveYearsAmortizedCost


Available
Period End2020-12-31
Value88
Percentage of AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterOneThroughFiveYearsAmortizedCost100.0

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterOneThroughFiveYearsFairValue

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterOneThroughFiveYearsFairValue


Available
Period End2020-12-31
Value91
Percentage of AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterOneThroughFiveYearsFairValue100.0

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterTenYearsAmortizedCost

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterTenYearsAmortizedCost


Available
Period End2020-12-31
Value910
Percentage of AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterTenYearsAmortizedCost100.0

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterTenYearsFairValue

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterTenYearsFairValue


Available
Period End2020-12-31
Value945
Percentage of AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterTenYearsFairValue100.0

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesWithinOneYearAmortizedCost

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesWithinOneYearAmortizedCost


Available
Period End2020-12-31
Value2599000.0
Percentage of AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesWithinOneYearAmortizedCost100.0

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesWithinOneYearFairValue

indb:AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesWithinOneYearFairValue


Available
Period End2020-12-31
Value2624000.0
Percentage of AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesWithinOneYearFairValue100.0

indb:BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesOfCompanyStockIssuedForEachShareOfAcquireeStock us-gaap:SubsequentEventType

indb:BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesOfCompanyStockIssuedForEachShareOfAcquireeStock

us-gaap:SubsequentEvent


Business
Period End2021-04-22
Value0.275
Percentage of BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesOfCompanyStockIssuedForEachShareOfAcquireeStock100.0

indb:BusinessCombinationCostofAcquiredEntityPurchasePrice us-gaap:SubsequentEventType

indb:BusinessCombinationCostofAcquiredEntityPurchasePrice

us-gaap:SubsequentEvent


Business
Period End2021-04-22
Value1150
Percentage of BusinessCombinationCostofAcquiredEntityPurchasePrice100.0

indb:CallableSecuritiesInInvestmentPortfolio

indb:CallableSecuritiesInInvestmentPortfolio


Callable
Period End2021-06-302021-03-312020-12-312020-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value3.33.33.63.98.38.07.87.7101113
Percentage of CallableSecuritiesInInvestmentPortfolio100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:CertificatesofDepositsover250000.00

indb:CertificatesofDepositsover250000.00


Certificatesof
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value20224410480756954
Percentage of CertificatesofDepositsover250000.00100.0100.0100.0100.0100.0100.0100.0

indb:CommonEquityTier1CapitaltobeWellCapitalized dei:LegalEntity

indb:CommonEquityTier1CapitaltobeWellCapitalized

indb:RocklandTrustCompany


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value590592446416393363
Percentage of CommonEquityTier1CapitaltobeWellCapitalized100.0100.0100.0100.0100.0100.0

indb:CommonEquityTierOneCapitalforCapitalizedAdequacytoRiskWeightedAssets dei:LegalEntity

indb:CommonEquityTierOneCapitalforCapitalizedAdequacytoRiskWeightedAssets

indb:RocklandTrustCompany


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value4.50.0450.0450.0450.0450.045
Percentage of CommonEquityTierOneCapitalforCapitalizedAdequacytoRiskWeightedAssets100.0100.0100.0100.0100.0100.0

indb:CommonEquityTierOneCapitalforCapitalizedAdequacytoRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:ConsolidatedEntities


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4.50.0450.0450.0450.045
Percentage of CommonEquityTierOneCapitalforCapitalizedAdequacytoRiskWeightedAssets100.0100.0100.0100.0100.0

indb:CommonEquityTierOneCapitaltobeWellCapitalizedtoRiskWeightedAssets dei:LegalEntity

indb:CommonEquityTierOneCapitaltobeWellCapitalizedtoRiskWeightedAssets

indb:RocklandTrustCompany


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value6.50.0650.0650.0650.0650.065
Percentage of CommonEquityTierOneCapitaltobeWellCapitalizedtoRiskWeightedAssets100.0100.0100.0100.0100.0100.0

indb:CommonEquitytierOneCapitaltoRiskWeightedAssets dei:LegalEntity

indb:CommonEquitytierOneCapitaltoRiskWeightedAssets

indb:RocklandTrustCompany


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value13.290.13230.12710.12220.11980.1182
Percentage of CommonEquitytierOneCapitaltoRiskWeightedAssets100.0100.0100.0100.0100.0100.0

indb:CommonEquitytierOneCapitaltoRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:ConsolidatedEntities


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value12.670.12860.11920.1120.1082
Percentage of CommonEquitytierOneCapitaltoRiskWeightedAssets95.397.293.891.790.3

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterFiveThroughTenYearsAmortizedCost

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterFiveThroughTenYearsAmortizedCost


Debt
Period End2021-06-302021-03-312020-09-30
Value538388106
Percentage of DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterFiveThroughTenYearsAmortizedCost100.0100.0100.0

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterFiveThroughTenYearsFairValue

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterFiveThroughTenYearsFairValue


Debt
Period End2021-06-302021-03-312020-09-30
Value541384113
Percentage of DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterFiveThroughTenYearsFairValue100.0100.0100.0

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterOneThroughFiveYearsAmortizedCost

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterOneThroughFiveYearsAmortizedCost


Debt
Period End2021-06-302021-03-312020-09-30
Value1178486
Percentage of DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterOneThroughFiveYearsAmortizedCost100.0100.0100.0

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterOneThroughFiveYearsFairValue

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterOneThroughFiveYearsFairValue


Debt
Period End2021-06-302021-03-312020-09-30
Value1208789
Percentage of DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterOneThroughFiveYearsFairValue100.0100.0100.0

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterTenYearsAmortizedCost

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterTenYearsAmortizedCost


Debt
Period End2021-06-302021-03-312020-09-30
Value974911860
Percentage of DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterTenYearsAmortizedCost100.0100.0100.0

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterTenYearsFairValue

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterTenYearsFairValue


Debt
Period End2021-06-302021-03-312020-09-30
Value997933900
Percentage of DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDateafterTenYearsFairValue100.0100.0100.0

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDatewithinOneYearAmortizedCost

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDatewithinOneYearAmortizedCost


Debt
Period End2021-06-302021-03-312020-09-30
Value131410
Percentage of DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDatewithinOneYearAmortizedCost100.0100.0100.0

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDatewithinOneYearFairValue

indb:DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDatewithinOneYearFairValue


Debt
Period End2021-06-302021-03-312020-09-30
Value131410
Percentage of DebtSecuritiesAvailableforsaleandHeldtomaturityMaturityAllocatedandSingleMaturityDatewithinOneYearFairValue100.0100.0100.0

indb:DeferredTaxAssetLoanFairValueAdjustment

indb:DeferredTaxAssetLoanFairValueAdjustment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value4791000.06804000.04761000.03070000.04336000.03789000.02094000.01819000.01402000.00
Percentage of DeferredTaxAssetLoanFairValueAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

indb:DeferredTaxAssetOperatingLeaseLiability

indb:DeferredTaxAssetOperatingLeaseLiability


Deferred
Period End2020-12-31
Value15
Percentage of DeferredTaxAssetOperatingLeaseLiability100.0

indb:DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSale

indb:DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSale


Deferred
Period End2020-12-31
Value4152000.0
Percentage of DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSale100.0

indb:DefinedBenefitPlanAlternativeInvestmentsFairValueOfPlanAssets us-gaap:RetirementPlanType

indb:DefinedBenefitPlanAlternativeInvestmentsFairValueOfPlanAssets

us-gaap:OtherPensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value6180000.05927000.0
Percentage of DefinedBenefitPlanAlternativeInvestmentsFairValueOfPlanAssets100.0100.0

indb:DefinedBenefitPlanFairValueofPlanAssetsExcludingNetAssetValueInvestments us-gaap:FairValueByFairValueHierarchyLevel

indb:DefinedBenefitPlanFairValueofPlanAssetsExcludingNetAssetValueInvestments

us-gaap:FairValueInputsLevel1


Defined
Period End2020-12-312019-12-31
Value6045000.05726000.0
Percentage of DefinedBenefitPlanFairValueofPlanAssetsExcludingNetAssetValueInvestments100.0100.0

indb:DefinedBenefitPlanFairValueofPlanAssetsExcludingNetAssetValueInvestments us-gaap:RetirementPlanType

us-gaap:OtherPensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value6045000.05726000.0
Percentage of DefinedBenefitPlanFairValueofPlanAssetsExcludingNetAssetValueInvestments100.0100.0

indb:DerivativeInstrumentNotDesignatedasaHedgeForwardSaleHedgeCommitmentAssetatFairValue us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

indb:DerivativeInstrumentNotDesignatedasaHedgeForwardSaleHedgeCommitmentAssetatFairValue

us-gaap:OtherAssets, us-gaap:InterestRateLockCommitments, us-gaap:Nondesignated


Derivative
Period End2021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1131000.000018000.000
Percentage of DerivativeInstrumentNotDesignatedasaHedgeForwardSaleHedgeCommitmentAssetatFairValue100.00.00.00.0100.00.00.0

indb:DerivativeInstrumentNotDesignatedasaHedgeForwardSaleHedgeCommitmentLiabilityatFairValue us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

indb:DerivativeInstrumentNotDesignatedasaHedgeForwardSaleHedgeCommitmentLiabilityatFairValue

us-gaap:OtherLiabilities, us-gaap:InterestRateLockCommitments, us-gaap:Nondesignated


Derivative
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value213000.01035000.0523000.0765000.01980000.0196000.00570000.00
Percentage of DerivativeInstrumentNotDesignatedasaHedgeForwardSaleHedgeCommitmentLiabilityatFairValue100.0100.0100.0100.0100.0100.00.0100.00.0

indb:DerivativeInstrumentNotDesignatedasaHedgeForwardSalesAgreementsAssetatFairValue us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

indb:DerivativeInstrumentNotDesignatedasaHedgeForwardSalesAgreementsAssetatFairValue

us-gaap:OtherAssets, us-gaap:InterestRateLockCommitments, us-gaap:Nondesignated


Derivative
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value370000.061000.00399000.0003000.0128000.0106000.0080000.019000.09000.00035000.00163000.0330000.078000.00140000.0088000.03000.00
Percentage of DerivativeInstrumentNotDesignatedasaHedgeForwardSalesAgreementsAssetatFairValue100.0100.00.0100.00.00.0100.0100.0100.00.0100.0100.0100.00.00.0100.00.0100.0100.0100.00.0100.00.0100.0100.00.0

indb:DerivativeInstrumentNotDesignatedasaHedgeForwardSalesAgreementsLiabilitiesatFairValue us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

indb:DerivativeInstrumentNotDesignatedasaHedgeForwardSalesAgreementsLiabilitiesatFairValue

us-gaap:OtherLiabilities, us-gaap:InterestRateLockCommitments, us-gaap:Nondesignated


Derivative
Period End2021-06-302020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value8000.01000.0572000.0012000.041000.066000.00061000.00006000.046000.00233000.00001000.00155000.00035000.0
Percentage of DerivativeInstrumentNotDesignatedasaHedgeForwardSalesAgreementsLiabilitiesatFairValue100.0100.0100.00.0100.0100.0100.00.00.0100.00.00.00.0100.0100.00.0100.00.00.00.0100.00.0100.00.00.0100.0

indb:DerivativeInstrumentNotDesignatedasaHedgeInterestRateLockCommitmentsAssetatFairValue us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

indb:DerivativeInstrumentNotDesignatedasaHedgeInterestRateLockCommitmentsAssetatFairValue

us-gaap:OtherAssets, us-gaap:InterestRateLockCommitments, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value2071000.01652000.06513000.06587000.05435000.02332000.01680000.02133000.02377000.0128000.091000.0233000.0231000.0151000.0149000.0274000.0347000.0212000.0430000.0488000.0206000.0268000.0233000.0209000.0330000.0386000.0295000.0204000.0
Percentage of DerivativeInstrumentNotDesignatedasaHedgeInterestRateLockCommitmentsAssetatFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:ExposureToCounterpartiesRelatingToCustomerRelatedPositions

indb:ExposureToCounterpartiesRelatingToCustomerRelatedPositions


Exposure
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value8176127145153143517150136.41.52.43.29.51415131642473923301824181417141317162731312925
Percentage of ExposureToCounterpartiesRelatingToCustomerRelatedPositions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:ExposuretoInstitutionalCounterparties

indb:ExposuretoInstitutionalCounterparties


Exposureto
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
Value40504854585725302617182723177.14.14.05.54.70.010.00.00.0020.00.0650.0040.2721.30.6982.13.4
Percentage of ExposuretoInstitutionalCounterparties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

indb:FederalHomeLoanBankAdvancesWeightedAverageInterestRateinclusiveofSwaps

indb:FederalHomeLoanBankAdvancesWeightedAverageInterestRateinclusiveofSwaps


Federal
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1.130.01880.02550.02470.03420.026
Percentage of FederalHomeLoanBankAdvancesWeightedAverageInterestRateinclusiveofSwaps100.0100.0100.0100.0100.0100.0

indb:FinanceReceivableNonaccrualwithallowance

indb:FinanceReceivableNonaccrualwithallowance


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value262831552220
Percentage of FinanceReceivableNonaccrualwithallowance100.0100.0100.0100.0100.0100.0

indb:FinanceReceivableNonaccrualwithallowance us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

indb:CommercialAndIndustrial


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value3.4653.6063.804171.0451.078
Percentage of FinanceReceivableNonaccrualwithallowance13.012.712.132.24.65.3

indb:SmallBusiness


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.5580.660.8150.5420.6190.45
Percentage of FinanceReceivableNonaccrualwithallowance2.12.32.61.02.72.2

us-gaap:CommercialRealEstate


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value9.0319.63510172.1691.305
Percentage of FinanceReceivableNonaccrualwithallowance33.933.832.531.69.66.4

us-gaap:ConsumerPortfolioSegment


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0950.1360.1560.0790.090.108
Percentage of FinanceReceivableNonaccrualwithallowance0.40.50.50.10.40.5

us-gaap:HomeEquity


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value4.5175.5925.4276.0526.3296.463
Percentage of FinanceReceivableNonaccrualwithallowance17.019.617.310.928.031.7

us-gaap:ResidentialRealEstate


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value8.9528.8710131211
Percentage of FinanceReceivableNonaccrualwithallowance33.631.134.924.254.653.9

indb:FinancialLiabilitiesBookValue us-gaap:FairValueByLiabilityClass

indb:FinancialLiabilitiesBookValue

us-gaap:BankTimeDeposits


Financial
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value817868950105810921269139514701445723711663659654644627608615649629644657684711725746649672702725743691709768753630639630
Percentage of FinancialLiabilitiesBookValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Deposits


Financial
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value11169107251004297929624814677527855786267406716631263536096608460556087585457635305
Percentage of FinancialLiabilitiesBookValue1366.61235.61056.4925.0881.2641.6555.6534.4544.1931.5944.5951.5963.0931.2944.4964.31000.9950.7887.8774.8

indb:FinancingReceivableRecordedInvestmentTroubleDebtRestructuring

indb:FinancingReceivableRecordedInvestmentTroubleDebtRestructuring


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value3941394141414446505153272931313232313233333638424241434546474544485053524446
Percentage of FinancingReceivableRecordedInvestmentTroubleDebtRestructuring100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

indb:FinancingReceivableWithCreditQualityOfLoanBasedUpontheWeightedAverageLoanToValueRatio us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

indb:FinancingReceivableWithCreditQualityOfLoanBasedUpontheWeightedAverageLoanToValueRatio

us-gaap:HomeEquity


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value45.545.946.046.60.470.4690.4660.4710.4790.4960.4930.4890.4920.4870.5010.5590.5550.5490.5590.5620.5590.5590.5580.5090.5050.5350.5360.530.54
Percentage of FinancingReceivableWithCreditQualityOfLoanBasedUpontheWeightedAverageLoanToValueRatio100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value56.656.557.457.70.5740.5810.590.60.6210.5860.5860.5820.5810.5820.5920.610.6090.6340.6320.6270.6190.620.6140.6080.6030.6380.6710.670.67
Percentage of FinancingReceivableWithCreditQualityOfLoanBasedUpontheWeightedAverageLoanToValueRatio124.4123.1124.8123.8122.1123.9126.6127.4129.6118.1118.9119.0118.1119.5118.2109.1109.7115.5113.1111.6110.7110.9110.0119.4119.4119.3125.2126.4124.1

indb:FinancingReceivableWithQualityOfLoanBasedOnWeightedAverageFicoRating us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

indb:FinancingReceivableWithQualityOfLoanBasedOnWeightedAverageFicoRating

us-gaap:HomeEquity


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312013-09-302012-12-31