3.26.1 html 497 416 1 true 118 0 false 8 false false R1.htm 0000001 - Document - Cover Page Sheet http://www.rocklandtrust.com/role/CoverPage Cover Page Cover 1 false false R2.htm 9952151 - Statement - Consolidated Balance Sheets (Unaudited) Sheet http://www.rocklandtrust.com/role/ConsolidatedBalanceSheetsUnaudited Consolidated Balance Sheets (Unaudited) Statements 2 false false R3.htm 9952152 - Statement - Consolidated Balance Sheets (Unaudited) (Parenthetical) Sheet http://www.rocklandtrust.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical Consolidated Balance Sheets (Unaudited) (Parenthetical) Statements 3 false false R4.htm 9952153 - Statement - Consolidated Statements of Income (Unaudited) Sheet http://www.rocklandtrust.com/role/ConsolidatedStatementsofIncomeUnaudited Consolidated Statements of Income (Unaudited) Statements 4 false false R5.htm 9952154 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) Sheet http://www.rocklandtrust.com/role/ConsolidatedStatementsofComprehensiveIncomeUnaudited Consolidated Statements of Comprehensive Income (Unaudited) Statements 5 false false R6.htm 9952155 - Statement - Consolidated Statements of Stockholders' Equity (Unaudited) Sheet http://www.rocklandtrust.com/role/ConsolidatedStatementsofStockholdersEquityUnaudited Consolidated Statements of Stockholders' Equity (Unaudited) Statements 6 false false R7.htm 9952156 - Statement - Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) Sheet http://www.rocklandtrust.com/role/ConsolidatedStatementsofStockholdersEquityUnauditedParenthetical Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) Statements 7 false false R8.htm 9952157 - Statement - Consolidated Statements of Cash Flows (Unaudited) Sheet http://www.rocklandtrust.com/role/ConsolidatedStatementsofCashFlowsUnaudited Consolidated Statements of Cash Flows (Unaudited) Statements 8 false false R9.htm 9952158 - Disclosure - Basis of Presentation Sheet http://www.rocklandtrust.com/role/BasisofPresentation Basis of Presentation Notes 9 false false R10.htm 9952159 - Disclosure - Recent Accounting Standards Sheet http://www.rocklandtrust.com/role/RecentAccountingStandards Recent Accounting Standards Notes 10 false false R11.htm 9952160 - Disclosure - Securities Sheet http://www.rocklandtrust.com/role/Securities Securities Notes 11 false false R12.htm 9952161 - Disclosure - Loans, Allowance for Credit Losses and Credit Quality Sheet http://www.rocklandtrust.com/role/LoansAllowanceforCreditLossesandCreditQuality Loans, Allowance for Credit Losses and Credit Quality Notes 12 false false R13.htm 9952162 - Disclosure - Stock Based Compensation Sheet http://www.rocklandtrust.com/role/StockBasedCompensation Stock Based Compensation Notes 13 false false R14.htm 9952163 - Disclosure - Derivatives and Hedging Activities Sheet http://www.rocklandtrust.com/role/DerivativesandHedgingActivities Derivatives and Hedging Activities Notes 14 false false R15.htm 9952164 - Disclosure - Fair Value Measurements Sheet http://www.rocklandtrust.com/role/FairValueMeasurements Fair Value Measurements Notes 15 false false R16.htm 9952165 - Disclosure - Revenue Recognition (Notes) Notes http://www.rocklandtrust.com/role/RevenueRecognitionNotes Revenue Recognition (Notes) Notes 16 false false R17.htm 9952166 - Disclosure - Comprehensive Income/Loss Sheet http://www.rocklandtrust.com/role/ComprehensiveIncomeLoss Comprehensive Income/Loss Notes 17 false false R18.htm 9952167 - Disclosure - Commitments and contingencies Sheet http://www.rocklandtrust.com/role/Commitmentsandcontingencies Commitments and contingencies Notes 18 false false R19.htm 9952168 - Disclosure - Segment Reporting Sheet http://www.rocklandtrust.com/role/SegmentReporting Segment Reporting Notes 19 false false R20.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 20 false false R21.htm 9955511 - Disclosure - Basis of Presentation Basis of Presentation (Policies) Sheet http://www.rocklandtrust.com/role/BasisofPresentationBasisofPresentationPolicies Basis of Presentation Basis of Presentation (Policies) Policies http://www.rocklandtrust.com/role/RecentAccountingStandards 21 false false R22.htm 9955512 - Disclosure - Securities (Tables) Sheet http://www.rocklandtrust.com/role/SecuritiesTables Securities (Tables) Tables http://www.rocklandtrust.com/role/Securities 22 false false R23.htm 9955513 - Disclosure - Loans, Allowance for Credit Losses and Credit Quality (Tables) Sheet http://www.rocklandtrust.com/role/LoansAllowanceforCreditLossesandCreditQualityTables Loans, Allowance for Credit Losses and Credit Quality (Tables) Tables http://www.rocklandtrust.com/role/LoansAllowanceforCreditLossesandCreditQuality 23 false false R24.htm 9955514 - Disclosure - Stock Based Compensation (Tables) Sheet http://www.rocklandtrust.com/role/StockBasedCompensationTables Stock Based Compensation (Tables) Tables http://www.rocklandtrust.com/role/StockBasedCompensation 24 false false R25.htm 9955515 - Disclosure - Derivatives and Hedging Activities (Tables) Sheet http://www.rocklandtrust.com/role/DerivativesandHedgingActivitiesTables Derivatives and Hedging Activities (Tables) Tables http://www.rocklandtrust.com/role/DerivativesandHedgingActivities 25 false false R26.htm 9955516 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.rocklandtrust.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.rocklandtrust.com/role/FairValueMeasurements 26 false false R27.htm 9955517 - Disclosure - Revenue Recognition Revenue (Tables) Sheet http://www.rocklandtrust.com/role/RevenueRecognitionRevenueTables Revenue Recognition Revenue (Tables) Tables 27 false false R28.htm 9955518 - Disclosure - Comprehensive Income/Loss (Tables) Sheet http://www.rocklandtrust.com/role/ComprehensiveIncomeLossTables Comprehensive Income/Loss (Tables) Tables http://www.rocklandtrust.com/role/ComprehensiveIncomeLoss 28 false false R29.htm 9955519 - Disclosure - Commitments and Contingencies (Tables) Sheet http://www.rocklandtrust.com/role/CommitmentsandContingenciesTables Commitments and Contingencies (Tables) Tables 29 false false R30.htm 9955521 - Disclosure - Securities Securities (Equity gains and losses) (Details) Sheet http://www.rocklandtrust.com/role/SecuritiesSecuritiesEquitygainsandlossesDetails Securities Securities (Equity gains and losses) (Details) Details 30 false false R31.htm 9955522 - Disclosure - Securities (Reconciliation of fair value of available for sale securities) (Details) Sheet http://www.rocklandtrust.com/role/SecuritiesReconciliationoffairvalueofavailableforsalesecuritiesDetails Securities (Reconciliation of fair value of available for sale securities) (Details) Details http://www.rocklandtrust.com/role/SecuritiesTables 31 false false R32.htm 9955523 - Disclosure - Securities Securities (Available for sale securities in continuous unrealized loss position) (Details) Sheet http://www.rocklandtrust.com/role/SecuritiesSecuritiesAvailableforsalesecuritiesincontinuousunrealizedlosspositionDetails Securities Securities (Available for sale securities in continuous unrealized loss position) (Details) Details 32 false false R33.htm 9955524 - Disclosure - Securities Securities (Reconciliation of amortized cost of held to maturity securities) (Details) Sheet http://www.rocklandtrust.com/role/SecuritiesSecuritiesReconciliationofamortizedcostofheldtomaturitysecuritiesDetails Securities Securities (Reconciliation of amortized cost of held to maturity securities) (Details) Details 33 false false R34.htm 9955525 - Disclosure - Securities (Schedule of Contractual Maturities of Securities) (Details) Sheet http://www.rocklandtrust.com/role/SecuritiesScheduleofContractualMaturitiesofSecuritiesDetails Securities (Schedule of Contractual Maturities of Securities) (Details) Details http://www.rocklandtrust.com/role/SecuritiesTables 34 false false R35.htm 9955526 - Disclosure - Securities (Details Textual) (Details) Sheet http://www.rocklandtrust.com/role/SecuritiesDetailsTextualDetails Securities (Details Textual) (Details) Details http://www.rocklandtrust.com/role/SecuritiesTables 35 false false R36.htm 9955527 - Disclosure - Loans, Allowance for Credit Losses and Credit Quality - Financing Receivable, Allowance for Credit Loss (Details) Sheet http://www.rocklandtrust.com/role/LoansAllowanceforCreditLossesandCreditQualityFinancingReceivableAllowanceforCreditLossDetails Loans, Allowance for Credit Losses and Credit Quality - Financing Receivable, Allowance for Credit Loss (Details) Details 36 false false R37.htm 9955528 - Disclosure - Loans, Allowance for Credit Losses and Credit Quality - Finance Receivable Credit Quality Indicators (Details) Sheet http://www.rocklandtrust.com/role/LoansAllowanceforCreditLossesandCreditQualityFinanceReceivableCreditQualityIndicatorsDetails Loans, Allowance for Credit Losses and Credit Quality - Finance Receivable Credit Quality Indicators (Details) Details 37 false false R38.htm 9955529 - Disclosure - Loans, Allowance for Credit Losses and Credit Quality - FICO and LTV (Details) Sheet http://www.rocklandtrust.com/role/LoansAllowanceforCreditLossesandCreditQualityFICOandLTVDetails Loans, Allowance for Credit Losses and Credit Quality - FICO and LTV (Details) Details 38 false false R39.htm 9955530 - Disclosure - Loans, Allowance for Credit Losses and Credit Quality - Finance Receivable, Nonaccrual (Details) Sheet http://www.rocklandtrust.com/role/LoansAllowanceforCreditLossesandCreditQualityFinanceReceivableNonaccrualDetails Loans, Allowance for Credit Losses and Credit Quality - Finance Receivable, Nonaccrual (Details) Details 39 false false R40.htm 9955531 - Disclosure - Loans, Allowance for Credit Losses and Credit Quality - Foreclosed Residential Real Estate Property (Details) Sheet http://www.rocklandtrust.com/role/LoansAllowanceforCreditLossesandCreditQualityForeclosedResidentialRealEstatePropertyDetails Loans, Allowance for Credit Losses and Credit Quality - Foreclosed Residential Real Estate Property (Details) Details 40 false false R41.htm 9955532 - Disclosure - Loans, Allowance for Credit Losses and Credit Quality - Financing Receivable Past Due (Details) Sheet http://www.rocklandtrust.com/role/LoansAllowanceforCreditLossesandCreditQualityFinancingReceivablePastDueDetails Loans, Allowance for Credit Losses and Credit Quality - Financing Receivable Past Due (Details) Details 41 false false R42.htm 9955533 - Disclosure - Loans, Allowance for Credit Losses and Credit Quality - Textual (Details) Sheet http://www.rocklandtrust.com/role/LoansAllowanceforCreditLossesandCreditQualityTextualDetails Loans, Allowance for Credit Losses and Credit Quality - Textual (Details) Details http://www.rocklandtrust.com/role/LoansAllowanceforCreditLossesandCreditQualityTables 42 false false R43.htm 9955534 - Disclosure - Loans, Allowance for Credit Losses and Credit Quality - Amortized Cost of Loan Modifications (Details) Sheet http://www.rocklandtrust.com/role/LoansAllowanceforCreditLossesandCreditQualityAmortizedCostofLoanModificationsDetails Loans, Allowance for Credit Losses and Credit Quality - Amortized Cost of Loan Modifications (Details) Details 43 false false R44.htm 9955535 - Disclosure - Financing Receivable, Modified Subsequent Default (Details) Sheet http://www.rocklandtrust.com/role/FinancingReceivableModifiedSubsequentDefaultDetails Financing Receivable, Modified Subsequent Default (Details) Details 44 false false R45.htm 9955536 - Disclosure - Stock Based Compensation (Awards of Restricted Stock) (Details) Sheet http://www.rocklandtrust.com/role/StockBasedCompensationAwardsofRestrictedStockDetails Stock Based Compensation (Awards of Restricted Stock) (Details) Details http://www.rocklandtrust.com/role/StockBasedCompensationTables 45 false false R46.htm 9955537 - Disclosure - Stock Based Compensation Performance-based Restricted Stock Textual (Details) Sheet http://www.rocklandtrust.com/role/StockBasedCompensationPerformancebasedRestrictedStockTextualDetails Stock Based Compensation Performance-based Restricted Stock Textual (Details) Details 46 false false R47.htm 9955539 - Disclosure - Derivatives and Hedging Activities (Derivative Positions for Interest Rate Swaps which Qualify as Hedges) (Details) Sheet http://www.rocklandtrust.com/role/DerivativesandHedgingActivitiesDerivativePositionsforInterestRateSwapswhichQualifyasHedgesDetails Derivatives and Hedging Activities (Derivative Positions for Interest Rate Swaps which Qualify as Hedges) (Details) Details http://www.rocklandtrust.com/role/DerivativesandHedgingActivitiesTables 47 false false R48.htm 9955540 - Disclosure - Derivatives and Hedging Activities (Customer Related Derivative Positions - Not Designated as Hedges) (Details) Sheet http://www.rocklandtrust.com/role/DerivativesandHedgingActivitiesCustomerRelatedDerivativePositionsNotDesignatedasHedgesDetails Derivatives and Hedging Activities (Customer Related Derivative Positions - Not Designated as Hedges) (Details) Details http://www.rocklandtrust.com/role/DerivativesandHedgingActivitiesTables 48 false false R49.htm 9955541 - Disclosure - Derivatives and Hedging Activities (FV of Derivative Financial Instruments and Classification on Balance Sheet) (Details) Sheet http://www.rocklandtrust.com/role/DerivativesandHedgingActivitiesFVofDerivativeFinancialInstrumentsandClassificationonBalanceSheetDetails Derivatives and Hedging Activities (FV of Derivative Financial Instruments and Classification on Balance Sheet) (Details) Details http://www.rocklandtrust.com/role/DerivativesandHedgingActivitiesTables 49 false false R50.htm 9955542 - Disclosure - Derivatives and Hedging Activities (Derivative Financial Instruments included in OCI and Current Earnings) (Details) Sheet http://www.rocklandtrust.com/role/DerivativesandHedgingActivitiesDerivativeFinancialInstrumentsincludedinOCIandCurrentEarningsDetails Derivatives and Hedging Activities (Derivative Financial Instruments included in OCI and Current Earnings) (Details) Details http://www.rocklandtrust.com/role/DerivativesandHedgingActivitiesTables 50 false false R51.htm 9955543 - Disclosure - Derivatives and Hedging Activities (Textual) (Details) Sheet http://www.rocklandtrust.com/role/DerivativesandHedgingActivitiesTextualDetails Derivatives and Hedging Activities (Textual) (Details) Details http://www.rocklandtrust.com/role/DerivativesandHedgingActivitiesTables 51 false false R52.htm 9955544 - Disclosure - Fair Value Measurements (Details 1) Sheet http://www.rocklandtrust.com/role/FairValueMeasurementsDetails1 Fair Value Measurements (Details 1) Details http://www.rocklandtrust.com/role/FairValueMeasurementsTables 52 false false R53.htm 9955545 - Disclosure - Fair Value Measurements (Details 2) Sheet http://www.rocklandtrust.com/role/FairValueMeasurementsDetails2 Fair Value Measurements (Details 2) Details http://www.rocklandtrust.com/role/FairValueMeasurementsTables 53 false false R54.htm 9955546 - Disclosure - Revenue Recognition Disaggregation of Revenue (Details) Sheet http://www.rocklandtrust.com/role/RevenueRecognitionDisaggregationofRevenueDetails Revenue Recognition Disaggregation of Revenue (Details) Details 54 false false R55.htm 9955547 - Disclosure - Revenue Recognition Contract with Customer, Asset (Details) Sheet http://www.rocklandtrust.com/role/RevenueRecognitionContractwithCustomerAssetDetails Revenue Recognition Contract with Customer, Asset (Details) Details 55 false false R56.htm 9955548 - Disclosure - Comprehensive Income/Loss (Comprehensive Income/(Loss) Presented Net of Taxes) (Details) Sheet http://www.rocklandtrust.com/role/ComprehensiveIncomeLossComprehensiveIncomeLossPresentedNetofTaxesDetails Comprehensive Income/Loss (Comprehensive Income/(Loss) Presented Net of Taxes) (Details) Details http://www.rocklandtrust.com/role/ComprehensiveIncomeLossTables 56 false false R57.htm 9955549 - Disclosure - Comprehensive Income/Loss (Comprised of the following Components) (Details) Sheet http://www.rocklandtrust.com/role/ComprehensiveIncomeLossComprisedofthefollowingComponentsDetails Comprehensive Income/Loss (Comprised of the following Components) (Details) Details http://www.rocklandtrust.com/role/ComprehensiveIncomeLossTables 57 false false R58.htm 9955551 - Disclosure - Commitments and contingencies Financial Instruments with Off-Balance Sheet Risk (Details) Sheet http://www.rocklandtrust.com/role/CommitmentsandcontingenciesFinancialInstrumentswithOffBalanceSheetRiskDetails Commitments and contingencies Financial Instruments with Off-Balance Sheet Risk (Details) Details 58 false false R59.htm 9955552 - Disclosure - Commitments and contingencies Textual (Details) Sheet http://www.rocklandtrust.com/role/CommitmentsandcontingenciesTextualDetails Commitments and contingencies Textual (Details) Details 59 false false All Reports Book All Reports indb-20260331.htm indb-20260331.xsd indb-20260331_cal.xml indb-20260331_def.xml indb-20260331_lab.xml indb-20260331_pre.xml indb-20260331_g1.jpg indb-20260331_g2.jpg indb-20260331_g3.jpg http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 true true