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TDR's and Other Pertinent Information (Details) $ in Thousands | Dec. 31, 2022 USD ($)
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Summary of Troubled Debt Restructurings and other pertinent information |
Tdrs Recorded Investment On Accrual Status | $ 11,278
Tdrs Recorded Investment On Nonaccrual Status | 11,520
Financing Receivable Recorded Investment Trouble Debt Restructuring | 22,798
Additional Commitments To Lend To Borrower For Trouble Debt Restructuring | $ 64

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- Definition Additional commitments to lend to a borrower for trouble debt restructuring. + References No definition available. + Details
Name: | indb_AdditionalCommitmentsToLendToBorrowerForTroubleDebtRestructuring
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Financing receivable recorded investment trouble debt restructuring. + References No definition available. + Details
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Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Summary of troubled debt restructurings and other pertinent information. + References No definition available. + Details
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- Definition Troubled Debt Restructurings recorded investment that are on accrual status as of the balance sheet date. + References No definition available. + Details
Name: | indb_TdrsRecordedInvestmentOnAccrualStatus
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Troubled Debt Restructurings recorded investment that are on nonaccrual status as of the balance sheet date. + References No definition available. + Details
Name: | indb_TdrsRecordedInvestmentOnNonaccrualStatus
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant