XML 74 R55.htm IDEA: XBRL DOCUMENT
v3.22.1

Fair Value Measurements (Details 1) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
ASSETS |  |  |
Trading |  | $ 3,956 | $ 3,720
Equity Securities, FV-NI |  | 22,611 | 23,173
Debt Securities, Available-for-sale |  | 1,552,731 | 1,571,148
U.S. government agency securities |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 215,935 | 215,482
Agency mortgage-backed securities |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 397,985 | 363,933
Pooled trust preferred securities issued by banks and insurers |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 999 | 1,000
Small Business Administration Pooled Securities [Member] |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 65,788 | 48,914
US Treasury Securities [Member] |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 822,333 | 861,448
Recurring fair value measurements |  |  |
ASSETS |  |  |
Trading |  | 3,956 | 3,720
LIABILITIES |  |  |
TOTAL RECURRING FAIR VALUE MEASUREMENTS |  | 1,581,802 | 1,644,617
Recurring fair value measurements | Equity Securities [Member] |  |  |
ASSETS |  |  |
Equity Securities, FV-NI |  | 22,611 | 23,173
Recurring fair value measurements | U.S. government agency securities |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 215,935 | 215,482
Recurring fair value measurements | Agency mortgage-backed securities |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 397,985 | 363,933
Recurring fair value measurements | Agency collateralized mortgage obligations |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 49,002 | 79,677
Recurring fair value measurements | Municipal Bonds [Member] |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 200 | 203
Recurring fair value measurements | Single issuer trust preferred securities issued by banks and insurers |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 489 | 491
Recurring fair value measurements | Pooled trust preferred securities issued by banks and insurers |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 999 | 1,000
Recurring fair value measurements | Small Business Administration Pooled Securities [Member] |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 65,788 | 48,914
Recurring fair value measurements | Loans held for sale |  |  |
ASSETS |  |  |
Loans Held-for-sale, Fair Value Disclosure |  | 6,144 | 24,679
Recurring fair value measurements | Derivative Financial Instruments, Assets [Member] |  |  |
ASSETS |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 62,244 | 97,912
Recurring fair value measurements | Derivative instruments |  |  |
LIABILITIES |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure |  | 65,884 | 76,015
Recurring fair value measurements | US Treasury Securities [Member] |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 822,333 | 861,448
Nonrecurring fair value measurements |  |  |
LIABILITIES |  |  |
TOTAL NONRECURRING FAIR VALUE MEASUREMENTS |  | 25,231 | 1,174
Nonrecurring fair value measurements | Collateral Dependent Loans [Member] |  |  |
ASSETS |  |  |
Assets, Fair Value Disclosure | [1] | 25,231 | 1,174
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements |  |  |
ASSETS |  |  |
Trading |  | 3,956 | 3,720
LIABILITIES |  |  |
TOTAL RECURRING FAIR VALUE MEASUREMENTS |  | 26,567 | 26,893
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements | Equity Securities [Member] |  |  |
ASSETS |  |  |
Equity Securities, FV-NI |  | 22,611 | 23,173
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements | Municipal Bonds [Member] |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  |  | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements | Small Business Administration Pooled Securities [Member] |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Nonrecurring fair value measurements |  |  |
LIABILITIES |  |  |
TOTAL NONRECURRING FAIR VALUE MEASUREMENTS |  | 0 | 0
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements |  |  |
LIABILITIES |  |  |
TOTAL RECURRING FAIR VALUE MEASUREMENTS |  | 1,555,235 | 1,617,724
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Equity Securities [Member] |  |  |
ASSETS |  |  |
Equity Securities, FV-NI |  | 0 | 0
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | U.S. government agency securities |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 215,935 | 215,482
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Agency mortgage-backed securities |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 397,985 | 363,933
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Agency collateralized mortgage obligations |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 49,002 | 79,677
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Municipal Bonds [Member] |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 200 | 203
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Single issuer trust preferred securities issued by banks and insurers |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 489 | 491
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Pooled trust preferred securities issued by banks and insurers |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 999 | 1,000
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Small Business Administration Pooled Securities [Member] |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 65,788 | 48,914
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Loans held for sale |  |  |
ASSETS |  |  |
Loans Held-for-sale, Fair Value Disclosure |  | 6,144 | 24,679
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Derivative Financial Instruments, Assets [Member] |  |  |
ASSETS |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 62,244 | 97,912
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Derivative instruments |  |  |
LIABILITIES |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure |  | 65,884 | 76,015
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | US Treasury Securities [Member] |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 822,333 | 861,448
Significant Other Observable Inputs (Level 2) | Nonrecurring fair value measurements |  |  |
LIABILITIES |  |  |
TOTAL NONRECURRING FAIR VALUE MEASUREMENTS |  | 0 | 0
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements |  |  |
LIABILITIES |  |  |
TOTAL RECURRING FAIR VALUE MEASUREMENTS |  | 0 | 0
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements | Equity Securities [Member] |  |  |
ASSETS |  |  |
Equity Securities, FV-NI |  | 0 | 0
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements | Municipal Bonds [Member] |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  |  | 0
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements | Small Business Administration Pooled Securities [Member] |  |  |
ASSETS |  |  |
Debt Securities, Available-for-sale |  | 0 | 0
Significant Unobservable Inputs (Level 3) | Nonrecurring fair value measurements |  |  |
LIABILITIES |  |  |
TOTAL NONRECURRING FAIR VALUE MEASUREMENTS |  | 25,231 | 1,174
Significant Unobservable Inputs (Level 3) | Nonrecurring fair value measurements | Collateral Dependent Loans [Member] |  |  |
ASSETS |  |  |
Assets, Fair Value Disclosure | [1] | $ 25,231 | $ 1,174
[1] | The carrying value of individually assessed collateral dependent loans is based on the lower of amortized cost or fair value of the underlying collateral less costs to sell. The fair value of the underlying collateral is generally determined through independent appraisals, which generally include various Level 3 inputs which are not identifiable. Appraisals may be adjusted by management for qualitative factors such as economic factors and estimated liquidation expenses. The range of these possible adjustments may vary.

X
- Definition Assets and liabilities, fair value disclosure nonrecurring. + References No definition available. + Details
Name: | indb_AssetsAndLiabilitiesFairValueDisclosureNonrecurring
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Assets and liabilities, fair value disclosure recurring. + References No definition available. + Details
Name: | indb_AssetsAndLiabilitiesFairValueDisclosureRecurring
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740 + Details
Name: | us-gaap_EquitySecuritiesFvNi
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LiabilitiesFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables. + References No definition available. + Details
Name: | us-gaap_LoansHeldForSaleFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 + Details
Name: | us-gaap_TradingSecuritiesDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=indb_PooledTrustPreferredSecuritiesIssuedByBanksAndInsurersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=indb_SmallBusinessAdministrationPooledSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CollateralizedMortgageObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MunicipalBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=indb_SingleIssuerTrustPreferredSecuritiesIssuedByBanksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_DerivativeFinancialInstrumentsAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=indb_CollateralDependentLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |