XML 82 R62.htm IDEA: XBRL DOCUMENT
v3.20.2

Loans and Allowance for Loan Losses Finance Receivables Bifurcated by type of impairment evaluation (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, Collectively Evaluated for Impairment |  | $ 8,809,155 |
Financing Receivable, Individually Evaluated for Impairment |  | 49,628 |
Financing Receivable, after Allowance for Credit Loss |  | 6,119,185 |
Loans and Leases Receivable, Gross | $ 9,359,648 | 8,873,639 |
Unamortized Loan Commitment and Origination fees |  | 7,100 |
Unamortized Discounts or Premiums |  | 21,600 |
Commercial And Industrial [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, Collectively Evaluated for Impairment |  | 1,370,580 |
Financing Receivable, Individually Evaluated for Impairment |  | 24,456 |
Financing Receivable, after Allowance for Credit Loss |  | 1,395,036 |
Financing Receivable, before Allowance for Credit Loss | 2,004,645 | 1,395,036 |
Loans and Leases Receivable, Gross | 2,004,645 | 1,395,036 |
Commercial Real Estate [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, Collectively Evaluated for Impairment |  | 3,987,848 |
Financing Receivable, Individually Evaluated for Impairment |  | 8,337 |
Financing Receivable, after Allowance for Credit Loss |  | 4,002,359 |
Financing Receivable, before Allowance for Credit Loss | 4,071,047 | 4,002,359 |
Loans and Leases Receivable, Gross | 4,071,047 | 4,002,359 |
Construction Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, Collectively Evaluated for Impairment |  | 547,293 |
Financing Receivable, Individually Evaluated for Impairment |  | 0 |
Financing Receivable, after Allowance for Credit Loss |  | 547,293 |
Financing Receivable, before Allowance for Credit Loss | 537,788 | 547,293 |
Loans and Leases Receivable, Gross | 537,788 | 547,293 |
Small Business [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, Collectively Evaluated for Impairment |  | 173,960 |
Financing Receivable, Individually Evaluated for Impairment |  | 537 |
Financing Receivable, after Allowance for Credit Loss |  | 174,497 |
Financing Receivable, before Allowance for Credit Loss | 170,288 | 174,497 |
Loans and Leases Receivable, Gross | 170,288 | 174,497 |
Residential Real Estate [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, Collectively Evaluated for Impairment |  | 1,571,848 |
Financing Receivable, Individually Evaluated for Impairment |  | 11,228 |
Financing Receivable, before Allowance for Credit Loss | 1,431,129 | 1,590,569 |
Loans and Leases Receivable, Gross | 1,431,129 | 1,590,569 |
Home Equity Line of Credit [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, Collectively Evaluated for Impairment |  | 1,127,963 |
Financing Receivable, Individually Evaluated for Impairment |  | 4,948 |
Loans and Leases Receivable, Gross | 1,120,523 | 1,133,798 |
Consumer - Other [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, Collectively Evaluated for Impairment |  | 29,663 |
Financing Receivable, Individually Evaluated for Impairment |  | 122 |
Financing Receivable, before Allowance for Credit Loss | 24,228 | 30,087 |
Loans and Leases Receivable, Gross | $ 24,228 | 30,087 | [1]
Financial Asset Acquired with Credit Deterioration [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, after Allowance for Credit Loss |  | 14,856 |
Financial Asset Acquired with Credit Deterioration [Member] | Commercial And Industrial [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, after Allowance for Credit Loss |  | 0 |
Financial Asset Acquired with Credit Deterioration [Member] | Commercial Real Estate [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, after Allowance for Credit Loss |  | 6,174 |
Financial Asset Acquired with Credit Deterioration [Member] | Construction Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, after Allowance for Credit Loss |  | 0 |
Financial Asset Acquired with Credit Deterioration [Member] | Small Business [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, after Allowance for Credit Loss |  | 0 |
Financial Asset Acquired with Credit Deterioration [Member] | Residential Real Estate [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, after Allowance for Credit Loss |  | 7,493 |
Financial Asset Acquired with Credit Deterioration [Member] | Home Equity Line of Credit [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, after Allowance for Credit Loss |  | 887 |
Financial Asset Acquired with Credit Deterioration [Member] | Consumer - Other [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing Receivable, after Allowance for Credit Loss |  | $ 302 |
[1] | (1) Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances.

X
- Definition Premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. + References No definition available. + Details
Name: | indb_UnamortizedDiscountsorPremiums
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees + References No definition available. + Details
Name: | indb_UnamortizedLoanCommitmentandOriginationfees
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 + Details
Name: | us-gaap_NotesReceivableNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=indb_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=indb_SmallBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |