XML 67 R69.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Internal Risk Rating Categories for Commercial Portfolio (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | $ 6,119,185 | $ 4,874,718
Commercial and Industrial [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 1,395,036 | 1,093,629
Commercial Real Estate [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 4,002,359 | 3,251,248
Construction Loans [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 547,293 | 365,165
Small Business [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 174,497 | 164,676
Pass [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 5,848,531 | 4,695,094
Pass [Member] | Commercial and Industrial [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 1,274,155 | 1,014,370
Pass [Member] | Commercial Real Estate [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 3,860,555 | 3,156,989
Pass [Member] | Construction Loans [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 542,608 | 361,884
Pass [Member] | Small Business [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 171,213 | 161,851
Potential weakness [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 164,416 | 74,886
Potential weakness [Member] | Commercial and Industrial [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 63,485 | 16,860
Potential weakness [Member] | Commercial Real Estate [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 97,268 | 56,840
Potential weakness [Member] | Construction Loans [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 2,247 | 298
Potential weakness [Member] | Small Business [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 1,416 | 888
Definite weakness [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 106,238 | 101,248
Definite weakness [Member] | Commercial and Industrial [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 57,396 | 58,909
Definite weakness [Member] | Commercial Real Estate [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 44,536 | 37,419
Definite weakness [Member] | Construction Loans [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 2,438 | 2,983
Definite weakness [Member] | Small Business [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 1,868 | 1,937
Parital loss probable [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 0 | 3,490
Parital loss probable [Member] | Commercial and Industrial [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 0 | 3,490
Parital loss probable [Member] | Commercial Real Estate [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 0 | 0
Parital loss probable [Member] | Construction Loans [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 0 | 0
Parital loss probable [Member] | Small Business [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 0 | 0
Definite loss [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 0 | 0
Definite loss [Member] | Commercial and Industrial [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 0 | 0
Definite loss [Member] | Commercial Real Estate [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 0 | 0
Definite loss [Member] | Construction Loans [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | 0 | 0
Definite loss [Member] | Small Business [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, after Allowance for Credit Loss | $ 0 | $ 0

X
- Definition Summary of internal risk rating categories. + References No definition available. + Details
Name: | indb_SummaryOfInternalRiskRatingCategoriesAbstract
Namespace Prefix: | indb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=indb_PotentialWeaknessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=indb_DefiniteWeaknessLossUnlikelyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=indb_PartialLossProbableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=indb_DefiniteLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |