XML 93 R65.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Internal Risk Rating Categories for Commercial Portfolio (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | $ 4,539,256 | $ 4,355,968
Commercial and Industrial [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 888,528 | 902,053
Commercial Real Estate [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 3,116,561 | 3,010,798
Construction Loans [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 401,797 | 320,391
Small Business [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 132,370 | 122,726
Pass [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 4,345,232 | 4,097,798
Pass [Member] | Commercial and Industrial [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 806,331 | 783,825
Pass [Member] | Commercial Real Estate [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 3,007,672 | 2,876,570
Pass [Member] | Construction Loans [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 400,964 | 317,099
Pass [Member] | Small Business [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 130,265 | 120,304
Potential weakness [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 87,822 | 134,039
Potential weakness [Member] | Commercial and Industrial [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 16,563 | 46,176
Potential weakness [Member] | Commercial Real Estate [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 69,788 | 84,641
Potential weakness [Member] | Construction Loans [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 0 | 1,363
Potential weakness [Member] | Small Business [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 1,471 | 1,859
Definite weakness [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 99,516 | 121,640
Definite weakness [Member] | Commercial and Industrial [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 59,415 | 71,991
Definite weakness [Member] | Commercial Real Estate [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 38,637 | 47,164
Definite weakness [Member] | Construction Loans [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 833 | 1,929
Definite weakness [Member] | Small Business [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 631 | 556
Parital loss probable [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 6,686 | 2,491
Parital loss probable [Member] | Commercial and Industrial [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 6,219 | 61
Parital loss probable [Member] | Commercial Real Estate [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 464 | 2,423
Parital loss probable [Member] | Construction Loans [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 0 | 0
Parital loss probable [Member] | Small Business [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 3 | 7
Definite loss [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 0 | 0
Definite loss [Member] | Commercial and Industrial [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 0 | 0
Definite loss [Member] | Commercial Real Estate [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 0 | 0
Definite loss [Member] | Construction Loans [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | 0 | 0
Definite loss [Member] | Small Business [Member] |  |
Internal risk-rating categories for the Company's commercial portfolio |  |
Financing Receivable, Net | $ 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 Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 + 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: |