XML 84 R66.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Derivatives and Hedging Activities (Textual) (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |  |  |  |
Debt Instrument, Face Amount | $ 50,000,000 |  | $ 50,000,000 |  |
Exposure to Institutional Counterparties | 0 |  | 0 |  | $ 272,000
Amortization Of Deferred Hedge Gains Losses | 61,000 | $ 61,000 | $ 122,000 | $ 61,000 |
Maximum length of time Company is currently hedging its exposure |  |  | 5 years |  |
Interest expense from OCI, related to cash flow hedges before tax |  |  | $ 1,600,000 |  |
Notional amount of fair value hedged derivative | 0 |  | 0 |  |
Customer related positions | 47,500,000 |  | 47,500,000 |  | 23,200,000
Change in Fair Value on Loans Held for Sale | (41,000) | $ 157,000 | 13,000 | $ 184,000 |
Derivative, Notional Amount | $ 125,000,000 |  | $ 125,000,000 |  | $ 75,000,000

X
- Definition The amount of expense charged against earnings by an entity to record deferred gains and losses on hedge instruments. + References No definition available. + Details
Name: | indb_AmortizationOfDeferredHedgeGainsLosses
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Change in Fair Value on Loans Held for Sale + References No definition available. + Details
Name: | indb_ChangeInFairValueOnLoansHeldForSale
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Exposure to counterparties relating to customer related positions. + References No definition available. + Details
Name: | indb_ExposureToCounterpartiesRelatingToCustomerRelatedPositions
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Exposure to Institutional Counterparties relating to the company's derivative portfolio. + References No definition available. + Details
Name: | indb_ExposuretoInstitutionalCounterparties
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate notional amount specified by a fair value hedged derivative. + References No definition available. + Details
Name: | indb_Notionalamountoffairvaluehedgedderivative
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
Name: | us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Maximum period the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
Name: | us-gaap_MaximumLengthOfTimeHedgedInInterestRateCashFlowHedge1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration