XML 85 R66.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Derivatives and Hedging Activities (Customer Related Derivative Positions - Not Designated as Hedges) (Details) $ in Thousands | Sep. 30, 2017 USD ($) position | Dec. 31, 2016 USD ($) position
--- | --- | ---
Summary of customer related derivative positions, not designated as hedging |  |
Total | $ 100,000 | $ 75,000
Fair Value | $ 822 | $ 624
Not Designated as Hedging Instrument | Receive fixed, pay variable | Loan level swaps |  |
Summary of customer related derivative positions, not designated as hedging |  |
Number of Positions | position | 238 | 222
Less than 1 year | $ 10,533 | $ 30,245
Less than 2 years | 73,428 | 21,708
Less than 3 years | 68,458 | 63,771
Less than 4 years | 177,864 | 165,783
Thereafter | 575,721 | 567,897
Total | 906,004 | 849,404
Fair Value | $ 11,271 | $ 12,005
Not Designated as Hedging Instrument | Pay fixed, receive variable | Loan level swaps |  |
Summary of customer related derivative positions, not designated as hedging |  |
Number of Positions | position | 223 | 207
Less than 1 year | $ 10,533 | $ 30,245
Less than 2 years | 73,428 | 21,708
Less than 3 years | 68,458 | 63,771
Less than 4 years | 177,864 | 165,783
Thereafter | 575,721 | 567,897
Total | 906,004 | 849,404
Fair Value | $ (11,272) | $ (12,008)
Not Designated as Hedging Instrument | Buys foreign currency, sells U.S. currency | Foreign exchange contracts |  |
Summary of customer related derivative positions, not designated as hedging |  |
Number of Positions | position | 17 | 33
Less than 1 year | $ 32,390 | $ 45,711
Less than 2 years | 3,780 |
Total | 36,170 | 45,711
Fair Value | $ 1,683 | $ (2,250)
Not Designated as Hedging Instrument | Buys U.S. currency, sells foreign currency | Foreign exchange contracts |  |
Summary of customer related derivative positions, not designated as hedging |  |
Number of Positions | position | 17 | 33
Less than 1 year | $ 32,390 | $ 45,711
Less than 2 years | 3,780 |
Total | 36,170 | 45,711
Fair Value | $ (1,668) | $ 2,277

X
- Definition Notional amount maturing in next twelve months. + References No definition available. + Details
Name: | indb_NotionalAmountMaturingInNextTwelveMonths
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Notional amount maturing in year five and thereafter. + References No definition available. + Details
Name: | indb_NotionalAmountMaturingInYearFiveAndThereafter
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Notional amount maturing in year four. + References No definition available. + Details
Name: | indb_NotionalAmountMaturingInYearFour
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Notional amount maturing in year three. + References No definition available. + Details
Name: | indb_NotionalAmountMaturingInYearThree
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Notional amount maturing in year two. + References No definition available. + Details
Name: | indb_NotionalAmountMaturingInYearTwo
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Notional and fair value amount of other derivatives not designated as hedging instruments. + References No definition available. + Details
Name: | indb_NotionalAndFairValueAmountOfOtherDerivativesNotDesignatedAsHedgingInstrumentsAbstract
Namespace Prefix: | indb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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 Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13495-108611 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeNumberOfInstrumentsHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TradingActivityByTypeAxis=indb_ReceiveFixedPayVariableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=indb_LoanLevelSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TradingActivityByTypeAxis=indb_PayFixedReceiveVariableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TradingActivityByTypeAxis=indb_BuysForeignExchangeSellsUsCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TradingActivityByTypeAxis=indb_BuysUsCurrencySellsForeignExchangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |