XML 140 R112.htm IDEA: XBRL DOCUMENT
v3.8.0.1

INCOME TAXES (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Tax Expense related to a change in tax law | $ 2,361,000 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 466,000 | $ 0 | $ 0
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount |  |  |  |  |  |  |  |  | 21,000 |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense |  |  |  |  |  |  |  |  | 18,000 | 11,000 | $ 0
Deferred Tax Assets, Operating Loss Carryforwards | 127,000 |  |  |  | 69,000 |  |  |  | $ 127,000 | $ 69,000 |
Computed statutory federal income tax provision |  |  |  |  |  |  |  |  | 35.00% | 35.00% | 35.00%
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 29,000 |  |  |  | $ 11,000 |  |  |  | $ 29,000 | $ 11,000 |
Net Deferred Tax Asset [Member] |  |  |  |  |  |  |  |  |  |  |
Tax Expense related to a change in tax law | 1,895,000 |  |  |  |  |  |  |  | 1,900,000 |  |
Investments in Low Income Housing Projects [Member] |  |  |  |  |  |  |  |  |  |  |
Tax Expense related to a change in tax law | 466,000 |  |  |  |  |  |  |  | 466,000 |  |
Deferred Tax Assets, Operating Loss Carryforwards | $ 121,000 |  |  |  |  |  |  |  | $ 121,000 |  |

X
- Definition Tax Expense incurred as a result of a change in tax law + References No definition available. + Details
Name: | indb_TaxExpenserelatedtoachangeintaxlaw
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions, federal benefit of state tax amount + References No definition available. + Details
Name: | indb_UnrecognizedTaxBenefitsIncreaseResultingfromCurrentPeriodTaxPositionsfederalbenefitofstatetaxamount
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96869850&loc=d3e28680-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 + Details
Name: | us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
Name: | us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | indb_NetDeferredTaxassetAxis=indb_NetDeferredTaxAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | indb_InvestmentsinLowIncomeHousingProjectsAxis=indb_InvestmentsinLowIncomeHousingProjectsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |