XML 73 R55.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Loans, Allowance for Loan Losses and Credit Quality (Textual) (Details) - USD ($) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2016 | Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums | $ 10,900,000 | $ 10,900,000
Significant Advanced Considered For Risk Rating Change | $ 50,000 |
Days to be termed as non accrual loans | 90 days |
Tdrs Recorded Investment On Nonaccrual Status | $ 5,910,000 | $ 5,225,000

X
- Definition Days to be termed as non accrual loans. + References No definition available. + Details
Name: | indb_DaysToBeTermedAsNonAccrualLoans
Namespace Prefix: | indb_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Significant Advanced Considered For Risk Rating Change + References No definition available. + Details
Name: | indb_SignificantAdvancedConsideredForRiskRatingChange
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Troubled Debt Restructurings recorded investment that are on nonaccrual status as of the balance sheet date. + References No definition available. + Details
Name: | indb_TdrsRecordedInvestmentOnNonaccrualStatus
Namespace Prefix: | indb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533 + Details
Name: | us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant