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LOANS, ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Loans, Allowance for Loan Losses and Credit Quality [Abstract]      
Days To Be Termed As Non Accrual Loans 90 days    
The amount of deferred fees $ 2,800,000us-gaap_AmortizationOfDeferredLoanOriginationFeesNet $ 2,300,000us-gaap_AmortizationOfDeferredLoanOriginationFeesNet $ 3,100,000us-gaap_AmortizationOfDeferredLoanOriginationFeesNet
Significant advanced considered for risk rating change 50,000indb_SignificantAdvancedConsideredForRiskRatingChange    
TDRs on nonaccrual status $ 5,248,000indb_TdrsRecordedInvestmentOnNonaccrualStatus $ 7,454,000indb_TdrsRecordedInvestmentOnNonaccrualStatus