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NON-PERFORMING ASSETS INCLUDING TROUBLED DEBT RESTRUCTURINGS (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
NON-PERFORMING ASSETS INCLUDING TROUBLED DEBT RESTRUCTURINGS (TDR) [Abstract]    
Aggregate of multiple consecutive maturity date extensions delay in payment, days 120 days  
Borrowers aggregate exposure for loan modification minimum $ 250,000asrv_BorrowersAggregateExposureForLoanModificationMinimum  
Timely payments on contract terms for minimum consecutive months prior to consideration for removing loan from TDR status 6 months  
Minimum consecutive months payment for removing the loan from non-accrual status 6 months  
ALL reserve for loans modified as TDR's $ 520,000asrv_AllowanceForLoanLossesReserveForLoansModifiedAsTroubledDebtRestructurings $ 344,000asrv_AllowanceForLoanLossesReserveForLoansModifiedAsTroubledDebtRestructurings