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NON-PERFORMING ASSETS INCLUDING TROUBLED DEBT RESTRUCTURINGS (Schedule of Recorded Investment of Defaults) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Recorded investment of defaults      
Recorded investment default, total    $ 1,480asrv_CommercialLoanReceivableModificationsRecordedInvestment $ 595asrv_CommercialLoanReceivableModificationsRecordedInvestment
Commercial loan secured by real estate [Member]      
Recorded investment of defaults      
Recorded investment default, total    $ 1,480asrv_CommercialLoanReceivableModificationsRecordedInvestment
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_MortgageLoansOnRealEstateMember		 $ 595asrv_CommercialLoanReceivableModificationsRecordedInvestment
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_MortgageLoansOnRealEstateMember