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Non-performing Assets Including Troubled Debt Restructurings (TDR) (Details Textual) | Sep. 30, 2017 USD ($)
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ALL reserve for TDR's | $ 390,000

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- Definition Allowance for loan and lease losses pertaining to troubled debt restructurings. + References No definition available. + Details
Name: | asrv_AllowanceForLoanAndLeaseLossesTroubledDebtRestructurings
Namespace Prefix: | asrv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant