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v3.19.1

Non-performing Assets Including Troubled Debt Restructurings (TDR) (Details Textual) - USD ($) | Mar. 31, 2019 | Dec. 31, 2018
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ALL reserve for TDR's | $ 11,000 | $ 11,000

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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