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NON-PERFORMING ASSETS INCLUDING TROUBLED DEBT RESTRUCTURINGS (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012
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NON-PERFORMING ASSETS INCLUDING TROUBLED DEBT RESTRUCTURINGS [Abstract] |
Borrowers aggregate exposure for loan modification, minimum | $ 250

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- Definition Borrowers aggregate exposure for loan modification minimum. + References No definition available. + Details
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Namespace Prefix: | asrv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: | asrv_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration