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v2.4.0.6

Accounting Policies (Details) | 3 Months Ended
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Mar. 31, 2013
Accounting Policies [Abstract] |
More-likely-than-not-threshold percentage | 50.00%

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- Definition More-likely-than-not threshold percentage. + References No definition available. + Details
Name: | asrv_MoreLikelyThanNotThresholdPercentage
Namespace Prefix: | asrv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration