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NON-PERFORMING ASSETS INCLUDING TROUBLED DEBT RESTRUCTURINGS (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
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
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