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

X

- 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