XML 106 R91.htm IDEA: XBRL DOCUMENT
v3.10.0.1

SHORT-TERM BORROWINGS (Details Textual) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Short-term Debt [Line Items] |  |  |
Average maturity | 1 day | 3 days | 3 days

X
- Definition Debt Instrument, Weighted Average Term. + References No definition available. + Details
Name: | asrv_ShortTermDebtInstrumentWeightedAverageTerm
Namespace Prefix: | asrv_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShortTermDebtLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration