XML 52 R72.htm IDEA: XBRL DOCUMENT
v3.20.1

Lease Commitments - Additional information (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Short Term Equipment Under Lease [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Description Of Accounting Treatment For Short Term Operating Lease | As of March 31, 2020 and December 31, 2019, the Company had one short-term equipment lease which it has elected to not record on the Consolidated Balance Sheets. | As of March 31, 2020 and December 31, 2019, the Company had one short-term equipment lease which it has elected to not record on the Consolidated Balance Sheets.

X
- Definition Description of treatment in the books of account for assets under short term operating leases. + References No definition available. + Details
Name: | asrv_DescriptionOfAccountingTreatmentForShortTermOperatingLease
Namespace Prefix: | asrv_
Data Type: | xbrli:stringItemType
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_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=asrv_ShortTermEquipmentUnderLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |