XML 26 R73.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Disclosures about Fair Value Measurements (Narrative) (Details) (USD $) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013
Disclosures about Fair Value Measurements [Abstract] |  |
Carrying value of impaired loans | $ 1,444,000 | $ 3,066,000
Net fair value of impaired loans | $ 897,000 | $ 2,300,000
Assets and liabilities considered financial instruments, percentage | 90.00% |

X
- Definition Assets and liabilities considered financial instruments, percentage. + References No definition available. + Details
Name: | asrv_AssetsAndLiabilitiesConsideredFinancialInstrumentsPercentage
Namespace Prefix: | asrv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net fair value of impaired loans. + References No definition available. + Details
Name: | asrv_NetFairValueOfImpairedLoans
Namespace Prefix: | asrv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant