XML 72 R59.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Allowance for Loan Losses (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Individual loan balance is classified as nonaccrual status or troubled debt restructure | $ 100,000 |  | $ 100,000 |
Allowance for Loan and Lease Losses, Adjustments, Other | 0 | $ 200,000 | 100,000 | $ 750,000
Allowance for Loan and Lease Losses Write-offs, Net |  |  | $ 875,000 | $ 336,000
Allowance For Loan And Lease Losses Write Off Percentage |  |  | 0.13% | 0.05%
Commercial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Threshold for individually evaluating loans | 250,000 |  | $ 250,000 |
Pass [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Minimum individual loan balance requiring quarterly review | 1,000,000 |  | 1,000,000 |
Special Mention [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Minimum individual loan balance requiring quarterly review | 250,000 |  | 250,000 |
Doubtful [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Minimum individual loan balance requiring quarterly review | $ 100,000 |  | $ 100,000 |
Minimum [Member] | Commercial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Minimum percent of portfolio to be reviewed |  |  | 50.00% |
Maximum [Member] | Commercial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Minimum percent of portfolio to be reviewed |  |  | 55.00% |

X
- Definition The percentage of after recoveries, of loans and leases that have been written-off. + References No definition available. + Details
Name: | asrv_AllowanceForLoanAndLeaseLossesWriteOffPercentage
Namespace Prefix: | asrv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing Receivable, Minimum Percent Required To Be Reviewed. + References No definition available. + Details
Name: | asrv_FinancingReceivableMinimumPercentRequiredToBeReviewed
Namespace Prefix: | asrv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing Receivable, Threshold Balance Which Requires Quarterly Reviews. + References No definition available. + Details
Name: | asrv_FinancingReceivableThresholdBalanceWhichRequiresQuarterlyReviews
Namespace Prefix: | asrv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing Receivable, Allowance For Credit Losses, Threshold For Individually Evaluating Of Impairment. + References No definition available. + Details
Name: | asrv_FinancingReceivableThresholdForIndividuallyEvaluatingOfImpairment
Namespace Prefix: | asrv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Individual loan balance is classified as nonaccrual status or troubled debt restructure. + References No definition available. + Details
Name: | asrv_IndividualLoanBalanceIsClassifiedAsNonaccrualStatusOrTroubledDebtRestructure
Namespace Prefix: | asrv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of other addition (reduction) in allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesAdjustmentsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, after recoveries, of loans and leases that have been written-off. + References No definition available. + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=asrv_CommercialLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |