XML 85 R70.htm IDEA: XBRL DOCUMENT
v3.10.0.1

INVESTMENT SECURITIES (Details Textual) | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) Position | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Investments [Line Items] |  |  |  |
Gross investment gains |  | $ 15,000 | $ 115,000 | $ 183,000
Gross investment losses |  | 454,000 |  | 6,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax |  | (347,000) | 76,000 | 117,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax | [1] | $ (92,000) | 39,000 | 60,000
Investment Securities: |  |  |  |
Consolidated investment securities portfolio modified, years |  | 3 years 8 months 1 day |  |
Proceeds from sales of investment securities — available for sale |  | $ 9,466,000 | 8,143,000 | $ 8,966,000
Book value of securities available for sale and held to maturity |  | $ 115,536,000 | $ 117,181,000 |
Available for sale Securities And Held To Maturity Securities In Unrealized Loss Positions | Position |  | 176 |  |
Corporate bonds [Member] |  |  |  |
Investment Securities: |  |  |  |
Available For Sale Securities Debt Maturities Weighted Average Maturity Term |  | 4 years 3 months 18 days |  |
Weighted Average Expected Maturity For Held To Maturity Securities |  | 3 years 8 months 23 days |  |
Municipal Bonds [Member] |  |  |  |
Investment Securities: |  |  |  |
Available For Sale Securities Debt Maturities Weighted Average Maturity Term |  | 5 years 8 months 23 days |  |
Weighted Average Expected Maturity For Held To Maturity Securities |  | 6 years 7 months 24 days |  |
U.S. Agency [Member] |  |  |  |
Investment Securities: |  |  |  |
Available For Sale Securities Debt Maturities Weighted Average Maturity Term |  | 8 years 10 months 28 days |  |
U.S. Agency mortgage-backed securities [Member] |  |  |  |
Investment Securities: |  |  |  |
Available For Sale Securities Debt Maturities Weighted Average Maturity Term |  | 5 years 7 months 24 days |  |
Weighted Average Expected Maturity For Held To Maturity Securities |  | 6 years 1 month 2 days |  |
Standard & Poor's, AAA Rating [Member] |  |  |  |
Investments [Line Items] |  |  |  |
Portfolio rated |  | 57.50% | 57.80% |
Securities Rated Below A [Member] |  |  |  |
Investments [Line Items] |  |  |  |
Portfolio rated |  | 10.00% | 9.70% |
[1] | Amounts in parentheses indicate credits.

X
- Definition The number of investment securities positions to impaired. + References No definition available. + Details
Name: | asrv_AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesInUnrealizedLossPositions
Namespace Prefix: | asrv_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Available For Sale Securities, Debt Maturities, Weighted Average Maturity Term + References No definition available. + Details
Name: | asrv_AvailableForSaleSecuritiesDebtMaturitiesWeightedAverageMaturityTerm
Namespace Prefix: | asrv_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The carrying value of AFS and HTM securities pledged as collateral. + References No definition available. + Details
Name: | asrv_CarryingValueOfAvailableForSaleHeldToMaturity
Namespace Prefix: | asrv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Consolidated investment securities portfolio modified, years. + References No definition available. + Details
Name: | asrv_ConsolidatedInvestmentSecuritiesPortfolioModifiedYears
Namespace Prefix: | asrv_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Investment securities. + References No definition available. + Details
Name: | asrv_InvestmentSecuritiesAdditionalTextualAbstract
Namespace Prefix: | asrv_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | asrv_InvestmentsLineItems
Namespace Prefix: | asrv_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of investment securities portfolio rated. + References No definition available. + Details
Name: | asrv_PercentageOfInvestmentSecuritiesPortfolioRated
Namespace Prefix: | asrv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of weighted average expected maturity for held to maturity securities. + References No definition available. + Details
Name: | asrv_WeightedAverageExpectedMaturityForHeldToMaturitySecurities
Namespace Prefix: | asrv_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e689-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 17A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL34724391-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e640-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26853-111562 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_MunicipalBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CreditRatingStandardPoorsAxis=srt_StandardPoorsAAARatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CreditRatingStandardPoorsAxis=asrv_SecuritiesRatedBelowAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |