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INVESTMENT SECURITIES (Schedule of Contractual Maturities of Securities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Contractual maturities of securities
Available for Sale, Cost Basis, Within 1 year	$ 1,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost
Available for Sale, Cost Basis, After 1 year but within 5 years	14,626us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost
Available for Sale, Cost Basis, After 5 years but within 10 years	17,838us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost
Available for Sale, Cost Basis, After 10 years but within15 years	56,783asrv_AvailableforsaleSecuritiesDebtMaturitiesAfterTenThroughFifteenYearsAmortizedCostBasis
Available for Sale, Cost Basis, Over 15 years	34,069asrv_AvailableforsaleSecuritiesDebtMaturitiesAfterFifteenYearsAmortizedCost
Available for Sale, Cost Basis, Total	124,316us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Available for Sale, Within 1 year, Yield	2.00%asrv_AvailableForSaleSecuritiesDebtMaturitiesYieldWithinOneYear
Available for Sale, After 1 year but within 5 years, Yield	1.96%asrv_AvailableForSaleSecuritiesDebtMaturitiesYieldAfterOneThroughFiveYears
Available for Sale, After 5 year but within 10 years, Yield	2.46%asrv_AvailableForSaleSecuritiesDebtMaturitiesYieldAfterFiveThroughTenYears
Available for Sale, After 10 year but within 15 years, Yield	2.66%asrv_AvailableForSaleSecuritiesDebtMaturitiesYieldAfterTenThroughFifteenYears
Available for Sale, Over 15 years, Yield	2.56%asrv_AvailableForSaleSecuritiesDebtMaturitiesYieldAfterFifteenYears
Available for Sale, Yield, Total	2.52%asrv_AvailableForSaleSecuritiesDebtMaturitiesYield
Available for Sale, Fair Value, Within 1 year	1,013us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue
Available for Sale, Fair Value, After 1 year but within 5 years	14,675us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue
Available for Sale, Fair Value, After 5 years but within 10 years	18,116us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue
Available for Sale, Fair Value, After 10 years but within15 years	58,141asrv_AvailableforsaleSecuritiesDebtMaturitiesAfterTenThroughFifteenYearsFairValue
Available for Sale, Fair Value, Over 15 years	35,165asrv_AvailableforsaleSecuritiesDebtMaturitiesAfterFifteenYearsFairValue
Available for Sale, Fair Value, Total	127,110us-gaap_AvailableForSaleSecurities	141,978us-gaap_AvailableForSaleSecurities
Held to Maturity, Cost Basis, Within 1 year	2,000us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount
Held to Maturity, Cost Basis, After 1 year but within 5 years	1,000us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount
Held to Maturity, Cost Basis, After 5 years but within 10 years	3,810us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount
Held to Maturity, Cost Basis, After 10 years but within 15 years	1,162asrv_HeldtomaturitySecuritiesDebtMaturitiesAfterTenThroughFifteenYearsNetCarryingAmount
Held to Maturity, Cost Basis, Over 15 years	11,868asrv_HeldtomaturitySecuritiesDebtMaturitiesAfterFifteenYearsNetCarryingAmount
Held to Maturity, Cost Basis, Total	19,840us-gaap_HeldToMaturitySecurities	18,187us-gaap_HeldToMaturitySecurities
Held to Maturity, Within 1 year, Yield	1.35%asrv_HeldToMaturitySecuritiesDebtMaturitiesYieldWithinOneYear
Held to Maturity, After 1 year but within 5 years, Yield	1.67%asrv_HeldToMaturitySecuritiesDebtMaturitiesYieldAfterOneThroughFiveYears
Held to Maturity, After 5 years but within 10 years, Yield	2.67%asrv_HeldToMaturitySecuritiesDebtMaturitiesYieldAfterFiveThroughTenYears
Held to Maturity, After 10 years but within 15 years, Yield	3.27%asrv_HeldToMaturitySecuritiesDebtMaturitiesYieldAfterTenThroughFifteenYears
Held to Maturity, Over 15 years, Yield	3.66%asrv_HeldToMaturitySecuritiesDebtMaturitiesYieldAfterFifteenYears
Held to Maturity, Yield, Total	3.11%asrv_HeldToMaturitySecuritiesDebtMaturitiesYield
Held to Maturity, Fair Value, Within 1 year	1,991us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue
Held to Maturity, Fair Value, After 1 year but within 5 years	981us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue
Held to Maturity, Fair Value, After 5 years but within 10 years	3,799us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue
Held to Maturity, Fair Value, After 10 years but within 15 years	1,140asrv_HeldtomaturitySecuritiesDebtMaturitiesAfterTenThroughFifteenYearsFairValue
Held to Maturity, Fair Value, Over 15 years	12,302asrv_HeldtomaturitySecuritiesDebtMaturitiesAfterFifteenYearsFairValue
Held to Maturity, Fair Value, Total	20,213us-gaap_HeldToMaturitySecuritiesFairValue	17,788us-gaap_HeldToMaturitySecuritiesFairValue
U.S. Agency [Member]
Contractual maturities of securities
Available for Sale, Cost Basis, Within 1 year	1,000us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Available for Sale, Cost Basis, After 1 year but within 5 years	4,931us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Available for Sale, Cost Basis, After 5 years but within 10 years
Available for Sale, Cost Basis, After 10 years but within15 years
Available for Sale, Cost Basis, Over 15 years
Available for Sale, Cost Basis, Total	5,931us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Available for Sale, Within 1 year, Yield	2.00%asrv_AvailableForSaleSecuritiesDebtMaturitiesYieldWithinOneYear / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Available for Sale, After 1 year but within 5 years, Yield	1.38%asrv_AvailableForSaleSecuritiesDebtMaturitiesYieldAfterOneThroughFiveYears / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Available for Sale, After 5 year but within 10 years, Yield
Available for Sale, After 10 year but within 15 years, Yield
Available for Sale, Over 15 years, Yield
Available for Sale, Yield, Total	1.48%asrv_AvailableForSaleSecuritiesDebtMaturitiesYield / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Available for Sale, Fair Value, Within 1 year	1,013us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Available for Sale, Fair Value, After 1 year but within 5 years	4,893us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Available for Sale, Fair Value, After 5 years but within 10 years
Available for Sale, Fair Value, After 10 years but within15 years
Available for Sale, Fair Value, Over 15 years
Available for Sale, Fair Value, Total	5,906us-gaap_AvailableForSaleSecurities / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember	6,835us-gaap_AvailableForSaleSecurities / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember
U.S. Agency mortgage-backed securities [Member]
Contractual maturities of securities
Available for Sale, Cost Basis, Within 1 year
Available for Sale, Cost Basis, After 1 year but within 5 years	1,696us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, Cost Basis, After 5 years but within 10 years	10,340us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, Cost Basis, After 10 years but within15 years	56,783asrv_AvailableforsaleSecuritiesDebtMaturitiesAfterTenThroughFifteenYearsAmortizedCostBasis / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, Cost Basis, Over 15 years	34,069asrv_AvailableforsaleSecuritiesDebtMaturitiesAfterFifteenYearsAmortizedCost / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, Cost Basis, Total	102,888us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, Within 1 year, Yield
Available for Sale, After 1 year but within 5 years, Yield	4.46%asrv_AvailableForSaleSecuritiesDebtMaturitiesYieldAfterOneThroughFiveYears / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, After 5 year but within 10 years, Yield	2.74%asrv_AvailableForSaleSecuritiesDebtMaturitiesYieldAfterFiveThroughTenYears / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, After 10 year but within 15 years, Yield	2.66%asrv_AvailableForSaleSecuritiesDebtMaturitiesYieldAfterTenThroughFifteenYears / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, Over 15 years, Yield	2.56%asrv_AvailableForSaleSecuritiesDebtMaturitiesYieldAfterFifteenYears / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, Yield, Total	2.66%asrv_AvailableForSaleSecuritiesDebtMaturitiesYield / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, Fair Value, Within 1 year
Available for Sale, Fair Value, After 1 year but within 5 years	1,791us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, Fair Value, After 5 years but within 10 years	10,671us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, Fair Value, After 10 years but within15 years	58,141asrv_AvailableforsaleSecuritiesDebtMaturitiesAfterTenThroughFifteenYearsFairValue / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, Fair Value, Over 15 years	35,165asrv_AvailableforsaleSecuritiesDebtMaturitiesAfterFifteenYearsFairValue / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Available for Sale, Fair Value, Total	105,768us-gaap_AvailableForSaleSecurities / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember	123,382us-gaap_AvailableForSaleSecurities / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Held to Maturity, Cost Basis, Within 1 year
Held to Maturity, Cost Basis, After 1 year but within 5 years
Held to Maturity, Cost Basis, After 5 years but within 10 years	2,959us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Held to Maturity, Cost Basis, After 10 years but within 15 years
Held to Maturity, Cost Basis, Over 15 years	9,522asrv_HeldtomaturitySecuritiesDebtMaturitiesAfterFifteenYearsNetCarryingAmount / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Held to Maturity, Cost Basis, Total	12,481us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember	12,671us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Held to Maturity, Within 1 year, Yield
Held to Maturity, After 1 year but within 5 years, Yield
Held to Maturity, After 5 years but within 10 years, Yield	2.40%asrv_HeldToMaturitySecuritiesDebtMaturitiesYieldAfterFiveThroughTenYears / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Held to Maturity, After 10 years but within 15 years, Yield
Held to Maturity, Over 15 years, Yield	3.45%asrv_HeldToMaturitySecuritiesDebtMaturitiesYieldAfterFifteenYears / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Held to Maturity, Yield, Total	3.20%asrv_HeldToMaturitySecuritiesDebtMaturitiesYield / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Held to Maturity, Fair Value, Within 1 year
Held to Maturity, Fair Value, After 1 year but within 5 years
Held to Maturity, Fair Value, After 5 years but within 10 years	2,931us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Held to Maturity, Fair Value, After 10 years but within 15 years
Held to Maturity, Fair Value, Over 15 years	9,895asrv_HeldtomaturitySecuritiesDebtMaturitiesAfterFifteenYearsFairValue / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Held to Maturity, Fair Value, Total	12,826us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember	12,483us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_DebtSecurityAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Corporate bonds [Member]
Contractual maturities of securities
Available for Sale, Cost Basis, Within 1 year
Available for Sale, Cost Basis, After 1 year but within 5 years	7,999us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost / us-gaap_DebtSecurityAxis = us-gaap_CorporateBondSecuritiesMember
Available for Sale, Cost Basis, After 5 years but within 10 years	7,498us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost / us-gaap_DebtSecurityAxis = us-gaap_CorporateBondSecuritiesMember
Available for Sale, Cost Basis, After 10 years but within15 years
Available for Sale, Cost Basis, Over 15 years
Available for Sale, Cost Basis, Total	15,497us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_DebtSecurityAxis = us-gaap_CorporateBondSecuritiesMember
Available for Sale, Within 1 year, Yield
Available for Sale, After 1 year but within 5 years, Yield	1.75%asrv_AvailableForSaleSecuritiesDebtMaturitiesYieldAfterOneThroughFiveYears / us-gaap_DebtSecurityAxis = us-gaap_CorporateBondSecuritiesMember
Available for Sale, After 5 year but within 10 years, Yield	2.05%asrv_AvailableForSaleSecuritiesDebtMaturitiesYieldAfterFiveThroughTenYears / us-gaap_DebtSecurityAxis = us-gaap_CorporateBondSecuritiesMember
Available for Sale, After 10 year but within 15 years, Yield
Available for Sale, Over 15 years, Yield
Available for Sale, Yield, Total	1.90%asrv_AvailableForSaleSecuritiesDebtMaturitiesYield / us-gaap_DebtSecurityAxis = us-gaap_CorporateBondSecuritiesMember
Available for Sale, Fair Value, Within 1 year
Available for Sale, Fair Value, After 1 year but within 5 years	7,991us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue / us-gaap_DebtSecurityAxis = us-gaap_CorporateBondSecuritiesMember
Available for Sale, Fair Value, After 5 years but within 10 years	7,445us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue / us-gaap_DebtSecurityAxis = us-gaap_CorporateBondSecuritiesMember
Available for Sale, Fair Value, After 10 years but within15 years
Available for Sale, Fair Value, Over 15 years
Available for Sale, Fair Value, Total	15,436us-gaap_AvailableForSaleSecurities / us-gaap_DebtSecurityAxis = us-gaap_CorporateBondSecuritiesMember	11,761us-gaap_AvailableForSaleSecurities / us-gaap_DebtSecurityAxis = us-gaap_CorporateBondSecuritiesMember
Corporate bonds and other securities [Member]
Contractual maturities of securities
Held to Maturity, Cost Basis, Within 1 year	2,000us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Cost Basis, After 1 year but within 5 years	1,000us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Cost Basis, After 5 years but within 10 years	851us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Cost Basis, After 10 years but within 15 years	1,162asrv_HeldtomaturitySecuritiesDebtMaturitiesAfterTenThroughFifteenYearsNetCarryingAmount / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Cost Basis, Over 15 years	2,346asrv_HeldtomaturitySecuritiesDebtMaturitiesAfterFifteenYearsNetCarryingAmount / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Cost Basis, Total	7,359us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Within 1 year, Yield	1.35%asrv_HeldToMaturitySecuritiesDebtMaturitiesYieldWithinOneYear / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, After 1 year but within 5 years, Yield	1.67%asrv_HeldToMaturitySecuritiesDebtMaturitiesYieldAfterOneThroughFiveYears / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, After 5 years but within 10 years, Yield	3.63%asrv_HeldToMaturitySecuritiesDebtMaturitiesYieldAfterFiveThroughTenYears / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, After 10 years but within 15 years, Yield	3.27%asrv_HeldToMaturitySecuritiesDebtMaturitiesYieldAfterTenThroughFifteenYears / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Over 15 years, Yield	4.49%asrv_HeldToMaturitySecuritiesDebtMaturitiesYieldAfterFifteenYears / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Yield, Total	2.96%asrv_HeldToMaturitySecuritiesDebtMaturitiesYield / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Fair Value, Within 1 year	1,991us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Fair Value, After 1 year but within 5 years	981us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Fair Value, After 5 years but within 10 years	868us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Fair Value, After 10 years but within 15 years	1,140asrv_HeldtomaturitySecuritiesDebtMaturitiesAfterTenThroughFifteenYearsFairValue / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Fair Value, Over 15 years	2,407asrv_HeldtomaturitySecuritiesDebtMaturitiesAfterFifteenYearsFairValue / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember
Held to Maturity, Fair Value, Total	$ 7,387us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_DebtSecurityAxis = asrv_CorporateBondsAndOtherSecuritiesMember

X

- Definition

Available-for-sale securities debt maturities after fifteen years amortized cost.

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No definition available.

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- Definition

Available-for-sale securities debt maturities after fifteen years fair value.

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No definition available.

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- Definition

Available-for-sale securities debt maturities after ten through fifteen years amortized cost basis.

+ References

No definition available.

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- Definition

Available-for-sale securities debt maturities after ten through fifteen years fair value.

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No definition available.

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- Definition

This item represents the yield percent of debt securities which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

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- Definition

This item represents the yield percent of debt securities which are expected to mature after fifteen years of the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

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- Definition

This item represents the yield percent of debt securities which are expected to mature after five years through ten years of the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

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- Definition

This item represents the yield percent of debt securities which are expected to mature after one year through five years of the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

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- Definition

This item represents the yield percent of debt securities which are expected to mature after ten years through fifteen years of the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

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- Definition

This item represents the yield percent of debt securities which are expected to mature within one year of the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

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- Definition

Held-to-maturity securities debt maturities after fifteen years fair value.

+ References

No definition available.

+ Details

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- Definition

Held-to-maturity securities debt maturities after fifteen years net carrying amount.

+ References

No definition available.

+ Details

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- Definition

Amount of held-to-maturity debt securities at fair value maturing in the tenth fiscal year through the fifteenth fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

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- Definition

Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, maturing in the tenth through fifteenth fiscal year following the latest fiscal year.

+ References

No definition available.

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