$ASRV
AMERISERV FINANCIAL INC /PA/ Stock $asrv

$asrv Overview Financials Valuation SEC Filings Company Website

2016 Q4 Form 10-K Financial Statement

#000114420418012402 Filed on March 02, 2018

Income Statement

Concept	2016 Q4	2016 Q3	2016 Q2
Revenue	$10.58M	$10.48M	$10.39M
YoY Change	2.92%	-1.79%	-0.19%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$490.0K	$420.0K	$440.0K
YoY Change	11.36%	0.0%	-6.38%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$1.998M	$1.970M	$1.903M
YoY Change	18.22%	20.71%	18.27%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$1.573M	$1.511M	$1.939M
YoY Change	-11.13%	-40.3%	-5.55%
Income Tax	$423.0K	$446.0K	$577.0K
% Of Pretax Income	26.89%	29.52%	29.76%
Net Earnings	$1.150M	$1.065M	$1.362M
YoY Change	-16.3%	-41.9%	-4.15%
Net Earnings / Revenue	10.87%	10.17%	13.11%
Basic Earnings Per Share	$0.06	$0.06	$0.07
Diluted Earnings Per Share	$0.06	$0.06	$0.07
COMMON SHARES
Basic Shares Outstanding	18.90M shares	18.90M shares	18.90M shares
Diluted Shares Outstanding		18.96M shares	18.95M shares

Balance Sheet

Concept	2016 Q4	2016 Q3	2016 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$34.07M	$30.52M	$27.02M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$11.70M	$11.80M	$11.90M
YoY Change	-3.37%	-4.55%	-5.29%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$10.70M	$8.600M	$8.800M
YoY Change	18.89%	3.61%	-2.22%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.154B	$1.146B	$1.143B
YoY Change	0.46%	3.14%	2.66%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$12.80M	$7.900M	$22.60M
YoY Change	-73.72%	-85.09%	-64.35%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$12.80M	$7.900M	$22.60M
YoY Change	-73.72%	-85.09%	-64.35%
LONG-TERM LIABILITIES
Long-Term Debt	$20.30M	$20.30M	$20.30M
YoY Change	0.0%	54.96%	54.96%
Other Long-Term Liabilities	$12.00M	$5.600M	$9.400M
YoY Change	30.43%	-25.33%	-7.84%
Total Long-Term Liabilities	$32.30M	$25.90M	$29.70M
YoY Change	9.49%	25.73%	27.47%
TOTAL LIABILITIES
Total Short-Term Liabilities	$12.80M	$7.900M	$22.60M
Total Long-Term Liabilities	$32.30M	$25.90M	$29.70M
Total Liabilities	$1.058B	$1.046B	$1.043B
YoY Change	2.76%	5.46%	4.79%
SHAREHOLDERS EQUITY
Retained Earnings	$36.00M
YoY Change	3.9%
Common Stock	$145.8M
YoY Change	0.06%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$74.83M
YoY Change	0.0%
Treasury Stock Shares	7.618M shares	7.618M shares	7.618M shares
Shareholders Equity	$95.40M	$100.0M	$99.20M
YoY Change
Total Liabilities & Shareholders Equity	$1.154B	$1.146B	$1.143B
YoY Change	0.42%	3.14%	2.66%

Cashflow Statement

Concept	2016 Q4	2016 Q3	2016 Q2
OPERATING ACTIVITIES
Net Income	$1.150M	$1.065M	$1.362M
YoY Change	-16.3%	-41.9%	-4.15%
Depreciation, Depletion And Amortization	$490.0K	$420.0K	$440.0K
YoY Change	11.36%	0.0%	-6.38%
Cash From Operating Activities	$8.970M	-$6.700M	$4.000M
YoY Change	174.31%	-537.91%	78.57%
INVESTING ACTIVITIES
Capital Expenditures	-$370.0K	-$350.0K	-$430.0K
YoY Change	94.74%	59.09%	72.0%
Acquisitions
YoY Change
Other Investing Activities	-$11.17M	$4.710M	-$17.81M
YoY Change	-50.68%	-14.98%	24.37%
Cash From Investing Activities	-$11.54M	$4.360M	-$18.24M
YoY Change	-49.5%	-18.05%	25.19%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	6.120M	5.850M	17.63M
YoY Change	-83.15%	-446.15%	115.0%
NET CHANGE
Cash From Operating Activities	8.970M	-6.700M	4.000M
Cash From Investing Activities	-11.54M	4.360M	-18.24M
Cash From Financing Activities	6.120M	5.850M	17.63M
Net Change In Cash	3.550M	3.510M	3.390M
YoY Change	-78.81%	-31.98%	-182.08%
FREE CASH FLOW
Cash From Operating Activities	$8.970M	-$6.700M	$4.000M
Capital Expenditures	-$370.0K	-$350.0K	-$430.0K
Free Cash Flow	$9.340M	-$6.350M	$4.430M
YoY Change	169.94%	-462.86%	77.91%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2016	us-gaap	Interest Income Money Market Deposits InterestIncomeMoneyMarketDeposits	84000	USD
CY2016	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	3132000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	266000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1153780000	USD
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	78233000	USD
CY2016Q4	us-gaap	Subordinated Debt SubordinatedDebt	7441000	USD
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	74829000	USD
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	145707000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	40312000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	36001000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-11577000	USD
CY2017Q4	us-gaap	Subordinated Debt SubordinatedDebt	7465000	USD
CY2016Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	145535000	USD
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	265000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-12950000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	95102000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	95395000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1167655000	USD
CY2016	us-gaap	Interest And Dividend Income Securities Held To Maturity InterestAndDividendIncomeSecuritiesHeldToMaturity	779000	USD
CY2016	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	41869000	USD
CY2016	us-gaap	Interest Expense Deposits InterestExpenseDeposits	5400000	USD
CY2016	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Short Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm	52000	USD
CY2016	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	644000	USD
CY2016	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	1120000	USD
CY2016	us-gaap	Interest Expense InterestExpense	7735000	USD
CY2016	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	34134000	USD
CY2016	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	3950000	USD
CY2016	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	30184000	USD
CY2016	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	8333000	USD
CY2016	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	1674000	USD
CY2016	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	884000	USD
CY2016	us-gaap	Fees And Commissions Mortgage Banking FeesAndCommissionsMortgageBanking	367000	USD
CY2016	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	177000	USD
CY2016	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	675000	USD
CY2016	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2528000	USD
CY2016	us-gaap	Noninterest Income NoninterestIncome	14638000	USD
CY2016	us-gaap	Labor And Related Expense LaborAndRelatedExpense	24034000	USD
CY2016	us-gaap	Occupancy Net OccupancyNet	2782000	USD
CY2016	us-gaap	Equipment Expense EquipmentExpense	1688000	USD
CY2016	us-gaap	Professional Fees ProfessionalFees	5280000	USD
CY2016	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	705000	USD
CY2016	us-gaap	Taxes Other TaxesOther	1146000	USD
CY2016	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	709000	USD
CY2016	us-gaap	Other Noninterest Expense OtherNoninterestExpense	5271000	USD
CY2016	us-gaap	Noninterest Expense NoninterestExpense	41615000	USD
CY2016	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	519000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3207000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	2310000	USD
CY2016	us-gaap	Dividends Preferred Stock DividendsPreferredStock	15000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2295000	USD
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.12
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.12
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.05
CY2015	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	8000	USD
CY2017	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	11000	USD
CY2015	us-gaap	Interest Income Money Market Deposits InterestIncomeMoneyMarketDeposits	14000	USD
CY2017	us-gaap	Interest Income Money Market Deposits InterestIncomeMoneyMarketDeposits	130000	USD
CY2015	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	3250000	USD
CY2017	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	3800000	USD
CY2015	us-gaap	Interest And Dividend Income Securities Held To Maturity InterestAndDividendIncomeSecuritiesHeldToMaturity	614000	USD
CY2017	us-gaap	Interest And Dividend Income Securities Held To Maturity InterestAndDividendIncomeSecuritiesHeldToMaturity	1198000	USD
CY2015	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	41881000	USD
CY2017	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	44356000	USD
CY2015	us-gaap	Interest Expense Deposits InterestExpenseDeposits	4752000	USD
CY2017	us-gaap	Interest Expense Deposits InterestExpenseDeposits	6255000	USD
CY2015	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Short Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm	86000	USD
CY2017	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Short Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm	206000	USD
CY2015	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	558000	USD
CY2017	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	694000	USD
CY2015	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	1120000	USD
CY2017	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	1120000	USD
CY2015	us-gaap	Interest Expense InterestExpense	6520000	USD
CY2017	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	34761000	USD
CY2017	us-gaap	Interest Expense InterestExpense	8795000	USD
CY2015	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	35361000	USD
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	35561000	USD
CY2015	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	1250000	USD
CY2017	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	800000	USD
CY2015	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	34111000	USD
CY2015	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	8344000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-1712000	USD
CY2017	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	8462000	USD
CY2015	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	1750000	USD
CY2017	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	1581000	USD
CY2015	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	767000	USD
CY2017	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	679000	USD
CY2015	us-gaap	Fees And Commissions Mortgage Banking FeesAndCommissionsMortgageBanking	391000	USD
CY2017	us-gaap	Fees And Commissions Mortgage Banking FeesAndCommissionsMortgageBanking	285000	USD
CY2015	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	71000	USD
CY2017	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	115000	USD
CY2015	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1617000	USD
CY2017	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	737000	USD
CY2015	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2327000	USD
CY2017	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2786000	USD
CY2015	us-gaap	Noninterest Income NoninterestIncome	15267000	USD
CY2017	us-gaap	Noninterest Income NoninterestIncome	14645000	USD
CY2015	us-gaap	Labor And Related Expense LaborAndRelatedExpense	24042000	USD
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	24127000	USD
CY2015	us-gaap	Occupancy Net OccupancyNet	2941000	USD
CY2017	us-gaap	Occupancy Net OccupancyNet	2600000	USD
CY2015	us-gaap	Equipment Expense EquipmentExpense	1773000	USD
CY2017	us-gaap	Equipment Expense EquipmentExpense	1585000	USD
CY2015	us-gaap	Professional Fees ProfessionalFees	5003000	USD
CY2017	us-gaap	Professional Fees ProfessionalFees	5058000	USD
CY2015	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	726000	USD
CY2017	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	676000	USD
CY2015	us-gaap	Taxes Other TaxesOther	1157000	USD
CY2017	us-gaap	Taxes Other TaxesOther	1234000	USD
CY2015	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	669000	USD
CY2017	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	628000	USD
CY2015	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4727000	USD
CY2017	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4858000	USD
CY2015	us-gaap	Noninterest Expense NoninterestExpense	41038000	USD
CY2017	us-gaap	Noninterest Expense NoninterestExpense	40766000	USD
CY2017	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	520000	USD
CY2015	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	4000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5347000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2343000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	8640000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	8340000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	3293000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	5997000	USD
CY2017	us-gaap	Dividends Preferred Stock DividendsPreferredStock	0	USD
CY2015	us-gaap	Dividends Preferred Stock DividendsPreferredStock	210000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3293000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	5787000	USD
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.18
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.31
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.18
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.06
CY2015	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.04
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	897000	USD
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18955000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18600000	shares
CY2016Q4	asrv	Investment Securities Continuous Unrealized Loss Position Fair Value InvestmentSecuritiesContinuousUnrealizedLossPositionFairValue	92335000	USD
CY2017Q4	asrv	Tier One Risk Based Common Equity Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCommonEquityRequiredForCapitalAdequacyToRiskWeightedAssets	0.045	pure
CY2017Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.06	pure
CY2017Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.04	pure
CY2017Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.1	pure
CY2017Q4	asrv	Tieroneriskbasedcommonequityrequiredfortobewellcapitalizedtoriskweightedassets Tieroneriskbasedcommonequityrequiredfortobewellcapitalizedtoriskweightedassets	0.065	pure
CY2017Q4	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized To Average Assets TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets	0.05	pure
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18933000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18896000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18498000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18863000	shares
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	4612000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	1569000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-1305000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-443000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	177000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	60000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4022000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	-1303000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	-579000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-442000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	-197000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-40000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-1498000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-13000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-509000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	115000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	71000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	39000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	25000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	758000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-653000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4051000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	5344000	USD
CY2017	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	1665000	USD
CY2015	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	1790000	USD
CY2017	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-436000	USD
CY2015	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-342000	USD
CY2017	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	115000	USD
CY2015	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	71000	USD
CY2017	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	679000	USD
CY2015	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	767000	USD
CY2017	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	162000	USD
CY2015	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	249000	USD
CY2017	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	45637000	USD
CY2015	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	51759000	USD
CY2017	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	46285000	USD
CY2015	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	54574000	USD
CY2017	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	487000	USD
CY2015	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-70000	USD
CY2017	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	114000	USD
CY2015	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-55000	USD
CY2017	asrv	Other Bank Owned Life Insurance Income OtherBankOwnedLifeInsuranceIncome	571000	USD
CY2015	asrv	Other Bank Owned Life Insurance Income OtherBankOwnedLifeInsuranceIncome	690000	USD
CY2017	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	4303000	USD
CY2015	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	888000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1776000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1674000	USD
CY2017	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	10572000	USD
CY2015	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	6237000	USD
CY2017	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	17661000	USD
CY2015	us-gaap	Other Amortization Of Deferred Charges OtherAmortizationOfDeferredCharges	0	USD
CY2015	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	9868000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7681000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	9832000	USD
CY2015	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	19320000	USD
CY2017	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-16345000	USD
CY2015	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-18740000	USD
CY2017	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	154054000	USD
CY2015	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	246304000	USD
CY2017	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	157258000	USD
CY2015	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	183380000	USD
CY2017	us-gaap	Payments To Acquire Loans Held For Investment PaymentsToAcquireLoansHeldForInvestment	11804000	USD
CY2015	us-gaap	Payments To Acquire Loans Held For Investment PaymentsToAcquireLoansHeldForInvestment	15019000	USD
CY2017	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	2800000	USD
CY2015	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	23774000	USD
CY2017	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	108000	USD
CY2015	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	579000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-20225000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-49855000	USD
CY2017	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	36330000	USD
CY2017	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	12687000	USD
CY2015	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	10000000	USD
CY2017	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	12000000	USD
CY2015	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	4000000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1113000	USD
CY2015	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	754000	USD
CY2017	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	0	USD
CY2015	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	210000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	12659000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	55661000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	115000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	15638000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	32872000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	48510000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	22311000	USD
CY2015	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	24532000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	2383000	USD
CY2015	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	4601000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	8143000	USD
CY2015	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	3570000	USD
CY2017	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0	USD
CY2015	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0	USD
CY2017	us-gaap	Other Amortization Of Deferred Charges OtherAmortizationOfDeferredCharges	39000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	173000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	186000	USD
CY2017	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-19841000	USD
CY2015	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	33339000	USD
CY2015	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1598000	USD
CY2017	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	614000	USD
CY2016	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	1803000	USD
CY2016	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-488000	USD
CY2016	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	177000	USD
CY2016	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	884000	USD
CY2016	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	231000	USD
CY2016Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	510000	USD
CY2016Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	30420000	USD
CY2017Q4	asrv	Investment Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value InvestmentSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	58486000	USD
CY2017Q4	asrv	Investment Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses Accumulated In Aoci InvestmentSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInAOCI	472000	USD
CY2016	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	59252000	USD
CY2016	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	60045000	USD
CY2016	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	59000	USD
CY2016	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-11000	USD
CY2016	asrv	Other Bank Owned Life Insurance Income OtherBankOwnedLifeInsuranceIncome	675000	USD
CY2016	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	414000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1186000	USD
CY2016	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	12038000	USD
CY2016	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	10911000	USD
CY2016	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-12180000	USD
CY2016	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	196998000	USD
CY2016	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	18900000	USD
CY2016	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	235000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-25185000	USD
CY2016	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-35994000	USD
CY2016	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	9542000	USD
CY2016	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	12000000	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	945000	USD
CY2016	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	15000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	4080000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-14437000	USD
CY2016	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	24574000	USD
CY2016	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	2693000	USD
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	8966000	USD
CY2016	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	21000000	USD
CY2016	us-gaap	Other Amortization Of Deferred Charges OtherAmortizationOfDeferredCharges	39000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	6668000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	94000	USD
CY2016	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	64492000	USD
CY2016	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
CY2016	asrv	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	59000	shares
CY2017	asrv	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	102000	shares
CY2015	asrv	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	70000	shares
CY2017Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	129550000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	960000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1372000	USD
CY2017Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	390000	USD
CY2017Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	331000	USD
CY2017Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	38811000	USD
CY2016Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	127334000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1329000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1586000	USD
CY2016Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	265000	USD
CY2017Q4	asrv	Investment Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value InvestmentSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	44406000	USD
CY2017Q4	asrv	Investment Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses Accumulated In Aoci InvestmentSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInAOCI	1231000	USD
CY2017Q4	asrv	Investment Securities Continuous Unrealized Loss Position Fair Value InvestmentSecuritiesContinuousUnrealizedLossPositionFairValue	102892000	USD
CY2017Q4	asrv	Investment Securities Continuous Unrealized Loss Position Aggregate Losses Accumulated In Aoci InvestmentSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInAOCI	1703000	USD
CY2016Q4	asrv	Investment Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value InvestmentSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	83997000	USD
CY2016Q4	asrv	Investment Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses Accumulated In Aoci InvestmentSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInAOCI	1797000	USD
CY2016Q4	asrv	Investment Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value InvestmentSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	8338000	USD
CY2016Q4	asrv	Investment Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses Accumulated In Aoci InvestmentSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInAOCI	299000	USD
CY2016Q4	asrv	Real Estate Construction Loans Percentage RealEstateConstructionLoansPercentage	0.047	pure
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	928000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	410000	USD
CY2017	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	800000	USD
CY2014Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9623000	USD
CY2017Q4	us-gaap	Other Real Estate OtherRealEstate	18000	USD
CY2016Q4	us-gaap	Other Real Estate OtherRealEstate	21000	USD
CY2017Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	74000	USD
CY2016	us-gaap	Loans And Leases Receivable Impaired Troubled Debt Interest Income LoansAndLeasesReceivableImpairedTroubledDebtInterestIncome	118000	USD
CY2016	asrv	Interest Income Recorded Nonaccrual Loans InterestIncomeRecordedNonaccrualLoans	0	USD
CY2016	asrv	Net Reduction In Interest Income NetReductionInInterestIncome	118000	USD
CY2017	us-gaap	Loans And Leases Receivable Impaired Troubled Debt Interest Income LoansAndLeasesReceivableImpairedTroubledDebtInterestIncome	103000	USD
CY2015	us-gaap	Loans And Leases Receivable Impaired Troubled Debt Interest Income LoansAndLeasesReceivableImpairedTroubledDebtInterestIncome	94000	USD
CY2017	asrv	Interest Income Recorded Nonaccrual Loans InterestIncomeRecordedNonaccrualLoans	-75000	USD
CY2016Q4	asrv	Investment Securities Continuous Unrealized Loss Position Aggregate Losses Accumulated In Aoci InvestmentSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInAOCI	2096000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	889633000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	883764000	USD
CY2017Q4	asrv	Real Estate Construction Loans Percentage RealEstateConstructionLoansPercentage	0.041	pure
CY2015	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1361000	USD
CY2015	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	409000	USD
CY2015	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	1250000	USD
CY2015Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9921000	USD
CY2016	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	4296000	USD
CY2016	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	357000	USD
CY2016	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	3950000	USD
CY2017Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	1759000	USD
CY2017Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	887874000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	909000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	9305000	USD
CY2016Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	674000	USD
CY2016Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	883090000	USD
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	527000	USD
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	9405000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	1815000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	1759000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	726000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	674000	USD
CY2016	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	1074000	USD
CY2016	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	22000	USD
CY2015	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	2146000	USD
CY2017	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	1913000	USD
CY2017	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	62000	USD
CY2015	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	27000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	879558000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	10075000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2016Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	879366000	USD
CY2016Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	4398000	USD
CY2016Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	3016000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	1603000	USD
CY2015	asrv	Interest Income Recorded Nonaccrual Loans InterestIncomeRecordedNonaccrualLoans	0	USD
CY2017	asrv	Net Reduction In Interest Income NetReductionInInterestIncome	28000	USD
CY2015	asrv	Net Reduction In Interest Income NetReductionInInterestIncome	94000	USD
CY2017Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	92000	USD
CY2017Q4	us-gaap	Receivables Fair Value Disclosure ReceivablesFairValueDisclosure	850000	USD
CY2016Q4	us-gaap	Receivables Fair Value Disclosure ReceivablesFairValueDisclosure	147000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	6800000	USD
CY2017Q4	asrv	Deposits With No Stated Maturities DepositsWithNoStatedMaturities	688648000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	909000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	527000	USD
CY2017Q4	asrv	Deposits With Stated Maturities DepositsWithStatedMaturities	259297000	USD
CY2017Q4	us-gaap	Other Borrowings OtherBorrowings	66617000	USD
CY2017Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	1754000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	34188000	USD
CY2017Q4	asrv	Regulatory Assets Fair Value Disclosure RegulatoryAssetsFairValueDisclosure	6800000	USD
CY2017Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	3173000	USD
CY2017Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	873784000	USD
CY2017Q4	us-gaap	Accounts Receivable Fair Value Disclosure AccountsReceivableFairValueDisclosure	3603000	USD
CY2017Q4	us-gaap	Cash Surrender Value Fair Value Disclosure CashSurrenderValueFairValueDisclosure	37860000	USD
CY2017Q4	asrv	Deposits With No Stated Maturities Fair Value Disclosure DepositsWithNoStatedMaturitiesFairValueDisclosure	688648000	USD
CY2017Q4	asrv	Deposits With Stated Maturities Fair Value Disclosure DepositsWithStatedMaturitiesFairValueDisclosure	260153000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Borrowings Fair Value Disclosure FederalHomeLoanBankBorrowingsFairValueDisclosure	49084000	USD
CY2017Q4	asrv	Debt And Capital Lease Obligations Fair Value Disclosure DebtAndCapitalLeaseObligationsFairValueDisclosure	69684000	USD
CY2017Q4	us-gaap	Accounts Payable And Accrued Liabilities Fair Value Disclosure AccountsPayableAndAccruedLiabilitiesFairValueDisclosure	1754000	USD
CY2017Q4	asrv	Available For Sale Securities Fair Values Disclosure AvailableForSaleSecuritiesFairValuesDisclosure	129138000	USD
CY2017Q4	us-gaap	Credit Risk Derivative Assets At Fair Value CreditRiskDerivativeAssetsAtFairValue	92000	USD
CY2017Q4	us-gaap	Credit Risk Derivative Liabilities At Fair Value CreditRiskDerivativeLiabilitiesAtFairValue	92000	USD
CY2017Q4	us-gaap	Derivative Assets DerivativeAssets	92000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	5484000	USD
CY2016Q4	asrv	Deposits With No Stated Maturities DepositsWithNoStatedMaturities	708062000	USD
CY2016Q4	asrv	Deposits With Stated Maturities DepositsWithStatedMaturities	259724000	USD
CY2016Q4	us-gaap	Other Borrowings OtherBorrowings	65891000	USD
CY2016Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	1640000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	34073000	USD
CY2016Q4	asrv	Regulatory Assets Fair Value Disclosure RegulatoryAssetsFairValueDisclosure	5484000	USD
CY2016Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	3158000	USD
CY2016Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	869960000	USD
CY2016Q4	us-gaap	Accounts Receivable Fair Value Disclosure AccountsReceivableFairValueDisclosure	3116000	USD
CY2016Q4	us-gaap	Cash Surrender Value Fair Value Disclosure CashSurrenderValueFairValueDisclosure	37903000	USD
CY2016Q4	asrv	Deposits With No Stated Maturities Fair Value Disclosure DepositsWithNoStatedMaturitiesFairValueDisclosure	708062000	USD
CY2016Q4	asrv	Deposits With Stated Maturities Fair Value Disclosure DepositsWithStatedMaturitiesFairValueDisclosure	261446000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Borrowings Fair Value Disclosure FederalHomeLoanBankBorrowingsFairValueDisclosure	12754000	USD
CY2016Q4	asrv	Debt And Capital Lease Obligations Fair Value Disclosure DebtAndCapitalLeaseObligationsFairValueDisclosure	69348000	USD
CY2016Q4	us-gaap	Accounts Payable And Accrued Liabilities Fair Value Disclosure AccountsPayableAndAccruedLiabilitiesFairValueDisclosure	1640000	USD
CY2016Q4	asrv	Available For Sale Securities Fair Values Disclosure AvailableForSaleSecuritiesFairValuesDisclosure	127077000	USD
CY2011Q3	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	21000	shares
CY2011Q3	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	21000000	USD
CY2016Q1	asrv	Preferred Stock Redemption Price Percentage PreferredStockRedemptionPricePercentage	1	pure
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-7555000	USD
CY2017	asrv	Other Comprehensive Income Loss Before Reclassifications OtherComprehensiveIncomeLossBeforeReclassifications	1044000	USD
CY2016	asrv	Other Comprehensive Income Loss Before Reclassifications OtherComprehensiveIncomeLossBeforeReclassifications	-4425000	USD
CY2017	asrv	Amounts Reclassified From Accumulated Other Comprehensive Income Loss AmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLoss	-286000	USD
CY2016	asrv	Amounts Reclassified From Accumulated Other Comprehensive Income Loss AmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLoss	403000	USD
CY2017	asrv	Net Current Period Other Comprehensive Loss NetCurrentPeriodOtherComprehensiveLoss	-1373000	USD
CY2016	asrv	Net Current Period Other Comprehensive Loss NetCurrentPeriodOtherComprehensiveLoss	-4022000	USD
CY2017	us-gaap	Proceeds From Fees Received ProceedsFromFeesReceived	139000	USD
CY2017Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	0	USD
CY2017	us-gaap	Increase Decrease In Fair Value Of Interest Rate Fair Value Hedging Instruments1 IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1	0	USD
CY2017	asrv	Derivative Instruments Weighted Average Interest Rate Received Paid DerivativeInstrumentsWeightedAverageInterestRateReceivedPaid	0	pure
CY2017Q4	asrv	Derivative Notional Amount Outstanding DerivativeNotionalAmountOutstanding	500000000	USD
CY2017Q4	us-gaap	Tangible Capital To Tangible Assets TangibleCapitalToTangibleAssets	0.0720	pure
CY2017Q4	us-gaap	Capital Capital	110681000	USD
CY2017Q4	asrv	Tieroneriskbasedcommonequity Tieroneriskbasedcommonequity	99552000	USD
CY2017Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	99552000	USD
CY2017Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	99552000	USD
CY2017Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1164	pure
CY2017Q4	asrv	Tieroneriskbasedcommonequitytoriskweightedassets Tieroneriskbasedcommonequitytoriskweightedassets	0.1047	pure
CY2017Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1047	pure
CY2017Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0875	pure
CY2017Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.08	pure
CY2017Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.08	pure
CY2016Q4	us-gaap	Capital Capital	107618000	USD
CY2016Q4	asrv	Tieroneriskbasedcommonequity Tieroneriskbasedcommonequity	96796000	USD
CY2016Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	96796000	USD
CY2016Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	96796000	USD
CY2016Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1135	pure
CY2016Q4	asrv	Tieroneriskbasedcommonequitytoriskweightedassets Tieroneriskbasedcommonequitytoriskweightedassets	0.1021	pure
CY2016Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1021	pure
CY2016Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0861	pure
CY2016Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.08	pure
CY2016Q4	asrv	Tier One Risk Based Common Equity Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCommonEquityRequiredForCapitalAdequacyToRiskWeightedAssets	0.045	pure
CY2016Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.06	pure
CY2016Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.04	pure
CY2016Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.1	pure
CY2016Q4	asrv	Tieroneriskbasedcommonequityrequiredfortobewellcapitalizedtoriskweightedassets Tieroneriskbasedcommonequityrequiredfortobewellcapitalizedtoriskweightedassets	0.065	pure
CY2016Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.08	pure
CY2016Q4	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized To Average Assets TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets	0.05	pure
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	30000000	shares
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	30000000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	26585403	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	26521291	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	18128247	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	18903472	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	8457156	shares
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	7617819	shares
CY2017	asrv	Interest And Fee Income Loans And Leases Taxable InterestAndFeeIncomeLoansAndLeasesTaxable	39122000	USD
CY2016	asrv	Interest And Fee Income Loans And Leases Taxable InterestAndFeeIncomeLoansAndLeasesTaxable	37786000	USD
CY2015	asrv	Interest And Fee Income Loans And Leases Taxable InterestAndFeeIncomeLoansAndLeasesTaxable	37923000	USD
CY2017	asrv	Interest And Fee Income Loans And Leases Tax Exempt InterestAndFeeIncomeLoansAndLeasesTaxExempt	95000	USD
CY2016	asrv	Interest And Fee Income Loans And Leases Tax Exempt InterestAndFeeIncomeLoansAndLeasesTaxExempt	75000	USD
CY2015	asrv	Interest And Fee Income Loans And Leases Tax Exempt InterestAndFeeIncomeLoansAndLeasesTaxExempt	72000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	118973000	USD
CY2017	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	839337	shares
CY2017	us-gaap	Depreciation Depreciation	1700000	USD
CY2016	us-gaap	Depreciation Depreciation	1800000	USD
CY2015	us-gaap	Depreciation Depreciation	1800000	USD
CY2017Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	11370000	USD
CY2017Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	11187000	USD
CY2017Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	11051000	USD
CY2017Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10748000	USD
CY2017Q4	us-gaap	Interest Expense InterestExpense	2366000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	2250000	USD
CY2017Q2	us-gaap	Interest Expense InterestExpense	2152000	USD
CY2017Q1	us-gaap	Interest Expense InterestExpense	2027000	USD
CY2017Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9004000	USD
CY2017Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8937000	USD
CY2017Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8899000	USD
CY2017Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8721000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	554000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	578000	USD
CY2017Q4	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	50000	USD
CY2017Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	200000	USD
CY2017Q2	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	325000	USD
CY2017Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	225000	USD
CY2017Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8954000	USD
CY2017Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8737000	USD
CY2017Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8574000	USD
CY2017Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8496000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	23356000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	22831000	USD
CY2017Q4	us-gaap	Noninterest Income NoninterestIncome	3699000	USD
CY2017Q3	us-gaap	Noninterest Income NoninterestIncome	3629000	USD
CY2017Q2	us-gaap	Noninterest Income NoninterestIncome	3755000	USD
CY2017Q1	us-gaap	Noninterest Income NoninterestIncome	3562000	USD
CY2017Q4	us-gaap	Noninterest Expense NoninterestExpense	10250000	USD
CY2017Q3	us-gaap	Noninterest Expense NoninterestExpense	10114000	USD
CY2017Q2	us-gaap	Noninterest Expense NoninterestExpense	10317000	USD
CY2017Q1	us-gaap	Noninterest Expense NoninterestExpense	10085000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	36090000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	34525000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2403000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2252000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2012000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1973000	USD
CY2017Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3398000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	701000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	623000	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	625000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	-995000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	1551000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	1389000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	1348000	USD
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.05
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.08
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.05
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.08
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.07
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.07
CY2017Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.015
CY2017Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.015
CY2017Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.015
CY2017Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.015
CY2016Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10582000	USD
CY2016Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10476000	USD
CY2016Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10389000	USD
CY2016Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10422000	USD
CY2016Q4	us-gaap	Interest Expense InterestExpense	1998000	USD
CY2016Q3	us-gaap	Interest Expense InterestExpense	1970000	USD
CY2016Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.015
CY2016Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.015
CY2016Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-549000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	1150000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	1065000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	1362000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	-1267000	USD
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.06
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.06
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.07
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.07
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.07
CY2016Q2	us-gaap	Interest Expense InterestExpense	1903000	USD
CY2016Q1	us-gaap	Interest Expense InterestExpense	1864000	USD
CY2016Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8584000	USD
CY2016Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8506000	USD
CY2016Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8486000	USD
CY2016Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8558000	USD
CY2016Q4	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	300000	USD
CY2016Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	300000	USD
CY2016Q2	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	250000	USD
CY2016Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	3100000	USD
CY2016Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8284000	USD
CY2016Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8206000	USD
CY2016Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8236000	USD
CY2016Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	5458000	USD
CY2016Q4	us-gaap	Noninterest Income NoninterestIncome	3798000	USD
CY2016Q3	us-gaap	Noninterest Income NoninterestIncome	3661000	USD
CY2016Q2	us-gaap	Noninterest Income NoninterestIncome	3742000	USD
CY2016Q1	us-gaap	Noninterest Income NoninterestIncome	3437000	USD
CY2016Q4	us-gaap	Noninterest Expense NoninterestExpense	10509000	USD
CY2016Q3	us-gaap	Noninterest Expense NoninterestExpense	10356000	USD
CY2016Q2	us-gaap	Noninterest Expense NoninterestExpense	10039000	USD
CY2016Q1	us-gaap	Noninterest Expense NoninterestExpense	10711000	USD
CY2016Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1573000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1511000	USD
CY2016Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1939000	USD
CY2016Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-1816000	USD
CY2016Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	423000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	446000	USD
CY2016Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	577000	USD
CY2016Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.010
CY2016Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.010
CY2017Q4	us-gaap	Loans And Leases Receivable Ratio Of Nonperforming Loans To All Loans LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans	0.0034	pure
CY2016Q4	us-gaap	Loans And Leases Receivable Ratio Of Nonperforming Loans To All Loans LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans	0.0018	pure
CY2017Q4	asrv	Nonperforming Assets Including Trouble Debt Restructurings NonperformingAssetsIncludingTroubleDebtRestructurings	3034000	USD
CY2016Q4	asrv	Nonperforming Assets Including Trouble Debt Restructurings NonperformingAssetsIncludingTroubleDebtRestructurings	1624000	USD
CY2017Q4	asrv	Troubled Debt Restructuring Modifications Recorded Investment TroubledDebtRestructuringModificationsRecordedInvestment	0	USD
CY2016Q4	asrv	Troubled Debt Restructuring Modifications Recorded Investment TroubledDebtRestructuringModificationsRecordedInvestment	0	USD
CY2017Q4	us-gaap	Dividend Payments Restrictions Schedule Statutory Capital And Surplus1 DividendPaymentsRestrictionsScheduleStatutoryCapitalAndSurplus1	110300000	USD
CY2017	asrv	Timely Payments On Contract Terms For Minimum Consecutive Months Prior To Consideration For Removing Loan From Tdr Status TimelyPaymentsOnContractTermsForMinimumConsecutiveMonthsPriorToConsiderationForRemovingLoanFromTdrStatus	P6Y
CY2017	asrv	Minimum Number Of Consecutive Months Payment For Removing Loan From Nonaccrual Status MinimumNumberOfConsecutiveMonthsPaymentForRemovingLoanFromNonaccrualStatus	P6M
CY2017	asrv	Aggregate Of Multiple Consecutive Maturity Date Extensions Delay In Payment Days AggregateOfMultipleConsecutiveMaturityDateExtensionsDelayInPaymentDays	P120D
CY2016Q4	us-gaap	Tangible Capital To Tangible Assets TangibleCapitalToTangibleAssets	0.0731	pure
CY2017Q4	asrv	Borrowers Aggregate Exposure For Loan Modification Minimum BorrowersAggregateExposureForLoanModificationMinimum	250000	USD
CY2017Q4	asrv	Allowance For Loan And Lease Losses Troubled Debt Restructurings AllowanceForLoanAndLeaseLossesTroubledDebtRestructurings	748000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	11786000	USD
CY2017Q4	asrv	Available For Sale Securities Debt Maturities Yield After One Through Five Years AvailableForSaleSecuritiesDebtMaturitiesYieldAfterOneThroughFiveYears	0.0293	pure
CY2017Q4	asrv	Heldtomaturity Securities Debt Maturities After Ten Through Fifteen Years Net Carrying Amount HeldtomaturitySecuritiesDebtMaturitiesAfterTenThroughFifteenYearsNetCarryingAmount	14247000	USD
CY2017Q4	asrv	Held To Maturity Securities Debt Maturities Yield After Ten Through Fifteen Years HeldToMaturitySecuritiesDebtMaturitiesYieldAfterTenThroughFifteenYears	0.0358	pure
CY2016Q4	asrv	Allowance For Loan And Lease Losses Troubled Debt Restructurings AllowanceForLoanAndLeaseLossesTroubledDebtRestructurings	527000	USD
CY2015Q4	us-gaap	Assets Assets	1148497000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	3200000	USD
CY2017	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	518000	USD
CY2017	asrv	Allowance For Loan And Lease Losses Write Off Percentage AllowanceForLoanAndLeaseLossesWriteOffPercentage	0.0006	pure
CY2016	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	3900000	USD
CY2016	asrv	Allowance For Loan And Lease Losses Write Off Percentage AllowanceForLoanAndLeaseLossesWriteOffPercentage	0.0044	pure
CY2017Q4	asrv	Individual Loan Balance Is Classified As Nonaccrual Status Or Troubled Debt Restructure IndividualLoanBalanceIsClassifiedAsNonaccrualStatusOrTroubledDebtRestructure	100000	USD
CY2017	us-gaap	Reclassification From Aoci Current Period Tax ReclassificationFromAociCurrentPeriodTax	-2131000	USD
CY2016	us-gaap	Reclassification From Aoci Current Period Tax ReclassificationFromAociCurrentPeriodTax	0	USD
CY2017	asrv	Debt Instrument Non Performing Assets DebtInstrumentNonPerformingAssets	3000000	USD
CY2017	asrv	Percentage For Total Loans PercentageForTotalLoans	0.0034	pure
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	401000	USD
CY2017Q4	asrv	Available For Sale Securities Debt Maturities Yield With In One Year AvailableForSaleSecuritiesDebtMaturitiesYieldWithInOneYear	0.0104	pure
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	48499000	USD
CY2017Q4	asrv	Availableforsale Securities Debt Maturities After Ten Through Fifteen Years Amortized Cost Basis AvailableforsaleSecuritiesDebtMaturitiesAfterTenThroughFifteenYearsAmortizedCostBasis	26016000	USD
CY2017Q4	asrv	Availableforsale Securities Debt Maturities After Fifteen Years Amortized Cost AvailableforsaleSecuritiesDebtMaturitiesAfterFifteenYearsAmortizedCost	42848000	USD
CY2017Q4	asrv	Available For Sale Securities Debt Maturities Yield After Five Through Ten Years AvailableForSaleSecuritiesDebtMaturitiesYieldAfterFiveThroughTenYears	0.0336	pure
CY2017Q4	asrv	Available For Sale Securities Deb Tmaturities Yield After Ten Through Fifteen Years AvailableForSaleSecuritiesDebTmaturitiesYieldAfterTenThroughFifteenYears	0.0239	pure
CY2017Q4	asrv	Available For Sale Securities Debt Maturities Yield After Fifteen Years AvailableForSaleSecuritiesDebtMaturitiesYieldAfterFifteenYears	0.0253	pure
CY2017Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	129550000	USD
CY2017Q4	asrv	Available For Sale Securities Debt Maturities Yield AvailableForSaleSecuritiesDebtMaturitiesYield	0.0284	pure
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	400000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	11767000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	48556000	USD
CY2017Q4	asrv	Availableforsale Securities Debt Maturities After Ten Through Fifteen Years Fair Value AvailableforsaleSecuritiesDebtMaturitiesAfterTenThroughFifteenYearsFairValue	25720000	USD
CY2017Q4	asrv	Availableforsale Securities Debt Maturities After Fifteen Years Fair Value AvailableforsaleSecuritiesDebtMaturitiesAfterFifteenYearsFairValue	42695000	USD
CY2017	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-76000	USD
CY2016	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-117000	USD
CY2017	asrv	Total Reclassifications For The Period TotalReclassificationsForThePeriod	-286000	USD
CY2016	asrv	Total Reclassifications For The Period TotalReclassificationsForThePeriod	403000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	108000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-268000	USD
CY2017Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	2000000	USD
CY2017Q4	asrv	Held To Maturity Securities Debt Maturities Yield Within One Year HeldToMaturitySecuritiesDebtMaturitiesYieldWithinOneYear	0.0178	pure
CY2017Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	2439000	USD
CY2017Q4	asrv	Held To Maturity Securities Debt Maturities Yield After One Through Five Years HeldToMaturitySecuritiesDebtMaturitiesYieldAfterOneThroughFiveYears	0.0224	pure
CY2017Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	14878000	USD
CY2017Q4	asrv	Held To Maturity Securities Debt Maturities Yield After Five Through Ten Years HeldToMaturitySecuritiesDebtMaturitiesYieldAfterFiveThroughTenYears	0.0342	pure
CY2017Q4	asrv	Heldtomaturity Securities Debt Maturities After Fifteen Years Net Carrying Amount HeldtomaturitySecuritiesDebtMaturitiesAfterFifteenYearsNetCarryingAmount	5188000	USD
CY2017Q4	asrv	Held To Maturity Securities Debt Maturities Yield After Fifteen Years HeldToMaturitySecuritiesDebtMaturitiesYieldAfterFifteenYears	0.0334	pure
CY2017Q4	asrv	Held To Maturity Securities Debt Maturities Yield HeldToMaturitySecuritiesDebtMaturitiesYield	0.0331	pure
CY2017Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	1976000	USD
CY2017Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	2411000	USD
CY2017Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	14890000	USD
CY2017Q4	asrv	Heldtomaturity Securities Debt Maturities After Ten Through Fifteen Years Fair Value HeldtomaturitySecuritiesDebtMaturitiesAfterTenThroughFifteenYearsFairValue	14282000	USD
CY2017Q4	asrv	Heldtomaturity Securities Debt Maturities After Fifteen Years Fair Value HeldtomaturitySecuritiesDebtMaturitiesAfterFifteenYearsFairValue	5252000	USD
CY2017Q4	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	183603000	USD
CY2016Q4	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	188808000	USD
CY2017Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	170343000	USD
CY2016Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	163801000	USD
CY2017Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	96583000	USD
CY2016Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	96475000	USD
CY2017Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	238119000	USD
CY2016Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	258978000	USD
CY2017Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	30297000	USD
CY2016Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	27427000	USD
CY2017Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	229000000	USD
CY2016Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	232297000	USD
CY2017	us-gaap	Interest Expense Domestic Deposit Liabilities Demand InterestExpenseDomesticDepositLiabilitiesDemand	638000	USD
CY2016	us-gaap	Interest Expense Domestic Deposit Liabilities Demand InterestExpenseDomesticDepositLiabilitiesDemand	317000	USD
CY2015	us-gaap	Interest Expense Domestic Deposit Liabilities Demand InterestExpenseDomesticDepositLiabilitiesDemand	199000	USD
CY2017	us-gaap	Interest Expense Domestic Deposit Liabilities Savings InterestExpenseDomesticDepositLiabilitiesSavings	162000	USD
CY2016	us-gaap	Interest Expense Domestic Deposit Liabilities Savings InterestExpenseDomesticDepositLiabilitiesSavings	159000	USD
CY2015	us-gaap	Interest Expense Domestic Deposit Liabilities Savings InterestExpenseDomesticDepositLiabilitiesSavings	156000	USD
CY2017	us-gaap	Interest Expense Domestic Deposit Liabilities Money Market InterestExpenseDomesticDepositLiabilitiesMoneyMarket	1446000	USD
CY2016	us-gaap	Interest Expense Domestic Deposit Liabilities Money Market InterestExpenseDomesticDepositLiabilitiesMoneyMarket	1198000	USD
CY2015	us-gaap	Interest Expense Domestic Deposit Liabilities Money Market InterestExpenseDomesticDepositLiabilitiesMoneyMarket	817000	USD
CY2017	asrv	Interest Expense Domestic Deposit Liabilities Time Deposits One Hundred Thousand Dollars Or More InterestExpenseDomesticDepositLiabilitiesTimeDepositsOneHundredThousandDollarsOrMore	319000	USD
CY2016	asrv	Interest Expense Domestic Deposit Liabilities Time Deposits One Hundred Thousand Dollars Or More InterestExpenseDomesticDepositLiabilitiesTimeDepositsOneHundredThousandDollarsOrMore	283000	USD
CY2015	asrv	Interest Expense Domestic Deposit Liabilities Time Deposits One Hundred Thousand Dollars Or More InterestExpenseDomesticDepositLiabilitiesTimeDepositsOneHundredThousandDollarsOrMore	266000	USD
CY2017	us-gaap	Interest Expense Domestic Deposit Liabilities Other Time Deposit InterestExpenseDomesticDepositLiabilitiesOtherTimeDeposit	3690000	USD
CY2016	us-gaap	Interest Expense Domestic Deposit Liabilities Other Time Deposit InterestExpenseDomesticDepositLiabilitiesOtherTimeDeposit	3443000	USD
CY2015	us-gaap	Interest Expense Domestic Deposit Liabilities Other Time Deposit InterestExpenseDomesticDepositLiabilitiesOtherTimeDeposit	3314000	USD
CY2017Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	102529000	USD
CY2017Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	47133000	USD
CY2017Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	38932000	USD
CY2017Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	9532000	USD
CY2017Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	18796000	USD
CY2017Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	12078000	USD
CY2017Q4	us-gaap	Time Deposits TimeDeposits	229000000	USD
CY2017Q4	asrv	Contractual Maturities Of Time Deposits One Hundred Thousand Dollars Or More Next Twelve Months ContractualMaturitiesOfTimeDepositsOneHundredThousandDollarsOrMoreNextTwelveMonths	24194000	USD
CY2017Q4	asrv	Contractual Maturities Of Time Deposits One Hundred Thousand Dollars Or More Year Two ContractualMaturitiesOfTimeDepositsOneHundredThousandDollarsOrMoreYearTwo	2295000	USD
CY2017Q4	asrv	Contractual Maturities Of Time Deposits One Hundred Thousand Dollars Or More Year Three ContractualMaturitiesOfTimeDepositsOneHundredThousandDollarsOrMoreYearThree	3707000	USD
CY2017Q4	asrv	Contractual Maturities Of Time Deposits One Hundred Thousand Dollars Or More Year Four ContractualMaturitiesOfTimeDepositsOneHundredThousandDollarsOrMoreYearFour	0	USD
CY2017Q4	asrv	Contractual Maturities Of Time Deposits One Hundred Thousand Dollars Or More Year Five ContractualMaturitiesOfTimeDepositsOneHundredThousandDollarsOrMoreYearFive	0	USD
CY2017Q4	asrv	Contractual Maturities Of Time Deposits One Hundred Thousand Dollars Or More After Year Five ContractualMaturitiesOfTimeDepositsOneHundredThousandDollarsOrMoreAfterYearFive	101000	USD
CY2017Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Or Less ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsOrLess	6649000	USD
CY2017Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Through Six Months ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsThroughSixMonths	9511000	USD
CY2017Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Six Months Through12 Months ContractualMaturitiesTimeDeposits100000OrMoreSixMonthsThrough12Months	8034000	USD
CY2017Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More After12 Months ContractualMaturitiesTimeDeposits100000OrMoreAfter12Months	6103000	USD
CY2017	asrv	Short Term Debt Instrument Weighted Average Term ShortTermDebtInstrumentWeightedAverageTerm	P3D
CY2016	asrv	Short Term Debt Instrument Weighted Average Term ShortTermDebtInstrumentWeightedAverageTerm	P3D
CY2015	asrv	Short Term Debt Instrument Weighted Average Term ShortTermDebtInstrumentWeightedAverageTerm	P3D
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-210000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	520000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-318000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	788000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Interest Rate FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate	0.0137	pure
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate After Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate	0.0160	pure
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Four To Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate	0.0159	pure
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Three To Four Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate	0.0151	pure
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0.0148	pure
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate One To Two Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate	0.0106	pure
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	12000000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	12000000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	12500000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	8042000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	1000000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0.0148	pure
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Three To Four Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate	0.0151	pure
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Four To Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate	0.0174	pure
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate After Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate	0.0175	pure
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Interest Rate FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate	0.0161	pure
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	5000000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	16729000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	12500000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	12000000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	371000000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Maximum Amount Available FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable	35000000	USD
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	417566	shares
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	470449	shares
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	559909	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	2.76
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	2.74
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	2.66
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	3.96
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	3.03
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	2.96
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	17500	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	54000	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	32500	shares
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	64112	shares
CY2016	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	32661	shares
CY2015	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	75923	shares
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	2.49
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	2.27
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	2.07
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	3.10
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	3.04
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	3.04
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	10233	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	74222	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	46037	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	360721	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	2.85
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	2.79
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	2.69
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	2.58
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	308301	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	328062	shares
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	336555	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	1.12
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	0.93
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	0.67
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0197	pure
CY2015	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P10Y
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.22	pure
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	483000	USD
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0135	pure
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P10Y
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P10Y
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.29	pure
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0150	pure
CY2017	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	13000	USD
CY2016	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	20000	USD
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CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	800000	shares
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Purchase Price Of Common Stock Percent SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent	1	pure
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod	P10Y
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CY2017Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	360721	shares
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CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	277000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	254000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	254000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	256000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	1558000	USD
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CY2016Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease	0.0250	pure
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1044000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1455000	USD
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CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	414000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	888000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	2624000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	2938000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1090000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	2836000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	283000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	255000	USD
CY2015	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	574000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	68000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	62000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	81000	USD
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.619	pure
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.280	pure
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.281	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.008	pure
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.019	pure
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.010	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.033	pure
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.079	pure
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.069	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.340	pure
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.340	pure
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.340	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.304	pure
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0	pure
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0	pure
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	2145000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	3377000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	192000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	303000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Trading Securities DeferredTaxAssetsUnrealizedLossesOnTradingSecurities	87000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Trading Securities DeferredTaxAssetsUnrealizedLossesOnTradingSecurities	87000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	804000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	1542000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	948000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	2582000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	1724000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	2110000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	219000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	895000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	6119000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	10896000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	33000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	24000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	123000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	217000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	156000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	241000	USD
CY2017	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-53000	USD
CY2016	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-507000	USD
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-4692000	USD
CY2016	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	1662000	USD
CY2017Q4	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	1700000	USD
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Amendment Flag AmendmentFlag	false
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2017	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2017	dei	Entity Registrant Name EntityRegistrantName	AMERISERV FINANCIAL INC /PA/
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0000707605
CY2017	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Smaller Reporting Company
CY2017Q2	dei	Entity Public Float EntityPublicFloat	69492588	USD
CY2017	dei	Trading Symbol TradingSymbol	ASRV
CY2018Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	18128247	shares
CY2017Q4	asrv	Defined Benefit Plan Minimum Number Of Annual Employee Hours DefinedBenefitPlanMinimumNumberOfAnnualEmployeeHours	1000	pure
CY2017Q4	asrv	Carrying Value Of Available For Sale Held To Maturity And Federal Home Loan Bank Borrowings CarryingValueOfAvailableForSaleHeldToMaturityAndFederalHomeLoanBankBorrowings	117181000	USD
CY2016Q4	asrv	Carrying Value Of Available For Sale Held To Maturity And Federal Home Loan Bank Borrowings CarryingValueOfAvailableForSaleHeldToMaturityAndFederalHomeLoanBankBorrowings	104953000	USD
CY2017	asrv	Gain On Sale Of Securities GainOnSaleOfSecurities	115000	USD
CY2016	asrv	Gain On Sale Of Securities GainOnSaleOfSecurities	183000	USD
CY2015	asrv	Gain On Sale Of Securities GainOnSaleOfSecurities	107000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	76000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	117000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	46000	USD
CY2017Q4	asrv	Defined Benefit Plan Maximum Percent Of Assets Comprised Of Entity Common Stock DefinedBenefitPlanMaximumPercentOfAssetsComprisedOfEntityCommonStock	0.1	pure
CY2017Q1	asrv	Consolidated Investment Securities Portfolio Modified Years ConsolidatedInvestmentSecuritiesPortfolioModifiedYears	P3Y8M8D
CY2016	asrv	Loss On Sale Of Securities LossOnSaleOfSecurities	-6000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	469000	USD
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	447000	USD
CY2015	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	433000	USD
CY2017Q4	asrv	Defined Contribution Plan Amount Of Entity Common Stock And Securities Held DefinedContributionPlanAmountOfEntityCommonStockAndSecuritiesHeld	1100000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	32889000	USD
CY2016	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	42844000	USD
CY2015	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	22241000	USD
CY2017	asrv	Increase Decrease In Short Term Debt Investing IncreaseDecreaseInShortTermDebtInvesting	502000	USD
CY2016	asrv	Increase Decrease In Short Term Debt Investing IncreaseDecreaseInShortTermDebtInvesting	875000	USD
CY2017Q4	asrv	Federal Home Loan Bank Stock Par Value FederalHomeLoanBankStockParValue	100
CY2017	us-gaap	Threshold Period Past Due For Writeoff Of Financing Receivable ThresholdPeriodPastDueForWriteoffOfFinancingReceivable	P90D
CY2017Q4	asrv	Financing Receivable Allowance For Credit Losses Threshold For Individually Evaluating Of Impairment FinancingReceivableAllowanceForCreditLossesThresholdForIndividuallyEvaluatingOfImpairment	250000	USD
CY2005	asrv	Loss On Sale Of Securities LossOnSaleOfSecurities	-36000	USD
CY2017Q4	us-gaap	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	133	pure
CY2013	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.02	pure
CY2013	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.01	pure
CY2016	asrv	Defined Contribution Plan Maximum Annual Contribution Per Union Employee Percent DefinedContributionPlanMaximumAnnualContributionPerUnionEmployeePercent	0.04	pure
CY2017	asrv	Defined Contribution Plan Maximum Annual Contribution Per Union Employee Percent DefinedContributionPlanMaximumAnnualContributionPerUnionEmployeePercent	0.04	pure
CY2014	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.06	pure
CY2014	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.03	pure
CY2015	asrv	Increase Decrease In Short Term Debt Investing IncreaseDecreaseInShortTermDebtInvesting	627000	USD
CY2017	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	2705000	USD
CY2016	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	1380000	USD
CY2015	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	881000	USD
CY2017	us-gaap	Payments For Repurchase Of Equity PaymentsForRepurchaseOfEquity	3404000	USD
CY2016	us-gaap	Payments For Repurchase Of Equity PaymentsForRepurchaseOfEquity	0	USD
CY2015	us-gaap	Payments For Repurchase Of Equity PaymentsForRepurchaseOfEquity	0	USD
CY2017	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
CY2015	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	7418000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Expected Amortization Of Gain Loss Next Fiscal Year DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear	1561000	USD
CY2017Q4	us-gaap	Number Of Stores NumberOfStores	15	pure
CY2017Q4	us-gaap	Assets Held In Trust AssetsHeldInTrust	2200000000	USD
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	10000	shares
CY2016	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	51273	shares
CY2015	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	58788	shares
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	1075000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	375000	USD
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	1554000	USD
CY2017	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	77000	USD
CY2016	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	172000	USD
CY2015	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	189000	USD
CY2017	us-gaap	Interest Paid InterestPaid	8681000	USD
CY2016	us-gaap	Interest Paid InterestPaid	7746000	USD
CY2015	us-gaap	Interest Paid InterestPaid	6575000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	5000	USD
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	6000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	571000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	767000	USD
CY2015	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	821000	USD
CY2017	asrv	Onetime Cumulative Effect Adjustment OnetimeCumulativeEffectAdjustment	2100000	USD
CY2017	us-gaap	Revenue Recognition Services Management Fees RevenueRecognitionServicesManagementFees	<div style="MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif "> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;PADDING-BOTTOM: 3pt; TEXT-TRANSFORM: none; TEXT-INDENT: 20px; MARGIN: 0pt; PADDING-LEFT: 4px; PADDING-RIGHT: 0pt; FONT: 10pt/12pt Times New Roman, Times, Serif; PADDING-TOP: 3pt" align="left"></div> <h5 style="TEXT-ALIGN: left; PADDING-BOTTOM: 3pt; TEXT-TRANSFORM: none; TEXT-INDENT: 0pt; MARGIN: 0pt; PADDING-LEFT: 24px; PADDING-RIGHT: 0pt; FONT: 10pt/12pt Times New Roman, Times, Serif; PADDING-TOP: 3pt"> TRUST FEES:</h5> <div style="CLEAR:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;PADDING-BOTTOM: 3pt; TEXT-TRANSFORM: none; TEXT-INDENT: 20px; MARGIN: 0pt; PADDING-LEFT: 4px; PADDING-RIGHT: 0pt; FONT: 10pt/12pt Times New Roman, Times, Serif; PADDING-TOP: 3pt" align="left">Trust fees are recorded on the cash basis which approximates the accrual basis for such income.</div> </div><table border="0" style="width:100%; table-layout:fixed;" cellspacing="0" cellpadding="0"><tr><td></td></tr></table>

Files In Submission

Name	View Source	Status
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0001144204-18-012402-index.html	Edgar Link	pending
0001144204-18-012402.txt	Edgar Link	pending
0001144204-18-012402-xbrl.zip	Edgar Link	pending
asrv-20171231.xml	Edgar Link	completed
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asrv-20171231_cal.xml	Edgar Link	unprocessable
asrv-20171231_def.xml	Edgar Link	unprocessable
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asrv-20171231_pre.xml	Edgar Link	unprocessable
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$ASRV
AMERISERV FINANCIAL INC /PA/ Stock $asrv

2016 Q4 Form 10-K Financial Statement

#000114420418012402 Filed on March 02, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ASRV AMERISERV FINANCIAL INC /PA/ Stock $asrv

2016 Q4 Form 10-K Financial Statement

#000114420418012402 Filed on March 02, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ASRV
AMERISERV FINANCIAL INC /PA/ Stock $asrv