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Segment Results (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Contribution of segments to the consolidated results of operations |  |  |
Total revenue | $ 12,646 us-gaap_InterestRevenueExpenseNet | $ 12,057 us-gaap_InterestRevenueExpenseNet |
Net income | 1,369 us-gaap_NetIncomeLoss | 930 us-gaap_NetIncomeLoss |
Total assets | 1,103,416 us-gaap_Assets |  | 1,089,263 us-gaap_Assets
Retail Banking [Member] |  |  |
Contribution of segments to the consolidated results of operations |  |  |
Total revenue | 6,524 us-gaap_InterestRevenueExpenseNet / us-gaap_StatementBusinessSegmentsAxis = asrv_RetailBankingMember | 6,117 us-gaap_InterestRevenueExpenseNet / us-gaap_StatementBusinessSegmentsAxis = asrv_RetailBankingMember |
Net income | 659 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asrv_RetailBankingMember | 348 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asrv_RetailBankingMember |
Total assets | 374,490 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = asrv_RetailBankingMember |  | 376,009 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = asrv_RetailBankingMember
Commercial Banking [Member] |  |  |
Contribution of segments to the consolidated results of operations |  |  |
Total revenue | 4,738 us-gaap_InterestRevenueExpenseNet / us-gaap_StatementBusinessSegmentsAxis = asrv_CommercialBankingMember | 4,327 us-gaap_InterestRevenueExpenseNet / us-gaap_StatementBusinessSegmentsAxis = asrv_CommercialBankingMember |
Net income | 1,291 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asrv_CommercialBankingMember | 1,096 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asrv_CommercialBankingMember |
Total assets | 586,916 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = asrv_CommercialBankingMember |  | 563,690 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = asrv_CommercialBankingMember
Trust [Member] |  |  |
Contribution of segments to the consolidated results of operations |  |  |
Total revenue | 2,167 us-gaap_InterestRevenueExpenseNet / us-gaap_StatementBusinessSegmentsAxis = asrv_TrustMember | 2,114 us-gaap_InterestRevenueExpenseNet / us-gaap_StatementBusinessSegmentsAxis = asrv_TrustMember |
Net income | 380 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asrv_TrustMember | 308 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asrv_TrustMember |
Total assets | 5,125 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = asrv_TrustMember |  | 5,015 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = asrv_TrustMember
Investment/ Parent [Member] |  |  |
Contribution of segments to the consolidated results of operations |  |  |
Total revenue | (783)us-gaap_InterestRevenueExpenseNet / us-gaap_StatementBusinessSegmentsAxis = asrv_InvestmentOrParentMember | (501)us-gaap_InterestRevenueExpenseNet / us-gaap_StatementBusinessSegmentsAxis = asrv_InvestmentOrParentMember |
Net income | (961)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asrv_InvestmentOrParentMember | (822)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asrv_InvestmentOrParentMember |
Total assets | $ 136,885 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = asrv_InvestmentOrParentMember |  | $ 144,549 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = asrv_InvestmentOrParentMember

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