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Principles of Consolidation
 6 Months Ended
Jun. 30, 2018
Principles of Consolidation [Abstract]  
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
1.
Principles of Consolidation
 
 The accompanying consolidated financial statements include the accounts of AmeriServ Financial, Inc. (the Company) and its wholly-owned subsidiaries, AmeriServ Financial Bank (the Bank), AmeriServ Trust and Financial Services Company (the Trust Company), and AmeriServ Life Insurance Company (AmeriServ Life). The Bank is a Pennsylvania state-chartered full service bank with 15 locations in Pennsylvania. The Trust Company offers a complete range of trust and financial services and administers assets valued at $2.2 billion that are not reported on the 
Company’s Consolidated Balance Sheet at 
June 30, 2018. AmeriServ Life is a captive insurance company that engages in underwriting as a reinsurer of credit life and disability insurance.
 
In addition, the Parent Company is an administrative group that provides support in such areas as audit, finance, investments, loan review, general services, and marketing. Significant intercompany accounts and transactions have been eliminated in preparing the consolidated financial statements.