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Pension Benefits - Additional information (Details) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 USD ($) Y | Dec. 31, 2022 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |
Minimum number of annual hours | 1,000 |
Requisite service period | 5 years |
Number of consecutive calendar years | Y | 5 |
Period of employment | 10 years |
Maximum percent of plan assets comprised of AmeriServ Financial, Inc. common stock | 10.00% |
Defined Benefit Pension Items | Other assets. |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Assets for pension benefits | $ | $ 22.3 | $ 21.3

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