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Pension Benefits - Additional information (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Dec. 31, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Minimum number of annual hours | 1,000 |  | 1,000 |  |
Maximum percent of plan assets comprised of AmeriServ Financial, Inc. common stock | 10.00% |  | 10.00% |  |
Defined Benefit Pension Items |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Settlement charge | $ 1,014,000 | $ 851,000 | $ 1,014,000 | $ 851,000 |
Defined Benefit Pension Items | Other assets. |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Assets for pension benefits | $ 15,900,000 |  | $ 15,900,000 |  | $ 19,500,000

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