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Pension Plans (Narrative) (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) plan | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) plan | Sep. 30, 2020 USD ($)
Retirement Benefits [Abstract] |  |  |  |
Number of defined benefit plans | plan | 2 |  | 2 |
Net periodic pension cost (income) | $ 158,000 | $ 186,000 | $ 475,000 | $ 617,000
Contributions to plan |  |  | 0 |
Expected contributions to plan | $ 0 |  | $ 0 |

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