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Pension Plans (Narrative) (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) plan | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) plan | Sep. 30, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Number of defined benefit plans | plan | 2 |  | 2 |
Net periodic pension cost (income) | $ 186,000 | $ 244,000 | $ 617,000 | $ 732,000
Pension Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net periodic pension cost (income) | 172,000 | $ 289,000 | 575,000 | $ 690,000
Contributions to plan |  |  | 0 |
Expected contributions to plan | $ 0 |  | $ 0 |

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