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Pension Plans (Narrative) (Details) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 USD ($) plan | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) plan | Jun. 30, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Number of defined benefit plans | plan | 2 |  | 2 |
Net periodic pension cost (income) | $ 215,000 | $ 244,000 | $ 431,000 | $ 488,000
Pension Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net periodic pension cost (income) | 201,000 | $ 198,000 | 403,000 | $ 396,000
Contributions to plan |  |  | 0 |
Expected contributions to plan | $ 0 |  | $ 0 |

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