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Pension Benefits, Other Postretirement Benefits and Employee Savings and Investment Plans (Estimated Future Payments) (Details) $ in Thousands | Dec. 31, 2020 USD ($)
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Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2021 | $ 1,808
2022 | 1,758
2023 | 1,778
2024 | 1,770
2025 | 1,801
2026-2030 | 8,570
Other Postretirement Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2021 | 148
2022 | 114
2023 | 130
2024 | 122
2025 | 150
2026-2030 | $ 763

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