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Pensions and Other Postretirement Benefits (Estimated Future Benefit Payments) (Details) $ in Thousands | Dec. 31, 2018 USD ($)
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Pension Plans |
Defined Benefit Plan Disclosure [Line Items] |
2019 | $ 757
2020 | 572
2021 | 673
2022 | 662
2023 | 1,048
2024-2027 | 4,142
OPEB Plans |
Defined Benefit Plan Disclosure [Line Items] |
2019 | 272
2020 | 345
2021 | 434
2022 | 418
2023 | 336
2024-2027 | $ 1,704

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