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Employee Benefit Plans - Benefit Payments and Contributions (Details) $ in Thousands | Dec. 31, 2018 USD ($)
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Estimated Future Employer Contributions [Abstract] |
Estimated future employer contributions in next fiscal year | $ 5,400
Other Postretirement Benefit Plans, Defined Benefit [Member] |
Expected Future Benefit Payments by Fiscal Year [Abstract] |
2019 | 717
2020 | 705
2021 | 681
2022 | 663
2023 | 641
2024 - 2028 | 2,794
Nonqualified Plan [Member] | Supplemental Employee Retirement Plans, Defined Benefit [Member] |
Expected Future Benefit Payments by Fiscal Year [Abstract] |
2019 | 13,500
2020 | 5,353
2021 | 11,474
2022 | 8,742
2023 | 4,220
2024 - 2028 | 18,933
Domestic Plan [Member] | Qualified Plan [Member] | Pension Plan [Member] |
Expected Future Benefit Payments by Fiscal Year [Abstract] |
2019 | 33,990
2020 | 37,086
2021 | 37,217
2022 | 36,896
2023 | 36,117
2024 - 2028 | 166,962
Foreign Plan [Member] | Qualified Plan [Member] | Pension Plan [Member] |
Expected Future Benefit Payments by Fiscal Year [Abstract] |
2019 | 9,069
2020 | 8,484
2021 | 9,043
2022 | 9,339
2023 | 10,754
2024 - 2028 | $ 63,653

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