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Pension and Other Postretirement Benefit Plans Schedule of Expected Benefit Payments (Details)
$ in Thousands
Dec. 31, 2020
USD ($)
Compensation And Retirement Disclosure [Abstract]  
2021 $ 1,527
2022 1,618
2023 1,662
2024 1,785
2025 1,861
Succeeding five years $ 11,490