XML 86 R67.htm IDEA: XBRL DOCUMENT v3.20.4
Benefit Plans - Benefits Expected to be Paid in Next Five Years (Details)
$ in Thousands
Dec. 31, 2020
USD ($)
Pension Plan  
Expected Future Benefit Payments [Abstract]  
2021 $ 15,707
2022 15,097
2023 15,979
2024 16,023
2025 16,541
2026 - 2030 91,120
Other Postretirement Benefits Plan  
Expected Future Benefit Payments [Abstract]  
2021 1,441
2022 1,511
2023 1,596
2024 1,676
2025 1,671
2026 - 2030 8,857
Maximum  
Defined Benefit Plan Disclosure [Line Items]  
Estimated required and discretionary employer cash contributions $ 8,481