Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Schedule of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	$ 1,412,506	$ 1,322,377
Ending balance	1,414,067
Defined Benefit Pension
Schedule of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	(103,418)	(61,831)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	4,745	313
Income Tax (Expense) or Benefit	(1,040)	(71)
Other Comprehensive Income (Loss), Net of Tax, Total	3,705	242
Ending balance	(99,713)	(61,589)
Defined Benefit Post-Retirement
Schedule of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	36	(229)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	0	11
Income Tax (Expense) or Benefit	0	(2)
Other Comprehensive Income (Loss), Net of Tax, Total	0	9
Ending balance	36	(220)
Foreign Currency Translation
Schedule of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	(20)	(20)
Other Comprehensive Income (Loss), Net of Tax, Total	0	0
Ending balance	(20)	(20)
Total
Schedule of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	(103,402)	(62,080)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	4,745	324
Income Tax (Expense) or Benefit	(1,040)	(73)
Other Comprehensive Income (Loss), Net of Tax, Total	3,705	251
Ending balance	$ (99,697)	$ (61,829)