Benefit Plans - Funded Status, Postretirement Benefits (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liabilities	$ (93,391)	$ (113,325)
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	(2,990)	(2,886)
Noncurrent liabilities	(62,166)	(64,779)
Total liability - pension plans	$ (65,156)	$ (67,665)