Other Noncurrent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other Liabilities Disclosure [Abstract]
Postretirement benefits other than pensions	$ 41,257	$ 44,317
Pension liabilities	30,850	35,607
Finance leases	14,515	16,121
Operating leases	11,001	13,589
Interest rate swap agreements	5,176	12,714
Deferred payroll taxes	0	2,593
Incentive and deferred compensation	3,257	2,286
Other	1,738	3,197
Total	$ 107,794	$ 130,424