Other Noncurrent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other Liabilities Noncurrent [Abstract]
Uncertain Tax Positions (Includes Interest and Penalties)	$ 28,665	$ 28,961
Non-current income taxes payable	8,500	8,500
Deferred And Other Long-Term Compensation	6,388	6,257
Environmental reserves	4,424	4,610
Inactive subsidiary litigation and settlement reserve	410	542
Fair value of interst rate swaps	0	4,672
Other	1,228	1,627
Total other non-current liabilities	$ 49,615	$ 55,169