Additional Financial Information - Other Expenses, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Additional Financial Information
Loss on disposal of inventory	$ 8,607	$ 4,590	$ 280
Gain on insurance settlements	0	(3,509)	0
Loss on asset retirement obligations liability settlements	1,966	193	0
Restructuring charges	16,474	11,528	0
Other, net	10,755	11,846	(6,781)
Other expenses, net	$ 37,802	$ 24,648	$ (6,501)