Industry Segments - Corporate Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
General and administrative expense	$ 18,714	$ 16,123	$ 56,077	$ 60,333
Depreciation, amortization, and accretion	8,308	9,657	25,495	28,934
Interest expense, net	4,083	4,338	12,373	14,234
Warrants fair value adjustment			(143)	(326)
Other general corporate income, net	(6,968)	(788)	(14,295)	(1,308)
Total	(2,495)	9,559	16,102	19,746
Corporate Overhead
Segment Reporting Information [Line Items]
General and administrative expense	8,409	8,959	30,973	28,650
Depreciation, amortization, and accretion	228	270	646	643
Interest expense, net	4,247	4,706	13,354	14,909
Warrants fair value adjustment	(3,164)	0	(143)	(327)
Other general corporate income, net	69	(463)	(3,010)	(50)
Total	$ 9,789	$ 13,472	$ 41,820	$ 43,825