Segments - Reconciliation of Net Income to Gross Margin (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reconciliation Net Income (Loss) to Gross Margin
Total gross margin	$ 119,478		$ 131,383	$ 383,773	$ 374,559
Less:
Selling, general and administrative	18,681		29,526	78,052	87,133
Depreciation and amortization	47,279		48,409	145,950	137,997
Long-lived and other asset impairment	10,727		7,097	72,132	18,821
Goodwill impairment		$ 99,800	0	99,830	0
Restatement and other charges			0		445
Restructuring charges	2,900		0	7,036	0
Interest expense	25,221		27,401	80,664	76,972
Debt extinguishment loss			0	3,971	3,653
Transaction-related costs			4,905		7,772
Gain on sale of assets, net	(9,146)		(7,859)	(11,073)	(9,644)
Other (income) loss, net	(324)		49	(1,317)	(381)
Income (loss) before income taxes	$ 24,140		$ 21,855	$ (91,472)	$ 51,791