Condensed Financial Information of Registrant - Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating expenses
Depreciation and amortization	$ 94,241	$ 90,036	$ 86,121
Loss (gain) on sale of assets, net	(64,697)	0	0
General and administrative expense (excluding depreciation)	48,096	41,288	46,223
Acquisition and integration costs	87	614	4,704
Total operating expenses	4,717,708	3,442,868	5,253,536
Operating loss	(7,619)	(317,998)	147,980
Other income (expense)
Interest expense and financing costs, net	(66,493)	(70,222)	(74,839)
Debt extinguishment and commitment costs	(8,144)	0	(11,587)
Other income (expense), net	(52)	1,049	2,516
Change in value of common stock warrants	0	4,270	(3,199)
Equity in earnings (losses) from subsidiaries	0	(46,905)	(89,751)
Total other expense, net	(72,657)	(111,808)	(176,860)
Loss before income taxes	(80,276)	(429,806)	(28,880)
Income tax benefit (expense)	(1,021)	20,720	69,689
Net income (loss)	(81,297)	(409,086)	40,809
Parent Company
Operating expenses
Depreciation and amortization	2,452	2,900	2,969
Loss (gain) on sale of assets, net	15	0	0
General and administrative expense (excluding depreciation)	12,435	11,097	20,017
Acquisition and integration costs	87	0	28
Total operating expenses	14,989	13,997	23,014
Operating loss	(14,989)	(13,997)	(23,014)
Other income (expense)
Interest expense and financing costs, net	(2,600)	(4,982)	(9,952)
Debt extinguishment and commitment costs	0	0	(6,091)
Other income (expense), net	(33)	(3)	2,303
Change in value of common stock warrants	0	4,270	(3,199)
Equity in earnings (losses) from subsidiaries	(63,649)	(394,197)	81,097
Total other expense, net	(66,282)	(394,912)	64,158
Loss before income taxes	(81,271)	(408,909)	41,144
Income tax benefit (expense)	(26)	(177)	(335)
Net income (loss)	$ (81,297)	$ (409,086)	$ 40,809