Condensed Financial Information of Registrant - Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 364,189	$ (81,297)	$ (409,086)
Adjustments to reconcile net income (loss) to cash used in operating activities:
Depreciation and amortization	99,769	94,241	90,036
Non-cash interest expense	4,218	5,663	6,902
Change in value of common stock warrants	0	0	(4,270)
Loss (gain) on sale of assets, net	(169)	(64,697)	0
Stock-based compensation	9,353	8,165	7,342
Equity in losses (income) of subsidiaries	0	0	46,905
Net changes in operating assets and liabilities:
Prepaid and other assets	(35,356)	(6,321)	36,500
Accounts payable, other accrued liabilities, and operating lease ROU assets and liabilities	262,882	209,565	67,193
Net cash provided by (used in) operating activities	452,606	(27,622)	(37,214)
Cash flows from investing activities:
Capital expenditures	(53,025)	(29,533)	(63,522)
Net cash provided by (used in) investing activities	(87,308)	74,628	(63,464)
Cash flows from financing activities:
Proceeds from sale of common stock, net of offering costs	0	87,193	0
Proceeds from borrowings	384,874	186,773	250,387
Repayments of borrowings	(446,863)	(329,315)	(159,489)
Other financing activities, net	6,032	920	(5,538)
Net cash provided by (used in) financing activities	13,407	(1,094)	42,559
Net increase (decrease) in cash, cash equivalents, and restricted cash	378,705	45,912	(58,119)
Cash, cash equivalents, and restricted cash at beginning of period	116,221	70,309	128,428
Cash, cash equivalents, and restricted cash at end of period	494,926	116,221	70,309
Net cash received (paid) for:
Interest	63,323	65,221	54,256
Taxes	51	795	(190)
Non-cash investing and financing activities:
Accrued capital expenditures	5,418	8,177	4,686
ROU assets obtained in exchange for new finance lease liabilities	594	1,936	3,476
ROU assets obtained in exchange for new operating lease liabilities	64,567	97,011	22,529
Parent Company
Cash flows from operating activities:
Net income (loss)	364,189	(81,297)	(409,086)
Adjustments to reconcile net income (loss) to cash used in operating activities:
Depreciation and amortization	2,131	2,452	2,900
Non-cash interest expense	0	1,364	2,518
Change in value of common stock warrants	0	0	(4,270)
Loss (gain) on sale of assets, net	27	15	0
Stock-based compensation	9,353	8,165	7,342
Equity in losses (income) of subsidiaries	(388,008)	63,649	394,197
Net changes in operating assets and liabilities:
Prepaid and other assets	13,436	1,318	(4,253)
Accounts payable, other accrued liabilities, and operating lease ROU assets and liabilities	2,651	(1,380)	(187)
Net cash provided by (used in) operating activities	3,779	(5,714)	(10,839)
Cash flows from investing activities:
Investments in subsidiaries	0	(146,056)	0
Distributions from subsidiaries	0	90,183	4,113
Capital expenditures	(1,311)	(1,126)	(1,296)
Due to (from) subsidiaries	5,645	29,752	5,768
Proceeds from sale of assets	0	0	14
Net cash provided by (used in) investing activities	4,334	(27,247)	8,599
Cash flows from financing activities:
Proceeds from sale of common stock, net of offering costs	0	87,193	0
Proceeds from borrowings	0	12,364	14,437
Repayments of borrowings	(9,319)	(62,111)	(18,603)
Other financing activities, net	(332)	(879)	164
Net cash provided by (used in) financing activities	(9,651)	36,567	(4,002)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(1,538)	3,606	(6,242)
Cash, cash equivalents, and restricted cash at beginning of period	4,416	810	7,052
Cash, cash equivalents, and restricted cash at end of period	2,878	4,416	810
Net cash received (paid) for:
Interest	(3)	(1,230)	(2,475)
Taxes	(15)	27	(28)
Non-cash investing and financing activities:
Accrued capital expenditures	372	131	233
ROU assets obtained in exchange for new finance lease liabilities	0	0	173
ROU assets obtained in exchange for new operating lease liabilities	$ 0	$ 165	$ 0