Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash Flows From Operating Activities:
Net (loss) income	$ (312,321)	$ 89,476	$ 44,788
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	150,546	160,557	160,955
Amortization of debt issuance costs and discounts	5,025	3,446	4,461
Loss on early extinguishment of debt and write-off of discounts and debt issuance costs			8,150
Deferred income tax (benefit) provision	(31,414)	37,998	16,894
Equity-based compensation	7,467	11,106	22,152
Other including loss on impairment or disposal of assets, net	6,046	4,616	19,681
Changes in assets and liabilities:
Accounts receivable	24,761	10,865	(24,347)
Inventories	2,267	721	(4,620)
Prepaid expenses and other current assets	5,210	(27,359)	(2,275)
Accounts payable and accrued expenses	1,640	2,733	13,317
Accrued salaries, wages and benefits	(4,718)	(5,467)	6,051
Deferred revenue	25,065	665	25,611
Other accrued liabilities	(422)	57,684	3,417
Right-of-use assets and operating lease liabilities	561	501
Other assets and liabilities	(442)	874	(300)
Net cash (used in) provided by operating activities	(120,729)	348,416	293,935
Cash Flows From Investing Activities:
Capital expenditures	(109,175)	(195,217)	(179,770)
Other investing activities, net		24	(259)
Net cash used in investing activities	(109,175)	(195,193)	(180,029)
Cash Flows From Financing Activities:
Proceeds from the issuance of debt, net	713,658		543,935
Repayments of long-term debt	(15,505)	(15,506)	(565,592)
Proceeds from draw on revolving credit facility	272,500	294,000	95,000
Repayments of revolving credit facility	(322,500)	(274,000)	(80,000)
Purchase of treasury stock	(12,406)	(150,000)	(98,032)
Payment of tax withholdings on equity-based compensation through shares withheld	(3,915)	(4,841)	(3,977)
Exercise of stock options	2,920	3,795	4,282
Debt issuance costs	(7,530)		(8,086)
Other financing activities	(3,018)	(753)	(426)
Net cash provided by (used in) financing activities	624,204	(147,305)	(112,896)
Change in Cash and Cash Equivalents, including Restricted Cash	394,300	5,918	1,010
Cash and Cash Equivalents, including Restricted Cash—Beginning of year	40,925	35,007	33,997
Cash and Cash Equivalents, including Restricted Cash—End of year	435,225	40,925	35,007
Supplemental Disclosures of Noncash Financing Activities
Capital expenditures in accounts payable and accrued expenses	12,544	$ 39,538	$ 30,760
Other financing arrangements	$ 3,890