Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows From Operating Activities:
Net (loss) income	$ (266,785)	$ 113,659
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	114,006	120,325
Amortization of debt issuance costs and discounts	3,279	2,622
Deferred income tax (benefit) provision	(21,305)	39,705
Equity-based compensation	3,203	8,444
Other, including loss on sale or disposal of assets, net	326	3,770
Changes in assets and liabilities:
Accounts receivable	30,391	5,817
Inventories	(1,001)	(919)
Prepaid expenses and other current assets	(742)	5,058
Accounts payable and accrued expenses	6,856	3,775
Accrued salaries, wages and benefits	(3,375)	(4,505)
Deferred revenue	24,973	15,483
Other accrued liabilities	3,659	109
Right-of-use assets and operating lease obligations	418	370
Other assets and liabilities	(1,552)	(30)
Net cash (used in) provided by operating activities	(107,649)	313,683
Cash Flows From Investing Activities:
Capital expenditures	(75,715)	(152,880)
Other investing activities, net		24
Net cash used in investing activities	(75,715)	(152,856)
Cash Flows From Financing Activities:
Proceeds from issuance of senior secured notes, net	713,658
Repayments of long-term debt	(11,629)	(11,629)
Proceeds from draws on revolving credit facility	272,500	269,000
Repayments of revolving credit facility	(322,500)	(249,000)
Purchase of treasury stock	(12,406)	(150,000)
Payment of tax withholdings on equity-based compensation through shares withheld	(3,350)	(4,621)
Exercise of stock options	365	3,578
Debt issuance costs	(2,467)
Other financing activities	(1,861)	(572)
Net cash provided by (used in) financing activities	632,310	(143,244)
Change in Cash and Cash Equivalents, including Restricted Cash	448,946	17,583
Cash and Cash Equivalents, including Restricted Cash—Beginning of period	40,925	35,007
Cash and Cash Equivalents, including Restricted Cash—End of period	489,871	52,590
Supplemental Disclosure of Noncash Investing and Financing Activities:
Capital expenditures in accounts payable	33,925	26,260
Right-of-use assets obtained in exchange for financing lease obligations	208	$ 1,230
Other financing arrangements	$ 2,837