Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash Flows From Operating Activities:
Net loss	$ (8,987)	$ (44,884)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	38,612	36,558
Amortization of debt issuance costs and discounts	1,532	1,717
Deferred income tax benefit	(6,531)	(5,773)
Equity-based compensation	6,982	4,473
Other, including loss on sale or disposal of assets, net	4,420	487
Changes in assets and liabilities:
Accounts receivable	3,408	(28,548)
Inventories	(15,601)	1,854
Prepaid expenses and other current assets	(7,653)	(2,533)
Accounts payable and accrued expenses	5,599	(2,226)
Accrued salaries, wages and benefits	(2,841)	4,246
Deferred revenue	53,584	66,386
Other accrued liabilities	(5,675)	(11,887)
Right of use assets and operating lease liabilities	201	115
Other assets and liabilities	3,744	(1,592)
Net cash provided by operating activities	70,794	18,393
Cash Flows From Investing Activities:
Capital expenditures	(35,110)	(15,298)
Net cash used in investing activities	(35,110)	(15,298)
Cash Flows From Financing Activities:
Repayments of long-term debt	(3,000)	(3,876)
Purchase of treasury stock	(89,736)
Payment of tax withholdings on equity-based compensation through shares withheld	(7,738)	(1,971)
Exercise of stock options	1,127	2,393
Other financing activities	(211)	(2,158)
Net cash used in financing activities	(99,558)	(5,612)
Change in Cash and Cash Equivalents, including Restricted Cash	(63,874)	(2,517)
Cash and Cash Equivalents, including Restricted Cash—Beginning of period	444,486	435,225
Cash and Cash Equivalents, including Restricted Cash—End of period	380,612	432,708
Supplemental Disclosure of Noncash Investing and Financing Activities
Capital expenditures in accounts payable	31,483	15,763
Treasury stock purchases not yet settled in other accrued liabilities	$ 20,169
Other financing arrangements		$ 4,239