Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Cash flows from operating activities:
Net (loss) income	$ (95,528)	$ 200,209	$ (296,324)	$ 230,973
Adjustments to reconcile net (loss) income to net cash used in and provided by operating activities:
Depreciation and amortization	28,785	30,685	88,883	89,033
Stock-based compensation			18,207	11,347
Interest accretion on notes payable			881	988
Loss on debt extinguishment			6,106	6,231
Amortization of debt issuance costs			4,558	2,703
Other, including loss on disposal of assets			10,308	3,773
Gain on sale of investee				(724)
Decrease (increase) in accounts receivable			58,789	(83,061)
Increase in inventories, prepaid expenses and other current assets			(27,379)	(19,188)
Decrease in deposits and other assets			4,353	242
Decrease in ROU operating leases			886	6,030
Increase in accounts payable, deferred revenue, accrued liabilities and other long-term liabilities			69,014	62,266
Increase (decrease) in operating lease liabilities			3,776	(10,823)
Increase (decrease) in accrued interest payable			17,957	(9,878)
Deferred income taxes			(113,979)	50,953
Net cash (used in) provided by operating activities			(153,964)	340,865
Cash flows from investing activities:
Additions to property and equipment			(92,960)	(123,662)
Property insurance recoveries			2,514	1,637
Proceeds from sale of assets				24
Net cash used in investing activities			(90,446)	(122,001)
Cash flows from financing activities:
Repayment of borrowings			(526,510)	(800,750)
Proceeds from borrowings			884,000	970,000
Payment of debt issuance costs			(22,271)	(8,927)
Payment of cash dividends			(22,497)	(208,740)
Proceeds from issuance of common stock			1,871	17,391
Stock repurchases			(54)	(52)
Reduction in finance lease liability			(396)
Purchase of redeemable noncontrolling interest			(4,976)	(217)
Distributions to noncontrolling interests			(20,644)	(20,376)
Net cash provided by (used in) financing activities			288,523	(51,671)
Effect of exchange rate on cash			(4,385)	(4)
Net increase in cash and cash equivalents			39,728	167,189
Cash and cash equivalents at beginning of period			174,179	44,608	$ 44,608
Cash and cash equivalents at end of period	$ 213,907	$ 211,797	213,907	211,797	$ 174,179
Supplemental cash flow information
Cash paid for interest			79,342	93,153
Cash paid for income taxes			$ 4,596	$ 24,953