CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019
Cash Flows from Operating Activities:
Net income (loss)		$ 56,997,000	$ (310,717,000)
Adjustments to reconcile net income (loss) to net cash provided by (used) in operating activities:
Goodwill impairment			379,863,000
Depreciation		34,180,000	26,543,000
Amortization of intangible assets		14,596,000	1,771,000
Share-based compensation expense		8,264,000	10,078,000
Change in debt discount and deferred debt issuance costs	[1]	7,046,000	6,442,000
Deferred income taxes		5,423,000	(50,321,000)
Gain (loss) on sale of property and equipment		31,000	(1,479,000)
Changes in other components of working capital		(68,471,000)	(177,471,000)
Other long-term liabilities		1,295,000	3,209,000
Other, net		(1,131,000)	596,000
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES		58,230,000	(111,486,000)
Cash Flows from Investing Activities:
Acquisition of property and equipment		(31,386,000)	(39,346,000)
Proceeds from sale of property and equipment		1,082,000	3,629,000
Investment in securities		(13,319,000)	(13,660,000)
Proceeds from maturities and sales of investments in securities		10,985,000	8,131,000
NET CASH USED IN INVESTING ACTIVITIES		(32,638,000)	(41,246,000)
Cash Flows from Financing Activities:
Proceeds from debt		752,843,000	716,139,000
Repayment of debt		(757,141,000)	(527,159,000)
Cash payments related to share-based compensation		(994,000)	(2,363,000)
Distributions paid to noncontrolling interests		(30,910,000)	(4,000,000)
Contributions from noncontrolling interests			5,379,000
Debt modification costs			(504,000)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES		(36,202,000)	187,492,000
Net increase (decrease) in cash, cash equivalents and restricted cash		(10,610,000)	34,760,000
Cash, cash equivalents and restricted cash at beginning of period		202,101,000	119,863,000
Cash, cash equivalents and restricted cash at end of period		$ 191,491,000	$ 154,623,000

[1] The combination of cash and non-cash interest expense produces effective interest rates that are higher than contractual rates. Accordingly, the effective interest rates for the 2017 Senior Notes and the Convertible Notes were 7.13% and 9.39%, respectively, for the six months ended June 30, 2020.