CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities:
Net income (loss)	$ (310,717)	$ 16,954
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Goodwill impairment	379,863	0
Depreciation	26,543	19,393
Amortization of intangible assets	1,771	1,771
Share-based compensation expense	10,078	12,063
Change in debt discounts and deferred debt issuance costs	6,442	5,914
Deferred income taxes	(50,321)	116
(Gain) loss on sale of property and equipment	(1,479)	1,474
Changes in other components of working capital	(177,471)	(113,887)
Other long-term liabilities	3,209	(5,276)
Other,net	596	(902)
NET CASH USED IN OPERATING ACTIVITIES	(111,486)	(62,380)
Cash Flows from Investing Activities:
Acquisition of property and equipment	(39,346)	(48,303)
Proceeds from sale of property and equipment	3,629	4,120
Investment in securities	(13,660)	(8,549)
Proceeds from maturities and sales of investments in securities	8,131	7,982
NET CASH USED IN INVESTING ACTIVITIES	(41,246)	(44,750)
Cash Flows from Financing Activities:
Proceeds from debt	716,139	1,246,677
Repayment of debt	(527,159)	(1,165,283)
Business acquisition related payment	0	(15,951)
Cash payments related to share-based compensation	(2,363)	(2,458)
Distributions paid to noncontrolling interests	(4,000)	(12,500)
Contributions from noncontrolling interests	5,379	1,000
Debt modification costs	(504)	0
NET CASH PROVIDED BY FINANCING ACTIVITIES	187,492	51,485
Net increase (decrease) in cash, cash equivalents and restricted cash	34,760	(55,645)
Cash, cash equivalents and restricted cash at beginning of period	119,863	197,648
Cash, cash equivalents and restricted cash at end of period	$ 154,623	$ 142,003