CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flows from Operating Activities:
Net income (loss)	$ (10,942)	$ 13,764
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation	9,301	20,110
Amortization of intangible assets	886	886
Share-based compensation expense	6,081	4,306
Change in debt discounts and deferred debt issuance costs	2,927	3,836
Deferred income taxes	186	(526)
Loss (gain) on sale of property and equipment	1,471	(131)
Other long-term liabilities	1,139	(1,824)
Other	(180)	267
Changes in other components of working capital	(84,272)	(73,533)
NET CASH USED IN OPERATING ACTIVITIES	(73,403)	(32,845)
Cash Flows from Investing Activities:
Acquisition of property and equipment excluding financed purchases	(19,970)	(5,672)
Proceeds from sale of property and equipment	3,303	259
Investments in securities restricted in use	(3,288)
Proceeds from maturities and sales of investments in securities	3,007
NET CASH USED IN INVESTING ACTIVITIES	(16,948)	(5,413)
Cash Flows from Financing Activities:
Proceeds from debt	665,000	313,977
Repayment of debt	(586,559)	(296,485)
Issuance of common stock and effect of cashless exercise	(2,308)	(10,809)
Distributions paid to noncontrolling interests	(5,000)
Debt issuance and extinguishment costs		(57)
NET CASH PROVIDED BY FINANCING ACTIVITIES	71,133	6,626
Net decrease in cash, cash equivalents and restricted cash	(19,218)	(31,632)
Cash, cash equivalents and restricted cash at beginning of period	197,648	196,607
Cash, cash equivalents and restricted cash at end of period	$ 178,430	$ 164,975