CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Cash Flows from Operating Activities:
Net income (loss)		$ 4,722	$ (10,942)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation		12,831	9,301
Amortization of intangible assets		886	886
Share-based compensation expense		5,506	6,081
Change in debt discounts and deferred debt issuance costs	[1]	3,174	2,927
Deferred income taxes		142	186
(Gain) loss on sale of property and equipment		(107)	1,471
Changes in other components of working capital		(154,192)	(84,272)
Other long-term liabilities		2,177	1,139
Other,net		76	(180)
NET CASH USED IN OPERATING ACTIVITIES		(124,785)	(73,403)
Cash Flows from Investing Activities:
Acquisition of property and equipment		(14,412)	(19,970)
Proceeds from sale of property and equipment		201	3,303
Investment in securities		(8,357)	(3,288)
Proceeds from maturities and sales of investments in securities		3,324	3,007
NET CASH USED IN INVESTING ACTIVITIES		(19,244)	(16,948)
Cash Flows from Financing Activities:
Proceeds from debt		394,000	665,000
Repayment of debt		(259,691)	(586,559)
Cash payments related to share-based compensation		(2,364)	(2,308)
Distributions paid to noncontrolling interests		(4,000)	(5,000)
Contributions from noncontrolling interests		2,798
NET CASH PROVIDED BY FINANCING ACTIVITIES		130,743	71,133
Net decrease in cash, cash equivalents and restricted cash		(13,286)	(19,218)
Cash, cash equivalents and restricted cash at beginning of period		119,863	197,648
Cash, cash equivalents and restricted cash at end of period		$ 106,577	$ 178,430

[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 three months ended March 31, 2019.