CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash Flows from Operating Activities:
Net income	$ 13,764	$ 15,400
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation	20,110	11,923
Amortization of intangible assets	886	886
Share-based compensation expense	4,306	3,647
Change in debt discounts and deferred debt issuance costs	3,836	1,687
Deferred income taxes	(526)	(155)
(Gain) loss on sale of property and equipment	(131)	285
Other long-term liabilities	(1,824)	(4,061)
Other non-cash items	267	1,399
Changes in other components of working capital	(73,533)	(15,067)
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	(32,845)	15,944
Cash Flows from Investing Activities:
Acquisition of property and equipment excluding financed purchases	(5,672)	(4,812)
Proceeds from sale of property and equipment	259	939
Change in restricted cash	(9,654)	(3,305)
NET CASH USED IN INVESTING ACTIVITIES	(15,067)	(7,178)
Cash Flows from Financing Activities:
Proceeds from debt	313,977	299,785
Repayment of debt	(296,485)	(287,484)
Issuance of common stock and effect of cashless exercise	(10,809)
Debt issuance costs	(57)	(5,937)
NET CASH PROVIDED BY FINANCING ACTIVITIES	6,626	6,364
Net (decrease) increase in cash and cash equivalents	(41,286)	15,130
Cash and cash equivalents at beginning of period	146,103	75,452
Cash and cash equivalents at end of period	$ 104,817	$ 90,582