Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net loss	$ (83,339)	$ (32,624)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	56,152	60,929
Accretion on asset retirement obligation	36	33
Change in allowance for doubtful accounts	(250)	(457)
Amortization of deferred financing costs	2,991	743
Amortization of premium on notes	(68)	(62)
Non-cash compensation	2,841	3,969
(Gain) Loss on disposal of assets	(75)	48
Deferred income taxes	(5,066)	(17,885)
Changes in operating assets and liabilities:
Accounts receivable	23,641	88,781
Inventories	3,099	4,788
Income tax receivable	551	(2,116)
Prepaid expenses and other current assets	2,012	(25)
Other assets	(14)	(16,903)
Accounts payable	(18,648)	1,791
Other liabilities	(4,438)	(65)
Accrued expenses	(214)	(25,168)
Net cash (used in) provided by operating activities	(20,789)	65,777
Cash flows from investing activities:
Purchase of property and equipment	(4,577)	(25,861)
Proceeds from sale of assets	513	3,261
Change in restricted cash	(83,606)
Net cash used in investing activities	(87,670)	(22,600)
Cash flows from financing activities:
Payments of debt	(12,784)	(14,358)
Proceeds from debt	165,000
Purchase of treasury stock	(638)	(4,490)
Tax withholding from exercise of stock options		(3)
Exercise of employee stock options		727
Deferred loan costs and other financing activities	(14,768)	(32)
Net cash (used in) provided by in financing activities	136,810	(18,156)
Net increase in cash and equivalents	28,351	25,021
Cash and cash equivalents - beginning of period	46,732	79,915
Cash and cash equivalents - end of period	$ 75,083	$ 104,936