CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2013	$ 970,286,000	$ 49,000	$ (860,000)	$ 1,398,324,000	$ (425,165,000)	$ (2,062,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(189,543,000)				(189,543,000)
Adjustment for fair value accounting of derivatives, net of tax	88,178,000					88,178,000
Adjustment for foreign currency translation, net of tax	(2,801,000)					(2,801,000)
Exercise of stock options and vesting of restricted stock	(7,119,000)			(7,119,000)
Amortization of stock compensation expense	16,709,000			16,709,000
Net tax impact from stock option exercises and restricted stock vesting	(54,000)			(54,000)
Issuance of common stock	225,947,000	6,000		225,941,000
Ending Balance at Dec. 31, 2014	1,101,603,000	55,000	(860,000)	1,633,801,000	(614,708,000)	83,315,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(1,090,915,000)				(1,090,915,000)
Adjustment for fair value accounting of derivatives, net of tax	(62,758,000)					(62,758,000)
Adjustment for foreign currency translation, net of tax	(2,605,000)					(2,605,000)
Exercise of stock options and vesting of restricted stock	(2,638,000)			(2,638,000)
Amortization of stock compensation expense	17,524,000			17,524,000
Net tax impact from stock option exercises and restricted stock vesting	0
Ending Balance at Dec. 31, 2015	(39,789,000)	55,000	(860,000)	1,648,687,000	(1,705,623,000)	17,952,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(590,586,000)				(590,586,000)
Adjustment for fair value accounting of derivatives, net of tax	(24,025,000)					(24,025,000)
Adjustment for foreign currency translation, net of tax	6,073,000					6,073,000
Exercise of stock options and vesting of restricted stock	(731,000)	1,000		(732,000)
Amortization of stock compensation expense	11,776,000			11,776,000
Net tax impact from stock option exercises and restricted stock vesting	0
Ending Balance at Dec. 31, 2016	$ (637,282,000)	$ 56,000	$ (860,000)	$ 1,659,731,000	$ (2,296,209,000)	$ 0