EARNINGS (LOSS) PER SHARE - EPS Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Shares
Basic net earnings (loss) per Share (in shares)	36,980,356	35,741,877	36,728,911	32,650,408
Dilutive shares related to warrants (in shares)	0
Change in fair value of derivative instruments (in shares)	0	0
Convertible Debt (in shares)	0	2,642,160	0	2,642,160
Dilutive net earnings (loss) per share (in shares)	36,980,356	42,752,859	36,728,911	36,800,536
Net Income
Basic net earnings (loss) per Share	$ (37,113)	$ 105,578	$ (39,300)	$ 119,706
Change in fair value of derivative instruments		(29,991)
Convertible debt	0	518	0	1,553
Dilutive net earnings (loss) per share	$ (37,113)	$ 76,105	$ (39,300)	$ 121,259
Basic Earnings per Share, EPS (in dollars per share)	$ (1.00)	$ 2.95	$ (1.07)	$ 3.67
Diluted Earnings per Share, EPS (in dollars per share)	$ (1.00)	$ 1.78	$ (1.07)	$ 3.30
Restricted stock units
Shares
Dilutive securities (in shares)	0	409,166	0	331,073
Net Income
Dilutive securities	$ 0	$ 0	$ 0	$ 0
Stock Options
Shares
Dilutive securities (in shares)	0	1,905,722	0	1,176,895
Net Income
Dilutive securities	$ 0	$ 0	$ 0	$ 0
Warrant
Shares
Dilutive shares related to warrants (in shares)		2,053,934
Net Income
Dilutive securities	0	$ 0
Change in fair value of derivative instruments	$ 0