EARNINGS PER SHARE - EPS Calculation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Numerator:
Net income (loss)	$ 25,881	$ 156,212	$ 50,585	$ (105,959)	$ 31,929	$ 45,615	$ (14,733)	$ (86,331)	$ 126,719	$ (23,520)	$ (73,695)
Net income attributable to noncontrolling interests										(11)	(95)
Net income (loss) attributable to common stockholders	$ 25,881	$ 156,224	$ 50,573	$ (105,959)	$ 31,930	$ 45,615	$ (14,760)	$ (86,316)	$ 126,719	$ (23,531)	$ (73,790)
Denominator:
Weighted average basic common shares outstanding	39,473,000	39,473,000	39,468,000	39,465,000	39,464,000	39,465,000	39,458,000	39,454,000	39,470	39,464	39,449
Numerator:
Net income (loss) attributable to common stockholders									$ 126,719	$ (23,531)	$ (73,790)
Warrant Liability Gain									58,320
Adjusted net income (loss) attributable to common stockholders									$ 68,399	$ (23,531)	$ (73,790)
Denominator:
Weighted average basic common shares outstanding	39,473,000	39,473,000	39,468,000	39,465,000	39,464,000	39,465,000	39,458,000	39,454,000	39,470	39,464	39,449
Restricted stock and stock options (in shares)									411
Warrants (in shares)									2,873
Weighted average diluted common shares outstanding	42,743,000	42,913,000	43,197,000	39,465,000	43,027,000	43,171,000	39,458,000	39,454,000	42,754	39,464	39,449
Basic income (loss) per share: (in dollars per share)	$ 0.65	$ 3.96	$ 1.28	$ (2.68)	$ 0.81	$ 1.16	$ (0.37)	$ (2.19)	$ 3.21	$ (0.60)	$ (1.87)
Diluted income (loss) per share: (in dollars per share)	$ 0.59	$ 0.76	$ 0.18	$ (2.68)	$ (1.18)	$ 0.48	$ (0.37)	$ (2.19)	$ 1.60	$ (0.60)	$ (1.87)