EARNINGS PER SHARE (''EPS'') - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net (loss) income attributable to common stockholders	$ (4,448)	$ 72,257	$ (9,350)	$ 357,447
Redeemable preferred stock dividends declared on dilutive shares	0	0	0	0
Numerator for dilutive net (loss) income attributable to common stockholders	$ (4,448)	$ 72,257	$ (9,350)	$ 357,447
Denominator:
Basic weighted average shares of Common Stock outstanding (in shares)	43,795	57,876	43,791	73,503
Effect of dilutive securities—contingently issuable shares (in shares)	0	0	0	0
Diluted weighted average shares and common stock equivalents outstanding (in shares)	43,795	57,876	43,791	73,503
Net (loss) income attributable to common stockholders per share:
Basic (in usd per share)	$ (0.10)	$ 1.25	$ (0.21)	$ 4.86
Diluted (in usd per share)	$ (0.10)	$ 1.25	$ (0.21)	$ 4.86