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		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Numerator:
Net (loss) income attributable to common stockholders	$ (1,876)	$ 91,291	$ (4,902)	$ 285,190
Redeemable preferred stock dividends declared on dilutive shares	0	0	0	0
Numerator for dilutive net (loss) income attributable to common stockholders	$ (1,876)	$ 91,291	$ (4,902)	$ 285,190
Denominator:
Basic weighted average shares of Common Stock outstanding (in shares)	43,791	78,871	43,788	81,445
Effect of dilutive securities—contingently issuable shares (in shares)	0	0	0	0
Diluted weighted average shares and common stock equivalents outstanding (in shares)	43,791	78,871	43,788	81,445
Net (loss) income attributable to common stockholders per share:
Basic (in usd per share)	$ (0.04)	$ 1.16	$ (0.11)	$ 3.50
Diluted (in usd per share)	$ (0.04)	$ 1.16	$ (0.11)	$ 3.50