EARNINGS PER SHARE (''EPS'') (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net income (loss) attributable to common stockholders	$ 287,631	$ (3,026)
Redeemable preferred stock dividends declared on dilutive shares	492	0
Diluted net income (loss) attributable to common stockholders	$ 288,123	$ (3,026)
Denominator:
Basic weighted average shares outstanding (in shares)	43,795	43,785
Effect of dilutive securities—contingently issuable shares and stock options (in shares)	1,941	0
Diluted weighted average shares and common stock equivalents outstanding (in shares)	45,736	43,785
Net income (loss) attributable to common stockholders per share:
Basic (in usd per share)	$ 6.57	$ (0.07)
Diluted (in usd per share)	$ 6.30	$ (0.07)