EARNINGS PER SHARE - Computation of Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net income (loss)	$ (33,490)	$ (2,418)	$ 16,058	$ (15,262)	$ 58,839	$ (8,590)	$ 13,341	$ 6,190	$ (35,112)	$ 69,780	$ (150,262)
Income (Loss) From Continuing Operations Before Equity Method Investments									(40,408)	69,780	(150,262)
Cumulative undeclared convertible preferred stock dividend									18,810	957	0
Net (loss) income attributable to common shareholders									$ (53,922)	$ 68,823	$ (150,262)
Weighted average common shares outstanding - basic (in shares)	83,878	83,823	83,663	83,510	83,476	83,412	83,332	83,232	83,720	83,364	68,789
(Loss) income per common share - basic (in USD per share)	$ (0.46)	$ (0.09)	$ 0.13	$ (0.23)	$ 0.69	$ (0.10)	$ 0.16	$ 0.07	$ (0.64)	$ 0.83	$ (2.18)
Cumulative undeclared convertible preferred stock dividend									$ 18,810	$ 0	$ 0
Net (loss) income attributable to common shareholders									$ (53,922)	$ 69,780	$ (150,262)
Weighted average common shares outstanding - diluted (in shares)	83,878	83,823	140,942	83,510	94,388	83,412	83,409	83,368	83,720	86,171	68,789
(Loss) income per common share - diluted (in USD per share)	$ (0.46)	$ (0.09)	$ 0.11	$ (0.23)	$ 0.62	$ (0.10)	$ 0.16	$ 0.07	$ (0.64)	$ 0.81	$ (2.18)