EARNINGS PER SHARE - Computations for Basic and Diluted Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Net (loss) income	$ (2,418)	$ (8,590)	$ (1,622)	$ 10,941
Cumulative undeclared convertible preferred stock dividend	5,031	0	13,697	0
Net (loss) income attributable to common shareholders	$ (7,449)	$ (8,590)	$ (15,319)	$ 10,941
Basic weighted-average shares (in shares)	83,823	83,412	83,667	83,326
(Loss) earnings per common share - basic (in dollars per share)	$ (0.09)	$ (0.10)	$ (0.18)	$ 0.13
Cumulative undeclared convertible preferred stock dividends	$ 5,031	$ 0	$ 13,697	$ 0
Net (loss) income attributable to common shareholders	$ (7,449)	$ (8,590)	$ (15,319)	$ 10,941
Diluted weighted-average shares (in shares)	83,823	83,412	83,667	83,431
(Loss) earnings per common share - diluted (in dollars per share)	$ (0.09)	$ (0.10)	$ (0.18)	$ 0.13