NET INCOME (LOSS) PER COMMON SHARE - Components of Computation of Basic and Diluted Net Income (loss) per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator for basic net income (loss) per common share [Abstract]
Net income (loss)	$ 22,704	$ (63,460)	$ (181,949)	$ (71,206)
Preferred stock dividends	(4,842)	(4,842)	(9,684)	(9,684)
Earnings participation of unvested equity awards	(40)	(25)	(64)	(44)
Numerator for basic net income (loss) per common share	$ 17,822	$ (68,327)	$ (191,697)	$ (80,934)
Denominator for basic net income (loss) per common share [Abstract]
Average number of shares of common stock outstanding (in shares)	96,395	85,559	96,015	85,554
Average unvested stock awards outstanding (in shares)	(740)	(625)	(739)	(640)
Denominator for basic net income (loss) per common share (in shares)	95,655	84,934	95,276	84,914
Basic net income (loss) per common share (in dollars per share)	$ 0.19	$ (0.80)	$ (2.01)	$ (0.95)
Numerator for diluted net income (loss) per common share [Abstract]
Numerator for basic net income (loss) per common share	$ 17,822	$ (68,327)	$ (191,697)	$ (80,934)
Denominator for diluted net income (loss) per common share [Abstract]
Denominator for basic net income (loss) per common share (in shares)	95,655	84,934	95,276	84,914
Net effect of dilutive equity awards (in shares)	232
Denominator for diluted net income (loss) per common share (in shares)	95,887	84,934	95,276	84,914
Diluted net income (loss) per common share (in dollars per share)	$ 0.19	$ (0.80)	$ (2.01)	$ (0.95)