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			9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator for basic net income (loss) per common share [Abstract]
Net income (loss)	$ 29,082	$ 3,196	$ 3,196	$ (152,867)	$ (68,010)
Preferred stock dividends	(4,842)	(4,842)	$ (4,842)	(14,526)	(14,526)
Earnings participation of unvested equity awards	(37)	(25)		(101)	(69)
Numerator for basic net income (loss) per common share	$ 24,203	$ (1,671)		$ (167,494)	$ (82,605)
Denominator for basic net income (loss) per common share [Abstract]
Average number of shares of common stock outstanding (in shares)	96,452	91,560		96,162	87,578
Average unvested stock awards outstanding (in shares)	(754)	(615)		(744)	(632)
Denominator for basic net income (loss) per common share (in shares)	95,698	90,945	90,945	95,418	86,946
Basic net income (loss) per common share (in dollars per share)	$ 0.25	$ (0.02)		$ (1.76)	$ (0.95)
Numerator for diluted net income (loss) per common share [Abstract]
Numerator for basic net income (loss) per common share	$ 24,203	$ (1,671)		$ (167,494)	$ (82,605)
Denominator for diluted net income (loss) per common share [Abstract]
Denominator for basic net income (loss) per common share (in shares)	95,698	90,945	90,945	95,418	86,946
Net effect of dilutive equity awards (in shares)	326
Denominator for diluted net income (loss) per common share (in shares)	96,024	90,945	90,945	95,418	86,946
Diluted net income (loss) per common share (in dollars per share)	$ 0.25	$ (0.02)		$ (1.76)	$ (0.95)