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
	Mar. 31, 2021	Mar. 31, 2020
Numerator for basic net income (loss) per common share [Abstract]
Net income (loss)	$ 18,942	$ (204,653)
Preferred stock dividends	(4,842)	(4,842)
Earnings participation of unvested equity awards	(36)	(32)
Numerator for basic net income (loss) per common share	$ 14,064	$ (209,527)
Denominator for basic net income (loss) per common share [Abstract]
Average number of shares of common stock outstanding (in shares)	96,793	95,636
Average unvested stock awards outstanding (in shares)	(899)	(739)
Denominator for basic net income (loss) per common share (in shares)	95,894	94,897
Basic net income (loss) per common share (in dollars per share)	$ 0.15	$ (2.21)
Numerator for diluted net income (loss) per common share [Abstract]
Numerator for basic net income (loss) per common share	$ 14,064	$ (209,527)
Denominator for diluted net income (loss) per common share [Abstract]
Denominator for basic net income (loss) per common share (in shares)	95,894	94,897
Net effect of dilutive equity awards (in shares)	336
Denominator for diluted net income (loss) per common share (in shares)	96,230	94,897
Diluted net income (loss) per common share (in dollars per share)	$ 0.15	$ (2.21)