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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, 2020
Mar. 31, 2019
Numerator for basic net income (loss) per common share [Abstract]    
Net loss $ (204,653) $ (7,746)
Preferred stock dividends (4,842) (4,842)
Earnings participation of unvested equity awards (32) (19)
Numerator for basic net income (loss) per common share $ (209,527) $ (12,607)
Denominator for basic net income (loss) per common share [Abstract]    
Average number of shares of common stock outstanding (in shares) 95,636 85,549
Average unvested stock awards outstanding (in shares) (739) (655)
Denominator for basic net income (loss) per common share (in shares) 94,897 84,894
Basic net income (loss) per common share (in dollars per share) $ (2.21) $ (0.15)
Numerator for diluted net income (loss) per common share [Abstract]    
Numerator for basic net income (loss) per common share $ (209,527) $ (12,607)
Denominator for diluted net income (loss) per common share [Abstract]    
Diluted net income (loss) per common share (in dollars per share) $ (2.21) $ (0.15)