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STOCKHOLDERS' EQUITY - Narrative (Details) - Preferred Stock
 3 Months Ended
Mar. 31, 2021
$ / shares
shares
Class of Stock [Line Items]  
Preferred stock, authorized (in shares) | shares 50,000,000
Preferred stock, par value (in dollars per share) $ 0.01
Preferred stock, liquidation preference per share (in dollars per share) $ 1,000
Series D Depository Shares  
Class of Stock [Line Items]  
Interest in shares (percent) 2.50%
Series E Depository Shares  
Class of Stock [Line Items]  
Interest in shares (percent) 2.50%