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STOCKHOLDERS' EQUITY - Summary of Preferred Stock (Details) - Preferred Stock - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Class of Stock [Line Items]      
Preferred stock, shares outstanding (in shares) 98,702 191,972  
Liquidation Preference $ 98,702 $ 191,972  
Series D Preferred Stock      
Class of Stock [Line Items]      
Non cumulative preferred stock, dividend rate (percent) 7.375% 7.375%  
Preferred stock, shares outstanding (in shares) 0 93,270  
Liquidation Preference $ 0 $ 93,270  
Carrying Value $ 89,922 $ 3,240 $ 17,711
Series E Preferred Stock      
Class of Stock [Line Items]      
Non cumulative preferred stock, dividend rate (percent) 7.00% 7.00%  
Preferred stock, shares outstanding (in shares) 98,702 98,702  
Liquidation Preference $ 98,702 $ 98,702  
Carrying Value $ 0 $ 1,707 $ 23,592