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STOCK-BASED COMPENSATION AND EMPLOYEE BENEFIT PLANS - Summary of Performance-Based Restricted Stock Activity (Details) - Performance Shares - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Restricted Shares      
Outstanding beginning of period (in shares) 338,470    
Granted (in shares) 137,052    
Vested (in shares) 0    
Canceled (in shares) (87,241)    
Outstanding end of period (in shares) 388,281 338,470  
Expected to vest (in shares) 149,801    
Weighted Average Grant Date Fair Value      
Outstanding beginning of period (in usd per share) $ 17.01    
Granted (in usd per share) 20.55 $ 17.27 $ 13.70
Vested (in usd per share) 22.00    
Canceled (in usd per share) 22.00    
Outstanding end of period (in usd per share) 17.14 $ 17.01  
Expected to vest (in usd per share) $ 18.48