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STOCK-BASED COMPENSATION - Summary of Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of Shares      
Balance beginning of period (in shares) 414,080    
Exercised (in shares) (200,782)    
Forfeited (in shares) 0    
Expired (in shares) (13,587)    
Balance end of period (in shares) 199,711 414,080  
Options Exercisable (in shares) 154,533    
Weighted Average Grant Date Fair Value      
Balance beginning of period (in usd per share) $ 11.60    
Exercised (in usd per share) 11.09    
Forfeited (in usd per share) 0    
Expired (in shares) 10.21    
Balance end of period (in usd per share) 12.20 $ 11.60  
Options Exercisable (in usd per share) $ 11.82    
Weighted Average Remaining Contractual Life      
Options Outstanding 2 years 1 month 6 days 2 years 2 months 12 days  
Options Exercisable at End of Period 2 years    
Aggregate Intrinsic Value ($ in millions)      
Options outstanding $ 1.5 $ 2.3  
Exercised 1.3 $ 0.5 $ 0.5
Options Exercisable $ 1.2