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STOCKHOLDERS' EQUITY - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2018
Equity [Line Items]        
Stock repurchased and retired (in shares)   820,328    
Repurchase Plan 2020 | Common Stock        
Equity [Line Items]        
Number of shares authorized to be repurchased (in shares)     2,350,000  
Repurchase Plan 2018 | Common Stock        
Equity [Line Items]        
Stock repurchased (in shares) 0      
Shares available for issuance (in shares)       1,800,000
Stock repurchased and retired (in shares)   820,328 1,488,519  
Stock repurchased and retired   $ 25.7 $ 50.0  
Common stock repurchased, average price (in dollars per share)     $ 33.58