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STOCKHOLDERS' EQUITY AND COMPENSATION ARRANGEMENTS - Narrative (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
vote
shares
Sep. 30, 2020
shares
Sep. 30, 2021
USD ($)
vote
shares
Sep. 30, 2020
shares
May 31, 2018
USD ($)
Share-based Payment Arrangement [Abstract]          
Number of shares available for issuance (in shares) 100,500,000   100,500,000    
Common stock, vote per share | vote 1   1    
Authorized repurchase amount | $         $ 300,000,000
Stock repurchased during period (in shares) 0 0 0 0  
Value of common stock remaining available for repurchase | $ $ 245,000,000   $ 245,000,000    
Number of shares available for future issuance (in shares) 2,852,119   2,852,119