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STOCKHOLDERS' EQUITY - Share Repurchases and Dividends (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Jul. 12, 2018
Subsequent Event [Line Items]                
Stock repurchase program, authorized amount               $ 300,000,000
Payments for Repurchase of Common Stock         $ 55,800,000 $ 2,200,000 $ 105,000,000  
Treasury stock acquired (in shares)         2,500,000      
Treasury stock acquired, cost method $ 1,000,000.0 $ 54,900,000 $ 2,100,000 $ 300,000        
Stock repurchased during period, shares           0    
Dividends declared (in dollars per share)   $ 0.12            
Share Repurchase Program Approved By Board of Directors                
Subsequent Event [Line Items]                
Treasury stock acquired, cost method         $ 54,600,000