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INCOME TAXES - Taxes Paid (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Federal and state    
Income taxes    
Income tax refunds received (in dollars)   $ 0.4
Federal and state | Maximum    
Income taxes    
Income tax refunds received (in dollars) $ 0.1  
Federal, state and foreign    
Income taxes    
Income taxes paid (in dollars) $ 15.3  
State and foreign    
Income taxes    
Income taxes paid (in dollars)   $ 2.3