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LONG-TERM DEBT - Senior Debt (Details)
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
USD ($)
Jun. 30, 2019
USD ($)
Debt Instrument [Line Items]      
Consolidated leverage ratio 2.5    
Senior secured second-lien notes due 2027      
Debt Instrument [Line Items]      
Medium-term notes   $ 425,000,000.0 $ 325,000,000.0
Interest rate on notes     6.50%
Redemption rate as a percentage of principal amount     106.50%
Percentage of principal amount   105.00%  
Revolving Credit Facility      
Debt Instrument [Line Items]      
Long-term line of credit     $ 89,000,000.0
Senior secured second-lien notes due 2027 - Additional Notes      
Debt Instrument [Line Items]      
Medium-term notes   $ 100,000,000.0  
Interest rate on notes   6.50%  
Term B-1 loan      
Debt Instrument [Line Items]      
Repayments of debt   $ 96,700,000 $ 425,000,000.0
Senior Debt Obligations      
Debt Instrument [Line Items]      
Consolidated leverage ratio 4.0    
Senior Debt Obligations | New Revolver      
Debt Instrument [Line Items]      
Long-term line of credit   250,000,000.0  
Line of credit facility, fair value of amount outstanding   227,300,000  
Senior Debt Obligations | Term B-2 Loan, due November 17, 2024      
Debt Instrument [Line Items]      
Long-term line of credit   $ 770,000,000.0  
Annual payments as percentage of original principal amount.   1.00%  
Senior Debt Obligations | Original Revolver      
Debt Instrument [Line Items]      
Long-term line of credit   $ 250,000,000.0  
Line of credit facility, fair value of amount outstanding   $ 22,700,000  
Senior Debt Obligations | Credit Facility      
Debt Instrument [Line Items]      
Covenant effective period 1 year    
Senior Debt Obligations | Credit Facility | Maximum      
Debt Instrument [Line Items]      
Consolidated leverage ratio 4.5