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LONG-TERM DEBT LIABILITIES - Senior Debt (Details)
$ in Millions
Sep. 30, 2017
USD ($)
Nov. 01, 2016
USD ($)
Debt Instrument [Line Items]    
Undrawn amount of the Revolver $ 36.8  
Consolidated Leverage Ratio 4.9  
Consolidated Interest Coverage Ratio 3.8  
New Credit Facility, Amount Outstanding $ 458.0 $ 540.0
Additional Tranche - CBS Radio Facility $ 500.0  
Minimum [Member]    
Debt Instrument [Line Items]    
Consolidated Interest Coverage Ratio 2  
Maximum [Member]    
Debt Instrument [Line Items]    
Consolidated Leverage Ratio 5  
AdditionalTrancheCbsRadioFacility [Member]    
Debt Instrument [Line Items]    
Mandatory Prepayment Percentage 1.00%  
AdditionalTrancheCbsRadioFacility [Member] | Libor Rate Plus    
Debt Instrument [Line Items]    
Variable rate plus fees 2.75%