v3.10.0.1
CONTINGENCIES AND COMMITMENTS (Details) - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Commitments And Contingencies Disclosure Abstract      
Letter of credit requirement $ 5,862,000 $ 1,856,000  
FCC' s fine single Incident 407,270    
FCC's maximum fine 3,759,410    
Rental Expense for office and broadcasting facilities 53,948,000 23,742,000 $ 17,892,000
Proceeds from legal settlements     $ 2,300,000
Estimated Impairment KDND   13,500,000  
Unrecorded Unconditional Purchase Obligation [Line Items]      
Total commitments 2018 220,759,000    
Total commitments 2019 171,716,000    
Total commitments 2020 133,049,000    
Total commitments 2021 99,119,000    
Total commitments 2022 84,324,000    
Thereafter 183,472,000    
Total 892,439,000    
OtherCommitmentsLineItems      
RestrictedCash 69,365,000 0  
NetChicagoLandProceeds 45,500,000    
NetLAandSanDiegoProceeds 24,700,000    
Total Proceeds 70,200,000    
Operating Leases      
Unrecorded Unconditional Purchase Obligation [Line Items]      
Total commitments 2018 50,455,000    
Total commitments 2019 49,556,000    
Total commitments 2020 45,870,000    
Total commitments 2021 40,451,000    
Total commitments 2022 37,194,000    
Thereafter 159,208,000    
Total 382,734,000    
Programming And Related Contracts      
Unrecorded Unconditional Purchase Obligation [Line Items]      
Total commitments 2018 169,384,000    
Total commitments 2019 121,212,000    
Total commitments 2020 86,202,000    
Total commitments 2021 57,662,000    
Total commitments 2022 46,094,000    
Thereafter 17,567,000    
Total 498,121,000    
Sale Leaseback Operating Lease [Member]      
Unrecorded Unconditional Purchase Obligation [Line Items]      
Total commitments 2018 920,000    
Total commitments 2019 948,000    
Total commitments 2020 977,000    
Total commitments 2021 1,006,000    
Total commitments 2022 1,036,000    
Thereafter 6,697,000    
Total 11,584,000    
Unfavorable Contract Liabilities [Member] | CBS Radio [Member]      
Unrecorded Unconditional Purchase Obligation [Line Items]      
Total commitments 2018 7,318,000    
Total commitments 2019 6,909,000    
Total commitments 2020 6,606,000    
Total commitments 2021 5,725,000    
Total commitments 2022 6,099,000    
Thereafter 1,011,000    
Total 33,668,000    
Cash and Cash Equivalents Member      
OtherCommitmentsLineItems      
Cash 122,893,000 34,167,000  
RestrictedCash 69,365,000 0  
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents $ 192,258,000 $ 34,167,000