CONTINGENCIES AND COMMITMENTS (Details) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Commitments And Contingencies Disclosure Abstract
Letter of credit requirement		$ 1,856,000	$ 670,000
FCC' s fine single Incident		397,251
FCC's maximum fine		3,666,930
Rental Expense for office and broadcasting facilities		23,742,000	17,892,000	$ 16,116,000
Proceeds from legal settlements	$ 2,300,000		$ 2,300,000
Estimated Impairment KDND		13,500,000
Unrecorded Unconditional Purchase Obligation [Line Items]
Total commitments 2018		263,261,000
Total commitments 2019		160,453,000
Total commitments 2020		126,609,000
Total commitments 2021		95,842,000
Total commitments 2022		70,388,000
Thereafter		191,275,000
Total		907,828,000
Operating Leases
Unrecorded Unconditional Purchase Obligation [Line Items]
Total commitments 2018		51,675,000
Total commitments 2019		49,547,000
Total commitments 2020		44,962,000
Total commitments 2021		40,219,000
Total commitments 2022		34,853,000
Thereafter		154,963,000
Total		376,219,000
Programming And Related Contracts
Unrecorded Unconditional Purchase Obligation [Line Items]
Total commitments 2018		210,691,000
Total commitments 2019		109,986,000
Total commitments 2020		80,699,000
Total commitments 2021		54,647,000
Total commitments 2022		34,529,000
Thereafter		28,579,000
Total		519,131,000
Sale Leaseback Operating Lease [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Total commitments 2018		895,000
Total commitments 2019		920,000
Total commitments 2020		948,000
Total commitments 2021		976,000
Total commitments 2022		1,006,000
Thereafter		7,733,000
Total		12,478,000
Unfavorable Contract Liabilities [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Total commitments 2018		295,000
Total commitments 2019		167,000
Total commitments 2020		147,000
Total commitments 2021		91,000
Total commitments 2022		80,000
Thereafter		346,000
Total		1,126,000
Unfavorable Contract Liabilities [Member] | CBS Radio [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Total commitments 2018		7,648,000
Total commitments 2019		7,323,000
Total commitments 2020		6,918,000
Total commitments 2021		6,618,000
Total commitments 2022		5,742,000
Thereafter		7,068,000
Total		$ 41,317,000