ASSETS HELD FOR SALE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Net Revenues	$ 5,494
Station operating expenses	4,749
Depreciation and amortization	9
TBA income	652
Total Operating Expenses	4,106
Income before taxes	1,388
Summary of the categories of property and equipment
Property, Plant and Equipment, Gross	461,131	$ 187,796
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	132,209	128,322
Property Plant And Equipment Net	346,507	63,375
IntangibleAssetsGrossExcludingGoodwillAbstract
Indefinite-lived Intangible Assets	2,649,959	823,195	$ 807,381
Net Assets Held for Sale	212,320
Goodwill	862,000	$ 32,718	$ 32,629
IntangibleAssetsNetIncludingGoodwill	160,534
BonnevilleTransactionMember [Member]
IntangibleAssetsGrossExcludingGoodwillAbstract
Net Assets Held for Sale	165,870
IntangibleAssetsNetIncludingGoodwill	160,534
OtherTransactionMember [Member]
IntangibleAssetsGrossExcludingGoodwillAbstract
Net Assets Held for Sale	46,450
IntangibleAssetsNetIncludingGoodwill	0
Land and Land Improvements [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	47,110
Land and Land Improvements [Member] | BonnevilleTransactionMember [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	1,110
Land and Land Improvements [Member] | OtherTransactionMember [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	46,000
Building [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	1,970
Building [Member] | BonnevilleTransactionMember [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	1,520
Building [Member] | OtherTransactionMember [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	450
Leasehold improvements [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	88
Leasehold improvements [Member] | BonnevilleTransactionMember [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	88
Leasehold improvements [Member] | OtherTransactionMember [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	0
Equipment [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	2,618
Equipment [Member] | BonnevilleTransactionMember [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	2,618
Equipment [Member] | OtherTransactionMember [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	0
Property Plant and Equipment Net Member [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	51,786
Property Plant and Equipment Net Member [Member] | BonnevilleTransactionMember [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	5,336
Property Plant and Equipment Net Member [Member] | OtherTransactionMember [Member]
Summary of the categories of property and equipment
Property Plant And Equipment Net	46,450
Radio Broadcasting Licences [Member]
IntangibleAssetsGrossExcludingGoodwillAbstract
Radio broadcasting licenses	136,014
Radio Broadcasting Licences [Member] | BonnevilleTransactionMember [Member]
IntangibleAssetsGrossExcludingGoodwillAbstract
Radio broadcasting licenses	136,014
Radio Broadcasting Licences [Member] | OtherTransactionMember [Member]
IntangibleAssetsGrossExcludingGoodwillAbstract
Radio broadcasting licenses	0
Other Intangibles
IntangibleAssetsGrossExcludingGoodwillAbstract
OtherIntangibleAssetsNet	1,947
Other Intangibles | BonnevilleTransactionMember [Member]
IntangibleAssetsGrossExcludingGoodwillAbstract
OtherIntangibleAssetsNet	1,947
Other Intangibles | OtherTransactionMember [Member]
IntangibleAssetsGrossExcludingGoodwillAbstract
OtherIntangibleAssetsNet	0
Goodwill [Member]
IntangibleAssetsGrossExcludingGoodwillAbstract
Goodwill	22,573
Goodwill [Member] | BonnevilleTransactionMember [Member]
IntangibleAssetsGrossExcludingGoodwillAbstract
Goodwill	22,573
Goodwill [Member] | OtherTransactionMember [Member]
IntangibleAssetsGrossExcludingGoodwillAbstract
Goodwill	$ 0