v3.19.1
ASSETS HELD FOR SALE (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2016
Dec. 31, 2018
Assets Held-for-sale, at Carrying Value1 [Abstract]        
GainLossOnSaleOfProperties $ 4,500      
IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems        
Revenues 309,005 $ 300,560    
Net Revenues 0 0 $ 0  
Station operating expenses 0 0 0  
Depreciation and amortization 0 0 0  
TBA income 0 (415) 0  
Total Operating Expenses 0 0 0  
Income before taxes 0 415 0  
Tax Expense attributable to Discontinued Operations 0 87 0  
Income from Discontinued Operations, Net of Tax 0 $ 328 $ 0  
Summary of the categories of property and equipment        
Property Plant And Equipment Net 327,901     $ 317,030
IntangibleAssetsGrossExcludingGoodwillAbstract        
Net Assets Held for Sale 22,795     19,603
Goodwill 534,607     539,469
IntangibleAssetsNetIncludingGoodwill 21,997     0
CumulusTransactionMember [Member]        
IntangibleAssetsGrossExcludingGoodwillAbstract        
Net Assets Held for Sale 22,795     0
IntangibleAssetsNetIncludingGoodwill 21,997     0
OtherTransactionMember [Member]        
IntangibleAssetsGrossExcludingGoodwillAbstract        
Net Assets Held for Sale 0     19,603
IntangibleAssetsNetIncludingGoodwill 0     0
Land and Land Improvements [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 401     2,645
Land and Land Improvements [Member] | CumulusTransactionMember [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 401     0
Land and Land Improvements [Member] | OtherTransactionMember [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 0     2,645
Building [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 8     1,053
Building [Member] | CumulusTransactionMember [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 8     0
Building [Member] | OtherTransactionMember [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 0     1,053
Leasehold improvements [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 0     0
Leasehold improvements [Member] | CumulusTransactionMember [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 0     0
Leasehold improvements [Member] | OtherTransactionMember [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 0     0
Equipment [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 389     15,905
Equipment [Member] | CumulusTransactionMember [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 389     0
Equipment [Member] | OtherTransactionMember [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 0     15,905
Property Plant and Equipment Net Member [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 798     19,603
Property Plant and Equipment Net Member [Member] | CumulusTransactionMember [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 798     0
Property Plant and Equipment Net Member [Member] | OtherTransactionMember [Member]        
Summary of the categories of property and equipment        
Property Plant And Equipment Net 0     19,603
Radio Broadcasting Licences [Member]        
IntangibleAssetsGrossExcludingGoodwillAbstract        
Radio broadcasting licenses 17,135     0
Radio Broadcasting Licences [Member] | CumulusTransactionMember [Member]        
IntangibleAssetsGrossExcludingGoodwillAbstract        
Radio broadcasting licenses 17,135     0
Radio Broadcasting Licences [Member] | OtherTransactionMember [Member]        
IntangibleAssetsGrossExcludingGoodwillAbstract        
Radio broadcasting licenses 0     0
Other Intangibles        
IntangibleAssetsGrossExcludingGoodwillAbstract        
OtherIntangibleAssetsNet 0     0
Other Intangibles | CumulusTransactionMember [Member]        
IntangibleAssetsGrossExcludingGoodwillAbstract        
OtherIntangibleAssetsNet 0     0
Other Intangibles | OtherTransactionMember [Member]        
IntangibleAssetsGrossExcludingGoodwillAbstract        
OtherIntangibleAssetsNet 0     0
Goodwill [Member]        
IntangibleAssetsGrossExcludingGoodwillAbstract        
Goodwill 4,862     0
Goodwill [Member] | CumulusTransactionMember [Member]        
IntangibleAssetsGrossExcludingGoodwillAbstract        
Goodwill 4,862     0
Goodwill [Member] | OtherTransactionMember [Member]        
IntangibleAssetsGrossExcludingGoodwillAbstract        
Goodwill $ 0     $ 0