v3.8.0.1
ACQUISITIONS, DIVESTITURES AND PRO FORMA SUMMARY (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Nov. 17, 2017
Jan. 06, 2017
CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Unaudited Pro Forma Summary Of Financial Information                          
ProFormaWeightedAverageSharesOutstandingDiluted                 141,790,000 139,908,000 39,038,000    
WeightedAverageBasicSharesOutstandingProForma                 140,298,000 139,908,000 38,084,000    
Income (Loss) from Continuing Operations, Per Outstanding Share, Total                 $ 3.01 $ (4.2) $ 0.81    
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share                 0.01 0 0    
Income (Loss) from Continuing Operations, Per Diluted Share                 3.02 (4.2) 0.79    
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share                 $ 0.01 $ 0 $ 0    
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest                 $ 422,901 $ (587,393) $ 33,050    
Income Loss From Discontinued Operations Net Of Tax                 836 0 0    
Payments to Acquire Businesses, Gross                 24,000 92 83,553    
Total intangible assets                 17,174 0      
Property, Plant and Equipment, Gross $ 461,131       $ 187,796       461,131 187,796      
Property Plant And Equipment Net 346,507       63,375       346,507 63,375      
Depreciation                 13,215 8,689 7,419    
AssetRetirementObligation 1,714       1,044       1,714 1,044 569    
Merger and acquisition costs $ 41,313       $ 708       41,313 708 3,978    
Merger and acquisition costs and restructuring charges                 41,313 708 3,978    
Restructuring Charges                 13,962 0 2,858    
Transition Services Costs                 2,960 0 0    
Other Restructuring Costs                 147 0 0    
Total Restructuring Charge and Transition Services                 16,922 0 2,858    
Lease Abandonment Costs                 2,874 0 687    
Changes in Estimates                 0 0 (13)    
Workforce Reduction                 10,441 0 1,538    
Costs to Exit Duplicative Contracts                 500 0 646    
Net revenues                 1,580,934 1,656,123 442,485    
Net income                 $ 423,737 $ (587,393) $ 33,050    
Net income per common share - basic                 $ 3.01 $ (4.21) $ 0.81    
Net income per common share - diluted                 $ 3.01 $ (4.21) $ 0.79    
Net income, available to common shareholders                 $ 421,722 $ (589,294) $ 30,850    
Income (Loss) from Continuing Operations, Per Outstanding Share, Total $ 2.63 $ 0.11 $ 0.16 $ (0.24) $ 0.3 $ 0.3 $ 0.28 $ 0.11 $ 4.49 $ 0.94 $ 0.75    
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share 0.01 0 0 0 0 0 0 0 0.02 0 0    
Income (Loss) from Continuing Operations, Per Diluted Share 2.58 0.28 0.26 0.11 0.28 0.28 0.26 0.11 4.37 0.91 0.73    
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share $ 0.01 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0.02 $ 0 $ 0    
Weighted Average Number Of Shares Outstanding Basic 88,309,000 38,955,000 38,945,000 38,910,000 38,561,000 38,485,000 38,469,000 38,448,000 51,392,899 38,500,495 38,083,947    
Weighted Average Number Of Diluted Shares Outstanding 89,887,000 39,728,000 39,656,000 38,910,000 39,800,000 41,433,000 41,130,000 39,260,000 55,678,189 39,568,062 39,037,623    
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest $ 231,829 $ 4,100 $ 6,414 $ (9,331) $ 11,399 $ 11,420 $ 10,834 $ 4,412 $ 233,013 $ 38,065 $ 29,184    
Income Loss From Discontinued Operations Net Of Tax 836 $ 0 $ 0 $ 0 0 $ 0 $ 0 $ 0 836 0 $ 0    
Acquisition Price Paid Using Convertible Preferred Stock 0       27,500       0 27,500      
Equipment [Member]                          
Purchase price allocation [Abstract]                          
Property, Plant and Equipment, Gross 204,789       112,362       $ 204,789 112,362      
Equipment [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 40 years        
Equipment [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 3 years        
Building [Member]                          
Purchase price allocation [Abstract]                          
Property, Plant and Equipment, Gross 40,925       22,698       $ 40,925 22,698      
Building [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 40 years        
Building [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 20 years        
LFM [Member]                          
Acquisition [Line Items]                          
Acquisition price paid from borrowing         42,000         42,000      
Purchases of radio station assets         (77,500)         (77,500)      
Purchase price allocation [Abstract]                          
Total tangible assets                 $ 18,175        
Total intangible assets                 87,539        
Total assets 120,863               120,863        
Net assets acquired 113,390               113,390        
Total current assets 15,149               15,149        
Total current liabilities 4,201               4,201        
Total liabilities acquired 7,473               $ 7,473        
Unaudited Pro Forma Summary Of Financial Information                          
Acquisition Price Paid Using Convertible Preferred Stock         27,500         27,500      
Aquisition Related Working Capital Reimbursement         11,000         11,000      
Aquisition Related Working Capital Credit         2,700         2,700      
Aquisition Purchase Price Total         105,000         105,000      
Discount Rates                 9.60%        
LFM [Member] | Cash [Member]                          
Purchase price allocation [Abstract]                          
Total current assets 2,246               $ 2,246        
LFM [Member] | Accounts Receivable [Member]                          
Purchase price allocation [Abstract]                          
Total current assets 11,933               11,933        
LFM [Member] | Prepaid Expenses And Other Current Assets [Member]                          
Purchase price allocation [Abstract]                          
Total current assets 970               $ 970        
LFM [Member] | Maximum [Member]                          
Unaudited Pro Forma Summary Of Financial Information                          
Fair Value Inputs Long Term Revenue Growth Rate                 1.50%        
LFM [Member] | Minimum [Member]                          
Unaudited Pro Forma Summary Of Financial Information                          
Fair Value Inputs Long Term Revenue Growth Rate                 1.00%        
LFM [Member] | Unfavorable lease liability [Member]                          
Purchase price allocation [Abstract]                          
Total current liabilities 3,272               $ 3,272        
LFM [Member] | Accrued Liabilities [Member]                          
Purchase price allocation [Abstract]                          
Total current liabilities 3,466               3,466        
LFM [Member] | Accounts Payable [Member]                          
Purchase price allocation [Abstract]                          
Total current liabilities 723               723        
LFM [Member] | Liability [Member]                          
Purchase price allocation [Abstract]                          
Total current liabilities 12               12        
LFM [Member] | Leasehold improvements [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 $ 973        
LFM [Member] | Leasehold improvements [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 11 years        
LFM [Member] | Leasehold improvements [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 2 years        
LFM [Member] | Furniture and equipment [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 $ 29        
LFM [Member] | Furniture and equipment [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 5 years        
LFM [Member] | Furniture and equipment [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 5 years        
LFM [Member] | Equipment [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 $ 8,651        
LFM [Member] | Equipment [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 40 years        
LFM [Member] | Equipment [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 3 years        
LFM [Member] | Land and Land Improvements [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 $ 87        
LFM [Member] | Land and Land Improvements [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 15 years        
LFM [Member] | Land and Land Improvements [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 15 years        
LFM [Member] | Land [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 $ 7,368        
LFM [Member] | Building [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 $ 1,067        
LFM [Member] | Building [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 25 years        
LFM [Member] | Building [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 15 years        
LFM [Member] | Radio Broadcasting Licences [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 $ 79,209        
LFM [Member] | Goodwill [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 4,594        
LFM [Member] | Assets Held For Sale [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 1,885        
LFM [Member] | Lease Agreements [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 $ 487        
LFM [Member] | Lease Agreements [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 5 years        
LFM [Member] | Lease Agreements [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 1 year        
LFM [Member] | Other Noncurrent Assets [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 $ 1,364        
BonnevilleSwap [Member]                          
Acquisition [Line Items]                          
Net time brokerage agreement (income) fees         $ 300         300      
Purchase price allocation [Abstract]                          
Total tangible assets                 1,133        
Total intangible assets                 53,326        
Total assets 59,323               59,323        
Net assets acquired 59,000               $ 59,000        
Unaudited Pro Forma Summary Of Financial Information                          
Fair Value Inputs Long Term Revenue Growth Rate                 1.00%        
Discount Rates                 9.20%        
BonnevilleSwap [Member] | Accounts Receivable [Member]                          
Purchase price allocation [Abstract]                          
Total current assets 4,864               $ 4,864        
BonnevilleSwap [Member] | Unfavorable lease liability [Member]                          
Purchase price allocation [Abstract]                          
Other long-term liabilities $ 323               $ 323        
BonnevilleSwap [Member] | Unfavorable lease liability [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 4 years        
BonnevilleSwap [Member] | Unfavorable lease liability [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 1 year        
BonnevilleSwap [Member] | Furniture and equipment [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 $ 121        
BonnevilleSwap [Member] | Furniture and equipment [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 5 years        
BonnevilleSwap [Member] | Furniture and equipment [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 5 years        
BonnevilleSwap [Member] | Equipment [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 $ 1,012        
BonnevilleSwap [Member] | Equipment [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 15 years        
BonnevilleSwap [Member] | Equipment [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 3 years        
BonnevilleSwap [Member] | Radio Broadcasting Licences [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 $ 53,057        
BonnevilleSwap [Member] | Goodwill [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 266        
BonnevilleSwap [Member] | Advertiser lists and customer relationships [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 $ 1        
BonnevilleSwap [Member] | Advertiser lists and customer relationships [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 3 years        
BonnevilleSwap [Member] | Advertiser lists and customer relationships [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 3 years        
BonnevilleSwap [Member] | Trademarks [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 $ 2        
BonnevilleSwap [Member] | Trademarks [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 5 years        
BonnevilleSwap [Member] | Trademarks [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 5 years        
KRWZAM [Member]                          
Unaudited Pro Forma Summary Of Financial Information                          
Expected gain on sale of station                   300      
ProceedsFromDivestitureOfBusinesses                   $ 3,800      
Charlotte [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Unaudited Pro Forma Summary Of Financial Information                          
Fair Value Inputs Long Term Revenue Growth Rate                 1.00%        
Discount Rates                 9.00%        
Charlotte [Member]                          
Purchase price allocation [Abstract]                          
Total assets                         $ 24,996
Net assets acquired                         24,000
Total liabilities acquired                         996
Property, Plant and Equipment, Gross                         7,325
Charlotte [Member] | Unfavorable lease liability [Member]                          
Purchase price allocation [Abstract]                          
Total current liabilities                         735
Charlotte [Member] | OtherNoncurrentLiabilitiesMember                          
Purchase price allocation [Abstract]                          
Other long-term liabilities                         261
Charlotte [Member] | Equipment [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 $ 4,569        
Charlotte [Member] | Equipment [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 40 years        
Charlotte [Member] | Equipment [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 3 years        
Charlotte [Member] | Land [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 $ 2,539        
Charlotte [Member] | Building [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 $ 217        
Charlotte [Member] | Building [Member] | Maximum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 25 years        
Charlotte [Member] | Building [Member] | Minimum [Member]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 15 years        
Charlotte [Member] | Radio Broadcasting Licences [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 $ 17,384        
Charlotte [Member] | Other Noncurrent Assets [Member]                          
Purchase price allocation [Abstract]                          
Intangible assets non amortizable                         $ 287
CBS Radio [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 3,002,094        
Total assets                       $ 3,540,159  
Net assets acquired                       1,168,848  
Total current assets                       273,683  
Total current liabilities                       132,518  
Total liabilities acquired                       2,371,311  
Property, Plant and Equipment, Gross                       264,382  
Unaudited Pro Forma Summary Of Financial Information                          
Revenues from continuing operations earned from Acquiree                 133,600        
Income befoer taxes earned from acquiree                 $ 21,400        
CBS Radio [Member] | CurrentLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total liabilities acquired                       13,859  
CBS Radio [Member] | CurrentLiabilitiesDomain [Domain] | Unfavorable lease Liabilities Member [Member]                          
Purchase price allocation [Abstract]                          
Total liabilities acquired                       12,770  
CBS Radio [Member] | CurrentLiabilitiesDomain [Domain] | Unfavorable contracts Member [Member]                          
Purchase price allocation [Abstract]                          
Total liabilities acquired                       22,597  
CBS Radio [Member] | CurrentLiabilitiesDomain [Domain] | Noncurrent Portion of Long Term Debt Member [Member]                          
Purchase price allocation [Abstract]                          
Total liabilities acquired                       1,376,900  
CBS Radio [Member] | CurrentLiabilitiesDomain [Domain] | Deferred Tax Liability Member [Member]                          
Purchase price allocation [Abstract]                          
Total liabilities acquired                       780,832  
CBS Radio [Member] | Accrued Compensation Member [Member] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total current liabilities                       26,324  
CBS Radio [Member] | Current Portion of Long Term Debt Member [Member] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total current liabilities                       10,600  
CBS Radio [Member] | Current portion of unfavorable contracts Member [Member] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total current liabilities                       4,803  
CBS Radio [Member] | Accrued interest member [Member] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total current liabilities                       4,529  
CBS Radio [Member] | Current Portion of Unearned Revenue Member [Member] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total current liabilities                       14,971  
CBS Radio [Member] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total current liabilities                       36,137  
CBS Radio [Member]                          
Unaudited Pro Forma Summary Of Financial Information                          
Fair Value Inputs Long Term Revenue Growth Rate                 1.00%        
Discount Rates                 9.00%        
Shares Issued Pursuant to Acquisition                 101,407,494        
CBS Radio [Member] | AccruedExpensesMember [Member] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total current liabilities                       35,154  
CBS Radio [Member] | Accounts Receivable [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total current assets                       241,548  
CBS Radio [Member] | Prepaid contracts member [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total current assets                       4,160  
CBS Radio [Member] | PrepaidExpensesMember [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total current assets                       20,625  
CBS Radio [Member] | OtherCurrentAssetsMember | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total current assets                       7,350  
CBS Radio [Member] | Maximum [Member] | CurrentLiabilitiesDomain [Domain] | Noncurrent Portion of Long Term Debt Member [Member]                          
Purchase price allocation [Abstract]                          
Intangible assets amortization period                 7 years        
CBS Radio [Member] | Minimum [Member] | CurrentLiabilitiesDomain [Domain] | Noncurrent Portion of Long Term Debt Member [Member]                          
Purchase price allocation [Abstract]                          
Intangible assets amortization period                 5 years        
CBS Radio [Member] | OtherNoncurrentLiabilitiesMember | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total liabilities acquired                       31,835  
CBS Radio [Member] | Leasehold improvements [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Property, Plant and Equipment, Gross                       36,029  
CBS Radio [Member] | Furniture and equipment [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Property, Plant and Equipment, Gross                       4,080  
CBS Radio [Member] | Furniture and equipment [Member] | Maximum [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 7 years        
CBS Radio [Member] | Furniture and equipment [Member] | Minimum [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 7 years        
CBS Radio [Member] | Equipment [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Property, Plant and Equipment, Gross                       81,407  
CBS Radio [Member] | Equipment [Member] | Maximum [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 23 years        
CBS Radio [Member] | Equipment [Member] | Minimum [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 3 years        
CBS Radio [Member] | Land and Land Improvements [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Property, Plant and Equipment, Gross                       1,348  
CBS Radio [Member] | Land and Land Improvements [Member] | Maximum [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 10 years        
CBS Radio [Member] | Land and Land Improvements [Member] | Minimum [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 10 years        
CBS Radio [Member] | Land [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Property, Plant and Equipment, Gross                       112,880  
CBS Radio [Member] | Building [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Property, Plant and Equipment, Gross                       14,040  
CBS Radio [Member] | Building [Member] | Maximum [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 25 years        
CBS Radio [Member] | Building [Member] | Minimum [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Tangible assets amortization period                 25 years        
CBS Radio [Member] | ConstructionInProgressMember | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Property, Plant and Equipment, Gross                       14,598  
CBS Radio [Member] | Radio Broadcasting Licences [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Intangible assets non amortizable                       1,880,400  
CBS Radio [Member] | Goodwill [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Intangible assets non amortizable                       820,961  
CBS Radio [Member] | Advertiser lists and customer relationships [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Intangible assets amortizable                       27,453  
CBS Radio [Member] | Advertiser lists and customer relationships [Member] | Maximum [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Intangible assets amortization period                 5 years        
CBS Radio [Member] | Advertiser lists and customer relationships [Member] | Minimum [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Intangible assets amortization period                 5 years        
CBS Radio [Member] | Assets Held For Sale [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total assets                       255,650  
CBS Radio [Member] | Lease Agreements [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total assets                       16,580  
CBS Radio [Member] | Other Noncurrent Assets [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Total assets                       1,050  
CBS Radio [Member] | Other Noncurrent Assets [Member] | Maximum [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Intangible assets amortization period                 40 years        
CBS Radio [Member] | Other Noncurrent Assets [Member] | Minimum [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Purchase price allocation [Abstract]                          
Intangible assets amortization period                 3 years        
Beasley Transatcion - CBS Radio Merger | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Acquired Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 $ 36,233        
Net assets acquired                       48,900  
Unaudited Pro Forma Summary Of Financial Information                          
Cash Acquired in Excess of Payments to Acquire Business                 12,000        
Beasley Transatcion - CBS Radio Merger | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Disposed Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 48,093        
Net assets acquired                       48,900  
Unaudited Pro Forma Summary Of Financial Information                          
Cash Acquired in Excess of Payments to Acquire Business                 0        
Beasley Transatcion - CBS Radio Merger | OtherCurrentAssetsMember | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Acquired Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 0        
Beasley Transatcion - CBS Radio Merger | OtherCurrentAssetsMember | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Disposed Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 267        
Beasley Transatcion - CBS Radio Merger | Total Tangible Property Member [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Acquired Member [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 667        
Beasley Transatcion - CBS Radio Merger | Total Tangible Property Member [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Disposed Member [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 807        
Beasley Transatcion - CBS Radio Merger | Radio Broadcasting Licences [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Acquired Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 35,944        
Beasley Transatcion - CBS Radio Merger | Radio Broadcasting Licences [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Disposed Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 35,944        
Beasley Transatcion - CBS Radio Merger | Goodwill [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Acquired Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 289        
Beasley Transatcion - CBS Radio Merger | Goodwill [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Disposed Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 $ 11,882        
i Heart Media Transaction - CBS Radio Merger | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Unaudited Pro Forma Summary Of Financial Information                          
Fair Value Inputs Long Term Revenue Growth Rate                 1.00%        
Discount Rates                 9.00%        
i Heart Media Transaction - CBS Radio Merger | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Acquired Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 $ 63,627        
Net assets acquired                       71,300  
i Heart Media Transaction - CBS Radio Merger | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Disposed Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 63,151        
Net assets acquired                       71,300  
i Heart Media Transaction - CBS Radio Merger | CurrentLiabilitiesDomain [Domain] | Unfavorable lease Liabilities Member [Member] | Assets Acquired Member [Member]                          
Purchase price allocation [Abstract]                          
Total liabilities acquired                       1,301  
i Heart Media Transaction - CBS Radio Merger | CurrentLiabilitiesDomain [Domain] | Unfavorable lease Liabilities Member [Member] | Assets Disposed Member [Member]                          
Purchase price allocation [Abstract]                          
Total liabilities acquired                       0  
i Heart Media Transaction - CBS Radio Merger | CurrentLiabilitiesDomain [Domain] | Deferred Tax Liability Member [Member] | Assets Acquired Member [Member]                          
Purchase price allocation [Abstract]                          
Total liabilities acquired                       4,751  
i Heart Media Transaction - CBS Radio Merger | CurrentLiabilitiesDomain [Domain] | Deferred Tax Liability Member [Member] | Assets Disposed Member [Member]                          
Purchase price allocation [Abstract]                          
Total liabilities acquired                       $ 0  
i Heart Media Transaction - CBS Radio Merger | Total Tangible Property Member [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Acquired Member [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 13,725        
i Heart Media Transaction - CBS Radio Merger | Total Tangible Property Member [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Disposed Member [Member]                          
Purchase price allocation [Abstract]                          
Total tangible assets                 8,149        
i Heart Media Transaction - CBS Radio Merger | Radio Broadcasting Licences [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Acquired Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 50,621        
i Heart Media Transaction - CBS Radio Merger | Radio Broadcasting Licences [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Disposed Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 56,299        
i Heart Media Transaction - CBS Radio Merger | Goodwill [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Acquired Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 11,700        
i Heart Media Transaction - CBS Radio Merger | Goodwill [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Disposed Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 6,852        
i Heart Media Transaction - CBS Radio Merger | Advertiser lists and customer relationships [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Acquired Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 1,041        
i Heart Media Transaction - CBS Radio Merger | Advertiser lists and customer relationships [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Disposed Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 0        
i Heart Media Transaction - CBS Radio Merger | Acquired advertising contracts [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Acquired Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 265        
i Heart Media Transaction - CBS Radio Merger | Acquired advertising contracts [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain] | Assets Disposed Member [Member]                          
Purchase price allocation [Abstract]                          
Total intangible assets                 0        
EMF Sale [Member] | CurrentLiabilitiesDomain [Domain] | LongTermLiabilitiesDomain [Domain]                          
Unaudited Pro Forma Summary Of Financial Information                          
Expected gain on sale of station                 2,500        
ProceedsFromDivestitureOfBusinesses                 $ 57,800