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Investments - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Dec. 31, 2019
Sep. 19, 2019
Schedule Of Equity Method Investments [Line Items]        
Equity method investments, book value $ 1,308,794 $ 1,308,794 $ 1,471,866  
Cash distributions received   206,997    
Basis difference related to equity method investment $ 702,800 $ 702,800    
Tribune [Member]        
Schedule Of Equity Method Investments [Line Items]        
Weighted average remaining useful life of assets subjects to amortization of basis difference   6 years    
Tribune [Member] | Goodwill [Member]        
Schedule Of Equity Method Investments [Line Items]        
Equity method investment, basis difference amount       $ 500,400
Tribune [Member] | Amortizable Intangible Assets [Member]        
Schedule Of Equity Method Investments [Line Items]        
Equity method investment, basis difference amount       $ 853,200
TV Food Network [Member]        
Schedule Of Equity Method Investments [Line Items]        
Ownership stake 31.30% 31.30%    
Ownership interest in affiliate of partnership 68.70% 68.70%    
Equity method investments, book value $ 1,289,000 $ 1,289,000    
Cash distributions received $ 9,900 $ 207,000