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Significant Accounting Policies - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Significant Accounting Policies [Line Items]      
Base subscription contract term 1 year    
Percentage of retail rate charges to affiliates 60.00%    
Provision for doubtful accounts receivable $ 4,391,000 $ 2,452,000 $ 3,030,000
Impairments on non-marketable investments 0 0 0
Depreciation expense 12,820,000 10,770,000 8,276,000
Goodwill 884,449,000 788,107,000 788,107,000
Impairment charge of indefinite lived intangible asset 0    
Impairment of long-lived assets hold for continued use 0 0 0
Impairment of long-lived assets hold for sale 0 0 0
Capitalized software costs 11,500,000 6,900,000 5,200,000
Advertising expense $ 109,200,000 104,600,000 97,100,000
Swap | Designated as Hedging Instrument | Cash Flow Hedging      
Significant Accounting Policies [Line Items]      
Fixed rate of interest 2.96%    
Notional amount $ 300,000,000    
TEGNA Inc      
Significant Accounting Policies [Line Items]      
Goodwill 884,000,000    
Investments and Other Assets      
Significant Accounting Policies [Line Items]      
Non-marketable investments 9,400,000 9,400,000  
Marketing and Sales      
Significant Accounting Policies [Line Items]      
Provision for doubtful accounts receivable $ 4,400,000 $ 2,500,000 $ 4,600,000