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Other matters (Details)
$ in Millions
1 Months Ended 3 Months Ended
May 10, 2023
letter
lawsuit
Oct. 03, 2018
defendant
Jun. 30, 2022
USD ($)
Jan. 31, 2022
USD ($)
Dec. 31, 2021
agreement
Jun. 30, 2019
defendant
Dec. 13, 2018
defendant
Mar. 31, 2023
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Business Acquisition [Line Items]                    
Proceeds from maturity of debt securities available for sale     $ 3.0              
Intangible Contract Asset                    
Business Acquisition [Line Items]                    
Amount of intangible contract asset       $ 20.8            
Intangible asset useful life       2 years            
MadHive                    
Business Acquisition [Line Items]                    
Number of renewed existing commercial agreements | agreement         2          
Equity And Debt Investment | Affiliated Entity                    
Business Acquisition [Line Items]                    
Expenses incurred with related party               $ 25.1 $ 26.0  
Accounts payable and accrued liabilities with related party               $ 15.2   $ 10.0
Clay, Massey & Associates, P.C. v. Gray Television                    
Business Acquisition [Line Items]                    
Number of other broadcasters settling DOJ complaint (defendant) | defendant   16       4        
Settled litigation                    
Business Acquisition [Line Items]                    
Number of other broadcasters settling DOJ complaint (defendant) | defendant           4 7      
Pending Litigation | Merger Related Lawsuits | Subsequent Event                    
Business Acquisition [Line Items]                    
Number of lawsuit filed | lawsuit 7                  
Number of lawsuits voluntarily dismissed | lawsuit 1                  
Number of demand letter received | letter 4