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Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Thousands, shares in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2020
Dec. 31, 2021
Summary of Significant Accounting Policies [Line Items]      
Unearned revenue $ 18,183   $ 20,000
Programming assets, amortization expense, year five 23,600    
Unearned revenue recognized during the year 16,400    
Programming assets, amortization expense, next twelve months 149,900    
Programming assets, amortization expense, year two 106,100    
Programming assets, amortization expense, year three 64,800    
Programming assets, amortization expense, year four 45,300    
Programming assets, amortization expense, thereafter 11,300    
FCC repack receivable 0   773
Deferred FCC repack income 46,205   47,977
Estimated liabilities for unpaid claims $ 10,400   $ 10,200
Anti-dilutive securities (in shares) 0.1 0.4  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01      
Summary of Significant Accounting Policies [Line Items]      
Expected period of revenue recognition 12 months    
Other affiliation relationships      
Summary of Significant Accounting Policies [Line Items]      
Estimated useful life 20 years    
Customer lists and advertiser relationships      
Summary of Significant Accounting Policies [Line Items]      
Estimated useful life 20 years    
FCC licenses | Maximum      
Summary of Significant Accounting Policies [Line Items]      
FCC license term 8 years    
Revenue Benchmark | Advertising | Advertising      
Summary of Significant Accounting Policies [Line Items]      
Concentration risk, percentage 72.00%