Annual report pursuant to Section 13 and 15(d)

Broadcast Licenses - Fair Value Measurement Inputs and Valuation Techniques for Broadcast Licenses (Detail)

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Broadcast Licenses - Fair Value Measurement Inputs and Valuation Techniques for Broadcast Licenses (Detail) - Broadcast Licenses [Member] - Accounting
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Dec. 31, 2021
Measurement Input, Risk-adjusted Discount Rate [Member]        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Intangible asset measurement input percentage 9.5 9.5 9.5 8.5
Minimum [Member] | Measurement Input, Operating Profit Margin [Member]        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Intangible asset measurement input percentage 3.9 3.9 3.9 3.9
Minimum [Member] | Measurement Input, Long-term Revenue Growth Rate [Member]        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Intangible asset measurement input percentage 0.4 0.4 0.4 0.4
Maximum [Member] | Measurement Input, Operating Profit Margin [Member]        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Intangible asset measurement input percentage 30.4 30.9 30.9 30.9
Maximum [Member] | Measurement Input, Long-term Revenue Growth Rate [Member]        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Intangible asset measurement input percentage 0.8 0.7 0.7 0.7