Quarterly report pursuant to Section 13 or 15(d)

Goodwill - Fair Value Measurement Inputs and Valuation Techniques For Goodwill (Detail)

v3.23.3
Goodwill - Fair Value Measurement Inputs and Valuation Techniques For Goodwill (Detail)
Sep. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Measurement Input Risk Adjusted Discount Rate [Member] | Digital Media Enterprise Valuations [Member]      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Intangible asset measurement input percentage 11 10.5 10.5
Measurement Input Risk Adjusted Discount Rate [Member] | Publishing Enterprise Valuations [Member]      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Intangible asset measurement input percentage 11   10.5
Measurement Input, Long-term Revenue Growth Rate [Member] | Radio Clusters [Member] | Digital Media Enterprise Valuations [Member]      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Intangible asset measurement input percentage 0.5 0.6 0.6
Measurement Input, Long-term Revenue Growth Rate [Member] | Radio Clusters [Member] | Publishing Enterprise Valuations [Member]      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Intangible asset measurement input percentage 0.5   0.5
Minimum [Member] | Measurement Input Operating Profit Margin [Member] | Radio Clusters [Member] | Digital Media Enterprise Valuations [Member]      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Intangible asset measurement input percentage (13.6) (1.5) 0.9
Minimum [Member] | Measurement Input Operating Profit Margin [Member] | Radio Clusters [Member] | Publishing Enterprise Valuations [Member]      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Intangible asset measurement input percentage (17.9)   (9)
Maximum [Member] | Measurement Input Operating Profit Margin [Member] | Radio Clusters [Member] | Digital Media Enterprise Valuations [Member]      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Intangible asset measurement input percentage 21 3 5.3
Maximum [Member] | Measurement Input Operating Profit Margin [Member] | Radio Clusters [Member] | Publishing Enterprise Valuations [Member]      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Intangible asset measurement input percentage 2.4   4.9