Annual report pursuant to Section 13 and 15(d)

Recent Transactions - Pending Transactions -Additional Information (Detail)

v3.22.4
Recent Transactions - Pending Transactions -Additional Information (Detail) - USD ($)
$ in Millions
Feb. 01, 2023
Jan. 10, 2023
Jan. 06, 2023
Dec. 20, 2022
Sep. 29, 2022
Sep. 22, 2022
Aug. 01, 2022
George Gilder Report and other digital newsletters and related website assets [Member]              
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]              
Percentage of Purchase Price On Net Revenue       25.00%      
George Gilder Report and other digital newsletters and related website assets [Member] | Subsequent Event [Member]              
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]              
Percentage of Purchase Price On Net Revenue 25.00%            
Radio station K S K Y A M [Member] | WASHINGTON              
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]              
Proceeds from sale of real estate             $ 0.7
Radio Station WWFEAM WRHCAM And Two FM Translator In Miami [Member]              
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]              
Escrow Deposit         $ 0.3    
Proceeds from sale of real estate         5.0    
Radio Station WWFEAM WRHCAM And Two FM Translator In Miami [Member] | FLORIDA              
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]              
Proceeds from sale of real estate           $ 5.0  
WMYMAMand an FM translator [Member]              
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]              
Payments to Acquire Businesses, Gross         $ 3.2 $ 3.0  
WMYMAMand an FM translator [Member] | Land [Member] | Subsequent Event [Member]              
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]              
Related Party Transaction, Amounts of Transaction   $ 2.0 $ 1.8