Annual report pursuant to Section 13 and 15(d)

Recent Transactions - Divestitures - Additional Information (Detail)

v3.22.0.1
Recent Transactions - Divestitures - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Nov. 30, 2021
Jul. 27, 2021
Jul. 23, 2021
May 25, 2021
Mar. 18, 2021
Feb. 05, 2020
Sep. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                  
Proceeds from sale of productive assets               $ 29,278 $ 189
Gain (loss) on disposition of assets       $ 500          
Deferred income taxes       400       $ 67,012 $ 68,883
Local Marketing Agreement [Member]                  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                  
Debt Instrument, Maturity Date, Description               one year  
Hilary Kramer Financial Newsletter [Member]                  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                  
Proceeds from sale of property, plant, and equipment   $ 200              
Gain (Loss) on Disposition of Property Plant Equipment   $ 100              
Thirty Four Acres land [Member]                  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                  
Proceeds from sale of property, plant, and equipment     $ 12,100            
Gain (Loss) on Disposition of Property Plant Equipment     $ 10,500            
Radio Stations [Member]                  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                  
Proceeds from sale of productive assets           $ 4,000   $ 3,200  
Pretax loss on sale of assets             $ 1,400 $ 400  
Radio Stations [Member] | FM Translators [Member]                  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                  
Proceeds from sale of productive assets         $ 3,500        
Singing News Magazine And Singing News Radio [Member]                  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                  
Proceeds from sale of productive assets       $ 100          
FLORIDA | Agreement Seventy Seven Acres Of Land [Member]                  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                  
Gain (Loss) on Disposition of Property Plant Equipment $ 12,900                
Proceeds from Sale of Real Estate $ 13,500