Quarterly report pursuant to Section 13 or 15(d)

Recent Transactions - Debt Transactions - Additional Information (Detail)

v3.21.2
Recent Transactions - Debt Transactions - Additional Information (Detail) - USD ($)
$ in Thousands
6 Months Ended
Mar. 18, 2021
Feb. 05, 2020
Jun. 30, 2021
Jun. 30, 2020
Jul. 31, 2021
Mar. 31, 2021
Dec. 31, 2020
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]              
Long-term Debt, Gross     $ 225,327       $ 218,764
Proceeds from Sale of Productive Assets     3,627 $ 188      
Debt Instrument, Face Amount     216,300        
Payroll Protection Plans [Member]              
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]              
Long-term Debt, Gross           $ 11,200  
Subsequent Event [Member] | Payroll Protection Plans [Member]              
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]              
Unforgiven loans payable         $ 20,000    
Local Marketing Agreement [member]              
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]              
Debt Instrument, Face Amount     $ 300        
Debt Instrument, Maturity Date, Description     one year        
Small Business Association [member]              
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]              
Long-term Debt, Gross           $ 11,200  
Debt Instrument, Interest Rate, Stated Percentage     1.00%        
Debt Instrument, Maturity Date, Description     five years        
Radio Stations [member]              
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]              
Proceeds from Sale of Productive Assets $ 3,500 $ 4,000 $ 3,200