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
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 24, 2021
Sep. 10, 2021
Jul. 31, 2021
Jul. 01, 2021
Feb. 05, 2020
Sep. 30, 2021
Sep. 30, 2021
Sep. 30, 2020
Mar. 31, 2021
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                    
Principal repurchased   $ 4,700                
Cash paid   4,700                
Net gain   $ 56                
Debt instrument, interest rate   6.75%                
Proceeds from Sale of Productive Assets               $ 15,771 $ 188  
Debt Issuance Costs, Net     $ 4,200              
Debt Conversion, Converted Instrument, Rate 7.125%                  
Gain (loss) on the early retirement of long-term debt       $ 11,200     $ (56) (56) $ 49  
PPP Loan [Member]                    
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                    
Debt Instrument, Maturity Date         Jul. 30, 2021          
Gain (loss) on the early retirement of long-term debt         $ 11,200          
Payroll Protection Plans [Member]                    
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                    
Long-term Debt, Gross                   $ 11,200
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           300 300    
Small Business Association [member]                    
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                    
Long-term Debt, Gross                   $ 11,200
2024 Notes [member]                    
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                    
Principal repurchased   $ 4,700                
Cash paid   4,700                
Net gain   $ 56,000                
Long-term Debt, Gross 98,800           98,800 98,800    
Debt Instrument, Face Amount $ 112,800   112,800       $ 112,800 112,800    
Debt Conversion, Converted Instrument, Amount     112,800         112,800    
Debt Issuance Costs, Net     $ 1,100              
2028 Notes [member]                    
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                    
Debt Instrument, Maturity Date     Jun. 01, 2028              
Debt Conversion, Converted Instrument, Amount     $ 114,700         114,700    
Debt Issuance Costs, Net     3,000              
Deferred withdrawn amount     $ 800              
Debt Conversion, Converted Instrument, Rate     7.125%              
Purchase Obligation     $ 50,000              
Percentage of call premium     1.688%              
2028 Notes [member] | Operating Expense [Member]                    
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                    
Third party debt modification costs     $ 2,300              
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