Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.20.1
Summary of Significant Accounting Policies - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2019
USD ($)
Segments
shares
Dec. 31, 2018
USD ($)
shares
Jan. 01, 2019
USD ($)
Dec. 31, 2017
USD ($)
May 19, 2017
USD ($)
Summary Of Significant Accounting Policies [Line Items]          
Lease right of use assets $ 54,550,000   $ 65,000,000    
Operating lease liabilities 62,535,000   $ 74,400,000    
Interest Costs Capitalized 2,700,000 $ 2,100,000      
Capitalized computer software, amortization 2,600,000 2,800,000      
Impairment of intangible assets, finite-lived 0        
Carrying value of notes 219,800,000        
Debt related commitment fees and debt issuance costs 6,300,000        
Debt issuance costs, gross 800,000        
Increase in Valuation Allowance Deferred Tax Asset 7,600,000        
Deferred Tax Assets Valuation Allowance 12,977,000 5,371,000      
Business combination recognized identifiable assets increase or decrease 100,000 200,000      
Increase (Decrease) in contingent earn-out liabilities 41,000 $ 76,000      
Debt instrument, estimated fair value $ 203,900,000        
Option to purchase shares of common stock outstanding | shares 1,860,722 1,980,972      
Percentage of total revenue 35.30% 36.40%      
Self-insurance reserve $ 640,000 $ 828,000   $ 747,000  
Number of operating segments | Segments 3        
Cash payments for contingent earn-out consideration $ 0 100,000      
Estimated contingent earn-out 19,000 55,000      
Accounting Standards Update 2016-01 [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Liability recognised for Tax Position 200,000        
Combination of Seven Radio Station [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax 9,400,000        
Combination of Three Station [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax 4,700,000        
Washington radio stations [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax 3,800,000        
Florida radio stations [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax 1,600,000        
WBZW-AMFlorida radio stations [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax 1,500,000        
Combination of Two Station [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax 1,300,000        
MikeTurner [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax 200,000        
Human Event [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax 200,000        
MiamiFlorida [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax 400,000        
Newport Natural Health [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax $ 100,000        
Combination of nine radio station [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Number Of Radio Stations 9        
Combination of four radio station [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Number Of Radio Stations 4        
Asset-Based Revolving Credit Facility [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Carrying value of notes         $ 30,000,000
Senior Secured Debt [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Carrying value of notes         $ 255,000,000
Debt instrument, interest rate, stated percentage 6.75%       6.75%
Debt related commitment fees and debt issuance costs $ 900,000 900,000      
Production Costs [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Marketing and advertising expense $ 9,200,000 10,900,000      
Notes [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Debt instrument term 7 years        
Debt instrument, maturity date Jun. 01, 2024        
Miami [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax   $ 4,700,000      
Dallas TX [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Percentage of total revenue 20.40% 19.60%      
Omaha KGBI-FM [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax   $ 2,400,000      
Omaha KCRO-AM and KOTK-AM [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax   1,800,000      
Lakeside [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax   300,000      
Covina [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax   200,000      
Boston [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Discontinued operation, gain (loss) from disposal of discontinued operation, before income tax   $ 200,000      
Los Angeles CA [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Percentage of total revenue 15.00% 14.80%      
Debt Instrument Redemption Period One [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Debt instrument, redemption price, percentage of principal amount redeemed 100.00%        
Debt instrument, redemption, percentage of aggregate principal amount   100.00%      
Debt instrument, redemption period, start date Jun. 01, 2020        
Debt Instrument Redemption Period Two [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Debt instrument, redemption price, percentage of principal amount redeemed 106.75%        
Debt instrument, redemption period, end date Jun. 01, 2020        
Debt instrument, redemption, percentage of aggregate principal amount 35.00% 35.00%      
Debt Instrument Redemption Period Three [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Debt instrument, redemption price, percentage of principal amount redeemed 103.00%        
Debt instrument, redemption period, end date Jun. 01, 2020        
Debt instrument, redemption, percentage of aggregate principal amount 10.00% 106.75%      
Offset to Deferred Tax [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Increase in Valuation Allowance Deferred Tax Asset $ 13,000,000        
Standby Letters of Credit [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Line of credit facility, maximum borrowing capacity         $ 5,000,000
Swing Line Loans [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Line of credit facility, maximum borrowing capacity         $ 7,500,000