Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Trade and Barter Transactions Expenses (Detail)

v3.19.1
Summary of Significant Accounting Policies - Trade and Barter Transactions Expenses (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Revenue Recognition [Line Items]    
Total revenue $ 262,783 $ 263,736
Broadcast [Member] | Advertising Barter Transactions [Member]    
Revenue Recognition [Line Items]    
Total revenue 6,702 5,858
Cost 6,161 5,575
Digital Media [Member]    
Revenue Recognition [Line Items]    
Total revenue 42,595  
Digital Media [Member] | Advertising Barter Transactions [Member]    
Revenue Recognition [Line Items]    
Total revenue 124 30
Cost 3  
Publishing [Member]    
Revenue Recognition [Line Items]    
Total revenue 21,686  
Publishing [Member] | Advertising Barter Transactions [Member]    
Revenue Recognition [Line Items]    
Total revenue 11 51
Cost $ 20 $ 100