Annual report pursuant to Section 13 and 15(d)

Related Party Transactions - Additional Information (Detail)

v3.19.1
Related Party Transactions - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Sep. 11, 2018
Nov. 22, 2017
Dec. 31, 2018
Dec. 31, 2017
Related Party Transaction [Line Items]        
Description of related party transaction     Related parties include our directors, executive officers, nominees to become a director, any person beneficially owning more than 5% of any class of our stock, immediate family members of any of the foregoing, and any entity in which any of the foregoing persons is employed or is a general partner or principal or in which the person has a 10% or greater beneficial ownership interest. The policy covers material transactions in which a related party had, has or will have a direct or indirect interest.  
Business combination, consideration transferred     $ 11,180,000 $ 4,043,000
Operating leases, rent expense     15,400,000 15,500,000
Related party annual payments for insurance premiums     386,000 386,000
Net assets     3,100,000 2,800,000
Split Dollar Life Insurance [Member]        
Related Party Transaction [Line Items]        
Business combination, consideration transferred     1,800,000 1,400,000
Chief Executive Officer [Member] | Trust [Member]        
Related Party Transaction [Line Items]        
Operating leases, rent expense     197,000 191,000
AM 570 LLC [Member]        
Related Party Transaction [Line Items]        
Business combination, consideration transferred   $ 600,000    
Delmarva Educational Association Corporation [Member]        
Related Party Transaction [Line Items]        
Business combination, consideration transferred       21,000
Edward G Atsinger III Chief Executive Officer And Director [Member]        
Related Party Transaction [Line Items]        
Operating leases, rent expense     198,000 217,000
KTRB-AM [Member]        
Related Party Transaction [Line Items]        
Business combination, consideration transferred $ 5,100,000      
Business Acquisition, asset purchase cost capitalized $ 200,000      
Easy Bay Broadcasting [Member]        
Related Party Transaction [Line Items]        
Business combination, consideration transferred     400,000 500,000
Chairman And Chief Executive Officer [Member] | Land and Building [Member]        
Related Party Transaction [Line Items]        
Operating leases, rent expense     1,500,000 1,500,000
Truth for Life [Member]        
Related Party Transaction [Line Items]        
Related party transaction, other revenues from transactions with related party     2,400,000 2,100,000
Accounts receivable, related parties     200,000 200,000
Know the Truth [Member]        
Related Party Transaction [Line Items]        
Related party transaction, other revenues from transactions with related party     1,400,000 1,200,000
Accounts receivable, related parties     1,100,000 700,000
The Truth Network [Member]        
Related Party Transaction [Line Items]        
Accounts receivable, related parties     7,000 3,000
Related party transaction, amounts of transaction     15,000 11,000
Oaks Christian School [Member]        
Related Party Transaction [Line Items]        
Accounts receivable, related parties     9,000  
Related party transaction, amounts of transaction     $ 32,000 $ 5,000