Quarterly report pursuant to Section 13 or 15(d)

Recent Transactions - Divestitures - Additional Information (Detail)

v3.20.2
Recent Transactions - Divestitures - Additional Information (Detail) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Apr. 06, 2020
Feb. 05, 2020
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]          
Proceeds from sale of intangible assets     $ 188 $ 2,872  
Radio Stations [Member]          
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]          
Proceeds from sale of intangible assets $ 200 $ 4,000      
Pretax loss on sale of assets         $ 1,500