Quarterly report pursuant to Section 13 or 15(d)

Goodwill - Additional Information (Detail)

v3.20.2
Goodwill - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Impairment of goodwill $ 0 $ 0 $ 307 $ 0 $ 2,427
Broad Cast Markets Due to Cost/Benefit [Member]          
Impairment of goodwill     300    
Publishing [Member]          
Impairment of goodwill     $ 100