Quarterly report pursuant to Section 13 or 15(d)

Goodwill - Schedule of Changes in Goodwill (Detail)

v3.20.2
Goodwill - Schedule of Changes in Goodwill (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Goodwill [Line Items]          
Balance, beginning of period before cumulative loss on impairment     $ 28,454 $ 28,818 $ 28,818
Accumulated loss on impairment     (4,456) (2,029) (2,029)
Balance, beginning of period after cumulative loss on impairment     23,998 26,789 26,789
Impairments based on the estimated fair value goodwill $ 0 $ 0 (307) $ 0 (2,427)
Balance, end of period before cumulative loss on impairment 28,454   28,454   28,454
Accumulated loss on impairment (4,763)   (4,763)   (4,456)
Ending period balance $ 23,691   $ 23,691   23,998
Radio Stations [Member]          
Goodwill [Line Items]          
Goodwill, Written off Related to Sale of Business Unit         (29)
Digital Media [Member]          
Goodwill [Line Items]          
Acquisitions         6
Goodwill, Written off Related to Sale of Business Unit         $ (341)