Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill, Beginning balance	$ 71,708,000	$ 58,043,000
Acquisition		15,487,000
Purchase Price Adjustments	1,907,000	(1,822,000)
Goodwill Additions From VIEs	13,376,000
Goodwill, Ending balance	86,991,000	71,708,000
Digital
Goodwill [Line Items]
Goodwill, Beginning balance	31,159,000	17,494,000
Acquisition		15,487,000
Purchase Price Adjustments	1,907,000	(1,822,000)
Goodwill Additions From VIEs	13,376,000
Goodwill, Ending balance	46,442,000	31,159,000
Television
Goodwill [Line Items]
Goodwill, Beginning balance	40,549,000	40,549,000
Acquisition	0	0
Purchase Price Adjustments	0	0
Goodwill, Ending balance	40,549,000	40,549,000
Audio
Goodwill [Line Items]
Goodwill, Beginning balance	0	0
Goodwill, Ending balance	$ 0	$ 0