Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Goodwill, Beginning balance	$ 86,991,000	$ 71,708,000
Purchase Price Adjustments	201,000	1,907,000
Goodwill Additions From VIEs		13,376,000
Goodwill Additions From Acquisitions	3,480,000
Goodwill, Ending balance	90,672,000	86,991,000
Digital
Goodwill [Line Items]
Goodwill, Beginning balance	46,442,000	31,159,000
Purchase Price Adjustments	201,000	1,907,000
Goodwill Additions From VIEs		13,376,000
Goodwill Additions From Acquisitions	3,480,000
Goodwill, Ending balance	50,123,000	46,442,000
Television
Goodwill [Line Items]
Goodwill, Beginning balance	40,549,000	40,549,000
Acquisition	0
Purchase Price Adjustments	0	0
Goodwill Additions From VIEs		0
Goodwill, Ending balance	40,549,000	40,549,000
Audio
Goodwill [Line Items]
Goodwill, Beginning balance	0	0
Goodwill, Ending balance	$ 0	$ 0