Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill	$ 50,081,000	$ 50,081,000	$ 36,647,000
Acquisition		14,169,000
Impairment		(735,000)
Television
Goodwill [Line Items]
Goodwill	35,912,000	35,912,000	35,912,000
Impairment	0	0
Radio
Goodwill [Line Items]
Goodwill			$ 735,000
Impairment		(735,000)
Digital
Goodwill [Line Items]
Goodwill	14,169,000	14,169,000
Acquisition		$ 14,169,000
Impairment	$ 0