Goodwill and Other Intangible Assets - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015 USD ($) Segment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Goodwill [Line Items]
Aggregate amortization expense	$ 3,500,000	$ 3,000,000	$ 2,500,000
Number of reporting segments | Segment	3
Impairment of goodwill		735,000
Television
Goodwill [Line Items]
Impairment of goodwill	$ 0	0
Digital
Goodwill [Line Items]
Impairment of goodwill	$ 0
Radio
Goodwill [Line Items]
Impairment of goodwill		$ 735,000