Related-Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]
Number of Class A common stock shares converted	1
Fees paid for carriage of programming	$ 0.0
Univision
Related Party Transaction [Line Items]
Common stock percentage held by Univision	10.00%
Period to grant television station for terms of retransmission consent agreements	6 years
Retransmission consent agreements expiring date	Dec. 31, 2014
Accounts receivable from third parties	$ 3.0	$ 3.2	$ 2.8