Related-Party Transactions - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| 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 expired date | Dec. 31, 2014 | ||
| Accounts receivable from third parties | $ 3.2 | $ 3.0 | $ 3.2 |