Subsequent Events - Additional Information (Detail) - Subsequent Event - USD ($) $ in Millions	Nov. 01, 2017	Oct. 02, 2017
Univision
Subsequent Event [Line Items]
New affiliation agreement, commencement date		Oct. 02, 2017
Univision | All Univision and UniMas Network Affiliate Stations Except in Orlando, Florida; Tampa, Florida; and Washington, D.C
Subsequent Event [Line Items]
New proxy agreement and new marketing and sales agreements, expiration date		Dec. 31, 2026
Univision | Univision and UniMás Network Affiliate Stations in Orlando, Florida; Tampa, Florida; and Washington, D.C
Subsequent Event [Line Items]
New proxy agreement and new marketing and sales agreements, expiration date		Dec. 31, 2021
KMIR-TV and KPSE-LD
Subsequent Event [Line Items]
Business acquisition date	Nov. 01, 2017
Payment to acquire television stations	$ 21
Business acquisition description of acquired entity	the Company completed the acquisition of television stations KMIR-TV, the local NBC affiliate, and KPSE-LD, the local MyNetworkTV affiliate, both of which serve the Palm Springs, California area