Intangible Assets and Goodwill (Changes in Intangible Assets Other Than Goodwill) (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
FCC Licenses
Indefinite-Lived Intangible Assets, Beginning Balance	$ 1,540,183
Dispositions	(390)
Indefinite-Lived Intangible Assets, Ending Balance	1,539,793
Definite-Lived
Definite-Lived Intangible Assets, Beginning Balance	116,499
Dispositions	0
Amortization	(9,092)
Definite-Lived Intangible Assets, Ending Balance	107,407
Total
Intangible Assets Total, Beginning Balance	1,656,682
Dispositions	(390)
Amortization	(9,092)
Intangible Assets Total, Ending Balance	$ 1,647,200