Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill	$ 4,070,039	$ 4,067,529
Goodwill, Accumulated Amortization	0	0
Customer relationships
Goodwill and Intangible Assets Disclosure [Line Items]
Amortizable intangible assets	929,977	929,852
Amortizable intangible assets, accumulated amortization	(229,544)	(210,691)
Other
Goodwill and Intangible Assets Disclosure [Line Items]
Amortizable intangible assets	290,984	290,875
Amortizable intangible assets, accumulated amortization	(123,890)	(113,725)
Television station FCC licenses
Goodwill and Intangible Assets Disclosure [Line Items]
Indefinite-lived intangibles	1,191,950	1,191,950
Indefinite-lived intangibles (including goodwill), accumulated amortization	0	0
Trade names
Goodwill and Intangible Assets Disclosure [Line Items]
Indefinite-lived intangibles	925,171	925,171
Indefinite-lived intangibles (including goodwill), accumulated amortization	$ 0	$ 0