Investments TV Food Network (Details) - Television Food Network, G.P. - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Schedule of Equity Method Investments [Line Items]
Revenues, net	$ 298,275	$ 278,410	$ 575,451	$ 539,633
Operating income	188,381	151,728	370,377	282,026
Net income	$ 157,213	$ 155,770	$ 305,530	$ 289,925