Investments Total Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 28, 2014
Investments [Abstract]
Equity method investments	$ 1,645,979	$ 1,689,996
Cost method investments	15,868	18,238
Marketable equity securities	2,990	8,958
Total investments	$ 1,664,837	$ 1,717,192