Goodwill and Acquired Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015
Changes in the carrying amount of goodwill
Balance at beginning of period	$ 553,767	$ 456,905
Goodwill resulting from acquisitions		102,025
Measurement period adjustments		(3,476)
Effect of foreign currency translation	(1,995)	(1,687)
Balance at end of period	$ 551,772	$ 553,767