Goodwill and Acquired Intangibles (Details 1) - USD ($) $ in Thousands	6 Months Ended
	Jul. 04, 2015	Jan. 03, 2015
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	$ 512,120	$ 514,146
Accumulated amortization	(185,382)	(154,814)
Acquired intangibles, net	326,738	359,332
In-process technology	1,600	1,600
Intangible assets, gross (excluding goodwill)	513,720	515,746
Intangible assets, net (excluding goodwill)	328,338	360,932
Existing Technology [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	328,447	328,325
Accumulated amortization	(104,637)	(84,822)
Acquired intangibles, net	223,810	243,503
Agreements and relationships [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	173,554	175,202
Accumulated amortization	(75,905)	(65,512)
Acquired intangibles, net	97,649	109,690
Tradenames Trademarks And Patents [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	10,119	10,619
Accumulated amortization	(4,840)	(4,480)
Acquired intangibles, net	$ 5,279	$ 6,139
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Expected time for completion of in-process research and development	3 months
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Expected time for completion of in-process research and development	6 months