Goodwill and Acquired Intangibles (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross Carrying Amount	$ 282,713	$ 289,289
Accumulated Amortization	(104,822)	(104,351)
Acquired Intangibles	177,891	184,938
Existing Technology [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross Carrying Amount	112,697	112,940
Accumulated Amortization	(33,595)	(30,171)
Acquired Intangibles	79,102	82,769
Agreements and relationships [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross Carrying Amount	133,397	133,764
Accumulated Amortization	(39,965)	(37,769)
Acquired Intangibles	93,432	95,995
Distribution rights [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross Carrying Amount	30,100	30,100
Accumulated Amortization	(29,348)	(28,595)
Acquired Intangibles	752	1,505
Tradenames Trademarks And Patents [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross Carrying Amount	6,519	12,485
Accumulated Amortization	(1,914)	(7,816)
Acquired Intangibles	$ 4,605	$ 4,669