Goodwill and Acquired Intangibles (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross Carrying Amount	$ 290,514	$ 264,776
Accumulated Amortization	(97,746)	(91,542)
Acquired Intangibles	192,768	173,234
Existing Technology [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross Carrying Amount	112,947	90,433
Accumulated Amortization	(26,561)	(17,119)
Acquired Intangibles	86,386	73,314
Agreements and relationships [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross Carrying Amount	134,982	118,060
Accumulated Amortization	(35,705)	(27,123)
Acquired Intangibles	99,277	90,937
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	(27,843)	(25,585)
Acquired Intangibles	2,257	4,515
Tradenames Trademarks And Patents [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross Carrying Amount	12,485	26,183
Accumulated Amortization	(7,637)	(21,715)
Acquired Intangibles	$ 4,848	$ 4,468