Goodwill and Acquired Intangibles (Details 1) (USD $)	9 Months Ended
	Sep. 27, 2014	Dec. 28, 2013
Finite-Lived Intangible Assets [Line Items]
In-process Technology Transferred to Existing Technology	$ 8,600,000
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	511,571,000	448,003,000
Accumulated amortization	(137,960,000)	(139,820,000)
Acquired intangibles, net	373,611,000	308,183,000
In-process technology	5,216,000	3,510,000
Intangible assets, gross (excluding goodwill)	516,787,000	451,513,000
Intangible assets, net (excluding goodwill)	378,827,000	311,693,000
Existing Technology [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	325,565,000	237,624,000
Accumulated amortization	(74,679,000)	(53,243,000)
Acquired intangibles, net	250,886,000	184,381,000
Agreements and relationships [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	175,388,000	170,760,000
Accumulated amortization	(59,258,000)	(53,607,000)
Acquired intangibles, net	116,130,000	117,153,000
Distribution rights [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount		30,100,000
Accumulated amortization		(30,100,000)
Acquired intangibles, net		0
Tradenames Trademarks And Patents [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	10,618,000	9,519,000
Accumulated amortization	(4,023,000)	(2,870,000)
Acquired intangibles, net	$ 6,595,000	$ 6,649,000
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Expected completion of in-process technology	3 months
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Expected completion of in-process technology	15 months