Acquisition-Related Intangible Assets, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 27, 2015	Dec. 31, 2014	May 21, 2013
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Acquired Finite-Lived Intangible Assets, Gross	$ 85,910	$ 85,910
Acquired Finite-Lived Intangible Assets, Accumulated Amortization	(19,583)	(17,119)
Acquired Finite-Lived Intangible Assets, Net	66,327	68,791
Acquisition-related Intangible Assets, Gross	89,410	89,410
Acquisition-related Intangible Assets, Net	69,827	72,291
In Process Research and Development [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Acquired Indefinite-Lived Intangible Assets (Excluding Goodwill)	3,500	3,500	28,100
Developed Technology Rights [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Acquired Finite-Lived Intangible Assets, Gross	67,670	67,670
Acquired Finite-Lived Intangible Assets, Accumulated Amortization	(13,398)	(11,607)
Acquired Finite-Lived Intangible Assets, Net	54,272	56,063
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	9 years 4 months 24 days	9 years 4 months 24 days
Customer Relationships [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Acquired Finite-Lived Intangible Assets, Gross	12,910	12,910
Acquired Finite-Lived Intangible Assets, Accumulated Amortization	(3,967)	(3,493)
Acquired Finite-Lived Intangible Assets, Net	8,943	9,417
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 9 months 18 days	6 years 9 months 18 days
Trade Names [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Acquired Finite-Lived Intangible Assets, Gross	3,700	3,700
Acquired Finite-Lived Intangible Assets, Accumulated Amortization	(774)	(670)
Acquired Finite-Lived Intangible Assets, Net	2,926	3,030
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years 10 months 24 days	8 years 10 months 24 days
Noncompete Agreements [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Acquired Finite-Lived Intangible Assets, Gross	700	700
Acquired Finite-Lived Intangible Assets, Accumulated Amortization	(650)	(563)
Acquired Finite-Lived Intangible Assets, Net	50	137
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years 0 months 0 days	2 years 0 months 0 days
Other Intangible Assets [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Acquired Finite-Lived Intangible Assets, Gross	930	930
Acquired Finite-Lived Intangible Assets, Accumulated Amortization	(794)	(786)
Acquired Finite-Lived Intangible Assets, Net	$ 136	$ 144
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year 2 months 24 days	1 year 2 months 24 days