Goodwill and Intangible Assets - Finite-Lived (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Dec. 28, 2013
Finite-lived Intangible Assets [Roll Forward]
Intangible Assets, Gross Amount	$ 72,636
Additions	0
Intangible Assets, Gross Amount	72,636
Accumulated Amortization	22,066
Expense	5,072
Accumulated Amortization	27,138
Intangible Assets, Net	45,498	50,570
Intangible Assets Net Excluding Goodwill [Roll Forward]
Intangible Assets Net Excluding Goodwill Gross	79,536
Intangible Assets Net Excluding Goodwill Acquired During Period	0
Intangible Assets Net Excluding Goodwill Gross	79,536
Intangible Assets, Net (Excluding Goodwill)	52,398	57,470
Existing developed technologies
Finite-lived Intangible Assets [Roll Forward]
Intangible Assets, Gross Amount	51,248
Additions	0
Intangible Assets, Gross Amount	51,248
Accumulated Amortization	18,955
Expense	4,399
Accumulated Amortization	23,354
Intangible Assets, Net	27,894	32,293
Weight Average Useful Life	2 years 3 months 6 days
Trade name
Finite-lived Intangible Assets [Roll Forward]
Intangible Assets, Gross Amount	4,388
Additions	0
Intangible Assets, Gross Amount	4,388
Accumulated Amortization	530
Expense	110
Accumulated Amortization	640
Intangible Assets, Net	3,748	3,858
Weight Average Useful Life	8 years 6 months 6 days
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Intangible Assets, Gross Amount	17,000
Intangible Assets, Gross Amount	17,000
Accumulated Amortization	2,581
Expense	563
Accumulated Amortization	3,144
Intangible Assets, Net	13,856	14,419
Weight Average Useful Life	6 years 6 months 6 days
In-process research and development
Indefinite-lived Intangible Assets [Roll Forward]
Beginning Balance	6,900
Indefinite-lived Intangible Assets, Acquired During Period	0
Ending Balance	$ 6,900