Balance Sheet Components (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013	Jun. 29, 2014	Dec. 31, 2013
Balance Sheet Components [Line Items]
Cost method investment	$ 1,322,000		$ 1,322,000			$ 1,322,000
Cost-method Investments, Other than Temporary Impairment	0	0	0	0
Indefinite-Lived Intangible Assets (Excluding Goodwill)						100,000
In Process Research and Development achieving technological feasibility					7,500,000
Amortization expense	4,500,000	4,500,000	13,400,000	11,000,000
Goodwill, Acquired During Period			0
Goodwill, Impairment Loss			0	0
Minimum [Member]
Balance Sheet Components [Line Items]
Available-for-sale Securities, Maturity Period ( in months)			3 months
Maximum [Member]
Balance Sheet Components [Line Items]
Available-for-sale Securities, Maturity Period ( in months)			12 months
Retail [Member]
Balance Sheet Components [Line Items]
Goodwill, Acquired During Period			0
Commercial [Member]
Balance Sheet Components [Line Items]
Goodwill, Acquired During Period			0
Service Provider [Member]
Balance Sheet Components [Line Items]
Goodwill, Acquired During Period			$ 0