Balance Sheet Components (Schedule Of Intangibles, Net) (Details) - USD ($) $ in Thousands	Apr. 03, 2016	Dec. 31, 2015
Intangible Assets [Line Items]
Gross	$ 128,144	$ 128,144
Accumulated Amortization	(83,441)	(79,197)
Finite-Lived Intangible Assets, Net	44,703	48,947
Technology [Member]
Intangible Assets [Line Items]
Gross	61,099	61,099
Accumulated Amortization	(50,694)	(48,485)
Finite-Lived Intangible Assets, Net	10,405	12,614
Customer Contracts And Relationships [Member]
Intangible Assets [Line Items]
Gross	56,500	56,500
Accumulated Amortization	(25,061)	(23,290)
Finite-Lived Intangible Assets, Net	31,439	33,210
Other [Member]
Intangible Assets [Line Items]
Gross	10,545	10,545
Accumulated Amortization	(7,686)	(7,422)
Finite-Lived Intangible Assets, Net	$ 2,859	$ 3,123