Balance Sheet Components (Schedule Of Property And Equipment, Net) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2014	Dec. 31, 2013
Total property and equipment, gross	$ 112,365	$ 98,945
Accumulated depreciation and amortization	(84,736)	(71,751)
Total property and equipment, net	27,629	27,194
Computer Equipment [Member]
Total property and equipment, gross	9,334	8,527
Furniture, Fixtures And Leasehold Improvements [Member]
Total property and equipment, gross	17,670	14,019
Software [Member]
Total property and equipment, gross	28,318	25,722
Machinery And Equipment [Member]
Total property and equipment, gross	57,038	50,656
Construction in Progress [Member]
Total property and equipment, gross	$ 5	$ 21