Balance Sheet Components (Schedule Of Property And Equipment, Net) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013
Total property and equipment, gross	$ 102,054	$ 98,945
Accumulated depreciation and amortization	(76,049)	(71,751)
Total property and equipment, net	26,005	27,194
Computer Equipment [Member]
Total property and equipment, gross	8,728	8,527
Furniture, Fixtures And Leasehold Improvements [Member]
Total property and equipment, gross	14,169	14,019
Software [Member]
Total property and equipment, gross	25,875	25,722
Machinery And Equipment [Member]
Total property and equipment, gross	53,270	50,656
Construction in Progress [Member]
Total property and equipment, gross	$ 12	$ 21