Balance Sheet Components (Schedule Of Property And Equipment, Net) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Total property and equipment, gross	$ 126,536	$ 118,587
Accumulated depreciation and amortization	(104,152)	(88,893)
Total property and equipment, net	22,384	29,694
Computer Equipment [Member]
Total property and equipment, gross	11,161	9,779
Furniture, Fixtures And Leasehold Improvements [Member]
Total property and equipment, gross	18,317	19,379
Software [Member]
Total property and equipment, gross	30,396	29,294
Machinery and Equipment [Member]
Total property and equipment, gross	$ 66,662	$ 60,135