Balance Sheet Components (Schedule Of Intangibles, Net) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Purchased Intangible Assets [Line Items]
Gross	$ 122,644	$ 55,129
Accumulated Amortization	(34,995)	(28,508)
Finite-Lived Intangible Assets, Net	87,649	26,621
Indefinite-Lived Intangible Assets (Excluding Goodwill)	7,500	1,000
Intangible Assets Gross Excluding Goodwill	130,144	56,129
Intangibles, net	95,149	27,621
Technology [Member]
Purchased Intangible Assets [Line Items]
Gross	55,599	32,259
Accumulated Amortization	(24,899)	(22,065)
Finite-Lived Intangible Assets, Net	30,700	10,194
Customer Contracts And Relationships [Member]
Purchased Intangible Assets [Line Items]
Gross	56,500	16,000
Accumulated Amortization	(5,325)	(3,301)
Finite-Lived Intangible Assets, Net	51,175	12,699
Other [Member]
Purchased Intangible Assets [Line Items]
Gross	10,545	6,870
Accumulated Amortization	(4,771)	(3,142)
Finite-Lived Intangible Assets, Net	$ 5,774	$ 3,728