Balance Sheet Components (Property And Equipment And Accumulated Depreciation) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 336,037,000	$ 306,038,000
Less: Accumulated depreciation	(204,356,000)	(169,685,000)
Property and equipment, net	131,681,000	136,353,000
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	84,193,000	67,090,000
Property and equipment, useful life, years	3 years
Open Connect [Member]
Property, Plant and Equipment [Line Items]
Increase in Operations and other equipment	30,000,000
Percent increase in Operations and other equipment	10.00%
Operations And Other Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	100,207,000	100,306,000
Property and equipment, useful life, years	5 years
Software, including internal-use software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	39,073,000	35,356,000
Property and equipment, useful life, years	3 years
Furniture And Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	18,208,000	17,310,000
Property and equipment, useful life, years	3 years
Building [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	40,681,000	40,681,000
Property and equipment, useful life, years	30 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	45,393,000	44,473,000
Capital Work-In-Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 8,282,000	$ 822,000