Balance Sheet Components - Property And Equipment And Accumulated Depreciation (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 386,805	$ 357,196
Less: Accumulated depreciation	(245,090)	(223,591)
Property and equipment, net	141,715	133,605
Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Property and equipment, gross	125,264	102,867
Operations and other equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Property and equipment, gross	94,109	96,361
Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Property and equipment, gross	36,249	36,439
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Property and equipment, gross	24,010	21,011
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	30 years
Property and equipment, gross	40,681	40,681
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	54,343	51,194
Capital work-in-progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 12,149	$ 8,643