Balance Sheet Components - Additional Information (Details) (USD $)	3 Months Ended		6 Months Ended			3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2014 Property and Equipment	Jun. 30, 2014 Capitalized New Software	Jun. 30, 2014 Capitalized New Software
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 3,339,000	$ 1,510,000	$ 6,206,000	$ 3,002,000
Reclassified amount from project in process to software					23,130,000
Amortization expense recognized						$ 1,960,000	$ 3,391,000