Goodwill and Purchased Intangible Assets - Summary of Intangible Assets Acquired (Details) (USD $) In Thousands, unless otherwise specified			6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Developed Technology	Jun. 30, 2014 Customer Relationships	Jun. 30, 2014 Trade Name
Finite Lived Intangible Assets [Line Items]
Cost	$ 6,696	$ 0	$ 5,308	$ 1,327	$ 61
Accumulated Amortization	(529)		(420)	(92)	(17)
Net	$ 6,167		$ 4,888	$ 1,235	$ 44
Remaining Useful Life			3 years 2 months 12 days	3 years 8 months 12 days	8 months 12 days