Commitments and Contingencies - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 claim	Dec. 31, 2013	Dec. 31, 2012
Loss Contingencies [Line Items]
Rent expense	$ 10,700,000	$ 3,700,000	$ 800,000
Future minimum sublease rentals	1,100,000
Letters of credit	1,900,000	900,000	0
Amounts drawn against letters of credit	0
Number of claims under indemnification provisions	0
Product [Member]
Loss Contingencies [Line Items]
Non-cancellable open orders	23,200,000	16,700,000
Software and services [Member]
Loss Contingencies [Line Items]
Non-cancellable open orders	$ 15,300,000