Commitments and Contingencies - Narrative (Details)	3 Months Ended
	Mar. 31, 2016 USD ($) claim	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Long-term Purchase Commitment [Line Items]
Rent expense	$ 3,600,000	$ 3,200,000
Future minimum sublease rentals	1,000,000
Letters of credit available	1,200,000		$ 1,200,000
Amount drawn against letters of credit	0
Non-cancellable open orders	$ 14,200,000		$ 16,900,000
Number of claims | claim	0
Software and Services
Long-term Purchase Commitment [Line Items]
Non-cancellable open orders	$ 30,800,000