Commitments and Contingencies - Additional Information (Details) - USD ($)	1 Months Ended	9 Months Ended
	Aug. 31, 2015	Oct. 31, 2015	Nov. 30, 2015	Jul. 31, 2015	Jan. 31, 2015
Commitments And Contingencies [Line Items]
Lease obligations	$ 19,700,000
Lease expiration period	2023
Outstanding letters of credit	$ 3,300,000	$ 7,100,000			$ 4,600,000
Non-cancelable purchase obligation related to software services				$ 1,100,000
Letter of credit maturity year and month		2023-03
Loss contingency		$ 0			$ 0
Subsequent Event
Commitments And Contingencies [Line Items]
Non-cancelable purchase obligation related to software services			$ 6,100,000