Segment Information - Schedule of Long-Lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Revenues From External Customers And Long Lived Assets [Line Items]
Property and equipment, net	$ 47,117	$ 39,859
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Property and equipment, net	45,756	39,069
Rest of the world
Revenues From External Customers And Long Lived Assets [Line Items]
Property and equipment, net	$ 1,361	$ 790