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Income Taxes - Schedule of Loss Before Provision (Benefit) For Income (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Jan. 31, 2014
Income Tax Disclosure [Abstract]      
United States $ (155,794) $ (132,084) $ (148,032)
Foreign (46,464) (36,712) (22,956)
Loss before provision (benefit) for income taxes $ (202,258) $ (168,796) $ (170,988)