Commitments and Contingencies - Schedule of Purchase Commitments (Details) $ in Thousands	Jan. 31, 2016 USD ($)
Purchase Commitments [Line Items]
Purchase obligation due within one year	$ 43,350
Purchase obligations due in second and third year	3,376
Total	46,726
Open capital purchase commitments
Purchase Commitments [Line Items]
Purchase obligation due within one year	1,537
Purchase obligations due in second and third year	0
Total	1,537
Other open purchase commitments
Purchase Commitments [Line Items]
Purchase obligation due within one year	41,813
Purchase obligations due in second and third year	3,376
Total	45,189
Other vendor commitments
Purchase Commitments [Line Items]
Purchase obligation due within one year	0
Purchase obligations due in second and third year	0
Total	$ 0