Derivatives and Hedging Activities - Summary of the Carrying Values of Derivative Instruments (Details) - USD ($) $ in Thousands		Jul. 31, 2016	Jan. 31, 2016
Derivatives, Fair Value [Line Items]
Fair Value - Assets		$ 766	$ 0
Fair Value - (Liabilities)		(483)	0
Derivative Net Carrying Value		283	0
Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Net Carrying Value	[1]	283	0
Level 2 [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair Value - Assets	[1],[2]	766	0
Level 2 [Member] | Foreign Exchange Contract [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair Value - (Liabilities)	[1],[2]	$ (483)	$ 0

[1] Assets are included in “Other current assets” and liabilities are included in “Accrued liabilities” within the condensed consolidated balance sheets.

[2] The fair values of the foreign exchange forward contracts are valued using Level 2 inputs. Please refer to Note 7.