Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Jan. 31, 2016
Accumulated Other Comprehensive Loss [Line Items]
Foreign currency translation adjustment	$ (19,937)		$ (21,013)
Unrealized loss on derivatives	(17)		(36)
Pension liability, net of tax	(105)		(51)
Total accumulated other comprehensive loss	(20,059)		$ (21,100)
Reclassification from Accumulated Other Comprehensive Loss, Current Period, Net of Tax	$ 0	$ 0