Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2016	Jan. 31, 2016
Accumulated Other Comprehensive Loss [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 0
Foreign currency translation adjustment	(12,527)	$ (21,013)
Unrealized loss on derivatives	(6)	(36)
Pension liability, net of tax	(48)	(51)
Total accumulated other comprehensive loss	$ (12,581)	$ (21,100)