Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, Percent	26.40%	32.20%
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Undistributed Earnings of Foreign Subsidiaries	$ 3,243
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries	$ 539