Income Tax (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2015	Apr. 30, 2014
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, Percent	32.20%	32.90%
CANADA
Income Tax Contingency [Line Items]
Undistributed Earnings of Foreign Subsidiaries	1,800
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries	270