Income Taxes (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Income Tax Contingency [Line Items]
Effective tax rate	13.90%	31.20%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent	17.30%
Canada [Member]
Income Tax Contingency [Line Items]
Undistributed earnings	$ 1,720
Estimated tax liability	$ 270