Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Income Tax Contingency [Line Items]
Tax benefit	$ 779	$ 560
Favorable prior year tax benefit	1,044	989	$ 776
Impairment losses		14,756
Discrete tax benefit			963
Total unrecognized tax benefits that, if recognized, would affect the company's effective tax rate	1,806	2,140	2,256
Accrued interest and penalties related to unrecognized tax benefits	500	$ 672	$ 952
United States [Member]
Income Tax Contingency [Line Items]
Pre-tax book income, domestic	27,015
Canada [Member]
Income Tax Contingency [Line Items]
Pre-tax book income, foreign	838
Undistributed Earnings of Foreign Subsidiaries	2,510
Foreign tax credit	$ 293