Segments - Information of total assets for company's reportable segments (Details 1) - USD ($) $ in Thousands	Apr. 30, 2016	Jan. 31, 2016	Apr. 30, 2015
Segment Reporting Information [Line Items]
Total Assets	$ 1,106,681	$ 1,184,070	$ 952,050
Wholesale
Segment Reporting Information [Line Items]
Total Assets	692,039	763,353	625,109
Retail
Segment Reporting Information [Line Items]
Total Assets	199,560	210,118	190,753
Corporate
Segment Reporting Information [Line Items]
Total Assets	$ 215,082	$ 210,599	$ 136,188