Segments - Information of total assets for company's reportable segments (Detail) - USD ($) $ in Thousands	Jul. 31, 2015	Jan. 31, 2015	Jul. 31, 2014
Segment Reporting Information [Line Items]
Total Assets	$ 1,189,479	$ 1,046,718	$ 1,077,418
Wholesale
Segment Reporting Information [Line Items]
Total Assets	875,347	684,479	820,479
Retail
Segment Reporting Information [Line Items]
Total Assets	223,829	182,363	169,268
Corporate
Segment Reporting Information [Line Items]
Total Assets	$ 90,303	$ 179,876	$ 87,671