Segments - Information of total assets for company's reportable segments (Details 1) - USD ($) $ in Thousands		Apr. 30, 2017	Jan. 31, 2017	Apr. 30, 2016
Segment Reporting Information [Line Items]
Total Assets		$ 1,803,788	$ 1,851,944	$ 1,106,681
Corporate
Segment Reporting Information [Line Items]
Total Assets	[1]	139,622	146,333	215,082
Operating Segments | Wholesale
Segment Reporting Information [Line Items]
Total Assets		1,459,142	1,477,259	692,039
Operating Segments | Retail
Segment Reporting Information [Line Items]
Total Assets		$ 205,024	$ 228,352	$ 199,560

[1] Includes assets not allocated to any reportable segment.