Segments - Information of total assets for company's reportable segments (Details) - USD ($) $ in Thousands	Jul. 31, 2020	Jan. 31, 2020	Jul. 31, 2019
Segment Reporting Information [Line Items]
Total assets	$ 2,269,814	$ 2,565,137	$ 2,712,436
Corporate Segment
Segment Reporting Information [Line Items]
Total assets	444,911	380,130	240,643
Operating Segments | Wholesale
Segment Reporting Information [Line Items]
Total assets	1,685,530	1,912,175	2,109,198
Operating Segments | Retail
Segment Reporting Information [Line Items]
Total assets	$ 139,373	$ 272,832	$ 362,595