SEGMENTS - Information of Total Assets for Company's Reportable Segments (Details) - USD ($) $ in Thousands	Jan. 31, 2019	Jan. 31, 2018
Segment Reporting Information [Line Items]
Total assets	$ 2,208,058	$ 1,915,177
Corporate Segment
Segment Reporting Information [Line Items]
Total assets	182,452	145,418
Operating Segments | Wholesale operations
Segment Reporting Information [Line Items]
Total assets	1,834,610	1,554,191
Operating Segments | Retail
Segment Reporting Information [Line Items]
Total assets	$ 190,996	$ 215,568