Allowance for Doubtful Accounts (Accounts Receivable and Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Jan. 31, 2021	Jul. 31, 2020	Jan. 31, 2020
Segment Reporting Information [Line Items]
Accounts receivable, gross	$ 402,489	$ 510,157	$ 287,710
Allowance for doubtful accounts	(17,442)	(17,459)	(11,208)	$ (710)
Accounts receivable, net	385,047	492,698	276,502
Wholesale
Segment Reporting Information [Line Items]
Accounts receivable, gross	400,714	509,010	284,031
Allowance for doubtful accounts	(17,386)	(17,429)	(11,178)	(628)
Accounts receivable, net	383,328	491,581	272,853
Retail [Member]
Segment Reporting Information [Line Items]
Accounts receivable, gross	1,775	1,147	3,679
Allowance for doubtful accounts	(56)	(30)	(30)	$ (82)
Accounts receivable, net	$ 1,719	$ 1,117	$ 3,649