Allowance for Doubtful Accounts (Activity in Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Jan. 31, 2022
Segment Reporting Information [Line Items]
Beginning balance	$ (17,391)	$ (17,459)	$ (17,459)
Provision for credit losses, net	414	(76)	(157)
Accounts written off as uncollectible	38	69	225
Ending balance	(16,939)	(17,466)	(17,391)
Wholesale operations
Segment Reporting Information [Line Items]
Beginning balance	(17,307)	(17,429)	(17,429)
Provision for credit losses, net	411	(54)	(103)
Accounts written off as uncollectible	38	69	225
Ending balance	(16,858)	(17,414)	(17,307)
Retail
Segment Reporting Information [Line Items]
Beginning balance	(84)	(30)	(30)
Provision for credit losses, net	3	(22)	(54)
Ending balance	$ (81)	$ (52)	$ (84)