Note M - Supplemental Cash Flow Information - Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Statement [Line Items]
Interest paid	$ 36,605	$ 10,421	$ 7,029
Income taxes paid, net	5,480	19,238	26,964
Inventory acquired in repossession and accident protection plan claims	127,035	84,096	50,868
Net settlement option exercises	223	5,685	1,616
Right-of-use assets obtained in exchange for operating lease liabilities	2,307	3,176	2,510
Right-of-use assets obtained in exchange for operating lease liabilities through acquisitions	$ 0	$ 0	$ 0