Note C - Finance Receivables, Net - Changes in the Finance Receivables Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Balance			$ 155,041	$ 127,842
Provision for credit losses	$ 47,639	$ 40,233	127,585	112,885
Charge-offs, net of recovered collateral			(97,046)	(100,445)
Balance	$ 185,580	$ 140,282	$ 185,580	$ 140,282