Note C - Finance Receivables, Net - Changes in the Finance Receivables Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2018
Balance	$ 127,842	$ 117,821	$ 109,693
Provision for credit losses	162,246	146,363	149,059
Charge-offs, net of recovered collateral	(135,047)	(136,342)	(140,931)
Balance	$ 155,041	$ 127,842	$ 117,821

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant