Note C - Finance Receivables, Net - Changes in Finance Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016
Balance			$ 357,161	$ 334,793
Finance receivable originations			239,007	244,680
Finance receivable collections			(118,609)	(117,126)
Provision for credit losses	$ (38,746)	$ (39,441)	(72,906)	(72,822)
Losses on claims for payment protection plan			(7,980)	(6,919)
Inventory acquired in repossession and payment protection plan claims			(20,096)	(19,651)
Balance	$ 376,577	$ 362,955	$ 376,577	$ 362,955