Note C - Finance Receivables, Net - Changes in Finance Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Balance			$ 334,793	$ 324,144
Finance receivable originations			356,776	336,508
Finance receivable collections			(175,696)	(173,949)
Provision for credit losses	$ (37,645)	$ (32,786)	(110,467)	(106,225)
Losses on claims for payment protection plan			(11,260)	(9,815)
Inventory acquired in repossession and payment protection plan claims			(30,610)	(31,594)
Balance	$ 363,536	$ 339,069	$ 363,536	$ 339,069