Note C - Changes in the Finance Receivables Allowance for Credit Losses (Details) - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Balance at beginning of period	$ 93,224	$ 86,033
Provision for credit losses	106,225	89,453
Charge-offs, net of recovered collateral	(95,221)	(80,213)
Balance at end of period	$ 104,228	$ 95,273