Note C - Finance Receivables (Detail) - Financing receivables analysis	6 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Principal collected as a percent of average finance receivables	29.40%	31.60%
Average down-payment percentage	6.80%	7.10%
Average originating contract term (in months)	27 months	26 months 9 days
Portfolio weighted average contract term, including modifications (in months)	28 months 9 days	27 months 15 days