Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2012	Oct. 31, 2011
Revenues:
Sales	$ 98,194	$ 100,128	$ 196,491	$ 190,452
Interest income	12,025	10,679	23,728	20,879
Total revenue	110,219	110,807	220,219	211,331
Costs and expenses:
Cost of sales, excluding depreciation shown below	56,204	57,807	112,389	109,369
Selling, general and administrative	17,351	16,721	35,207	32,918
Provision for credit losses	23,647	22,623	45,310	41,157
Interest expense	708	575	1,361	1,018
Depreciation and amortization	696	565	1,358	1,103
Total costs and expenses	98,606	98,291	195,625	185,565
Income before taxes	11,613	12,516	24,594	25,766
Provision for income taxes	4,335	4,756	9,198	9,725
Net income	7,278	7,760	15,396	16,041
Less: Dividends on mandatorily redeemable preferred stock	(10)	(10)	(20)	(20)
Net income attributable to common stockholders	$ 7,268	$ 7,750	$ 15,376	$ 16,021
Earnings per share:
Basic (in Dollars per share)	$ 0.80	$ 0.79	$ 1.67	$ 1.60
Diluted (in Dollars per share)	$ 0.76	$ 0.77	$ 1.59	$ 1.55
Weighted average number of shares outstanding:
Basic (in Shares)	9,105,921	9,776,817	9,205,332	10,024,088
Diluted (in Shares)	9,579,409	10,081,274	9,665,739	10,330,549