Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Revenues:
Sales	$ 107,765	$ 98,194	$ 216,914	$ 196,491
Interest income	13,666	12,025	27,061	23,728
Total revenue	121,431	110,219	243,975	220,219
Costs and expenses:
Cost of sales, excluding depreciation shown below	62,823	56,204	125,445	112,389
Selling, general and administrative	19,581	17,351	39,395	35,207
Provision for credit losses	28,296	23,647	54,826	45,310
Interest expense	722	708	1,512	1,361
Depreciation and amortization	795	696	1,572	1,358
(Gain) loss on disposal of property and equipment	(2)		39
Total costs and expenses	112,215	98,606	222,789	195,625
Income before taxes	9,216	11,613	21,186	24,594
Provision for income taxes	3,411	4,335	7,840	9,198
Net income	5,805	7,278	13,346	15,396
Less: Dividends on mandatorily redeemable preferred stock	(10)	(10)	(20)	(20)
Net income attributable to common stockholders	$ 5,795	$ 7,268	$ 13,326	$ 15,376
Earnings per share:
Basic (in Dollars per share)	$ 0.64	$ 0.80	$ 1.48	$ 1.67
Diluted (in Dollars per share)	$ 0.61	$ 0.76	$ 1.40	$ 1.59
Weighted average number of shares outstanding:
Basic (in Shares)	9,016,820	9,105,921	9,018,524	9,205,332
Diluted (in Shares)	9,484,654	9,579,409	9,488,753	9,665,739