Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Revenues:
Sales	$ 119,435	$ 107,765	$ 232,894	$ 216,914
Interest and other income	14,399	13,666	28,316	27,061
Total revenue	133,834	121,431	261,210	243,975
Costs and expenses:
Cost of sales, excluding depreciation shown below	68,156	62,823	133,627	125,445
Selling, general and administrative	20,655	19,581	41,475	39,395
Provision for credit losses	31,371	28,296	59,247	54,826
Interest expense	721	722	1,396	1,512
Depreciation and amortization	929	795	1,847	1,572
(Gain) loss on disposal of property and equipment	20	(2)	20	39
Total costs and expenses	121,852	112,215	237,612	222,789
Income before taxes	11,982	9,216	23,598	21,186
Provision for income taxes	4,463	3,411	8,819	7,840
Net income	7,519	5,805	14,779	13,346
Less: Dividends on mandatorily redeemable preferred stock	(10)	(10)	(20)	(20)
Net income attributable to common stockholders	$ 7,509	$ 5,795	$ 14,759	$ 13,326
Earnings per share:
Basic (in Dollars per share)	$ 0.87	$ 0.64	$ 1.70	$ 1.48
Diluted (in Dollars per share)	$ 0.83	$ 0.61	$ 1.62	$ 1.40
Weighted average number of shares outstanding:
Basic (in Shares)	8,604,003	9,016,820	8,660,173	9,018,524
Diluted (in Shares)	9,022,437	9,484,654	9,082,750	9,488,753