Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities
Net income	$ 5,700,493	$ 5,407,456
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	75,335	72,467
Gain on sale of property and equipment	(2,013)
Provision for credit losses	2,641,791	3,103,266
Amortization of dealer discounts	(2,974,446)	(3,147,869)
Deferred income taxes	858,193	(253,697)
Share-based compensation	122,259	281,707
Change in fair value of interest rate swap agreements	(833,259)	209,101
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(2,958)	(2,957)
Accounts payable and accrued expenses	(740,518)	(348,076)
Income taxes payable	2,603,069	3,598,939
Deferred revenues	240,923	18,692
Net cash provided by operating activities	7,688,869	8,939,029
Cash flows from investing activities
Purchase and origination of finance receivables	(39,328,663)	(34,792,569)
Principal payments received	34,229,127	32,533,699
Increase in assets held for resale	(578,359)	(109,500)
Purchase of property and equipment	(101,122)	(86,466)
Proceeds from sale of property and equipment	12,800
Net cash used in investing activities	(5,766,217)	(2,454,836)
Cash flows from financing activities
Net proceeds from (repayment of) line of credit	521,510	(3,000,000)
Decrease in drafts payable	(272,791)	(112,270)
Payment of cash dividends	(1,460,372)	(1,208,328)
Proceeds from exercise of stock options	83,140	51,210
Excess tax benefits from exercise of stock options	67,096	31,525
Net cash used in financing activities	(1,061,417)	(4,237,863)
Net increase in cash	861,235	2,246,330
Cash, beginning of period	2,797,716	2,803,054
Cash, end of period	$ 3,658,951	$ 5,049,384