Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities
Net income	$ 10,017,045	$ 10,557,594
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	152,154	142,720
Gain on sale of property and equipment	(21,800)	(5,615)
Provision for credit losses	6,614,895	6,364,987
Amortization of dealer discounts	(6,108,055)	(6,082,112)
Deferred income taxes	1,215,453	628,705
Share-based compensation	261,444	575,404
Change in fair value of interest rate swap agreements	(583,643)	683,120
Changes in operating assets and liabilities:
Prepaid expenses and other assets	58,596	201,685
Accounts payable and accrued expenses	(596,685)	408,383
Income taxes receivable	(744,168)	(785,353)
Deferred revenues	506,462	46,861
Net cash provided by operating activities	10,771,698	12,736,379
Cash flows from investing activities
Purchase and origination of finance receivables	(78,220,371)	(71,122,887)
Principal payments received	67,045,251	64,080,392
Increase in assets held for resale	(808,697)	(268,649)
Purchase of property and equipment	(178,912)	(149,566)
Proceeds from sale of property and equipment	40,781	6,670
Net cash used in investing activities	(12,121,948)	(7,454,040)
Cash flows from financing activities
Net draws on or repayment from line of credit	5,500,000	(2,000,000)
Change in drafts payable	22,590	(37,216)
Payment of cash dividends	(2,851,126)	(2,649,163)
Proceeds from exercise of stock options	217,673	220,136
Excess tax benefits from exercise of stock options and vesting of other share awards	137,079	103,400
Net cash provided (used) by financing activities	3,026,216	(4,362,843)
Net increase in cash	1,675,966	919,496
Cash, beginning of period	2,797,716	2,803,054
Cash, end of period	$ 4,473,682	$ 3,722,550