CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Revenues:
Interest and fee income	$ 117,112,842	$ 109,462,166	$ 340,693,868	$ 309,249,964
Insurance commissions and other income	18,833,629	16,577,751	50,547,636	45,253,208
Total revenues	135,946,471	126,039,917	391,241,504	354,503,172
Expenses:
Provision for loan losses	36,109,128	31,961,952	89,005,511	78,935,264
General and administrative expenses:
Personnel	42,097,880	38,936,367	127,475,303	116,021,038
Occupancy and equipment	8,343,121	7,833,837	25,281,745	22,915,645
Advertising	5,854,480	5,272,566	11,336,222	10,341,697
Amortization of intangible assets	414,913	479,839	1,281,910	1,496,661
Other	9,523,762	8,870,428	26,835,766	24,006,263
Total general and administrative expenses	66,234,156	61,393,037	192,210,946	174,781,304
Interest expense	3,338,048	3,803,333	10,668,984	11,253,129
Total expenses	105,681,332	97,158,322	291,885,441	264,969,697
Income before income taxes	30,265,139	28,881,595	99,356,063	89,533,475
Income taxes	10,683,304	10,817,534	36,288,206	32,520,472
Net income	$ 19,581,835	$ 18,064,061	$ 63,067,857	$ 57,013,003
Net income per common share:
Basic (in dollars per share)	$ 1.33	$ 1.15	$ 4.19	$ 3.60
Diluted (in dollars per share)	$ 1.30	$ 1.12	$ 4.08	$ 3.52
Weighted average common shares outstanding:
Basic (in shares)	14,747,139	15,704,165	15,046,415	15,828,309
Diluted (in shares)	15,119,679	16,103,482	15,453,573	16,203,233