CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Interest and fee income	$ 133,010,377	$ 121,817,856	$ 260,988,298	$ 237,117,052
Insurance commissions and other income	16,953,202	17,580,470	34,240,408	35,117,158
Total revenues	149,963,579	139,398,326	295,228,706	272,234,210
Expenses:
Provision for loan losses	38,187,649	32,401,664	66,890,842	56,016,554
General and administrative expenses:
Personnel	49,134,111	44,669,605	102,443,786	93,082,624
Occupancy and equipment	9,692,239	9,138,637	19,071,209	17,781,286
Advertising	3,049,386	2,801,011	5,772,641	5,445,646
Amortization of intangible assets	265,665	339,040	577,167	707,720
Other	9,846,790	9,209,731	19,360,474	18,299,859
Total general and administrative expenses	71,988,191	66,158,024	147,225,277	135,317,135
Interest expense	5,280,791	4,066,038	9,957,245	7,992,192
Total expenses	115,456,631	102,625,726	224,073,364	199,325,881
Income before income taxes	34,506,948	36,772,600	71,155,342	72,908,329
Income taxes	12,941,679	13,871,151	26,478,372	27,391,882
Net income	$ 21,565,269	$ 22,901,449	$ 44,676,970	$ 45,516,447
Net income per common share:
Basic (in dollars per share)	$ 1.85	$ 1.76	$ 3.78	$ 3.42
Diluted (in dollars per share)	$ 1.80	$ 1.72	$ 3.67	$ 3.35
Weighted average common shares outstanding:
Basic (in shares)	11,629,326	12,985,345	11,814,675	13,298,372
Diluted (in shares)	11,979,939	13,287,278	12,159,759	13,596,244