CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenues:
Interest and fee income	$ 116,232,521	$ 103,717,055	$ 223,581,026	$ 199,787,798
Insurance commissions and other income	15,906,450	14,348,036	31,714,007	28,675,457
Total revenues	132,138,971	118,065,091	255,295,033	228,463,255
Expenses:
Provision for loan losses	30,057,269	27,275,104	52,896,383	46,973,312
General and administrative expenses:
Personnel	40,742,200	37,350,702	85,377,423	77,084,671
Occupancy and equipment	8,719,513	7,893,050	16,938,624	15,081,808
Advertising	2,698,483	2,606,815	5,481,742	5,069,131
Amortization of intangible assets	434,208	510,186	866,997	1,016,822
Other	8,869,095	7,729,991	17,312,004	15,135,835
Total general and administrative expenses	61,463,499	56,090,744	125,976,790	113,388,267
Interest expense	3,947,066	4,095,828	7,330,936	7,449,796
Total expenses	95,467,834	87,461,676	186,204,109	167,811,375
Income before income taxes	36,671,137	30,603,415	69,090,924	60,651,880
Income taxes	13,367,213	10,369,185	25,604,902	21,702,938
Net income	$ 23,303,924	$ 20,234,230	$ 43,486,022	$ 38,948,942
Net income per common share:
Basic (in dollars per share)	$ 1.56	$ 1.29	$ 2.86	$ 2.45
Diluted (in dollars per share)	$ 1.52	$ 1.26	$ 2.78	$ 2.40
Weighted average common shares outstanding:
Basic (in shares)	14,915,026	15,653,612	15,196,871	15,890,720
Diluted (in shares)	15,327,695	16,023,071	15,618,842	16,235,868