CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows From Operating Activities:
Net income	$ 6,779,903	$ 4,411,083
Depreciation, amortization and accretion:
Premises and equipment	1,000,312	1,012,616
Net deferred loan costs	746,630	1,110,291
Debt and mortgage-backed securities premiums and discounts, net	206,689	196,323
Equity trust expense, net	70,063	142,612
Stock option and award expense	754,613	540,047
Provision for loan losses	3,440,000	8,500,000
Provision for losses on real estate acquired in settlement of loans	1,203,626	1,364,244
Gains on sales of real estate acquired in settlement of loans	(301,464)	(308,287)
Originations of mortgage loans held for sale	(690,305,100)	(686,962,005)
Proceeds from sales of mortgage loans held for sale	723,548,814	640,646,666
Gain on sales of mortgage loans held for sale	(6,290,814)	(2,943,666)
Increase in cash value of bank-owned life insurance	(453,304)	(510,652)
Decrease in deferred tax asset	1,170,528	2,732,166
Common stock issued under employee compensation plan	41,999	45,878
Excess tax benefit from stock-based compensation		(1,286)
Tax (benefit) expense for release of equity trust shares	(12,045)	1,334
Increase (decrease) in accrued expenses	129,871	(411,880)
Decrease in current income taxes payable	(1,934,998)	(2,641,967)
Changes in other assets and liabilities	2,986,721	272,484
Net adjustments	36,002,141	(37,215,082)
Net cash provided by (used in) operating activities	42,782,044	(32,803,999)
Proceeds from:
Maturities of debt securities available for sale	37,900,000	23,300,000
Principal payments on mortgage-backed securities	427,479	2,953,539
Redemption of Federal Home Loan Bank stock	8,139,000	2,147,300
Sales of real estate acquired in settlement of loans	9,187,377	1,668,757
Purchases of:
Debt securities available for sale	(50,551,398)	(19,911,937)
Federal Home Loan Bank stock	(7,115,500)	(2,987,300)
Premises and equipment	(539,907)	(994,810)
Net (increase) decrease in loans receivable	(27,186,465)	12,230,297
Net cash (used in) provided by investing activities	(29,739,414)	18,405,846
Cash Flows From Financing Activities:
Net increase (decrease) in deposits	12,553,137	(8,330,182)
Net increase (decrease) in overnight retail repurchase agreements	10,961,274	(3,370,673)
(Repayment of) proceeds from Federal Home Loan Bank advances, net	(23,000,000)	20,000,000
Net decrease in advance payments by borrowers for taxes and insurance	(2,890,759)	(2,170,539)
Proceeds from stock options excercised	63,958	209,931
Issuance of treasury shares to equity trust	236,280	179,973
Excess tax benefit from stock based compensation		1,286
Tax expense (cost) for release of equity trust shares	12,045	(1,334)
Dividends paid on common stock	(2,160,986)	(2,146,324)
Dividends paid on preferred stock	(635,450)	(813,450)
Common stock purchased under dividend reinvestment plan		(11,033)
Commission on shares purchased reinvestment plan	(11,710)
Common stock surrendered to satisfy tax withholding obligations of stock-based compensation	(397,865)	(99,160)
Net cash (used in) provided by financing activities	(5,270,076)	3,448,495
Net increase (decrease) in cash and cash equivalents	7,772,554	(10,949,658)
Cash and cash equivalents at beginning of period	62,334,922	57,071,006
Cash and cash equivalents at end of period	70,107,476	46,121,348
Cash paid during the period for:
Interest on deposits	2,855,383	4,079,313
Interest on borrowed money	473,288	472,253
Interest on subordinated debentures	255,631	268,218
Cash paid during the period for interest	3,584,302	4,819,784
Income taxes, net	4,205,000	1,842,887
Noncash Investing Activities:
Real estate acquired in settlement of loans receivable	5,349,554	2,702,751
Loans made to facilitate the sale of real estate acquired in settlement of loans receivable	$ 394,050	$ 1,660,323