CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating activities:
Net income (loss)	$ 35,977,570	$ (28,096,281)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Net amortization/accretion of premium/discount on securities	5,474,970	3,445,502
Depreciation and amortization	8,221,400	8,757,803
Provision for loan losses	16,358,767	48,523,927
Gain on loan sales, net	(2,693,913)	(3,067,581)
Gain on sale of investment securities, net	(827,708)	(2,623,674)
Stock-based compensation expense	3,905,168	3,047,631
Deferred tax expense (benefit)	(20,236,438)	17,812,548
Losses on other real estate and other investments	11,242,202	19,334,546
Excess tax benefit from stock compensation	(10,010)	(10,358)
Mortgage loans held for sale:
Loans originated	(249,141,853)	(307,729,185)
Loans sold	244,202,474	301,434,231
Increase in other assets	23,678,737	11,887,367
Increase in other liabilities	11,020,122	20,536,331
Net cash provided by operating activities	87,171,488	93,252,807
Activities in securities available-for-sale:
Purchases	(252,396,360)	(422,982,104)
Sales	158,418,558	146,082,535
Maturities, prepayments and calls	179,823,239	262,564,699
Activities in securities held-to-maturity:
Sales	0	954,388
Maturities, prepayments and calls	1,719,998	1,240,565
Decrease (increase) in loans, net	(79,929,662)	186,760,840
Purchases of software, premises and equipment	(1,662,017)	(7,674,801)
Other investments	(393,304)	(1,873,641)
Net cash provided by investing activities	5,580,452	165,072,481
Financing activities:
Net (decrease) increase in deposits	(120,365,027)	2,229,029
Net decrease in securities sold under agreements to repurchase	(17,340,629)	(84,073,048)
Advances from Federal Home Loan Bank:
Issuances	50,000,000	90,000,000
Payments/maturities	(10,218,835)	(181,130,196)
Preferred dividends paid	(3,562,498)	(3,562,500)
Exercise of common stock options and stock appreciation rights	674,241	2,173,059
Excess tax benefit from stock compensation	10,010	10,358
Net cash used in financing activities	(100,802,738)	(174,353,298)
Net increase (decrease) in cash and cash equivalents	(8,050,798)	83,971,990
Cash and cash equivalents, beginning of period	188,586,181	166,602,074
Cash and cash equivalents, end of period	$ 180,535,383	$ 250,574,064