Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 7,271,299	$ 5,138,642
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,866,403	1,926,876
Provision for loan/lease losses	5,196,850	4,413,650
Amortization of offering costs on subordinated debentures	10,738	10,738
Stock-based compensation expense	547,087	467,768
Losses on sales of other real estate owned, net	90,492	632,806
Amortization of premiums on securities, net	2,541,408	2,555,204
Securities gains	(1,472,528)
Other-than-temporary impairment losses on securities	118,847	113,800
Loans originated for sale	(65,240,469)	(103,689,462)
Proceeds on sales of loans	75,960,589	95,662,334
Gains on sales of loans, net	(1,923,185)	(1,831,856)
Prepayment fees on Federal Home Loan Bank advances	832,099
Losses on lease residual values		617,000
(Decrease) increase in accrued interest receivable	(376,868)	447,886
Decrease in prepaid FDIC insurance	1,362,876	1,788,261
Increase in cash value of bank-owned life insurance	(1,032,493)	(973,659)
Increase in other assets	(278,687)	(651,803)
Increase in other liabilities	955,174	1,504,602
Net cash provided by operating activities	26,429,632	8,132,787
CASH FLOWS FROM INVESTING ACTIVITIES
Net decrease (increase) in federal funds sold	56,170,000	(15,356,667)
Net decrease (increase) in interest-bearing deposits at financial institutions	15,080,252	(7,152,522)
Proceeds from sales of foreclosed assets	8,376,898	1,759,607
Activity in securities portfolio:
Purchases	(458,081,700)	(294,445,750)
Calls, maturities and redemptions	302,145,002	243,389,938
Paydowns	4,977,152	400,605
Sales	54,326,191
Activity in restricted investment securities:
Purchases	(245,000)	(1,704,350)
Redemptions	1,675,700	204,800
Activity in bank-owned life insurance:
Purchases	(7,000,000)	(3,150,000)
Surrender of policy		609,772
Net (increase) decrease in loans/leases originated and held for investment	(48,043,333)	51,105,615
Purchase of premises and equipment	(1,693,870)	(2,025,145)
Net cash used in investing activities	(72,312,708)	(26,364,097)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in deposit accounts	92,653,389	(2,589,804)
Net increase (decrease) in short-term borrowings	2,431,992	(14,481,044)
Activity in Federal Home Loan Bank advances:
Advances	5,000,000	36,000,000
Calls and maturities	(24,000,000)	(13,100,000)
Prepayments	(15,832,099)
Net (decrease) increase in other borrowings	(9,941,030)	7,536,866
Proceeds from issuance of Series A Subordinated Notes and detachable warrants to purchase 54,000 shares of common stock		2,700,000
Payment of cash dividends on common and preferred stock	(3,274,991)	(3,136,626)
Proceeds from issuance of common stock, net	409,379	183,507
Net cash provided by financing activities	49,283,981	16,300,132
Net increase (decrease) in cash and due from banks	3,400,905	(1,931,178)
Cash and due from banks, beginning	42,030,806	35,878,046
Cash and due from banks, ending	45,431,711	33,946,868
Supplemental disclosure of cash flow information, cash payments for:
Interest	18,521,222	23,362,893
Income/franchise taxes	1,196,948	1,497,611
Supplemental schedule of noncash investing activities:
Change in accumulated other comprehensive income, unrealized gains on securities available for sale, net	3,468,469	3,867,489
Transfers of loans to other real estate owned	8,220,271	5,442,568
Series E Preferred Stock [Member]
Activity in Federal Home Loan Bank advances:
Proceeds from issuance of Series E Noncumulative Convertible		3,187,233
Series F Preferred Stock [Member]
Activity in Federal Home Loan Bank advances:
Proceeds from issuance of Series F Noncumulative Perpetual Preferred Stock	40,074,341
Redemption of Series D Cumulative Perpetual Preferred Stock	40,074,341
Series D Preferred Stock [Member]
Activity in Federal Home Loan Bank advances:
Proceeds from issuance of Series F Noncumulative Perpetual Preferred Stock	(38,237,000)
Redemption of Series D Cumulative Perpetual Preferred Stock	$ (38,237,000)