Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 6,676,228	$ 5,004,698
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,198,809	1,285,282
Provision for loan/lease losses	1,828,915	2,739,885
Amortization of offering costs on subordinated debentures	7,158	7,158
Stock-based compensation expense	503,514	397,927
Losses on sales of other real estate owned, net	578,669	132,754
Amortization of premiums on securities, net	2,050,358	1,704,629
Securities gains	(104,600)	(1,028,914)
Other-than-temporary impairment losses on securities	62,400	118,847
Loans originated for sale	(51,881,417)	(43,161,215)
Proceeds on sales of loans	52,645,621	56,509,458
Gains on sales of loans, net	(1,281,411)	(1,514,821)
Prepayment fees on Federal Home Loan Bank advances		832,099
Increase in accrued interest receivable	(225,305)	(119,254)
Increase in cash value of bank-owned life insurance	(797,062)	(701,053)
Increase (decrease) in other assets	(5,932,610)	3,010,526
Decrease in other liabilities	(738,366)	(537,175)
Net cash provided by operating activities	4,590,901	24,680,831
CASH FLOWS FROM INVESTING ACTIVITIES
Net decrease in federal funds sold	17,160,000	53,960,000
Net (increase) decrease in interest-bearing deposits at financial institutions	(1,701,827)	12,452,616
Proceeds from sales of other real estate owned	814,071	2,618,237
Activity in securities portfolio:
Purchases	(311,369,517)	(299,119,217)
Calls, maturities and redemptions	201,683,047	162,834,446
Paydowns	14,403,547	2,430,154
Sales	19,215,075	45,725,084
Activity in restricted investment securities:
Purchases	(1,003,850)	(57,300)
Redemptions	1,033,100	1,266,800
Purchases of bank-owned life insurance		(7,000,000)
Net increase in loans/leases originated and held for investment	(16,077,756)	(31,137,089)
Purchase of premises and equipment	(898,464)	(700,230)
Net cash used in investing activities	(76,742,574)	(56,726,499)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposit accounts	110,012,711	99,498,515
Net decrease in short-term borrowings	(28,137,412)	(18,759,955)
Activity in Federal Home Loan Bank advances:
Advances	14,000,000
Calls and maturities	(15,000,000)	(19,000,000)
Prepayments		(15,832,099)
Net increase (decrease) in other borrowings	2,004,050	(9,154,734)
Payment of cash dividends on common and preferred stock	(2,278,183)	(2,014,345)
Redemption of 10,223 shares of Series F Noncumulative Perpetual Preferred Stock	(10,223,000)
Proceeds from issuance of common stock, net	276,471	358,153
Net cash provided by financing activities	70,654,637	35,095,535
Net increase (decrease) in cash and due from banks	(1,497,036)	3,049,867
Cash and due from banks, beginning	53,136,710	42,030,806
Cash and due from banks, ending	51,639,674	45,080,673
Supplemental disclosure of cash flow information, cash payments for:
Interest	10,343,656	12,824,212
Income/franchise taxes	881,000	1,162,609
Supplemental schedule of noncash investing activities:
Change in accumulated other comprehensive income, unrealized gains (losses) on securities available for sale, net	(276,190)	1,064,174
Transfers of loans to other real estate owned	$ 2,143,017	$ 4,646,402