Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 3,889,215	$ 3,265,144
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	692,562	584,884
Provision for loan/lease losses	1,094,162	1,057,782
Stock-based compensation expense	347,752	293,798
Deferred compensation expense accrued	347,850	204,794
Losses on other real estate owned, net	18,048	446,630
Amortization of premiums on securities, net	535,951	974,045
Securities gains	(20,625)
Loans originated for sale	(6,354,404)	(26,928,996)
Proceeds on sales of loans	7,678,600	30,382,098
Gains on sales of residential real estate loans	(63,487)	(291,151)
Gains on sales of government guaranteed portions of loans	(194,019)	(845,224)
Amortization of core deposit intangible	49,878
Accretion of acquisition fair value adjustments, net	(161,042)
Increase in cash value of bank-owned life insurance	(454,164)	(438,687)
Decrease in other assets	3,804,360	587,964
Decrease in other liabilities	(8,049,459)	(2,056,297)
Net cash provided by operating activities	3,161,178	7,236,784
CASH FLOWS FROM INVESTING ACTIVITIES
Net decrease in federal funds sold	27,865,000	26,560,000
Net increase in interest-bearing deposits at financial institutions	(11,344,360)	(11,422,165)
Proceeds from sales of other real estate owned	97,120	15,989
Activity in securities portfolio:
Purchases	(26,142,834)	(187,650,573)
Calls, maturities and redemptions	10,563,599	82,114,256
Paydowns	6,547,632	12,893,508
Sales	7,020,625
Activity in restricted investment securities:
Purchases	(1,040,000)	(1,743,750)
Redemptions	814,900	2,193,900
Net increase in loans/leases originated and held for investment	(33,066,658)	(7,125,623)
Purchase of premises and equipment	(563,035)	(775,714)
Net cash used in investing activities	(19,248,011)	(84,940,172)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposit accounts	24,915,536	46,379,158
Net increase in short-term borrowings	16,276,145	770,510
Advances	60,700,000	46,000,000
Calls and maturities	(56,350,000)	(43,000,000)
Net decrease in other borrowings	(200,000)
Payment of cash dividends on common and preferred stock	(941,177)	(1,002,789)
Net cash provided by financing activities	29,580,345	49,389,079
Net increase (decrease) in cash and due from banks	13,493,512	(28,314,309)
Cash and due from banks, beginning	41,950,790	61,568,446
Cash and due from banks, ending	55,444,302	33,254,137
Supplemental disclosure of cash flow information, cash payments for:
Interest	4,140,254	4,472,977
Income/franchise taxes	1,365,000	717,300
Supplemental schedule of noncash investing activities:
Change in accumulated other comprehensive income (loss), unrealized gains (losses) on securities available for sale, net	5,230,784	(836,358)
Exchange of shares of common stock in connection with payroll taxes for restricted stock and in connection with stock options exercised	(177,984)	(424,587)
Transfers of loans to other real estate owned	60,750	187,500
Series F Noncumulative Perpetual Preferred Stock [Member]
CASH FLOWS FROM FINANCING ACTIVITIES
Redemption of 15,000 shares of Series F Noncumulative Perpetual Preferred Stock, net	(15,000,000)
Common Stock [Member]
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of common stock, net	$ 179,841	$ 242,200