Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $)	Series F Noncumulative Perpetual Preferred Stock Redemption Two[Member] Preferred Stock [Member]	Series F Noncumulative Perpetual Preferred Stock Redemption Two[Member] Additional Paid-in Capital [Member]	Series F Noncumulative Perpetual Preferred Stock Redemption Two[Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2012				$ 54,867	$ 5,039,448	$ 78,912,791	$ 53,326,542	$ 4,706,683	$ (1,606,510)	$ 140,433,821
Net income							3,265,144			3,265,144
Other comprehensive income (loss), net of tax								(836,358)		(836,358)
Preferred cash dividends declared and accrued							(810,837)			(810,837)
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan					5,884	63,487				69,371
Proceeds from issuance of common stock as a result of stock options exercised					19,278	153,550				172,828
Exchange of 7,048 shares of common stock in connection with stock options exercised					(7,048)	(111,628)				(118,676)
Stock-based compensation expense						293,798				293,798
Tax benefit of nonqualified stock options exercised						35,251				35,251
Restricted stock awards					16,798	(16,798)
Exchange of shares of common stock in connection with payroll taxes for restricted stock					(16,798)	(289,113)				(305,911)
Balance at Mar. 31, 2013				54,867	5,057,562	79,041,338	55,780,849	3,870,325	(1,606,510)	142,198,431
Net income							4,045,231			4,045,231
Other comprehensive income (loss), net of tax								(13,091,489)		(13,091,489)
Common cash dividends declared							(228,971)			(228,971)
Preferred cash dividends declared and accrued							(810,838)			(810,838)
Proceeds from issuance of 834,715 shares of common stock as a result of the acquisition of Community National Bancorporation, net					834,715	12,181,894				13,016,609
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan					9,560	104,221				113,781
Proceeds from issuance of common stock as a result of stock options exercised					3,769	33,070				36,839
Stock-based compensation expense						162,123				162,123
Tax benefit of nonqualified stock options exercised						4,197				4,197
Restricted stock awards					12,707	(12,707)
Balance at Jun. 30, 2013				54,867	5,918,313	91,514,136	58,786,271	(9,221,164)	(1,606,510)	145,445,913
Balance at Dec. 31, 2013				29,867	8,005,708	90,154,528	64,637,173	(13,643,986)	(1,606,510)	147,576,780
Net income							3,889,215			3,889,215
Other comprehensive income (loss), net of tax								5,230,784		5,230,784
Preferred cash dividends declared and accrued							(708,008)			(708,008)
Redemption of preferred stock	(15,000)	(14,985,000)	(15,000,000)
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan					6,189	78,256				84,445
Proceeds from issuance of common stock as a result of stock options exercised					9,814	85,582				95,396
Stock-based compensation expense						347,752				347,752
Tax benefit of nonqualified stock options exercised						18,647				18,647
Restricted stock awards					27,197	(27,197)
Exchange of shares of common stock in connection with payroll taxes for restricted stock					(10,300)	(167,684)				(177,984)
Balance at Mar. 31, 2014				14,867	8,038,608	75,504,884	67,818,380	(8,413,202)	(1,606,510)	141,357,027
Balance at Dec. 31, 2013				29,867					(1,606,510)	147,576,780
Net income										7,897,051
Other comprehensive income (loss), net of tax										9,706,798
Redemption of preferred stock	(14,867)	(14,809,055)	(14,823,922)
Balance at Jun. 30, 2014									(1,606,510)	134,642,529
Balance at Mar. 31, 2014				14,867	8,038,608	75,504,884	67,818,380	(8,413,202)	(1,606,510)	141,357,027
Net income							4,007,836			4,007,836
Other comprehensive income (loss), net of tax								4,476,014		4,476,014
Common cash dividends declared							(315,053)			(315,053)
Preferred cash dividends declared and accrued							(373,869)			(373,869)
Redemption of preferred stock	(14,867)	(14,809,055)	(14,823,922)
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan					8,361	119,797				128,158
Proceeds from issuance of common stock as a result of stock options exercised					630	5,159				5,789
Stock-based compensation expense						179,265				179,265
Tax benefit of nonqualified stock options exercised						1,284				1,284
Restricted stock awards					2,290	(2,290)
Balance at Jun. 30, 2014					$ 8,049,889	$ 60,999,044	$ 71,137,294	$ (3,937,188)	$ (1,606,510)	$ 134,642,529