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] Restricted Stock [Member] Exchange [Member]	Common Stock [Member] Exchange [Member]	Common Stock [Member]	Additional Paid-in Capital [Member] Restricted Stock [Member] Exchange [Member]	Additional Paid-in Capital [Member] Exchange [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Restricted Stock [Member] Exchange [Member]	Exchange [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											(810,837)					(810,837)
Proceeds from issuance of shares 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 shares of common stock as a result of stock options exercised							19,278			153,550						172,828
Stock 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 restricted stock vested, net						(7,048)	(16,798)		(111,628)	(289,113)					(118,676)	(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											(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 shares 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 shares of common stock as a result of stock options exercised							3,769			33,070						36,839
Stock 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
Net income											3,811,944					3,811,944
Other comprehensive income (loss), net of tax												(818,191)				(818,191)
Preferred cash dividends declared											(810,837)					(810,837)
Proceeds from issuance of shares of common stock as a result of stock purchased under the Employee Stock Purchase Plan							5,973			65,116						71,089
Proceeds from issuance of shares of common stock as a result of stock options exercised							7,230			76,718						83,948
Stock compensation expense										163,585						163,585
Tax benefit of nonqualified stock options exercised										6,026						6,026
Restricted stock awards							332			(332)
Balance at Sep. 30, 2013				54,867			5,931,848			91,825,249	61,787,378	(10,039,355)	(1,606,510)			147,953,477
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											(708,008)					(708,008)
Redemption of shares of Series F Noncumulative Perpetual Preferred Stock	(15,000)	(14,985,000)	(15,000,000)
Proceeds from issuance of shares 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 shares of common stock as a result of stock options exercised							9,814			85,582						95,396
Stock 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 restricted stock vested, net					(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
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											(373,869)					(373,869)
Redemption of shares of Series F Noncumulative Perpetual Preferred Stock	(14,867)	(14,809,055)	(14,823,922)
Proceeds from issuance of shares 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 shares of common stock as a result of stock options exercised							630			5,159						5,789
Stock 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
Net income											4,062,665					4,062,665
Other comprehensive income (loss), net of tax												(812,175)				(812,175)
Proceeds from issuance of shares of common stock as a result of stock purchased under the Employee Stock Purchase Plan							5,481			78,533						84,014
Proceeds from issuance of shares of common stock as a result of stock options exercised							2,400			19,097						21,497
Stock compensation expense										176,257						176,257
Tax benefit of nonqualified stock options exercised										5,189						5,189
Restricted stock awards							289			(289)
Balance at Sep. 30, 2014							$ 8,058,059			$ 61,277,831	$ 75,199,959	$ (4,749,363)	$ (1,606,510)			$ 138,179,976