Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)	Series F Noncumulative Perpetual Preferred Stock [Member] Preferred Stock [Member]	Series F Noncumulative Perpetual Preferred Stock [Member] Additional Paid-in Capital [Member]	Series F Noncumulative Perpetual Preferred Stock [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Total
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, net of tax								5,230,784		5,230,784
Preferred cash dividends declared and accrued							(708,008)			(708,008)
Redemption of Noncumulative Perpetual 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 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					(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	8,005,708	90,154,528	64,637,173	(13,643,986)	(1,606,510)	147,576,780
Net income										7,897,051
Other comprehensive income, net of tax										9,706,798
Balance at Jun. 30, 2014					8,049,889	60,999,044	71,137,294	(3,937,188)	(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, net of tax								4,476,014		4,476,014
Preferred cash dividends declared and accrued							(373,869)			(373,869)
Redemption of Noncumulative Perpetual Preferred Stock	$ (14,867)	$ (14,809,055)	$ (14,823,922)
Common cash dividends declared							(315,053)			(315,053)
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 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
Balance at Dec. 31, 2014					8,074,443	61,668,968	77,876,824	(1,935,216)	(1,606,510)	144,078,509
Net income							4,177,889			4,177,889
Other comprehensive income, net of tax								2,220,865		2,220,865
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan					5,679	82,641				88,320
Proceeds from issuance of common stock as a result of stock options exercised					9,688	94,728				104,416
Stock compensation expense						367,775				367,775
Tax benefit of nonqualified stock options exercised						15,651				15,651
Restricted stock awards					26,502	(26,502)
Exchange of shares of common stock in connection with restricted stock vested					(3,272)	(54,188)				(57,460)
Balance at Mar. 31, 2015					8,113,040	62,149,073	82,054,713	285,649	(1,606,510)	150,995,965
Balance at Dec. 31, 2014					8,074,443	61,668,968	77,876,824	(1,935,216)	(1,606,510)	144,078,509
Net income										3,654,071
Other comprehensive income, net of tax										(158,056)
Balance at Jun. 30, 2015					11,819,824	122,511,186	81,066,189	(2,093,272)	(1,606,510)	211,697,417
Balance at Mar. 31, 2015					8,113,040	62,149,073	82,054,713	285,649	(1,606,510)	150,995,965
Net income							(523,818)			(523,818)
Other comprehensive income, net of tax								(2,378,921)		(2,378,921)
Common cash dividends declared							(464,706)			(464,706)
Proceeds from issuance of 3,680,000 shares of common stock, net of issuance costs					3,680,000	59,804,123				63,484,123
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan					8,558	128,927				137,485
Proceeds from issuance of common stock as a result of stock options exercised					17,240	238,717				255,957
Stock compensation expense						186,751				186,751
Tax benefit of nonqualified stock options exercised						15,827				15,827
Restricted stock awards					1,616	(1,616)
Exchange of shares of common stock in connection with restricted stock vested					(630)	(10,616)				(11,246)
Balance at Jun. 30, 2015					$ 11,819,824	$ 122,511,186	$ 81,066,189	$ (2,093,272)	$ (1,606,510)	$ 211,697,417