Consolidated Statement of Changes in Stockholders' Equity (USD $)		Preferred Stock [Member] Series F Noncumulative Perpetual Preferred Stock [Member]	Preferred Stock [Member] Series D Cumulative Perpetual Preferred Stock [Member]	Preferred Stock [Member] Series E Non-Cumulative Perpetual Preferred Stock [Member]	Preferred Stock [Member]	Common Stock [Member] Series A Subordinated Notes and Detachable Warrants [Member]	Common Stock [Member] Series E Non-Cumulative Perpetual Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member] Series F Noncumulative Perpetual Preferred Stock [Member]	Additional Paid-in Capital [Member] Series D Cumulative Perpetual Preferred Stock [Member]	Additional Paid-in Capital [Member] Warrants Associated With Series D Cumulative Perpetual Preferred Stock [Member]	Additional Paid-in Capital [Member] Series A Subordinated Notes and Detachable Warrants [Member]	Additional Paid-in Capital [Member] Series E Non-Cumulative Perpetual Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Treasury Stock [Member]	Series F Noncumulative Perpetual Preferred Stock [Member]	Series D Cumulative Perpetual Preferred Stock [Member]	Warrants Associated With Series D Cumulative Perpetual Preferred Stock [Member]	Series A Subordinated Notes and Detachable Warrants [Member]	Total
Balance at Dec. 31, 2010					$ 63,237			$ 4,732,428						$ 86,478,269	$ 40,550,900	$ 704,165	$ 1,648,219	$ (1,606,510)					$ 132,570,708
Net income															9,691,648		438,221						10,129,869
Other comprehensive income (loss), net of tax																4,050,549							4,050,549
Common cash dividends declared, $0.08 per share															(372,761)								(372,761)
Preferred cash dividends declared and accrued															(3,694,441)								(3,694,441)
Discount accretion on cumulative preferred stock *	[1]													1,589,444	(1,589,444)
Proceeds from issuance of 40,090 shares of Series F Non-Cumulative Perpetual Preferred Stock		40,090							39,956,832										39,996,922
Redemption of preferred stock			(38,237)							(38,198,763)	(1,100,000)									(38,237,000)	(1,100,000)
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan								36,174						207,592									243,766
Proceeds from issuance of common stock as a result of stock options exercised								36,459						216,765									253,224
Exchange of common stock in connection with stock options exercised								(2,550)						(17,101)									(19,651)
Stock-based compensation expense														646,419									646,419
Restricted stock awards								76,924						(76,924)
Distributions to noncontrolling interests																	(34,902)						(34,902)
Balance at Dec. 31, 2011					65,090			4,879,435						89,702,533	44,585,902	4,754,714	2,051,538	(1,606,510)					144,432,702
Net income															12,617,767		488,473						13,106,240
Other comprehensive income (loss), net of tax																(48,031)							(48,031)
Common cash dividends declared, $0.08 per share															(381,042)								(381,042)
Preferred cash dividends declared and accrued															(3,496,085)								(3,496,085)
Redemption of preferred stock		(10,223)							(10,212,777)										(10,223,000)
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan								31,554						249,316									280,870
Proceeds from issuance of common stock as a result of stock options exercised								17,876						155,428									173,304
Exchange of common stock in connection with stock options exercised								(611)						(7,125)									(7,736)
Exchange of shares of common stock in connection with payroll taxes for restricted stock								(576)						(2,103)									(2,679)
Proceeds from exercise of warrants to purchase 54,000 shares of common stock issued in conjunction with the Series A Subordinated Notes						54,000						486,000										540,000	540,000
Stock-based compensation expense														849,760									849,760
Restricted stock awards								57,770						(57,770)
Purchase of noncontrolling interest														(2,250,471)			(2,531,748)						(4,782,219)
Distributions to noncontrolling interests																	(8,263)						(8,263)
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															14,938,245								14,938,245
Other comprehensive income (loss), net of tax																(18,350,669)							(18,350,669)
Common cash dividends declared, $0.08 per share															(459,312)								(459,312)
Preferred cash dividends declared and accrued															(3,168,302)								(3,168,302)
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
Conversion of 25,000 shares of Series E Non-cumulative Perpetual Preferred Stock to 2,057,502 shares of common stock				(25,000)			2,057,502						(2,032,502)
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan								27,110						304,396									331,506
Proceeds from issuance of common stock as a result of stock options exercised								41,258						373,519									414,777
Exchange of common stock in connection with stock options exercised								(7,679)						(120,955)									(128,634)
Exchange of shares of common stock in connection with payroll taxes for restricted stock								(16,798)						(289,113)									(305,911)
Stock-based compensation expense														792,279									792,279
Tax benefit of nonqualified stock options exercised														62,371									62,371
Restricted stock awards								30,152						(30,152)
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

[1] Includes $1,252,895 of accelerated discount accretion as a result of redeeming Series D Cumulative Perpetual Preferred Stock.