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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
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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.

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