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Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (USD $) | Preferred Stock [Member] Series F Noncumulative Perpetual Preferred Stock [Member] | Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] Series F Noncumulative 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] | 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 | 3,265,144
Other comprehensive income (loss), net of tax |  |  |  |  |  |  | (836,358) |  |  | (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 |
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 | 147,576,780
Net income |  |  |  |  |  | 3,889,215 |  |  |  | 3,889,215 | 3,889,215
Other comprehensive income (loss), net of tax |  |  |  |  |  |  | 5,230,784 |  |  | 5,230,784 | 5,230,784
Preferred cash dividends declared and accrued |  |  |  |  |  | (708,008) |  |  |  | (708,008) |
Redemption of 15,000 shares of Series F 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-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 | $ 141,357,027

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