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Consolidated Statement of Changes in Stockholders' Equity (Parentheticals) (USD $) | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2012 Preferred Stock [Member] Series F Noncumulative Perpetual Preferred Stock [Member] | Dec. 31, 2011 Preferred Stock [Member] Series F Noncumulative Perpetual Preferred Stock [Member] | Dec. 31, 2011 Preferred Stock [Member] Series D Cumulative Perpetual Preferred Stock [Member] | Dec. 31, 2013 Preferred Stock [Member] Series E Non-Cumulative Perpetual Preferred Stock [Member] | Dec. 31, 2013 Common Stock [Member] | Dec. 31, 2012 Common Stock [Member] | Dec. 31, 2011 Common Stock [Member] | Dec. 31, 2011 Warrants Associated With Series D Cumulative Perpetual Preferred Stock [Member]
Common cash dividends (in Dollars per share) | $ 0.08 |  |  |  |  |  |  |  |
Accretion on cumulative preferred stock (in Dollars) | $ 1,252,895 |  |  |  |  |  |  |  |
Share issuance |  |  | 40,090 |  |  |  |  |  |
Redemption, shares |  | 10,223 |  | 38,237 |  |  |  |  | 521,888
Share issuance, Employee Stock Purchase Plan |  |  |  |  |  | 27,110 | 31,554 | 36,174 |
Share issuance, stock options exercised | 36,459 |  |  |  |  | 41,258 | 17,876 | 36,459 |
Share exchange, stock options exercised |  |  |  |  |  | 7,679 | 611 | (2,550) |
Share exchange in connection with restricted stock |  |  |  |  |  | 16,798 | 576 |  |
Exercise of warrants |  |  |  |  |  |  | 54,000 |  |
Share issuance, acquisition |  |  |  |  |  | 834,715 |  |  |
Share conversion, shares converted |  |  |  |  | 25,000 |  |  |  |
Share conversion, shares issued |  |  |  |  |  | 2,057,502 |  |  |

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