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Nature of Operations and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2012
Nature of Operations and Summary of Significant Accounting Policies [Abstract] |
Summary of computation of basic and diluted earnings per share |
|  | December 31 |  |  | December 31 |  |  | December 31 |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Basic earnings per share |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 19,543 |  |  | $ | 12,797 |  |  | $ | 10,455 |
Less: Preferred stock dividends and accretion of discount |  |  | 481 |  |  |  | 1,325 |  |  |  | 1,406 |
Net income available to common shareholders |  | $ | 19,062 |  |  | $ | 11,472 |  |  | $ | 9,049 |
Weighted average common shares outstanding (1)(2) |  |  | 7,974,241 |  |  |  | 7,407,258 |  |  |  | 7,373,405 |
Basic earnings per share |  | $ | 2.39 |  |  | $ | 1.55 |  |  | $ | 1.23 |
Diluted earnings per share |  |  |  |  |  |  |  |  |  |  |  |
Net income available to common shareholders |  | $ | 19,062 |  |  | $ | 11,472 |  |  | $ | 9,049 |
Weighted average common shares outstanding (1)(2) |  |  | 7,974,241 |  |  |  | 7,407,258 |  |  |  | 7,373,405 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Warrants |  |  | 245,514 |  |  |  | 161,922 |  |  |  | 90,981 |
Restricted stock |  |  | 23,181 |  |  |  | 4,361 |  |  |  | 33,041 |
Stock options |  |  | 28,241 |  |  |  | 14,853 |  |  |  | 5,418 |
Weighted average shares outstanding |  |  | 8,271,177 |  |  |  | 7,588,394 |  |  |  | 7,502,846 |
Diluted earnings per share |  | $ | 2.30 |  |  | $ | 1.51 |  |  | $ | 1.21 |
(1) | Adjusted for 3:2 stock splits on November 9, 2012 and December 9, 2011
(2) | Includes average shares issued for the Heartland acquisition for the year ended December 31, 2012

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