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Nature of Operations and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2014
Accounting Policies [Abstract] |
Summary of Computation of Basic and Diluted Earnings Per Share | The following table shows computation of basic and diluted earnings per share.
|  | Years Ended December 31 |
|  | 2014 |  |  | 2013 |  |  | 2012 |
Basic earnings per share |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 18,101 |  |  | $ | 19,876 |  |  | $ | 19,543 |
Less: Preferred stock dividends |  |  | 133 |  |  |  | 370 |  |  |  | 481 |
Net income available to common shareholders |  | $ | 17,968 |  |  | $ | 19,506 |  |  | $ | 19,062 |
Weighted average common shares outstanding |  |  | 9,060,702 |  |  |  | 8,619,330 |  |  |  | 7,974,241 |
Basic earnings per share |  | $ | 1.98 |  |  | $ | 2.26 |  |  | $ | 2.39 |
Diluted earnings per share |  |  |  |  |  |  |  |  |  |  |  |
Net income available to common shareholders |  | $ | 17,968 |  |  | $ | 19,506 |  |  | $ | 19,062 |
Weighted average common shares outstanding |  |  | 9,060,702 |  |  |  | 8,619,330 |  |  |  | 7,974,241 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Warrants |  |  | 315,679 |  |  |  | 303,970 |  |  |  | 245,514 |
Restricted stock |  |  | 39,476 |  |  |  | 40,160 |  |  |  | 23,181 |
Stock options |  |  | 38,268 |  |  |  | 37,503 |  |  |  | 28,241 |
Weighted average shares outstanding |  |  | 9,454,125 |  |  |  | 9,000,963 |  |  |  | 8,271,177 |
Diluted earnings per share |  | $ | 1.90 |  |  | $ | 2.17 |  |  | $ | 2.30 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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