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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2015
Calculation for Basic and Diluted Earnings per Common Share | The following table presents the calculation of basic and diluted earnings per common share for the periods indicated:
|  | Year Ended December 31, |
(Amounts in thousands, except share and per share data) |  | 2015 |  |  | 2014 |  |  | 2013 |
Net income |  | $ | 24,540 |  |  | $ | 25,490 |  |  | $ | 23,312 |
Dividends on preferred stock |  |  | 105 |  |  |  | 910 |  |  |  | 1,024 |
Net income available to common shareholders |  | $ | 24,435 |  |  | $ | 24,580 |  |  | $ | 22,288 |
Weighted average number of common shares outstanding, basic |  |  | 18,531,039 |  |  |  | 18,406,363 |  |  |  | 19,792,099 |
Dilutive effect of potential common shares from: |  |  |  |  |  |  |  |  |  |  |  |
Stock options |  |  | 26,487 |  |  |  | 18,607 |  |  |  | 19,337 |
Restricted stock |  |  | 2,996 |  |  |  | 461 |  |  |  | 5,014 |
Convertible preferred stock |  |  | 166,942 |  |  |  | 1,046,175 |  |  |  | 1,132,998 |
Contingently issuable shares |  |  | — |  |  |  | 11,448 |  |  |  | 12,352 |
Weighted average number of common shares outstanding, diluted |  |  | 18,727,464 |  |  |  | 19,483,054 |  |  |  | 20,961,800 |
Basic earnings per common share |  | $ | 1.32 |  |  | $ | 1.34 |  |  | $ | 1.13 |
Diluted earnings per common share |  | $ | 1.31 |  |  | $ | 1.31 |  |  | $ | 1.11 |
Antidilutive potential common shares: |  |  |  |  |  |  |  |  |  |  |  |
Stock options |  |  | 127,882 |  |  |  | 222,651 |  |  |  | 317,420 |
Restricted stock |  |  | — |  |  |  | — |  |  |  | 271 |
Total potential antidilutive shares |  |  | 127,882 |  |  |  | 222,651 |  |  |  | 317,691 |

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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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