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Earnings per Share (Tables) | 9 Months Ended
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Sep. 30, 2017
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | A reconciliation of the numerators and denominators of the basic and diluted earnings per common share computations for the three and nine months ended September 30, 2017 and 2016 are as follows:
|  | Three Months Ended |  |  | Nine Months Ended |
(Dollars in thousands, except per share data) |  | September 30, |  |  | September 30, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Basic earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income as reported |  | $ | 2,248 |  |  | $ | 2,328 |  |  | $ | 7,075 |  |  | $ | 6,813 |
Weighted average common shares outstanding |  |  | 2,864,007 |  |  |  | 2,860,157 |  |  |  | 2,863,806 |  |  |  | 2,858,019 |
Basic earnings per common share |  | $ | 0.78 |  |  | $ | 0.81 |  |  | $ | 2.47 |  |  | $ | 2.38 |
Diluted earnings per common share: |  |  |  |  |  |  |  |  |  |  | - |  |  |  |  |
Net income as reported |  | $ | 2,248 |  |  | $ | 2,328 |  |  | $ | 7,075 |  |  | $ | 6,813 |
Weighted average common shares outstanding |  |  | 2,864,007 |  |  |  | 2,860,157 |  |  |  | 2,863,806 |  |  |  | 2,858,019 |
Add: Dilutive effect of assumed stock option exercises |  |  | 155 |  |  |  | 750 |  |  |  | 147 |  |  |  | 750 |
Weighted average common and dilutive |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
potential common shares outstanding |  |  | 2,864,162 |  |  |  | 2,860,907 |  |  |  | 2,863,953 |  |  |  | 2,858,769 |
Diluted earnings per common share |  | $ | 0.78 |  |  | $ | 0.81 |  |  | $ | 2.47 |  |  | $ | 2.38 |

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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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