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Basic and Diluted Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Basic and Diluted Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  |  |  |  | Year ended December 31
(Dollars in thousands, except share and per share data) |  |  | 2017 |  |  | 2016
Basic and diluted: |  |  |  |  |  |
Net earnings |  | $ | 7,846 |  | $ | 8,150
Weighted average common shares outstanding |  |  | 3,643,616 |  |  | 3,643,504
| Net earnings per share |  | $ | 2.15 |  | $ | 2.24

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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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