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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Calculation of Basic Earnings Per Share | The table below presents basic and diluted earnings per share for the years ended December 31, 2017, 2016, and 2015.
|  | Year Ended |
|  | December 31, 2017 |  |  | December 31, 2016 |  |  | December 31, 2015 |
Earnings per share |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 12,720 |  |  | $ | 11,664 |  |  | $ | 10,340 |
Less: distributed earnings allocated to participating securities |  |  | (45 | ) |  |  | (37 | ) |  |  | (31 | )
Less: undistributed earnings allocated to participating securities |  |  | (77 | ) |  |  | (64 | ) |  |  | (47 | )
Net earnings available to common shareholders |  | $ | 12,598 |  |  | $ | 11,563 |  |  | $ | 10,262 |
Weighted average common shares outstanding including participating securities |  |  | 9,250,825 |  |  |  | 9,224,230 |  |  |  | 9,234,116 |
Less: average unvested restricted shares (1) |  |  | (88,664 | ) |  |  | (79,964 | ) |  |  | (70,000 | )
Weighted average common shares outstanding (1) |  |  | 9,162,161 |  |  |  | 9,144,266 |  |  |  | 9,164,116 |
Basic and diluted earnings per share (1) |  | $ | 1.38 |  |  | $ | 1.27 |  |  | $ | 1.12 |
(1) | Share data has been adjusted to reflect a 2-for-1 stock split on September 20, 2017

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- Definition Tabular disclosure of the effect of income (loss) on basic earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=96948231&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1252-109256 + Details
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