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Computation of Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2017
Earnings Per Share [Abstract] |
Calculation of Basic and Diluted Earnings Per Share | The calculation of basic and diluted earnings per share for the three and nine months ended September 30, 2017 and 2016 was as follows:
|  | Three Months Ended September 30 |  |  | Nine Months Ended September 30 |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 6,278 |  |  | $ | 4,742 |  |  | $ | 11,952 |  |  | $ | 10,154 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Determination of shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average common shares outstanding |  |  | 5,104 |  |  |  | 5,146 |  |  |  | 5,113 |  |  |  | 5,180 |
Dilutive effect - share-based awards |  |  | 16 |  |  |  | 23 |  |  |  | 16 |  |  |  | 20 |
Diluted weighted-average common shares outstanding |  |  | 5,120 |  |  |  | 5,169 |  |  |  | 5,129 |  |  |  | 5,200 |
Earnings per common share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.23 |  |  | $ | 0.92 |  |  | $ | 2.34 |  |  | $ | 1.96 |
Diluted |  | $ | 1.23 |  |  | $ | 0.92 |  |  | $ | 2.33 |  |  | $ | 1.95 |

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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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