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4. Net Earnings Per Share | 3 Months Ended
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Mar. 31, 2017
Earnings Per Share [Abstract] |
4. Net Earnings Per Share | Net earnings per share is based on the weighted average number of shares outstanding during the period while the effects of potential shares outstanding during the period are included in diluted earnings per share. The average market price during the year is used to compute equivalent shares. The reconciliation of the amounts used in the computation of both "basic earnings per share" and "diluted earnings per share" for the three months ended March 31, 2017 and 2016 is as follows:
For the three months ended March 31, 2017 |  |  |  |  |  |  |  |
|  | Net Earnings (Dollars in thousands) |  |  | Weighted Average Number of Shares |  |  | Per Share Amount
Basic earnings per share |  | $ | 2,205 |  |  |  | 5,427,278 |  |  | $ | 0.41
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |
Restricted stock units |  |  | - |  |  |  | 83,764 |  |  |  |
Diluted earnings per share |  | $ | 2,205 |  |  |  | 5,511,042 |  |  | $ | 0.40
For the three months ended March 31, 2016 |  |  |  |  |  |  |  |  |  |  |
|  | Net Earnings (Dollars in thousands) |  |  | Weighted Average Number of Shares |  |  | Per Share Amount
Basic earnings per share |  | $ | 2,453 |  |  |  | 5,510,538 |  |  | $ | 0.45
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |
Restricted stock units |  |  | - |  |  |  | 62,599 |  |  |  |
Diluted earnings per share |  | $ | 2,453 |  |  |  | 5,573,137 |  |  | $ | 0.44

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