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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2012
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings Per Share | The computations of Basic and Diluted Earnings per Share for the years ended December 31, were as follows:
| 2012 |  | 2011 |  | 2010
Numerator: |  |  |  |  |
Net Earnings | $ | 41,584 |  |  | $ | 32,713 |  |  | $ | 34,803 |
Denominator: |  |  |  |  |  |  |  |
Basic - Weighted Average Shares Outstanding | 18,544,896 |  |  | 18,832,693 |  |  | 18,805,494 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Employee stock options | 557,120 |  |  | 527,735 |  |  | 526,609 |
Diluted - Weighted Average Shares Outstanding | 19,102,016 |  |  | 19,360,428 |  |  | 19,332,103 |
Basic Earnings per Share | $ | 2.24 |  |  | $ | 1.74 |  |  | $ | 1.85 |
Diluted Earnings per Share | $ | 2.18 |  |  | $ | 1.69 |  |  | $ | 1.80 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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