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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2012
Earnings Per Share [Abstract] |
Computation of basic and diluted earnings per share | The following table sets forth the computation of basic and diluted earnings per share:
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30 |  |  | September 30 |
(in thousands except per share data) |  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 10,209 |  |  | $ | 10,665 |  |  | $ | 34,310 |  |  | $ | 28,939 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares |  |  | 15,491 |  |  |  | 15,318 |  |  |  | 15,450 |  |  |  | 15,307 |
Diluted earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effect of dilutive stock options |  |  | 64 |  |  |  | 21 |  |  |  | 51 |  |  |  | 24 |
Adjusted weighted average shares |  |  | 15,555 |  |  |  | 15,339 |  |  |  | 15,501 |  |  |  | 15,331 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share |  | $ | 0.66 |  |  | $ | 0.70 |  |  | $ | 2.22 |  |  | $ | 1.89 |
Diluted earnings per share |  |  | 0.66 |  |  |  | 0.70 |  |  |  | 2.21 |  |  |  | 1.89 |

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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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