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Earnings Per Common Share Computations (Tables) | 12 Months Ended
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Dec. 31, 2012
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following is a reconciliation of the numerator and denominator of the earnings per common share computations (in thousands, except per share data):
| Year Ended December 31,
| 2012 |  | 2011 |  | 2010
Numerator for basic earnings from continuing operations per common share: |  |  |  |  |
Earnings from continuing operations | $ | 58,277 |  |  | $ | 60,795 |  |  | $ | 19,557 |
Earnings from continuing operations allocated to participating securities | (519 | ) |  | (1,103 | ) |  | (330 | )
Numerator for basic earnings from continuing operations per common share | $ | 57,758 |  |  | $ | 59,692 |  |  | $ | 19,227 |
Numerator for basic earnings per common share: |  |  |  |  |
Net earnings | $ | 58,276 |  |  | $ | 64,355 |  |  | $ | 16,353 |
Net earnings allocated to participating securities | (519 | ) |  | (1,180 | ) |  | (237 | )
Numerator for basic net earnings per common share | $ | 57,757 |  |  | $ | 63,175 |  |  | $ | 16,116 |
Numerator for diluted earnings from continuing operations per common share: |  |  |  |  |
Earnings from continuing operations | $ | 58,277 |  |  | $ | 60,795 |  |  | $ | 19,557 |
Interest expense on participating securities | — |  |  | — |  |  | 136 |
Numerator for diluted earnings from continuing operations per common share | $ | 58,277 |  |  | $ | 60,795 |  |  | $ | 19,693 |
Numerator for diluted earnings per common share: |  |  |  |  |
Net earnings | $ | 58,276 |  |  | $ | 64,355 |  |  | $ | 16,353 |
Interest expense on participating securities | — |  |  | — |  |  | 136 |
Numerator for diluted earnings per common share | $ | 58,276 |  |  | $ | 64,355 |  |  | $ | 16,489 |
Denominator for net earnings per common share: |  |  |  |  |
Basic | 17,047 |  |  | 16,638 |  |  | 15,186 |
Plus dilutive effect of stock options and restricted stock | 233 |  |  | 118 |  |  | 27 |
Plus dilutive effect of participating securities and convertible note | 195 |  |  | 369 |  |  | 453 |
Diluted | 17,475 |  |  | 17,125 |  |  | 15,666 |
Earnings (loss) per common share: |  |  |  |  |
Basic |  |  |  |  |
Earnings from continuing operations | $ | 3.39 |  |  | $ | 3.59 |  |  | $ | 1.27 |
Discontinued operations | — |  |  | 0.21 |  |  | (0.21 | )
Net earnings | $ | 3.39 |  |  | $ | 3.80 |  |  | $ | 1.06 |
Diluted |  |  |  |  |
Earnings from continuing operations | $ | 3.34 |  |  | $ | 3.55 |  |  | $ | 1.26 |
Discontinued operations | — |  |  | 0.21 |  |  | (0.21 | )
Net earnings | $ | 3.34 |  |  | $ | 3.76 |  |  | $ | 1.05 |

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