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Earnings Per Common Share Computations (Tables) | 6 Months Ended
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Jun. 30, 2014
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):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2014 |  | 2013 |  | 2014 |  | 2013
Numerator for basic earnings from continuing operations per common share |  |  |  |  |  |  |
Earnings from continuing operations | $ | 57,333 |  |  | $ | 50,309 |  |  | $ | 56,633 |  |  | $ | 51,398 |
Earnings from continuing operations allocated to participating securities | (674 | ) |  | (1,170 | ) |  | (668 | ) |  | (1,198 | )
Numerator for basic earnings from continuing operations per common share | $ | 56,659 |  |  | $ | 49,139 |  |  | $ | 55,965 |  |  | $ | 50,200 |
Numerator for basic earnings per common share |  |  |  |  |  |  |
Net earnings | $ | 57,333 |  |  | $ | 50,298 |  |  | $ | 56,633 |  |  | $ | 51,356 |
Net earnings allocated to participating securities | (674 | ) |  | (1,170 | ) |  | (668 | ) |  | (1,198 | )
Numerator for basic net earnings per common share | $ | 56,659 |  |  | $ | 49,128 |  |  | $ | 55,965 |  |  | $ | 50,158 |
Numerator for diluted earnings from continuing operations per common share | $ | 57,333 |  |  | $ | 50,298 |  |  | $ | 56,633 |  |  | $ | 51,398 |
Numerator for diluted earnings per common share | $ | 57,333 |  |  | $ | 50,298 |  |  | $ | 56,633 |  |  | $ | 51,356 |
Denominator for net earnings per common share: |  |  |  |  |  |  |
Basic | 17,531 |  |  | 17,268 |  |  | 17,475 |  |  | 17,239 |
Plus dilutive effect of stock options | 140 |  |  | 242 |  |  | 200 |  |  | 232 |
Plus dilutive effect of participating securities | 209 |  |  | 411 |  |  | 209 |  |  | 411 |
Diluted | 17,880 |  |  | 17,921 |  |  | 17,884 |  |  | 17,882 |
Earnings per common share: |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |
Net earnings | $ | 3.23 |  |  | $ | 2.85 |  |  | $ | 3.20 |  |  | $ | 2.91 |
Diluted |  |  |  |  |  |  |
Net earnings | $ | 3.21 |  |  | $ | 2.81 |  |  | $ | 3.17 |  |  | $ | 2.87 |

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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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