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Per Share Data (Tables) | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Calculation Of Basic And Diluted Earnings Per Share | The following table presents information necessary to calculate basic and diluted earnings per share for the periods indicated:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(in thousands, except per share amounts) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Earnings per common share calculation – basic |  |  |  |  |  |  |  |
Income from continuing operations attributable to common shareholders |  | $ | 38,671 |  |  | $ | 39,188 |  |  | $ | 78,066 |  |  | $ | 74,049 |
Amount allocated to participating securities |  | (282 | ) |  | (74 | ) |  | (547 | ) |  | (112 | )
Net income attributable to common shareholders – basic |  | $ | 38,389 |  |  | $ | 39,114 |  |  | $ | 77,519 |  |  | $ | 73,937 |
Total earnings per common share – basic |  | $ | 0.40 |  |  | $ | 0.43 |  |  | $ | 0.81 |  |  | $ | 0.82 |
Weighted average number of common shares outstanding – basic |  | 95,243 |  |  | 90,105 |  |  | 95,155 |  |  | 90,015 |
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(in thousands, except per share amounts) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Earnings per common share calculation – diluted |  |  |  |  |  |  |  |
Income from continuing operations attributable to common shareholders, net of amount allocated to participating securities |  | $ | 38,389 |  |  | $ | 39,114 |  |  | $ | 77,519 |  |  | $ | 73,937 |
Income allocated to common units from continuing operations |  | — |  |  | 302 |  |  | — |  |  | 575 |
Net income attributable to common shareholders – diluted |  | $ | 38,389 |  |  | $ | 39,416 |  |  | $ | 77,519 |  |  | $ | 74,512 |
Total earnings per common share – diluted |  | $ | 0.40 |  |  | $ | 0.43 |  |  | $ | 0.81 |  |  | $ | 0.82 |
Weighted average number of common shares outstanding – basic |  | 95,243 |  |  | 90,105 |  |  | 95,155 |  |  | 90,015 |
Incremental shares issuable from assumed conversion of: |  |  |  |  |  |  |  |
Common share options and share awards granted |  | 94 |  |  | 131 |  |  | 134 |  |  | 175 |
Common units |  | — |  |  | 805 |  |  | — |  |  | 805 |
Weighted average number of common shares outstanding – diluted |  | 95,337 |  |  | 91,041 |  |  | 95,289 |  |  | 90,995 |

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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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