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Per Share Data (Tables) | 9 Months Ended
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Sep. 30, 2013
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 |  | Nine Months Ended
| September 30, |  | September 30,
(in thousands, except per share amounts) | 2013 |  | 2012 |  | 2013 |  | 2012
Earnings per share calculation – basic |  |  |  |  |  |  |
Income from continuing operations attributable to common shareholders | $ | 34,662 |  |  | $ | 26,814 |  |  | $ | 111,791 |  |  | $ | 98,391 |
Amount allocated to participating securities | (623 | ) |  | (288 | ) |  | (1,958 | ) |  | (1,387 | )
Income from continuing operations attributable to common shareholders, net of amount allocated to participating securities | $ | 34,039 |  |  | $ | 26,526 |  |  | $ | 109,833 |  |  | $ | 97,004 |
Income from discontinued operations, including gain on sale, attributable to common shareholders | 36,058 |  |  | 3,889 |  |  | 94,577 |  |  | 42,833 |
Net income attributable to common shareholders, as adjusted | $ | 70,097 |  |  | $ | 30,415 |  |  | $ | 204,410 |  |  | $ | 139,837 |
Income from continuing operations attributable to common shareholders, as adjusted – per share | $ | 0.39 |  |  | $ | 0.31 |  |  | $ | 1.26 |  |  | $ | 1.17 |
Income from discontinued operations, including gain on sale, attributable to common shareholders – per share | 0.41 |  |  | 0.05 |  |  | 1.09 |  |  | 0.52 |
Net income attributable to common shareholders, as adjusted – per share | $ | 0.80 |  |  | $ | 0.36 |  |  | $ | 2.35 |  |  | $ | 1.69 |
Weighted average number of common shares outstanding – basic | 87,449 |  |  | 85,631 |  |  | 87,117 |  |  | 82,923 |
Earnings per share calculation – diluted |  |  |  |  |  |  |
Income from continuing operations attributable to common shareholders, net of amount allocated to participating securities | $ | 34,039 |  |  | $ | 26,526 |  |  | $ | 109,833 |  |  | $ | 97,004 |
Income allocated to common units from continuing operations | — |  |  | — |  |  | 947 |  |  | 985 |
Income from continuing operations attributable to common shareholders, as adjusted | $ | 34,039 |  |  | $ | 26,526 |  |  | $ | 110,780 |  |  | $ | 97,989 |
Income from discontinued operations, including gain on sale, attributable to common shareholders | 36,058 |  |  | 3,889 |  |  | 94,577 |  |  | 42,833 |
Income from discontinued operations allocated to common units | — |  |  | — |  |  | 1,778 |  |  | 852 |
Net income attributable to common shareholders, as adjusted | $ | 70,097 |  |  | $ | 30,415 |  |  | $ | 207,135 |  |  | $ | 141,674 |
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
(in thousands, except per share amounts) | 2013 |  | 2012 |  | 2013 |  | 2012
Earnings per share calculation – diluted (continued) |  |  |  |  |  |  |
Income from continuing operations attributable to common shareholders, as adjusted – per share | $ | 0.39 |  |  | $ | 0.31 |  |  | $ | 1.25 |  |  | $ | 1.16 |
Income from discontinued operations, including gain on sale, attributable to common shareholders – per share | 0.41 |  |  | 0.04 |  |  | 1.09 |  |  | 0.51 |
Net income attributable to common shareholders, as adjusted – per share | $ | 0.80 |  |  | $ | 0.35 |  |  | $ | 2.34 |  |  | $ | 1.67 |
Weighted average number of common shares outstanding – basic | 87,449 |  |  | 85,631 |  |  | 87,117 |  |  | 82,923 |
Incremental shares issuable from assumed conversion of: |  |  |  |  |  |  |
Common share options and share awards granted | 453 |  |  | 662 |  |  | 497 |  |  | 655 |
Common units | — |  |  | — |  |  | 815 |  |  | 1,116 |
Weighted average number of common shares outstanding – diluted | 87,902 |  |  | 86,293 |  |  | 88,429 |  |  | 84,694 |

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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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