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Per Share Data (Tables) | 3 Months Ended
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Mar. 31, 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
|  | March 31,
(in thousands, except per share amounts) |  | 2013 |  | 2012
Earnings per share calculation – basic |  |  |  |
Income from continuing operations attributable to common shareholders |  | $ | 30,985 |  |  | $ | 53,958 |
Amount allocated to participating securities |  | (638 | ) |  | (890 | )
Income from continuing operations attributable to common shareholders, net of amount allocated to participating securities |  | 30,347 |  |  | 53,068 |
Income from discontinued operations, including gain on sale, attributable to common shareholders |  | 32,491 |  |  | 34,800 |
Net income attributable to common shareholders, as adjusted |  | $ | 62,838 |  |  | $ | 87,868 |
Income from continuing operations attributable to common shareholders, as adjusted – per share |  | $ | 0.35 |  |  | $ | 0.66 |
Income from discontinued operations, including gain on sale, attributable to common shareholders – per share |  | 0.37 |  |  | 0.44 |
Net income attributable to common shareholders, as adjusted – per share |  | $ | 0.72 |  |  | $ | 1.10 |
Weighted average number of common shares outstanding – basic |  | 86,703 |  |  | 79,885 |
Earnings per share calculation – diluted |  |  |  |
Income from continuing operations attributable to common shareholders, net of amount allocated to participating securities |  | $ | 30,347 |  |  | $ | 53,068 |
Income allocated to common units from continuing operations |  | — |  |  | 639 |
Income from continuing operations attributable to common shareholders, as adjusted |  | 30,347 |  |  | 53,707 |
Income from discontinued operations, including gain on sale, attributable to common shareholders |  | 32,491 |  |  | 34,800 |
Net income attributable to common shareholders, as adjusted |  | $ | 62,838 |  |  | $ | 88,507 |
Income from continuing operations attributable to common shareholders, as adjusted – per share |  | $ | 0.35 |  |  | $ | 0.65 |
Income from discontinued operations, including gain on sale, attributable to common shareholders – per share |  | 0.37 |  |  | 0.42 |
Net income attributable to common shareholders, as adjusted – per share |  | $ | 0.72 |  |  | $ | 1.07 |
Weighted average number of common shares outstanding – basic |  | 86,703 |  |  | 79,885 |
Incremental shares issuable from assumed conversion of: |  |  |  |
Common share options and share awards granted |  | 573 |  |  | 679 |
Common units |  | — |  |  | 2,291 |
Weighted average number of common shares outstanding – diluted |  | 87,276 |  |  | 82,855 |

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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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