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Share Data (Tables) | 12 Months Ended
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Dec. 31, 2011
Share Data [Abstract] |
Calculation Of Basic And Diluted Earnings Per Share |
|  |  | September 30, |  |  |  | September 30, |  |  |  | September 30, |
|  | Year Ended December 31, |
(in thousands, except per share amounts) |  | 2011 |  |  | 2010 |  |  | 2009 |
Earnings per share calculation – basic |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations attributable to common shareholders |  | $ | 22,546 |  |  | $ | 8,242 |  |  | $ | (75,201 | )
Amount allocated to participating securities |  |  | (551 | ) |  |  | (265 | ) |  |  | 637 |
Income (loss) from continuing operations attributable to common shareholders, net of amount allocated to participating securities |  |  | 21,995 |  |  |  | 7,977 |  |  |  | (74,564 | )
Income from discontinued operations, including gain on sale, attributable to common shareholders |  |  | 26,833 |  |  |  | 14,974 |  |  |  | 24,401 |
Net income (loss) attributable to common shareholders, as adjusted |  | $ | 48,828 |  |  | $ | 22,951 |  |  | $ | (50,163 | )
Income (loss) from continuing operations attributable to common shareholders,as adjusted – per share |  | $ | 0.30 |  |  | $ | 0.11 |  |  | $ | (1.19 | )
Income from discontinued operations, including gain on sale, attributable to common shareholders – per share |  |  | 0.37 |  |  |  | 0.22 |  |  |  | 0.39 |
Net income (loss) attributable to common shareholders, as adjusted – per share |  | $ | 0.67 |  |  | $ | 0.33 |  |  | $ | (0.80 | )
Weighted average number of common shares outstanding – basic |  |  | 72,756 |  |  |  | 68,608 |  |  |  | 62,359 |
Earnings per share calculation – diluted |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations attributable to common shareholders, net of amount allocated to participating securities |  | $ | 21,995 |  |  | $ | 7,977 |  |  | $ | (74,564 | )
Income allocated to common units |  |  | 45 |  |  |  | — |  |  |  | — |
Income (loss) from continuing operations attributable to common shareholders, as adjusted |  |  | 22,040 |  |  |  | 7,977 |  |  |  | (74,564 | )
Income from discontinued operations, including gain on sale, attributable to common shareholders |  |  | 26,833 |  |  |  | 14,974 |  |  |  | 24,401 |
Net income (loss) attributable to common shareholders, as adjusted |  | $ | 48,873 |  |  | $ | 22,951 |  |  | $ | (50,163 | )
Income (loss) from continuing operations attributable to common shareholders, as adjusted – per share |  | $ | 0.30 |  |  | $ | 0.11 |  |  | $ | (1.19 | )
Income from discontinued operations, including gain on sale, attributable to common shareholders – per share |  |  | 0.36 |  |  |  | 0.22 |  |  |  | 0.39 |
Net income (loss) attributable to common shareholders, as adjusted – per share |  | $ | 0.66 |  |  | $ | 0.33 |  |  | $ | (0.80 | )
Weighted average number of common shares outstanding – basic |  |  | 72,756 |  |  |  | 68,608 |  |  |  | 62,359 |
Incremental shares issuable from assumed conversion of: |  |  |  |  |  |  |  |  |  |  |  |
Common share options and share awards granted |  |  | 706 |  |  |  | 349 |  |  |  | — |
Common units |  |  | 239 |  |  |  | — |  |  |  | — |
Weighted average number of common shares outstanding – diluted |  |  | 73,701 |  |  |  | 68,957 |  |  |  | 62,359 |

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