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Share Data | 12 Months Ended
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Dec. 31, 2011
Share Data [Abstract] |
Share Data | 3. Share Data Basic earnings per share are computed using net income (loss) attributable to common shareholders and the weighted average number of common shares outstanding. Diluted earnings per share reflect common shares issuable from the assumed conversion of common share options and share awards granted and units convertible into common shares. Only those items having a dilutive impact on our basic earnings per share are included in diluted earnings per share. Our unvested share-based awards are considered participating securities and are reflected in the calculation of basic and diluted earnings per share using the two-class method. The number of common share equivalent securities excluded from the diluted earnings per share calculation was approximately 3.8 million, 4.8 million, and 4.9 million for the years ended December 31, 2011, 2010, and 2009, respectively. These securities, which include common share options and share awards granted and units convertible into common shares, were excluded from the diluted earnings per share calculation as they are anti-dilutive. The following table presents information necessary to calculate basic and diluted earnings per share for the periods indicated:
|  |  | 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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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=6945512&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1278-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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