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Partners Equity of The Operating Partnership (Tables) | 12 Months Ended
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Dec. 31, 2011
Equity [Abstract] |
Earnings per Common Partnership Unit |
| Years ended December 31,
| 2011 |  | 2010 |  | 2009
| Basic |  | Diluted |  | Basic |  | Diluted |  | Basic |  | Diluted
Numerator |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations | $ | (13,232 | ) |  | $ | (13,232 | ) |  | $ | (31,276 | ) |  | $ | (31,276 | ) |  | $ | 3,588 |  |  | $ | 3,588 |
Net (loss) income from continuing operations attributable to non-controlling interests | — |  |  | — |  |  | — |  |  | — |  |  | (30 | ) |  | (30 | )
Amount allocable to unvested restricted unitholders | (505 | ) |  | (505 | ) |  | (512 | ) |  | (512 | ) |  | (279 | ) |  | (279 | )
Preferred share dividends | (7,992 | ) |  | (7,992 | ) |  | (7,992 | ) |  | (7,992 | ) |  | (7,992 | ) |  | (7,992 | )
Loss from continuing operations available to common unitholders | (21,729 | ) |  | (21,729 | ) |  | (39,780 | ) |  | (39,780 | ) |  | (4,713 | ) |  | (4,713 | )
Discontinued operations attributable to common unitholders | 8,517 |  |  | 8,517 |  |  | 13,670 |  |  | 13,670 |  |  | 4,501 |  |  | 4,501 |
Net loss available to common unitholders | $ | (13,212 | ) |  | $ | (13,212 | ) |  | $ | (26,110 | ) |  | $ | (26,110 | ) |  | $ | (212 | ) |  | $ | (212 | )
Denominator |  |  |  |  |  |  |  |  |  |  |
Weighted-average units outstanding | 145,118,841 |  |  | 145,118,841 |  |  | 137,454,796 |  |  | 137,454,796 |  |  | 114,712,869 |  |  | 114,712,869 |
Contingent securities/Stock based compensation | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,353,246 |
Total weighted-average units outstanding | 145,118,841 |  |  | 145,118,841 |  |  | 137,454,796 |  |  | 137,454,796 |  |  | 114,712,869 |  |  | 116,066,115 |
Earnings (loss) per Common Share: |  |  |  |  |  |  |  |  |  |  |
Loss from continuing operations attributable to common unitholders | $ | (0.15 | ) |  | $ | (0.15 | ) |  | $ | (0.29 | ) |  | $ | (0.29 | ) |  | $ | (0.04 | ) |  | $ | (0.04 | )
Discontinued operations attributable to common unitholders | 0.06 |  |  | 0.06 |  |  | 0.10 |  |  | 0.10 |  |  | 0.04 |  |  | 0.04 |
Net loss attributable to common unitholders | $ | (0.09 | ) |  | $ | (0.09 | ) |  | $ | (0.19 | ) |  | $ | (0.19 | ) |  | $ | — |  |  | $ | — |

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