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Partners Equity of The Operating Partnership (Tables) | 3 Months Ended
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Mar. 31, 2012
Equity [Abstract] |
Earnings per Common Partnership Unit |
| Three-month periods ended March 31,
| 2012 |  | 2011
| Basic |  | Diluted |  | Basic |  | Diluted
Numerator |  |  |  |  |  |  |
Loss from continuing operations | $ | (5,889 | ) |  | $ | (5,889 | ) |  | $ | (1,567 | ) |  | $ | (1,567 | )
Amount allocable to unvested restricted unitholders | (96 | ) |  | (96 | ) |  | (142 | ) |  | (142 | )
Preferred unit dividends | (1,998 | ) |  | (1,998 | ) |  | (1,998 | ) |  | (1,998 | )
Loss from continuing operations available to common unitholders | (7,983 | ) |  | (7,983 | ) |  | (3,707 | ) |  | (3,707 | )
Discontinued operations attributable to common unitholders | 15,225 |  |  | 15,225 |  |  | 1,077 |  |  | 1,077 |
Net income (loss) attributable to common unitholders | $ | 7,242 |  |  | $ | 7,242 |  |  | $ | (2,630 | ) |  | $ | (2,630 | )
Denominator |  |  |  |  |  |  |
Weighted-average units outstanding | 145,485,422 |  |  | 145,485,422 |  |  | 144,480,173 |  |  | 144,480,173 |
Earnings per Common Partnership Unit: |  |  |  |  |  |  |
Loss from continuing operations attributable to common unitholders | $ | (0.05 | ) |  | $ | (0.05 | ) |  | $ | (0.03 | ) |  | $ | (0.03 | )
Discontinued operations attributable to common unitholders | 0.10 |  |  | 0.10 |  |  | 0.01 |  |  | 0.01 |
Net income (loss) attributable to common unitholders | $ | 0.05 |  |  | $ | 0.05 |  |  | $ | (0.02 | ) |  | $ | (0.02 | )

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