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Partners Equity of the Operating Partnership (Tables) | 3 Months Ended
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Mar. 31, 2014
Equity [Abstract] |
Earnings Per Common Partnership Unit [Table Text Block] | Earnings per Common Partnership Unit The following tables detail the number of units and net income used to calculate basic and diluted earnings per common partnership unit (in thousands, except unit and per unit amounts; results may not add due to rounding):
| Three month periods ended March 31,
| 2014 |  | 2013
| Basic |  | Diluted |  | Basic |  | Diluted
Numerator |  |  |  |  |  |  |
Loss from continuing operations | $ | (2,237 | ) |  | $ | (2,237 | ) |  | $ | (2,245 | ) |  | $ | (2,245 | )
Nonforfeitable dividends allocated to unvested restricted unitholders | (103 | ) |  | (103 | ) |  | (108 | ) |  | (108 | )
Preferred unit dividends | (1,725 | ) |  | (1,725 | ) |  | (1,725 | ) |  | (1,725 | )
Net income attributable to non-controlling interests | (12 | ) |  | (12 | ) |  | — |  |  | — |
Loss from continuing operations available to common unitholders | (4,077 | ) |  | (4,077 | ) |  | (4,078 | ) |  | (4,078 | )
Discontinued operations attributable to common unitholders | (8 | ) |  | (8 | ) |  | 6,164 |  |  | 6,164 |
Net income (loss) attributable to common unitholders | $ | (4,085 | ) |  | $ | (4,085 | ) |  | $ | 2,086 |  |  | $ | 2,086 |
Denominator |  |  |  |  |  |  |
Weighted-average units outstanding | 158,557,758 |  |  | 158,557,758 |  |  | 145,451,396 |  |  | 145,451,396 |
Earnings per Common Partnership Unit: |  |  |  |  |  |  |
Loss from continuing operations attributable to common unitholders | $ | (0.03 | ) |  | $ | (0.03 | ) |  | $ | (0.03 | ) |  | $ | (0.03 | )
Discontinued operations attributable to common unitholders | — |  |  | — |  |  | 0.04 |  |  | 0.04 |
Net income (loss) attributable to common unitholders | $ | (0.03 | ) |  | $ | (0.03 | ) |  | $ | 0.01 |  |  | $ | 0.01 |

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