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Discontinued Operations (Tables) | 12 Months Ended
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Dec. 31, 2011
Discontinued Operations and Disposal Groups [Abstract] |
Revenue and expense information for the property classified as discontinued operations |
| Years ended December 31,
| 2011 |  | 2010 |  | 2009
Revenue: |  |  |  |  |
Rents | $ | 3,779 |  |  | $ | 9,363 |  |  | $ | 19,095 |
Tenant reimbursements | 1,198 |  |  | 3,678 |  |  | 8,453 |
Termination fees | 33 |  |  | 190 |  |  | — |
Other | (50 | ) |  | 70 |  |  | 238 |
Total revenue | 4,960 |  |  | 13,301 |  |  | 27,786 |
Expenses: |  |  |  |  |
Property operating expenses | 1,717 |  |  | 4,641 |  |  | 9,884 |
Real estate taxes | 559 |  |  | 1,816 |  |  | 3,769 |
Depreciation and amortization | 1,431 |  |  | 4,185 |  |  | 7,173 |
Total operating expenses | 3,707 |  |  | 10,642 |  |  | 20,826 |
Income from discontinued operations before gain on sale of interests in real estate | 1,253 |  |  | 2,659 |  |  | 6,960 |
Net gain on disposition of discontinued operations | 7,264 |  |  | 11,011 |  |  | 1,241 |
Provision for impairment | — |  |  | — |  |  | (3,700 | )
Income from discontinued operations | $ | 8,517 |  |  | $ | 13,670 |  |  | $ | 4,501 |

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