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Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2012 | Dec. 31, 2012 item
Discontinued Operations |  |  |
Number of properties sold |  |  | 5
Discontinued Operations |  |  |
Rental income | $ 507 | $ 1,600 |
Depreciation and amortization | 38 | 249 |
Real estate expenses |  | 102 |
Interest expense | 100 | 332 |
Total expenses | 138 | 683 |
Income from operations | 369 | 917 |
Net gain on sales | 15,050 | 17,254 |
Income from discontinued operations | $ 15,419 | $ 18,171 |

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