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Discontinued Operations and Properties Held for Sale (Details) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 property | Sep. 30, 2011 property | Dec. 31, 2011
Discontinued Operations and Properties Held for Sale |  |  |  |  |
Total sales price, net of closing costs |  |  | $ 24,823,000 | $ 11,544,000 |
Discontinued operations and properties held for sale |  |  |  |  |
Related assets of properties held for sale | 87,000 |  | 87,000 |  | 502,000
Net book value of properties held for sale | 3,173,000 |  | 3,173,000 |  | 10,986,000
Number of properties whose operations are included in discontinued operations |  |  | 4 |  |
Number of properties sold whose net gain and operations are included in discontinued operations |  |  | 3 | 1 |
Discontinued Operations and Properties Held for Sale |  |  |  |  |
Rental income | 381,000 | 395,000 | 1,222,000 | 1,527,000 |
Depreciation and amortization | 17,000 | 89,000 | 187,000 | 331,000 |
Real estate expenses |  | 67,000 | 101,000 | 198,000 |
Interest expense | 100,000 | 117,000 | 332,000 | 352,000 |
Total expenses | 117,000 | 273,000 | 620,000 | 881,000 |
Income from operations | 264,000 | 122,000 | 602,000 | 646,000 |
Net gain on sales | 15,050,000 |  | 17,254,000 | 932,000 |
Income from discontinued operations | 15,314,000 | 122,000 | 17,856,000 | 1,578,000 |
Property in Texas |  |  |  |  |
Discontinued operations and properties held for sale |  |  |  |  |
Agreed sale price of property held for sale | 5,000,000 |  | 5,000,000 |  |
Estimated gain on sale of property held for sale |  |  | 1,650,000 |  |
Related assets of properties held for sale | 87,000 |  | 87,000 |  |
Net book value of properties held for sale | $ 3,173,000 |  | $ 3,173,000 |  |
Property in New York |  |  |  |  |
Discontinued operations and properties held for sale |  |  |  |  |
Number of properties located in New York sold |  |  | 2 |  |

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