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Investments In Joint Ventures (Aggregate Balance Sheet And Statement Of Income Data For Unconsolidated Joint Ventures) (Details) (USD $) | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jan. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Investments In Joint Ventures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Total assets |  | $ 1,394,900,000 | $ 1,068,100,000 | [1] |  | $ 1,394,900,000 |  |  | $ 1,068,100,000 | [1] |  |
Total third-party debt |  | 1,093,900,000 | 844,700,000 | [1] |  | 1,093,900,000 |  |  | 844,700,000 | [1] |  |
Total equity |  | 261,600,000 | 188,700,000 | [1] |  | 261,600,000 |  |  | 188,700,000 | [1] |  |
Total revenues |  |  | 37,500,000 | [2] |  |  | 40,400,000 | [2] | 111,600,000 | [2] | 99,100,000 | [2]
Net income (loss) |  |  | 15,300,000 |  |  |  | (7,400,000) |  | 13,500,000 |  | (13,800,000) |
Equity in income (loss) |  |  | 3,688,000 | [3] |  |  | (556,000) | [3] | 4,686,000 | [3] | (166,000) | [3]
Percentage of voting interests acquired | 80.00% |  | 75.00% |  |  |  |  |  | 75.00% |  |  |
Number of unconsolidated equity method investments acquired | 12 |  |  |  |  |  |  |  |  |  |  |
Revenues from discontinued operations attributable to unconsolidated joint venture |  |  | $ 2,200,000 |  |  |  | $ 5,700,000 |  | $ 7,500,000 |  | $ 16,400,000 |
Number of operating properties sold |  | 2 | 1 |  | 3 | 4 |  |  |  |  |  |
[1] | In January 2012, as a result of our purchase of the remaining 80% ownership interest in previously unconsolidated joint ventures, we consolidated twelve joint ventures previously accounted for in accordance with the equity method. Refer to Note 6, "Property Acquisitions, Discontinued Operations, and Assets Held for Sale," for further discussion of the acquisition.
[2] | Excludes approximately $2.2 million and $7.5 million of revenues for the three and nine months ended September 30, 2012, and $5.7 million and $16.4 million for the three and nine months ended September 30, 2011, respectively, related to discontinued operations within one of our unconsolidated joint ventures resulting from the sale of four operating properties in the fourth quarter of 2011 and one operating property in the fourth quarter of 2012. Discontinued operations also relates to the sale of one operating property in another unconsolidated joint venture during the third quarter of 2012.
[3] | Equity in income (loss) excludes our ownership interest of fee income from various property management services provided by us to our joint ventures.

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