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Investments In Joint Ventures (Aggregate Balance Sheet And Statement Of Income Data For Unconsolidated Joint Ventures) (Details) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2012 | Dec. 31, 2012
Investments In Joint Ventures [Abstract] |  |  |  |  |  |
Total assets | $ 917,800,000 | [1] | $ 917,800,000 | [1] |  |
Total third-party debt | 724,800,000 |  | 712,700,000 |  |  |
Total equity | 165,500,000 |  | 165,200,000 |  |  |
Total revenues | 32,500,000 | [2] | 33,700,000 | [2],[3] |  |
Net income (loss) | 2,000,000 |  | (1,700,000) |  |  |
Equity in income | 934,000 | [4] | 366,000 | [4] |  |
Properties held for sale by unconsolidated joint venture | 102,300,000 |  |  |  |  |
Revenues prior to sale of operating properties in unconsolidated joint venture |  |  | 4,100,000 |  |  |
Revenues from discontinued operations attributable to unconsolidated joint venture |  |  | $ 6,800,000 |  |  |
Number of operating properties sold | 1 |  |  |  | 7 | 11
[1] | Includes approximately $102.3 million of assets at March 31, 2013 relating to one joint venture which are under contract to be sold in the second quarter of 2013.
[2] | Excludes approximately $6.8 million for the three months ended March 31, 2012 relating to the discontinued operations from the sale of seven operating properties within two of our unconsolidated joint ventures during the third and fourth quarters of 2012.
[3] | Includes approximately $4.1 million of revenues related to the acquisition by us of 12 joint ventures in January 2012 and one joint venture in December 2012.
[4] | Equity in income excludes our ownership interest of fee income from various property management services provided by us to our joint ventures.

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