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Investments in Real Estate Entities (Details 2) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013
Assets: |  |  |
Real estate, net | $ 1,883,464,000 |  | $ 1,890,496,000
Other assets | 355,135,000 |  | 402,644,000
Total assets | 2,238,599,000 |  | 2,293,140,000
Liabilities and partners' capital: |  |  |
Mortgage notes payable and credit facility | 1,249,276,000 |  | 1,251,067,000
Other liabilities | 39,532,000 |  | 29,677,000
Partners' capital | 949,791,000 |  | 1,012,396,000
Total liabilities and partners' capital | 2,238,599,000 |  | 2,293,140,000
Combined summary of the operating results of the accounted for using the equity method |  |  |
Rental and other income | 51,132,000 | 43,827,000 |
Operating and other expenses | (21,171,000) | (17,705,000) |
Gain on sale of communities |  | 54,051,000 |
Interest expense, net | (13,890,000) | (15,269,000) |
Depreciation expense | (14,417,000) | (13,151,000) |
Net income | 1,654,000 | 51,753,000 |
Impairment of investment in unconsolidated entities | 0 | 0 |
Expensed Acquisition, Development and Other Pursuit Costs and Impairment of Long-Lived Assets |  |  |
Expensed costs related to acquisition, development and other pursuit costs and impairment of long-lived assets | 702,000 | 245,000 |
Fund I |  |  |
Combined summary of the operating results of the accounted for using the equity method |  |  |
Maximum amount that will be paid for capital contributions made by partners | 7,500,000 |  |
Fund II |  |  |
Combined summary of the operating results of the accounted for using the equity method |  |  |
Maximum amount that will be paid for capital contributions made by partners | 8,910,000 |  |
Fund I and II |  |  |
Combined summary of the operating results of the accounted for using the equity method |  |  |
Costs in excess of equity in underlying net assets of the respective investments | $ 5,404,000 |  | $ 5,439,000
Maximum amount that will be paid for capital contributions made by partners (as a percent) | 10.00% |  |

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