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Related Party Transactions and Investments in Non-Consolidated Entities (Details 3) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 entity | Mar. 31, 2013 entity | Dec. 31, 2013 entity
Related Party Transactions and Investments in Non-Consolidated Entities |  |  |
Sponsored REITs (in entities) | 14 | 15 | 14
Balance Sheet Data (unaudited): |  |  |
Real estate, net | $ 639,165,000 |  | $ 642,105,000
Other assets | 184,961,000 |  | 187,494,000
Total liabilities | (319,349,000) |  | (321,099,000)
Total stockholders' equity | 504,777,000 |  | 508,500,000
Operating Data (unaudited): |  |  |
Rental revenues | 23,305,000 | 23,372,000 |
Other revenues | 14,000 | 18,000 |
Operating and maintenance expenses | (11,746,000) | (11,588,000) |
Depreciation and amortization | (7,677,000) | (7,842,000) |
Interest expense | (3,431,000) | (3,307,000) |
Net income | 465,000 | 653,000 |
Asset management fees, low end of range (as a percent) | 1.00% |  |
Asset management fees, high end of range (as a percent) | 5.00% |  |
Notice period for cancellation of applicable contracts | 30 days |  |
Asset management fee income from non-consolidated entities | $ 234,000 | $ 270,000 |

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