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Investments in Real Estate Entities (Details 3) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Combined summary of the operating results of the accounted for using the equity method |  |  |
Rental and other income | $ 92,504 | $ 101,615 | $ 131,901
Operating and other expenses | (35,005) | (38,566) | (50,945)
Gain on sale of communities | 54,202 | 136,333 | 196,749
Interest expense, net | (22,488) | (27,104) | (45,886)
Depreciation expense | (26,706) | (25,914) | (34,471)
Net income | 62,507 | 146,364 | 197,348
Schedule of Equity Method Investments [Line Items] |  |  |
Loss on extinguishment of debt, net | 17,492 | 25,472 | 7,075
Funds [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Loss on extinguishment of debt, net | $ 312 | $ 1,591 | $ 12,659

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