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Investments in Real Estate Entities (Details 4) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Fund II |  |
Summary of the Company's equity in income of unconsolidated entities |  |
Equity in income of unconsolidated entities relating to the Company's recognition of promoted interest | $ 925 |
Avalon Kirkland at Carillon [Member] | US Fund |  |
Summary of the Company's equity in income of unconsolidated entities |  |
Gain on sale of communities |  | $ 8,636

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