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Investments in Equity Affiliates - Summary (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Investment in Equity Affiliates |  |
Investment in Equity Affiliates | $ 89,676 | $ 74,274
UPB of Loans to Equity Affiliates | 1,687 |
Arbor Residential Investor LLC |  |
Investment in Equity Affiliates |  |
Investment in Equity Affiliates | 65,756 | 59,150
AMAC Holdings III LLC |  |
Investment in Equity Affiliates |  |
Investment in Equity Affiliates | 13,772 | 10,308
Fifth Wall Ventures III |  |
Investment in Equity Affiliates |  |
Investment in Equity Affiliates | 5,409 |
North Vermont Avenue |  |
Investment in Equity Affiliates |  |
Investment in Equity Affiliates | 2,419 | 2,496
Lightstone Value Plus REIT L.P. |  |
Investment in Equity Affiliates |  |
Investment in Equity Affiliates | 1,895 | 1,895
JT Prime |  |
Investment in Equity Affiliates |  |
Investment in Equity Affiliates | 425 | $ 425
West Shore Cafe |  |
Investment in Equity Affiliates |  |
UPB of Loans to Equity Affiliates | $ 1,687 |

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