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Investments in Real Estate Entities - Narrative of Investment in Real Estate Entities (Details) $ in Thousands | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Feb. 28, 2019 USD ($) home | Mar. 31, 2019 USD ($) entity | Mar. 31, 2018 USD ($) | Dec. 31, 2018 USD ($)
Equity method investment |  |  |  |
Equity method investment, difference between carrying amount and underlying equity |  | $ 30,866 |  | $ 31,188
Payments to Acquire Other Real Estate |  | $ 91,548 | $ 0 |
Unconsolidated real estate entities |  |  |  |
Equity method investment |  |  |  |
Number of unconsolidated real estate entities | entity |  | 6 |  |
Avalon Brooklyn Bay |  |  |  |
Equity method investment |  |  |  |
Variable interest entity, qualitative or quantitative information, ownership percentage |  | 70.00% |  |
Variable interest entity, ownership interest by partner |  | 30.00% |  |
Due from related parties |  | $ 11,925 |  | $ 12,819
Avalon Brooklyn Bay Rental Apartments [Member] |  |  |  |
Equity method investment |  |  |  |
Variable interest entity, qualitative or quantitative information, ownership percentage |  | 100.00% |  |
Avalon Brooklyn Bay Condominiums [Member] |  |  |  |
Equity method investment |  |  |  |
Variable interest entity, ownership interest by partner |  | 100.00% |  |
Minimum | Unconsolidated real estate entities |  |  |  |
Equity method investment |  |  |  |
Equity Method Investment, Ownership Percentage |  | 20.00% |  |
Maximum | Unconsolidated real estate entities |  |  |  |
Equity method investment |  |  |  |
Equity Method Investment, Ownership Percentage |  | 55.00% |  |
Ridge at Wheatlands [Member] |  |  |  |
Equity method investment |  |  |  |
Number of Apartment Homes Acquired | home | 338 |  |  |
Payments to Acquire Other Real Estate | $ 91,250 |  |  |

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