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Investments in Real Estate Entities - Narrative of Investment in Real Estate Entities (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2018 USD ($) entity | Dec. 31, 2017 USD ($)
Equity method investment |  |
Equity method investment, difference between carrying amount and underlying equity | $ 34,702 | $ 35,402
Unconsolidated real estate entities |  |
Equity method investment |  |
Number of unconsolidated real estate entities | entity | 5 |
Avalon Bay Value Added Fund II LP |  |
Equity method investment |  |
Equity method investment, ownership percentage | 31.30% |
Percentage of right of distribution | 40.00% |
Percentage of right of remaining distribution | 60.00% |
Proceeds from equity method investment, dividends or distributions | $ 925 |
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 | $ 19,813 | $ 44,831
Avalon Brooklyn Bay Condominiums [Member] |  |
Equity method investment |  |
Variable interest entity, ownership interest by partner | 100.00% |
Avalon Brooklyn Bay Rental Apartments [Member] |  |
Equity method investment |  |
Variable interest entity, qualitative or quantitative information, ownership percentage | 100.00% |
Minimum | Unconsolidated real estate entities |  |
Equity method investment |  |
Equity method investment, ownership percentage | 20.00% |
Maximum [Member] | Unconsolidated real estate entities |  |
Equity method investment |  |
Equity method investment, ownership percentage | 31.30% |

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