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v3.20.4

Fair Value (Details) | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) derivative | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) derivative | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | May 31, 2020 USD ($) | Feb. 29, 2020 USD ($)
Derivative instruments and Hedging Activities |  |  |  |  |  |  |  |
Derivative, Notional Amounts Settled During Period |  | $ 250,000,000 | $ 350,000,000 | $ 600,000,000 |  |  |  |
Receipts (payments) for termination of forward interest rate swaps |  | $ (4,821,000) | $ (20,314,000) | (25,135,000) | $ (12,309,000) | $ 12,598,000 |  |
(Loss) gain on cash flow hedges |  |  |  | (17,731,000) | (11,930,000) | 5,132,000 |  |
Unrealized Gain (Loss) on Derivatives | $ 2,894,000 |  |  | 2,894,000 | 0 | $ 0 |  |
Interest Rate Swap | Cash Flow Hedges Interest Rate Caps |  |  |  |  |  |  |  |
Derivative instruments and Hedging Activities |  |  |  |  |  |  |  |
Derivative, Notional Amount | $ 150,000,000 |  |  | $ 150,000,000 |  |  |  |
Weighted average capped interest rate (as a percent) | 0.70% |  |  | 0.70% |  |  |  |
Derivative, notional amounts entered into during period |  |  |  | $ 150,000,000 |  |  |  |
Interest Rate Caps |  |  |  |  |  |  |  |
Derivative instruments and Hedging Activities |  |  |  |  |  |  |  |
Number of derivative instruments held | derivative | 10 |  |  | 10 |  |  |  |
Interest Rate Caps | Interest Rate Caps |  |  |  |  |  |  |  |
Derivative instruments and Hedging Activities |  |  |  |  |  |  |  |
Derivative, Notional Amount | $ 679,167,000 |  |  | $ 679,167,000 |  |  |  |
Weighted average interest rate (as a percent) | 1.70% |  |  | 1.70% |  |  |  |
Weighted average capped interest rate (as a percent) | 6.40% |  |  | 6.40% |  |  |  |
Unsecured Notes 2.30 Percent [Member] |  |  |  |  |  |  |  |
Derivative instruments and Hedging Activities |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  | $ 700,000,000
Unsecured Notes 2.45 Percent [Member] |  |  |  |  |  |  |  |
Derivative instruments and Hedging Activities |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  | $ 600,000,000 |
Reclassification out of Accumulated Other Comprehensive Income |  |  |  |  |  |  |  |
Derivative instruments and Hedging Activities |  |  |  |  |  |  |  |
Gain (loss) reclassification from accumulated OCI to income, estimated net amount to be transferred |  |  |  | $ 9,467,000 |  |  |  |
Avalon Brooklyn Bay |  |  |  |  |  |  |  |
Derivative instruments and Hedging Activities |  |  |  |  |  |  |  |
Due from Related Parties | $ 3,645,000 |  |  | $ 3,645,000 | $ 10,650,000 |  |  |

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