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Investments - Narrative (Details) ft² in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($) investor home ft² commitment entity | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) community | Dec. 31, 2018 home community ft²
Schedule of Equity Method Investments [Line Items] |  |  |  |
Other commitments, number of SIP commitments | commitment | 7 |  |  |
Other commitment | $ 191,585 |  |  |
Weighted average rate of return, commitments | 11.50% |  |  |
Outstanding funding, commitments | $ 186,549 |  |  |
Preferred interest obligation redemption and dividends | 1,320 | $ 940 | $ 860 |
Total principal outstanding | $ 8,134,429 | 8,044,042 |  |
Number of units in real estate property | home | 93,518 |  |  |
Long-term construction loan, maximum borrowing capacity, guarantee, percentage | 30.00% |  |  |
Long-term construction loan guarantee, payment reimbursement by partner, percentage | 75.00% |  |  |
Structured Investment Program |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Interest income, other | $ 16,022 | 6,189 | $ 0 |
NYC JV |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Retail square feet sold | ft² |  |  |  | 58
US Fund |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Number of apartment communities sold | community |  |  | 3 |
NYC JV |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Number of apartment communities sold | community |  |  |  | 5
Number of apartment homes sold | home |  |  |  | 1,301
Property and construction management roles |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Unconsolidated real estate entities | entity | 5 |  |  |
Property and construction management roles | Minimum |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage of equity method investment | 20.00% |  |  |
Property and construction management roles | Maximum |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage of equity method investment | 50.00% |  |  |
US Fund |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage of equity method investment | 28.60% |  |  |
Income for promoted interest |  | 1,519 | $ 4,690 |
US Fund | Avalon Grosvenor Tower, Avalon Studio 4121 and Avalon Station 250 |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Realized gain (loss) on disposal of equity method investment |  |  | 38,144 |
ACJV |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage of equity method investment | 20.00% |  |  |
Legacy JV |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage of equity method investment | 40.00% |  |  |
Preferred interest obligation liquidation value | $ 32,817 |  |  |
NYC JV |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage of equity method investment | 20.00% |  |  |
Total principal outstanding | $ 394,734 |  |  |
Equity method investments | $ 53,678 |  |  |
MVPI LLC |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage of equity method investment | 25.00% |  |  |
Total principal outstanding | $ 103,000 |  |  |
Number of units in real estate property | home | 313 |  |  |
Brandywine |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage of equity method investment | 28.70% |  |  |
Total principal outstanding | $ 18,368 |  |  |
Equity method investments | $ 13,924 |  |  |
Number of units in real estate property | home | 305 |  |  |
Number of members who hold various interests in joint venture | investor | 5 |  |  |
Avalon Alderwood Mall |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage of equity method investment | 50.00% |  |  |
Equity method investments | $ 50,926 |  |  |
Number of units in real estate property | home | 328 |  |  |
AVA Arts District |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage of equity method investment | 25.00% |  |  |
Equity method investments | $ 29,932 |  |  |
Number of units in real estate property | home | 475 |  |  |
Commercial square feet | ft² | 57 |  |  |
Proceeds from construction loans payable | $ 155,968 |  |  |
Long-term construction loan | 167,147 |  |  |
Property Technology Investments |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Other commitment | 62,494 |  |  |
Equity method investments and equity securities | 58,122 |  |  |
Gain (loss) on equity securities | $ 33,137 | $ 4,161 | $ 8,315 |

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