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Financial Instruments and Fair Value Measurements - Schedule of Items Measured at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Real Estate [Line Items] |  |  |  |
Impairment charges |  | $ 1,678 | $ 3,686 | $ 33,311
Fair Value, Measurements, Nonrecurring |  |  |  |
Real Estate [Line Items] |  |  |  |
Impairment charges | [1],[2] | 1,678 |  |
Fair Value, Measurements, Nonrecurring | Acadia Realty Trust |  |  |  |
Real Estate [Line Items] |  |  |  |
Impairment charges | [1],[2] | $ 750 |  |
Fair Value, Measurements, Nonrecurring | 1964 Union Street San Francisco, CA | Fund IV | Level 3 Inputs Projections |  |  |  |
Real Estate [Line Items] |  |  |  |
Triggering Event |  | Reduced holding period |  |
Impairment charges | [2] | $ 1,170 |  |
Fair Value, Measurements, Nonrecurring | 1964 Union Street San Francisco, CA | Acadia Realty Trust | Fund IV | Level 3 Inputs Projections |  |  |  |
Real Estate [Line Items] |  |  |  |
Impairment charges | [2] | $ 242 |  |
Fair Value, Measurements, Nonrecurring | Mark Plaza Edwardsville, PA | Core | Level 3 Inputs Projections |  |  |  |
Real Estate [Line Items] |  |  |  |
Triggering Event |  | Reduced projected operating income |  |
Impairment charges | [2] | $ 508 |  |
Fair Value, Measurements, Nonrecurring | Mark Plaza Edwardsville, PA | Acadia Realty Trust | Core | Level 3 Inputs Projections |  |  |  |
Real Estate [Line Items] |  |  |  |
Impairment charges | [2] | $ 508 |  |
Fair Value, Measurements, Nonrecurring | 146 Geary Street, San Francisco, CA | Fund IV | Level 3 Inputs Projections |  |  |  |
Real Estate [Line Items] |  |  |  |
Triggering Event |  |  | Reduced holding period |
Impairment charges | [2] |  | $ 3,686 |
Fair Value, Measurements, Nonrecurring | 146 Geary Street, San Francisco, CA | Acadia Realty Trust | Fund IV | Level 3 Inputs Projections |  |  |  |
Real Estate [Line Items] |  |  |  |
Impairment charges | [2] |  | $ 852 |
[1] | Does not include the impairment charge of $0.4 million related to the Company’s investment in Fifth Wall (Note 4) which is recorded in Realized and unrealized holding (losses) gains on investments and other, in the Company’s consolidated Statement of Operations.
[2] | The Company est imated the fair valu e of 1964 Union Street, Mark Plaza and 146 Geary Street based on a discounted cash flow analysis using a discount rate of 7.75% and a range of capitalization rates from 4.75% to 5.75%. A s significant inputs to the models are unobservable, the Company determined that the value determined for these properties falls within Level 3 of the fair value reporting hierarchy.

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