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Organization, Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Operating Partnership's Equity Interest (Parenthetical) (Details) - USD ($) $ in Millions | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Aug. 31, 2020 | Sep. 30, 2021 | Apr. 08, 2021
Mervyns II |  |  |
Variable Interest Entity [Line Items] |  |  |
Recallable distributions | $ 15.7 |  |
Distribution recalled during period |  | $ 7.0 |
Mervyns II | Acadia |  |  |
Variable Interest Entity [Line Items] |  |  |
Recallable distributions | $ 4.5 |  |
Distribution recalled during period |  | $ 2.0 |
Fund V |  |  |
Variable Interest Entity [Line Items] |  |  |
Investment, maturity date |  |  | Aug. 25, 2022

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