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Segment Reporting - Summary of Segment Information (Parenthetical) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Segment Reporting Information [Line Items] |  |  |  |  |
Real estate at cost | $ 4,043,253 | $ 4,162,224 | $ 4,043,253 | $ 4,162,224 |
Total assets | 4,089,612 | 4,328,748 | 4,089,612 | 4,328,748 | $ 4,186,882
Net loss (income) attributable to noncontrolling interests | 2,687 | $ (45,496) | 5,989 | 6,129 |
Opportunity Funds | Fund II's City Point Property |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Real estate at cost | 650,600 |  | 650,600 |  |
Total assets | $ 604,800 |  | 604,800 |  |
Net loss (income) attributable to noncontrolling interests |  |  | $ 189,000 | $ 176,000 |

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