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Fair Value Measurements - Narrative (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2023 USD ($) property | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) property loan | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Oct. 01, 2023 property
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Real estate impairment provision | $ |  |  | $ 409,512 | $ 127,577 | $ 4,242 |
Number of impaired properties |  |  | 17 |  |  |
Number of mortgage loans (in loan) | loan |  |  | 7 |  |  |
Assets evaluated using discounted cash flow analyses | 13 |  | 13 |  |  |
Assets evaluated using estimated selling price per share | 4 |  | 4 |  |  |
Impairment provision - goodwill | $ | $ 16,000 |  | $ 16,031 | $ 135,270 | $ 0 |
Minimum |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Current borrowing rate for debt instruments (as a percent) | 3.75% |  | 3.75% |  |  |
Maximum |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Current borrowing rate for debt instruments (as a percent) | 8.20% |  | 8.20% |  |  |
Other |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Assets evaluated using discounted cash flow analyses |  |  |  |  |  | 15
Assets evaluated using estimated selling price per share | 3 |  | 3 |  |  |
Impairment provision - goodwill | $ | $ 16,000 |  |  |  |  |
Office Joint Venture |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Other than temporary impairment | $ |  | $ 129,300 | $ 129,334 |  |  |
Office |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Real estate impairment provision | $ |  |  | $ 208,300 |  |  |
Number of impaired properties |  |  | 9 |  |  |
Other |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Real estate impairment provision | $ |  |  | $ 201,200 |  |  |
Number of impaired properties |  |  | 8 |  |  |

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