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Significant Accounting Policies - Depreciation and Amortization of Right of Use Assets (Narrative) (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Franchisor Disclosure [Line Items] |  |  |  |  |
Depreciation expense (including amortization of the capital lease asset) |  |  | $ 183,900 | $ 221,000 | $ 190,100
Mortgages and other loans payable, net |  |  | 1,944,635 | 1,491,319 |
Repayments of mortgages |  |  | 68,977 | 25,826 | 292,364
Amortization of above and below Market Leases |  |  | 2,600 | 14,200 | $ 5,700
Due from joint ventures |  |  |  |  |
Franchisor Disclosure [Line Items] |  |  |  |  |
Mortgages and other loans payable, net |  |  | 12,234,261 | $ 14,799,277 |
719 Seventh Avenue |  |  |  |  |
Franchisor Disclosure [Line Items] |  |  |  |  |
Write down of value in leasehold interest |  | $ 46,300 |  |  |
719 Seventh Avenue | Andrew Mathias | Related party |  |  |  |  |
Franchisor Disclosure [Line Items] |  |  |  |  |
Proceeds from sale of property | $ 30,500 |  |  |  |
760 Madison Avenue |  |  |  |  |
Franchisor Disclosure [Line Items] |  |  |  |  |
Write down of value in leasehold interest |  |  | 17,600 |  |
Capitalized interest |  |  | 15,100 |  |
690 Madison Avenue |  |  |  |  |
Franchisor Disclosure [Line Items] |  |  |  |  |
Write down of value in leasehold interest |  |  | $ 34,300 |  |
690 Madison Avenue | Due from joint ventures |  |  |  |  |
Franchisor Disclosure [Line Items] |  |  |  |  |
Reduction of ownership percentage |  |  | 90.00% |  |
Mortgages and other loans payable, net |  |  | $ 60,900 |  |
Repayments of mortgages |  |  | $ 32,100 |  |

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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production related to Commercial Real Estate Properties. + References No definition available. + Details
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