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