Corporate Indebtedness - Schedule of Junior Subordinated Deferrable Interest Debentures and Principal Maturities (Details)	1 Months Ended	6 Months Ended
Jun. 30, 2005 USD ($)	Jun. 30, 2025 USD ($) quarter
Principal Repayments and Joint Venture Debt
Remaining 2025		$ 470,000,000
2026		290,148,000
2027		2,336,153,000
2028		284,775,000
2029		0
Thereafter		372,326,000
Total principal repayments		$ 3,753,402,000
Trust Preferred Securities
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 100,000,000.0
Interest rate added to base rate (as a percent)		0.26%
Interest payment deferment, number of consecutive quarters \| quarter		8
Due from joint venture
Principal Repayments and Joint Venture Debt
Remaining 2025		$ 1,120,691,000
2026		1,009,242,000
2027		1,730,905,000
2028		382,294,000
2029		0
Thereafter		1,800,300,000
Total principal repayments		6,043,432,000
Due from joint venture \| Mortgages and other loans payable
Scheduled Amortization
Remaining 2025		0
2026		0
2027		0
2028		0
2029		0
Thereafter		0
Total amortization of debt		0
Principal Repayments and Joint Venture Debt
Remaining 2025		370,000,000
2026		190,148,000
2027		926,153,000
2028		284,775,000
2029		0
Thereafter		272,326,000
Total principal repayments		2,043,402,000
Due from joint venture \| Revolving Credit Facility
Principal Repayments and Joint Venture Debt
Remaining 2025		0
2026		0
2027		360,000,000
2028		0
2029		0
Thereafter		0
Total principal repayments		360,000,000
Due from joint venture \| Unsecured Term Loans
Principal Repayments and Joint Venture Debt
Remaining 2025		0
2026		100,000,000
2027		1,050,000,000
2028		0
2029		0
Thereafter		0
Total principal repayments		1,150,000,000
Due from joint venture \| Trust Preferred Securities
Principal Repayments and Joint Venture Debt
Remaining 2025		0
2026		0
2027		0
2028		0
2029		0
Thereafter		100,000,000
Total principal repayments		100,000,000
Due from joint venture \| Senior Unsecured Notes
Principal Repayments and Joint Venture Debt
Remaining 2025		100,000,000
2026		0
2027		0
2028		0
2029		0
Thereafter		0
Total principal repayments		$ 100,000,000

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