Corporate Indebtedness - Junior Subordinated Deferrable Interest Debentures and Principal Maturities (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Jun. 30, 2005 USD ($)	Dec. 31, 2024 USD ($) quarter
Principal Repayments and Joint Venture Debt
2025		$ 473,551
2026		290,148
2027		2,280,000
2028		205,000
2029		0
Thereafter		372,325
Repayments of principal		$ 3,621,024
Trust Preferred Securities
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 100,000
Interest rate added to base rate (as a percent)		0.26%
Interest payment deferment, number of consecutive quarters | quarter		8
Due from joint ventures
Principal Repayments and Joint Venture Debt
2025		$ 1,198,400
2026		936,639
2027		1,710,229
2028		382,294
2029		0
Thereafter		1,800,300
Repayments of principal		6,027,862
Due from joint ventures | Mortgages and other loans payable
Scheduled Amortization
2025		0
2026		0
2027		0
2028		0
2029		0
Thereafter		0
Future Amortization of Debt		0
Principal Repayments and Joint Venture Debt
2025		373,551
2026		190,148
2027		910,000
2028		205,000
2029		0
Thereafter		272,325
Repayments of principal		1,951,024
Due from joint ventures | Revolving Credit Facility
Principal Repayments and Joint Venture Debt
2025		0
2026		0
2027		320,000
2028		0
2029		0
Thereafter		0
Repayments of principal		320,000
Due from joint ventures | Unsecured Term Loans
Principal Repayments and Joint Venture Debt
2025		0
2026		100,000
2027		1,050,000
2028		0
2029		0
Thereafter		0
Repayments of principal		1,150,000
Due from joint ventures | Trust Preferred Securities
Principal Repayments and Joint Venture Debt
2025		0
2026		0
2027		0
2028		0
2029		0
Thereafter		100,000
Repayments of principal		100,000
Due from joint ventures | Senior Unsecured Notes
Principal Repayments and Joint Venture Debt
2025		100,000
2026		0
2027		0
2028		0
2029		0
Thereafter		0
Repayments of principal		$ 100,000