Corporate Indebtedness - Junior Subordinated Deferrable Interest Debentures and Principal Maturities (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Jun. 30, 2005 USD ($)	Dec. 31, 2023 USD ($) quarter
Principal Repayments and Joint Venture Debt
2024		$ 587,238
2025		470,000
2026		190,148
2027		2,160,000
2028		0
Thereafter		100,000
Repayments of principal		$ 3,507,386
Trust Preferred Securities
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 100,000
Trust Preferred Securities | SOFR
Debt Instrument [Line Items]
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
2024		$ 1,822,978
2025		1,670,861
2026		542,968
2027		1,185,168
2028		0
Thereafter		2,130,300
Repayments of principal		7,352,275
Due from joint ventures | Mortgages and other loans payable
Scheduled Amortization
2024		4,488
2025		0
2026		0
2027		0
2028		0
Thereafter		0
Future Amortization of Debt		4,488
Principal Repayments and Joint Venture Debt
2024		382,750
2025		370,000
2026		190,148
2027		550,000
2028		0
Thereafter		0
Repayments of principal		1,492,898
Due from joint ventures | Revolving Credit Facility
Principal Repayments and Joint Venture Debt
2024		0
2025		0
2026		0
2027		560,000
2028		0
Thereafter		0
Repayments of principal		560,000
Due from joint ventures | Unsecured Term Loans
Principal Repayments and Joint Venture Debt
2024		200,000
2025		0
2026		0
2027		1,050,000
2028		0
Thereafter		0
Repayments of principal		1,250,000
Due from joint ventures | Trust Preferred Securities
Principal Repayments and Joint Venture Debt
2024		0
2025		0
2026		0
2027		0
2028		0
Thereafter		100,000
Repayments of principal		100,000
Due from joint ventures | Senior Unsecured Notes
Principal Repayments and Joint Venture Debt
2024		0
2025		100,000
2026		0
2027		0
2028		0
Thereafter		0
Repayments of principal		$ 100,000