Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument
Deferred financing costs, net and other	$ (55,880)	$ (63,572)
Total, net	5,714,761	5,829,018
Long term debt	$ 2,562,574	2,560,025
Mortgages Payable:
Debt Instrument
Interest rate, end of period	4.48%
Long-term debt, gross	$ 5,758,215	5,877,615
Deferred financing costs, net and other	(43,454)	(48,597)
Total, net	$ 5,714,761	5,829,018
Mortgages Payable: | Fixed rate
Debt Instrument
Interest rate, end of period	3.63%
Long-term debt, gross	$ 3,568,650	3,570,000
Mortgages Payable: | Variable rate
Debt Instrument
Interest rate, end of period	5.87%
Long-term debt, gross	$ 2,189,565	2,307,615
Mortgages Payable: | Variable rate | Interest Rate Cap
Debt Instrument
Derivative, notional amount	$ 2,009,119
Cap strike rate	4.17%
Derivative, average remaining maturity	7 months
Unsecured Debt:
Debt Instrument
Interest rate, end of period	3.02%
Long-term debt, gross	$ 1,200,000	1,200,000
Deferred financing costs, net and other	(6,638)	(8,168)
Long term debt	$ 1,193,362	1,191,832
Unsecured term loan
Debt Instrument
Interest rate, end of period	4.04%
Long-term debt, gross	$ 800,000	800,000
Deferred financing costs, net and other	(5,788)	(6,807)
Long term debt	$ 794,212	793,193
Unsecured revolving credit facilities
Debt Instrument
Interest rate, end of period	3.87%
Long term debt	$ 575,000	$ 575,000