Fair Value Measurements (Schedule of Carrying Amounts and Fair Value of Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred financing costs, net and other	$ 39,231	$ 28,829
Mortgages payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred financing costs, net and other	22,076	23,368
Senior unsecured notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred financing costs, net and other	7,724	2,798
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents, carrying amount	410,668	508,812
Debt, carrying amount	7,487,543	7,214,457
Carrying Amount \| Mortgages payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, carrying amount	4,869,543	4,944,037
Carrying Amount \| Senior unsecured notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, carrying amount	850,000	750,000
Carrying Amount \| Unsecured term loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, carrying amount	850,000	800,000
Carrying Amount \| Unsecured revolving credit facilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, carrying amount	918,000	720,420
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, carrying amount	7,211,000	6,988,000
Fair Value \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents, fair value	411,000	509,000
Fair Value \| Mortgages payable \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, carrying amount	4,662,000	4,754,000
Fair Value \| Senior unsecured notes \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, carrying amount	781,000	714,000
Fair Value \| Unsecured term loan \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, carrying amount	850,000	800,000
Fair Value \| Unsecured revolving credit facilities \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, carrying amount	$ 918,000	$ 720,000

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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