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Investments in Real Estate Partnerships - Scheduled Principal Repayments on Notes Payable (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
2024	$ 395,978
2025	465,631
2026	359,273
2027	756,170
2028	343,581
Beyond 5 Years	1,864,200
Unamortized debt premium/(discount) and issuance costs	(30,884)
Total	4,153,949	$ 3,726,754
Unsecured Debt [Member]
Schedule of Equity Method Investments [Line Items]
Total	3,252,755	$ 3,248,373
Unconsolidated Investments in Partnership [Member]
Schedule of Equity Method Investments [Line Items]
2024	37,408
2025	153,316
2026	282,340
2027	40,376
2028	250,872
Beyond 5 Years	746,012
Unamortized debt premium/(discount) and issuance costs	(10,622)
Total	1,499,702
Unconsolidated Investments in Partnership [Member] | Mortgages [Member] | Scheduled Principal Payments [Member]
Schedule of Equity Method Investments [Line Items]
2024	3,718
2025	6,094
2026	7,393
2027	7,576
2028	4,267
Beyond 5 Years	6,688
Unamortized debt premium/(discount) and issuance costs	0
Total	35,736
Unconsolidated Investments in Partnership [Member] | Mortgages [Member] | Mortgage Loan Maturities [Member]
Schedule of Equity Method Investments [Line Items]
2024	33,690
2025	147,222
2026	233,147
2027	32,800
2028	246,605
Beyond 5 Years	739,324
Unamortized debt premium/(discount) and issuance costs	(10,622)
Total	1,422,166
Unconsolidated Investments in Partnership [Member] | Unsecured Debt [Member] | Unsecured Maturities [Member]
Schedule of Equity Method Investments [Line Items]
2024	0
2025	0
2026	41,800
2027	0
2028	0
Beyond 5 Years	0
Unamortized debt premium/(discount) and issuance costs	0
Total	41,800
Unconsolidated Investments in Partnership, Pro-rata Share [Member] [Member]
Schedule of Equity Method Investments [Line Items]
2024	14,678
2025	48,506
2026	89,520
2027	13,669
2028	92,027
Beyond 5 Years	280,328
Unamortized debt premium/(discount) and issuance costs	(3,872)
Total	$ 534,856

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