Investments in and Advances to Unconsolidated Affiliates - Schedule of Investments (Parenthetical) (Details) - USD ($) $ in Thousands, shares in Millions	12 Months Ended
	Dec. 31, 2023		Dec. 31, 2022	Dec. 31, 2021	Jan. 31, 2023	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Credit loss reserves	$ 124,949	[1]	$ 123,903
Allowance for credit losses	1,279	[1]	898	$ 5,752		$ 1,218
Interest income	19,993		$ 14,641	$ 9,065
Cost method investments effective ownership interest			1.00%
Core Portfolio
Schedule of Equity Method Investments [Line Items]
Credit loss reserves	$ 124,949
1238 Wisconsin Avenue
Schedule of Equity Method Investments [Line Items]
Debt Instrument, Description of Variable Rate Basis	The loan is collateralized by the venture members' equity interest in the entity that holds the 1238 Wisconsin development property, bears interest at Prime + 1.0% subject to a 4.5% floor, and matures on December 28, 2024.
1238 Wisconsin Avenue | Core Portfolio
Schedule of Equity Method Investments [Line Items]
Construction commitment	$ 12,800
Credit loss reserves	12,800		$ 7,500
Allowance for credit losses	100		100
Interest income	$ 200
1238 Wisconsin Avenue | Core Portfolio | Maximum
Schedule of Equity Method Investments [Line Items]
Interest income			100
Shoppes at South Hills
Schedule of Equity Method Investments [Line Items]
Bridge Loan			$ 31,700
Mervyns II
Schedule of Equity Method Investments [Line Items]
Cost method investments effective ownership, shares			4.1		2.5

[1] The aggregate carrying amount of notes receivable included above for Federal income tax purposes was approximately $126.2 million as of December 31, 2023.