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Other Investments (Summarized Investee Financial Information) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Schedule of Equity Method Investments [Line Items]
Revenues	$ 43,571		$ 38,412	$ 85,837	$ 106,026
Expenses	44,875		49,837	130,058	160,381
Net Income (Loss)	$ (81,814)		$ 17,511	$ (262,490)	(3,899)
Safehold Inc.
Schedule of Equity Method Investments [Line Items]
Revenues		$ 78,329			196,943
Expenses		75,875			136,517
Net Income (Loss)		$ 4,682			$ 113,628

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