Other Investments (Safehold Inc) (Details) - USD ($) shares in Millions		12 Months Ended
	Mar. 31, 2023	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Safehold Inc.
Schedule of Equity Method Investments [Line Items]
Number of shares owned (in shares)		13.5
Equity interest		18.90%
Safehold Inc. | Maximum
Schedule of Equity Method Investments [Line Items]
Beneficial ownership percentage under which restrictive voting requirements no longer apply	7.50%
Percentage of ownership threshold under which registration rights will terminate.	2.00%
Safehold Management Services | Affiliated entity
Schedule of Equity Method Investments [Line Items]
Annual management fee paid - Year 1			$ 25,000,000
Annual management fee - Year 2	$ 15,000,000
Annual management fee - Year 3	10,000,000
Annual management fee - Year 4	$ 5,000,000
Annual management fee percent of gross book value, year five and thereafter	2.00%
Management fees		$ 17,500,000		$ 19,700,000
Notice required to terminate management agreement with cause	30 days
Termination fee, termination without cause	$ 50,000,000
Termination fee due to liquidation of consolidated assets after third anniversary of agreement	0
Termination fee due to reduction in consolidated assets - Year 2	15,000,000
Termination fee due to reduction in consolidated assets - Year 3	$ 5,000,000
Safehold Management Services | Affiliated entity | Minimum
Schedule of Equity Method Investments [Line Items]
Notice required to terminate management agreement without cause	180 days
Percentage approval of independent directors to terminate management agreement without cause	66.70%