Other Investments (Schedule of Other Investments) (Details) $ / shares in Units, $ in Thousands, shares in Millions		1 Months Ended	12 Months Ended
		Apr. 30, 2022 USD ($)	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) item shares	Mar. 31, 2023 USD ($) shares
Schedule of Equity Method Investments [Line Items]
Carrying value			$ 249,899	$ 316,451
Other investments	[1]		249,899	316,451
Earnings from equity method investments				30,825	$ 45,626
Distribution from real estate equity investee property sale				47,286	10,217
Safehold Inc.
Schedule of Equity Method Investments [Line Items]
Carrying value			$ 249,899	316,430
Earnings from equity method investments				1,089	33,261
Number of shares owned (in shares) | shares			13.5
Closing price (in dollars per share) | $ / shares			$ 18.48
Market value			$ 249,900
Unrealized gain (loss) on equity investment			$ (66,500)	(171,400)
Dilution gain					$ 300
Shares of SAFE allocated from iStar | shares					15.2
Reduction to allocated shares of affiliate based on final terms of Spin-Off | shares						1.8
Carrying value of the adjusted shares of SAFE allocated per final terms of Spin-Off agreement						$ 65,600
Other real estate and strategic equity investments
Schedule of Equity Method Investments [Line Items]
Carrying value				21
Earnings from equity method investments				$ 29,736	$ 12,365
Hotel property
Schedule of Equity Method Investments [Line Items]
Percentage ownership exchanged		50.00%
Carry amount of equity interest exchanged		$ 4,400
Real estate equity investments | Multi-family property sold
Schedule of Equity Method Investments [Line Items]
Earnings from equity method investments					$ 11,500
Number of real estate equity investments | item					1
Distribution from real estate equity investee property sale					$ 15,900
Ground leases
Schedule of Equity Method Investments [Line Items]
Gain on disposal of equity method investment exchanged for land		4,600
Ground leases | Safehold Inc.
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of ground lease		9,000
Gain (loss) from sale of ground lease		0
Ground leases | Hotel property
Schedule of Equity Method Investments [Line Items]
Value of land acquired in exchange		$ 9,000

[1] Refer to Note 2 for details on the Company’s combined and consolidated variable interest entities (“VIEs”).