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Other Investments (Schedule of Other Investments) (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Carrying value		$ 1,605,268		$ 1,605,268		$ 1,297,281
Other investments	[1]	1,605,268		1,605,268		1,297,281
Earnings (losses) from equity method investments		57,797	$ 87,795	102,222	$ 110,661
Distribution from real estate equity investee property sale				161,275	34,926
Interest expense		$ 22,664	28,695	$ 76,056	86,145
Mark-to-market gain			14,000		19,100
Safehold Inc.
Schedule of Equity Method Investments [Line Items]
Number of shares owned (in shares)		40.3		40.3
Closing price (in dollars per share)		$ 26.46		$ 26.46
Market value		$ 1,100,000		$ 1,100,000
Dilution gain			60,200	900	60,700
Other strategic investments
Schedule of Equity Method Investments [Line Items]
Other investments		46,191		46,191		66,770
Earnings (losses) from equity method investments		1,907	2,355	5,910	6,169
Real estate equity investments
Schedule of Equity Method Investments [Line Items]
Carrying value		1,559,077		1,559,077		1,230,511
Earnings (losses) from equity method investments		55,890	85,440	96,312	104,492
Real estate equity investments | Safehold Inc.
Schedule of Equity Method Investments [Line Items]
Carrying value		1,459,476		1,459,476		1,168,532
Earnings (losses) from equity method investments		42,800	73,475	74,549	94,590
Real estate equity investments | Ground Lease Plus Fund
Schedule of Equity Method Investments [Line Items]
Carrying value		65,793		65,793		17,630
Earnings (losses) from equity method investments		725		2,014
Real estate equity investments | Other real estate equity investments
Schedule of Equity Method Investments [Line Items]
Carrying value		33,808		33,808		$ 44,349
Earnings (losses) from equity method investments		12,365	$ 11,965	19,749	$ 9,902
Real estate equity investments | Multi-family property sold
Schedule of Equity Method Investments [Line Items]
Earnings (losses) from equity method investments				11,500
Distribution from real estate equity investee property sale		$ 15,900		$ 15,900
[1] Refer to Note 2 for details on the Company’s consolidated variable interest entities (“VIEs”).

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