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Other Investments (Schedule of Other Investments) (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Carrying value		$ 1,556,792		$ 1,556,792		$ 1,297,281
Other investments	[1]	1,556,792		1,556,792		1,297,281
Earnings (losses) from equity method investments		19,393	$ 11,098	44,425	$ 22,866
Interest expense		$ 24,149	28,641	$ 53,392	57,450
Mark-to-market gain					5,100
Safehold Inc.
Schedule of Equity Method Investments [Line Items]
Number of shares owned (in shares)		40.1		40.1
Closing price (in dollars per share)		$ 35.37		$ 35.37
Market value		$ 1,400,000		$ 1,400,000
Dilution gain				900	500
Other strategic investments
Schedule of Equity Method Investments [Line Items]
Other investments		47,281		47,281		66,770
Earnings (losses) from equity method investments		380	2,856	4,003	3,814
Real estate equity investments
Schedule of Equity Method Investments [Line Items]
Carrying value		1,509,511		1,509,511		1,230,511
Earnings (losses) from equity method investments		19,013	8,242	40,422	19,052
Real estate equity investments | Safehold Inc.
Schedule of Equity Method Investments [Line Items]
Carrying value		1,405,985		1,405,985		1,168,532
Earnings (losses) from equity method investments		14,720	9,703	31,749	21,115
Real estate equity investments | Ground Lease Plus Fund
Schedule of Equity Method Investments [Line Items]
Carrying value		65,068		65,068		17,630
Earnings (losses) from equity method investments		520		1,289
Real estate equity investments | Other real estate equity investments
Schedule of Equity Method Investments [Line Items]
Carrying value		38,458		38,458		$ 44,349
Earnings (losses) from equity method investments		$ 3,773	$ (1,461)	$ 7,384	$ (2,063)
[1] Refer to Note 2 for details on the Company’s consolidated variable interest entities (“VIEs”).

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