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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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