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Other Investments (Schedule of Other Investments) (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Schedule of Equity Method Investments [Line Items] |  |  |
Other investments | $ 1,297,281 | $ 1,097,562 |
Earnings (losses) from equity method investments | 154,344 | 39,472 | $ 42,378
Interest expense | 115,400 | 126,828 | 141,699
Mark-to-market gain | $ 18,900 | 23,900 |
Safehold Inc. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Number of shares owned (in shares) | 36.6 |  |
Closing price (in dollars per share) | $ 79.85 |  |
Market value | $ 2,900,000 |  |
Dilution gain | 60,700 | 14,400 | 7,600
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Other strategic investments |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Other investments | 66,770 | 69,911 |
Earnings (losses) from equity method investments | 9,345 | (1,075) | (6)
Real estate equity investments |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Carrying value | 1,230,511 | 1,027,651 |
Earnings (losses) from equity method investments | 144,999 | 40,547 | 42,384
Real estate equity investments | Safehold Inc. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Carrying value | 1,168,532 | 937,712 |
Earnings (losses) from equity method investments | 108,393 | 53,476 | 29,764
Real estate equity investments | Other real estate equity investments |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Carrying value | 61,979 | 89,939 |
Earnings (losses) from equity method investments | $ 36,606 | $ (12,929) | $ 12,620

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