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Fair Values - (Carrying Value and Fair Value of Financial Instruments) (Details) - USD ($) $ in Thousands, shares in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Book and estimated fair values of financial instruments |  |
Equity method investments | $ 240,986 | $ 587,138
Safehold Inc. |  |
Book and estimated fair values of financial instruments |  |
Equity method investments | $ 240,703 | 554,733
Number of shares owned (in shares) | 13.5 |
Carrying Value |  |
Book and estimated fair values of financial instruments |  |
Loans receivable and other lending investments | $ 20 | 49
Loans receivable held for sale | 0 | 38
Cash and cash equivalents | 46 | 4
Restricted cash | 6 | 3
Debt obligations, net | 213 |
Carrying Value | Safehold Inc. |  |
Book and estimated fair values of financial instruments |  |
Equity method investments | 241 |
Fair Value |  |
Book and estimated fair values of financial instruments |  |
Loans receivable and other lending investments | 17 | 46
Loans receivable held for sale | 0 | 38
Cash and cash equivalents | 46 | 4
Restricted cash | 6 | $ 3
Debt obligations, net | 213 |
Fair Value | Safehold Inc. |  |
Book and estimated fair values of financial instruments |  |
Equity method investments | $ 241 |

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