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Schedule of Other Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Other Assets [Abstract] |  |  |
Goodwill, net | $ 169,560 | $ 173,868 | $ 307,434
Investments | 62,958 | 60,692 |
Prepaid and other | 25,026 | 17,802 |
Furniture, fixtures, and equipment, net | 5,487 | 6,560 |
Deferred financing costs, net | 8,021 | 2,524 |
Total other assets | $ 271,052 | $ 261,446 |

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