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Assets and Liabilities Held For Sale (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019
--- | --- | --- | ---
Transfer of Financial Assets Accounted for as Sales [Line Items] |  |  |
Total investments | $ 19,723,649 | $ 17,368,789 |
Other assets | 298,396 | 346,216 |
Total assets | 30,479,754 | 26,330,094 |
Reserve for claims and claim expenses | 9,365,469 | 9,384,349 | $ 8,484,848
Other liabilities | 342,014 | 932,024 |
Total liabilities | 19,745,483 | 17,287,419 |
Disposal Group, Held-for-sale, Not Discontinued Operations | RenaissanceRe (UK) Limited |  |  |
Transfer of Financial Assets Accounted for as Sales [Line Items] |  |  |
Total investments | 316,401 | 458,731 |
Other assets | 22,527 | 40,284 |
Total assets | 338,928 | 499,015 |
Reserve for claims and claim expenses | 158,826 | 199,436 |
Other liabilities | 3,054 | 925 |
Total liabilities | $ 161,880 | $ 200,361 |

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