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Investment Information - Other investments (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Schedule Of Other Investments [Line Items] |  |
Other investments, at fair value | $ 1,578,751 | $ 1,973,550
Fixed maturities |  |
Schedule Of Other Investments [Line Items] |  |
Other investments, at fair value | 530,303 | 416,698
Other investments |  |
Schedule Of Other Investments [Line Items] |  |
Other investments, at fair value | 1,005,929 | 1,432,553
Other investments | Lending |  |
Schedule Of Other Investments [Line Items] |  |
Other investments, at fair value | 398,789 | 536,345
Other investments | Investment grade fixed income |  |
Schedule Of Other Investments [Line Items] |  |
Other investments, at fair value | 229,262 | 147,810
Other investments | Term loan investments |  |
Schedule Of Other Investments [Line Items] |  |
Other investments, at fair value | 151,649 | 484,950
Other investments | Private equity |  |
Schedule Of Other Investments [Line Items] |  |
Other investments, at fair value | 117,856 | 91,126
Other investments | Energy |  |
Schedule Of Other Investments [Line Items] |  |
Other investments, at fair value | 55,250 | 81,692
Other investments | Credit related funds |  |
Schedule Of Other Investments [Line Items] |  |
Other investments, at fair value | 53,123 | 70,278
Other investments | Infrastructure |  |
Schedule Of Other Investments [Line Items] |  |
Other investments, at fair value | 0 | 20,352
Short-term investments |  |
Schedule Of Other Investments [Line Items] |  |
Other investments, at fair value | 28,614 | 97,806
Equity securities |  |
Schedule Of Other Investments [Line Items] |  |
Other investments, at fair value | $ 13,905 | $ 26,493

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