Reinsurance and Retrocessional Reinsurance (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
Sep. 30, 2025 |
Dec. 31, 2024 |
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| Insurance [Abstract] | ||||
| Reinsurance recoverable on reserves for losses and loss adjustment expenses | $ 1,312.4 | $ 1,195.6 | $ 1,131.8 | $ 1,255.6 |
| Reinsurance recoverable for paid claims and claims adjustments | 366.0 | 438.7 | ||
| Reinsurance recoverables on paid losses, allowance | 0.3 | 0.3 | ||
| Reinsurance recoverables on unpaid losses, allowance | $ 0.9 | $ 0.9 |
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- References No definition available.
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- Definition Amount, after valuation allowance, recoverable under reinsurance contracts for losses reported to the ceding insurer but not yet paid and amounts expected for incurred losses and settlement expenses, which have not yet been reported to the ceding insurer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after valuation allowance, recoverable under reinsurance contracts for losses reported to and paid by the ceding insurer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of valuation allowance for reinsurance recoverables on paid losses. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of valuation allowance for reinsurance recoverables for losses reported to the ceding insurer but not yet paid, and for amounts expected based upon statistical projections and other measures of incurred losses and loss settlement expenses which have not yet been reported to the ceding insurer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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