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Catastrophe Reinsurance - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Liability for Catastrophe Claims [Line Items] |  |  |
Catastrophic events classification by amount | $ 25,000,000.0 |  |
Incurred losses and LAE related to prior year (favorable) adverse development | 22,600,000 |  | $ (14,600,000)
Non-Core Operations |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Incurred losses and LAE related to prior year (favorable) adverse development |  | $ 24,800,000 |
Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Incurred losses and LAE related to prior year (favorable) adverse development | 6,000,000.0 | (9,100,000) | (4,100,000)
Catastrophe | Non-Core Operations |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Incurred losses and LAE related to prior year (favorable) adverse development | 5,400,000 | (7,600,000) | (6,200,000)
Catastrophe | Life Insurance | Operating Segments |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Incurred losses and LAE related to prior year (favorable) adverse development | (100,000) | 800,000 | 1,500,000
Catastrophe | Specialty Property & Casualty Insurance | Operating Segments |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Incurred losses and LAE related to prior year (favorable) adverse development | $ 700,000 | $ (2,300,000) | $ 600,000

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