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Reinsurance and Indemnification - Michigan Catastrophic Claims Association (Narrative) (Details) - USD ($) $ in Thousands | 6 Months Ended | 24 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2027 | Jun. 30, 2025 | Dec. 31, 2025 | Dec. 31, 2024
Reinsurance Retention Policy [Line Items] |  |  |  |  |
Assets |  |  |  | $ 119,758,000 | $ 111,617,000
Retained income |  |  |  | 62,393,000 | 53,288,000
Michigan Catastrophic Claim Association |  |  |  |  |
Reinsurance Retention Policy [Line Items] |  |  |  |  |
Reinsurance and indemnification recoverables, net |  |  |  | $ 5,830,000 | $ 6,480,000
Reinsurance increase (as a percent) |  |  |  | 6.00% |
Retention level per claim |  |  | $ 635 |  |
Term of catastrophe reinsurance agreement contract (in years) |  |  | 2 years |  |
Assets | $ 23,190,000 |  | $ 23,190,000 |  |
Retained income | 1,760,000 |  | $ 1,760,000 |  |
Retained earnings accumulated deficit decrease | $ 50,000,000 |  |  |  |
Michigan Catastrophic Claim Association | Forecast |  |  |  |  |
Reinsurance Retention Policy [Line Items] |  |  |  |  |
Retention level per claim |  | $ 675 |  |  |
Term of catastrophe reinsurance agreement contract (in years) |  | 2 years |  |  |

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