Fair Value Measurements - Components of Other Investments and Methods Used in Estimating Fair Values (Details) - 10.50% Surplus Note	9 Months Ended
Sep. 30, 2026
Debt Instrument [Line Items]
Promissory interest rate	10.50%
Debt instrument, maturity date	2030
Valuation Methodology	Discounted cash flow method/Level 3 inputs

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details