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Fair Value Measurements - Summary of Carrying Value and Estimated Fair Value of Company's Financial Instruments Not Carried at Fait Value (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Carrying Value |  |
Fair Value Assets Measured On Recurring Basis [Line Items] |  |
Surplus note | $ 618 | $ 1,029
Estimated Fair Value |  |
Fair Value Assets Measured On Recurring Basis [Line Items] |  |
Surplus note | $ 499 | $ 885

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