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Fair Value of Financial Instruments - Carrying Values and Estimated Fair Values of Financial Instruments (Parenthetical) (Details) | Sep. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Percentage of coinsurance costs | 10.00% |  | 10.00%
Level 3 [Member] |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Percentage of coinsurance costs | 10.00% | 10.00% |

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