Investments - Summary of Fair Value, Including Financial Guarantee, and Weighted-Average Underlying Rating, Excluding Financial Guarantee, of Insured Securities (Phantom) (Details) - USD ($) $ in Thousands |
3 Months Ended | |
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Mar. 31, 2026 |
Mar. 31, 2025 |
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| Investment [Line Items] | ||
| Investment expense | $ (100) | $ 2 |
| Investment income | 2,355 | 2,815 |
| Fixed Income Investments [Member] | ||
| Investment [Line Items] | ||
| Gross Investment Income, Operating | 1,211 | 1,400 |
| Short-Term [Member] | ||
| Investment [Line Items] | ||
| Gross Investment Income, Operating | 1,244 | 1,457 |
| Other Investments [Member] | ||
| Investment [Line Items] | ||
| Gross Investment Income, Operating | $ 0 | $ (79) |
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- Definition Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of expenses related to the generation of investment income. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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