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Investments - Schedule of Net Investment Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Marketable Securities [Line Items] |  |  |  |
Gross investment income | $ 11,713 |  |  |
Gross investment income |  | $ 5,313 | $ 28,495 | $ 12,925
Investment expenses | (222) | (125) | (567) | (336)
Net investment income | 11,491 | 5,188 | 27,928 | 12,589
U.S. government and government agency |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Gross investment income | 3,793 |  |  |
Gross investment income |  | 1,224 | 11,316 | 2,162
State and municipal |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Gross investment income | 467 |  |  |
Gross investment income |  | 387 | 1,241 | 1,163
Commercial mortgage-backed securities |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Gross investment income | 761 |  |  |
Gross investment income |  | 375 | 1,603 | 1,003
Residential mortgage-backed securities |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Gross investment income | 1,955 |  |  |
Gross investment income |  | 256 | 4,118 | 718
Asset-backed securities |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Gross investment income | 719 |  |  |
Gross investment income |  | 1,044 | 1,760 | 2,537
Corporate |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Gross investment income | 1,611 |  |  |
Gross investment income |  | 925 | 3,614 | 2,514
Short-term investments |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Gross investment income | 134 |  |  |
Gross investment income |  | 186 | 350 | 817
Cash and cash equivalents |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Gross investment income | $ 2,273 |  |  |
Gross investment income |  | $ 916 | $ 4,493 | $ 2,011

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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. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479168/946-830-55-10 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(2)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 + Details
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