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Investments, Summary of Realized Investment Gains (Losses) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Summary of realized investment gains (losses) [Abstract] |  |  |  |
Gains | $ 0 | $ 101 | $ 70 | $ 101
Losses | 0 | 0 | 0 | (72)
Realized investment losses (gains), net | 0 | 101 | 70 | 29
Fixed Maturities [Member] |  |  |  |
Summary of realized investment gains (losses) [Abstract] |  |  |  |
Gains | 0 | 101 | 70 | 101
Losses | 0 | 0 | 0 | (53)
Realized investment losses (gains), net | 0 | 101 | 70 | 48
Equity Securities [Member] |  |  |  |
Summary of realized investment gains (losses) [Abstract] |  |  |  |
Gains | 0 | 0 | 0 | 0
Losses | 0 | 0 | 0 | 0
Realized investment losses (gains), net | 0 | 0 | 0 | 0
Other Invested Assets [Member] |  |  |  |
Summary of realized investment gains (losses) [Abstract] |  |  |  |
Gains | 0 | 0 | 0 | 0
Losses | 0 | 0 | 0 | (19)
Realized investment losses (gains), net | $ 0 | $ 0 | $ 0 | $ (19)

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- Definition Amount of realized gain (loss) on investment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 + Details
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