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Investments, Summary of Realized Investment Gains (Losses) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Summary of realized investment gains [Abstract] |  |
Gains | $ 4,903 | $ 7,871
Losses | 0 | (451)
Realized investment gains, net | 4,903 | 7,420
Proceeds from Sales of other invested assets [Abstract] |  |
Receivable from sale of other invested assets | 0 | 12,678
Fixed Maturities [Member] |  |
Summary of realized investment gains [Abstract] |  |
Gains | 570 | 835
Losses | 0 | (450)
Realized investment gains, net | 570 | 385
Proceeds from sales of available-for-sale fixed maturities [Abstract] |  |
Sales proceeds | 9,244 | 18,504
Gross gains | 454 | 835
Gross losses | 0 | (450)
Equity Securities [Member] |  |
Summary of realized investment gains [Abstract] |  |
Gains | 0 | 88
Losses | 0 | (1)
Realized investment gains, net | 0 | 87
Proceeds from sales of equity securities [Abstract] |  |
Sales proceeds | 61 | 5
Gross gains | 0 | 0
Gross losses | 0 | (1)
Other Invested Assets [Member] |  |
Summary of realized investment gains [Abstract] |  |
Gains | 4,333 | 6,948
Losses | 0 | 0
Realized investment gains, net | 4,333 | 6,948
Proceeds from Sales of other invested assets [Abstract] |  |
Sales proceeds | 19,761 | 0
Gross gains | 4,333 | 6,948
Gross losses | $ 0 | $ 0

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