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Investments (Narrative) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($) security | Dec. 31, 2021 USD ($) security | Dec. 31, 2020 USD ($)
Investments [Abstract] |  |  |
Percentage of fixed maturity portfolio rated investment grade based on NAIC designations | 98.00% | 98.00% |
Number of securities in unrealized loss position | security | 4,510 | 1,427 |
Percentage of unrealized losses on fixed maturity securities where securities are rated investment grade | 98.00% | 85.00% |
Proceeds from sales of available for sale fixed maturity securities | $ 7,800,000 | $ 800,000 | $ 5,400,000
Principal repayments, calls and tenders of available for sale fixed maturity securities | 2,800,000 | 3,700,000 | $ 2,900,000
Cash and invested assets on deposit with state agencies to meet regulatory requirements | 51,000,000 | 49,300,000 |
Fair value, concentration of risk, investments | $ 0 | $ 0 |

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