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Investments, Securities with Continuous Unrealized Loss Position (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 USD ($) Securities | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) Securities | Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) Securities
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract] |  |  |  |  |
Less than 12 months | $ 18,486 |  | $ 18,486 |  | $ 6,878
12 months or longer | 177,600 |  | 177,600 |  | 183,695
Total | 196,086 |  | 196,086 |  | 190,573
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract] |  |  |  |  |
Less than 12 months | 702 |  | 702 |  | 53
12 months or longer | 24,769 |  | 24,769 |  | 21,638
Total | $ 25,471 |  | $ 25,471 |  | $ 21,691
Number of securities in unrealized loss position | Securities | 225 |  | 225 |  | 222
Allowance for expected credit losses on available-for-sale fixed maturities | $ 0 |  | $ 0 |  | $ 0
Realized investment gains | 13 | $ 70 | 13 | $ 70 |
U.S. Treasury Securities and Obligations of U.S. Government Agencies and Authorities [Member] |  |  |  |  |
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract] |  |  |  |  |
Less than 12 months | 2,807 |  | 2,807 |  | 5,194
12 months or longer | 37,897 |  | 37,897 |  | 39,476
Total | 40,704 |  | 40,704 |  | 44,670
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract] |  |  |  |  |
Less than 12 months | 41 |  | 41 |  | 37
12 months or longer | 4,814 |  | 4,814 |  | 4,907
Total | 4,855 |  | 4,855 |  | 4,944
Allowance for expected credit losses on available-for-sale fixed maturities | 0 |  | 0 |  | 0
Obligations of States and Political Subdivisions [Member] |  |  |  |  |
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract] |  |  |  |  |
Less than 12 months | 0 |  | 0 |  | 1,145
12 months or longer | 6,699 |  | 6,699 |  | 5,936
Total | 6,699 |  | 6,699 |  | 7,081
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract] |  |  |  |  |
Less than 12 months | 0 |  | 0 |  | 3
12 months or longer | 1,426 |  | 1,426 |  | 1,421
Total | 1,426 |  | 1,426 |  | 1,424
Allowance for expected credit losses on available-for-sale fixed maturities | 0 |  | 0 |  | 0
Corporate Securities [Member] |  |  |  |  |
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract] |  |  |  |  |
Less than 12 months | 15,679 |  | 15,679 |  | 539
12 months or longer | 133,004 |  | 133,004 |  | 138,283
Total | 148,683 |  | 148,683 |  | 138,822
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract] |  |  |  |  |
Less than 12 months | 661 |  | 661 |  | 13
12 months or longer | 18,529 |  | 18,529 |  | 15,310
Total | 19,190 |  | 19,190 |  | 15,323
Allowance for expected credit losses on available-for-sale fixed maturities | $ 0 |  | $ 0 |  | $ 0

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