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Policyholders' Liabilities - Policyholder Account Balance (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Policyholder Account Balance [Line Items]    
Balance, beginning of year $ 226,159  
Balance, end of year 252,756 $ 226,159
Supplemental Contracts Without Life Contingencies    
Policyholder Account Balance [Line Items]    
Balance, beginning of year 60,414 44,569
Policyholder Account Balance, Issuance 34,887 24,241
Policyholder Account Balance, Premium Received 323 438
Policyholder Account Balance, Interest Credited 2,850 2,031
Policyholder Account Balance, Increase (Decrease) from Other Change   5
Policyholder Account Balance, Surrender and Withdrawal 0 0
Policyholder Account Balance, Benefit Payment 12,692 10,870
Balance, end of year $ 85,782 $ 60,414
Policyholder Account Balance, Weighted Average Crediting Rate 4.10% 4.01%
Policyholder Account Balance, Cash Surrender Value $ 85,782 $ 60,414
Fixed Annuity    
Policyholder Account Balance [Line Items]    
Balance, beginning of year 88,080 87,134
Policyholder Account Balance, Issuance 4,660 3,263
Policyholder Account Balance, Premium Received 4,816 4,201
Policyholder Account Balance, Interest Credited 3,167 2,790
Policyholder Account Balance, Increase (Decrease) from Other Change   0
Policyholder Account Balance, Surrender and Withdrawal 12,426 9,308
Policyholder Account Balance, Benefit Payment 0 0
Balance, end of year $ 88,297 $ 88,080
Policyholder Account Balance, Weighted Average Crediting Rate 3.97% 3.73%
Policyholder Account Balance, Cash Surrender Value $ 88,297 $ 88,080
Dividend Accumulations    
Policyholder Account Balance [Line Items]    
Balance, beginning of year 47,768 44,960
Policyholder Account Balance, Issuance 796 779
Policyholder Account Balance, Premium Received 5,973 5,703
Policyholder Account Balance, Interest Credited 2,301 1,827
Policyholder Account Balance, Increase (Decrease) from Other Change   0
Policyholder Account Balance, Surrender and Withdrawal 5,478 5,501
Policyholder Account Balance, Benefit Payment 0 0
Balance, end of year $ 51,360 $ 47,768
Policyholder Account Balance, Weighted Average Crediting Rate 3.90% 3.58%
Policyholder Account Balance, Cash Surrender Value $ 51,360 $ 47,768
Premiums Paid In Advance    
Policyholder Account Balance [Line Items]    
Balance, beginning of year 29,897 31,039
Policyholder Account Balance, Issuance 4,629 5,820
Policyholder Account Balance, Premium Received 791 778
Policyholder Account Balance, Interest Credited 816 800
Policyholder Account Balance, Increase (Decrease) from Other Change   0
Policyholder Account Balance, Surrender and Withdrawal 8,816 8,540
Policyholder Account Balance, Benefit Payment 0 0
Balance, end of year $ 27,317 $ 29,897
Policyholder Account Balance, Weighted Average Crediting Rate 3.25% 3.02%
Policyholder Account Balance, Cash Surrender Value $ 27,317 $ 29,897