v3.26.1
Policy Liabilities - Schedule of Policyholder Account Balance, Guaranteed Minimum Crediting Rate (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Interest Sensitive Life            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates $ 706,527 $ 708,729 $ 711,687 $ 717,140 $ 720,269 $ 723,389
Interest Sensitive Life | Less than 3.00% | At guaranteed minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 3.00%     3.00%    
Range of guaranteed minimum crediting rates $ 0     $ 0    
Interest Sensitive Life | 3.00%-3.99% | At guaranteed minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates $ 29,413     $ 29,395    
Interest Sensitive Life | 3.00%-3.99% | At guaranteed minimum | Minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 3.00%     3.00%    
Interest Sensitive Life | 3.00%-3.99% | At guaranteed minimum | Maximum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 3.99%     3.99%    
Interest Sensitive Life | 4.00%-4.99% | At guaranteed minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates $ 587,960     $ 598,244    
Interest Sensitive Life | 4.00%-4.99% | At guaranteed minimum | Minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 4.00%     4.00%    
Interest Sensitive Life | 4.00%-4.99% | At guaranteed minimum | Maximum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 4.99%     4.99%    
Interest Sensitive Life | Greater than 5.00% | At guaranteed minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 5.00%     5.00%    
Range of guaranteed minimum crediting rates $ 89,154     $ 89,501    
Deferred Annuity            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 550,688 568,078 580,669 615,897 636,219 656,573
Amount reinsured with third-party reinsurers under existing reinsurance agreements 377,000     427,000    
Deferred Annuity | Less than 3.00% | At guaranteed minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 2,090     2,244    
Deferred Annuity | 3.00%-3.99% | At guaranteed minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 378,618     436,884    
Deferred Annuity | 4.00%-4.99% | At guaranteed minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 169,980     176,769    
Deferred Annuity | Greater than 5.00% | At guaranteed minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 0     0    
Other Policy-holders' Funds            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 577,940 $ 576,452 $ 532,047 492,146 $ 463,148 $ 468,604
Other Policy-holders' Funds | Less than 3.00% | At guaranteed minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 485,407     398,451    
Other Policy-holders' Funds | 3.00%-3.99% | At guaranteed minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 3,170     3,140    
Other Policy-holders' Funds | 4.00%-4.99% | At guaranteed minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates 54,836     55,368    
Other Policy-holders' Funds | Greater than 5.00% | At guaranteed minimum            
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]            
Range of guaranteed minimum crediting rates $ 34,527     $ 35,187