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Policyholder Liabilities (Schedule of Reconciliation of Reinsurance Market Risk Benefits by Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Market Risk Benefit [Line Items]    
Asset $ 803,898 $ 838,634
Liability 176,076 179,417
Net asset 627,822 659,217
Fixed Index Annuities    
Market Risk Benefit [Line Items]    
Asset 785,410 820,006
Liability 175,844 179,180
Net asset 609,566 640,826
Fixed Rate Annuities    
Market Risk Benefit [Line Items]    
Asset 18,488 18,628
Liability 232 237
Net asset $ 18,256 $ 18,391