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Life And Annuity Benefits (Schedule of Liability for Future Policy Benefit, Activity) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Liability for Future Policy Benefits Activity [Abstract]        
Liability for future policyholder benefits, beginning of year $ 554,366 [1] $ 821,632 $ 976,905  
Liability for future policyholder benefits at original discount rate, beginning of year 667,761 745,313 838,041  
Effect of changes in cash flow assumptions   0 0 $ 0
Effect of actual variances from expected experience   (5,890) (3,859) (4,208)
Adjusted liability for future policyholder benefits, beginning of year   661,871 741,454 $ 833,833
Interest accretion 14,889 15,625 17,992  
Benefit payments (52,588) (53,232) (60,277)  
Effect of foreign currency rate changes 18,705 (36,086) (46,235)  
Liability for future policyholder benefits at original discount rate, end of year 642,877 667,761 745,313  
Cumulative effect of changes in discount rate assumptions (85,114) (113,395) 76,319  
Liability for future policyholder benefits, end of year $ 557,763 [1] $ 554,366 [1] $ 821,632  
[1] The undiscounted liability for future policyholder benefits was $824.6 million and $861.3 million as of December 31, 2023 and 2022, respectively.