Deferred Policy Acquisition Costs, Deferred Reinsurance Losses, Deferred Reinsurance Gains And Deferred Sales Inducements (Balance of and Changes in DSI) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021
Movement in Deferred Sales Inducements [Roll Forward]
Beginning Balance	[1]	$ 381,504
Ending Balance		351,424	$ 381,504	[1]
Variable Annuties
Movement in Deferred Sales Inducements [Roll Forward]
Beginning Balance		381,504	414,619		$ 0
Capitalization		1,514	676		167
Amortization expense		(31,625)	(33,791)		(17,885)
Other adjustments		31			432,337
Ending Balance		$ 351,424	$ 381,504		$ 414,619

[1] Prior period amounts reflect the implementation of Accounting Standard Update ("ASU") 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.