Deferred Policy Acquisition Costs, Deferred Reinsurance Losses, Deferred Reinsurance Gains And Deferred Sales Inducements (Balance of and Changes in DSI) (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022
Movement in Deferred Sales Inducements [Roll Forward]
Balance, beginning of period	[1]	$ 381,504
Balance, end of period		366,916
Variable Annuities
Movement in Deferred Sales Inducements [Roll Forward]
Balance, beginning of period		381,504	$ 414,619
Capitalization		1,503	664
Amortization expense		(16,088)	(17,191)
Other		(3)	0
Balance, end of period		$ 366,916	$ 398,092

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