Deferred Policy Acquisition Costs, Deferred Reinsurance Losses, Deferred Reinsurance Gains And Deferred Sales Inducements (Balance of and Changes in DSI) (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022
Movement in Deferred Sales Inducements [Roll Forward]
Balance, beginning of period	[1]	$ 381,504
Balance, end of period		359,674
Variable Annuities
Movement in Deferred Sales Inducements [Roll Forward]
Balance, beginning of period		381,504	$ 414,619
Capitalization		2,053	751
Amortization expense		(23,881)	(25,546)
Other		(2)	0
Balance, end of period		$ 359,674	$ 389,824

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