Deferred Policy Acquisition Costs, Deferred Reinsurance Losses, Deferred Reinsurance Gains And Deferred Sales Inducements (Balance of and Changes in Deferred Reinsurance Losses) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Reinsurance Recoverable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 292,893	$ 333,003
Amortization expense	(28,633)	(30,066)
Other	(8)	(8)
Balance, end of period	264,252	302,929
Variable Annuities
Reinsurance Recoverable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	223,515	254,577
Amortization expense	(22,283)	(23,225)
Other	(8)	(8)
Balance, end of period	201,224	231,344
Term Life
Reinsurance Recoverable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	69,378	78,426
Amortization expense	(6,350)	(6,841)
Other	0	0
Balance, end of period	$ 63,028	$ 71,585