Life and Annuity Benefits (Schedule of Future Policyholder Benefits) (Details) - USD ($) $ in Thousands	Sep. 30, 2024		Dec. 31, 2023	Sep. 30, 2023	[1]	Dec. 31, 2022
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change [Abstract]
Liability for future policyholder benefits	$ 533,395	[1]	$ 557,763	$ 508,436		$ 554,366
Deferred profit liability	54,856		52,287
Other	35,194		39,004
Total	$ 623,445		$ 649,054

[1] The undiscounted liability for future policyholder benefits was $787.6 million and $813.6 million as of September 30, 2024 and 2023, respectively.