Investments in Fixed Maturity Securities (HTM Allowance for Credit Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Allowance for expected credit losses, beginning of period	$ 34	$ 53	$ 43	$ 114
Change in expected credit losses	(4)	(5)	(13)	(66)
Allowance for expected credit losses, end of period	$ 30	$ 48	$ 30	$ 48