Investments (Credit Losses Recognized In Earnings on Fixed Maturity Securities Held by the Company) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 3,348	$ 4,923	$ 2,008	$ 4,769
Additions to allowance for credit losses not previously recorded	12,026	374	12,427	3,539
Reductions for securities sold during the period	0	(1,280)	(42)	(5,055)
Additions (reductions) on securities with previous allowance	(799)	298	(297)	1,062
Assets transferred to parent and affiliates	0		479
Balance, end of period	14,575	4,315	14,575	4,315
U.S. Treasury securities and obligations of U.S. government authorities and agencies
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	0	0	0	0
Additions to allowance for credit losses not previously recorded	0	0	0	0
Reductions for securities sold during the period	0	0	0	0
Additions (reductions) on securities with previous allowance	0	0	0	0
Assets transferred to parent and affiliates	0		0
Balance, end of period	0	0	0	0
Foreign Government Securities
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	0	0	0	5
Additions to allowance for credit losses not previously recorded	0	0	0	0
Reductions for securities sold during the period	0	0	0	(1)
Additions (reductions) on securities with previous allowance	0	0	0	(4)
Assets transferred to parent and affiliates	0		0
Balance, end of period	0	0	0	0
U.S. and Foreign Corporate Securities
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	3,343	4,917	2,000	4,755
Additions to allowance for credit losses not previously recorded	12,026	374	12,422	3,539
Reductions for securities sold during the period	0	(1,280)	(42)	(5,054)
Additions (reductions) on securities with previous allowance	(794)	296	(284)	1,067
Assets transferred to parent and affiliates	0		479
Balance, end of period	14,575	4,307	14,575	4,307
Asset-backed securities
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	0	0	1	0
Additions to allowance for credit losses not previously recorded	0	0	0	0
Reductions for securities sold during the period	0	0	0	0
Additions (reductions) on securities with previous allowance	0	0	(1)	0
Assets transferred to parent and affiliates	0		0
Balance, end of period	0	0	0	0
Commercial mortgage-backed securities
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	0	0	0	0
Additions to allowance for credit losses not previously recorded	0	0	0	0
Reductions for securities sold during the period	0	0	0	0
Additions (reductions) on securities with previous allowance	0	0	0	0
Assets transferred to parent and affiliates	0		0
Balance, end of period	0	0	0	0
Residential Mortgage-Backed Securities
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	5	6	7	9
Additions to allowance for credit losses not previously recorded	0	0	5	0
Reductions for securities sold during the period	0	0	0	0
Additions (reductions) on securities with previous allowance	(5)	2	(12)	(1)
Assets transferred to parent and affiliates	0		0
Balance, end of period	$ 0	$ 8	$ 0	$ 8