Investments (Credit Losses Recognized In Earnings on Fixed Maturity Securities Held by the Company) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 42,828	$ 1,650	$ 40,414	$ 2,008
Additions to allowance for credit losses not previously recorded	0	344	5,512	401
Reductions for securities sold during the period	(2)	(1)	(78)	(42)
Additions (reductions) on securities with previous allowance	1,685	1,355	2,811	502
Assets transferred to parent and affiliates				479
Write-downs charged against the allowance	(27,542)		(31,690)
Balance, end of period	16,969	3,348	16,969	3,348
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
Write-downs charged against the allowance	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	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
Write-downs charged against the allowance	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	42,828	1,650	40,414	2,000
Additions to allowance for credit losses not previously recorded	0	339	5,512	396
Reductions for securities sold during the period	(2)	(1)	(78)	(42)
Additions (reductions) on securities with previous allowance	1,685	1,355	2,811	510
Assets transferred to parent and affiliates				479
Write-downs charged against the allowance	(27,542)		(31,690)
Balance, end of period	16,969	3,343	16,969	3,343
Asset-backed securities
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	0	0	0	1
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	(1)
Assets transferred to parent and affiliates				0
Write-downs charged against the allowance	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
Write-downs charged against the allowance	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	0	0	0	7
Additions to allowance for credit losses not previously recorded	0	5	0	5
Reductions for securities sold during the period	0	0	0	0
Additions (reductions) on securities with previous allowance	0	0	0	(7)
Assets transferred to parent and affiliates				0
Write-downs charged against the allowance	0		0
Balance, end of period	$ 0	$ 5	$ 0	$ 5