Investments (Credit Losses Recognized In Earnings on Fixed Maturity Securities Held by the Company) (Details) - Fixed maturities - Available-for-sale - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Balance, beginning of period	$ 3,727	$ 20,725	$ 4,769	$ 4,149
Additions to allowance for credit losses not previously recorded	242	2,904	3,165	12,491
Reductions for securities sold during the period	(41)	(1,203)	(3,775)	(1,206)
Reductions for securities with intent to sell	0	(16,990)	0	(16,990)
Additions (reductions) on securities with previous allowance	995	(626)	764	6,366
Balance, end of period	4,923	4,810	4,923	4,810
U.S. Treasury securities and obligations of U.S. government authorities and agencies
Debt Securities, Available-for-sale [Line Items]
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
Reductions for securities with intent to sell	0	0	0	0
Additions (reductions) on securities with previous allowance	0	0	0	0
Balance, end of period	0	0	0	0
Foreign Government Bonds
Debt Securities, Available-for-sale [Line Items]
Balance, beginning of period	0	399	5	11
Additions to allowance for credit losses not previously recorded	0	0	0	329
Reductions for securities sold during the period	0	(1)	(1)	(4)
Reductions for securities with intent to sell	0	(324)	0	(324)
Additions (reductions) on securities with previous allowance	0	42	(4)	104
Balance, end of period	0	116	0	116
U.S. and Foreign Corporate Securities
Debt Securities, Available-for-sale [Line Items]
Balance, beginning of period	3,720	20,326	4,755	4,138
Additions to allowance for credit losses not previously recorded	242	2,904	3,165	12,162
Reductions for securities sold during the period	(41)	(1,202)	(3,774)	(1,202)
Reductions for securities with intent to sell	0	(16,666)	0	(16,666)
Additions (reductions) on securities with previous allowance	996	(668)	771	6,262
Balance, end of period	4,917	4,694	4,917	4,694
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
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
Reductions for securities with intent to sell	0	0	0	0
Additions (reductions) on securities with previous allowance	0	0	0	0
Balance, end of period	0	0	0	0
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
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
Reductions for securities with intent to sell	0	0	0	0
Additions (reductions) on securities with previous allowance	0	0	0	0
Balance, end of period	0	0	0	0
Residential Mortgage-Backed Securities
Debt Securities, Available-for-sale [Line Items]
Balance, beginning of period	7	0	9	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
Reductions for securities with intent to sell	0	0	0	0
Additions (reductions) on securities with previous allowance	(1)	0	(3)	0
Balance, end of period	$ 6	$ 0	$ 6	$ 0