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		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Balance, beginning of period	$ 4,923	$ 4,810	$ 4,769	$ 4,149
Additions to allowance for credit losses not previously recorded	374	541	3,539	13,032
Reductions for securities sold during the period	(1,280)	(113)	(5,055)	(1,319)
Reductions for securities with intent to sell	0	0	0	(16,990)
Additions (reductions) on securities with previous allowance	298	(526)	1,062	5,840
Balance, end of period	4,315	4,712	4,315	4,712
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	116	5	11
Additions to allowance for credit losses not previously recorded	0	0	0	329
Reductions for securities sold during the period	0	(92)	(1)	(96)
Reductions for securities with intent to sell	0	0	0	(324)
Additions (reductions) on securities with previous allowance	0	(14)	(4)	90
Balance, end of period	0	10	0	10
U.S. and Foreign Corporate Securities
Debt Securities, Available-for-sale [Line Items]
Balance, beginning of period	4,917	4,694	4,755	4,138
Additions to allowance for credit losses not previously recorded	374	534	3,539	12,696
Reductions for securities sold during the period	(1,280)	(21)	(5,054)	(1,223)
Reductions for securities with intent to sell	0	0	0	(16,666)
Additions (reductions) on securities with previous allowance	296	(512)	1,067	5,750
Balance, end of period	4,307	4,695	4,307	4,695
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	6	0	9	0
Additions to allowance for credit losses not previously recorded	0	7	0	7
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	2	0	(1)	0
Balance, end of period	$ 8	$ 7	$ 8	$ 7