Investments (Gross Gains And Losses Realized On Sales Of Investments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investments [Abstract]
Fixed maturity securities, Realized Gain	$ 863	$ 2,306	$ 1,884
Fixed maturity securities, Realized Loss	(71,425)	(6,690)	(4,296)
Fixed maturity securities, Realized Gain (Loss)	(70,562)	(4,384)	(2,412)
Equity securities, Realized Gain	86,168	64,061	75,591
Equity securities, Realized Loss	(61,252)	(18,826)	(80,134)
Equity securities, Realized Gain (Loss)	24,916	45,235	(4,543)
Short-term investments, Realized Gain	8	236	146
Short-term investments, Gross Realized Losses	(2,500)	(381)	(2,438)
Short-term investments, Realized Gain (Loss)	$ (2,492)	$ (145)	$ (2,292)