Investments (Gross Gains And Losses Realized On Sales Of Investments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments [Abstract]
Fixed maturity securities, Realized Gain	$ 2,306	$ 1,884	$ 2,413
Fixed maturity securities, Realized Loss	(6,690)	(4,296)	(1,066)
Fixed maturity securities, Realized Gain (Loss)	(4,384)	(2,412)	1,347
Equity securities, Realized Gain	64,061	75,591	47,411
Equity securities, Realized Loss	(18,826)	(80,134)	(28,089)
Equity securities, Realized Gain (Loss)	45,235	(4,543)	19,322
Short-term investments, Realized Gain	236	146	177
Short-term investments, Gross Realized Losses	(381)	(2,438)	(2,133)
Short-term investments, Realized Gain (Loss)	$ (145)	$ (2,292)	$ (1,956)