Investments (Summary Of Gross Gains (Losses) From Sales Of Fixed Maturity And Equity Securities) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities	$ 414,538	$ 446,699	$ 1,147,824	$ 1,073,938
Gross gains from sales	11,826	12,821	37,525	28,828
Gross losses from sales	(17,061)	(5,428)	(53,312)	(24,138)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities	156,593	150,124	461,812	463,688
Gross gains from sales	5,250	2,545	18,890	13,047
Gross losses from sales	$ (22,469)	$ (4,549)	$ (36,386)	$ (16,155)