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	$ 130,284	$ 222,915	$ 420,108	$ 571,537
Gross gains from sales	1,401	4,408	9,039	10,698
Gross losses from sales	(8,054)	(3,256)	(39,376)	(11,531)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities	138,799	111,684	442,292	404,627
Gross gains from sales	5,241	1,697	17,655	12,019
Gross losses from sales	$ (18,896)	$ (4,286)	$ (31,664)	$ (14,223)