Investments (Summary Of Gross Gains (Losses) From Sales Of Fixed Maturity And Equity Securities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities	$ 222,915	$ 125,516	$ 571,537	$ 483,482
Gross gains from sales	4,408	3,446	10,698	12,123
Gross losses from sales	(3,256)	(1,679)	(11,531)	(7,934)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities	111,684	95,174	404,627	450,020
Gross gains from sales	1,697	3,746	12,019	33,151
Gross losses from sales	$ (4,286)	$ (2,152)	$ (14,223)	$ (7,586)