Investments (Summary Of Changes In Net Unrealized Appreciation (Depreciation) For The Company's Investments) (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
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	$ (41,409)	$ (12,656)	$ 23,288	$ (144,507)
Deferred tax benefit (expense)	14,492	4,430	(8,151)	50,438
Deferred tax benefit (expense), other-than-temporary impairment				140
Change in unrealized appreciation (depreciation), net of deferred taxes, included in stockholder's equity	(26,917)	(8,226)	15,137	(93,929)
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	(41,410)	(12,657)	23,285	(144,110)
Fixed Maturity Securities, Other-Than-Temporary Impairment [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax				(399)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	$ 1	$ 1	$ 3	$ 2