Investments (Summary Of Changes In Net Unrealized Appreciation (Depreciation) For The Company's Investments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	$ 30,704	$ (121,137)	$ 64,697	$ (131,851)
Deferred tax benefit (expense)	(10,745)	42,292	(22,643)	46,008
Deferred tax benefit (expense), other-than-temporary impairment		106		140
Change in unrealized appreciation (depreciation), net of deferred taxes, included in stockholder's equity	19,959	(78,739)	42,054	(85,703)
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	30,702	(120,835)	64,695	(131,453)
Fixed Maturity Securities, Other-Than-Temporary Impairment [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax		(302)		(399)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	$ 2		$ 2	$ 1