Investments (Summary Of Other-Than-Temporary Impairment Losses Recognized) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporary impairment losses recognized in net income loss	$ (9,984)	$ 0	$ (14,859)	$ (6,264)
Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporary impairment losses recognized in net income loss	(1,473)	0	(6,348)	(1,185)
Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporary impairment losses recognized in net income loss	(1,473)	0	(6,348)	(1,185)
Insurance Companies, Banks And Trusts [Member]
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporary impairment losses recognized in net income loss	(4,048)	0	(4,048)	(2,872)
Industrial, Consumer And All Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporary impairment losses recognized in net income loss	(4,463)	0	(4,463)	(965)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporary impairment losses recognized in net income loss	(8,511)	0	(8,511)	(3,837)
Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporary impairment losses recognized in net income loss			$ 0	$ (1,242)

The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.