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Investments (Components Of Net Realized Gains, Excluding OTTI Charges) (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Schedule of Available-for-sale Securities [Line Items]        
HTM fixed maturity securities Gains $ 2,000 $ 8,000 $ 155,000 $ 9,000
HTM fixed maturity securities Losses (25,000) (108,000) (106,000) (322,000)
AFS fixed maturity securities Gains 368,000 1,947,000 773,000 2,354,000
AFS fixed maturity securities Losses (74,000) 0 (117,000) (7,000)
AFS equity securities Gains 0 468,000 4,775,000 6,671,000
AFS equity securities Losses 0 0 (428,000) 0
Short-term investments Losses 0 0 (2,000) 0
Other investments securities gains 1,000 0 1,000 0
Total other net realized investment gains 272,000 2,315,000 5,051,000 8,705,000
Total OTTI charges recognized in earnings (94,000) (169,000) (515,000) (799,000)
Total net realized gains (losses) 178,000 2,146,000 4,536,000 7,906,000
Proceeds From Sale Of Available For Sale Securities 24,100,000 52,100,000 95,900,000 123,800,000
Sale of equity securities, available-for-sale     58,176,000 59,663,000
Proceeds Due To Rebalancing Of Equity Securities Portfolio [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
Total net realized gains (losses)     4,300,000  
Sale of equity securities, available-for-sale     $ 57,500,000