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Investments (Components Of Net Realized Gains, Excluding OTTI Charges) (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Schedule of Available-for-sale Securities [Line Items]        
HTM fixed maturity securities Gains $ 3,000 $ 2,000 $ 3,000 $ 155,000
HTM fixed maturity securities Losses (12,000) (25,000) (49,000) (106,000)
Short-term investments Losses 0 0 0 (2,000)
Other investments realized gains 0 1,000 0 1,000
Other Investments Losses 0 0 (860,000) 0
Total other net realized investment gains 5,709,000 272,000 11,013,000 5,051,000
Total OTTI charges recognized in earnings (555,000) (94,000) (2,504,000) (515,000)
Total net realized gains 5,154,000 178,000 8,509,000 4,536,000
Proceeds From Sale Of Available For Sale Securities 42,200,000 24,100,000 49,100,000 95,900,000
Fixed Maturity Securities [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
AFS securities Gains 967,000 368,000 1,918,000 773,000
AFS securities losses (46,000) (74,000) (299,000) (117,000)
Proceeds Due To Rebalancing Of Equity Securities Portfolio [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
Total net realized gains     5,600,000 4,300,000
Realized Gain on Sale of Private Equity Security [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
Total net realized gains 4,700,000      
Equity Securities [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
AFS securities Gains 4,800,000 0 10,471,000 4,775,000
AFS securities losses $ (3,000) $ 0 $ (171,000) $ (428,000)