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Investments (Components Of Net Realized Gains, Excluding OTTI Charges) (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Schedule of Available-for-sale Securities [Line Items]        
HTM fixed maturity securities Gains $ 32,000 $ 40,000 $ 35,000 $ 195,000
HTM fixed maturity securities Losses (37,000) (90,000) (86,000) (196,000)
Short-term investments Losses 0 0 0 (2,000)
Other investments realized gains 0 0 0 1,000
Other Investments Losses (80,000) 0 (940,000) 0
Total other net realized investment gains (losses) 14,111,000 1,856,000 25,124,000 6,907,000
Total OTTI charges recognized in earnings (680,000) (2,944,000) (3,184,000) (3,459,000)
Total net realized gains (losses) 13,431,000 (1,088,000) 21,940,000 3,448,000
Proceeds From Sale Of Available For Sale Securities 67,200,000 55,000,000 116,300,000 150,900,000
Fixed Maturity Securities [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
AFS securities Gains 662,000 2,168,000 2,580,000 2,941,000
AFS securities losses (31,000) (262,000) (330,000) (379,000)
Proceeds Due To Rebalancing Of Equity Securities Portfolio [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
Total net realized gains (losses) 13,500,000   19,100,000 4,300,000
Realized Gain on Sale of Private Equity Security [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
Total net realized gains (losses)     4,700,000  
Equity Securities [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
AFS securities Gains 13,801,000 0 24,272,000 4,775,000
AFS securities losses $ (236,000) $ 0 $ (407,000) $ (428,000)