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Investments (Components Of Net Realized Gains, Excluding OTTI Charges) (Details) (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Schedule of Available-for-sale Securities [Line Items]    
HTM fixed maturity securities Gains $ 0 $ 153,000
HTM fixed maturity securities Losses (37,000) (81,000)
Short-term investments Losses 0 (2,000)
Other Investments Losses (860,000) 0
Total other net realized investment gains 5,304,000 4,779,000
Total OTTI charges recognized in earnings (1,949,000) (421,000)
Total net realized gains 3,355,000 4,358,000
Proceeds From Sale Of Available For Sale Securities 6,900,000 71,800,000
Unsettled proceeds from sale of securities 35,600,000  
Fixed Maturity Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
AFS securities Gains 951,000 405,000
AFS securities losses (253,000) (43,000)
Proceeds Due To Rebalancing Of Equity Securities Portfolio [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Total net realized gains 5,500,000 4,300,000
Equity Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
AFS securities Gains 5,671,000 4,775,000
AFS securities losses $ (168,000) $ (428,000)