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Investments (Components Of Net Realized Gains, Excluding OTTI Charges) (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Schedule of Available-for-sale Securities [Line Items]        
HTM fixed maturity securities Gains $ 40,000 $ 0 $ 195,000 $ 9,000
HTM fixed maturity securities Losses (90,000) (200,000) (196,000) (522,000)
Short-term investments Losses 0 0 (2,000) 0
Other investments securities gains 0 0 1,000 0
Total other net realized investment gains 1,856,000 498,000 6,907,000 9,203,000
Total OTTI charges recognized in earnings (2,944,000) (2,543,000) (3,459,000) (3,342,000)
Total net realized gains (losses) (1,088,000) (2,045,000) 3,448,000 5,861,000
Proceeds From Sale Of Available For Sale Securities 55,000,000 22,000,000 150,900,000 145,800,000
Fixed Maturity Securities [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
AFS securities Gains 2,168,000 698,000 2,941,000 3,052,000
AFS securities losses 262,000 5,000 379,000 12,000
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  
Equity Securities [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
AFS securities Gains 0 5,000 4,775,000 6,676,000
AFS securities losses $ 0 $ 0 $ 428,000 $ 0