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Investments (Components Of Net Realized Gains, Excluding OTTI Charges) (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Schedule of Available-for-sale Securities [Line Items]        
HTM fixed income securities Gains $ 0 $ 32,000 $ 3,000 $ 35,000
HTM fixed income securities Losses (4,000) (37,000) (18,000) (86,000)
Other investments Gains 1,000 0 1,000 0
Other Investments Losses 0 (80,000) 0 (940,000)
Total other net realized investment gains 15,231,000 14,111,000 28,370,000 25,124,000
Total OTTI charges recognized in earnings 0 (680,000) (1,382,000) (3,184,000)
Total net realized gains 15,231,000 13,431,000 26,988,000 21,940,000
Proceeds From Sale Of Available For Sale Securities 89,900,000 67,200,000 221,500,000 116,300,000
Realized Gain On The Sale Of Private Equity [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
Total net realized gains       4,700,000
Fixed Income Securities [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
AFS securities Gains 695,000 662,000 1,633,000 2,580,000
AFS securities Losses (29,000) (31,000) (172,000) (330,000)
Equity Securities [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
AFS securities Gains 14,576,000 13,801,000 27,255,000 24,272,000
AFS securities Losses (8,000) (236,000) (332,000) (407,000)
Proceeds Due To Rebalancing Of Equity Securities Portfolio [Member]
        
Schedule of Available-for-sale Securities [Line Items]        
Total net realized gains   $ 13,500,000   $ 19,100,000