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Investments (Gross Gains And Losses Realized) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Investments [Abstract]        
Gross realized gains $ 2,722 $ 0 $ 3,978 $ 2,130
Gross realized losses (54) 0 (465) 0
Net investment security gains $ 2,668 $ 0 $ 3,513 $ 2,130