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Investments In Securities (Schedule Of Fixed Maturity Securities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]    
Due in one year or less, Amortized Cost $ 10,708  
Due after one year through five years, Amortized Cost 35,318  
Due five years through ten years, Amortized Cost 41,648  
Due after ten years, Amortized Cost 3,662  
Total, Amortized Cost 91,336  
Due in one year or less, Fair Value 10,677  
Due after one year through five years, Fair Value 35,920  
Due five years through ten years, Fair Value 41,217  
Due after ten years, Fair Value 4,013  
Total, Fair Value $ 91,827 $ 103,341