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Fair Value (Amount Of Gains And Losses From Changes In Fair Value Included In Earnings) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Fair Value [Abstract]    
Interest income $ 21 $ 6
Interest expense
Change in fair value (8) 1
Total change in fair value $ 13 $ 7