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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 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Fair Value [Abstract]        
Interest income $ 14 $ 31 $ 54 $ 84
Interest expense
Change in fair value $ (14) $ (3) $ (11) $ 13
Total change in fair value   $ 28 $ 43 $ 97