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Fair Value (Amount Of Gains And Losses From Changes In Fair Value Included In Earnings) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Fair Value [Abstract]        
Interest income $ 11 $ 7 $ 16 $ 19
Change in fair value (9) 13 (20) 4
Total change in fair value $ 2 $ 20 $ (4) $ 23