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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 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Fair Value [Abstract]        
Interest income $ 275 $ 142 $ 490 $ 166
Interest expense
Change in fair value 516 216 776 274
Total change in fair value $ 791 $ 358 $ 1,266 $ 440