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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, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Fair Value [Abstract]        
Interest income $ 486 $ 285 $ 976 $ 451
Interest expense
Change in fair value 204 (208) 980 66
Total change in fair value $ 690 $ 77 $ 1,956 $ 517