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Pension (Schedule Of Net Periodic Pension Costs) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Pension [Abstract]          
Service cost $ 82 $ 90 $ 243 $ 270  
Interest cost 157 138 473 414  
Expected return on plan assets (272) (279) (814) (837)  
Recognized net actuarial loss 133 176 419 528  
Total pension expense $ 100 $ 125 $ 321 $ 375 $ 500