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Pension (Schedule Of Net Periodic Pension Costs) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Pension [Abstract]    
Service cost $ 99 $ 83
Interest cost 87 131
Expected return on plan assets (274) (269)
Settlement expense 108  
Recognized net actuarial loss 285 226
Total pension expense $ 305 $ 171