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Pension (Schedule Of Net Periodic Pension Costs) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Pension [Abstract]        
Service cost $ 107 $ 83 $ 312 $ 249
Interest cost 96 131 279 394
Expected return on plan assets (280) (269) (834) (809)
Settlement expense 158   356  
Recognized net actuarial loss 283 226 850 678
Total pension expense $ 364 $ 171 $ 963 $ 512