Pension (Schedule Of Net Periodic Pension Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Pension [Abstract]
Service cost	$ 107	$ 83	$ 205	$ 166
Interest cost	96	131	183	262
Expected return on plan assets	(280)	(269)	(554)	(539)
Settlement expense	90		198
Recognized net actuarial loss	283	226	568	452
Total pension expense	$ 296	$ 171	$ 600	$ 341