Employee Pension Plans (Summary Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Summary of net periodic benefit cost
Interest cost	$ 969	$ 646
Service cost	255	240
Expected return on plan assets	(978)	(973)
Recognized net actuarial losses	413	639
Net periodic benefit cost	$ 659	$ 552