Employee Pension Plans (Summary Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Summary of net periodic benefit cost
Interest cost	$ 647	$ 582	$ 1,940	$ 1,746
Service cost	240	236	720	709
Expected return on plan assets	(973)	(1,015)	(2,919)	(3,045)
Recognized net actuarial losses	639	683	1,916	2,049
Net periodic benefit cost	$ 553	$ 486	$ 1,657	$ 1,459