Pension And Other Liabilities (Schedule Of Reconciliation Of The Lease Make-Good Provision) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Pension And Other Liabilities [Abstract]
Lease make-good provision, Beginning balance	$ 5,648	$ 5,146
Liabilities incurred during the year
Liabilities settled during the year
Accretion expense	292	282
Effect of changes in foreign currency	(326)	220
Lease make-good provision, Ending balance	$ 5,614	$ 5,648