Restructuring And Optimization Programs (Summary Of Accruals Related To Restructuring And Cost Reduction Programs) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 3,520
Restructuring charges	7,874
Cash payments	(3,520)
Non-cash items	(3,625)
Ending balance	4,249
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	2,286
Restructuring charges	3,432
Cash payments	(3,237)
Non-cash items	(91)
Ending balance	2,390
Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	1,234
Restructuring charges	4,442
Cash payments	(283)
Non-cash items	(3,534)
Ending balance	$ 1,859