Restructuring Charges (Schedule Of Components Of Restructuring Charges) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 8,507	$ 5,197
2019 [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs	6,449
Other exit costs	1,597
Total restructuring charges	8,046
2019 [Member] | Americas [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs	4,499
Other exit costs	1,561
Total restructuring charges	6,060
2019 [Member] | Europe [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs	0
Other exit costs	0
Total restructuring charges	0
2019 [Member] | Asia [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs	1,950
Other exit costs	36
Total restructuring charges	1,986
2018 [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		2,815
Other exit costs		1,773
Total restructuring charges	461	4,588
2018 [Member] | Americas [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		2,496
Other exit costs		1,773
Total restructuring charges		4,269
2018 [Member] | Europe [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		45
Other exit costs		0
Total restructuring charges		45
2018 [Member] | Asia [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		274
Other exit costs		0
Total restructuring charges		274
2017 [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs			$ 2,172
Facility lease costs			264
Other exit costs			531
Total restructuring charges	$ 0	$ 369	2,967
2017 [Member] | Americas [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs			1,985
Facility lease costs			264
Other exit costs			531
Total restructuring charges			2,780
2017 [Member] | Asia [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs			187
Facility lease costs			0
Other exit costs			0
Total restructuring charges			$ 187