Restructuring Charges (Schedule Of Accrued Restructuring) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 1,336
Restructuring charges	2,976
Cash Payment	(4,290)
Foreign Exchange Adjustments	3
Ending Balance	25
2016 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Restructuring charges	2,876
Cash Payment	(2,876)
Foreign Exchange Adjustments	0
Ending Balance	0
2015 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	1,336
Restructuring charges	100
Cash Payment	(1,414)
Foreign Exchange Adjustments	3
Ending Balance	25
Severance [Member] | 2016 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Restructuring charges	2,406
Cash Payment	(2,406)
Foreign Exchange Adjustments	0
Ending Balance	0
Severance [Member] | 2015 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	222
Restructuring charges	0
Cash Payment	(224)
Foreign Exchange Adjustments	3
Ending Balance	1
Lease Facility Costs [Member] | 2015 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	928
Restructuring charges	122
Cash Payment	(1,026)
Foreign Exchange Adjustments	0
Ending Balance	24
Other Exit Costs | 2016 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Restructuring charges	470
Cash Payment	(470)
Foreign Exchange Adjustments	0
Ending Balance	0
Other Exit Costs | 2015 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	186
Restructuring Reserve Accrual Adjustment	(22)
Cash Payment	(164)
Foreign Exchange Adjustments	0
Ending Balance	$ 0