Restructuring Charges (Schedule Of Accrued Restructuring) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 1,336
Restructuring charges	2,456
Cash Payment	(3,770)
Foreign Exchange Adjustments	3
Ending Balance	25
2016 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Restructuring charges	2,478
Cash Payment	(2,478)
Foreign Exchange Adjustments	0
Ending Balance	0
2015 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	1,336
Restructuring Reserve Accrual Adjustment	(22)
Cash Payment	(1,292)
Foreign Exchange Adjustments	3
Ending Balance	25
Severance [Member] | 2016 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Restructuring charges	2,019
Cash Payment	(2,019)
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	0
Cash Payment	(904)
Foreign Exchange Adjustments	0
Ending Balance	24
Other Exit Costs | 2016 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Restructuring charges	459
Cash Payment	(459)
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