Restructuring Charges (Schedule Of Accrued Restructuring) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 1,336
Restructuring charges	1,840
Cash Payment	(2,693)
Foreign Exchange Adjustments	3
Ending Balance	486
2016 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Restructuring charges	1,862
Cash Payment	(1,862)
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	(831)
Foreign Exchange Adjustments	3
Ending Balance	486
Severance [Member] | 2016 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Restructuring charges	1,403
Cash Payment	(1,403)
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	(151)
Foreign Exchange Adjustments	3
Ending Balance	74
Lease Facility Costs [Member] | 2015 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	928
Restructuring charges	0
Cash Payment	(516)
Foreign Exchange Adjustments	0
Ending Balance	412
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