Restructuring Charges (Schedule Of Accrued Restructuring Balances) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 0	$ 1,091
Restructuring charges	8,305	1,049
Cash Payment		(1,809)
Non-Cash Activity		344
Foreign Exchange Adjustments		13
Ending Balance		0
2015 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Restructuring charges	8,305
Cash Payment	(5,809)
Non-Cash Activity	1,121
Foreign Exchange Adjustments	(39)
Ending Balance	1,336	0
2014 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance		0
Restructuring charges		879
Cash Payment		(879)
Non-Cash Activity		0
Foreign Exchange Adjustments		0
Ending Balance
2013 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance		953
Restructuring charges		186
Cash Payment		(820)
Non-Cash Activity		344
Foreign Exchange Adjustments		25
Ending Balance
2012 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance		138
Restructuring charges		(16)
Cash Payment		(110)
Non-Cash Activity		0
Foreign Exchange Adjustments		(12)
Ending Balance
Severance [Member] | 2015 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Restructuring charges	2,542
Cash Payment	(2,289)
Non-Cash Activity	0
Foreign Exchange Adjustments	(31)
Ending Balance	222	0
Severance [Member] | 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance		0
Restructuring charges		876
Cash Payment		(876)
Non-Cash Activity		0
Foreign Exchange Adjustments		0
Ending Balance
Severance [Member] | 2013 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance		120
Restructuring charges		87
Cash Payment		(193)
Non-Cash Activity		0
Foreign Exchange Adjustments		(14)
Ending Balance
Severance [Member] | 2012 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance		34
Restructuring charges		45
Cash Payment		(79)
Non-Cash Activity		0
Foreign Exchange Adjustments		0
Ending Balance
Lease Facility Costs [Member] | 2015 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Restructuring charges	2,462
Cash Payment	(1,534)
Non-Cash Activity	0
Foreign Exchange Adjustments	0
Ending Balance	928	0
Other Exit Costs [Member] | 2015 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Restructuring charges	3,301
Cash Payment	(1,986)
Non-Cash Activity	1,121
Foreign Exchange Adjustments	(8)
Ending Balance	$ 186	0
Other Exit Costs [Member] | 2014 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance		0
Restructuring charges		3
Cash Payment		(3)
Non-Cash Activity		0
Foreign Exchange Adjustments		0
Ending Balance
Other Exit Costs [Member] | 2013 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance		833
Restructuring charges		99
Cash Payment		(627)
Non-Cash Activity		344
Foreign Exchange Adjustments		39
Ending Balance
Other Exit Costs [Member] | 2012 [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance		104
Restructuring charges		(61)
Cash Payment		(31)
Non-Cash Activity		0
Foreign Exchange Adjustments		$ (12)
Ending Balance