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Restructuring Charges (Schedule Of Accrued Restructuring Balances) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Restructuring Cost and Reserve [Line Items]  
Balance as of December 31, 2011 $ 2,309
Restructuring Charges (36)
Cash Payment (1,119)
Foreign Exchange Adjustments 28
Balance as of March 31, 2012 1,182
2012 [Member]
  
Restructuring Cost and Reserve [Line Items]  
Restructuring Charges 405
Cash Payment (50)
Balance as of March 31, 2012 355
2011 [Member]
  
Restructuring Cost and Reserve [Line Items]  
Balance as of December 31, 2011 1,853
Restructuring Charges (509)
Cash Payment (801)
Foreign Exchange Adjustments 27
Balance as of March 31, 2012 570
2010 [Member]
  
Restructuring Cost and Reserve [Line Items]  
Balance as of December 31, 2011 54
Restructuring Charges 68
Cash Payment (102)
Foreign Exchange Adjustments 1
Balance as of March 31, 2012 21
2009 [Member]
  
Restructuring Cost and Reserve [Line Items]  
Balance as of December 31, 2011 402
Cash Payment (166)
Balance as of March 31, 2012 236
Severance [Member] | 2012 [Member]
  
Restructuring Cost and Reserve [Line Items]  
Restructuring Charges 217
Cash Payment (50)
Balance as of March 31, 2012 167
Severance [Member] | 2011 [Member]
  
Restructuring Cost and Reserve [Line Items]  
Balance as of December 31, 2011 189
Restructuring Charges (74)
Cash Payment (561)
Foreign Exchange Adjustments (11)
Balance as of March 31, 2012 (457)
Severance [Member] | 2010 [Member]
  
Restructuring Cost and Reserve [Line Items]  
Balance as of December 31, 2011 34
Cash Payment (30)
Balance as of March 31, 2012 4
Lease Facility Costs [Member] | 2012 [Member]
  
Restructuring Cost and Reserve [Line Items]  
Restructuring Charges 188
Balance as of March 31, 2012 188
Lease Facility Costs [Member] | 2011 [Member]
  
Restructuring Cost and Reserve [Line Items]  
Balance as of December 31, 2011 1,664
Restructuring Charges (452)
Cash Payment (223)
Foreign Exchange Adjustments 38
Balance as of March 31, 2012 1,027
Lease Facility Costs [Member] | 2009 [Member]
  
Restructuring Cost and Reserve [Line Items]  
Balance as of December 31, 2011 402
Cash Payment (166)
Balance as of March 31, 2012 236
Other Exit Costs [Member] | 2011 [Member]
  
Restructuring Cost and Reserve [Line Items]  
Restructuring Charges 17
Cash Payment (17)
Other Exit Costs [Member] | 2010 [Member]
  
Restructuring Cost and Reserve [Line Items]  
Balance as of December 31, 2011 20
Restructuring Charges 68
Cash Payment (72)
Foreign Exchange Adjustments 1
Balance as of March 31, 2012 $ 17