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Restructuring (Accrued Liabilities Associated With The Relocation And Restructuring Programs) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]  
Beginning Balance $ 960
Costs Accrued 11,547
Payments 11,717
Ending Balance 790
Due within 12 months 790
One-Time Termination Benefits To Employees - 2010 And 2009 Restructuring And Relocation Programs [Member]
 
Restructuring Cost and Reserve [Line Items]  
Beginning Balance 960
Costs Accrued 616
Payments 1,568
Ending Balance 8
Due within 12 months 8
One-Time Termination Benefits To Employees - 2011 Restructuring Program [Member]
 
Restructuring Cost and Reserve [Line Items]  
Costs Accrued 10,931
Payments 10,149
Ending Balance 782
Due within 12 months $ 782