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Restructuring Charges (Schedule Of Components Of Restructuring Charges) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]      
Total restructuring charges $ 12,900 $ 8,507  
2020 [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 8,171    
Lease facility costs 165    
Other exit costs 733    
Total restructuring charges 9,069    
2019 [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs   6,449  
Other exit costs   1,597  
Total restructuring charges 3,831 8,046  
2018 [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs     $ 2,815
Other exit costs     1,773
Total restructuring charges   461 4,588
Americas [Member] | 2020 [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 6,977    
Lease facility costs 165    
Other exit costs 733    
Total restructuring charges 7,875    
Americas [Member] | 2019 [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs   4,499  
Other exit costs   1,561  
Total restructuring charges   6,060  
Americas [Member] | 2018 [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs     2,496
Other exit costs     1,773
Total restructuring charges     4,269
Asia [Member] | 2020 [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 1,181    
Total restructuring charges 1,181    
Asia [Member] | 2019 [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs   1,950  
Other exit costs   36  
Total restructuring charges   $ 1,986  
Asia [Member] | 2018 [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs     274
Total restructuring charges     274
Europe [Member] | 2020 [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 13    
Total restructuring charges $ 13    
Europe [Member] | 2018 [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs     45
Total restructuring charges     $ 45