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Derivative Financial Instruments (Schedule Of Contracts Designated As Hedged Instruments) (Details)
€ in Thousands, £ in Thousands, SFr in Thousands, CAD in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2015
CHF (SFr)
Dec. 31, 2014
CHF (SFr)
Sep. 30, 2015
EUR (€)
Sep. 30, 2015
CAD
Sep. 30, 2015
GBP (£)
Dec. 31, 2014
EUR (€)
Dec. 31, 2014
CAD
Dec. 31, 2014
GBP (£)
Canadian Dollars [Member]                
Foreign Exchange Contracts [Line Items]                
Foreign exchange contracts, Notional Amount | CAD       CAD 5,858     CAD 12,053  
Derivative, Maturity Date Feb. 01, 2016 Feb. 01, 2016            
British Pounds [Member]                
Foreign Exchange Contracts [Line Items]                
Foreign exchange contracts, Notional Amount         £ 1,180     £ 2,739
Derivative, Maturity Date Feb. 01, 2016 Feb. 01, 2016            
Euros [Member]                
Foreign Exchange Contracts [Line Items]                
Foreign exchange contracts, Notional Amount | €     € 18,866     € 36,673    
Derivative, Maturity Date Feb. 01, 2016 Feb. 01, 2016            
Swiss Francs [Member]                
Foreign Exchange Contracts [Line Items]                
Foreign exchange contracts, Notional Amount | SFr SFr 12,724 SFr 31,344            
Derivative, Maturity Date Feb. 01, 2016 Feb. 01, 2016