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Financial Instruments and Fair Value Measurements (Schedule of Derivative Instruments in Statement of Financial Position, Fair Value) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
lb
Dec. 31, 2013
lb
Forward Currency Contracts [Member] | Not Designated as Hedging Instrument [Member]
    
Derivatives, Fair Value [Line Items]    
Notional amounts $ 13,526 [1] $ 13,335 [1]
Forward Currency Contracts [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
    
Derivatives, Fair Value [Line Items]    
Notional amounts 33,750 [1] 45,000 [1]
Copper Commodity [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
    
Derivatives, Fair Value [Line Items]    
Fixed price commodity contracts (in pounds) 1,146,000 [1] 1,582,000 [1]
Interest Rate Swap [Member] | Fair Value Hedging [Member] | Designated as Hedging Instrument [Member]
    
Derivatives, Fair Value [Line Items]    
Notional amounts 45,000 [1] 45,000 [1]
Other Assets [Member] | Forward Currency Contracts [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
    
Derivatives, Fair Value [Line Items]    
Cash flow hedges , other derivatives 36  
Other Assets [Member] | Copper Commodity [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
    
Derivatives, Fair Value [Line Items]    
Cash flow hedges , other derivatives   152
Other Assets [Member] | Interest Rate Swap [Member] | Fair Value Hedging [Member] | Designated as Hedging Instrument [Member]
    
Derivatives, Fair Value [Line Items]    
Fair value hedge, other derivatives 937 793
Other Liabilities [Member] | Forward Currency Contracts [Member] | Not Designated as Hedging Instrument [Member]
    
Derivatives, Fair Value [Line Items]    
Fair value of other derivatives (16) (18)
Other Liabilities [Member] | Forward Currency Contracts [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
    
Derivatives, Fair Value [Line Items]    
Cash flow hedges , other derivatives   (263)
Other Liabilities [Member] | Copper Commodity [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
    
Derivatives, Fair Value [Line Items]    
Cash flow hedges , other derivatives $ (290)  
[1] Notional amounts represent the gross contract / notional amount of the derivatives outstanding. The fixed price commodity contract notional amounts are in pounds.