Hedging Transactions and Derivative Financial Instruments (Effect and Fair Value of Derivative Instruments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Contracts designated as hedging instruments, Other comprehensive income (loss), Amount of gain (loss)	$ 197
Designated as Hedging Instrument [Member] | Interest Rate Swap Instrument [Member]
Derivative [Line Items]
Contracts designated as hedging instruments, Other comprehensive income (loss), Amount of gain (loss)	(128)	(269)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Contracts designated as hedging instruments, Other comprehensive income (loss), Amount of gain (loss)	(250)	(7)
Not Designated as Hedging Instrument [Member] | Copper Derivative Instruments [Member]
Derivative [Line Items]
Contracts designated as hedging instruments, Other comprehensive income (loss), Amount of gain (loss)	$ (290)	$ (1,027)