Hedging Transactions and Derivative Financial Instruments (Effect and Fair Value of Derivative Instruments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Foreign Exchange Contract [Member]
Derivative [Line Items]
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments	$ 28	$ 28	$ 224	$ 109
Copper Derivative Instruments [Member]
Derivative [Line Items]
Copper Derivative instruments designated as hedging instruments, amount of gain (loss)		(191)		(2)
Copper Derivative Instruments not designated as hedging instruments, amount of gain (loss)	(33)	5	(378)	5
Interest Rate Swap Instrument [Member]
Derivative [Line Items]
Interest rate swap instrument designated as hedging instruments, amount of gain (loss)	$ (82)	$ (355)	$ 30	$ (355)