Hedging Transactions and Derivative Financial Instruments (Effect and Fair Value of Derivative Instruments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Contracts not designated as hedging instruments | Other income (expense), net | Foreign Exchange Contracts
Derivative [Line Items]
Effect of current derivative instruments	$ 0	$ (315)	$ 29	$ (123)
Fair Values of Derivative Instruments	29	(185)	29	(185)
Contracts not designated as hedging instruments | Other income (expense), net | Copper Derivatives
Derivative [Line Items]
Effect of current derivative instruments	(94)	(245)	(163)	(694)
Fair Values of Derivative Instruments	$ 490	383	$ 490	383
Contracts designated as hedging instruments | Other comprehensive income (loss) | Foreign Exchange Contracts
Derivative [Line Items]
Effect of current derivative instruments		10		(87)
Fair Values of Derivative Instruments		106		106
Contracts designated as hedging instruments | Other comprehensive income (loss) | Interest Rate Swap
Derivative [Line Items]
Effect of current derivative instruments		36		85
Fair Values of Derivative Instruments		$ (58)		$ (58)