Hedging Transactions and Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions

Notional Value of Copper Derivatives			Notional Values of Foreign Currency Derivatives
April 2015 - June 2015	150	metric tons per month	CNY/EUR	¥683,664
July 2015 - September 2015	135	metric tons per month	USD/EUR	$3,000,000
October 2015 - December 2015	123	metric tons per month	EUR/USD	€10,062,000
January 2016 - March 2016	100	metric tons per month	JPY/USD	¥160,000,000
April 2016 - June 2016	50	metric tons per month	HUF/EUR	30,000,000
July 2016 - September 2016	20	metric tons per month	JPY/EUR	¥180,000,000
			CNY/USD	¥141,000,000

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance

(Dollars in thousands)		The Effect of Current Derivative Instruments on the Financial Statements for the quarter ended March 31, 2015
		Amount of gain (loss)
Foreign Exchange Contracts	Location of gain (loss)	Three months ended
Contracts designated as hedging instruments	Other comprehensive income (loss)	$	197
Contracts not designated as hedging instruments	Other income (expense), net	(250		)
Copper Derivative Instruments
Contracts not designated as hedging instruments	Other income (expense), net	(290		)
Interest Rate Swap Instrument
Contracts designated as hedging instruments	Other comprehensive income (loss)	(128		)

(Dollars in thousands)		The Effect of Current Derivative Instruments on the Financial Statements for the quarter ended March 31, 2014
		Amount of gain (loss)
Foreign Exchange Contracts	Location of gain (loss)	Three months ended
Contracts not designated as hedging instruments	Other income (expense), net	$	(7	)
Copper Derivative Instruments
Contracts not designated as hedging instruments	Other income (expense), net	(1,027		)
Interest Rate Swap Instrument
Contracts designated as hedging instruments	Other comprehensive income (loss)	(269		)