Hedging Transactions and Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Notional values of outstanding derivative positions

Notional Value of Copper Derivatives
January 2015- March 2015	156 metric tons per month
April 2015 - June 2015	150 metric tons per month
July 2015 - September 2015	135 metric tons per month
October 2015 - December 2015	123 metric tons per month
January 2016 - March 2016	30 metric tons per month

Notional Values of Foreign Currency Derivatives
YEN/USD	¥	200,000,000
KRW/USD	₩	1,854,700,000
YEN/EUR	¥	315,000,000
HUF/EUR	50,000,000
CNY/USD	¥	134,000,000

Gain (loss) on derivative instruments

(Dollars in thousands)	The Effect of Current Derivative Instruments on the Financial Statements for the year ended December 31, 2014				Fair Values of Derivative Instruments as of December 31, 2014
Foreign Exchange Contracts	Location of gain (loss)	Amount of gain (loss)			Other Assets (Liabilities)
Contracts not designated as hedging instruments	Other income, net	$	(19	)	$	(19	)
Copper Derivative Instruments
Contracts not designated as hedging instruments	Other income, net	(605		)	355
Interest Rate Swap Instrument
Contracts designated as hedging instruments	Other comprehensive income (loss)	152			(144		)

(Dollars in thousands)	The Effect of Current Derivative Instruments on the Financial Statements for the year ended December 31, 2013				Fair Values of Derivative Instruments as of December 31, 2013
Foreign Exchange Contracts	Location of gain (loss)	Amount of gain (loss)			Other Assets (Liabilities)
Contracts not designated as hedging instruments	Other income, net	$	(79	)	$	(79	)
Contracts designated as hedging instruments	Other comprehensive income (loss)	(24		)	2
Copper Derivative Instruments
Contracts not designated as hedging instruments	Other income, net	(373		)	984
Interest Rate Swap Instrument
Contracts designated as hedging instruments	Other comprehensive income (loss)	(296		)	(296		)