Hedging Transactions and Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2017

As of December 31, 2017, the volume of our copper contracts outstanding were:



Volume of Copper Derivatives
January 2018 - March 2018	140 metric tons per month
April 2018 - June 2018	153 metric tons per month
July 2018 - September 2018	153 metric tons per month
October 2018 - December 2018	119 metric tons per month

As of December 31, 2017 the notional values of these foreign currency forward contracts were:



Notional Values of Foreign Currency Derivatives
KRW/USD	₩	4,503,980,000
EUR/CNY	€	1,049,585
JPY/EUR	¥	325,000,000
EUR/USD	€	7,068,140
EUR/HUF	€	563,119
USD/CNY	$	12,828,710

Effects on Statements of Operations and Statements of Comprehensive Income (Loss):



(Dollars in thousands)		The Effect of Derivative Instruments on the Financial Statements for the year ended December 31, 2017			Fair Values of Derivative Instruments as of December 31, 2017
Foreign Exchange Contracts	Location	Gain/(Loss)			Other Assets (Liabilities)
Contracts not designated as hedging instruments	Other income (expense), net	$	(7	)	$	(396	)
Copper Derivative Instruments
Contracts not designated as hedging instruments	Other income (expense), net	$	1,928		$	2,016
Interest Rate Swap Instrument
Contracts designated as hedging instruments	Other comprehensive income (loss)	$	41		$	41



(Dollars in thousands)		The Effect of Derivative Instruments on the Financial Statements for the year ended December 31, 2016			Fair Values of Derivative Instruments as of December 31, 2016
Foreign Exchange Contracts	Location	Gain/(Loss)			Other Assets (Liabilities)
Contracts not designated as hedging instruments	Other income (expense), net	$	(170	)	$	(170	)
Copper Derivative Instruments
Contracts not designated as hedging instruments	Other income (expense), net	$	625		$	1,277