Hedging Transactions and Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Notional values of outstanding derivative positions

As of December 31, 2016, the notional values of our copper contracts outstanding were:

Notional Value of Copper Derivatives
January 2017 - March 2017	122 metric tons per month
April 2017 - June 2017	122 metric tons per month
July 2017 - September 2017	122 metric tons per month
October 2017 - December 2017	122 metric tons per month

As of December 31, 2016 the notional values of these foreign currency forward contracts were:

Notional Values of Foreign Currency Derivatives
USD/KRW	₩	10,537,789,000
EUR/JPY	¥	309,000,000
EUR/HUF	Ft	169,000,000

Gain (loss) on derivative instruments

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

(Dollars in thousands)		The Effect of Current 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

(Dollars in thousands)		The Effect of Current Derivative Instruments on the Financial Statements for the year ended December 31, 2015			Fair Values of Derivative Instruments as of December 31, 2015
Foreign Exchange Contracts	Location	Gain/(Loss)			Other Assets (Liabilities)
Contracts not designated as hedging instruments	Other income (expense), net	$	(78	)	$	(78	)
Copper Derivative Instruments
Contracts not designated as hedging instruments	Other income (expense), net	$	(666	)	$	193
Interest Rate Swap Instrument
Contracts designated as hedging instruments	Other income (expense), net	$	126		$	(18	)