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Hedging Transactions and Derivative Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Notional values of outstanding derivative positions |
Notional Value of Copper Derivatives
January 2016- March 2016 | 150 metric tons per month
April 2016 - June 2016 | 130 metric tons per month
July 2016 - September 2016 | 127 metric tons per month
October 2016 - December 2016 | 117 metric tons per month
January 2017 - March 2017 | 16 metric tons per month
Notional Values of Foreign Currency Derivatives
YEN/USD | ¥ | 155,000,000 |
USD/KRW | ₩ | 7,580,028,000 |
CNY/EUR | ¥ | 14,000,000 |
EUR/GBP | € | 408,291 |
CNY/USD | ¥ | 45,000,000 |
USD/EUR | $ | 400,000 |
YEN/EUR | ¥ | 160,000,000 |
EUR/CNH | € | 363,029 |
Gain (loss) on derivative instruments |
(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 of gain (loss) |  | Amount of 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 comprehensive income (loss) |  | 126 |  |  | (18 | )
(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 (expense), net |  | $ | (18 | ) |  | $ | (18 | )
Copper Derivative Instruments |  |  |  |  |  |  |  |
Contracts not designated as hedging instruments |  | Other income (expense), net |  | (605 | ) |  | 355 |
Interest Rate Swap Instrument |  |  |  |  |  |  |  |
Contracts designated as hedging instruments |  | Other comprehensive income (loss) |  | 152 |  |  | (144 | )

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959 + Details
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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959 + Details
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