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Hedging Transactions and Derivative Financial Instruments (Tables) | 6 Months Ended
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Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Notional Amounts of Outstanding Derivative Positions | The notional values of our copper contracts outstanding as of June 30, 2017 were:
Volume of Copper Derivatives
July 2017 - September 2017 | 122 | metric tons per month
October 2017 - December 2017 | 122 | metric tons per month
January 2018 - March 2018 | 140 | metric tons per month
April 2018 - June 2018 | 98 | metric tons per month
July 2018 - September 2018 | 46 | metric tons per month
As of June 30, 2017 the notional values of these foreign currency forward contracts were:
Notional Values of Foreign Currency Derivatives
KRW/USD |  | ₩ | 5,695,550,000 |
JPY/EUR |  | ¥ | 266,000,000 |
EUR/USD |  | € | 4,373,956 |
EUR/HUF |  | € | 581,180 |
USD/CNY |  | $ | 6,083,500 |
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance | Effects on Statements of Operations and of Comprehensive Income (Loss):
(Dollars in thousands) |  |  |  | The Effect of Current Derivative Instruments on the Financial Statements for the period ended June 30, 2017 |  | Fair Values of Derivative Instruments as of June 30, 2017
|  |  |  | Gain (Loss) |  | Other Assets (Liabilities)
Foreign Exchange Contracts |  | Location |  | Quarter Ended |  | Six Months Ended |  |
Contracts not designated as hedging instruments |  | Other income (expense), net |  | $ | (312 | ) |  | $ | (291 | ) |  | $ | (312 | )
Copper Derivatives |  |  |  |  |  |  |  |  |
Contracts not designated as hedging instruments |  | Other income (expense), net |  | $ | 71 |  |  | $ | 205 |  |  | $ | 1,331 |
Interest Rate Swap |  |  |  |  |  |  |  |
Contract designated as hedging instrument |  | Other comprehensive income (loss) |  | $ | (335 | ) |  | $ | (515 | ) |  | $ | (622 | )
(Dollars in thousands) |  |  |  | The Effect of Current Derivative Instruments on the Financial Statements for the period ended June 30, 2016 |  | Fair Values of Derivative Instruments as of June 30, 2016
|  |  |  | Gain (Loss) |  | Other Assets (Liabilities)
Foreign Exchange Contracts |  | Location |  | Quarter Ended |  | Six Months Ended |  |
Contracts not designated as hedging instruments |  | Other income (expense), net |  | $ | 943 |  |  | $ | 908 |  |  | $ | 908 |
Copper Derivatives |  |  |  |  |  |  |  |
Contracts not designated as hedging instruments |  | Other income (expense), net |  | $ | (79 | ) |  | $ | (103 | ) |  | $ | 315 |

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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=64837297&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=64837297&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=64837297&loc=SL5579245-113959 + Details
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