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Hedging Transactions and Derivative Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Notional Amounts of Outstanding Derivative Positions | The copper and foreign currency contracts that were outstanding as of September 30, 2015 are listed below:
Notional Value of Copper Derivatives |  | Notional Values of Foreign Currency Derivatives
October 2015 - December 2015 | 123 | metric tons per month |  | EUR/USD | € | 1,500,000 |
January 2016 - March 2016 | 150 | metric tons per month |  | JPY/USD | ¥ | 150,000,000 |
April 2016 - June 2016 | 130 | metric tons per month |  | HUF/EUR | 50,000,000 |
July 2016 - September 2016 | 115 | metric tons per month |  | JPY/EUR | ¥ | 145,000,000 |
October 2016 - December 2016 | 80 | metric tons per month |  | CNY/USD | ¥ | 92,510,000 |
|  |  | USD/KRW | $ | 5,250,000 |
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance |
(Dollars in thousands) |  |  |  | The Effect of Current Derivative Instruments on the Financial Statements for the period ended September 30, 2015
|  |  |  | Amount of gain (loss)
Foreign Exchange Contracts |  | Location of gain (loss) |  | Quarter ended |  | Nine months ended
Contracts designated as hedging instruments |  | Other comprehensive income (loss) |  | $ | 10 |  |  | $ | (87 | )
Contracts not designated as hedging instruments |  | Other income (expense), net |  | (315 | ) |  | (123 | )
Copper Derivative Instruments |  |  |  |  |  |  |
Contracts not designated as hedging instruments |  | Other income (expense), net |  | (245 | ) |  | (694 | )
Interest Rate Swap Instrument |  |  |  |  |  |
Contracts designated as hedging instruments |  | Other comprehensive income (loss) |  | 36 |  |  | 85 |
(Dollars in thousands) |  |  |  | The Effect of Current Derivative Instruments on the Financial Statements for the period ended September 30, 2014
|  |  |  | Amount of gain (loss)
Foreign Exchange Contracts |  | Location of gain (loss) |  | Quarter ended |  | Nine months ended
Contracts not designated as hedging instruments |  | Other income (expense), net |  | $ | 71 |  |  | $ | (83 | )
Copper Derivative Instruments |  |  |  |  |  |
Contracts not designated as hedging instruments |  | Other income (expense), net |  | (390 | ) |  | (1,053 | )
Interest Rate Swap Instrument |  |  |  |  |  |
Contracts designated as hedging instruments |  | Other comprehensive income (loss) |  | 82 |  |  | 121 |

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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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