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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2015
Fair Value Disclosures [Abstract] |
Assets Measured at Fair Value on a Recurring Basis, Categorized by the Level of Inputs Used in the Valuation | From time to time we enter into various instruments that require fair value measurement, including foreign currency option contracts, interest rate swaps and copper derivative contracts. Assets and liabilities measured on a recurring basis, categorized by the level of inputs used in the valuation, include:
(Dollars in thousands) |  | Carrying amount as of September 30, 2015 |  | Level 1 |  | Level 2 |  | Level 3
Foreign currency contracts |  | $ | (79 | ) |  | $ | — |  |  | $ | (79 | ) |  | $ | — |
Copper derivative contracts |  | 383 |  |  | — |  |  | 383 |  |  | — |
Interest rate swap |  | (58 | ) |  | — |  |  | (58 | ) |  | — |
(Dollars in thousands) |  | Carrying amount as of December 31, 2014 |  | Level 1 |  | Level 2 |  | Level 3
Foreign currency contracts |  | $ | (18 | ) |  | $ | — |  |  | $ | (18 | ) |  | $ | — |
Copper derivative contracts |  | 355 |  |  | — |  |  | 355 |  |  | — |
Interest rate swap |  | (144 | ) |  | — |  |  | (144 | ) |  | — |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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