Hedging Transactions and Derivative Financial Instruments (Effect and Fair Value of Derivative Instruments) (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Not Designated as Hedging Instrument \| Other income (expense), net \| Foreign Exchange Contracts
Derivative [Line Items]
Effect of current derivative instruments	$ (333)	$ (7)
Fair values of derivative instruments	522	(396)
Not Designated as Hedging Instrument \| Other income (expense), net \| Copper Derivatives
Derivative [Line Items]
Effect of current derivative instruments	(2,101)	1,928
Fair values of derivative instruments	583	2,016
Designated as Hedging Instrument \| Other comprehensive income (loss) \| Interest Rate Swap
Derivative [Line Items]
Effect of current derivative instruments	420	41
Fair values of derivative instruments	$ 461	$ 41

Fair value of the assets less the liabilities of a derivative or group of derivatives.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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