Hedging Transactions and Derivative Financial Instruments (Effect and Fair Value of Derivative Instruments) (Detail) - Other income, net - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Foreign Exchange Option Contracts
Derivative [Line Items]
Foreign Exchange Contracts, Not designated as hedging instruments, Amount of gain (loss)	$ (170)	$ (78)
Foreign Exchange Contracts, Not designated as hedging instruments, Other assets (liabilities)	(170)	(78)
Copper Derivative Instruments
Derivative [Line Items]
Copper Derivative Instruments, Not designated as hedging instruments, Amount of gain (loss)	625	(666)
Copper Derivative Instruments, Not designated as hedging instruments, Other assets (liabilities)	$ 1,277	193
Interest Rate Swap Instrument
Derivative [Line Items]
Interest Rate Swap Instrument, Designated as hedging instruments, Amount of gain (loss)		126
Interest Rate Swap Instrument, Designated as hedging instruments, Other assets (liabilities)		$ (18)

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624163-113959

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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Fair value as of the balance sheet date of all foreign currency derivatives not designated as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated 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
-Subparagraph (e)
-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

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Fair value as of the balance sheet date of all interest rate derivatives designated as cash flow hedging instruments.

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