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Information Related to Recurring Fair Value Measurement of Derivative Financial Instruments in Our Consolidated Balance Sheet (Detail) - Fair Value, Inputs, Level 2 - Designated as Hedging Instrument - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Foreign Currency Derivatives
Derivatives Fair Value [Line Items]
Net Asset/ (Liabilities)	$ (909)
Foreign Currency Derivatives | Current Assets
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	141
Foreign Currency Derivatives | Current Liabilities
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair Value	(1,050)	$ (1,395)
Net Asset/ (Liabilities)		(1,395)
Commodity Derivatives | Current Assets
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	72	18
Net Asset/ (Liabilities)	$ 72	$ 18

X

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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Fair value of asset associated with financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

+ References

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- Definition

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.

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No definition available.

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