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, 2016	Dec. 31, 2015
Foreign Currency Derivatives | Current Liabilities
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair value	$ (1,395)
Net Asset/ (Liabilities)	(1,395)
Commodity Derivatives | Current Liabilities
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair value		$ (725)
Net Asset/ (Liabilities)		$ (725)
Commodity Derivatives | Current Assets
Derivatives Fair Value [Line Items]
Net Asset/ (Liabilities)	18
Asset Derivatives, Fair Value	$ 18