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, 2018	Dec. 31, 2017
Foreign Currency Derivatives
Derivatives Fair Value [Line Items]
Net Asset/ (Liabilities)	$ 92	$ (909)
Foreign Currency Derivatives | Current Assets
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 92	141
Foreign Currency Derivatives | Current Liabilities
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair Value		1,050
Commodity Derivatives | Current Assets
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value		72
Net Asset/ (Liabilities)		$ 72