Information Related to Recurring Fair Value Measurement of Derivative Instruments in Our Consolidated Condensed Balance Sheet (Detail) - Fair Value, Inputs, Level 2 - Designated as Hedging Instrument - Current Assets $ in Thousands	Sep. 30, 2017 USD ($)
Foreign Currency Derivatives
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 1,340
Net Asset	1,340
Commodity Derivatives
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	202
Net Asset	$ 202