Fair Value Measurements - Fair Value of Gross Position of Derivative Contracts in Consolidated Balance Sheets (Detail) - Other Current Assets [Member] - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Derivatives Assets/ (liabilities) as hedging instruments	$ (2,599)	$ 3,698
Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivatives Assets/ (liabilities) as hedging instruments	(2,056)	3,524
Designated as Hedging Instruments [Member] | Gross Amounts Recognized [Member]
Derivatives, Fair Value [Line Items]
Derivatives Assets/ (liabilities) as hedging instruments	(2,511)	3,559
Designated as Hedging Instruments [Member] | Gross Amounts Offset [Member]
Derivatives, Fair Value [Line Items]
Derivatives Assets/ (liabilities) as hedging instruments	455	(35)
Not Designated as Hedging Instruments [Member] | Gross Amounts Recognized [Member]
Derivatives, Fair Value [Line Items]
Derivatives Assets/ (liabilities) as hedging instruments	$ (543)	$ 174