Fair Value Measurements - Foreign Currency Exchange Contracts Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, Foreign Exchange Contract, USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency derivative instruments-asset position	$ 557	$ 5,011
Foreign currency derivative instruments-liability position	(823)	(1,046)
Foreign Currency Derivatives at Fair Value, Net, Total	(266)	3,965
Observable market based inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign currency derivative instruments-asset position	557	5,011
Foreign currency derivative instruments-liability position	(823)	(1,046)
Foreign Currency Derivatives at Fair Value, Net, Total	$ (266)	$ 3,965