Effect of Derivative Instruments on Consolidated Statements of Income for Derivatives Not Designated as Accounting Hedges (Detail) (Foreign Exchange Contract, Cost of Sales, Not Designated as Hedging Instrument, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Foreign Exchange Contract | Cost of Sales | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Income on Derivatives	$ (264)	$ 765