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Derivatives - Summary of Gains (Losses) on Derivatives Designated as Hedging Instruments (Detail) (Forward Exchange Contracts [Member], Cash Flow Hedging [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Forward Exchange Contracts [Member] | Cash Flow Hedging [Member]
     
Derivative Instruments, Gain (Loss) [Line Items]      
Net (loss) gain recognized in OCI $ (48) $ 936 $ 4,311
Net gain (loss) reclassified from accumulated OCI into income $ 1,086 $ (930) $ (4,021)