Quarterly report pursuant to Section 13 or 15(d)

Effects of Foreign Currency Forward Contracts Not Designated as Cash Flow Hedges (Detail)

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Effects of Foreign Currency Forward Contracts Not Designated as Cash Flow Hedges (Detail) (Not Designated as Hedging Instrument, Foreign Exchange Forward, USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Not Designated as Hedging Instrument | Foreign Exchange Forward
 
Derivative Instruments, Gain (Loss) [Line Items]  
Gain recognized in other income (expense) $ 20