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Derivatives Designated as Hedging Instruments by Classification and Amount of Gains and Losses (Detail) (Designated As Hedging Instrument, Foreign Exchange Forward, USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Designated As Hedging Instrument | Foreign Exchange Forward
       
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of gain (loss) recognized in OCI $ (5,536) $ (872) $ (4,308) $ 7,266
Amount of gain (loss) reclassified from accumulated OCI to statements of operations $ (2,830) $ (326) $ (5,597) $ 803