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Derivative Assets and Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2013
Derivatives, Fair Value [Line Items]      
Derivative asset, fair value $ 7,802 $ 2,310 $ 7,389
Derivative liability, fair value 10,402 14,613 5,078
Designated As Hedging Instrument
      
Derivatives, Fair Value [Line Items]      
Derivative asset, fair value 3,479 415 7,389
Derivative liability, fair value 10,103 12,902 2,436
Designated As Hedging Instrument | Foreign Exchange Forward | Prepaid expenses and other current assets
      
Derivatives, Fair Value [Line Items]      
Derivative asset, fair value 2,938 415 7,389
Designated As Hedging Instrument | Foreign Exchange Forward | Other noncurrent assets
      
Derivatives, Fair Value [Line Items]      
Derivative asset, fair value 541    
Designated As Hedging Instrument | Foreign Exchange Forward | Accrued liabilities
      
Derivatives, Fair Value [Line Items]      
Derivative liability, fair value 10,028 12,432 2,436
Designated As Hedging Instrument | Foreign Exchange Forward | Other noncurrent liabilities
      
Derivatives, Fair Value [Line Items]      
Derivative liability, fair value 75 470  
Not Designated As Hedging Instrument | Foreign Exchange Forward | Prepaid expenses and other current assets
      
Derivatives, Fair Value [Line Items]      
Derivative asset, fair value 4,323 1,895  
Not Designated As Hedging Instrument | Foreign Exchange Forward | Accrued liabilities
      
Derivatives, Fair Value [Line Items]      
Derivative liability, fair value $ 299 $ 1,711 $ 2,642