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Derivative Instruments - Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Sep. 30, 2016
Derivatives, Fair Value [Line Items]      
Derivative asset, fair value $ 4,084 $ 27,207 $ 9,075
Derivative liability, fair value 29,877 9,212 8,045
Derivatives designated as hedging instruments      
Derivatives, Fair Value [Line Items]      
Derivative asset, fair value 2,715 24,529 8,249
Derivative liability, fair value 28,830 2,140 6,513
Derivatives designated as hedging instruments | Foreign currency forward exchange contracts | Prepaid expenses and other current assets      
Derivatives, Fair Value [Line Items]      
Derivative asset, fair value 1,951 18,747 7,127
Derivatives designated as hedging instruments | Foreign currency forward exchange contracts | Other noncurrent assets      
Derivatives, Fair Value [Line Items]      
Derivative asset, fair value 764 5,782 1,122
Derivatives designated as hedging instruments | Foreign currency forward exchange contracts | Accrued liabilities      
Derivatives, Fair Value [Line Items]      
Derivative liability, fair value 21,624 1,917 5,131
Derivatives designated as hedging instruments | Foreign currency forward exchange contracts | Other noncurrent liabilities      
Derivatives, Fair Value [Line Items]      
Derivative liability, fair value 7,206 223 1,382
Derivatives not designated as hedging instruments      
Derivatives, Fair Value [Line Items]      
Derivative liability, fair value 1,047 7,072 1,532
Derivatives not designated as hedging instruments | Foreign currency forward exchange contracts | Prepaid expenses and other current assets      
Derivatives, Fair Value [Line Items]      
Derivative asset, fair value 1,369 2,678 826
Derivatives not designated as hedging instruments | Foreign currency forward exchange contracts | Accrued liabilities      
Derivatives, Fair Value [Line Items]      
Derivative liability, fair value 1,047 7,072 0
Derivatives not designated as hedging instruments | Cross currency swap contract | Accrued liabilities      
Derivatives, Fair Value [Line Items]      
Derivative liability, fair value $ 0 $ 0 $ 1,532