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Financial Instruments - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Derivative [Line Items]    
Net settlement asset $ 2,100,000  
Estimated amount of net foreign currency derivative gains (loss) in other comprehensive income reclassified to earnings (2,300,000)  
Foreign exchange contracts [Member]    
Derivative [Line Items]    
Notional amount of foreign currency derivative hedges 189,600,000  
Cash flow hedge [Member]    
Derivative [Line Items]    
Net gains (losses) recognized in OCI $ (4,600,000) $ 3,900,000