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Financial Instruments - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Derivative [Line Items]    
Foreign exchange contracts period, minimum 12 months  
Foreign exchange contracts period, maximum 15 months  
Net settlement asset $ 3,700,000  
Estimated amount of net foreign currency derivative gains (loss) in other comprehensive income reclassified to earnings 3,100,000  
Foreign exchange contracts [Member]    
Derivative [Line Items]    
Notional amount of foreign currency derivative hedges 226,700,000  
Cash flow hedge [Member]    
Derivative [Line Items]    
Net gains (losses) recognized in OCI 6,700,000 $ (1,300,000)
Cash flow hedge [Member] | Foreign exchange contracts [Member]    
Derivative [Line Items]    
Estimated amount of net foreign currency derivative gains (loss) in other comprehensive income reclassified to earnings $ 3,100,000