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Restructuring and Other Charges - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 5,694 $ 12,258 $ 8,515
Number of employees who accepted the VRIP 83    
Restructuring Charges before Adjustments $ 7,300    
International      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 5,300 7,400 8,000
Americas      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 1,800 3,300 500
Corporate      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 200 $ 1,600 0
Special termination benefits      
Restructuring Cost and Reserve [Line Items]      
Non-cash special termination benefit expense 11,500    
Staff Reductions      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 5,700    
Reduction in headcount 179 216  
Staff Reductions | International      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 5,300 $ 7,400 $ 8,000
Reduction in headcount 75 134  
Staff Reductions | Americas      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 1,800 $ 3,300  
Reduction in headcount 103 70  
Staff Reductions | Corporate      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges   $ 1,600  
Reduction in headcount 1 12