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Commitments and Contingencies - Additional Information (Detail)
 3 Months Ended
Mar. 31, 2019
USD ($)
Facility
property
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2018
USD ($)
Commitments And Contingencies [Line Items]        
Bank guarantees related to appeals on income tax and indirect tax cases $ 17,900,000      
Available lines of credit $ 107,700,000      
Duration as potentially responsible party, years 20 years      
Number of facilities under potentially responsible party investigation | property 7      
Property, Plant and Equipment, Net $ 1,294,029,000     $ 1,241,152,000
Bank guarantees and pledged assets to pursue defenses related to other contingencies 28,200,000      
Loss contingency accrual for the period 4,800,000      
Product liability   $ 5,000,000    
Settlement of claim   16,000,000 $ 3,000,000  
Product Liability Contingency, Loss Exposure in Excess of Accrual, Amount Paid   $ 13,000,000    
Product Liability Contingency, Loss Exposure in Excess of Accrual, Best Estimate 1,000,000      
Bank guarantees and standby letters of credit        
Commitments And Contingencies [Line Items]        
Bank guarantees and letters of credit outstanding 58,500,000      
Pledged assets        
Commitments And Contingencies [Line Items]        
The amount of pledged assets, principally PP&E to cover income tax and indirect tax assessments 10,300,000      
Reserve for Environmental Costs        
Commitments And Contingencies [Line Items]        
Estimation of possible loss 3,000,000      
Damages from Product Defects        
Commitments And Contingencies [Line Items]        
Additional litigation reserve 17,500,000      
CHINA        
Commitments And Contingencies [Line Items]        
Property, Plant and Equipment, Net $ 199,000,000      
Number of facilities | Facility 5      
Number of facilities under construction | Facility 1      
Guangzhou Flavors Plant | CHINA        
Commitments And Contingencies [Line Items]        
Property, Plant and Equipment, Net $ 66,000,000      
Zhejiang Ingredients Plant        
Commitments And Contingencies [Line Items]        
Gain Contingency, Expected Relocation Payments     50,000,000  
Gain Contingency, Relocation Payments Received 0   $ 15,000,000  
Zhejiang Ingredients Plant | CHINA        
Commitments And Contingencies [Line Items]        
Property, Plant and Equipment, Net 20,000,000      
Minimum        
Commitments And Contingencies [Line Items]        
Estimation of possible loss 0      
Maximum        
Commitments And Contingencies [Line Items]        
Estimation of possible loss 10,000,000      
Amended credit facility | Citibank, N.A.        
Commitments And Contingencies [Line Items]        
Line of credit facility, maximum borrowing capacity $ 912,300,000