Commitments and Contingencies - Additional Information (Detail)	3 Months Ended				6 Months Ended
	Jun. 30, 2019 USD ($) Facility	Sep. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 30, 2019 USD ($) Facility property	Dec. 31, 2018 USD ($)
Commitments And Contingencies [Line Items]
Bank guarantees related to appeals on income tax and indirect tax cases					$ 17,700,000
Available lines of credit	$ 107,600,000				$ 107,600,000
Duration as potentially responsible party, years					20 years
Number of facilities under potentially responsible party investigation | property					7
Property, Plant and Equipment, Net	1,316,305,000				$ 1,316,305,000	$ 1,241,152,000
Bank guarantees and pledged assets to pursue defenses related to other contingencies					27,800,000
Loss contingency accrual for the period	4,800,000
Product liability			$ 5,000,000.0
Settlement of claim			16,000,000.0	$ 3,000,000.0
Product Liability Contingency, Loss Exposure in Excess of Accrual, Amount Paid			$ 13,000,000.0
Reimbursement to supplier		$ 13,100,000
Bank guarantees and standby letters of credit
Commitments And Contingencies [Line Items]
Bank guarantees and letters of credit outstanding					58,700,000
Pledged assets
Commitments And Contingencies [Line Items]
The amount of pledged assets, principally PP&E to cover income tax and indirect tax assessments					10,100,000
Reserve for Environmental Costs
Commitments And Contingencies [Line Items]
Estimation of possible loss	3,000,000				3,000,000
Damages from Product Defects
Commitments And Contingencies [Line Items]
Additional litigation reserve	17,500,000				17,500,000
CHINA
Commitments And Contingencies [Line Items]
Property, Plant and Equipment, Net	$ 200,000,000				$ 200,000,000
Number of facilities | Facility	8				8
Guangzhou Flavors Plant | CHINA
Commitments And Contingencies [Line Items]
Property, Plant and Equipment, Net	$ 64,000,000				$ 64,000,000
Guangzhou Fragrance Plant | CHINA
Commitments And Contingencies [Line Items]
Property, Plant and Equipment, Net	9,000,000				9,000,000
Zhejiang Ingredients Plant
Commitments And Contingencies [Line Items]
Gain Contingency, Expected Relocation Payments				50,000,000
Gain Contingency, Relocation Payments Received				$ 15,000,000	0
Zhejiang Ingredients Plant | CHINA
Commitments And Contingencies [Line Items]
Property, Plant and Equipment, Net	19,000,000				19,000,000
Minimum
Commitments And Contingencies [Line Items]
Estimation of possible loss	0				0
Maximum
Commitments And Contingencies [Line Items]
Estimation of possible loss	10,000,000				10,000,000
Amended credit facility | Citibank, N.A.
Commitments And Contingencies [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,000,000,000.0				$ 1,000,000,000.0