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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 |

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