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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2019
Income Taxes [Line Items] |  |  |  |
Global Intangible Low-Taxed Income Expense | $ 100 |  |  |
U.S. federal tax rate | 21.00% | 21.00% | 35.00% |
Deferred tax assets realized | $ 75,900 |  |  |
Tax reform, benefit recorded | 9,700 |  |  |
Valuation allowance | 203,765 | $ 200,280 |  |
Operating loss carryforwards | 220,156 | 225,152 |  |
Deferred tax asset | 226,400 |  |  |
Valuation allowance for net operating loss carryforwards | 190,600 |  |  |
Reduction in accrual for interest and penalties | 11,000 | 1,100 | $ 3,000 |
Accrued interest and penalties | 14,000 | 3,000 | 2,800 |
Unrecognized tax benefits, including interest | 88,800 |  |  |
Tax benefits credited to Shareholders' equity |  | 100 | 100 |
Tax Credit Carryforward, Valuation Allowance | 14,100 |  |  |
Deferred Tax Liabilities, Deemed Repatriation | 46,066 | 88,759 |  |
Other liabilities [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Unrecognized tax benefits that would impact effective tax rate | 73,600 | 47,300 | 28,500 |
Other Current Liabilities [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Unrecognized tax benefits that would impact effective tax rate | 1,200 | 3,600 | $ 9,700 |
2018 to 2037 [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating loss carryforwards | 207,900 | 209,400 |  |
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration |  | 12,300 |  |
Tax credit carryforwards | 18,500 | $ 17,800 |  |
Indefinite [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating loss carryforwards | 195,600 |  |  |
Other Liabilities [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Accrued interest and penalties | 1,300 |  |  |
State and Local Jurisdiction [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Valuation allowance | 13,500 |  |  |
Frutarom Industries Ltd. [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Unrecognized tax benefits that would impact effective tax rate |  |  |  | $ 13,800
Accrued interest and penalties | 7,800 |  |  | 6,600
Unrecognized tax benefits, including interest | 33,700 |  |  | $ 20,400
Deferred tax liability adjustment | 43,700 |  |  |
Frutarom Industries Ltd. [Member] | Other liabilities [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Unrecognized tax benefits that would impact effective tax rate | 24,700 |  |  |
Frutarom Industries Ltd. [Member] | Other Current Liabilities [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Unrecognized tax benefits that would impact effective tax rate | $ 1,200 |  |  |

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