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Segment Information - Capital Expenditure and Depreciation and Amortization by Segment (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |
Capital Expenditures | $ 235,978 | $ 170,094 | $ 128,973
Depreciation and amortization | 323,330 | 173,792 | 117,967
Operating Segments [Member] | Flavors [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital Expenditures | 80,267 | 70,028 | 68,937
Depreciation and amortization | 56,674 | 54,534 | 53,534
Operating Segments [Member] | Fragrances [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital Expenditures | 92,077 | 82,206 | 53,089
Depreciation and amortization | 65,386 | 64,018 | 59,951
Operating Segments [Member] | Frutarom Industries Ltd. [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital Expenditures | 55,356 | 12,878 |
Depreciation and amortization | 194,956 | 47,738 |
Unallocated assets [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital Expenditures | 8,278 | 4,982 | 6,947
Depreciation and amortization | $ 6,314 | $ 7,502 | $ 4,482

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