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Acquisitions - Frutarom Narrative (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Sep. 30, 2019 | Dec. 31, 2018 | Oct. 04, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | $ 5,497,596 |  | $ 5,378,388 |  | $ 1,156,288 | $ 1,000,123
Frutarom Industries Ltd. [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Percentage of voting interest acquired |  |  |  | 100.00% |  |
Identifiable intangible assets |  | $ 2,668,300 |  | $ 2,690,000 |  |
Other assets |  | 412,111 |  | 353,710 |  |
Redeemable noncontrolling interest |  | (102,902) |  | (97,510) |  |
Goodwill | $ 4,346,438 | 4,273,957 | $ 4,224,010 | $ 4,243,079 |  |
Restatement Adjustment [Member] | Frutarom Industries Ltd. [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Inventory |  | 19,000 |  |  |  |
Current assets assumed |  | (7,400) |  |  |  |
Identifiable intangible assets |  | (21,700) |  |  |  |
Other assets |  | 58,401 |  |  |  |
Equity method investment |  | 10,400 |  |  |  |
Earn out payable |  | 1,500 |  |  |  |
Deferred tax liabilities |  | 14,400 |  |  |  |
Uncertain tax position |  | 18,900 |  |  |  |
Environmental remediation liabilities |  | 5,000 |  |  |  |
Redeemable noncontrolling interest |  | (5,392) |  |  |  |
Goodwill |  | $ 30,878 |  |  |  |

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