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Restructuring and Other Charges, Net - Changes in Employee-Related Restructuring Liabilities (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Restructuring Reserve [Roll Forward] |  |  |  |
Additional charges, net | $ 2,525 | $ 1,186 | $ 18,699 | $ 1,903
Fragrance Ingredients Rationalization |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning Balance |  |  | 5,200 |
Additional charges, net |  |  | 18,699 |
Payments |  |  | (6,653) |
Ending Balance | 17,246 |  | 17,246 |
Fragrance Ingredients Rationalization | Employee-Related Costs |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning Balance |  |  | 4,125 |
Additional charges, net |  |  | 15,126 |
Payments |  |  | (5,503) |
Ending Balance | 13,748 |  | 13,748 |
Fragrance Ingredients Rationalization | Other |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Beginning Balance |  |  | 1,075 |
Additional charges, net |  |  | 3,573 |
Payments |  |  | (1,150) |
Ending Balance | $ 3,498 |  | $ 3,498 |

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