Restructuring and Other Charges, Net - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Facility	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) Facility Position	Dec. 31, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 1,497	$ 3,716	$ 8,299	$ 22,415
Frutarom Integration Initiative
Restructuring Cost and Reserve [Line Items]
Expected number of sites closed | Facility			35
Number of facilities closed | Facility			6		10
2017 Productivity Program
Restructuring Cost and Reserve [Line Items]
Restructuring Charges						$ 24,500
Employee Severance | Frutarom Integration Initiative
Restructuring Cost and Reserve [Line Items]
Number of facilities closed | Facility			16
Restructuring Charges			$ 18,300
Employee Severance | Frutarom Integration Initiative | Minimum
Restructuring Cost and Reserve [Line Items]
Payments for restructuring			40,000
Employee Severance | Frutarom Integration Initiative | Maximum
Restructuring Cost and Reserve [Line Items]
Payments for restructuring			$ 50,000
Employee Severance | 2019 Severance Initiatives
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					$ 21,700
Number of positions expected to be eliminated | Position					190
Payments for restructuring					$ 25,000
Employee Severance | 2017 Productivity Program
Restructuring Cost and Reserve [Line Items]
Payments for restructuring						$ 25,000
Europe, Africa and Middle East | Frutarom Integration Initiative
Restructuring Cost and Reserve [Line Items]
Number of facilities closed | Facility			3		6
Latin America | Frutarom Integration Initiative
Restructuring Cost and Reserve [Line Items]
Number of facilities closed | Facility			1		2
North America | Frutarom Integration Initiative
Restructuring Cost and Reserve [Line Items]
Number of facilities closed | Facility			2		1