Operational Improvement Plan (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
		Jun. 30, 2021	Jun. 30, 2021		Dec. 31, 2020
Restructuring Costs [Abstract]
Accrued liabilities		$ 1,600	$ 1,600		$ 2,200
Expected operational improvement cost		1,000	1,000
Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs		(3,494)	(2,493)
Employee Separation Costs [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs		5	(4)
Other Income [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs	[1]	(3,624)	(3,624)
Other Costs [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs		125	1,135	[2]
Flavors & Extracts [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs		3	(16)
Flavors & Extracts [Member] | Employee Separation Costs [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs		3	(16)
Flavors & Extracts [Member] | Other Income [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs	[1]	0	0
Flavors & Extracts [Member] | Other Costs [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs		0	0	[2]
Color [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs		(3,473)	(2,410)
Color [Member] | Employee Separation Costs [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs		26	80
Color [Member] | Other Income [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs	[1]	(3,624)	(3,624)
Color [Member] | Other Costs [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs		125	1,134	[2]
Asia Pacific [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs		(24)	(67)
Asia Pacific [Member] | Employee Separation Costs [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs		(24)	(68)
Asia Pacific [Member] | Other Income [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs	[1]	0	0
Asia Pacific [Member] | Other Costs [Member] | Selling & Administrative Expenses [Member]
Restructuring Costs [Abstract]
Operational Improvement Plan costs		$ 0	$ 1	[2]

[1] Other income includes cash received for the early termination of a lease less associated expenses.

[2] Other costs include professional services, accelerated depreciation, and other related costs.