Segment Information, Revenue from External Customers by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue [Abstract]
Revenue	$ 374,313	$ 371,706	$ 743,319	$ 727,227
Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	133,688	130,578	258,513	257,096
Natural Ingredients [Member]
Revenue [Abstract]
Revenue	54,596	58,759	108,623	114,968
Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	120,165	113,784	238,912	216,893
Personal Care [Member]
Revenue [Abstract]
Revenue	40,298	42,116	82,712	86,962
Inks [Member]
Revenue [Abstract]
Revenue		368		851
Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	181,752	182,415	353,724	357,617
Flavors & Extracts [Member] | Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	133,688	130,578	258,513	257,096
Flavors & Extracts [Member] | Natural Ingredients [Member]
Revenue [Abstract]
Revenue	54,596	58,759	108,623	114,968
Flavors & Extracts [Member] | Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	0	0	0	0
Flavors & Extracts [Member] | Personal Care [Member]
Revenue [Abstract]
Revenue	0	0	0	0
Flavors & Extracts [Member] | Inks [Member]
Revenue [Abstract]
Revenue		0		0
Color [Member]
Revenue [Abstract]
Revenue	156,532	152,070	313,481	295,998
Color [Member] | Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	0	0	0	0
Color [Member] | Natural Ingredients [Member]
Revenue [Abstract]
Revenue	0	0	0	0
Color [Member] | Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	120,165	113,784	238,912	216,893
Color [Member] | Personal Care [Member]
Revenue [Abstract]
Revenue	40,298	42,116	82,712	86,962
Color [Member] | Inks [Member]
Revenue [Abstract]
Revenue		368		851
Asia Pacific [Member]
Revenue [Abstract]
Revenue	36,029	37,221	76,114	73,612
Asia Pacific [Member] | Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	0	0	0	0
Asia Pacific [Member] | Natural Ingredients [Member]
Revenue [Abstract]
Revenue	0	0	0	0
Asia Pacific [Member] | Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	0	0	0	0
Asia Pacific [Member] | Personal Care [Member]
Revenue [Abstract]
Revenue	0	0	0	0
Asia Pacific [Member] | Inks [Member]
Revenue [Abstract]
Revenue		0		0
Reportable Segments [Member]
Revenue [Abstract]
Revenue	384,776	382,933	764,874	750,563
Reportable Segments [Member] | Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	188,284	189,337	367,136	372,064
Reportable Segments [Member] | Color [Member]
Revenue [Abstract]
Revenue	160,463	156,268	321,624	304,706
Reportable Segments [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	36,029	37,328	76,114	73,793
Intersegment Revenue [Member]
Revenue [Abstract]
Revenue	10,463	11,227	21,555	23,336
Intersegment Revenue [Member] | Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	6,532	6,922	13,412	14,447
Intersegment Revenue [Member] | Color [Member]
Revenue [Abstract]
Revenue	3,931	4,198	8,143	8,708
Intersegment Revenue [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	$ 0	$ 107	$ 0	$ 181