Segment Information, Revenue from External Customers by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue [Abstract]
Revenue	$ 403,525	$ 374,313	$ 788,195	$ 743,319
Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	134,749	133,688	259,554	258,513
Natural Ingredients [Member]
Revenue [Abstract]
Revenue	74,464	54,596	142,751	108,623
Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	125,327	120,165	242,385	238,912
Personal Care [Member]
Revenue [Abstract]
Revenue	42,373	40,298	85,340	82,712
Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	202,020	181,752	390,042	353,724
Flavors & Extracts [Member] | Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	134,749	133,688	259,554	258,513
Flavors & Extracts [Member] | Natural Ingredients [Member]
Revenue [Abstract]
Revenue	74,464	54,596	142,751	108,623
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
Color [Member]
Revenue [Abstract]
Revenue	162,925	156,532	319,289	313,481
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	125,327	120,165	242,385	238,912
Color [Member] | Personal Care [Member]
Revenue [Abstract]
Revenue	42,373	40,298	85,340	82,712
Asia Pacific [Member]
Revenue [Abstract]
Revenue	38,580	36,029	78,864	76,114
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
Reportable Segments [Member]
Revenue [Abstract]
Revenue	415,493	384,776	808,916	764,874
Reportable Segments [Member] | Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	209,213	188,284	402,305	367,136
Reportable Segments [Member] | Color [Member]
Revenue [Abstract]
Revenue	167,700	160,463	327,725	321,624
Reportable Segments [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	38,580	36,029	78,886	76,114
Intersegment Revenue [Member]
Revenue [Abstract]
Revenue	11,968	10,463	20,721	21,555
Intersegment Revenue [Member] | Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	7,193	6,532	12,263	13,412
Intersegment Revenue [Member] | Color [Member]
Revenue [Abstract]
Revenue	4,775	3,931	8,436	8,143
Intersegment Revenue [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	$ 0	$ 0	$ 22	$ 0