Segment Information, Revenue from External Customers by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue [Abstract]
Revenue	$ 392,613	$ 363,829	$ 1,180,808	$ 1,107,148
Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	128,990	124,697	388,544	383,210
Natural Ingredients [Member]
Revenue [Abstract]
Revenue	74,289	66,300	217,040	174,923
Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	118,883	107,723	361,268	346,635
Personal Care [Member]
Revenue [Abstract]
Revenue	43,197	37,216	128,537	119,928
Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	194,222	185,029	584,264	538,753
Flavors & Extracts [Member] \| Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	128,990	124,697	388,544	383,210
Flavors & Extracts [Member] \| Natural Ingredients [Member]
Revenue [Abstract]
Revenue	74,289	66,300	217,040	174,923
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	156,672	142,026	475,961	455,507
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	118,883	107,723	361,268	346,635
Color [Member] \| Personal Care [Member]
Revenue [Abstract]
Revenue	43,197	37,216	128,537	119,928
Asia Pacific [Member]
Revenue [Abstract]
Revenue	41,719	36,774	120,583	112,888
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	407,137	372,710	1,216,053	1,137,584
Reportable Segments [Member] \| Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	203,279	190,997	605,584	558,133
Reportable Segments [Member] \| Color [Member]
Revenue [Abstract]
Revenue	162,080	144,939	489,805	466,563
Reportable Segments [Member] \| Asia Pacific [Member]
Revenue [Abstract]
Revenue	41,778	36,774	120,664	112,888
Intersegment Revenue [Member]
Revenue [Abstract]
Revenue	14,524	8,881	35,245	30,436
Intersegment Revenue [Member] \| Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	9,057	5,968	21,320	19,380
Intersegment Revenue [Member] \| Color [Member]
Revenue [Abstract]
Revenue	5,408	2,913	13,844	11,056
Intersegment Revenue [Member] \| Asia Pacific [Member]
Revenue [Abstract]
Revenue	$ 59	$ 0	$ 81	$ 0