Segment Information, Revenue from External Customers by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenue [Abstract]
Revenue	$ 392,325	$ 384,670
Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	130,181	124,805
Natural Ingredients [Member]
Revenue [Abstract]
Revenue	63,500	68,287
Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	124,600	117,058
Personal Care [Member]
Revenue [Abstract]
Revenue	43,150	42,967
Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	187,798	188,022
Flavors & Extracts [Member] | Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	130,181	124,805
Flavors & Extracts [Member] | Natural Ingredients [Member]
Revenue [Abstract]
Revenue	63,500	68,287
Flavors & Extracts [Member] | Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	0	0
Flavors & Extracts [Member] | Personal Care [Member]
Revenue [Abstract]
Revenue	0	0
Color [Member]
Revenue [Abstract]
Revenue	162,636	156,364
Color [Member] | Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	0	0
Color [Member] | Natural Ingredients [Member]
Revenue [Abstract]
Revenue	0	0
Color [Member] | Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	124,600	117,058
Color [Member] | Personal Care [Member]
Revenue [Abstract]
Revenue	43,150	42,967
Asia Pacific [Member]
Revenue [Abstract]
Revenue	41,891	40,284
Asia Pacific [Member] | Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	0	0
Asia Pacific [Member] | Natural Ingredients [Member]
Revenue [Abstract]
Revenue	0	0
Asia Pacific [Member] | Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	0	0
Asia Pacific [Member] | Personal Care [Member]
Revenue [Abstract]
Revenue	0	0
Reportable Segments [Member]
Revenue [Abstract]
Revenue	403,332	393,423
Reportable Segments [Member] | Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	193,681	193,092
Reportable Segments [Member] | Color [Member]
Revenue [Abstract]
Revenue	167,750	160,025
Reportable Segments [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	41,901	40,306
Intersegment Revenue [Member]
Revenue [Abstract]
Revenue	(11,007)	(8,753)
Intersegment Revenue [Member] | Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	(5,883)	(5,070)
Intersegment Revenue [Member] | Color [Member]
Revenue [Abstract]
Revenue	(5,114)	(3,661)
Intersegment Revenue [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	$ (10)	$ (22)