Segment Information, Revenue from External Customers by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue [Abstract]
Revenue	$ 384,670	$ 369,006
Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	124,805	124,825
Natural Ingredients [Member]
Revenue [Abstract]
Revenue	68,287	54,027
Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	117,058	118,747
Personal Care [Member]
Revenue [Abstract]
Revenue	42,967	42,414
Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	188,022	171,972
Flavors & Extracts [Member] | Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	124,805	124,825
Flavors & Extracts [Member] | Natural Ingredients [Member]
Revenue [Abstract]
Revenue	68,287	54,027
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	156,364	156,949
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	117,058	118,747
Color [Member] | Personal Care [Member]
Revenue [Abstract]
Revenue	42,967	42,414
Asia Pacific [Member]
Revenue [Abstract]
Revenue	40,284	40,085
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	393,423	380,098
Reportable Segments [Member] | Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	193,092	178,852
Reportable Segments [Member] | Color [Member]
Revenue [Abstract]
Revenue	160,025	161,161
Reportable Segments [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	40,306	40,085
Intersegment Revenue [Member]
Revenue [Abstract]
Revenue	8,753	11,092
Intersegment Revenue [Member] | Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	5,070	6,880
Intersegment Revenue [Member] | Color [Member]
Revenue [Abstract]
Revenue	3,661	4,212
Intersegment Revenue [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	$ 22	$ 0