Segment Information, Revenue from External Customers by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue [Abstract]
Revenue	$ 414,230	$ 403,525	$ 806,555	$ 788,195
Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	141,736	134,749	271,917	259,554
Natural Ingredients [Member]
Revenue [Abstract]
Revenue	61,515	74,464	125,015	142,751
Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	136,377	125,327	260,977	242,385
Personal Care [Member]
Revenue [Abstract]
Revenue	42,905	42,373	86,055	85,340
Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	197,481	202,020	385,279	390,042
Flavors & Extracts [Member] \| Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	141,736	134,749	271,917	259,554
Flavors & Extracts [Member] \| Natural Ingredients [Member]
Revenue [Abstract]
Revenue	61,515	74,464	125,015	142,751
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	174,072	162,925	336,708	319,289
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	136,377	125,327	260,977	242,385
Color [Member] \| Personal Care [Member]
Revenue [Abstract]
Revenue	42,905	42,373	86,055	85,340
Asia Pacific [Member]
Revenue [Abstract]
Revenue	42,677	38,580	84,568	78,864
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	425,277	415,493	828,609	808,916
Reportable Segments [Member] \| Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	203,251	209,213	396,932	402,305
Reportable Segments [Member] \| Color [Member]
Revenue [Abstract]
Revenue	179,282	167,700	347,032	327,725
Reportable Segments [Member] \| Asia Pacific [Member]
Revenue [Abstract]
Revenue	42,744	38,580	84,645	78,886
Intersegment Revenue [Member]
Revenue [Abstract]
Revenue	(11,047)	(11,968)	(22,054)	(20,721)
Intersegment Revenue [Member] \| Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	(5,770)	(7,193)	(11,653)	(12,263)
Intersegment Revenue [Member] \| Color [Member]
Revenue [Abstract]
Revenue	(5,210)	(4,775)	(10,324)	(8,436)
Intersegment Revenue [Member] \| Asia Pacific [Member]
Revenue [Abstract]
Revenue	$ (67)	$ 0	$ (77)	$ (22)