Segment Information, Revenue from External Customers by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Revenue [Abstract]
Revenue from external customers	$ 462,081	$ 414,230	$ 897,915	$ 806,555
Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue from external customers	146,613	141,736	285,177	271,917
Agricultural Ingredients [Member]
Revenue [Abstract]
Revenue from external customers	66,566	61,515	129,827	125,015
Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue from external customers	167,741	136,377	319,021	260,977
Personal Care [Member]
Revenue [Abstract]
Revenue from external customers	48,396	42,905	95,292	86,055
Flavors & Extracts [Member]
Revenue [Abstract]
Revenue from external customers	204,658	197,481	400,764	385,279
Flavors & Extracts [Member] \| Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue from external customers	146,613	141,736	285,177	271,917
Flavors & Extracts [Member] \| Agricultural Ingredients [Member]
Revenue [Abstract]
Revenue from external customers	66,566	61,515	129,827	125,015
Flavors & Extracts [Member] \| Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue from external customers	0	0	0	0
Flavors & Extracts [Member] \| Personal Care [Member]
Revenue [Abstract]
Revenue from external customers	0	0	0	0
Color [Member]
Revenue [Abstract]
Revenue from external customers	209,992	174,072	404,514	336,708
Color [Member] \| Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue from external customers	0	0	0	0
Color [Member] \| Agricultural Ingredients [Member]
Revenue [Abstract]
Revenue from external customers	0	0	0	0
Color [Member] \| Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue from external customers	167,741	136,377	319,021	260,977
Color [Member] \| Personal Care [Member]
Revenue [Abstract]
Revenue from external customers	48,396	42,905	95,292	86,055
Asia Pacific [Member]
Revenue [Abstract]
Revenue from external customers	47,431	42,677	92,637	84,568
Asia Pacific [Member] \| Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue from external customers	0	0	0	0
Asia Pacific [Member] \| Agricultural Ingredients [Member]
Revenue [Abstract]
Revenue from external customers	0	0	0	0
Asia Pacific [Member] \| Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue from external customers	0	0	0	0
Asia Pacific [Member] \| Personal Care [Member]
Revenue [Abstract]
Revenue from external customers	0	0	0	0
Reportable Segments [Member]
Revenue [Abstract]
Revenue from external customers	476,905	425,277	922,161	828,609
Reportable Segments [Member] \| Flavors & Extracts [Member]
Revenue [Abstract]
Revenue from external customers	213,179	203,251	415,004	396,932
Reportable Segments [Member] \| Color [Member]
Revenue [Abstract]
Revenue from external customers	216,137	179,282	414,313	347,032
Reportable Segments [Member] \| Asia Pacific [Member]
Revenue [Abstract]
Revenue from external customers	47,589	42,744	92,844	84,645
Intersegment Revenue [Member]
Revenue [Abstract]
Revenue from external customers	(14,824)	(11,047)	(24,246)	(22,054)
Intersegment Revenue [Member] \| Flavors & Extracts [Member]
Revenue [Abstract]
Revenue from external customers	(8,521)	(5,770)	(14,240)	(11,653)
Intersegment Revenue [Member] \| Color [Member]
Revenue [Abstract]
Revenue from external customers	(6,145)	(5,210)	(9,799)	(10,324)
Intersegment Revenue [Member] \| Asia Pacific [Member]
Revenue [Abstract]
Revenue from external customers	$ (158)	$ (67)	$ (207)	$ (77)