Segment and Geographic Information, Revenue from External Customers by Products Line (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue [Abstract]
Revenue	$ 1,456,450	$ 1,437,039	$ 1,380,264
Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	496,036	498,055	455,818
Natural Ingredients [Member]
Revenue [Abstract]
Revenue	245,036	239,948	255,772
Fragrances [Member]
Revenue [Abstract]
Revenue			22,739
Yogurt Fruit Preparations [Member]
Revenue [Abstract]
Revenue			5,098
Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	452,204	437,065	385,069
Personal Care [Member]
Revenue [Abstract]
Revenue	155,755	165,335	158,237
Inks [Member]
Revenue [Abstract]
Revenue		1,617	1,964
Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	716,049	710,592	717,688
Flavors & Extracts [Member] | Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	496,036	498,055	455,818
Flavors & Extracts [Member] | Natural Ingredients [Member]
Revenue [Abstract]
Revenue	245,036	239,948	255,772
Flavors & Extracts [Member] | Fragrances [Member]
Revenue [Abstract]
Revenue			22,739
Flavors & Extracts [Member] | Yogurt Fruit Preparations [Member]
Revenue [Abstract]
Revenue			5,098
Flavors & Extracts [Member] | Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	0	0	0
Flavors & Extracts [Member] | Personal Care [Member]
Revenue [Abstract]
Revenue	0	0	0
Flavors & Extracts [Member] | Inks [Member]
Revenue [Abstract]
Revenue		0	0
Color [Member]
Revenue [Abstract]
Revenue	594,316	583,379	527,626
Color [Member] | Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	0	0	0
Color [Member] | Natural Ingredients [Member]
Revenue [Abstract]
Revenue	0	0	0
Color [Member] | Fragrances [Member]
Revenue [Abstract]
Revenue			0
Color [Member] | Yogurt Fruit Preparations [Member]
Revenue [Abstract]
Revenue			0
Color [Member] | Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	452,204	437,065	385,069
Color [Member] | Personal Care [Member]
Revenue [Abstract]
Revenue	155,755	165,335	158,237
Color [Member] | Inks [Member]
Revenue [Abstract]
Revenue		1,617	1,964
Asia Pacific [Member]
Revenue [Abstract]
Revenue	146,085	143,068	134,950
Asia Pacific [Member] | Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	0	0	0
Asia Pacific [Member] | Natural Ingredients [Member]
Revenue [Abstract]
Revenue	0	0	0
Asia Pacific [Member] | Fragrances [Member]
Revenue [Abstract]
Revenue			0
Asia Pacific [Member] | Yogurt Fruit Preparations [Member]
Revenue [Abstract]
Revenue			0
Asia Pacific [Member] | Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	0	0	0
Asia Pacific [Member] | Personal Care [Member]
Revenue [Abstract]
Revenue	0	0	0
Asia Pacific [Member] | Inks [Member]
Revenue [Abstract]
Revenue		0	0
Reportable Segments [Member]
Revenue [Abstract]
Revenue	1,495,121	1,485,601	1,420,045
Reportable Segments [Member] | Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	741,072	738,003	739,427
Reportable Segments [Member] | Color [Member]
Revenue [Abstract]
Revenue	607,959	604,017	545,270
Reportable Segments [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	146,090	143,581	135,348
Intersegment Revenue [Member]
Revenue [Abstract]
Revenue	38,671	48,562	39,781
Intersegment Revenue [Member] | Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	25,023	27,411	21,739
Intersegment Revenue [Member] | Color [Member]
Revenue [Abstract]
Revenue	13,643	20,638	17,644
Intersegment Revenue [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	$ 5	$ 513	$ 398