Segment Information, Revenue from External Customers by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue [Abstract]
Revenue	$ 355,521	$ 359,702
Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	126,518	113,818
Natural Ingredients [Member]
Revenue [Abstract]
Revenue	56,209	62,204
Fragrances [Member]
Revenue [Abstract]
Revenue		22,739
Yogurt Fruit Preparations [Member]
Revenue [Abstract]
Revenue		2,150
Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	103,109	93,785
Personal Care [Member]
Revenue [Abstract]
Revenue	44,846	41,515
Inks [Member]
Revenue [Abstract]
Revenue	483	420
Asia Pacific [Member]
Revenue [Abstract]
Revenue	36,465	33,840
Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	175,202	194,661
Flavors & Extracts [Member] | Flavors, Extracts & Flavor Ingredients [Member]
Revenue [Abstract]
Revenue	126,518	113,818
Flavors & Extracts [Member] | Natural Ingredients [Member]
Revenue [Abstract]
Revenue	56,209	62,204
Flavors & Extracts [Member] | Fragrances [Member]
Revenue [Abstract]
Revenue		22,739
Flavors & Extracts [Member] | Yogurt Fruit Preparations [Member]
Revenue [Abstract]
Revenue		2,150
Color [Member]
Revenue [Abstract]
Revenue	143,928	131,201
Color [Member] | Food & Pharmaceutical Colors [Member]
Revenue [Abstract]
Revenue	103,109	93,785
Color [Member] | Personal Care [Member]
Revenue [Abstract]
Revenue	44,846	41,515
Color [Member] | Inks [Member]
Revenue [Abstract]
Revenue	483	420
Asia Pacific [Member]
Revenue [Abstract]
Revenue	36,391	33,840
Asia Pacific [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	36,465	33,840
Intersegment Revenue [Member]
Revenue [Abstract]
Revenue	12,109	10,769
Intersegment Revenue [Member] | Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	7,525	6,250
Intersegment Revenue [Member] | Color [Member]
Revenue [Abstract]
Revenue	4,510	4,519
Intersegment Revenue [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	$ 74	$ 0