Segment Information, Operating Results by Segment (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) Segment	Sep. 30, 2022 USD ($)
Segment Information [Abstract]
Number of reportable segments | Segment			3
Revenue [Abstract]
Revenue	$ 363,829	$ 361,076	$ 1,107,148	$ 1,088,303
Operating income (loss)	44,531	47,493	146,960	155,526
Interest expense	6,294	3,672	18,648	9,748
Earnings before income taxes	38,237	43,821	128,312	145,778
Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	185,029	181,397	538,753	539,014
Operating income (loss)	23,078	26,337	69,714	83,929
Interest expense	0	0	0	0
Earnings before income taxes	23,078	26,337	69,714	83,929
Color [Member]
Revenue [Abstract]
Revenue	142,026	144,570	455,507	440,568
Operating income (loss)	22,925	28,200	84,027	90,035
Interest expense	0	0	0	0
Earnings before income taxes	22,925	28,200	84,027	90,035
Asia Pacific [Member]
Revenue [Abstract]
Revenue	36,774	35,109	112,888	108,721
Operating income (loss)	8,095	6,952	24,911	22,877
Interest expense	0	0	0	0
Earnings before income taxes	8,095	6,952	24,911	22,877
Reportable Segments [Member]
Revenue [Abstract]
Revenue	372,710	373,736	1,137,584	1,124,299
Reportable Segments [Member] | Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	190,997	187,046	558,133	559,110
Reportable Segments [Member] | Color [Member]
Revenue [Abstract]
Revenue	144,939	151,469	466,563	456,175
Reportable Segments [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	36,774	35,221	112,888	109,014
Intersegment Revenue [Member]
Revenue [Abstract]
Revenue	8,881	12,660	30,436	35,996
Intersegment Revenue [Member] | Flavors & Extracts [Member]
Revenue [Abstract]
Revenue	5,968	5,649	19,380	20,096
Intersegment Revenue [Member] | Color [Member]
Revenue [Abstract]
Revenue	2,913	6,899	11,056	15,607
Intersegment Revenue [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue	0	112	0	293
Corporate & Other [Member] | Corporate and Other [Member]
Revenue [Abstract]
Revenue	0	0	0	0
Operating income (loss)	(9,567)	(13,996)	(31,692)	(41,315)
Interest expense	6,294	3,672	18,648	9,748
Earnings before income taxes	$ (15,861)	$ (17,668)	$ (50,340)	$ (51,063)