Segment and Geographic Information, Segment and Geographic Info (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue [Abstract]
Revenue from external customers	$ 1,456,450	$ 1,437,039	$ 1,380,264
Long-lived assets	1,077,891	1,046,834	1,004,340
North America [Member]
Revenue [Abstract]
Revenue from external customers	858,910	846,018	787,107
Long-lived assets	690,340	665,356	624,766
Europe [Member]
Revenue [Abstract]
Revenue from external customers	276,637	267,575	278,229
Long-lived assets	327,549	322,991	317,875
Asia Pacific [Member]
Revenue [Abstract]
Revenue from external customers	221,666	229,290	221,566
Long-lived assets	34,680	33,948	37,689
Other [Member]
Revenue [Abstract]
Revenue from external customers	99,237	94,156	93,362
Long-lived assets	25,322	24,539	24,010
United States [Member]
Revenue [Abstract]
Revenue from external customers	707,100	711,100	658,000
Long-lived assets	603,200	586,800	550,300
Flavors & Extracts [Member]
Revenue [Abstract]
Revenue from external customers	716,049	710,592	717,688
Long-lived assets	380,802	373,371	361,711
Color [Member]
Revenue [Abstract]
Revenue from external customers	594,316	583,379	527,626
Long-lived assets	551,597	535,740	504,553
Asia Pacific [Member]
Revenue [Abstract]
Revenue from external customers	146,085	143,068	134,950
Long-lived assets	30,473	29,915	32,901
Reportable Geographical Components [Member] | Flavors & Extracts [Member] | North America [Member]
Revenue [Abstract]
Revenue from external customers	553,790	541,120	523,960
Long-lived assets	297,615	286,497	268,934
Reportable Geographical Components [Member] | Flavors & Extracts [Member] | Europe [Member]
Revenue [Abstract]
Revenue from external customers	113,757	115,925	135,348
Long-lived assets	82,938	86,248	91,934
Reportable Geographical Components [Member] | Flavors & Extracts [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue from external customers	21,382	29,092	29,880
Long-lived assets	8	237	275
Reportable Geographical Components [Member] | Flavors & Extracts [Member] | Other [Member]
Revenue [Abstract]
Revenue from external customers	27,120	24,455	28,500
Long-lived assets	241	389	568
Reportable Geographical Components [Member] | Color [Member] | North America [Member]
Revenue [Abstract]
Revenue from external customers	304,995	304,778	263,031
Long-lived assets	277,730	271,075	250,682
Reportable Geographical Components [Member] | Color [Member] | Europe [Member]
Revenue [Abstract]
Revenue from external customers	162,644	151,437	142,741
Long-lived assets	244,587	236,719	225,916
Reportable Geographical Components [Member] | Color [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue from external customers	58,003	61,064	59,914
Long-lived assets	4,199	3,796	4,513
Reportable Geographical Components [Member] | Color [Member] | Other [Member]
Revenue [Abstract]
Revenue from external customers	68,674	66,100	61,940
Long-lived assets	25,081	24,150	23,442
Reportable Geographical Components [Member] | Asia Pacific [Member] | North America [Member]
Revenue [Abstract]
Revenue from external customers	125	120	116
Long-lived assets	0	0	0
Reportable Geographical Components [Member] | Asia Pacific [Member] | Europe [Member]
Revenue [Abstract]
Revenue from external customers	236	213	140
Long-lived assets	0	0	0
Reportable Geographical Components [Member] | Asia Pacific [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue from external customers	142,281	139,134	131,772
Long-lived assets	30,473	29,915	32,901
Reportable Geographical Components [Member] | Asia Pacific [Member] | Other [Member]
Revenue [Abstract]
Revenue from external customers	3,443	3,601	2,922
Long-lived assets	0	0	0
Corporate & Other [Member] | Corporate and Other [Member]
Revenue [Abstract]
Revenue from external customers	0	0	0
Long-lived assets	115,019	107,808	105,175
Corporate & Other [Member] | Corporate and Other [Member] | North America [Member]
Revenue [Abstract]
Revenue from external customers	0	0	0
Long-lived assets	114,995	107,784	105,150
Corporate & Other [Member] | Corporate and Other [Member] | Europe [Member]
Revenue [Abstract]
Revenue from external customers	0	0	0
Long-lived assets	24	24	25
Corporate & Other [Member] | Corporate and Other [Member] | Asia Pacific [Member]
Revenue [Abstract]
Revenue from external customers	0	0	0
Long-lived assets	0	0	0
Corporate & Other [Member] | Corporate and Other [Member] | Other [Member]
Revenue [Abstract]
Revenue from external customers	0	0	0
Long-lived assets	$ 0	$ 0	$ 0