SEGMENT INFORMATION - Business Segment Net Sales (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Net sales	$ 263,617	$ 267,558	$ 255,467	$ 250,519	$ 240,004	$ 239,940	$ 234,081	$ 239,659	$ 1,037,161	$ 953,684	$ 922,439
Cost of sales									666,528	617,478	620,383
Gross margin	93,899	95,453	93,113	88,168	86,337	85,361	82,994	81,514	370,633	336,206	302,056
Operating Expenses									161,307	153,297	142,863
Earnings from operations									209,326	182,909	159,193
Interest expense, net									10,219	16,528	22,613
Other expense (income)									77	(72)	(681)
Nonoperating Income (Expense)									10,296	16,456	21,932
Earnings before income tax expense	50,035	52,044	49,011	47,940	44,484	43,893	41,226	36,850	199,030	166,453	137,261
Income tax expense									44,185	37,978	28,718
Net earnings	$ 39,225	$ 40,289	$ 38,278	$ 37,053	$ 33,583	$ 33,837	$ 32,069	$ 28,986	154,845	128,475	108,543
Operating Segments | Human Nutrition and Health
Segment Reporting Information [Line Items]
Net sales									659,387	600,258	550,751
Cost of sales									415,102	378,411	366,539
Gross margin									244,285	221,847	184,212
Operating Expenses									90,379	85,890	81,793
Earnings from operations									153,906	135,957	102,419
Operating Segments | Animal Nutrition and Health
Segment Reporting Information [Line Items]
Net sales									230,852	214,710	238,326
Cost of sales									180,292	171,409	183,827
Gross margin									50,560	43,301	54,499
Operating Expenses									31,873	29,288	26,923
Earnings from operations									18,687	14,013	27,576
Operating Segments | Specialty Products
Segment Reporting Information [Line Items]
Net sales									140,976	132,749	125,965
Cost of sales									63,611	59,449	62,183
Gross margin									77,365	73,300	63,782
Operating Expenses									34,464	33,394	29,203
Earnings from operations									42,901	39,906	34,579
Other and Unallocated
Segment Reporting Information [Line Items]
Net sales									5,946	5,967	7,397
Cost of sales									7,523	8,209	7,834
Gross margin									(1,577)	(2,242)	(437)
Operating Expenses									4,591	4,725	4,944
Earnings from operations									$ (6,168)	$ (6,967)	$ (5,381)