SEGMENT INFORMATION - Business Segment Net Sales (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Net sales	$ 267,558			$ 239,940			$ 773,544	$ 713,680
Cost of sales	172,105			154,579			496,810	463,811
Gross margin	95,453			85,361			276,734	249,869
Operating expenses	40,874			37,369			119,698	114,404
Earnings from operations	54,579			47,992			157,036	135,465
Interest expense, net	2,629			4,071			8,319	13,709
Other income, net	(94)			28			(278)	(213)
Nonoperating Income (Expense)	2,535			4,099			8,041	13,496
Earnings before income tax expense	52,044			43,893			148,995	121,969
Income tax expense	11,755			10,056			33,375	27,077
Net earnings	40,289	$ 38,278	$ 37,053	33,837	$ 32,069	$ 28,986	115,620	94,892
Operating Segments | Human Nutrition and Health
Segment Reporting Information [Line Items]
Net sales	174,088			152,283			493,318	452,955
Cost of sales	109,961			95,827			308,811	286,424
Gross margin	64,127			56,456			184,507	166,531
Operating expenses	23,296			20,878			67,360	64,329
Earnings from operations	40,831			35,578			117,147	102,202
Operating Segments | Animal Nutrition and Health
Segment Reporting Information [Line Items]
Net sales	56,376			52,906			169,681	156,384
Cost of sales	44,630			42,254			134,033	126,263
Gross margin	11,746			10,652			35,648	30,121
Operating expenses	8,033			7,123			23,185	21,839
Earnings from operations	3,713			3,529			12,463	8,282
Operating Segments | Specialty Products
Segment Reporting Information [Line Items]
Net sales	35,683			33,191			106,143	99,898
Cost of sales	15,735			14,338			48,292	44,929
Gross margin	19,948			18,853			57,851	54,969
Operating expenses	8,414			8,337			25,463	25,026
Earnings from operations	11,534			10,516			32,388	29,943
Other and Unallocated
Segment Reporting Information [Line Items]
Net sales	1,411			1,560			4,402	4,443
Cost of sales	1,779			2,160			5,674	6,195
Gross margin	(368)			(600)			(1,272)	(1,752)
Operating expenses	1,131			1,031			3,690	3,210
Earnings from operations	$ (1,499)			$ (1,631)			$ (4,962)	$ (4,962)