Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Oct. 01, 2022	Jul. 02, 2022	Oct. 02, 2021	Apr. 03, 2021	Oct. 01, 2022	Oct. 02, 2021	Jan. 01, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 1,747,599		$ 1,185,916		$ 4,764,121	$ 3,431,301
Cost of sales and operating expenses	1,371,237		859,604		3,623,321	2,510,461
Gain on sale of assets	3,116		501		4,560	793
Selling, general and administrative expenses	105,080		97,275		314,888	293,805
Restructuring and asset impairment charges	0	$ 8,600	0	$ 800	8,557	778
Acquisition and integration costs	4,503		0		13,634	0
Depreciation and amortization	104,978		77,826		277,337	235,582
Equity in net income of Diamond Green Diesel	103,414		53,951		248,898	281,964
Operating income	268,331		205,663		779,842	673,432
Equity in net income of other unconsolidated subsidiaries	2,301		1,647		5,933	4,199
Total other expense	(43,116)		(16,467)		(89,283)	(51,614)
Income before income taxes	227,516		190,843		696,492	626,017
Segment Assets	8,808,754				8,808,754		$ 6,133,728
Feed Ingredients
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	1,273,142		769,626		3,322,927	2,193,002
Cost of sales and operating expenses	1,012,899		553,662		2,522,728	1,584,667
Gross Margin	260,243		215,964		800,199	608,335
Gain on sale of assets	(2,290)		(229)		(3,595)	(490)
Selling, general and administrative expenses	63,973		54,997		185,045	162,594
Restructuring and asset impairment charges					8,557	0
Acquisition and integration costs	0				0
Depreciation and amortization	80,679		53,824		203,967	162,404
Equity in net income of Diamond Green Diesel	0		0		0	0
Operating income	117,881		107,372		406,225	283,827
Equity in net income of other unconsolidated subsidiaries	2,301		1,647		5,933	4,199
Segment income/(loss)	120,182		109,019		412,158	288,026
Segment Assets	4,324,489				4,324,489		2,714,528
Food Ingredients
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	347,902		311,856		1,071,897	926,952
Cost of sales and operating expenses	256,557		241,308		807,833	706,260
Gross Margin	91,345		70,548		264,064	220,692
Gain on sale of assets	(809)		(8)		(891)	(1)
Selling, general and administrative expenses	23,909		24,417		73,608	75,150
Restructuring and asset impairment charges					0	0
Acquisition and integration costs	0				0
Depreciation and amortization	14,408		14,933		44,307	45,666
Equity in net income of Diamond Green Diesel	0		0		0	0
Operating income	53,837		31,206		147,040	99,877
Equity in net income of other unconsolidated subsidiaries	0		0		0	0
Segment income/(loss)	53,837		31,206		147,040	99,877
Segment Assets	1,192,518				1,192,518		1,205,217
Fuel Ingredients
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	126,555		104,434		369,297	311,347
Cost of sales and operating expenses	101,781		64,634		292,760	219,534
Gross Margin	24,774		39,800		76,537	91,813
Gain on sale of assets	(17)		(264)		(74)	(302)
Selling, general and administrative expenses	1,724		4,481		9,921	13,822
Restructuring and asset impairment charges					0	778
Acquisition and integration costs	0				0
Depreciation and amortization	7,284		6,361		20,894	19,214
Equity in net income of Diamond Green Diesel	103,414		53,951		248,898	281,964
Operating income	119,197		83,173		294,694	340,265
Equity in net income of other unconsolidated subsidiaries	0		0		0	0
Segment income/(loss)	119,197		83,173		294,694	340,265
Segment Assets	2,140,922				2,140,922		1,658,892
Corporate
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	0		0		0	0
Cost of sales and operating expenses	0		0		0	0
Gross Margin	0		0		0	0
Gain on sale of assets	0		0		0	0
Selling, general and administrative expenses	15,474		13,380		46,314	42,239
Restructuring and asset impairment charges					0	0
Acquisition and integration costs	4,503				13,634
Depreciation and amortization	2,607		2,708		8,169	8,298
Equity in net income of Diamond Green Diesel	0		0		0	0
Operating income	(22,584)		(16,088)		(68,117)	(50,537)
Equity in net income of other unconsolidated subsidiaries	0		0		0	0
Segment income/(loss)	(22,584)		(16,088)		(68,117)	(50,537)
Segment Assets	1,150,825				1,150,825		555,091
Total
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	1,747,599		1,185,916		4,764,121	3,431,301
Cost of sales and operating expenses	1,371,237		859,604		3,623,321	2,510,461
Gross Margin	376,362		326,312		1,140,800	920,840
Gain on sale of assets	(3,116)		(501)		(4,560)	(793)
Selling, general and administrative expenses	105,080		97,275		314,888	293,805
Restructuring and asset impairment charges					8,557	778
Acquisition and integration costs	4,503				13,634
Depreciation and amortization	104,978		77,826		277,337	235,582
Equity in net income of Diamond Green Diesel	103,414		53,951		248,898	281,964
Operating income	268,331		205,663		779,842	673,432
Equity in net income of other unconsolidated subsidiaries	2,301		1,647		5,933	4,199
Segment income/(loss)	270,632		$ 207,310		785,775	$ 677,631
Segment Assets	$ 8,808,754				$ 8,808,754		$ 6,133,728