Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023	Dec. 30, 2023
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 1,420,299	$ 1,791,172
Cost of sales and operating expenses	1,116,666	1,366,973
Loss/(gain) on sale of assets	574	327
Selling, general and administrative expenses	139,143	135,466
Restructuring and asset impairment charges	0	4,524
Acquisition and integration costs	4,054	7,022
Change in fair value of contingent consideration	(25,249)	0
Depreciation and amortization	127,509	116,006
Equity in net income of Diamond Green Diesel	78,419	94,337
Operating income	137,169	255,845
Equity in net income of other unconsolidated subsidiaries	2,310	120
Total other expense	(53,984)	(39,136)
Income before income taxes	85,495	216,829
Segment Assets	10,942,769		$ 11,061,084
Feed Ingredients
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	889,848	1,237,494
Cost of sales and operating expenses	705,769	950,072
Gross Margin	184,079	287,422
Loss/(gain) on sale of assets	132	(342)
Selling, general and administrative expenses	77,138	74,691
Restructuring and asset impairment charges		92
Acquisition and integration costs	0	0
Change in fair value of contingent consideration	(25,249)
Depreciation and amortization	87,569	90,320
Equity in net income of Diamond Green Diesel	0	0
Operating income	44,489	122,661
Equity in net income of other unconsolidated subsidiaries	2,310	120
Segment income/(loss)	46,799	122,781
Segment Assets	4,552,622		4,702,593
Food Ingredients
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	391,282	396,392
Cost of sales and operating expenses	298,145	290,115
Gross Margin	93,137	106,277
Loss/(gain) on sale of assets	(294)	(21)
Selling, general and administrative expenses	31,744	33,122
Restructuring and asset impairment charges		4,432
Acquisition and integration costs	0	0
Change in fair value of contingent consideration	0
Depreciation and amortization	28,868	14,473
Equity in net income of Diamond Green Diesel	0	0
Operating income	32,819	54,271
Equity in net income of other unconsolidated subsidiaries	0	0
Segment income/(loss)	32,819	54,271
Segment Assets	2,490,351		2,646,702
Fuel Ingredients
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	139,169	157,286
Cost of sales and operating expenses	112,752	126,786
Gross Margin	26,417	30,500
Loss/(gain) on sale of assets	(412)	36
Selling, general and administrative expenses	8,745	6,192
Restructuring and asset impairment charges		0
Acquisition and integration costs	0	0
Change in fair value of contingent consideration	0
Depreciation and amortization	8,667	8,393
Equity in net income of Diamond Green Diesel	78,419	94,337
Operating income	87,836	110,216
Equity in net income of other unconsolidated subsidiaries	0	0
Segment income/(loss)	87,836	110,216
Segment Assets	2,679,811		2,589,145
Corporate
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	0	0
Cost of sales and operating expenses	0	0
Gross Margin	0	0
Loss/(gain) on sale of assets	0	0
Selling, general and administrative expenses	21,516	21,461
Restructuring and asset impairment charges		0
Acquisition and integration costs	4,054	7,022
Change in fair value of contingent consideration	0
Depreciation and amortization	2,405	2,820
Equity in net income of Diamond Green Diesel	0	0
Operating income	(27,975)	(31,303)
Equity in net income of other unconsolidated subsidiaries	0	0
Segment income/(loss)	(27,975)	(31,303)
Segment Assets	1,219,985		1,122,644
Total
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	1,420,299	1,791,172
Cost of sales and operating expenses	1,116,666	1,366,973
Gross Margin	303,633	424,199
Loss/(gain) on sale of assets	(574)	(327)
Selling, general and administrative expenses	139,143	135,466
Restructuring and asset impairment charges		4,524
Acquisition and integration costs	4,054	7,022
Change in fair value of contingent consideration	(25,249)
Depreciation and amortization	127,509	116,006
Equity in net income of Diamond Green Diesel	78,419	94,337
Operating income	137,169	255,845
Equity in net income of other unconsolidated subsidiaries	2,310	120
Segment income/(loss)	139,479	$ 255,965
Segment Assets	$ 10,942,769		$ 11,061,084