Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Apr. 02, 2022	Dec. 31, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 1,791,172	$ 1,366,334
Cost of sales and operating expenses	1,366,973	1,020,577
Loss/(gain) on sale of assets	327	389
Selling, general and administrative expenses	135,466	102,032
Restructuring and asset impairment charges	4,524	0
Acquisition and integration costs	7,022	3,773
Depreciation and amortization	116,006	79,246
Equity in net income of Diamond Green Diesel	94,337	71,804
Operating income	255,845	232,899
Equity in net income of other unconsolidated subsidiaries	120	1,360
Total other expense	(39,136)	(17,445)
Income before income taxes	216,829	216,814
Segment Assets	10,861,132		$ 9,202,370
Feed Ingredients
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	1,237,494	879,438
Cost of sales and operating expenses	950,072	645,523
Gross Margin	287,422	233,915
Loss/(gain) on sale of assets	(342)	(341)
Selling, general and administrative expenses	74,691	56,209
Restructuring and asset impairment charges	92
Acquisition and integration costs	0	0
Depreciation and amortization	90,320	54,350
Equity in net income of Diamond Green Diesel	0	0
Operating income	122,661	123,697
Equity in net income of other unconsolidated subsidiaries	120	1,360
Segment income/(loss)	122,781	125,057
Segment Assets	4,807,542		4,866,351
Food Ingredients
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	396,392	354,814
Cost of sales and operating expenses	290,115	270,312
Gross Margin	106,277	84,502
Loss/(gain) on sale of assets	(21)	(9)
Selling, general and administrative expenses	33,122	26,844
Restructuring and asset impairment charges	4,432
Acquisition and integration costs	0	0
Depreciation and amortization	14,473	15,450
Equity in net income of Diamond Green Diesel	0	0
Operating income	54,271	42,217
Equity in net income of other unconsolidated subsidiaries	0	0
Segment income/(loss)	54,271	42,217
Segment Assets	2,593,490		1,251,473
Fuel Ingredients
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	157,286	132,082
Cost of sales and operating expenses	126,786	104,742
Gross Margin	30,500	27,340
Loss/(gain) on sale of assets	36	(39)
Selling, general and administrative expenses	6,192	3,920
Restructuring and asset impairment charges	0
Acquisition and integration costs	0	0
Depreciation and amortization	8,393	6,674
Equity in net income of Diamond Green Diesel	94,337	71,804
Operating income	110,216	88,589
Equity in net income of other unconsolidated subsidiaries	0	0
Segment income/(loss)	110,216	88,589
Segment Assets	2,505,583		2,307,199
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	21,461	15,059
Restructuring and asset impairment charges	0
Acquisition and integration costs	7,022	3,773
Depreciation and amortization	2,820	2,772
Equity in net income of Diamond Green Diesel	0	0
Operating income	(31,303)	(21,604)
Equity in net income of other unconsolidated subsidiaries	0	0
Segment income/(loss)	(31,303)	(21,604)
Segment Assets	954,517		777,347
Total
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	1,791,172	1,366,334
Cost of sales and operating expenses	1,366,973	1,020,577
Gross Margin	424,199	345,757
Loss/(gain) on sale of assets	(327)	(389)
Selling, general and administrative expenses	135,466	102,032
Restructuring and asset impairment charges	4,524
Acquisition and integration costs	7,022	3,773
Depreciation and amortization	116,006	79,246
Equity in net income of Diamond Green Diesel	94,337	71,804
Operating income	255,845	232,899
Equity in net income of other unconsolidated subsidiaries	120	1,360
Segment income/(loss)	255,965	$ 234,259
Segment Assets	$ 10,861,132		$ 9,202,370