Revenue Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2022	Apr. 03, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 1,366,334	$ 1,046,716
Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	879,438	651,444
Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	354,814	298,065
Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	132,082	97,207
North America
Disaggregation of Revenue [Line Items]
Net sales	839,738	613,305
North America | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	755,838	549,015
North America | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	83,900	60,940
North America | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	3,350
Europe
Disaggregation of Revenue [Line Items]
Net sales	428,555	346,865
Europe | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	114,463	97,645
Europe | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	182,010	155,363
Europe | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	132,082	93,857
China
Disaggregation of Revenue [Line Items]
Net sales	72,943	59,870
China | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	6,636	1,938
China | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	66,307	57,932
China | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
South America
Disaggregation of Revenue [Line Items]
Net sales	8,496	10,454
South America | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
South America | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	8,496	10,454
South America | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other
Disaggregation of Revenue [Line Items]
Net sales	16,602	16,222
Other | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	2,501	2,846
Other | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	14,101	13,376
Other | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Fats
Disaggregation of Revenue [Line Items]
Net sales	420,658	270,439
Fats | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	368,394	229,006
Fats | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	52,264	41,433
Fats | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Used cooking oil
Disaggregation of Revenue [Line Items]
Net sales	94,896	51,029
Used cooking oil | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	94,896	51,029
Used cooking oil | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Used cooking oil | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Proteins
Disaggregation of Revenue [Line Items]
Net sales	270,187	255,507
Proteins | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	270,187	255,507
Proteins | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Proteins | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Bakery
Disaggregation of Revenue [Line Items]
Net sales	78,511	63,105
Bakery | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	78,511	63,105
Bakery | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Bakery | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other rendering
Disaggregation of Revenue [Line Items]
Net sales	57,544	42,957
Other rendering | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	57,544	42,957
Other rendering | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other rendering | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Food ingredients
Disaggregation of Revenue [Line Items]
Net sales	270,516	229,542
Food ingredients | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Food ingredients | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	270,516	229,542
Food ingredients | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Bioenergy
Disaggregation of Revenue [Line Items]
Net sales	132,082	93,857
Bioenergy | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Bioenergy | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Bioenergy | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	132,082	93,857
Biofuels
Disaggregation of Revenue [Line Items]
Net sales		3,350
Biofuels | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales		0
Biofuels | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales		0
Biofuels | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales		3,350
Other
Disaggregation of Revenue [Line Items]
Net sales	41,940	36,930
Other | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	9,906	9,840
Other | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	32,034	27,090
Other | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0