Business Segments (Narrative) (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2022 USD ($) segment	Jan. 01, 2022 USD ($)	Jan. 02, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of Business Segments | segment		3
Capital expenditures for the year ended:	[1]	$ 391,309	$ 274,126	$ 280,115
Capital assets		588,800		18,400
Fuel Ingredients [Member]
Segment Reporting Information [Line Items]
Capital expenditures for the year ended:		$ 37,568	$ 26,078	$ 30,638

[1] Excludes capital assets acquired by acquisition in fiscal 2022 and fiscal 2020 of approximately $588.8 million and $18.4 million, respectively.