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Business Segments (Narrative) (Details) $ in Thousands | 12 Months Ended
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Jan. 01, 2022 USD ($) segment | Jan. 02, 2021 USD ($) | Dec. 28, 2019 USD ($)
Segment Reporting Information [Line Items] |  |  |  |
Number of Business Segments | segment |  | 3 |  |
Capital expenditures: | [1] | $ 274,126 | $ 280,115 | $ 359,498
Fuel Ingredients [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Capital expenditures: |  | $ 26,078 | $ 30,638 | $ 23,964
[1] | Excludes capital assets acquired by acquisition in fiscal 2020 of approximately $18.4 million.

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- Definition The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 50 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123362884&loc=d3e9212-128498 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 50 -Section 30 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123362884&loc=d3e9215-128498 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 50 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123385561&loc=d3e9135-128495 + Details
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