| Goodwill and Other Intangibles, Net - Summary of Goodwill (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended | |
|---|---|---|---|
| Jan. 02, 2021 | Oct. 03, 2020 | Sep. 28, 2019 | |
| Goodwill [Roll Forward] | |||
| Beginning Balance | $ 93,295 | $ 89,739 | $ 84,518 | 
| Acquisitions | 93,295 | 3,556 | 4,283 | 
| Other adjustments | 938 | ||
| Ending Balance | $ 92,821 | $ 93,295 | $ 89,739 | 
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of increase (decrease), classified as other, of an asset representing the future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available. 
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