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Schedule II - Valuation and Qualifying Accounts - Schedule of Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Oct. 03, 2020 | Sep. 28, 2019 | Sep. 29, 2018
Allowance for losses on accounts receivable (deducted from the asset to which it relates) |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | $ 1,537 | $ 885 | $ 980
Additions charged to costs and expenses | 4,051 | 1,189 | 380
Additions charged to other accounts | 0 | 0 | 0
Deductions | (1,991) | (537) | (475)
Balance at end of period | 3,597 | 1,537 | 885
Valuation allowance on deferred income tax assets (deducted from the asset to which it relates) |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | 29,170 | 28,369 | 61,668
Additions charged to costs and expenses | 5,778 | 2,213 | 1,107
Additions charged to other accounts | 0 | 0 | 0
Deductions | 0 | (1,412) | (34,406)
Balance at end of period | $ 34,948 | $ 29,170 | $ 28,369

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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