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SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 28, 2019 | Sep. 29, 2018 | Sep. 30, 2017
Allowance for Doubtful Accounts [Member] |  |  |  |
Valuation And Qualifying Accounts Disclosure [Line Items] |  |  |  |
Balance at Beginning of Period |  | $ 3,629 | $ 3,044 | $ 2,441
Charged (credited) to Costs and Expenses |  | 2,580 | 4,443 | 3,545
Other Additions |  | 0 | 0 | 0
Deductions | [1] | (3,636) | (3,858) | (2,942)
Balance at End of Period |  | 2,573 | 3,629 | 3,044
Valuation Allowance of Deferred Tax Assets [Member] |  |  |  |
Valuation And Qualifying Accounts Disclosure [Line Items] |  |  |  |
Balance at Beginning of Period |  | 37,881 | 59,188 | 58,782
Charged (credited) to Costs and Expenses |  | 115 | (1,366) | 406
Other Additions |  | 0 | 0 | 0
Deductions | [1] | 0 | (19,941) | 0
Balance at End of Period |  | $ 37,996 | $ 37,881 | $ 59,188
[1] | Represents amounts that did not impact earnings.

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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) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. + 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) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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