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Impairment and Other Charges, Net - Restructuring Costs (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 05, 2020 | Jul. 07, 2019 | Jul. 05, 2020 | Jul. 07, 2019
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring costs | $ 2 |  | $ (64) |  | $ 1,165 | $ 6,722 |
Employee severance and related costs |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring costs | 2 |  | 287 |  | 1,165 | 5,436 |
Strategic Alternative Evaluation |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring costs | $ 0 | [1] | $ (351) | [1] | $ 0 | $ 1,286 | [1]
[1] | Strategic Alternative Evaluation costs primarily relate to third party advisory services.

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- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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