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Impairment and Other Charges, Net (Restructuring Costs) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 29, 2019 | Sep. 30, 2018 | Oct. 01, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs |  | $ 8,455 | $ 10,647 | $ 3,631
Expect to recognize severance and related costs |  | 1,300 |  |
Employee severance and related costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs |  | 7,169 | 7,845 | 724
Strategic Alternatives Evaluation |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs | [1] | 1,286 | 0 | 0
Qdoba Evaluation |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs | [2] | 0 | 2,211 | 2,592
Other |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring costs |  | $ 0 | $ 591 | $ 315
[1] | Strategic Alternative Evaluation costs are primarily related to third party advisory services.
[2] | Qdoba Evaluation consulting costs are primarily related to third party advisory services and retention compensation.

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