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Investment in and Acquisition and Disposition of Businesses - Summary of Acquisition and Purchase Price Allocation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 26, 2020 | Sep. 28, 2019 | Sep. 29, 2018
Georgia and California [Member] |  |  |  |
Business Acquisition And Dispositions [Line Items] |  |  |  |
Business acquisition, cost of acquired, cash paid | [1],[2] | $ 27,065 |  |
Texas, Florida and West Coast [Member] |  |  |  |
Business Acquisition And Dispositions [Line Items] |  |  |  |
Business acquisition, cost of acquired, cash paid | [1],[3] |  | $ 22,850 |
Florida and California [Member] |  |  |  |
Business Acquisition And Dispositions [Line Items] |  |  |  |
Business acquisition, cost of acquired, cash paid | [1],[4] |  |  | $ 16,771
[1] | Total consideration includes non-compete consideration, which will be paid over the respective non-compete periods subject to compliance with the terms of the respective agreements, and excludes working capital adjustments.
[2] | Includes the investment in Oberon and two acquisitions of propane retailers located in Georgia and California.
[3] | Includes three acquisitions of propane retailers located in Texas, Florida and the West Coast. Total consideration includes the issuance of $1,600 in Common Units.
[4] | Includes two acquisitions of propane retailers located in Florida and California.

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