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Investment in and Acquisition of Businesses - Summary of Acquisition and Purchase Price Allocation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 25, 2021 | Sep. 26, 2020 | Sep. 28, 2019
North Carolina [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business acquisition, cost of acquired, cash paid | [1],[2] | $ 9,813 |  |
Georgia and California [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business acquisition, cost of acquired, cash paid | [2],[3] |  | $ 27,065 |
Texas, Florida and West Coast [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business acquisition, cost of acquired, cash paid | [2],[4] |  |  | $ 22,850
[1] | Includes an investment in Oberon and one acquisition of a propane retailer located in North Carolina.
[2] | 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.
[3] | Includes an investment in Oberon and two acquisitions of propane retailers located in Georgia and California.
[4] | 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.

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