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Acquisition and Disposition of Businesses - Additional Information (Details) |  |  |  |  |  |  | 3 Months Ended | 4 Months Ended | 6 Months Ended | 8 Months Ended | 11 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 26, 2019 USD ($) | Jun. 12, 2019 USD ($) | Feb. 06, 2019 USD ($) | Apr. 05, 2018 USD ($) | Dec. 08, 2017 USD ($) | Nov. 07, 2017 USD ($) | Dec. 30, 2017 USD ($) | Sep. 28, 2019 USD ($) | Sep. 29, 2018 USD ($) | Sep. 28, 2019 USD ($) | Sep. 29, 2018 USD ($) | Sep. 28, 2019 USD ($) | Sep. 29, 2018 USD ($) | Sep. 30, 2017 USD ($)
Business Acquisition And Dispositions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, cost of acquired, cash paid | $ 8,000,000 | $ 2,850,000 | $ 12,000,000 | $ 11,900,000 |  | $ 4,871,000 |  |  |  |  |  |  |  |
Cash paid to acquire business | 5,509,000 |  |  |  |  |  |  | $ 2,426,000 | $ 10,622,000 | $ 11,365,000 | $ 4,251,000 | $ 19,300,000 | $ 14,873,000 | $ 0
Business acquisition, cost of acquired, shares issued | 1,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of propane assets and operations acquired |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Business disposition, sales price |  |  |  |  | $ 2,800,000 |  |  |  |  |  |  |  |  |
(Loss) gain on sale of business |  |  |  |  |  |  | $ (4,823,000) |  |  |  |  | $ 0 | $ (4,823,000) | $ 0
Non-compete Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition And Dispositions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, cost of acquired, cash paid | $ 650,000 | $ 450,000 | $ 800,000 | $ 1,750,000 |  | $ 750,000 |  |  |  |  |  |  |  |

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- Definition Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477 + Details
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- Definition Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684 + Details
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