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Business Combinations and Divestitures - Additional Information (Detail) $ in Millions |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 27, 2020 USD ($) | Dec. 31, 2020 USD ($) PartnershipUnit | Sep. 30, 2022 USD ($) PartnershipUnit
Propane Assets |  |  |
Business Acquisition [Line Items] |  |  |
Cash proceeds from sale of assets | $ 6.1 |  |
Heating Oil Dealers | Scenario Forecast |  |  |
Business Acquisition [Line Items] |  |  |
Number of businesses acquired | PartnershipUnit |  |  | 3
Aggregate purchase price partnership acquired |  |  | $ 4.2
Cash paid |  |  | 3.3
Deferred liabilities |  |  | 0.9
Aggregate purchase price allocation, intangible assets |  |  | 2.9
Aggregate purchase price allocation, fixed assets |  |  | 2.1
Gross purchase price increased (reduced) by working capital credits |  |  | $ (0.8)
Propane Dealers |  |  |
Business Acquisition [Line Items] |  |  |
Number of businesses acquired | PartnershipUnit |  | 2 |
Aggregate purchase price partnership acquired |  | $ 37.9 |
Cash paid |  | 37.1 |
Deferred liabilities |  | 0.8 |
Aggregate purchase price allocation, intangible assets |  | 32.7 |
Aggregate purchase price allocation, fixed assets |  | 5.7 |
Gross purchase price increased (reduced) by working capital credits |  | $ (0.5) |

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