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Acquisitions - Additional Information (Details) |  |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
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Aug. 15, 2023 USD ($) Store Sites | Jun. 06, 2023 USD ($) Sites Store | Mar. 01, 2023 USD ($) Sites | Dec. 06, 2022 USD ($) StoresAndGasStation | Sep. 30, 2023 USD ($) Sites | Mar. 31, 2023 USD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) Sites | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) | Jun. 30, 2023 Dealer Store | Jul. 22, 2022 Dealer Cardlock
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of sites leased | Sites |  |  | 104 |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 278,261,000 |  |  | $ 278,261,000 |  | $ 217,297,000 |  |
Number of convenience stores | Store |  | 24 |  |  |  |  |  |  |  |  |  |
Number of cardlock sites acquired | Cardlock |  |  |  |  |  |  |  |  |  |  |  | 184
Number Of Dealer Locations Acquired | Dealer |  |  |  |  |  |  |  |  |  |  |  | 46
Oak Street [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of sites leased | Sites | 3 | 33 |  |  | 4 |  |  | 4 |  |  |  |
Right-of-use assets under operating leases | $ 8,800,000 | $ 49,000,000 | $ 131,300,000 |  |  |  |  |  |  |  |  |
Financial Liability |  | $ 28,800,000 | $ 51,600,000 |  |  |  |  |  |  |  |  |
Business combination purchase price | 10,300,000 |  |  |  |  |  |  |  |  |  |  |
Transit Energy Group [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition agreement |  |  | Mar. 01, 2023 |  |  |  |  |  |  |  |  |
Goodwill |  |  | $ 57,319,000 |  |  |  |  |  |  |  |  |
Right-of-use assets under operating leases |  |  | 69,254,000 |  |  |  |  |  |  |  |  |
Acquisition related cost recognized as other (income) expenses |  |  |  |  | $ 400,000 |  |  | $ 3,300,000 |  |  |  |
Consideration paid in cash |  |  | 385,504,000 |  |  |  | $ 300,000 |  | $ 300,000 |  |  |
Revenue through closing date of acquisition till period end date |  |  |  |  | 247,200,000 |  |  | 564,300,000 |  |  |  |
Net loss through acquisition date till period end date |  |  |  |  | 400,000 |  |  | $ (2,300,000) |  |  |  |
Number of convenience stores | Store |  |  |  |  |  |  |  |  |  |  | 135 |
Number of dealer locations to be acquired | Dealer |  |  |  |  |  |  |  |  |  |  | 181 |
Business combination purchase price |  |  | 370,000,000 |  |  |  |  |  |  |  |  |
Deferred consideration |  |  | 50,000,000 |  |  |  |  |  |  |  |  |
Deferred consideration annual installment amount |  |  | 25,000,000 |  |  |  |  |  |  |  |  |
Business Combination Non Deferred Consideration |  |  | 81,700,000 |  |  |  |  |  |  |  |  |
Business combination liabilities incurred |  |  | 55,000,000 |  |  |  |  |  |  |  |  |
Property and equipment |  |  | 268,660,000 |  |  |  |  |  |  |  |  |
Other liabilities |  |  | 2,087,000 |  |  |  |  |  |  |  |  |
Deferred tax asset |  |  | 19,135,000 |  |  |  |  |  |  |  |  |
Transit Energy Group [Member] | Wholesale Fuel Supply Contracts |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Useful life of the contracts |  |  |  |  |  |  |  | 5 years |  |  |  |
Transit Energy Group [Member] | Brand Name [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Useful life of the contracts |  |  |  |  |  |  |  | 5 years |  |  |  |
WTG Fuels Holdings [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition agreement |  | Jun. 06, 2023 |  |  |  |  |  |  |  |  |  |
Business combination number of private cardlocksites acquired | Sites |  | 43 |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ 0 |  |  |  |  |  |  |  |  |  |
Right-of-use assets under operating leases |  | 1,812,000 |  |  |  |  |  |  |  |  |  |
Acquisition related cost recognized as other (income) expenses |  |  |  |  | 100,000 |  |  | $ 2,200,000 |  |  |  |
Consideration paid in cash |  | 145,712,000 |  |  |  |  | $ 0 |  | $ 0 |  |  |
Revenue through closing date of acquisition till period end date |  |  |  |  | 54,000,000 |  |  | 68,900,000 |  |  |  |
Net loss through acquisition date till period end date |  |  |  |  | (400,000) |  |  | $ (600,000) |  |  |  |
Business combination purchase price, plus value of inventory |  | 140,000,000 |  |  |  |  |  |  |  |  |  |
Business combination liabilities incurred |  | 19,200,000 |  |  |  |  |  |  |  |  |  |
Business combination consideration transferred |  | $ 29,900,000 |  |  |  |  |  |  |  |  |  |
Business Combination Number Of fleet fueling CardlockSitesAcquired | Sites |  | 68 |  |  |  |  |  |  |  |  |  |
Property and equipment |  | $ 128,396,000 |  |  |  |  |  |  |  |  |  |
Other liabilities |  | 598,000 |  |  |  |  |  |  |  |  |  |
WTG Fuels Holdings [Member] | Customer Relationships | Fueling sites |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Useful life of the contracts |  |  |  |  |  |  |  | 5 years |  |  |  |
Pride Convenience Holdings, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of convenience stores | StoresAndGasStation |  |  |  | 31 |  |  |  |  |  |  |  |
Property and equipment |  |  |  | $ 4,700,000 |  |  |  |  |  |  |  |
Accounts Payable |  |  |  | 1,000,000 |  |  |  |  |  |  |  |
Other liabilities |  |  |  | 1,000,000 |  |  |  |  |  |  |  |
Deferred tax asset |  |  |  | 1,000,000 |  |  |  |  |  |  |  |
Goodwill, period increase (decrease) |  |  |  | 3,100,000 |  |  |  |  |  |  |  |
Depreciation and amortization expenses |  |  |  |  |  | $ 600,000 |  |  |  | $ 200,000 |  |
Capital One Line of credit [Member] | Transit Energy Group [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business combination liabilities incurred |  |  | $ 55,000,000 |  |  |  |  |  |  |  |  |
Capital One Line of credit [Member] | WTG Fuels Holdings [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business combination liabilities incurred |  | $ 19,200,000 |  |  |  |  |  |  |  |  |  |
Third Party [Member] | Oak Street [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business combination purchase price | $ 10,400,000 |  |  |  |  |  |  |  |  |  |  |
Third Party [Member] | Speedy Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of convenience stores | Store | 7 |  |  |  |  |  |  |  |  |  |  |
Business combination purchase price | $ 13,700,000 |  |  |  |  |  |  |  |  |  |  |
GPM Petroleum L P [Member] | Transit Energy Group [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 57,300,000 |  |  | $ 57,300,000 |  |  |  |
GPM Petroleum L P [Member] | Pride Convenience Holdings, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, period increase (decrease) |  |  |  | $ 400,000 |  |  |  |  |  |  |  |

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