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Revenue Recognition (Tables) | 6 Months Ended
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Mar. 31, 2025
Revenue from Contract with Customer [Abstract] |
Summary of Disaggregation of Revenue by Major Sources | The following disaggregates our revenue by major sources for the three and six months ended March 31, 2025 and March 31, 2024:
|  | Three Months Ended March 31, |  |  | Six Months Ended March 31, |
(in thousands) |  | 2025 |  | 2024 |  |  | 2025 |  | 2024 |
Petroleum Products: |  |  |  |  |  |  |  |  |  |
Home heating oil and propane |  | $ | 587,878 |  | $ | 508,155 |  |  | $ | 910,718 |  | $ | 859,369 |
Other petroleum products |  |  | 77,227 |  |  | 87,143 |  |  |  | 153,846 |  |  | 184,479 |
Total petroleum products |  |  | 665,105 |  |  | 595,298 |  |  |  | 1,064,564 |  |  | 1,043,848 |
Installations and Services: |  |  |  |  |  |  |  |  |  |
Equipment installations |  |  | 28,882 |  |  | 26,224 |  |  |  | 66,765 |  |  | 60,539 |
Equipment maintenance service contracts |  |  | 31,020 |  |  | 29,386 |  |  |  | 61,975 |  |  | 58,302 |
Billable call services |  |  | 18,038 |  |  | 15,124 |  |  |  | 37,804 |  |  | 31,439 |
Total installations and services |  |  | 77,940 |  |  | 70,734 |  |  |  | 166,544 |  |  | 150,280 |
Total Sales |  | $ | 743,045 |  | $ | 666,032 |  |  | $ | 1,231,108 |  | $ | 1,194,128 |
Summary of Changes in Allowance for Credit Losses | Changes in the allowance for credit losses are as follows:
(in thousands) | Credit Loss Allowance |
Balance at September 30, 2024 | $ | 6,434 |
Current period provision |  | 3,169 |
Write-offs, net and other |  | (2,454 | )
Balance as of March 31, 2025 | $ | 7,149 |

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