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Revenue Recognition (Tables) | 12 Months Ended
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Sep. 30, 2022
Revenue from Contract with Customer [Abstract] |
Summary of Disaggregation of Revenue by Major Sources | The following disaggregates our revenue by major sources for the years ended September 30, 2022, 2021 and 2020:
| Years Ended September 30, |
(in thousands) | 2022 |  |  | 2021 |  |  | 2020 |
Petroleum Products: |  |  |  |  |  |  |  |
Home heating oil and propane | $ | 1,170,552 |  |  | $ | 881,526 |  |  | $ | 924,421 |
Motor fuel and other petroleum products |  | 527,729 |  |  |  | 322,793 |  |  |  | 261,605 |
Total petroleum products |  | 1,698,281 |  |  |  | 1,204,319 |  |  |  | 1,186,026 |
Installations and Services: |  |  |  |  |  |  |  |
Equipment installations |  | 121,023 |  |  |  | 110,475 |  |  |  | 101,699 |
Equipment maintenance service contracts |  | 121,623 |  |  |  | 118,546 |  |  |  | 120,388 |
Billable call services |  | 65,631 |  |  |  | 63,746 |  |  |  | 59,345 |
Total installations and services |  | 308,277 |  |  |  | 292,767 |  |  |  | 281,432 |
Total Sales | $ | 2,006,558 |  |  | $ | 1,497,086 |  |  | $ | 1,467,458 |
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, 2021 | $ | 4,779 |
Current period provision |  | 5,411 |
Write-offs, net and other |  | (2,435 | )
Balance as of September 30, 2022 | $ | 7,755 |

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