Revenue Recognition (Tables)

12 Months Ended

Sep. 30, 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 years ended September 30, 2025, 2024 and 2023:

	Years Ended September 30,
(in thousands)	2025		2024		2023
Petroleum Products:
Home heating oil and propane	$	1,119,777	$	1,081,985	$	1,202,194
Motor fuel and other petroleum products		317,824		366,807		448,547
Total petroleum products		1,437,601		1,448,792		1,650,741
Installations and Services:
Equipment installations		135,149		123,493		114,756
Equipment maintenance service contracts		136,042		129,478		126,887
Billable call services		75,626		64,336		60,478
Total installations and services		346,817		317,307		302,121
Total Sales	$	1,784,418	$	1,766,099	$	1,952,862

Summary of Changes in Allowance for Credit Losses

Changes in the allowance for credit losses are as follows:

(in thousands)	Credit Loss Allowance
Balance as of September 30, 2024	$	6,434
Current period provision		6,879
Write-offs, net and other		(6,117	)
Balance as of September 30, 2025	$	7,196