Revenue Recognition (Tables)

12 Months Ended

Sep. 30, 2021

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, 2021, 2020 and 2019:

	Years Ended September 30,
(in thousands)	2021		2020		2019
Petroleum Products:
Home heating oil and propane	$	881,526	$	924,421	$	1,099,874
Motor fuel and other petroleum products		322,793		261,605		366,171
Total petroleum products		1,204,319		1,186,026		1,466,045
Installations and Services:
Equipment installations		110,475		101,699		101,709
Equipment maintenance service contracts		118,546		120,388		120,138
Billable call services		63,746		59,345		65,980
Total installations and services		292,767		281,432		287,827
Total Sales	$	1,497,086	$	1,467,458	$	1,753,872

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, 2020	$	6,121
Current period provision		(248	)
Write-offs, net and other		(1,094	)
Balance as of September 30, 2021	$	4,779