Revenue and Accounts Receivable (Tables)

6 Months Ended

Mar. 31, 2025

Revenue from Contract with Customer [Abstract]

The following tables disaggregate our revenue from contracts with customers by customer type and segment and provide a reconciliation to total operating revenues, including intersegment revenues, for the three and six months ended March 31, 2025 and 2024.


	Three Months Ended March 31, 2025				Three Months Ended March 31, 2024
	Distribution		Pipeline and Storage		Distribution		Pipeline and Storage
	(In thousands)
Gas sales revenues:
Residential	$	1,308,691	$	—	$	1,065,296	$	—
Commercial	480,108		—		404,701		—
Industrial	38,885		—		30,419		—
Public authority and other	23,921		—		21,120		—
Total gas sales revenues	1,851,605		—		1,521,536		—
Transportation revenues	43,352		266,514		37,607		223,159
Miscellaneous revenues	4,222		4,259		3,724		2,162
Revenues from contracts with customers	1,899,179		270,773		1,562,867		225,321
Alternative revenue program revenues	(20,117)		(11,774)		22,315		(1,834)
Other revenues	3,466		—		3,999		—
Total operating revenues	$	1,882,528	$	258,999	$	1,589,181	$	223,487



	Six Months Ended March 31, 2025				Six Months Ended March 31, 2024
	Distribution		Pipeline and Storage		Distribution		Pipeline and Storage
	(In thousands)
Gas sales revenues:
Residential	$	2,001,741	$	—	$	1,792,978	$	—
Commercial	746,162		—		681,954		—
Industrial	65,206		—		58,650		—
Public authority and other	36,802		—		35,704		—
Total gas sales revenues	2,849,911		—		2,569,286		—
Transportation revenues	80,079		532,543		71,374		438,464
Miscellaneous revenues	7,244		6,923		6,367		5,204
Revenues from contracts with customers	2,937,234		539,466		2,647,027		443,668
Alternative revenue program revenues	47,219		(25,077)		39,716		(9,012)
Other revenues	7,410		—		7,776		—
Total operating revenues	$	2,991,863	$	514,389	$	2,694,519	$	434,656

Schedule of Allowance for Credit Loss Activity

Rollforwards of our allowance for uncollectible accounts for the three and six months ended March 31, 2025 and 2024 are presented in the table below. The allowance excludes the gas cost portion of customers’ bills for approximately 89 percent of our customers as we have the ability to collect these gas costs through our gas cost recovery mechanisms in most of our jurisdictions.

In December 2023, the Mississippi Public Service Commission approved the recovery of uncollectible accounts through our purchased gas cost mechanism over a two-year period rather than through our annual filing mechanism over a one-year period. As a result of this decision, we recorded a $13.9 million reduction to bad debt expense during the first quarter of fiscal 2024. Of this amount, $9.7 million represents future recovery of customer receivables previously written off since April 2022 but not yet recovered through our rates. This amount increased our deferred gas cost regulatory asset. The remaining $4.2 million reduction represents a reversal of our allowance for uncollectible accounts for customer balances that have not yet been written off.


	Three Months Ended March 31, 2025
	(In thousands)
Beginning balance, December 31, 2024	$	39,166
Current period provisions	14,391
Write-offs charged against allowance	(4,761)
Recoveries of amounts previously written off	545

Ending balance, March 31, 2025	$	49,341


	Three Months Ended March 31, 2024
	(In thousands)
Beginning balance, December 31, 2023	$	35,406
Current period provisions	12,797
Write-offs charged against allowance	(5,859)
Recoveries of amounts previously written off	361

Ending balance, March 31, 2024	$	42,705



	Six Months Ended March 31, 2025
	(In thousands)
Beginning balance, September 30, 2024	$	37,056
Current period provisions	23,015
Write-offs charged against allowance	(12,209)
Recoveries of amounts previously written off	1,479

Ending balance, March 31, 2025	$	49,341



	Six Months Ended March 31, 2024
	(In thousands)
Beginning balance, September 30, 2023	$	40,840
Current period provisions	19,547
Write-offs charged against allowance	(14,616)
Recoveries of amounts previously written off	1,126
Mississippi recovery of uncollectible accounts	(4,192)
Ending balance, March 31, 2024	$	42,705