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Revenue and Accounts Receivable (Tables)
9 Months Ended
Jun. 30, 2022
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue 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 nine months ended June 30, 2022 and 2021.
Three Months Ended June 30, 2022Three Months Ended June 30, 2021
DistributionPipeline and StorageDistributionPipeline and Storage
(In thousands)
Gas sales revenues:
Residential$441,806 $— $336,016 $— 
Commercial231,309 — 157,314 — 
Industrial57,045 — 25,348 — 
Public authority and other13,080 — 8,870 — 
Total gas sales revenues743,240 — 527,548 — 
Transportation revenues27,216 186,405 25,903 164,619 
Miscellaneous revenues2,453 3,104 2,615 3,895 
Revenues from contracts with customers772,909 189,509 556,066 168,514 
Alternative revenue program revenues (1)
(77)(6,097)2,206 (5,527)
Other revenues479 — 478 — 
Total operating revenues$773,311 $183,412 $558,750 $162,987 
Nine Months Ended June 30, 2022Nine Months Ended June 30, 2021
DistributionPipeline and StorageDistributionPipeline and Storage
(In thousands)
Gas sales revenues:
Residential$2,108,349 $— $1,821,570 $— 
Commercial910,400 — 692,443 — 
Industrial160,098 — 81,122 — 
Public authority and other54,668 — 42,159 — 
Total gas sales revenues3,233,515 — 2,637,294 — 
Transportation revenues87,886 514,114 84,643 480,945 
Miscellaneous revenues7,732 11,931 8,336 12,921 
Revenues from contracts with customers3,329,133 526,045 2,730,273 493,866 
Alternative revenue program revenues (1)
25,663 (15,968)(13,666)(16,998)
Other revenues1,483 — 1,467 — 
Total operating revenues$3,356,279 $510,077 $2,718,074 $476,868 
(1)    In our distribution segment, we have weather-normalization adjustment mechanisms that serve to mitigate the effects of weather on our revenue. Additionally, APT has a regulatory mechanism that requires that we share with its tariffed customers 75% of the difference between the total non-tariffed revenues earned during a test period and a regulatorily determined revenue benchmark.
Allowance for Credit Loss Activity Rollforwards of our allowance for uncollectible accounts for the three and nine months ended June 30, 2022 and 2021 are presented in the table below. The allowance excludes the gas cost portion of customers’ bills for approximately 79 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.
 Three Months Ended June 30, 2022
 (In thousands)
Beginning balance, March 31, 2022$62,213 
Current period provisions5,657 
Write-offs charged against allowance(7,430)
Recoveries of amounts previously written off328 
Ending balance, June 30, 2022
$60,768 
 Three Months Ended June 30, 2021
 (In thousands)
Beginning balance, March 31, 2021$44,680 
Current period provisions14,403 
Write-offs charged against allowance(2,875)
Recoveries of amounts previously written off437 
Ending balance, June 30, 2021
$56,645 
 Nine Months Ended June 30, 2022
 (In thousands)
Beginning balance, September 30, 2021
$64,471 
Current period provisions17,733 
Write-offs charged against allowance(22,888)
Recoveries of amounts previously written off1,452 
Ending balance, June 30, 2022
$60,768 
 Nine Months Ended June 30, 2021
 (In thousands)
Beginning balance, September 30, 2020
$29,949 
Current period provisions32,872 
Write-offs charged against allowance(7,544)
Recoveries of amounts previously written off1,368 
Ending balance, June 30, 2021
$56,645