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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 6 Months Ended
Mar. 31, 2025
Accounting Policies [Abstract]  
Schedule of Restricted Cash
The following table provides a reconciliation of cash and cash equivalents and restricted cash reported in the Unaudited Condensed Consolidated Balance Sheets to the total amounts in the Unaudited Condensed Consolidated Statements of Cash Flows as follows:
(Thousands)March 31,
2025		September 30,
2024		March 31,
2024
Balance Sheet
Cash and cash equivalents$83,708 $1,017 $5,036 
Restricted cash in other noncurrent assets$983 $595 $710 
Statements of Cash Flow
Cash, cash equivalents and restricted cash$84,691 $1,612 $5,746 
Schedule of Natural Gas in Storage
The following table summarizes natural gas in storage, at average cost by segment as of:
March 31, 2025September 30, 2024
($ in thousands)Natural Gas in StorageBcfNatural Gas in StorageBcf
NJNG$70,695 10.0 $177,655 30.8 
ES28,666 7.9 21,378 13.1 
S&T155 — 92 — 
Total$99,516 17.9 $199,125 43.9 
Schedule of Software Costs Included in the Consolidated Financial Statements The following tables present the software costs included in the Unaudited Condensed Consolidated Financial Statements:
(Thousands)March 31,
2025		September 30,
2024
Balance Sheets
Utility plant, at cost$133,330 $133,158 
Construction work in progress$50,580 $26,659 
Nonutility plant and equipment, at cost$344 $344 
Accumulated depreciation and amortization, utility plant$(19,170)$(13,632)
Accumulated depreciation and amortization, nonutility plant and equipment$(53)$(48)
Software costs$10,664 $10,522 

Three Months EndedSix Months Ended
March 31,March 31,
Statements of Operations2025202420252024
Operation and maintenance$1,151 $2,674 $3,887 $5,927 
Depreciation and amortization$3,128 $1,265 $5,543 $2,254 
Schedule of Accumulated Other Comprehensive (Loss) Income
The following table presents the changes in the components of accumulated other comprehensive (loss) income, net of related tax effects during the three months ended March 31, 2025 and 2024:
(Thousands)Cash Flow HedgesPostemployment Benefit ObligationTotal
Balance as of December 31, 2024$(5,952)$(501)$(6,453)
Other comprehensive income (loss), net of tax
Amounts reclassified from accumulated other comprehensive loss, net of tax of $(80), $58, $(22), respectively
263 (196)(1)67 
Balance as of March 31, 2025$(5,689)$(697)$(6,386)
Balance as of December 31, 2023$(7,005)$(2,559)$(9,564)
Other comprehensive income, net of tax
Other comprehensive income, before reclassifications, net of tax of $0, $(3,020) and $(3,020), respectively
— 9,992 9,992 
Amounts reclassified from accumulated other comprehensive loss, net of tax of $(80), $112 and $32, respectively
262 (368)(1)(106)
Net current-period other comprehensive income, net of tax of $(80), $(2,908) and $(2,988), respectively
262 9,624 9,886 
Balance as of March 31, 2024$(6,743)$7,065 $322 
(1)Included in the computation of net periodic pension cost, a component of O&M on the Unaudited Condensed Consolidated Statements of Operations.

The following table presents the changes in the components of accumulated other comprehensive (loss) income, net of related tax effects during the six months ended March 31, 2025 and 2024:
(Thousands)Cash Flow HedgesPostemployment Benefit ObligationTotal
Balance as of September 30, 2024$(6,215)$(306)$(6,521)
Other comprehensive income (loss), net of tax
Amounts reclassified from accumulated other comprehensive loss, net of tax of $(159), $116 and $(43), respectively
526 (391)(1)135 
Balance as of March 31, 2025$(5,689)$(697)$(6,386)
Balance as of September 30, 2023$(7,269)$(2,690)$(9,959)
Other comprehensive income, net of tax
Other comprehensive income, before reclassifications, net of tax of $0, $(3,020) and $(3,020), respectively
— 9,992 9,992 
Amounts reclassified from accumulated other comprehensive loss, net of tax of $(159), $72 and $(87), respectively
526 (237)(1)289 
Net current-period other comprehensive income, net of tax of $(159), $(2,948) and $(3,107), respectively
526 9,755 10,281 
Balance as of March 31, 2024$(6,743)$7,065 $322 
(1)Included in the computation of net periodic pension cost, a component of O&M on the Unaudited Condensed Consolidated Statements of Operations.