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LEASES (Tables)
 9 Months Ended
Jun. 30, 2025
Leases [Abstract]  
Schedule of Lease, Cost
The following table presents the Company's lease costs included in the Unaudited Condensed Consolidated Statements of Operations:
Three Months EndedNine Months Ended
June 30,June 30,
(Thousands)Income Statement Location2025202420252024
Operating lease cost (1)
Operation and maintenance$2,830 $2,595 $8,350 $7,659 
Finance lease cost
Amortization of right-of-use assetsDepreciation and amortization382 540 1,304 1,620 
Interest on lease liabilitiesInterest expense, net of capitalized interest147 222 492 710 
Total finance lease cost529 762 1,796 2,330 
Variable lease costOperation and maintenance227 105 611 551 
Total lease cost$3,586 $3,462 $10,757 $10,540 
(1)Net of capitalized costs.

The following table presents supplemental cash flow information related to leases:
Nine Months Ended
June 30,
(Thousands)20252024
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows for operating leases$6,666 $5,947 
Operating cash flows for finance leases$492 $710 
Financing cash flows for finance leases$6,249 $5,820 
Schedule of Assets and Liabilities, Lessee
The following table presents the balance and classifications of the Company's right of use assets and lease liabilities included in the Unaudited Condensed Consolidated Balance Sheets:
(Thousands)Balance Sheet LocationJune 30,
2025		September 30,
2024
Assets
Noncurrent
Operating lease assetsOperating lease assets$191,851 $184,485 
Finance lease assetsUtility plant24,784 26,088 
Total lease assets$216,635 $210,573 
Liabilities
Current
Operating lease liabilitiesOperating lease liabilities$6,006 $4,945 
Finance lease liabilitiesCurrent maturities of long-term debt6,278 7,534 
Noncurrent
Operating lease liabilitiesOperating lease liabilities168,645 159,303 
Finance lease liabilitiesLong-term debt10,980 16,026 
Total lease liabilities$191,909 $187,808