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LEASES (Tables)
 9 Months Ended
Jun. 30, 2021
Leases [Abstract]  
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 Location2021202020212020
Operating lease cost (1)
Operation and maintenance$2,366 1,650 5,811 4,761 
Finance lease cost
Amortization of right-of-use assetsDepreciation and amortization$640 $1,274 $3,077 $3,734 
Interest on lease liabilitiesInterest expense, net of capitalized interest193 248 527 796 
Total finance lease cost833 1,522 3,604 4,530 
Short-term lease costOperation and maintenance127 95 381 721 
Variable lease costOperation and maintenance262 597 964 1,707 
Total lease cost$3,588 $3,864 $10,760 $11,719 
(1)Net of capitalized costs.

The following table presents supplemental cash flow information related to leases:
Nine Months Ended
June 30,
(Thousands)20212020
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows for operating leases$4,539 $4,133 
Operating cash flows for finance leases$984 $952 
Financing cash flows for finance leases$6,930 $5,505 
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,
2021		September 30, 2020
Assets
Noncurrent
Operating lease assetsOperating lease assets$142,753 $131,769 
Finance lease assetsUtility plant13,853 71,085 
Total lease assets$156,606 $202,854 
Liabilities
Current
Operating lease liabilitiesOperating lease liabilities$4,588 $6,724 
Finance lease liabilitiesCurrent maturities of long-term debt5,625 10,416 
Noncurrent
Operating lease liabilitiesOperating lease liabilities109,993 95,030 
Finance lease liabilitiesLong-term debt15,761 63,743 
Total lease liabilities$135,967 $175,913