CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
OPERATING REVENUES
Utility	$ 409,901	$ 333,427
Nonutility	194,953	154,934
Total operating revenues	604,854	488,361
Natural gas purchases:
Related parties	1,277	1,718
Operation and maintenance	86,681	88,632
Regulatory rider expenses	33,154	22,476
Depreciation and amortization	49,576	45,329
Gain on sale of assets	0	(54,859)
Total operating expenses	425,646	298,784
OPERATING INCOME	179,208	189,577
Other income, net	11,360	11,617
Interest expense, net of capitalized interest	35,676	33,891
INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES	154,892	167,303
Income tax provision	34,225	37,384
Equity in earnings of affiliates	1,823	1,400
NET INCOME	$ 122,490	$ 131,319
INCOME PER COMMON SHARE
Basic (usd per share)	$ 1.22	$ 1.32
Diluted (usd per share)	$ 1.21	$ 1.31
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	100,701	99,855
Diluted (in shares)	101,229	100,478
Utility
Natural gas purchases:
Natural gas purchases	$ 169,104	$ 127,680
Nonutility
Natural gas purchases:
Natural gas purchases	$ 85,854	$ 67,808