CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
OPERATING REVENUES
Utility	$ 618,341	$ 462,863	$ 951,768	$ 755,956
Nonutility	294,686	195,050	449,620	369,167
Total operating revenues	913,027	657,913	1,401,388	1,125,123
Natural gas purchases:
Related parties	1,666	1,799	3,384	3,678
Operation and maintenance	111,041	107,223	199,673	201,662
Regulatory rider expenses	48,501	29,229	70,977	48,418
Depreciation and amortization	47,967	40,075	93,296	80,362
Gain on sale of assets	(688)	0	(55,547)	0
Total operating expenses	633,078	487,691	931,862	819,082
OPERATING INCOME	279,949	170,222	469,526	306,041
Other income, net	17,006	15,420	28,623	21,761
Interest expense, net of capitalized interest	32,527	31,621	66,418	63,094
INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES	264,428	154,021	431,731	264,708
Income tax provision	61,593	33,947	98,977	56,883
Equity in earnings of affiliates	1,452	738	2,852	2,398
NET INCOME	$ 204,287	$ 120,812	$ 335,606	$ 210,223
EARNINGS PER COMMON SHARE
Basic (usd per share)	$ 2.04	$ 1.23	$ 3.35	$ 2.14
Diluted (usd per share)	$ 2.02	$ 1.22	$ 3.33	$ 2.13
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	100,291	98,377	100,073	98,123
Diluted (in shares)	100,933	99,102	100,705	98,839
Utility
Natural gas purchases:
Gas purchases - Utility and Nonutility	$ 272,974	$ 204,347	$ 400,654	$ 320,467
Nonutility
Natural gas purchases:
Gas purchases - Utility and Nonutility	$ 151,617	$ 105,018	$ 219,425	$ 164,495