CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
OPERATING REVENUES
Utility	$ 199,357	$ 127,626	$ 937,266	$ 633,522
Nonutility	352,978	239,967	1,203,227	990,563
Total operating revenues	552,335	367,593	2,140,493	1,624,085
Natural gas purchases:
Related parties	1,838	1,699	5,567	5,163
Operation and maintenance	88,373	81,878	243,143	265,779
Regulatory rider expenses	8,360	5,456	55,941	34,570
Depreciation and amortization	32,872	27,767	94,700	81,977
Total operating expenses	522,526	395,049	1,814,924	1,338,853
OPERATING INCOME (LOSS)	29,809	(27,456)	325,569	285,232
Other income, net	4,288	4,817	12,551	13,941
Interest expense, net of capitalized interest	21,411	18,744	59,814	58,683
INCOME (LOSS) BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES	12,686	(41,383)	278,306	240,490
Income tax provision (benefit)	4,434	(18,785)	64,051	37,713
Equity in earnings (loss) of affiliates	4,801	(89,233)	6,145	(83,754)
NET INCOME (LOSS)	$ 13,053	$ (111,831)	$ 220,400	$ 119,023
EARNINGS (LOSS) PER COMMON SHARE
Basic (usd per share)	$ 0.14	$ (1.16)	$ 2.29	$ 1.24
Diluted (usd per share)	$ 0.14	$ (1.16)	$ 2.28	$ 1.23
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	96,154	96,348	96,055	96,237
Diluted (in shares)	96,620	96,348	96,527	96,629
Regulated
Natural gas purchases:
Gas purchases - Utility and Nonutility	$ 100,277	$ 41,785	$ 435,438	$ 211,165
Unregulated
Natural gas purchases:
Gas purchases - Utility and Nonutility	$ 290,806	$ 236,464	$ 980,135	$ 740,199