CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
OPERATING REVENUES
Utility	$ 357,409	$ 274,435
Nonutility	366,158	401,407
Total operating revenues	723,567	675,842
Natural gas purchases:
Related parties	1,827	1,846
Operation and maintenance	79,501	68,984
Regulatory rider expenses	18,251	16,671
Depreciation and amortization	36,683	30,393
Total operating expenses	550,778	518,957
OPERATING INCOME	172,789	156,885
Other income, net	4,655	4,136
Interest expense, net of capitalized interest	29,491	19,477
INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES	147,953	141,544
Income tax provision	32,978	30,807
Equity in earnings of affiliates	946	575
NET INCOME	$ 115,921	$ 111,312
EARNINGS PER COMMON SHARE
Basic (usd per share)	$ 1.20	$ 1.16
Diluted (usd per share)	$ 1.19	$ 1.16
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	96,485	95,944
Diluted (in shares)	97,083	96,356
Utility
Natural gas purchases:
Gas purchases - Utility and Nonutility	$ 182,446	$ 122,269
Nonutility
Natural gas purchases:
Gas purchases - Utility and Nonutility	$ 232,070	$ 278,794