CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
OPERATING REVENUES
Utility	$ 274,435	$ 195,729
Nonutility	401,407	258,576
Total operating revenues	675,842	454,305
Natural gas purchases:
Gas purchases - Related parties	1,846	1,734
Operation and maintenance	68,984	73,636
Regulatory rider expenses	16,671	10,701
Depreciation and amortization	30,393	27,362
Total operating expenses	518,957	342,825
OPERATING INCOME	156,885	111,480
Other income, net	4,136	4,117
Interest expense, net of capitalized interest	19,477	19,786
INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES	141,544	95,811
Income tax provision	30,807	17,441
Equity in earnings of affiliates	575	2,675
NET INCOME	$ 111,312	$ 81,045
EARNINGS PER COMMON SHARE
Basic (usd per share)	$ 1.16	$ 0.84
Diluted (usd per share)	$ 1.16	$ 0.84
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	95,944	96,114
Diluted (in shares)	96,356	96,415
Regulated
Natural gas purchases:
Gas purchases - Utility and Nonutility	$ 122,269	$ 56,145
Unregulated
Natural gas purchases:
Gas purchases - Utility and Nonutility	$ 278,794	$ 173,247