CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
OPERATING REVENUES
Utility	$ 128,532	$ 120,782	$ 645,375	$ 622,167
Nonutility	170,442	314,160	908,249	1,490,797
Total operating revenues	298,974	434,942	1,553,624	2,112,964
Gas purchases:
Gas purchases - Related parties	1,518	2,126	4,548	6,455
Operation and maintenance	68,541	64,932	198,718	194,298
Regulatory rider expenses	5,464	4,136	32,536	32,159
Depreciation and amortization	31,216	23,149	89,758	67,292
Total operating expenses	319,165	438,961	1,377,103	1,951,239
OPERATING (LOSS) INCOME	(20,191)	(4,019)	176,521	161,725
Other income, net	2,713	1,829	10,260	5,456
Interest expense, net of capitalized interest	15,144	11,648	50,417	37,643
(LOSS) INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES	(32,622)	(13,838)	136,364	129,538
Income tax benefit	(2,190)	(1,941)	(4,092)	(11,854)
Equity in earnings of affiliates	3,213	3,495	10,191	10,027
NET (LOSS) INCOME	$ (27,219)	$ (8,402)	$ 150,647	$ 151,419
EARNINGS PER COMMON SHARE
Basic (usd per share)	$ (0.28)	$ (0.09)	$ 1.60	$ 1.70
Diluted (usd per share)	$ (0.28)	$ (0.09)	$ 1.59	$ 1.69
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	95,764	89,600	94,420	88,995
Diluted (in shares)	95,764	89,600	94,718	89,402
Regulated
Gas purchases:
Gas purchases - Utility and Nonutility	$ 45,665	$ 54,861	$ 249,042	$ 280,627
Unregulated
Gas purchases:
Gas purchases - Utility and Nonutility	$ 166,761	$ 289,757	$ 802,501	$ 1,370,408