CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
OPERATING REVENUES
Utility		$ 301,420	$ 317,064	$ 501,385	$ 526,851
Nonutility		564,835	701,979	1,176,637	1,197,497
Total operating revenues		866,255	1,019,043	1,678,022	1,724,348
Gas purchases:
Gas purchases - Utility		138,117	96,586	225,766	174,188
Gas purchases - Nonutility		545,268	621,223	1,080,651	1,066,307
Gas purchases - Related parties		2,144	2,087	4,329	4,236
Operation and maintenance		62,959	56,797	123,061	110,957
Regulatory rider expenses		15,391	19,604	28,023	31,373
Depreciation and amortization		22,311	22,460	44,143	44,314
Energy and other taxes		3,064	21,542	6,305	38,033
Total operating expenses		789,254	840,299	1,512,278	1,469,408
OPERATING INCOME		77,001	178,744	165,744	254,940
Other income, net		2,758	1,028	3,627	7,004
Interest expense, net of capitalized interest		12,509	11,798	25,995	23,703
INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES		67,250	167,974	143,376	238,241
Income tax (benefit) provision		(2,952)	30,901	(9,913)	(19,267)
Equity in earnings of affiliates		3,371	3,193	6,532	6,457
NET INCOME	[1]	$ 73,573	$ 140,266	$ 159,821	$ 263,965
EARNINGS PER COMMON SHARE
Basic (usd per share)		$ 0.83	$ 1.60	$ 1.80	$ 3.02
Diluted (usd per share)	[2]	$ 0.82	$ 1.59	$ 1.79	$ 3.01
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)		88,836	87,595	88,692	87,295
Diluted (in shares)		89,228	87,989	89,093	87,690

[1] Includes income tax benefit related to the Tax Act of $967,000 and $58.5 million, for the three and six months ended March 31, 2018, respectively.

[2] There were no anti-dilutive shares excluded from the calculation of diluted earnings per share during fiscal 2019 and 2018.