CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
OPERATING REVENUES
Utility	$ 121,362	$ 119,206	$ 602,464	$ 513,348
Nonutility	336,161	274,007	1,129,633	898,316
Total operating revenues	457,523	393,213	1,732,097	1,411,664
OPERATING EXPENSES
Gas Purchases - Utility	47,124	45,700	220,889	174,739
Gas Purchases - Nonutility	299,971	288,510	1,005,231	830,481
Gas Purchases - Related parties	2,076	2,108	6,259	6,259
Operation and maintenance	55,613	51,467	160,183	150,825
Regulatory rider expenses	5,216	6,360	37,710	37,203
Depreciation and amortization	20,760	18,671	60,348	52,897
Energy and other taxes	8,796	8,726	42,382	34,205
Total operating expenses	439,556	421,542	1,533,002	1,286,609
OPERATING INCOME (LOSS)	17,967	(28,329)	199,095	125,055
Other income, net	3,273	2,306	12,387	6,432
Interest expense, net of capitalized interest	11,164	7,787	33,215	21,933
INCOME (LOSS) BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES	10,076	(33,810)	178,267	109,554
Income tax (benefit) provision	(5,816)	(14,190)	20,134	10,347
Equity in earnings of affiliates	3,065	2,257	10,455	7,065
NET INCOME (LOSS)	$ 18,957	$ (17,363)	$ 168,588	$ 106,272
EARNINGS (LOSS) PER COMMON SHARE
Basic (usd per share)	$ 0.22	$ (0.20)	$ 1.95	$ 1.24
Diluted (usd per share)	0.22	(0.20)	1.94	1.23
DIVIDENDS DECLARED PER COMMON SHARE (usd per share)	$ 0.255	$ 0.24	$ 0.765	$ 0.72
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	86,408	85,960	86,257	85,823
Diluted (in shares)	87,267	85,960	87,088	86,691