CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
OPERATING REVENUES
Utility	$ 209,787	$ 185,556
Nonutility	495,518	355,472
Total operating revenues	705,305	541,028
OPERATING EXPENSES
Gas purchases - Utility	77,602	61,320
Gas purchases - Nonutility	445,084	337,932
Gas purchases - Related parties	2,149	2,111
Operation and maintenance	55,111	52,228
Regulatory rider expenses	11,769	12,601
Depreciation and amortization	21,854	19,260
Energy and other taxes	16,491	14,101
Total operating expenses	630,060	499,553
OPERATING INCOME	75,245	41,475
Other income, net	6,927	3,776
Interest expense, net of capitalized interest	11,905	10,615
INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES	70,267	34,636
Income tax (benefit) provision	(50,168)	2,018
Equity in earnings of affiliates	3,264	2,311
NET INCOME	$ 123,699	$ 34,929
EARNINGS PER COMMON SHARE
Basic (usd per share)	$ 1.42	$ 0.41
Diluted (usd per share)	1.42	0.40
DIVIDENDS DECLARED PER COMMON SHARE (usd per share)	$ 0.2725	$ 0.255
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	86,996	86,084
Diluted (in shares)	87,347	86,855