CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
OPERATING REVENUES
Utility	$ 710,793	$ 731,865	$ 695,637
Nonutility	1,881,252	2,183,244	1,572,980
Total operating revenues	2,592,045	2,915,109	2,268,617
Gas purchases:
Related parties	7,948	8,505	8,340
Operation and maintenance	256,951	263,113	222,176
Regulatory rider expenses	33,937	38,969	40,243
Depreciation and amortization	91,730	85,701	81,841
Energy and other taxes	11,190	52,102	49,366
Total operating expenses	2,438,110	2,715,227	2,097,393
OPERATING INCOME	153,935	199,882	171,224
Other income, net	11,273	13,047	10,257
Interest expense, net of capitalized interest	47,082	46,286	44,886
INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES	118,126	166,643	136,595
Income tax (benefit) provision	(37,751)	(53,785)	18,343
Equity in earnings of affiliates	13,628	13,008	13,813
NET INCOME	$ 169,505	$ 233,436	$ 132,065
EARNINGS PER COMMON SHARE
Basic (in dollars per share)	$ 1.90	$ 2.66	$ 1.53
Diluted (in dollars per share)	$ 1.89	$ 2.64	$ 1.52
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	89,242	87,689	86,321
Diluted (in shares)	89,616	88,315	87,144
Utility
Gas purchases:
Gas purchases	$ 320,256	$ 276,005	$ 258,687
Nonutility
Gas purchases:
Gas purchases	$ 1,716,098	$ 1,990,832	$ 1,436,740