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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
OPERATING REVENUES |  |  |  |
Utility |  | $ 731,865 | $ 695,637 | $ 594,346
Nonutility |  | 2,183,244 | 1,572,980 | 1,286,559
Total operating revenues |  | 2,915,109 | 2,268,617 | 1,880,905
Gas purchases: |  |  |  |
Utility |  | 276,005 | 258,687 | 205,034
Nonutility |  | 1,990,832 | 1,436,740 | 1,139,301
Related parties |  | 8,505 | 8,340 | 8,351
Operation and maintenance |  | 266,919 | 226,356 | 208,421
Regulatory rider expenses |  | 38,969 | 40,243 | 39,300
Depreciation and amortization |  | 85,701 | 81,841 | 72,748
Energy and other taxes |  | 52,102 | 49,366 | 40,215
Total operating expenses |  | 2,719,033 | 2,101,573 | 1,713,370
OPERATING INCOME |  | 196,076 | 167,044 | 167,535
Other income, net |  | 16,853 | 14,437 | 9,196
Interest expense, net of capitalized interest |  | 46,286 | 44,886 | 31,044
INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES |  | 166,643 | 136,595 | 145,687
Income tax (benefit) provision |  | (53,785) | 18,343 | 23,530
Equity in earnings of affiliates |  | 13,008 | 13,813 | 9,515
NET INCOME |  | $ 233,436 | $ 132,065 | $ 131,672
EARNINGS PER COMMON SHARE |  |  |  |
Basic (in dollars per share) |  | $ 2.66 | $ 1.53 | $ 1.53
Diluted (in dollars per share) | [1] | $ 2.64 | $ 1.52 | $ 1.52
WEIGHTED AVERAGE SHARES OUTSTANDING |  |  |  |
Basic (in shares) |  | 87,689 | 86,321 | 85,884
Diluted (in shares) |  | 88,315 | 87,144 | 86,731
[1] | There were no anti-dilutive shares excluded from the calculation of diluted earnings per share for fiscal 2018, 2017 and 2016.

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