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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2020 | Mar. 31, 2019
OPERATING REVENUES |  |  |  |
Utility | $ 297,220 | $ 301,420 | $ 516,843 | $ 501,385
Nonutility | 342,394 | 564,835 | 737,807 | 1,176,637
Total operating revenues | 639,614 | 866,255 | 1,254,650 | 1,678,022
Gas purchases: |  |  |  |
Gas purchases - Related parties | 1,506 | 2,144 | 3,030 | 4,329
Operation and maintenance | 66,832 | 66,023 | 130,177 | 129,366
Regulatory rider expenses | 15,330 | 15,391 | 27,072 | 28,023
Depreciation and amortization | 30,784 | 22,311 | 58,542 | 44,143
Total operating expenses | 544,399 | 789,254 | 1,057,938 | 1,512,278
OPERATING INCOME | 95,215 | 77,001 | 196,712 | 165,744
Other income, net | 7,261 | 2,758 | 7,547 | 3,627
Interest expense, net of capitalized interest | 19,203 | 12,509 | 35,273 | 25,995
INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF AFFILIATES | 83,273 | 67,250 | 168,986 | 143,376
Income tax benefit | (1,643) | (2,952) | (1,902) | (9,913)
Equity in earnings of affiliates | 3,589 | 3,371 | 6,978 | 6,532
NET INCOME | $ 88,505 | $ 73,573 | $ 177,866 | $ 159,821
EARNINGS PER COMMON SHARE |  |  |  |
Basic (usd per share) | $ 0.93 | $ 0.83 | $ 1.90 | $ 1.80
Diluted (usd per share) | $ 0.92 | $ 0.82 | $ 1.89 | $ 1.79
WEIGHTED AVERAGE SHARES OUTSTANDING |  |  |  |
Basic (in shares) | 95,584 | 88,836 | 93,747 | 88,692
Diluted (in shares) | 95,890 | 89,228 | 94,073 | 89,093
Regulated |  |  |  |
Gas purchases: |  |  |  |
Gas purchases - Utility and Nonutility | $ 111,563 | $ 138,117 | $ 203,377 | $ 225,766
Unregulated |  |  |  |
Gas purchases: |  |  |  |
Gas purchases - Utility and Nonutility | $ 318,384 | $ 545,268 | $ 635,740 | $ 1,080,651

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