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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Operating revenues | $ 1,484,009 | $ 1,012,786
Purchased gas cost | 738,249 | 371,163
Operation and maintenance expense | 185,016 | 159,110
Depreciation and amortization expense | 146,020 | 127,856
Taxes, other than income | 93,538 | 78,796
Operating income | 321,186 | 275,861
Other non-operating income | 21,191 | 8,702
Interest charges | 36,760 | 19,851
Income before income taxes | 305,617 | 264,712
Income tax expense | 33,757 | 15,503
Net income | $ 271,860 | $ 249,209
Basic net income per share (USD per share) | $ 1.92 | $ 1.86
Diluted net income per share (USD per share) | 1.91 | 1.86
Cash dividends (USD per share) | $ 0.74 | $ 0.68
Basic weighted average shares outstanding (in shares) | 141,820 | 133,682
Diluted weighted average shares outstanding (in shares) | 141,937 | 133,689
Other comprehensive income (loss), net of tax |  |
Net unrealized holding gains (losses) on available-for-sale securities, net of tax of $25 and $(20) | $ 87 | $ (69)
Cash flow hedges: |  |
Amortization and unrealized gains (losses) on interest rate agreements, net of tax of $6,397 and $(13,260) | 22,131 | (45,878)
Total other comprehensive income (loss) | 22,218 | (45,947)
Total comprehensive income | 294,078 | 203,262
Distribution segment |  |
Operating revenues | 1,439,693 | 971,636
Pipeline and storage segment |  |
Operating revenues | 44,316 | 41,150
Purchased gas cost |  |
Purchased gas cost | 738,249 | 371,163
Operating Segments | Distribution segment |  |
Operating revenues | 1,440,426 | 972,422
Purchased gas cost | 881,915 | 496,799
Operation and maintenance expense | 136,469 | 123,284
Depreciation and amortization expense | 105,664 | 92,797
Taxes, other than income | 84,622 | 69,045
Operating income | 231,756 | 190,497
Other non-operating income | 6,774 | 1,916
Interest charges | 22,839 | 8,548
Income before income taxes | 215,691 | 183,865
Income tax expense | 21,223 | 4,294
Net income | 194,468 | 179,571
Operating Segments | Pipeline and storage segment |  |
Operating revenues | 186,629 | 162,918
Purchased gas cost | (858) | (3,411)
Operation and maintenance expense | 48,785 | 36,155
Depreciation and amortization expense | 40,356 | 35,059
Taxes, other than income | 8,916 | 9,751
Operating income | 89,430 | 85,364
Other non-operating income | 14,417 | 6,786
Interest charges | 13,921 | 11,303
Income before income taxes | 89,926 | 80,847
Income tax expense | 12,534 | 11,209
Net income | 77,392 | 69,638
Operating Segments | Purchased gas cost | Distribution segment |  |
Purchased gas cost | 881,915 | 496,799
Operating Segments | Purchased gas cost | Pipeline and storage segment |  |
Purchased gas cost | (858) | (3,411)
Eliminations |  |
Operating revenues | (143,046) | (122,554)
Purchased gas cost | (142,808) | (122,225)
Operation and maintenance expense | (238) | (329)
Depreciation and amortization expense | 0 | 0
Taxes, other than income | 0 | 0
Operating income | 0 | 0
Other non-operating income | 0 | 0
Interest charges | 0 | 0
Income before income taxes | 0 | 0
Income tax expense | 0 | 0
Net income | 0 | 0
Eliminations | Distribution segment |  |
Operating revenues | 733 | 786
Eliminations | Pipeline and storage segment |  |
Operating revenues | 142,313 | 121,768
Eliminations | Purchased gas cost |  |
Purchased gas cost | $ (142,808) | $ (122,225)

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