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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Operating revenues [Abstract] |  |  |  |
Operating revenues | $ 526,501 | $ 456,212 | $ 2,294,855 | $ 2,021,005
Purchase Gas Cost [Abstract] |  |  |  |
Purchased gas cost | 114,176 | 64,583 | 852,975 | 682,265
Operation and maintenance expense | 128,690 | 131,388 | 385,867 | 379,073
Depreciation and amortization expense | 80,023 | 72,880 | 234,648 | 214,927
Taxes, other than income, expense | 62,948 | 58,965 | 185,611 | 171,959
Operating income | 140,664 | 128,396 | 635,754 | 572,781
Miscellaneous income (expense) | (289) | 1,118 | (450) | (90)
Interest charges | 28,498 | 27,679 | 86,472 | 84,775
Income (loss) from continuing operations before income taxes | 111,877 | 101,835 | 548,832 | 487,916
Income tax expense (benefit) | 41,069 | 35,692 | 201,974 | 177,224
Income from continuing operations | 70,808 | 66,143 | 346,858 | 310,692
Income from discontinued operations, net of tax, before gain on disposal | 0 | 5,050 | 10,994 | 5,172
Gain (Loss) on Disposal of Discontinued Operation, Net of Tax |  |  | 2,716 | 0
Income from discontinued operations, net of tax | 0 | 5,050 | 13,710 | 5,172
Net income (loss) | $ 70,808 | $ 71,193 | $ 360,568 | $ 315,864
Income (Loss) from Continuing Operations, Per Basic and Diluted Share | $ 0.67 | $ 0.64 | $ 3.27 | $ 3.01
Income (Loss) from Discontinued Operation, Net of Tax, Per Basic and Diluted Share | 0.00 | 0.05 | 0.13 | 0.05
Basic and diluted net income per share | 0.67 | 0.69 | 3.40 | 3.06
Cash dividends per share | $ 0.45 | $ 0.42 | $ 1.35 | $ 1.26
Weighted average shares outstanding: |  |  |  |
Weighted Average Number of Shares Outstanding, Basic and Diluted | 106,364 | 103,750 | 105,862 | 103,137
Distribution Segment [Member] |  |  |  |
Operating revenues [Abstract] |  |  |  |
Operating revenues | $ 494,060 | $ 424,905 | $ 2,211,257 | $ 1,936,475
Purchase Gas Cost [Abstract] |  |  |  |
Purchased gas cost | 197,767 | 147,569 | 1,106,209 | 912,231
Operation and maintenance expense | 99,631 | 101,819 | 296,048 | 294,154
Depreciation and amortization expense | 62,760 | 59,193 | 185,219 | 174,748
Taxes, other than income, expense | 56,850 | 52,662 | 165,032 | 153,198
Operating income | 77,052 | 63,662 | 458,749 | 402,144
Miscellaneous income (expense) | (62) | 1,243 | 334 | 804
Interest charges | 18,394 | 18,677 | 56,437 | 57,481
Income (loss) from continuing operations before income taxes | 58,596 | 46,228 | 402,646 | 345,467
Income tax expense (benefit) | 22,082 | 15,867 | 149,623 | 126,090
Income from continuing operations |  | 30,361 | 253,023 | 219,377
Income from discontinued operations, net of tax, before gain on disposal |  | 0 | 0 | 0
Gain (Loss) on Disposal of Discontinued Operation, Net of Tax |  |  | 0 |
Net income (loss) | 36,514 | 30,361 | 253,023 | 219,377
Pipeline and Storage Segment [Member] |  |  |  |
Operating revenues [Abstract] |  |  |  |
Operating revenues | 117,283 | 113,855 | 339,207 | 314,424
Purchase Gas Cost [Abstract] |  |  |  |
Purchased gas cost | 1,251 | (438) | 2,331 | (72)
Operation and maintenance expense | 29,059 | 29,569 | 89,863 | 84,919
Depreciation and amortization expense | 17,263 | 13,687 | 49,429 | 40,179
Taxes, other than income, expense | 6,098 | 6,303 | 20,579 | 18,761
Operating income | 63,612 | 64,734 | 177,005 | 170,637
Miscellaneous income (expense) | (227) | (125) | (784) | (894)
Interest charges | 10,104 | 9,002 | 30,035 | 27,294
Income (loss) from continuing operations before income taxes | 53,281 | 55,607 | 146,186 | 142,449
Income tax expense (benefit) | 18,987 | 19,825 | 52,351 | 51,134
Income from continuing operations |  | 35,782 | 93,835 | 91,315
Income from discontinued operations, net of tax, before gain on disposal |  | 0 | 0 | 0
Gain (Loss) on Disposal of Discontinued Operation, Net of Tax |  |  | 0 |
Net income (loss) | 34,294 | 35,782 | 93,835 | 91,315
Intersegment Elimination [Member] |  |  |  |
Operating revenues [Abstract] |  |  |  |
Operating revenues | (84,842) | (82,548) | (255,609) | (229,894)
Purchase Gas Cost [Abstract] |  |  |  |
Purchased gas cost | (84,842) | (82,548) | (255,565) | (229,894)
Operation and maintenance expense | 0 | 0 | (44) | 0
Depreciation and amortization expense | 0 | 0 | 0 | 0
Taxes, other than income, expense | 0 | 0 | 0 | 0
Operating income | 0 | 0 | 0 | 0
Miscellaneous income (expense) | 0 | 0 | 0 | 0
Interest charges | 0 | 0 | 0 | 0
Income (loss) from continuing operations before income taxes | 0 | 0 | 0 | 0
Income tax expense (benefit) | 0 | 0 | 0 | 0
Income from continuing operations |  | 0 | 0 | 0
Income from discontinued operations, net of tax, before gain on disposal |  | 0 | 0 | 0
Gain (Loss) on Disposal of Discontinued Operation, Net of Tax |  |  | 0 |
Net income (loss) | $ 0 | $ 0 | $ 0 | $ 0

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