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Guarantor and Non-Guarantor Financial Information - Statement of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS |  |
Operating revenue | $ 564,087 | $ 368,590
Operating costs and other | 560,567 | 417,754
Operating income (loss) from continuing operations | 3,520 | (49,164)
Other income (expense), net | 2,254 | 1,377
Interest expense | (5,773) | (5,055)
Income (loss) from continuing operations before income taxes | 1 | (52,842)
Income tax expense (benefit) | (500,641) | (18,288)
Income (loss) from continuing operations | 500,642 | (34,554)
Income (loss) from discontinued operations before income taxes | (519) | (424)
Income tax provision | 17 | 85
Loss from discontinued operations | (536) | (509)
Net income (loss) | 500,106 | (35,063)
Eliminations |  |
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS |  |
Operating revenue | (16) | (17)
Operating costs and other | (205) | (231)
Operating income (loss) from continuing operations | 189 | 214
Other income (expense), net | (189) | (214)
Equity in net income (loss) of subsidiaries | (528,785) | 32,663
Income (loss) from continuing operations before income taxes | (528,785) | 32,663
Income (loss) from continuing operations | (528,785) | 32,663
Net income (loss) | (528,785) | 32,663
Guarantor/Parent | Reportable Legal Entities |  |
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS |  |
Operating costs and other | 4,178 | 3,460
Operating income (loss) from continuing operations | (4,178) | (3,460)
Other income (expense), net | 261 |
Interest expense | (28) | (86)
Equity in net income (loss) of subsidiaries | 507,420 | (32,992)
Income (loss) from continuing operations before income taxes | 503,475 | (36,538)
Income tax expense (benefit) | 3,369 | (1,475)
Income (loss) from continuing operations | 500,106 | (35,063)
Net income (loss) | 500,106 | (35,063)
Issuer Subsidiary | Reportable Legal Entities |  |
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS |  |
Operating revenue | 495,006 | 297,448
Operating costs and other | 481,648 | 339,502
Operating income (loss) from continuing operations | 13,358 | (42,054)
Other income (expense), net | 1,641 | 1,019
Interest expense | (5,700) | (4,709)
Equity in net income (loss) of subsidiaries | 21,365 | 329
Income (loss) from continuing operations before income taxes | 30,664 | (45,415)
Income tax expense (benefit) | (478,594) | (12,550)
Income (loss) from continuing operations | 509,258 | (32,865)
Net income (loss) | 509,258 | (32,865)
Non-Guarantor Subsidiaries | Reportable Legal Entities |  |
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS |  |
Operating revenue | 69,097 | 71,159
Operating costs and other | 74,946 | 75,023
Operating income (loss) from continuing operations | (5,849) | (3,864)
Other income (expense), net | 541 | 572
Interest expense | (45) | (260)
Income (loss) from continuing operations before income taxes | (5,353) | (3,552)
Income tax expense (benefit) | (25,416) | (4,263)
Income (loss) from continuing operations | 20,063 | 711
Income (loss) from discontinued operations before income taxes | (519) | (424)
Income tax provision | 17 | 85
Loss from discontinued operations | (536) | (509)
Net income (loss) | $ 19,527 | $ 202

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