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Guarantor and Non-Guarantor Financial Information - Statement of Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS |  |
Operating revenue | $ 368,590 | $ 487,847
Operating costs and other | 417,754 | 449,177
Operating income (loss) from continuing operations | (49,164) | 38,670
Other income, net | 1,377 | 472
Interest expense | (5,055) | (4,524)
Income (loss) from continuing operations before income taxes | (52,842) | 34,618
Income tax provision | (18,288) | 18,720
Income (loss) from continuing operations | (34,554) | 15,898
Income (loss) from discontinued operations before income taxes | (424) | 104
Income tax provision | 85 |
Income (loss) from discontinued operations | (509) | 104
NET INCOME (LOSS) | (35,063) | 16,002
Eliminations |  |
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS |  |
Operating revenue | (17) | (17)
Operating costs and other | (231) | (401)
Operating income (loss) from continuing operations | 214 | 384
Other income, net | (214) | (384)
Equity in net income (loss) of subsidiaries | 32,663 | (9,352)
Income (loss) from continuing operations before income taxes | 32,663 | (9,352)
Income (loss) from continuing operations | 32,663 | (9,352)
NET INCOME (LOSS) | 32,663 | (9,352)
Guarantor/Parent | Reportable Legal Entities |  |
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS |  |
Operating costs and other | 3,460 | 2,705
Operating income (loss) from continuing operations | (3,460) | (2,705)
Other income, net |  | 20
Interest expense | (86) | (62)
Equity in net income (loss) of subsidiaries | (32,992) | 17,549
Income (loss) from continuing operations before income taxes | (36,538) | 14,802
Income tax provision | (1,475) | (1,200)
Income (loss) from continuing operations | (35,063) | 16,002
NET INCOME (LOSS) | (35,063) | 16,002
Issuer Subsidiary | Reportable Legal Entities |  |
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS |  |
Operating revenue | 297,448 | 405,537
Operating costs and other | 339,502 | 356,751
Operating income (loss) from continuing operations | (42,054) | 48,786
Other income, net | 1,019 | 656
Interest expense | (4,709) | (4,718)
Equity in net income (loss) of subsidiaries | 329 | (8,197)
Income (loss) from continuing operations before income taxes | (45,415) | 36,527
Income tax provision | (12,550) | 19,227
Income (loss) from continuing operations | (32,865) | 17,300
NET INCOME (LOSS) | (32,865) | 17,300
Non-Guarantor Subsidiaries | Reportable Legal Entities |  |
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS |  |
Operating revenue | 71,159 | 82,327
Operating costs and other | 75,023 | 90,122
Operating income (loss) from continuing operations | (3,864) | (7,795)
Other income, net | 572 | 180
Interest expense | (260) | 256
Income (loss) from continuing operations before income taxes | (3,552) | (7,359)
Income tax provision | (4,263) | 693
Income (loss) from continuing operations | 711 | (8,052)
Income (loss) from discontinued operations before income taxes | (424) | 104
Income tax provision | 85 |
Income (loss) from discontinued operations | (509) | 104
NET INCOME (LOSS) | $ 202 | $ (7,948)

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