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Guarantor and Non-Guarantor Financial Information - Income Statement (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
CONDENSED CONSOLIDATING STATEMENTS OF INCOME |  |
Operating revenues | $ 487,847 | $ 1,060,787
Operating costs and other | 449,177 | 730,416
Operating income from continuing operations | 38,670 | 330,371
Other income (expense), net | 472 | 609
Interest expense | (4,524) | (590)
Income from continuing operations before income taxes | 34,618 | 330,390
Income tax provision | 18,720 | 126,767
Income from continuing operations | 15,898 | 203,623
Income from discontinued operations before income taxes | 104 | (15)
Income (loss) from discontinued operations | 104 | (15)
NET INCOME | 16,002 | 203,608
Eliminations |  |
CONDENSED CONSOLIDATING STATEMENTS OF INCOME |  |
Operating revenues | (17) | (16)
Operating costs and other | (401) | (1,032)
Operating income from continuing operations | 384 | 1,016
Other income (expense), net | (384) | (1,016)
Equity in net income of subsidiaries | (9,352) | (212,077)
Income from continuing operations before income taxes | (9,352) | (212,077)
Income from continuing operations | (9,352) | (212,077)
NET INCOME | (9,352) | (212,077)
Guarantor/Parent | Reportable Legal Entities |  |
CONDENSED CONSOLIDATING STATEMENTS OF INCOME |  |
Operating costs and other | 2,705 | 3,021
Operating income from continuing operations | (2,705) | (3,021)
Other income (expense), net | 20 | 1
Interest expense | (62) | (7)
Equity in net income of subsidiaries | 17,549 | 205,359
Income from continuing operations before income taxes | 14,802 | 202,332
Income tax provision | (1,200) | (1,276)
Income from continuing operations | 16,002 | 203,608
NET INCOME | 16,002 | 203,608
Issuer Subsidiary | Reportable Legal Entities |  |
CONDENSED CONSOLIDATING STATEMENTS OF INCOME |  |
Operating revenues | 405,537 | 952,109
Operating costs and other | 356,751 | 629,038
Operating income from continuing operations | 48,786 | 323,071
Other income (expense), net | 656 | 921
Interest expense | (4,718) |
Interest income (expense) |  | 18
Equity in net income of subsidiaries | (8,197) | 6,718
Income from continuing operations before income taxes | 36,527 | 330,728
Income tax provision | 19,227 | 126,122
Income from continuing operations | 17,300 | 204,606
NET INCOME | 17,300 | 204,606
Non-Guarantor Subsidiaries | Reportable Legal Entities |  |
CONDENSED CONSOLIDATING STATEMENTS OF INCOME |  |
Operating revenues | 82,327 | 108,694
Operating costs and other | 90,122 | 99,389
Operating income from continuing operations | (7,795) | 9,305
Other income (expense), net | 180 | 703
Interest expense | 256 | (601)
Income from continuing operations before income taxes | (7,359) | 9,407
Income tax provision | 693 | 1,921
Income from continuing operations | (8,052) | 7,486
Income from discontinued operations before income taxes | 104 | (15)
Income (loss) from discontinued operations | 104 | (15)
NET INCOME | $ (7,948) | $ 7,471

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