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Basis of Presentation (Tables) | 6 Months Ended
--- | ---
Mar. 31, 2016
Basis of Presentation |
Schedule of restatement of financials from adoption of accounting principle change |
|  |  |  |  |  | After Voluntary |
|  |  |  |  |  | Change in |
|  |  |  |  |  | Accounting |
|  | As Reported |  | Adjustments |  | Principle |
|  | Three Months Ended March 31, 2015 |
|  | (in thousands) |
Operating revenues |  | $ | 883,052 |  | $ | 2,618 |  | $ | 885,670 |
Operating costs, excluding depreciation |  | 469,328 |  | (2,229 | ) | 467,099 |
Net income |  | 149,537 |  | 4,006 |  | 153,543 |
Diluted earnings per common share |  | 1.37 |  | 0.04 |  | 1.41 |
|  | Six Months Ended March 31, 2015 |
|  | (in thousands) |
Operating revenues |  | $ | 1,939,637 |  | $ | (6,820 | ) | $ | 1,946,457 |
Operating costs, excluding depreciation |  | 1,023,571 |  | (2,991 | ) | 1,026,562 |
Net income |  | 352,579 |  | 4,572 |  | 357,151 |
Diluted earnings per common share |  | 3.23 |  | 0.04 |  | 3.27 |
|  | September 30, 2015 |
|  | (in thousands) |
Total assets |  | $ | 7,152,012 |  | $ | (4,770 | ) | $ | 7,147,242 |
Total liabilities |  | 2,254,560 |  | (3,164 | ) | 2,251,396 |
Total shareholders’ equity |  | 4,897,452 |  | (1,606 | ) | 4,895,846 |

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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=56949863&loc=d3e22580-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Direct Effects of a Change in Accounting Principle -URI http://asc.fasb.org/extlink&oid=6510796 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Indirect Effects of a Change in Accounting Principle -URI http://asc.fasb.org/extlink&oid=6515603 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e765-108305 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Accounting Change -URI http://asc.fasb.org/extlink&oid=6503790 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=56949863&loc=d3e22499-107794 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(b)(6)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=56949863&loc=d3e22583-107794 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Change in Accounting Principle -URI http://asc.fasb.org/extlink&oid=6507316 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e725-108305 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Retrospective Application -URI http://asc.fasb.org/extlink&oid=6523989 + Details
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