| **Earnings Per Share (Tables)**                   | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
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| **Earnings Per Share [Abstract]**                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Schedule of Earnings Per Share, Basic and Diluted | A reconciliation of basic and diluted EPS, which includes contingently issuable shares that could affect EPS if performance units ultimately vest and any FSAs settle, for the three months and nine months ended July 31, 2016 and 2015 is presented below. Three Months Nine MonthsIn thousands, except per share amounts2016 2015 2016 2015Net Income (Loss)$(6,730) $(8,260) $154,492 $151,120        Average shares of common stock outstanding for basic earnings per share81,214 79,039 81,095 78,826Contingently issuable shares under ICP awards *— — 87 286Contingently issuable restricted nonvested shares under accelerated ICP awards *—  182  Contingently issuable shares under FSAs *— — 28 63Average shares of dilutive stock81,214 79,039 81,392 79,175        Earnings (Loss) Per Share of Common Stock:       Basic$(0.08) $(0.10) $1.91 $1.92Diluted$(0.08) $(0.10) $1.90 $1.91         * The inclusion of 306 and 301 contingently issuable shares in the three months ended July 31, 2016 and 2015, respectively, under ICP awards and FSAs would have been antidilutive. |

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| - References
No definition available.
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| - Definition
Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257
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