| **Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands** | Total       | Common Stock | Retained Earnings | Accumulated Other Comprehensive Income (Loss) |
|-------------------------------------------------------------------------------------------------------------------------|-------------|--------------|-------------------|-----------------------------------------------|
| Stockholders' Equity, beginning balance at Oct. 31, 2014                                                                | $ 1,308,602 | $ 636,835    | $ 672,004         | $ (237)                                       |
| Common Stock, Shares, Outstanding, Beginning Balance at Oct. 31, 2014                                                   |        | 78,531       |              |                                          |
| **Increase (Decrease) in Stockholders' Equity [Roll Forward]**                                                          |        |         |              |                                          |
| Net income                                                                                                              | 151,120     |         | 151,120           |                                          |
| Other Comprehensive Income (Loss)                                                                                       | (391)       |         |              | (391)                                         |
| Common Stock Issued                                                                                                     | 24,248      | $ 24,248     |              |                                          |
| Common Stock Issued (Shares)                                                                                            |        | 664          |              |                                          |
| Expenses from Issuance of Common Stock                                                                                  | (362)       | $ (362)      |              |                                          |
| Tax Benefit from Dividends Paid on ESOP Shares                                                                          | 93          |         | 93                |                                          |
| Dividends Declared                                                                                                      | (77,249)    |         | (77,249)          |                                          |
| Common Stock, Shares, Outstanding, Ending Balance at Jul. 31, 2015                                                      |        | 79,195       |              |                                          |
| Stockholders' Equity, ending balance at Jul. 31, 2015                                                                   | 1,406,061   | $ 660,721    | 745,968           | (628)                                         |
| Stockholders' Equity, beginning balance at Oct. 31, 2015                                                                | $ 1,426,312 | $ 721,419    | 705,748           | (855)                                         |
| Common Stock, Shares, Outstanding, Beginning Balance at Oct. 31, 2015                                                   | 80,883      | 80,883       |              |                                          |
| **Increase (Decrease) in Stockholders' Equity [Roll Forward]**                                                          |        |         |              |                                          |
| Net income                                                                                                              | $ 154,492   |         | 154,492           |                                          |
| Other Comprehensive Income (Loss)                                                                                       | 511         |         |              | 511                                           |
| Common Stock Issued                                                                                                     | 22,800      | $ 22,800     |              |                                          |
| Common Stock Issued (Shares)                                                                                            |        | 400          |              |                                          |
| Expenses from Issuance of Common Stock                                                                                  | (88)        | $ (88)       |              |                                          |
| Tax Benefit from Dividends Paid on ESOP Shares                                                                          | 88          |         | 88                |                                          |
| Dividends Declared                                                                                                      | $ (81,919)  |         | (81,919)          |                                          |
| Common Stock, Shares, Outstanding, Ending Balance at Jul. 31, 2016                                                      | 81,283      | 81,283       |              |                                          |
| Stockholders' Equity, ending balance at Jul. 31, 2016                                                                   | $ 1,522,196 | $ 744,131    | $ 778,409         | $ (344)                                       |

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The cost incurred directly with the issuance of an equity security.
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The tax benefit resulting from dividends paid on stock held by an employee stock ownership plan.
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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.
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| - Definition
Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.
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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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| - Definition
Amount after tax and reclassification adjustments of other comprehensive income (loss).
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| - Definition
Number of new stock issued during the period.
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| - Definition
Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.
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| - Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.
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