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Stock Plans (Narrative) (Details) | 12 Months Ended
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Oct. 31, 2016 USD ($) director $ / shares shares | Oct. 31, 2015 USD ($) director shares | Oct. 31, 2014 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Net proceeds (payments) related to share-based compensation awards | $ 7,214,000 | $ (4,816,000) | $ 8,585,000
Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Expected requisite service period for options granted to employees (in months) | 60 months |  |
Total intrinsic value of options exercised | $ 41,900,000 |  |
Total unrecognized compensation cost expected to be recognized | $ 11,300,000 |  |
Total unrecognized compensation cost expected to be recognized over a remaining weighted-average vesting period (in years) | 3 years 6 months |  |
Performance Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Performance cycle | 3 years |  |
Percentage of performance units granted | 100.00% |  |
Total unrecognized compensation cost expected to be recognized | $ 9,100,000 |  |
Total unrecognized compensation cost expected to be recognized over a remaining weighted-average vesting period (in years) | 1 year 8 months |  |
2006 Directors Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of non-employee directors in committee | director |  | 2 |
Number of shares authorized to be granted | shares |  | 950,000 |
Shares remaining for future grant (in shares) | shares | 152,670 |  |
Award expiration date (in years) | 10 years |  |
2006 Directors Plan [Member] | Non Employee Directors [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Right to purchase shares of common stock awarded, per share amount | $ / shares | $ 0.10 |  |
2006 Directors Plan [Member] | Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award expiration date (in years) | 10 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 1 year |  |
2007 LTIP [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of non-employee directors in committee | director | 2 |  |
Number of shares authorized to be granted | shares | 6,930,000 |  |
Shares remaining for future grant (in shares) | shares | 2,010,278 |  |
Percentage fair market value of equity awards on grant date | 100.00% |  |
Award expiration date (in years) | 10 years |  |
2007 LTIP [Member] | Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total unrecognized compensation cost expected to be recognized | $ 52,300,000 |  |
Total unrecognized compensation cost expected to be recognized over a remaining weighted-average vesting period (in years) | 3 years 2 months |  |
November 15 [Member] | 2006 Directors Plan [Member] | Non Employee Directors [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Deferred Compensation Arrangement With Individual Amounts Authorized For Issuance | $ 270,000 |  |
November 15 [Member] | 2006 Directors Plan [Member] | Lead Director [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Deferred Compensation Arrangement With Individual Amounts Authorized For Issuance | 285,500 |  |
November 15 [Member] | 2006 Directors Plan [Member] | Board of Directors Chairman [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Deferred Compensation Arrangement With Individual Amounts Authorized For Issuance | $ 297,000 |  |
Minimum [Member] | Performance Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of performance units granted | 0.00% |  |
Minimum [Member] | 2007 LTIP [Member] | Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  |
Minimum [Member] | 2007 LTIP [Member] | Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  |
Maximum [Member] | Performance Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of performance units granted | 150.00% |  |
Maximum [Member] | 2007 LTIP [Member] | Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award expiration date (in years) | 10 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years |  |
Maximum [Member] | 2007 LTIP [Member] | Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years |  |

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