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Stock-Based Compensation - Additional Information (Details) |  |  |  |  | 1 Months Ended | 12 Months Ended | 24 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 08, 2016 $ / shares shares | Jan. 04, 2016 USD ($) director $ / shares shares | Jun. 01, 2015 $ / shares shares | Feb. 06, 2015 $ / shares shares | Feb. 28, 2015 shares | Jan. 31, 2015 director $ / shares shares | Jan. 31, 2014 director $ / shares shares | Oct. 31, 2016 USD ($) $ / shares shares | Oct. 31, 2015 USD ($) | Oct. 31, 2014 USD ($) | Oct. 31, 2016 USD ($) | Apr. 30, 2011 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Recognized stock-based compensation expense |  |  |  |  |  |  |  | $ 2,134,000 | $ 2,108,000 | $ 727,000 |  |
Stock compensation expense |  |  |  |  |  |  |  | 2,134,000 | 2,108,000 | 727,000 |  |
Executive Officers [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total restricted shares issued to non-employee directors | shares |  |  |  | 55,394 |  |  |  |  |  |  |  |
Restricted stock closing price awarded | $ / shares |  |  |  | $ 40.17 |  |  |  |  |  |  |  |
Stock compensation expense |  |  |  |  |  |  |  |  | 500,000 |  |  |
Chief Financial officer and Chief Operating officer |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restricted shares granted | shares |  |  | 12,322 |  |  |  |  |  |  |  |  |
Market price of common stock at grant date | $ / shares |  |  | $ 49.95 |  |  |  |  |  |  |  |  |
Stock compensation expense |  |  |  |  |  |  |  |  |  |  | $ 600,000 |
Unvested portion of restricted stock forfeited | shares |  |  |  |  | 12,322 |  |  |  |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock compensation expense |  |  |  |  |  |  |  | 100,000 | 100,000 | 100,000 |  |
Restricted Stock [Member] | Non-Employee Directors [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock compensation expense |  | $ 800,000 |  |  |  |  |  |  | 200,000 | 500,000 |  |
Restricted Stock [Member] | Executive Officers [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock compensation expense |  |  |  |  |  |  |  | 300,000 |  |  |  |
2005 Stock Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total intrinsic value of options exercised |  |  |  |  |  |  |  | 100,000 |  |  |  |
Estimated fair market value of options |  |  |  |  |  |  |  | $ 500,000 | 500,000 | $ 800,000 |  |
2005 Stock Incentive Plan [Member] | Stock Options [Member] | Board of Director Members for April Two Thousand Eleven Option Grants | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term of vested stock options |  |  |  |  |  |  |  | 2 years |  |  |  |
Vesting period |  |  |  |  |  |  |  | 1 year |  |  |  |
2005 Stock Incentive Plan [Member] | Stock Options [Member] | Board of Director Members for October Two Thousand Eleven Option Grants [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term of vested stock options |  |  |  |  |  |  |  | 5 years |  |  |  |
Vesting period |  |  |  |  |  |  |  | 5 years |  |  |  |
2011 Management Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Common stock shares authorized under ESPP | shares |  |  |  |  |  |  |  |  |  |  |  | 1,500,000
Number of non-employee directors | director |  | 12 |  |  |  | 12 | 12 |  |  |  |  |
Restricted stock closing price awarded | $ / shares | $ 48.68 |  |  |  |  |  | $ 30.50 |  |  |  |  |
Estimated fair market value of options |  |  |  |  |  |  |  | $ 300,000 |  |  |  |
2011 Management Incentive Plan [Member] | Non-Employee Directors [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock closing price awarded | $ / shares |  | $ 48.46 |  |  |  |  | $ 32.49 |  |  |  |  |
2011 Management Incentive Plan [Member] | Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restricted shares granted per non-employee | shares |  | 1,750 |  |  |  |  |  |  |  |  |  |
Restricted shares issued per non-employee director | shares |  |  |  |  |  | 1,750 |  |  |  |  |  |
Total restricted shares issued to non-employee directors | shares |  | 21,000 |  |  |  | 21,000 | 21,000 |  |  |  |  |
Restricted stock closing price awarded | $ / shares |  |  |  |  |  | $ 40.39 |  | $ 48.58 |  |  |  |
Restricted shares granted | shares |  |  |  |  |  |  |  | 51,000 |  |  |  |
Stock compensation expense |  |  |  |  |  |  |  | $ 2,100,000 |  |  |  |
2011 Management Incentive Plan [Member] | Restricted Stock [Member] | Non-Employee Directors [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock compensation expense |  |  |  |  |  |  |  |  | $ 700,000 |  |  |
2011 Management Incentive Plan [Member] | Restricted Stock [Member] | Executive Officers [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures | shares |  |  |  |  |  |  | 10,774 |  |  |  |  |
Unvested portion of restricted stock forfeited | shares | 24,582 |  |  |  |  |  |  |  |  |  |  |
2011 Management Incentive Plan [Member] | Stock Options [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restricted shares issued per non-employee director | shares |  |  |  |  |  |  | 1,750 |  |  |  |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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