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Stock-Based Compensation - Additional Information (Detail) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 12 Months Ended |
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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 | Jan. 31, 2013 USD ($) director $ / shares shares | Oct. 31, 2015 USD ($) | Oct. 31, 2014 USD ($) | Oct. 31, 2013 USD ($) | Apr. 30, 2011 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Stock compensation expense |  |  |  |  |  |  | $ 2,108 | $ 727 | $ 376 |
Share-based Compensation |  |  |  |  |  |  | 2,108 | 727 | 376 |
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 |  |  |
Share-based Compensation |  |  |  |  |  |  | 500 |  |  |
Chief Financial officer and Chief Operating officer |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Stock compensation expense |  |  |  |  |  |  | 600 |  |  |
Market price of common stock at grant date | $ / shares | $ 49.95 |  |  |  |  |  |  |  |  |
Unvested portion of restricted stock forfeited | shares |  |  | 12,322 |  |  |  |  |  |  |
Unrestricted shares granted | shares | 12,322 |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  | 600 |  |  |
Stock Options [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated fair market value of options |  |  |  |  |  | $ 100 |  |  |  |
Stock options total compensation cost, not yet recognized |  |  |  |  |  |  | $ 100 |  |  |
Remaining service period for recognition of unrecognized compensation cost |  |  |  |  |  |  | 60 months |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Stock compensation expense |  |  |  |  |  |  | $ 100 | 100 | 200 |
Share-based Compensation |  |  |  |  |  |  | 100 | 100 | 200 |
Restricted Stock [Member] | Non-employee directors [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Stock compensation expense |  |  |  |  |  |  | 200 | 500 |  |
Share-based Compensation |  |  |  |  |  |  | 200 | 500 |  |
2005 Stock Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Total intrinsic value of options exercised |  |  |  |  |  |  | 300 |  |  |
Estimated fair market value of options |  |  |  |  |  |  | $ 500 | $ 800 | $ 600 |
2005 Stock Incentive Plan [Member] | Stock Options [Member] | Board of Director Members for October Two Thousand Eleven Option Grants [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Stock options vesting period |  |  |  |  |  |  | 5 years |  |  |
Term of vested stock options |  |  |  |  |  |  | 5 years |  |  |
2005 Stock Incentive Plan [Member] | Stock Options [Member] | Board of Director Members for April Two Thousand Eleven Option Grants [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Stock options vesting period |  |  |  |  |  |  | 1 year |  |  |
Term of vested stock options |  |  |  |  |  |  | 2 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 |  |  |  |  | $ 30.50 | $ 24.71 |  |  |  |
Estimated fair market value of options |  |  |  |  |  |  | $ 200 |  |  |
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 |  |  |  |  | $ 32.49 |  |  |  |  |
2011 Management Incentive Plan [Member] | Board of Director Members for October Two Thousand Eleven Option Grants [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Market price of common stock at grant date | $ / shares |  |  |  |  |  | $ 23.48 |  |  |  |
Term of vested stock options |  |  |  |  |  | 5 years |  |  |  |
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 | 1,000 |  |  |  |
2011 Management Incentive Plan [Member] | Stock Options [Member] | Board of Director Members for October Two Thousand Eleven Option Grants [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock shares authorized under ESPP | shares |  |  |  |  |  | 10,000 |  |  |  |
Exercise price of stock options granted to non-employee director | $ / shares |  |  |  |  |  | $ 23.48 |  |  |  |
Stock options vesting period |  |  |  |  |  | 5 years |  |  |  |
2011 Management Incentive Plan [Member] | Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Restricted shares issued per non-employee director | shares |  |  |  | 1,750 |  |  |  |  |  |
Total restricted shares issued to non-employee directors | shares |  |  |  | 21,000 | 21,000 | 12,000 |  |  |  |
Restricted stock closing price awarded | $ / shares |  |  |  | $ 40.39 |  |  |  |  |  |
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 |  |  |
Share-based Compensation |  |  |  |  |  |  | $ 700 |  |  |
2011 Management Incentive Plan [Member] | Restricted Stock [Member] | Executive officers [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Total restricted shares issued | shares |  |  |  |  | 10,774 |  |  |  |  |

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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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