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Employee Benefits (Narrative) (Details) (USD $) | 12 Months Ended |  |  | 12 Months Ended
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Oct. 31, 2012 | Oct. 31, 2011 | Oct. 31, 2010 | Oct. 31, 2012 Restricted Stock Awards [Member] | Oct. 31, 2011 Restricted Stock Awards [Member] | Oct. 31, 2010 Restricted Stock Awards [Member] | Jul. 31, 2012 Restricted Stock Awards [Member] Maximum [Member] | Oct. 31, 2012 2005 Stock Incentive Plan [Member] | Oct. 31, 2012 2011 Stock Incentive Plan [Member] | Oct. 31, 2012 Non-employee Directors Stock Plan [Member] | Oct. 31, 2012 Non-employee Directors Stock Plan [Member] Restricted Stock Awards [Member] | Oct. 31, 2011 Non-employee Directors Stock Plan [Member] Restricted Stock Awards [Member] | Oct. 31, 2010 Non-employee Directors Stock Plan [Member] Restricted Stock Awards [Member] | Oct. 31, 2012 Non-employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Health insurance coverage expense | $ 3,303,968 | $ 3,073,366 | $ 2,604,225 |  |  |  |  |  |  |  |  |  |  |
Matching 401(k) contributions | 229,417 | 83,245 | 76,583 |  |  |  |  |  |  |  |  |  |  |
Shares authorized and reserved for common stock issuance |  |  |  |  |  |  |  | 1,000,000 | 500,000 | 250,000 |  |  |  |
Shares available for grant |  |  |  |  |  |  |  | 20,000 | 127,000 | 66,000 |  |  |  |
Share-based compensation expense | 1,440,534 | 893,354 | 942,711 |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense for employees |  |  |  | 1,287,271 | 746,431 | 870,473 |  |  |  |  |  |  |  |
Share-based compensation expense for non-employee directors |  |  |  |  |  |  |  |  |  |  | 153,263 | 146,923 | 72,238 |
Restricted share grants |  |  |  |  |  |  |  |  |  |  | 44,424 | 30,356 | 22,860 |
Compensation cost related to unvested equity-based compensation, period (in years) |  |  |  | 2 years 8 months 12 days |  |  |  |  |  |  |  |  |  |
Compensation cost related to unvested equity-based compensation |  |  |  |  |  |  | $ 1,600,000 |  |  |  |  |  |  |
Options to purchase |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,123
Exercise price |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7.12
Vesting period |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 month

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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 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: 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=6793087&loc=d3e301413-122809 + Details
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- Definition As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph h -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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 (a)(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 Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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