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Income Taxes (Details Textual) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2011 | Oct. 31, 2012 | Oct. 31, 2011 | Oct. 31, 2010 | Oct. 31, 2009
Income Taxes (Textual) [Abstract] |  |  |  |  |
Number of states |  | 19 |  |  |
State taxes estimated rate, percentage |  | 6.40% | 5.00% | 5.00% |
Recognized cumulative valuation allowances against state deferred tax assets |  | $ (57,044,000) | $ (89,142,000) |  |
Proceeds from Federal Tax Refunds | 154,300,000 |  |  |  |
Valuation allowance - reversed |  | (394,718,000) | (25,689,000) | (128,640,000) |
net operating loss, carryback expiration periods |  | 5 years |  |  | 2 years
Federal Net Operating Loss Carryforwards [Member] |  |  |  |  |
Income Taxes (Textual) [Abstract] |  |  |  |  |
Time period of forward tax losses |  | P20Y |  |  |
Operating Loss Carryforwards |  | $ 106,300,000 |  |  |
State Net Operating Loss Carryforwards Low End Range [Member] | Minimum [Member] |  |  |  |  |
Income Taxes (Textual) [Abstract] |  |  |  |  |
Time period of forward tax losses |  | P5Y |  |  |
State Net Operating Loss Carryforwards Low End Range [Member] | Maximum [Member] |  |  |  |  |
Income Taxes (Textual) [Abstract] |  |  |  |  |
Time period of forward tax losses |  | P20Y |  |  |

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- Definition The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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