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Note 12 (Detail) (USD $) | 3 Months Ended | 6 Months Ended |  |  |  | 27 Months Ended |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2012 | Apr. 30, 2013 | Apr. 30, 2012 | Oct. 31, 2012 | Feb. 09, 2011 | Feb. 09, 2011 Initial [Member] | Feb. 14, 2011 Additional [Member] | Apr. 30, 2013 Common Class A [Member] Life of the Issuance [Member] | Apr. 30, 2013 Minimum [Member] | Apr. 30, 2013 Maximum [Member] | Apr. 30, 2013 Life of the Issuance [Member] | Apr. 30, 2013 Tangible Equity Units [Member] | Apr. 30, 2012 Amortizing Notes [Member]
Tangible Equity Units, Units Issued |  |  |  |  |  |  | 3,000,000 | 450,000 |  |  |  |  |  |
Tangible Equity Units, Rate |  | 7.25% |  |  |  | 7.25% |  |  |  |  |  |  | 7.25% |
Subordinated Debt (in Dollars) |  | $ 4,180,000 |  | $ 6,091,000 | [1] |  |  |  |  |  |  |  | $ 4,200,000 |
Tangible Equity Units, Cash Installment, Per Note (in Dollars per share) |  | $ 0.453125 |  |  |  |  |  |  |  |  |  |  |  |
Tangible Equity Units Rate Per Year |  | 7.25% |  |  |  |  |  |  |  |  |  |  |  |
Tangible Equity Units, Stated Amount (in Dollars per share) |  | $ 25 |  |  |  |  |  |  |  |  |  |  |  |
Tangible Equity Units, Annual Interest Rate |  | 12.072% |  |  |  |  |  |  |  |  |  |  |  |
Tangible Equity Units, Number of Shares Upon Conversion, Per Unit |  |  |  |  |  |  |  |  |  | 4.7655 | 5.8140 |  |  |
Prepaid Stock Purchase Contracts Issued (in Dollars) |  |  |  |  |  |  |  |  |  |  |  |  | 68,100,000 |
Tangible Equity Units, Number Converted |  | 600,000 |  |  |  |  |  |  |  |  |  | 2,200,000 |  |
Prepaid Stock Purchase Contracts Shares Settled |  | 2,700,000 |  |  |  |  |  |  | 10,400,000 |  |  |  |  |
Stock Issued (in Dollars) |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,100,000
Gains (Losses) on Extinguishment of Debt (in Dollars) | $ 27,039,000 |  | $ 51,737,000 |  |  |  |  |  |  |  |  |  |  | $ 200,000
[1] | Derived from the audited balance sheet as of October 31, 2012.

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- Definition The number of prepaid common stock purchase contracts as a component of tangible equity units, which include both senior subordinated amortizing notes and a prepaid stock purchase contract, that have been converted to Class A Common Stock since the original issuance of the Tangible Equity Units. + References No definition available. + Details
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