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Note 16 (Detail) (USD $) | 3 Months Ended | 6 Months Ended |  |  |  | 0 Months Ended |  |  |  |  |  |  |  | 0 Months Ended | 3 Months Ended |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2012 | Apr. 30, 2012 | Apr. 30, 2013 | Jul. 03, 2001 | Mar. 12, 2013 Increased Amount [Member] Common Class A [Member] | Mar. 12, 2013 Increased Amount [Member] Common Class B [Member] | Apr. 11, 2012 Common Class A [Member] | Apr. 30, 2013 Common Class A [Member] | Mar. 12, 2013 Common Class A [Member] | Oct. 31, 2012 Common Class A [Member] | Apr. 30, 2013 Common Class B [Member] | Mar. 12, 2013 Common Class B [Member] | Oct. 31, 2012 Common Class B [Member] | Apr. 30, 2013 Minimum [Member] | Apr. 11, 2012 Senior Notes Purchased With Stock Issuance Proceeds [Member] | Apr. 30, 2012 The 8.625% 2017 Notes [Member] | Apr. 30, 2012 The 12.072% Notes [Member] | Apr. 30, 2012 8.625% Senior Notes and 12.072% Senior Notes [Member]
Number of Votes |  |  |  |  |  |  |  | 1 |  |  |  | 10 |  |  |  |  |  |  |  |
Common Stock Dividends, Percent of Increase from Class A to Class B |  |  | 110.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized (in Shares) |  |  |  |  | 400,000,000 | 60,000,000 |  | 400,000,000 | 200,000,000 | 400,000,000 | [1] | 60,000,000 | 30,000,000 | 60,000,000 | [1] |  |  |  |  |
Common Stock, Par or Stated Value Per Share (in Dollars per share) |  |  |  |  |  |  |  | $ 0.01 | $ 0.01 | $ 0.01 | [1] | $ 0.01 | $ 0.01 | $ 0.01 | [1] |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in Shares) |  |  |  |  |  |  | 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of Stock, Price Per Share (in Dollars per share) |  |  |  |  |  |  | $ 2.00 |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues (in Dollars) |  |  |  |  |  |  | $ 47,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Face Amount of Debt Repurchased (in Dollars) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 75,400,000 |  |  |
Stock Issued During Period, Shares, Other (in Shares) | 3,064,330 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Repurchased Face Amount (in Dollars) | 12,200,000 | 12,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,100,000 | 3,100,000 |
Gains (Losses) on Extinguishment of Debt (in Dollars) | $ 27,039,000 | $ 51,737,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,500,000 |  | $ 3,700,000
Shareholder Ownership Percentage |  |  | 4.90% |  |  |  |  |  |  |  |  |  |  |  |  | 5.00% |  |  |  |
Shareholder Ownership, Percentage of Increase |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Rights |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholder, Percent of Stock Acquired |  |  | 4.90% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders, Pre-existing Ownership Percentage |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders, Current Ownership Percentage |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders Ownership Percentage on Transfers |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholders, Ownership Percentage Threshold |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in Shares) |  |  |  | 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Repurchased (in Shares) |  |  | 3,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Derived from the audited balance sheet as of October 31, 2012.

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