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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.