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Note 21 (Detail) (USD $)
 3 Months Ended 9 Months Ended
Jul. 31, 2012
Jul. 31, 2011
Jul. 31, 2012
Jul. 31, 2011
Oct. 31, 2011
Loans Held for Sale, Mortgages, Unpaid Principal $ 87,400,000   $ 87,400,000   $ 70,400,000
Impairment of Real Estate 200,000 5,100,000 5,400,000 28,200,000  
Loan Applications in Process 389,800,000   389,800,000    
Number of Days in Commitment 60 years   60 years    
Other Commitment 20,500,000   20,500,000    
Interest Rate Committed [Member]
          
Interest Rate Committed Loan Applications 50,600,000   50,600,000    
Senior Secured Notes [Member]
          
Notes Payable, Fair Value Disclosure 966,700,000   966,700,000   653,500,000
Senior Notes [Member]
          
Notes Payable, Fair Value Disclosure 396,400,000   396,400,000   359,000,000
Senior Subordinated Notes [Member]
          
Notes Payable, Fair Value Disclosure $ 3,900,000   $ 3,900,000   $ 4,400,000