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Investments in Non-Performing Loan Portfolios and Foreclosed Real Estate (Tables)
 12 Months Ended
Oct. 31, 2011
Investments in Non-Performing Loan Portfolios and Foreclosed Real Estate (Tables) [Abstract]  
Summary of accretable yield and nonaccretable difference on investments in non-performing loans portfolios
         
Contractually required payments, including interest
  $ 200,047  
Nonaccretable difference
    (81,723 )
 
     
Cash flows expected to be collected
    118,324  
Accretable difference
    (51,462 )
 
     
Non-performing loans carrying amount
  $ 66,862  
 
     
Investment in non-performing loan portfolios
         
Unpaid principal balance
  $ 171,559  
Discount on acquired loans
    (108,325 )
 
     
Carrying value
  $ 63,234  
 
     
Activity in accretable yield for investment in non-performing loan portfolios
         
Balance at November 1, 2010
  $ —  
Additions
    51,462  
Accretion
    (4,480 )
Reductions from foreclosures and other dispositions
    (4,599 )
Other
    (57 )
 
     
Balance at October 31, 2011
  $ 42,326