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Investments in Non-Performing Loan Portfolios and Foreclosed Real Estate (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Jul. 31, 2012
Jul. 31, 2011
Jul. 31, 2012
Jul. 31, 2011
Dec. 28, 2011
Oct. 31, 2011
Summary of accretable yield and nonaccretable difference on investments in non-performing loans portfolios            
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition         $ 58,234  
Nonaccretable difference         (8,235)  
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition         49,999  
Certain loans acquired in transfer not accouted for as debt security,acquisition date accret cash flow         (20,514)  
Non-performing loans carrying amount         29,485  
Investment in non-performing loan portfolios            
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance 143,981   143,981     171,559
Discount on acquired loans (83,732)   (83,732)     (108,325)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net 60,249   60,249     63,234
Activity in accretable yield for investment in non-performing loan portfolios            
Begining balance 49,256 32,712 42,326       
Certain Loans Acquired in Transfer Not Accounted for as a Debt Security, Accret Dff, at acquistion       20,514 33,212    
Additions 1,297    4,123       
Accretions (2,655) (1,729) (9,214) (2,229)    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans (14,141) (451) (24,090) (451)    
Other       98       
Ending balance 33,757 30,532 33,757 30,532    
Schedule of changes in real estate owned [Roll Forward]            
Real Estate Owned - total beginning of period 18,108    5,939       
Real Estate Owned Additions 20,861 734 33,663 734    
Real Estate Owned, Sales (731)    (1,346)       
Real Estate Owned, Impairments (126)    (126)       
Real Estate Held And Used Depreciation (120)    (138)       
Real Estate Owned - total end of period $ 37,992 $ 734 $ 37,992 $ 734