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Investments in Distressed Loans and Foreclosed Real Estate (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Apr. 30, 2013
Apr. 30, 2012
Apr. 30, 2013
Apr. 30, 2012
Oct. 31, 2012
Dec. 28, 2011
Investment in non-performing loan portfolios            
Impaired Financing Receivable, Unpaid Principal Balance $ 102,131   $ 102,131   $ 99,693  
Discount on acquired loans 53,424   53,424   62,524  
Investments in distressed loans 48,707   48,707   37,169  
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 0   0     52,524
Nonaccretable difference           (5,125)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition           47,399
Certain loans acquired in transfer not accouted for as debt security,acquisition date accret cash flow           (20,514)
Non-performing loans carrying amount           26,885
Activity in accretable yield for investment in non-performing loan portfolios            
Begining balance 13,406 57,844 17,196 42,326    
Certain Loans Acquired in Transfer Not Accounted for as a Debt Security, Accret Dff, at acquistion          20,514    
Additions 471 3,010 471 2,826    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans 1,528 8,267 3,915 9,851    
Accretions (1,120) (3,331) (2,523) (6,559)    
Ending balance 11,229 49,256 11,229 49,256    
Schedule of changes in real estate owned [Roll Forward]            
Real Estate Owned - total beginning of period 68,764 6,488 58,353 5,939    
Real Estate Owned Additions 3,277 11,638 14,317 12,802    
Real Estate Owned, Sales 472    (911) (615)    
Real Estate Owned, Impairments       (15)       
Real Estate Held And Used Depreciation (111) (18) (286) (18)    
Real Estate Owned - total end of period $ 71,458 $ 18,108 $ 71,458 $ 18,108