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Investments in Distressed Loans and Foreclosed Real Estate (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Jul. 31, 2014
Jul. 31, 2013
Jul. 31, 2014
Jul. 31, 2013
Oct. 31, 2013
Investment in non-performing loan portfolios          
Impaired Financing Receivable, Unpaid Principal Balance $ 13,437   $ 13,437   $ 63,381
Discount on acquired loans (9,186)   (9,186)   (27,007)
Investments in distressed loans 4,251   4,251   36,374
Activity in accretable yield for investment in non-performing loan portfolios          
Begining balance 2,832 11,229 6,606 17,196  
Additions    541 554 706  
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans (2,832) (2,418) (6,204) (6,027)  
Accretions    (987) (956) (3,510)  
Ending balance 0 8,365 0 8,365  
Schedule of changes in real estate owned [Roll Forward]          
Real Estate Acquired Through Foreclosure 76,652 71,458 72,972 58,353  
Real Estate Owned Additions 13,167 5,855 21,203 20,172  
Real Estate Owned, Sales (9,366) (3,801) (13,558) (4,713)  
Real Estate Owned, Impairments 1,044 490 (1,046) (505)  
Real Estate Held And Used Depreciation (90) (110) (252) (395)  
Real Estate Acquired Through Foreclosure $ 79,319 $ 72,912 $ 79,319 $ 72,912