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Fair Value Disclosures (Details) (USD $)
In Thousands, unless otherwise specified
Jan. 31, 2012
Oct. 31, 2011
Corporate Securities [Member]
   
Summary of assets and (liabilities), measured at fair value on a recurring basis    
Fair value of securities $ 143,729 $ 233,572
Fair Value, Measurements, Recurring [Member] | Forward Loan Commitments - Residential Mortgage Loans Held for Sale [Member] | Level 2 [Member]
   
Summary of assets and (liabilities), measured at fair value on a recurring basis    
Fair value of commitments (96) 218
Fair Value, Measurements, Recurring [Member] | Interest Rate Lock Commitments [Member] | Level 2 [Member]
   
Summary of assets and (liabilities), measured at fair value on a recurring basis    
Fair value of commitments 85 (147)
Fair Value, Measurements, Recurring [Member] | Forward Loan Commitments [Member] | Level 2 [Member]
   
Summary of assets and (liabilities), measured at fair value on a recurring basis    
Fair value of commitments (85) 147
Fair Value, Measurements, Recurring [Member] | Residential Mortgage Loans Held-for-Sale [Member] | Level 2 [Member]
   
Summary of assets and (liabilities), measured at fair value on a recurring basis    
Fair value of loans $ 36,911 $ 63,175