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Note 10 (Detail) (USD $)
6 Months Ended
Apr. 30, 2013
Jun. 20, 2014
Oct. 31, 2012
Apr. 30, 2013
Letters of Credit Collateral [Member]
Oct. 31, 2012
Letters of Credit Collateral [Member]
Apr. 30, 2013
After November 1 [Member]
Chase Master Repurchase Agreement [Member]
May 27, 2014
Reference Rate [Member]
Minimum [Member]
Chase Master Repurchase Agreement [Member]
Jun. 20, 2014
Reference Rate [Member]
Minimum [Member]
Credit Suisse Master Repurchase Agreement [Member]
Apr. 30, 2013
Reference Rate [Member]
Minimum [Member]
Credit Suisse Master Repurchase Agreement [Member]
Apr. 30, 2013
Reference Rate [Member]
May 27, 2014
Spread [Member]
Minimum [Member]
Chase Master Repurchase Agreement [Member]
Apr. 30, 2013
Spread [Member]
Minimum [Member]
Credit Suisse Master Repurchase Agreement [Member]
Jun. 20, 2014
Spread [Member]
Minimum [Member]
Customers Master Repurchase Agreement [Member]
May 27, 2014
Spread [Member]
Maximum [Member]
Chase Master Repurchase Agreement [Member]
Jun. 20, 2014
Spread [Member]
Maximum [Member]
Customers Master Repurchase Agreement [Member]
Apr. 30, 2013
Residential Mortgage [Member]
Apr. 30, 2013
Commercial Real Estate [Member]
Apr. 30, 2013
Chase Master Repurchase Agreement [Member]
Jun. 20, 2014
Credit Suisse Master Repurchase Agreement [Member]
May 27, 2014
Customers Master Repurchase Agreement [Member]
Apr. 30, 2013
Customers Master Repurchase Agreement [Member]
Secured Debt $ 978,000,000                             $ 30,400,000 $ 18,300,000        
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 30,900,000                                        
Long-term Debt, Maturities, Repayments of Principal in Year Two 1,100,000                                        
Long-term Debt, Maturities, Repayments of Principal in Year Three 1,200,000                                        
Long-term Debt, Maturities, Repayments of Principal in Year Four 1,300,000                                        
Long-term Debt, Maturities, Repayments of Principal in Year Five 1,400,000                                        
Long-term Debt, Maturities, Repayments of Principal after Year Five 12,800,000                                        
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum 4.25%                                        
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum 10.00%                                        
Letters of Credit Outstanding, Amount 26,600,000   29,500,000                                    
Cash Collateral for Borrowed Securities       27,000,000 30,700,000                                
Line of Credit Facility, Maximum Borrowing Capacity           50,000,000                         50,000,000 37,500,000  
Assets Sold under Agreements to Repurchase, Interest Rate 3.50%           0.50% 0.54% 1.00% 0.1982% 3.00% 2.50% 3.75% 5.50% 4.00%            
Warehouse Agreement Borrowings $ 26,200,000                                 $ 32,200,000     $ 7,600,000
Line of Credit Facility, Number of Days from Receipt of a Termination Notice Requirement   364 years