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Revolving Credit Facilities - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended 12 Months Ended 12 Months Ended
Oct. 31, 2013
Oct. 31, 2012
Oct. 31, 2013
Farm Credit West [Member]
May 31, 2011
Farm Credit West [Member]
Oct. 31, 2013
Bank Of America [Member]
Sep. 30, 2011
Bank Of America [Member]
Debt Instrument [Line Items]            
Credit available under borrowing agreement Revised       $ 40   $ 25
Credit available under borrowing agreement       30.0   15.0
Expiration date of credit facility     Feb. 01, 2016   Feb. 01, 2016  
Combined credit available under terms of agreements 65          
Weighted average interest rate 1.70% 1.80%        
Line of credit facility outstanding $ 34.0 $ 20.2