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Basis of Presentation and Significant Accounting Policies (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Jul. 31, 2012
Oct. 31, 2012
Oct. 31, 2011
Oct. 31, 2010
Financial Statements of Consignment Arrangements        
Sales $ 551,119 $ 551,119 $ 522,529 $ 398,351
Cost of sales   490,453 480,221 346,821
Gross margin   60,666 42,308 51,530
Consignment Arrangement [Member]
       
Financial Statements of Consignment Arrangements        
Sales   28,297 38,327 54,736
Cost of sales   25,893 34,859 48,713
Gross margin   $ 2,404 $ 3,468 $ 6,023