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Income Taxes (Details 2)
12 Months Ended
Oct. 31, 2012
Oct. 31, 2011
Oct. 31, 2010
Reconciliation of significant differences between federal statutory income tax rate and effective income tax rate      
Federal statutory tax rate 35.00% 35.00% 35.00%
State taxes, net of federal effects 1.70% 4.80% 4.80%
Foreign income taxes greater (less) than U.S. (2.70%) (0.90%) (0.90%)
Hacienda assessment 6.30%    
Other (0.80%) 0.90% 0.20%
Effective Income Tax Rate, Total 39.50% 39.80% 39.10%