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Mexican IVA taxes receivable (Details) - USD ($)
$ in Thousands
Oct. 31, 2017
Oct. 31, 2016
Value Added Tax Receivable [Abstract]    
IVA receivables balance $ 19,500 $ 15,400
Mexican IVA (i.e. value-added) tax receivable recorded in prepaids & other current assets   8,400
Mexican IVA (i.e. value-added) tax receivable recorded in other assets $ 18,174 $ 6,962