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SELECTED FINANCIAL STATEMENT INFORMATION (Accounts Receivable) (Details) - USD ($)
$ in Thousands
Apr. 30, 2017
Oct. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable $ 216,697 $ 205,386
Less: Allowance for doubtful accounts (3,590) (3,159)
Accounts receivable, net $ 213,107 $ 202,227