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Sale of Non-United States Accounts Receivable - Additional Information (Detail)
3 Months Ended 9 Months Ended
Jan. 31, 2016
USD ($)
Jul. 31, 2017
USD ($)
Jul. 31, 2017
EUR (€)
Jul. 31, 2017
SGD
Finance Receivable Transferred To Held For Sale [Line Items]        
Minimum percentage of eligible receivables related with bank funds initial purchase price   75.00%    
Maximum percentage of eligible receivables related with bank funds initial purchase price   90.00%    
European RPA        
Finance Receivable Transferred To Held For Sale [Line Items]        
Financing receivable maximum amount under receivable purchase agreement   $ 116,700,000 € 100,000,000  
Purchasing Bank Affiliate        
Finance Receivable Transferred To Held For Sale [Line Items]        
Excess cash loaned back in exchange for subordinated note receivable $ 44,200,000      
Singapore RPA        
Finance Receivable Transferred To Held For Sale [Line Items]        
Financing receivable maximum amount under receivable purchase agreement   $ 11,000,000   SGD 15,000,000
Percent of eligible receivables   90.00%