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Summary of Significant Accounting Policies - Changes in Allowance for Doubtful Accounts (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
Allowance for Doubtful Accounts Receivable [Roll Forward]      
Balance at Beginning of Period $ 2,026 $ 4,253 $ 6,072
Provisions 1,300 (1,250) 102
Write-offs [1] (765) (977) (1,921)
Balance at End of Period $ 2,561 $ 2,026 $ 4,253
[1] Balances written off, net of recoveries