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Summary of Significant Accounting Policies - Changes in Allowance for Doubtful Accounts (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Oct. 31, 2012
Allowance for Doubtful Accounts Receivable [Roll Forward]      
Balance at Beginning of Period $ 4,253us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 6,072us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 2,489us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Provisions (1,250)us-gaap_ProvisionForDoubtfulAccounts 102us-gaap_ProvisionForDoubtfulAccounts 3,754us-gaap_ProvisionForDoubtfulAccounts
Write-offs (977)us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs [1] (1,921)us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs [1] (171)us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs [1]
Balance at End of Period $ 2,026us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 4,253us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 6,072us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
[1] Balances written off, net of recoveries.