Summary of Significant Accounting Policies - Changes in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at Beginning of Period	$ 2,561	$ 2,026	$ 4,253
Provisions	950	1,300	(1,250)
Write-offs	(310)	(765)	(977)
Balance at End of Period	$ 3,201	$ 2,561	$ 2,026