Valuation and Qualifying Accounts Schedule II (Detail) - Allowance for Doubtful Accounts - USD ($) $ in Thousands		12 Months Ended
		Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		$ 2,650	$ 2,500	$ 2,200
Charged to Costs and Expenses		610	178	300
Deductions Describe	[1]	0	28	0
Balance at End of Period		$ 3,260	$ 2,650	$ 2,500

[1] Uncollectible accounts written off, net of recoveries