Income Taxes - Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 3,336	$ 6,258	$ 5,812
Additions based on tax positions related to the current year	529	522	288
Additions for tax positions of prior years	621	310	331
Reductions for tax positions of prior years	(150)	(140)	(28)
Settlements		(3,091)
Lapse of statute of limitations	(555)	(523)	(145)
Balance at end of year	$ 3,781	$ 3,336	$ 6,258