Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Income Tax Disclosure [Abstract]
Effective tax rates	29.50%	29.50%	29.40%	30.10%
Tax adjustment related to tax provision	$ (600)	$ (550)
Additional tax benefit relating to retroactive reinstatement of research and development credit			$ 2,286
Tax benefit related to adjustment to deferred taxes		$ (500)