Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Income Tax [Line Items]
Effective tax rates	29.50%	29.40%	30.10%	28.70%
Recorded an adjustment related to our tax provision that reduced income taxes	$ (550)	$ (430)
Additional tax benefit relating to retroactive reinstatement of research and development credit				1,700
Foreign [Member]
Income Tax [Line Items]
Unrecognized tax benefits				900
Foreign [Member] | United Kingdom [Member]
Income Tax [Line Items]
Recorded a tax benefit related an adjustment to deferred taxes		(215)
State [Member]
Income Tax [Line Items]
Recorded a tax benefit related an adjustment to deferred taxes	$ (500)