Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Income Tax Disclosure [Abstract]
Effective tax rates	28.20%	29.50%	25.50%	29.40%
Favorable adjustment to unrecognized tax benefits	$ 1,651		$ 1,136
Additional tax benefit relating to retroactive reinstatement of research and development credit			2,025	$ 2,286
Additional tax benefit related to dividends paid from foreign earnings tax credit			$ 6,184
Tax adjustment related to tax provision		$ (600)