Income taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022
Income Tax Disclosure [Abstract]
Effective tax rates	21.10%	21.40%	20.90%	21.20%
Income tax provision included discrete tax benefit due to share-based payment transactions	$ 996	$ 115	$ 2,745	$ 1,539