Income taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Income Tax Disclosure [Abstract]
Effective tax rates	21.50%	21.10%	21.10%	20.90%
Income tax provision included discrete tax benefit due to share-based payment transactions	$ 537	$ 996	$ 2,846	$ 2,745