Income taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2024	Apr. 30, 2023
Income Tax Disclosure [Abstract]
Effective tax rates	20.80%	21.10%	20.90%	20.80%
Income tax provision included discrete tax benefit due to share-based payment transactions	$ 1,940	$ 583	$ 2,309	$ 1,749