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Income taxes (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Apr. 30, 2023
Apr. 30, 2022
Income Tax Disclosure [Abstract]        
Effective tax rates 21.10% 21.30% 20.80% 21.00%
Income tax provision included discrete tax benefit due to share-based payment transactions $ 583 $ 309 $ 1,749 $ 1,424