Derivative financial instruments - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Maturity of foreign currency forward contracts			90 days
Gains (losses) on foreign currency forward contracts	$ (3,960)	$ (9,080)	$ 12,179	$ (12,678)
Change in unrealized gain (loss) on foreign currency derivative instruments	$ 1,792	$ 10,079	(18,918)	$ 14,041
Other Comprehensive Income (Loss), Net Investment Hedge, Net of Tax			$ (3,611)