Accumulated Other Comprehensive Income - Component of Accumulated Other Comprehensive Income (loss) (Details) - USD ($)	Jan. 31, 2025	Oct. 31, 2024	Jul. 31, 2024	Apr. 30, 2024	Jan. 31, 2024	Oct. 31, 2023	Jul. 31, 2023	Apr. 30, 2023	Jan. 31, 2023
Accumulated Other Comprehensive Income Loss [Line Items]
Foreign currency translation adjustments	$ 81,519,000				$ 93,840,000				$ 83,005,000
Available-for-sale securities	215,000				169,000				182,000
Cash flow hedges	0				43,000				(171,000)
Unrecognized prior service cost related to defined benefit pension plan	(122,000)				(171,000)				(231,000)
Net actuarial loss related to defined benefit pension plan	(1,631,000)				(1,546,000)				(1,490,000)
Total accumulated other comprehensive income	$ 79,981,000	$ 90,262,000	$ 87,802,000	$ 82,081,000	$ 92,335,000	$ 81,727,000	$ 91,810,000	$ 85,177,000	$ 81,295,000