Stockholders' Equity - Summary of Changes In Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 2,016,114	$ 1,920,158
Other comprehensive (loss) income, net of tax	(4,085)	2,462
Ending balance	2,027,004	1,955,537
Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	8,825	7,612
Other comprehensive (loss) income, net of tax	(4,085)	2,462
Ending balance	4,740	10,074
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	8,925	8,231
Other comprehensive (loss) income, net of tax	(3,574)	2,319
Ending balance	5,351	10,550
Unrealized Loss on Marketable Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(100)	(619)
Other comprehensive (loss) income, net of tax	(511)	143
Ending balance	$ (611)	$ (476)