Stock-Based Compensation - Milestone Options Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, expense	$ 64,677	$ 52,846	$ 123,230	$ 108,395
Milestone Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			1,404,605
Share-based payment arrangement, expense	900	$ 900	$ 1,800	$ 1,800
Cost not yet recognized, amount	$ 7,400		$ 7,400
Cost not yet recognized, period for recognition			2 years 1 month 6 days