Geographic Information - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Revenues from External Customers and Long-Lived Assets
Revenue	$ 334,441	$ 159,624	$ 835,553	$ 401,584
United States
Revenues from External Customers and Long-Lived Assets
Revenue	265,605	135,427	669,172	341,892
Other
Revenues from External Customers and Long-Lived Assets
Revenue	$ 68,836	$ 24,197	$ 166,381	$ 59,692