Revenue and Performance Obligations - Changes in Deferred Revenue and Unbilled Accounts Receivable (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Change in Contract with Customer, Asset and Liability [Abstract]
Balance, beginning of period	$ 223,289	$ 147,298
Deferred revenue billings including reclassification to deferred revenue from customer deposits	98,094	57,663
Recognition of revenue, net of change in unbilled accounts receivable	(101,455)	(65,969)
Balance, end of period	219,928	138,992
Revenue billed as of the end of the period	101,455	65,969
Increase (decrease) in total unbilled accounts receivable	(558)	943
Revenue reported per consolidated statements of operations	$ 100,897	$ 66,912