Revenue and Performance Obligations - Changes in Deferred Revenue and Unbilled Accounts Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Change in Contract with Customer, Asset and Liability [Abstract]
Balance, beginning of period	$ 219,928	$ 138,992	$ 223,289	$ 147,297
Deferred revenue billings including reclassification to deferred revenue from customer deposits	121,434	82,456	219,528	140,120
Recognition of revenue, net of change in unbilled accounts receivable	(114,550)	(75,343)	(216,005)	(141,312)
Balance, end of period	226,812	146,105	226,812	146,105
Revenue billed as of the end of the period	114,550	75,343	216,005	141,312
Increase (decrease) in total unbilled accounts receivable	(687)	(230)	(1,245)	713
Revenue reported per consolidated statements of operations	$ 113,863	$ 75,113	$ 214,760	$ 142,025