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Deferred Contract Acquisition and Fulfillment Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Jan. 31, 2019
Capitalized Contract Cost, Net [Roll Forward]      
Amortization of deferred contract acquisitions and fulfillments costs $ (99,384) $ (69,747) $ (42,112)
Contract acquisition costs      
Capitalized Contract Cost, Net [Roll Forward]      
Beginning balance 155,697 115,985  
Additions to deferred contract acquisition and fulfillment costs 185,970 99,382  
Amortization of deferred contract acquisitions and fulfillments costs (81,132) (58,192)  
Cumulative translation adjustment 1,984 (1,478)  
Ending balance 262,519 155,697 115,985
Contract fulfillment costs      
Capitalized Contract Cost, Net [Roll Forward]      
Beginning balance 8,218 3,432  
Additions to deferred contract acquisition and fulfillment costs 22,540 16,341  
Amortization of deferred contract acquisitions and fulfillments costs (18,252) (11,555)  
Ending balance $ 12,506 $ 8,218 $ 3,432