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Geographic Information (Details)
$ in Thousands
 12 Months Ended
Jan. 31, 2021
USD ($)
segment
Jan. 31, 2020
USD ($)
Jan. 31, 2019
USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]      
Number of operating segments | segment 1    
Number of reportable segments | segment 1    
Total revenue $ 1,453,047 $ 973,971 $ 700,969
Total long-lived assets 324,391 278,126  
U.S.      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenue 1,166,004 802,480 581,011
Total long-lived assets 221,549 182,288  
Ireland      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total long-lived assets 66,670 66,925  
International      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenue 287,043 171,491 $ 119,958
Total long-lived assets $ 36,172 $ 28,913