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Acquisitions- Additional Information (Details)
3 Months Ended 9 Months Ended
Mar. 05, 2021
USD ($)
Sep. 30, 2020
USD ($)
segment
Oct. 31, 2021
USD ($)
Oct. 31, 2021
USD ($)
segment
Jan. 31, 2021
USD ($)
Business Acquisition [Line Items]          
Goodwill     $ 373,889,000 $ 373,889,000 $ 83,566,000
Number of reportable segments | segment       1  
Humio Limited          
Business Acquisition [Line Items]          
Voting equity interest acquired 100.00%        
Total consideration transferred $ 370,300,000        
Payments to acquire businesses, gross 353,800,000        
Cash acquired from acquisition 12,500,000        
Fair value of replacement equity awards 4,000,000        
Identified intangible assets 75,600,000        
Net tangible assets acquired 3,400,000        
Goodwill $ 291,300,000        
Acquisition related costs     300,000 $ 5,000,000  
Preempt          
Business Acquisition [Line Items]          
Voting equity interest acquired   100.00%      
Total consideration transferred   $ 91,200,000      
Payments to acquire businesses, gross   87,400,000      
Fair value of replacement equity awards   3,800,000      
Identified intangible assets   16,385,000      
Goodwill   $ 75,300,000      
Number of reportable segments | segment   1      
Acquisition related costs     $ 0 $ 300,000  
Net tangible assets acquired   $ (500,000)