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Acquisitions, Goodwill and Intangible Assets (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 05, 2020
Nov. 01, 2019
Oct. 01, 2019
Sep. 13, 2019
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2020
Oct. 31, 2019
Jan. 31, 2020
Business Acquisition                  
Goodwill         $ 1,301,073   $ 1,301,073   $ 1,292,840
Common stock, shares issued         161,701,267   161,701,267   157,787,548
Amortization of intangible assets         $ 13,800 $ 10,100 $ 43,100 $ 24,300  
Plumbr                  
Business Acquisition                  
Percentage of voting interests acquired 100.00%                
Purchase price $ 11,800                
Acquired liabilities 300                
Goodwill $ 8,200                
Acquired intangible assets, remaining useful life 3 years                
Fair value of equity awards under holdback agreement $ 4,600                
Plumbr | Developed Technology                  
Business Acquisition                  
Acquired fair value of finite-lived intangible assets $ 3,900                
SignalFx                  
Business Acquisition                  
Percentage of voting interests acquired     100.00%            
Purchase price     $ 961,400            
Acquired fair value of finite-lived intangible assets     173,700            
Goodwill     728,900            
Purchase price paid in cash     619,100            
Fair value of replacement equity awards attributable to pre-acquisition service     $ 324,500            
Common stock, shares issued     2,771,482            
Fair value of replacement equity awards attributable to pre-acquisition service     $ 17,800            
Net assets (liabilities) acquired     62,100            
Net deferred tax liabilities assumed     3,300            
Replacement equity awards     $ 104,700            
Omnition                  
Business Acquisition                  
Percentage of voting interests acquired       100.00%          
Purchase price       $ 52,500          
Acquired fair value of finite-lived intangible assets       8,000          
Goodwill       44,500          
Purchase price paid in cash       31,600          
Fair value of replacement equity awards attributable to pre-acquisition service       $ 20,200          
Common stock, shares issued       176,989          
Fair value of replacement equity awards attributable to pre-acquisition service       $ 700          
Replacement equity awards       $ 36,600          
Streamlio                  
Business Acquisition                  
Percentage of voting interests acquired   100.00%              
Purchase price   $ 19,800              
Acquired fair value of finite-lived intangible assets   3,600              
Goodwill   16,100              
Purchase price paid in cash   18,700              
Fair value of replacement equity awards attributable to pre-acquisition service   1,100              
Net assets (liabilities) acquired   100              
Replacement equity awards   $ 4,200