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Acquisitions - Narrative (Details) - USD ($)
$ in Thousands
Aug. 17, 2018
May 02, 2018
Jan. 31, 2021
Jan. 26, 2020
Jan. 27, 2019
Business Acquisition [Line Items]          
Goodwill     $ 351,141 $ 351,141  
Trackio International AG          
Business Acquisition [Line Items]          
Purchase price $ 8,500        
Goodwill 4,300       $ 4,316
Finite-lived intangible asset 3,000       $ 3,000
Tangible assets $ 300        
ICI          
Business Acquisition [Line Items]          
Purchase price   $ 7,400      
Goodwill   4,900      
Tangible assets   $ 2,500