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Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jul. 26, 2020
Jan. 26, 2020
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 43,300 $ 88,857
Accumulated Amortization (28,148) (68,845)
Total expected amortization expense 15,152 20,012
Core technologies    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 43,300 82,857
Accumulated Amortization (28,148) (63,434)
Total expected amortization expense $ 15,152 19,423
Core technologies | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life 3 years  
Core technologies | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life 8 years  
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 0 6,000
Accumulated Amortization 0 (5,411)
Total expected amortization expense $ 0 $ 589