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Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Thousands
 9 Months Ended
Oct. 27, 2019
Jan. 27, 2019
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 89,088 $ 201,961
Accumulated Amortization (67,652) (167,703)
Total expected amortization expense 21,436 34,258
Core technologies    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 83,088 167,930
Accumulated Amortization (62,674) (136,544)
Total expected amortization expense $ 20,414 31,386
Core technologies | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life 5 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 $ 6,000 34,031
Accumulated Amortization (4,978) (31,159)
Total expected amortization expense $ 1,022 $ 2,872
Customer relationships | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life 3 years  
Customer relationships | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life 10 years