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Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 28, 2019
Jan. 27, 2019
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 201,961 $ 201,961
Accumulated amortization (172,846) (167,703)
Net carrying amount 29,115 34,258
Core Technologies [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 167,930 167,930
Accumulated amortization (140,704) (136,544)
Net carrying amount $ 27,226 31,386
Core Technologies [Member] | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life 5 years  
Core Technologies [Member] | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life 8 years  
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 34,031 34,031
Accumulated amortization (32,142) (31,159)
Net carrying amount $ 1,889 $ 2,872
Customer Relationships [Member] | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life 3 years  
Customer Relationships [Member] | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life 10 years