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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 |

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