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Goodwill and Intangible Assets - Schedule of Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jan. 28, 2018 | Jan. 29, 2017
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 198,961 | $ 174,960
Accumulated Amortization | (141,054) | (113,187)
Net Carrying Amount | 57,907 | 61,773
Core technologies |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 164,930 | 144,930
Accumulated Amortization | (115,628) | (92,940)
Net Carrying Amount | $ 49,302 | 51,990
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 | $ 34,031 | 30,030
Accumulated Amortization | (25,426) | (20,247)
Net Carrying Amount | $ 8,605 | $ 9,783
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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- Definition Finite-Lived Intangible Assets Excluding Fully Amortized Intangible Assets, Accumulated Amortization + References No definition available. + Details
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- Definition Finite-Lived Intangible Assets Excluding Fully Amortized Intangible Assets, Gross + References No definition available. + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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