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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 |

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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 Accumulated amount of 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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- Definition Amount before 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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- 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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