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Organization and Basis of Presentation (Acquisitions) (Details) - USD ($) $ in Thousands | Aug. 17, 2018 | May 02, 2018 | Oct. 27, 2019 | Jan. 27, 2019 | Oct. 28, 2018 | Jan. 28, 2018
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Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  | $ 351,141 | $ 351,141 | $ 355,175 | $ 341,897
TrackNet Acquisition |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Purchase price | $ 8,500 |  |  |  |  |
Goodwill |  |  |  | 4,300 |  |
Intangible net assets acquired |  |  |  | 3,000 |  |
Tangible assets acquired |  |  |  | 300 |  |
IC Interconnect, Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  |  | $ 4,900 |  |
Cash paid to to acquire business |  | $ 7,400 |  |  |  |
Intangible net assets acquired |  | $ 2,500 |  |  |  |

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