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Goodwill and Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Apr. 28, 2018 | Jan. 27, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |  |
Goodwill gross | $ 521,607 | $ 517,510
Accumulated impairment losses | (195,767) | $ (195,767)
Beginning balance | 321,743 |
Goodwill, Acquired During Period | 4,097 |
Ending balance | $ 325,840 |

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