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Employee Benefit Plans - Contribution Details (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 27, 2018 | Jan. 25, 2020 | Jan. 26, 2019 | Jul. 29, 2017
Other Plans |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Company Contributions | $ 319 | $ 362 | $ 726 | $ 384

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