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Accounts Receivable - Narratives (Details) - USD ($) $ in Thousands | Jan. 25, 2020 | Jan. 26, 2019 | Jan. 27, 2018
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Contract assets, net | $ 236,673 | $ 200,724 |
Allowance for recievables | $ 4,582 | 17,702 | $ 998
Windstream |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts Receivable, Gross, Noncurrent |  | 24,800 |
Allowance for recievables |  | $ 16,800 |

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