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Accounts Receivable, Contract Assets, and Contract Liabilities - Customer Credit Concentration (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 29, 2022 | Jan. 30, 2021 | Jan. 25, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount | $ 895,898 | $ 858,123 |
% of Total | 100.00% | 100.00% | 100.00%
Lumen Technologies | Trade Accounts Receivable and Costs and Estimated Earnings | Customer Concentration Risk |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount | $ 166,000 | $ 173,500 |
% of Total | 18.40% | 16.60% |
Verizon Communications Inc. | Trade Accounts Receivable and Costs and Estimated Earnings | Customer Concentration Risk |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount | $ 144,300 | $ 389,900 |
% of Total | 16.00% | 37.40% |
Comcast Corporation | Trade Accounts Receivable and Costs and Estimated Earnings | Customer Concentration Risk |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount | $ 113,500 | $ 131,700 |
% of Total | 12.60% | 12.60% |
AT&T Inc. | Trade Accounts Receivable and Costs and Estimated Earnings | Customer Concentration Risk |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount | $ 106,000 | $ 71,700 |
% of Total | 11.70% | 6.90% |

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