Accounts Receivable, Contract Assets, and Contract Liabilities - Customer Credit Concentration (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jul. 30, 2022	Jan. 29, 2022
Concentration Risk
Amount	$ 1,118,595	$ 895,898
Customer Concentration Risk | Trade Accounts Receivable and Costs and Estimated Earnings | Lumen Technologies
Concentration Risk
Amount	$ 231,100	$ 166,000
% of Total	20.10%	18.40%
Customer Concentration Risk | Trade Accounts Receivable and Costs and Estimated Earnings | AT&T Inc.
Concentration Risk
Amount	$ 162,300	$ 106,000
% of Total	14.10%	11.70%
Customer Concentration Risk | Trade Accounts Receivable and Costs and Estimated Earnings | Verizon Communications Inc.
Concentration Risk
Amount	$ 147,700	$ 144,300
% of Total	12.90%	16.00%
Customer Concentration Risk | Trade Accounts Receivable and Costs and Estimated Earnings | Comcast Corporation
Concentration Risk
Amount	$ 133,900	$ 113,500
% of Total	11.70%	12.60%