Customer Concentration and Revenue Information - Revenue Concentration Risk (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Jul. 29, 2023	Jul. 30, 2022
Concentration Risk
Contract revenues	$ 1,041,535	$ 972,273	$ 2,087,009	$ 1,848,573
Revenue Benchmark | Customer Concentration Risk
Concentration Risk
Contract revenues	$ 1,041,500	$ 972,300	$ 2,087,000	$ 1,848,600
% of Total	100.00%	100.00%	100.00%	100.00%
Revenue Benchmark | Customer Concentration Risk | AT&T Inc.
Concentration Risk
Contract revenues	$ 174,300	$ 255,900	$ 398,700	$ 493,300
% of Total	16.70%	26.30%	19.10%	26.70%
Revenue Benchmark | Customer Concentration Risk | Lumen Technologies
Concentration Risk
Contract revenues	$ 162,500	$ 127,600	$ 298,900	$ 230,400
% of Total	15.60%	13.10%	14.30%	12.50%
Revenue Benchmark | Customer Concentration Risk | Comcast Corporation
Concentration Risk
Contract revenues	$ 119,500	$ 111,800	$ 240,100	$ 223,000
% of Total	11.50%	11.50%	11.50%	12.10%
Revenue Benchmark | Customer Concentration Risk | Total other customers combined
Concentration Risk
Contract revenues	$ 480,300	$ 396,200	$ 944,400	$ 740,100
% of Total	46.10%	40.80%	45.30%	39.90%
Revenue Benchmark | Customer Concentration Risk | Verizon Communications Inc.
Concentration Risk
Contract revenues	$ 104,900	$ 80,800	$ 204,900	$ 161,800
% of Total	10.10%	8.30%	9.80%	8.80%