Customer Concentration and Revenue Information - Revenue Concentration Risk (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 29, 2023	Apr. 30, 2022
Concentration Risk
Contract revenues	$ 1,045,474	$ 876,300
Revenue Benchmark | Customer Concentration Risk
Concentration Risk
Contract revenues	$ 1,045,500	$ 876,300
% of Total	100.00%	100.00%
Revenue Benchmark | Customer Concentration Risk | AT&T Inc.
Concentration Risk
Contract revenues	$ 224,400	$ 237,400
% of Total	21.50%	27.10%
Revenue Benchmark | Customer Concentration Risk | Lumen Technologies
Concentration Risk
Contract revenues	$ 136,400	$ 102,800
% of Total	13.00%	11.70%
Revenue Benchmark | Customer Concentration Risk | Comcast Corporation
Concentration Risk
Contract revenues	$ 120,600	$ 111,300
% of Total	11.50%	12.70%
Revenue Benchmark | Customer Concentration Risk | Total other customers combined
Concentration Risk
Contract revenues	$ 564,100	$ 424,800
% of Total	54.00%	48.50%