Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 28, 2023	Oct. 29, 2022	Jul. 30, 2022	Apr. 30, 2022	Jan. 29, 2022	Oct. 30, 2021	Jul. 31, 2021	May 01, 2021	Jan. 28, 2023	Jan. 29, 2022	Jan. 30, 2021
Quarterly Financial Information Disclosure [Abstract]
Contract revenues	$ 917,466	$ 1,042,423	$ 972,273	$ 876,300	$ 761,481	$ 853,973	$ 787,568	$ 727,497	$ 3,808,462	$ 3,130,519	$ 3,199,165
Costs of earned revenues, excluding depreciation and amortization	765,658	850,897	797,980	745,730	656,634	705,865	651,367	620,011	3,160,264	2,633,877	2,641,989
Gross profit	151,808	191,526	174,293	130,570	104,847	148,108	136,201	107,486
Net Income	$ 24,809	$ 54,012	$ 43,856	$ 19,536	$ 794	$ 28,717	$ 18,165	$ 898	$ 142,213	$ 48,574	$ 34,337
Basic earnings per common share (in dollars per share)	$ 0.84	$ 1.83	$ 1.48	$ 0.66	$ 0.03	$ 0.95	$ 0.60	$ 0.03	$ 4.81	$ 1.60	$ 1.08
Diluted earnings per common share (in dollars per share)	$ 0.83	$ 1.80	$ 1.46	$ 0.65	$ 0.03	$ 0.94	$ 0.59	$ 0.03	$ 4.74	$ 1.57	$ 1.07