CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	May 01, 2021	Apr. 25, 2020
Income Statement [Abstract]
Contract revenues	$ 727,497	$ 814,322
Costs of earned revenues, excluding depreciation and amortization	620,011	680,206
General and administrative	67,011	65,887
Depreciation and amortization	39,079	45,871
Goodwill impairment charge	0	53,264
Total	726,101	845,228
Interest expense, net	(5,877)	(12,457)
(Loss) gain on debt extinguishment	(62)	12,504
Other income, net	2,717	1,118
Loss before income taxes	(1,826)	(29,741)
(Benefit) provision for income taxes	(2,724)	2,677
Net income (loss)	$ 898	$ (32,418)
Earnings (loss) per common share:
Basic earnings per common share (in dollars per share)	$ 0.03	$ (1.03)
Diluted earnings per common share (in dollars per share)	$ 0.03	$ (1.03)
Shares used in computing earnings (loss) per common share:
Basic (in shares)	30,675,625	31,603,498
Diluted (in shares)	31,299,469	31,603,498