CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 26, 2019	Oct. 27, 2018	Oct. 26, 2019	Oct. 27, 2018
REVENUES:
Contract revenues	$ 884,115	$ 848,237	$ 2,602,079	$ 2,379,081
EXPENSES:
Costs of earned revenues, excluding depreciation and amortization	724,378	687,164	2,146,527	1,929,113
General and administrative	69,875	68,763	193,613	195,601
Depreciation and amortization	47,356	45,533	140,941	133,694
Costs and Expenses	841,609	801,460	2,481,081	2,258,408
Interest expense, net	(13,128)	(11,310)	(38,239)	(31,922)
Other income, net	(1,407)	(2,817)	(11,111)	(14,686)
Income before income taxes	30,785	38,284	93,870	103,437
Provision (benefit) for income taxes:
Total provision for income taxes	6,556	10,454	25,466	28,476
Net income	$ 24,229	$ 27,830	$ 68,404	$ 74,961
Earnings per common share:
Basic earnings per common share (in dollars per share)	$ 0.77	$ 0.89	$ 2.17	$ 2.40
Diluted earnings per common share (in dollars per share)	$ 0.76	$ 0.87	$ 2.15	$ 2.34
Shares used in computing earnings per common share:
Basic (in shares)	31,502,543	31,246,591	31,480,759	31,214,172
Diluted (in shares)	31,826,845	31,834,542	31,811,505	32,065,229