CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Oct. 28, 2017	Oct. 29, 2016
REVENUES:
Contract revenues	$ 756,215	$ 799,223
EXPENSES:
Costs of earned revenues, excluding depreciation and amortization	600,847	614,990
General and administrative (including stock-based compensation expense of $7.4 million and $5.7 million, respectively)	64,562	60,204
Depreciation and amortization	42,651	34,546
Total	708,060	709,740
Interest expense, net	(9,707)	(9,067)
Other income, net	5,931	940
Income before income taxes	44,379	81,356
Provision (benefit) for income taxes:
Current	15,085	28,694
Deferred	518	1,612
Total provision for income taxes	15,603	30,306
Net income	$ 28,776	$ 51,050
Earnings per common share:
Basic earnings per common share (in dollars per share)	$ 0.93	$ 1.62
Diluted earnings per common share (in dollars per share)	$ 0.90	$ 1.59
Shares used in computing earnings per common share:
Basic (in shares)	31,061,448	31,429,493
Diluted (in shares)	31,891,574	32,200,287