CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 24, 2015	Jan. 25, 2014	Jan. 24, 2015	Jan. 25, 2014
REVENUES:
Contract revenues	$ 441,081	$ 390,518	$ 951,470	$ 903,238
EXPENSES:
Costs of earned revenues, excluding depreciation and amortization	355,429	327,353	758,898	737,472
General and administrative	41,815	38,562	86,511	81,637
Depreciation and amortization	23,264	23,435	46,193	46,987
Total	420,508	389,350	891,602	866,096
Interest expense, net	(6,730)	(6,800)	(13,480)	(13,686)
Other income, net	1,735	595	3,530	2,607
Income (loss) before income taxes	15,578	(5,037)	49,918	26,063
Provision (benefit) for income taxes:
Current	1,309	(2,755)	18,308	9,572
Deferred	4,837	785	1,371	898
Total provision (benefit) for income taxes	6,146	(1,970)	19,679	10,470
Net income (loss)	$ 9,432	$ (3,067)	$ 30,239	$ 15,593
Earnings (loss) per common share:
Basic earnings (loss) per common share (in dollars per share)	$ 0.28	$ (0.09)	$ 0.89	$ 0.46
Diluted earnings (loss) per common share (in dollars per share)	$ 0.27	$ (0.09)	$ 0.86	$ 0.45
Shares used in computing earnings (loss) per common share:
Basic (in shares)	34,125,829	33,836,099	34,067,983	33,629,884
Diluted (in shares)	35,127,398	33,836,099	35,122,530	34,767,945