CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 26, 2013	Jan. 28, 2012	Jan. 26, 2013	Jan. 28, 2012
REVENUES:
Contract revenues	$ 369,326	$ 267,407	$ 692,613	$ 586,981
EXPENSES:
Costs of earned revenues, excluding depreciation and amortization	301,516	220,239	558,582	475,426
General and administrative	38,827	24,275	67,652	49,633
Depreciation and amortization	20,819	15,528	36,130	31,486
Total	361,162	260,042	662,364	556,545
Total			662,364	556,545
Interest expense, net	(5,748)	(4,177)	(9,946)	(8,350)
Other income, net	428	2,357	2,042	5,317
INCOME BEFORE INCOME TAXES	2,844	5,545	22,345	27,403
PROVISION FOR INCOME TAXES:
Current	1,485	2,082	10,342	7,454
Deferred	(104)	(22)	(1,320)	3,498
Total	1,381	2,060	9,022	10,952
NET INCOME	$ 1,463	$ 3,485	$ 13,323	$ 16,451
Earnings Per Common Share:
Basic earnings per common share	$ 0.04	$ 0.10	$ 0.40	$ 0.49
Diluted earnings per common share	$ 0.04	$ 0.10	$ 0.40	$ 0.48
SHARES USED IN COMPUTING EARNINGS PER COMMON SHARE:
Basic	32,780,667	33,759,015	32,935,305	33,633,596
Diluted	33,514,416	34,636,520	33,607,180	34,431,419