CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jan. 26, 2013	Jan. 28, 2012
OPERATING ACTIVITIES:
Net income	$ 13,323	$ 16,451
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	36,130	31,486
Bad debt expense, net	32	68
Gain on sale of fixed assets	(2,407)	(5,139)
Deferred income tax provision (benefit)	(1,320)	3,498
Stock-based compensation	4,762	2,968
Write-off of deferred financing costs	321	0
Amortization of premium on long-term debt	(42)	0
Amortization of debt issuance costs and other	734	646
Excess tax benefit from share-based awards	(610)	(979)
Change in operating assets and liabilities:
Accounts receivable, net	27,528	35,257
Costs and estimated earnings in excess of billings, net	39,753	7,919
Other current assets and inventory	(3,518)	(13,927)
Other assets	(187)	239
Income taxes receivable/payable	(906)	5,332
Accounts payable	(11,897)	(799)
Accrued liabilities, insurance claims, and other liabilities	(10,455)	(12,169)
Net cash provided by operating activities	91,241	70,851
INVESTING ACTIVITIES:
Cash paid for acquisition, net of cash acquired	(314,771)	0
Capital expenditures	29,029	43,438
Proceeds from sale of assets	2,845	8,942
Changes in restricted cash	(31)	550
Net cash used in investing activities	(340,986)	(33,946)
FINANCING ACTIVITIES:
Proceeds from issuance of 7.125% senior subordinated notes due 2021 (including $3.8 million premium)	93,825	0
Proceeds from borrowings on Senior Credit Agreement	180,500	0
Proceeds from Term Loan on Senior Credit Agreement	125,000	0
Principal payments on Senior Credit Agreement	160,500	0
Debt issuance costs	(6,409)	0
Repurchases of common stock	(15,203)	0
Exercise of stock options and other	2,890	4,013
Restricted stock tax withholdings	(885)	(328)
Excess tax benefit from share-based awards	610	979
Principal payments on capital lease obligations	(74)	(140)
Net cash provided by financing activities	219,754	4,524
Net (decrease) increase in cash and equivalents	(29,991)	41,429
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	52,581	44,766
CASH AND EQUIVALENTS AT END OF PERIOD	22,590	86,195
Cash paid during the period for:
Interest	8,854	7,727
Income taxes	11,239	2,486
Purchases of capital assets included in accounts payable or other accrued liabilities at period end	2,471	3,066
Accrued costs for debt issuance included in accounts payable and accrued liabilities at period end	130	0
Accrued remaining purchase price of acquisition included in accrued liabilities at period end	$ 4,710	$ 0