CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Apr. 27, 2013	Apr. 28, 2012
OPERATING ACTIVITIES:
Net income	$ 20,522	$ 26,096
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	60,660	47,047
Bad debt expense, net	51	180
Gain on sale of fixed assets	(3,867)	(12,578)
Deferred income tax provision (benefit)	(3,958)	4,330
Stock-based compensation	7,275	4,901
Write-off of deferred financing costs	321	0
Amortization of premium on long-term debt	(131)	0
Amortization of debt issuance costs and other	1,192	971
Excess tax benefit from share-based awards	(758)	(1,361)
Change in operating assets and liabilities:
Accounts receivable, net	20,885	16,734
Costs and estimated earnings in excess of billings, net	4,880	(14,789)
Other current assets and inventory	(2,490)	(12,427)
Other assets	43	(146)
Income taxes receivable/payable	5,420	9,383
Accounts payable	(11,572)	1,903
Accrued liabilities, insurance claims, and other liabilities	(7,146)	(1,791)
Net cash provided by operating activities	91,327	68,453
INVESTING ACTIVITIES:
Cash paid for acquisition, net of cash acquired	(318,984)	0
Capital expenditures	45,743	62,790
Proceeds from sale of assets	4,467	20,528
Changes in restricted cash	(31)	550
Net cash used in investing activities	(360,291)	(41,712)
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	310,500	0
Proceeds from Term Loan on Senior Credit Agreement	125,000	0
Principal payments on Senior Credit Agreement	276,063	0
Debt issuance costs	(6,739)	0
Repurchases of common stock	(15,203)	(10,942)
Exercise of stock options and other	3,511	5,299
Restricted stock tax withholdings	(885)	(329)
Excess tax benefit from share-based awards	758	1,361
Principal payments on capital lease obligations	(74)	(186)
Net cash provided by financing activities	234,630	(4,797)
Net (decrease) increase in cash and equivalents	(34,334)	21,944
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	52,581	44,766
CASH AND EQUIVALENTS AT END OF PERIOD	18,247	66,710
Cash paid during the period for:
Interest	10,122	8,220
Income taxes	12,149	2,697
Purchases of capital assets included in accounts payable or other accrued liabilities at period end	$ 2,626	$ 1,683