CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 31, 2010
OPERATING ACTIVITIES:
Net income	$ 39,378	$ 16,107	$ 5,849
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	62,693	62,533	63,607
Bad debt expense (recovery), net	186	(23)	198
Gain on sale of fixed assets	(15,430)	(10,216)	(7,677)
Write-off of deferred financing costs	0	2,337	0
Deferred income tax provision	9,874	14,728	1,921
Non-cash stock-based compensation	6,782	4,409	3,351
Amortization of debt issuance costs	1,297	1,295	1,114
Excess tax benefit from share-based awards	(1,625)	0	(69)
Other	(105)	87	52
Change in operating assets and liabilities:
Accounts receivable, net	(3,421)	(21,665)	4,617
Costs and estimated earnings in excess of billings, net	(35,693)	(23,157)	776
Other current assets and inventory	(6,403)	(5,014)	(6,348)
Other assets	62	617	(1,004)
Income taxes receivable	5,747	(5,025)	3,294
Accounts payable	2,978	2,580	(1,557)
Accrued liabilities, insurance claims, and other liabilities	(1,195)	4,264	(13,986)
Net cash provided by operating activities	65,125	43,857	54,138
INVESTING ACTIVITIES:
Capital expenditures	(77,612)	(61,457)	(55,376)
Proceeds from sale of assets	24,783	12,305	8,768
Cash paid for acquisitions	0	(36,451)	0
Changes in restricted cash	926	225	0
Net cash used in investing activities	(51,903)	(85,378)	(46,608)
FINANCING ACTIVITIES:
Repurchases of common stock	(12,960)	(64,548)	(4,489)
Exercise of stock options and other	6,490	1,321	33
Restricted stock tax withholdings	(329)	(197)	(274)
Excess tax benefit from share-based awards	1,625	0	69
Principal payments on capital lease obligations	(233)	(582)	(1,023)
Debt issuance costs	0	(5,177)	(3,233)
Proceeds from issuance of 7.125% senior subordinated notes due 2021	0	187,500	0
Purchase of 8.125% senior subordinated notes due 2015	0	(135,350)	0
Net cash used in financing activities	(5,407)	(17,033)	(8,917)
Net increase (decrease) in cash and equivalents	7,815	(58,554)	(1,387)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	44,766	103,320	104,707
CASH AND EQUIVALENTS AT END OF PERIOD	52,581	44,766	103,320
Cash paid during the period for:
Interest	15,443	17,296	13,131
Income taxes	10,722	3,481	6,208
Purchases of capital assets included in accounts payable or other accrued liabilities at period end	$ 4,593	$ 10,173	$ 885