CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jul. 30, 2016	Jul. 25, 2015	Jul. 26, 2014
OPERATING ACTIVITIES:
Net income	$ 128,740	$ 84,324	$ 39,978
Adjustments to reconcile net income to net cash provided by operating activities, net of acquisitions:
Depreciation and amortization	124,940	96,044	92,772
Deferred income tax provision (benefit)	26,782	1,244	(6,323)
Stock-based compensation	16,850	13,923	12,596
Bad debt expense, net	1,252	465	615
Gain on sale of fixed assets	(9,806)	(7,110)	(10,706)
Write-off of deferred financing fees and premium on long-term debt	2,017	0	0
Amortization of premium on long-term debt	(94)	(397)	(369)
Amortization of debt discount	14,709	0	0
Amortization of debt issuance costs and other	2,875	2,040	1,916
Excess tax benefit from share-based awards	(13,003)	(8,371)	(3,025)
Change in operating assets and liabilities:
Accounts receivable, net	2,729	(40,444)	(16,949)
Costs and estimated earnings in excess of billings, net	(70,957)	(41,021)	(25,356)
Other current assets and inventory	(13,800)	(1,138)	(12,843)
Other assets	(2,936)	(6,875)	(555)
Income taxes receivable/payable	20,148	11,758	6,685
Accounts payable	15,132	7,114	(4,244)
Accrued liabilities, insurance claims, and other liabilities	15,910	30,344	9,993
Net cash provided by operating activities	261,488	141,900	84,185
INVESTING ACTIVITIES:
Cash paid for acquisitions, net of cash acquired	(157,183)	(31,909)	(17,088)
Capital expenditures	(186,011)	(102,997)	(89,136)
Proceeds from sale of assets	10,540	9,392	15,407
Changes in restricted cash	(479)	(538)	(303)
Other investing activities	0	(4,000)	0
Net cash used in investing activities	(333,133)	(130,052)	(91,120)
FINANCING ACTIVITIES:
Proceeds from borrowings on senior credit agreement, including term loans	1,310,000	535,750	502,000
Principal payments on senior credit agreement, including term loans	(1,209,000)	(467,563)	(495,813)
Proceeds from issuance of 0.75% convertible senior notes due 2021	485,000	0	0
Proceeds from sale of warrants	74,690	0	0
Purchase of convertible note hedges	(115,818)	0	0
Principal payments for satisfaction and discharge of 7.125% senior subordinated notes	(277,500)	0	0
Debt issuance costs	(16,376)	(3,854)	0
Repurchases of common stock	(169,997)	(87,146)	(9,999)
Exercise of stock options	2,745	8,922	14,568
Restricted stock tax withholdings	(12,604)	(4,711)	(3,781)
Excess tax benefit from share-based awards	13,003	8,371	3,025
Principal payments on other financing activities	0	(1,000)	(1,000)
Net cash provided by (used in) financing activities	84,143	(11,231)	9,000
Net increase in cash and equivalents	12,498	617	2,065
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	21,289	20,672	18,607
CASH AND EQUIVALENTS AT END OF PERIOD	33,787	21,289	20,672
SUPPLEMENTAL DISCLOSURE OF OTHER CASH FLOW ACTIVITIES AND NON-CASH INVESTING AND FINANCING ACTIVITIES:
Cash paid for interest	15,917	25,369	25,291
Cash paid for taxes, net	31,159	39,057	26,738
Purchases of capital assets included in accounts payable or other accrued liabilities at period end	$ 7,196	$ 2,372	$ 2,651