Supplemental Consolidating Financial Statements - Cash Flows (Details) (USD $)	12 Months Ended
	Jul. 27, 2013	Jul. 28, 2012	Jul. 30, 2011	Jul. 27, 2013 Parent	Jul. 28, 2012 Parent	Jul. 30, 2011 Parent	Jul. 27, 2013 Issuer	Jul. 28, 2012 Issuer	Jul. 30, 2011 Issuer	Jul. 27, 2013 Subsidiary Guarantors	Jul. 28, 2012 Subsidiary Guarantors	Jul. 30, 2011 Subsidiary Guarantors	Jul. 27, 2013 Non-Guarantor Subsidiaries	Jul. 28, 2012 Non-Guarantor Subsidiaries	Jul. 30, 2011 Non-Guarantor Subsidiaries	Jul. 27, 2013 Eliminations and Reclassifications	Jul. 28, 2012 Eliminations and Reclassifications	Jul. 30, 2011 Eliminations and Reclassifications
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 106,744,000	$ 65,125,000	$ 43,857,000	$ 6,952,000	$ 6,755,000	$ 7,979,000	$ (9,612,000)	$ (8,774,000)	$ (12,343,000)	$ 112,176,000	$ 69,823,000	$ 53,611,000	$ (2,772,000)	$ (2,679,000)	$ (5,390,000)	$ 0	$ 0	$ 0
INVESTING ACTIVITIES:
Cash paid for acquisition, net of cash acquired	(330,291,000)	0	(36,451,000)	0		0	0		(27,500,000)	(330,291,000)		(8,951,000)	0		0	0		0
Capital expenditures	(64,650,000)	(77,612,000)	(61,457,000)	(8,151,000)	(3,685,000)	(1,746,000)	0	0	0	(51,647,000)	(69,362,000)	(53,346,000)	(4,852,000)	(4,565,000)	(6,365,000)	0	0	0
Proceeds from sale of assets	5,827,000	24,783,000	12,305,000	0	0	0	0	0	0	5,770,000	19,211,000	11,645,000	57,000	5,572,000	660,000	0	0	0
Capital contributions to subsidiaries, net	0	0	0	0	0	0	1,816,000	(4,943,000)	(52,492,000)	0	0	0	0	0	0	(1,816,000)	4,943,000	52,492,000
Investment in subsidiaries	0			0			2,600,000			0			0			(2,600,000)
Changes in restricted cash	60,000	926,000	225,000	60,000	926,000	25,000	0	0	0	0	0	200,000	0	0	0	0	0	0
Net cash used in investing activities	(389,054,000)	(51,903,000)	(85,378,000)	(8,091,000)	(2,759,000)	(1,721,000)	(784,000)	(4,943,000)	(79,992,000)	(376,168,000)	(50,151,000)	(50,452,000)	(4,795,000)	1,007,000	(5,705,000)	784,000	4,943,000	52,492,000
FINANCING ACTIVITIES:
Proceeds from issuance of 7.125% senior subordinated notes due 2021, (including $3.8 million premium on issuance)	93,825,000	0	187,500,000	0		0	93,825,000		187,500,000	0		0	0		0	0		0
Proceeds from Term Loan on Senior Credit Agreement	125,000,000	0	0	125,000,000			0			0			0			0
Proceeds from borrowings on Senior Credit Agreement	404,500,000	0	0	404,500,000			0			0			0			0
Purchase of 8.125% senior subordinated notes due 2015	0	0	(135,350,000)			0			(135,350,000)			0			0			0
Principal payments on Senior Credit Agreement	(358,625,000)	0	0	(358,625,000)			0			0			0			0
Debt issuance cost	(6,739,000)		(5,177,000)	(4,158,000)		(456,000)	(2,581,000)		(4,721,000)	0		0	0		0	0		0
Repurchases of common stock	(15,203,000)	(12,960,000)	(64,548,000)	(15,203,000)	(12,960,000)	(64,548,000)	0	0	0	0	0	0	0	0	0	0	0	0
Exercise of stock options and other	5,253,000	6,490,000	1,321,000	5,253,000	6,490,000	1,321,000	0	0	0	0	0	0	0	0	0	0	0	0
Restricted stock tax withholdings	(884,000)	(329,000)	(197,000)	(884,000)	(329,000)	(197,000)	0	0	0	0	0	0	0	0	0	0	0	0
Excess tax benefit from share-based awards	1,283,000	1,625,000	0	1,283,000	1,625,000		0	0		0	0		0	0		0	0
Principal payments on capital lease obligations	(74,000)	(233,000)	(582,000)	0	0	0	0	0	0	(74,000)	(233,000)	(582,000)	0	0	0	0	0	0
Intercompany funding	0	0	0	(156,027,000)	1,178,000	57,622,000	(80,848,000)	13,717,000	44,906,000	230,669,000	(12,484,000)	(60,827,000)	6,990,000	2,532,000	10,791,000	(784,000)	(4,943,000)	(52,492,000)
Net cash provided by financing activities	248,336,000	(5,407,000)	(17,033,000)	1,139,000	(3,996,000)	(6,258,000)	10,396,000	13,717,000	92,335,000	230,595,000	(12,717,000)	(61,409,000)	6,990,000	2,532,000	10,791,000	(784,000)	(4,943,000)	(52,492,000)
Net (decrease) increase in cash and equivalents	(33,974,000)	7,815,000	(58,554,000)	0	0	0	0	0	0	(33,397,000)	6,955,000	(58,250,000)	(577,000)	860,000	(304,000)	0	0	0
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	52,581,000	44,766,000	103,320,000	0	0	0	0	0	0	51,563,000	44,608,000	102,858,000	1,018,000	158,000	462,000	0	0	0
CASH AND EQUIVALENTS AT END OF PERIOD	$ 18,607,000	$ 52,581,000	$ 44,766,000	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 18,166,000	$ 51,563,000	$ 44,608,000	$ 441,000	$ 1,018,000	$ 158,000	$ 0	$ 0	$ 0