Supplemental Consolidating Financial Statements - Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jan. 25, 2014	Jan. 26, 2013	Jul. 27, 2013
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 67,866	$ 91,241
Payments to Acquire Businesses, Net of Cash Acquired	0	(314,771)
INVESTING ACTIVITIES:
Capital expenditures	(49,240)	(29,029)
Proceeds from sale of assets	4,964	2,845
Return of capital from subsidiaries	0
Investment in subsidiaries	0	0
Changes in restricted cash	(305)	(31)
Net cash used in investing activities	(44,581)	(340,986)
FINANCING ACTIVITIES:
Proceeds from borrowings on senior Credit Agreement	221,000	180,500
Proceeds from Issuance of Senior Long-term Debt	0	93,825
Proceeds from issuance of long-term debt	0	125,000
Principal payments on Senior Credit Agreement	(247,125)	(160,500)
Debt Issuance Cost	0	(6,409)
Repurchases of common stock	(9,999)	(15,203)	(15,203)
Exercise of stock options and other	11,869	2,890
Restricted stock tax withholdings	(3,590)	(885)
Excess tax benefit from share-based awards	2,297	610
Principal payments on capital lease obligations	0	(74)
Intercompany funding	0	0
Net cash provided by financing activities	(25,548)	219,754
Net (decrease) increase in cash and equivalents	(2,263)	(29,991)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	18,607	52,581	52,581
CASH AND EQUIVALENTS AT END OF PERIOD	16,344	22,590	18,607
Parent
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(4,085)	(832)
Payments to Acquire Businesses, Net of Cash Acquired		0
INVESTING ACTIVITIES:
Capital expenditures	(3,351)	(4,508)
Proceeds from sale of assets	0	0
Return of capital from subsidiaries	0
Investment in subsidiaries	0	0
Changes in restricted cash	(305)	(31)
Net cash used in investing activities	(3,656)	(4,539)
FINANCING ACTIVITIES:
Proceeds from borrowings on senior Credit Agreement	221,000	180,500
Proceeds from Issuance of Senior Long-term Debt		0
Proceeds from issuance of long-term debt		125,000
Principal payments on Senior Credit Agreement	(247,125)	(160,500)
Debt Issuance Cost		(4,128)
Repurchases of common stock	(9,999)	(15,203)
Exercise of stock options and other	11,869	2,890
Restricted stock tax withholdings	(3,590)	(885)
Excess tax benefit from share-based awards	2,297	610
Principal payments on capital lease obligations		0
Intercompany funding	33,289	(122,913)
Net cash provided by financing activities	7,741	5,371
Net (decrease) increase in cash and equivalents	0	0
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	0	0	0
CASH AND EQUIVALENTS AT END OF PERIOD	0	0
Issuer
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(6,135)	(4,200)
Payments to Acquire Businesses, Net of Cash Acquired		0
INVESTING ACTIVITIES:
Capital expenditures	0	0
Proceeds from sale of assets	0	0
Return of capital from subsidiaries	683
Investment in subsidiaries	(800)	1,816
Changes in restricted cash	0	0
Net cash used in investing activities	(117)	1,816
FINANCING ACTIVITIES:
Proceeds from borrowings on senior Credit Agreement	0	0
Proceeds from Issuance of Senior Long-term Debt		93,825
Proceeds from issuance of long-term debt		0
Principal payments on Senior Credit Agreement	0	0
Debt Issuance Cost		(2,281)
Repurchases of common stock	0	0
Exercise of stock options and other	0	0
Restricted stock tax withholdings	0	0
Excess tax benefit from share-based awards	0	0
Principal payments on capital lease obligations		0
Intercompany funding	6,252	(89,160)
Net cash provided by financing activities	6,252	2,384
Net (decrease) increase in cash and equivalents	0	0
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	0	0	0
CASH AND EQUIVALENTS AT END OF PERIOD	0	0
Subsidiary Guarantors
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	79,911	96,059
Payments to Acquire Businesses, Net of Cash Acquired		(314,771)
INVESTING ACTIVITIES:
Capital expenditures	(43,150)	(22,275)
Proceeds from sale of assets	3,361	2,798
Return of capital from subsidiaries	0
Investment in subsidiaries	0	0
Changes in restricted cash	0	0
Net cash used in investing activities	(39,789)	(334,248)
FINANCING ACTIVITIES:
Proceeds from borrowings on senior Credit Agreement	0	0
Proceeds from Issuance of Senior Long-term Debt		0
Proceeds from issuance of long-term debt		0
Principal payments on Senior Credit Agreement	0	0
Debt Issuance Cost		0
Repurchases of common stock	0	0
Exercise of stock options and other	0	0
Restricted stock tax withholdings	0	0
Excess tax benefit from share-based awards	0	0
Principal payments on capital lease obligations		(74)
Intercompany funding	(43,076)	208,228
Net cash provided by financing activities	(43,076)	208,154
Net (decrease) increase in cash and equivalents	(2,954)	(30,035)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	18,166	51,563	51,563
CASH AND EQUIVALENTS AT END OF PERIOD	15,212	21,528
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(1,825)	214
Payments to Acquire Businesses, Net of Cash Acquired		0
INVESTING ACTIVITIES:
Capital expenditures	(2,739)	(2,246)
Proceeds from sale of assets	1,603	47
Return of capital from subsidiaries	0
Investment in subsidiaries	0	0
Changes in restricted cash	0	0
Net cash used in investing activities	(1,136)	(2,199)
FINANCING ACTIVITIES:
Proceeds from borrowings on senior Credit Agreement	0	0
Proceeds from Issuance of Senior Long-term Debt		0
Proceeds from issuance of long-term debt		0
Principal payments on Senior Credit Agreement	0	0
Debt Issuance Cost		0
Repurchases of common stock	0	0
Exercise of stock options and other	0	0
Restricted stock tax withholdings	0	0
Excess tax benefit from share-based awards	0	0
Principal payments on capital lease obligations		0
Intercompany funding	3,652	2,029
Net cash provided by financing activities	3,652	2,029
Net (decrease) increase in cash and equivalents	691	44
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	441	1,018	1,018
CASH AND EQUIVALENTS AT END OF PERIOD	1,132	1,062
Eliminations and Reclassifications
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	0	0
Payments to Acquire Businesses, Net of Cash Acquired		0
INVESTING ACTIVITIES:
Capital expenditures	0	0
Proceeds from sale of assets	0	0
Return of capital from subsidiaries	(683)
Investment in subsidiaries	800	(1,816)
Changes in restricted cash	0	0
Net cash used in investing activities	117	(1,816)
FINANCING ACTIVITIES:
Proceeds from borrowings on senior Credit Agreement	0	0
Proceeds from Issuance of Senior Long-term Debt		0
Proceeds from issuance of long-term debt		0
Principal payments on Senior Credit Agreement	0	0
Debt Issuance Cost		0
Repurchases of common stock	0	0
Exercise of stock options and other	0	0
Restricted stock tax withholdings	0	0
Excess tax benefit from share-based awards	0	0
Principal payments on capital lease obligations		0
Intercompany funding	(117)	1,816
Net cash provided by financing activities	(117)	1,816
Net (decrease) increase in cash and equivalents	0	0
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	0	0	0
CASH AND EQUIVALENTS AT END OF PERIOD	$ 0	$ 0