Supplemental Consolidating Financial Statements Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Oct. 27, 2012	Oct. 29, 2011	Jul. 28, 2012	Jul. 30, 2011	Jul. 31, 2010
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 27,716	$ 19,433
INVESTING ACTIVITIES:
Capital expenditures	(12,523)	(20,857)
Proceeds from sale of assets	2,006	6,417
Changes in Restricted Cash	0	550
Capital Contribution To Subsidiaries		0
Net cash used in investing activities	(10,517)	(13,890)
FINANCING ACTIVITIES:
Repurchases of common stock	(15,203)	0	(12,960)	(64,548)	(4,489)
Exercise of stock options and other	166	940
Restricted stock tax withholdings	(62)	(37)
Excess tax benefit from share-based awards	64	175
Repayments of Long-term Capital Lease Obligations	(19)	(75)
Intercompany funding	0	0
Net cash (used in) provided by financing activities	(15,054)	1,003
Net increase in cash and equivalents	2,145	6,546
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	52,581	44,766
CASH AND EQUIVALENTS AT END OF PERIOD	54,726	51,312	52,581	44,766
Parent
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(2,961)	(4,705)
INVESTING ACTIVITIES:
Capital expenditures	(2,026)	(1,257)
Proceeds from sale of assets	0	0
Changes in Restricted Cash		550
Capital Contribution To Subsidiaries		0
Net cash used in investing activities	(2,026)	(707)
FINANCING ACTIVITIES:
Repurchases of common stock	(15,203)
Exercise of stock options and other	166	940
Restricted stock tax withholdings	(62)	(37)
Excess tax benefit from share-based awards	64	175
Repayments of Long-term Capital Lease Obligations	0	0
Intercompany funding	20,022	4,334
Net cash (used in) provided by financing activities	4,987	5,412
Net increase in cash and equivalents	0	0
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	0	0
CASH AND EQUIVALENTS AT END OF PERIOD	0	0
Issuer
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	1,260	798
INVESTING ACTIVITIES:
Capital expenditures	0	0
Proceeds from sale of assets	0	0
Changes in Restricted Cash		0
Capital Contribution To Subsidiaries		3,867
Net cash used in investing activities	0	3,867
FINANCING ACTIVITIES:
Repurchases of common stock	0
Exercise of stock options and other	0	0
Restricted stock tax withholdings	0	0
Excess tax benefit from share-based awards	0	0
Repayments of Long-term Capital Lease Obligations	0	0
Intercompany funding	(1,260)	(4,665)
Net cash (used in) provided by financing activities	(1,260)	(4,665)
Net increase in cash and equivalents	0	0
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	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	30,527	24,882
INVESTING ACTIVITIES:
Capital expenditures	(9,196)	(18,144)
Proceeds from sale of assets	1,958	6,401
Changes in Restricted Cash		0
Capital Contribution To Subsidiaries		0
Net cash used in investing activities	(7,238)	(11,743)
FINANCING ACTIVITIES:
Repurchases of common stock	0
Exercise of stock options and other	0	0
Restricted stock tax withholdings	0	0
Excess tax benefit from share-based awards	0	0
Repayments of Long-term Capital Lease Obligations	(19)	(75)
Intercompany funding	(20,737)	(6,410)
Net cash (used in) provided by financing activities	(20,756)	(6,485)
Net increase in cash and equivalents	2,533	6,654
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	51,563	44,608
CASH AND EQUIVALENTS AT END OF PERIOD	54,096	51,262
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(1,110)	(1,542)
INVESTING ACTIVITIES:
Capital expenditures	(1,301)	(1,456)
Proceeds from sale of assets	48	16
Changes in Restricted Cash		0
Capital Contribution To Subsidiaries		0
Net cash used in investing activities	(1,253)	(1,440)
FINANCING ACTIVITIES:
Repurchases of common stock	0
Exercise of stock options and other	0	0
Restricted stock tax withholdings	0	0
Excess tax benefit from share-based awards	0	0
Repayments of Long-term Capital Lease Obligations	0	0
Intercompany funding	1,975	2,874
Net cash (used in) provided by financing activities	1,975	2,874
Net increase in cash and equivalents	(388)	(108)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	1,018	158
CASH AND EQUIVALENTS AT END OF PERIOD	630	50
Eliminations and Reclassifications
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	0	0
INVESTING ACTIVITIES:
Capital expenditures	0	0
Proceeds from sale of assets	0	0
Changes in Restricted Cash		0
Capital Contribution To Subsidiaries		(3,867)
Net cash used in investing activities	0	(3,867)
FINANCING ACTIVITIES:
Repurchases of common stock	0
Exercise of stock options and other	0	0
Restricted stock tax withholdings	0	0
Excess tax benefit from share-based awards	0	0
Repayments of Long-term Capital Lease Obligations	0	0
Intercompany funding	0	3,867
Net cash (used in) provided by financing activities	0	3,867
Net increase in cash and equivalents	0	0
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	0
CASH AND EQUIVALENTS AT END OF PERIOD	$ 0	$ 0