CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]
Balance at Aug. 01, 2008	$ 92,751	$ 223	$ 731	$ (27,653)	$ 119,450
Balance (in shares) at Aug. 01, 2008		22,325,341
Comprehensive Income:
Net income	65,926	0	0	0	65,926
Change in fair value of interest rate swap, net of tax	(17,169)	0	0	(17,169)	0
Total comprehensive income	48,757	0	0	(17,169)	65,926
Cash dividends declared	(18,131)	0	0	0	(18,131)
Share-based compensation	6,946	0	6,946	0	0
Exercise of share-based compensation awards (in shares)		397,344
Exercise of share-based compensation awards	4,362	4	4,358	0	0
Tax benefit realized upon exercise of share-based compensation awards	937	0	937	0	0
Balance at Jul. 31, 2009	135,622	227	12,972	(44,822)	167,245
Balance (in shares) at Jul. 31, 2009		22,722,685
Comprehensive Income:
Net income	85,258	0	0	0	85,258
Change in fair value of interest rate swap, net of tax	(4,027)	0	0	(4,027)	0
Total comprehensive income	81,231	0	0	(4,027)	85,258
Cash dividends declared	(18,465)	0	0	0	(18,465)
Share-based compensation	13,193	0	13,193	0	0
Exercise of share-based compensation awards (in shares)		1,362,096
Exercise of share-based compensation awards	37,460	14	37,446	0	0
Tax benefit realized upon exercise of share-based compensation awards	5,063	0	5,063	0	0
Purchases and retirement of common stock (in shares)	1,352,000	(1,352,000)
Purchases and retirement of common stock	(62,487)	(13)	(62,474)	0	0
Balance at Jul. 30, 2010	191,617	228	6,200	(48,849)	234,038
Balance (in shares) at Jul. 30, 2010	22,732,781	22,732,781
Comprehensive Income:
Net income	85,208	0	0	0	85,208
Change in fair value of interest rate swap, net of tax	10,817	0	0	10,817	0
Total comprehensive income	96,025	0	0	10,817	85,208
Cash dividends declared	(20,489)	0	0	0	(20,489)
Share-based compensation	9,796	0	9,796	0	0
Exercise of share-based compensation awards (in shares)		784,793
Exercise of share-based compensation awards	20,540	7	20,533	0	0
Tax benefit realized upon exercise of share-based compensation awards	4,108	0	4,108	0	0
Purchases and retirement of common stock (in shares)	676,600	(676,600)
Purchases and retirement of common stock	(33,563)	(7)	(33,556)	0	0
Balance at Jul. 29, 2011	$ 268,034	$ 228	$ 7,081	$ (38,032)	$ 298,757
Balance (in shares) at Jul. 29, 2011	22,840,974	22,840,974

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This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

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Tax benefit associated with any equity-based compensation plan other than an employee stock ownership plan (ESOP). The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. Includes any resulting tax benefit that exceeds the previously recognized deferred tax asset (excess tax benefits).

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- Definition

Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Shares outstanding equals shares issued minus shares held in treasury and other adjustments, if any.

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The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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- Definition

Equity impact of common stock cash dividends declared by an entity during the period. This element includes paid and unpaid dividends declared during the period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Change in accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges, net of tax effect. The after tax effect change includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Number of share options (or share units) exercised during the current period.

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