CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 27, 2012	Jan. 28, 2011	Jan. 27, 2012	Jan. 28, 2011
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) [Abstract]
Total revenue	$ 673,234	$ 640,277	$ 1,271,671	$ 1,238,968
Cost of goods sold	235,391	219,390	421,698	399,143
Gross profit	437,843	420,887	849,973	839,825
Labor and other related expenses	234,933	223,182	455,901	447,786
Other store operating expenses	119,136	112,164	228,180	224,123
Store operating income	83,774	85,541	165,892	167,916
General and administrative expenses	36,437	33,068	73,931	69,944
Impairment and store dispositions, net	0	1	0	84
Operating income	47,337	52,472	91,961	97,888
Interest expense	11,025	11,830	22,160	23,544
Income before income taxes	36,312	40,642	69,801	74,344
Provision for income taxes	10,703	11,865	20,390	21,833
Net income	$ 25,609	$ 28,777	$ 49,411	$ 52,511
Net income per share:
Basic (in dollars per share)	$ 1.11	$ 1.24	$ 2.16	$ 2.28
Diluted (in dollars per share)	$ 1.10	$ 1.20	$ 2.13	$ 2.21
Weighted average shares:
Basic (in shares)	22,968,002	23,237,493	22,919,451	23,034,943
Diluted (in shares)	23,306,177	23,919,251	23,225,963	23,756,567
Dividends declared per share (in dollars per share)	$ 0.25	$ 0.22	$ 0.50	$ 0.44