CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 30, 2015	Jan. 31, 2014	Jan. 30, 2015	Jan. 31, 2014
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) [Abstract]
Total revenue	$ 755,966	$ 698,491	$ 1,439,394	$ 1,347,632
Cost of goods sold	262,155	243,015	484,450	448,944
Gross profit	493,811	455,476	954,944	898,688
Labor and other related expenses	251,674	238,742	494,001	475,489
Other store operating expenses	133,726	128,100	263,898	253,441
Store operating income	108,411	88,634	197,045	169,758
General and administrative expenses	37,190	29,928	70,382	66,815
Operating income	71,221	58,706	126,663	102,943
Interest expense	4,684	4,471	9,108	8,878
Income before income taxes	66,537	54,235	117,555	94,065
Provision for income taxes	19,374	17,180	36,368	29,850
Net income	$ 47,163	$ 37,055	$ 81,187	$ 64,215
Net income per share:
Basic (in dollars per share)	$ 1.97	$ 1.56	$ 3.40	$ 2.70
Diluted (in dollars per share)	$ 1.96	$ 1.55	$ 3.38	$ 2.68
Weighted average shares:
Basic (in shares)	23,914,797	23,812,777	23,888,496	23,815,107
Diluted (in shares)	24,032,389	23,970,611	24,016,913	23,947,850
Dividends declared per share (in dollars per share)	$ 1.00	$ 0.75	$ 2.00	$ 1.50