Net Income Per Share and Weighted Average Shares (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Nov. 01, 2013	Nov. 02, 2012
Net Income Per Share and Weighted Average Shares [Abstract]
Net income per share numerator	$ 27,160	$ 23,192
Net income per share denominator: [Abstract]
Weighted average shares (in shares)	23,817,436	23,577,574
Add potential dilution: [Abstract]
Stock options and nonvested stock and stock awards and MSU Grants (in shares)	107,652	210,051
Diluted weighted average shares (in shares)	23,925,088	23,787,625