Share-Based Compensation, Stock Options (Details) - Stock Options [Member] - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Aug. 03, 2018	Jul. 28, 2017	Jul. 29, 2016
Stock Options [Abstract]
Yearly exercisable cumulative rate		33.00%
Number of years to expiration date from grant date		10 years
Fixed options, shares [Roll Forward]
Outstanding, beginning of period (in shares)		4,000
Granted (in shares)		0	0	0
Exercised (in shares)		(4,000)
Outstanding, end of period (in shares)		0	4,000
Fixed options, weighted-average price [Roll Forward]
Outstanding, beginning of period (in dollars per share)		$ 32.86
Exercised (in dollars per share)		32.86
Outstanding, end of period (in dollars per share)		$ 0	$ 32.86
Total intrinsic values of options exercised	[1]	$ 466	$ 1,070	$ 917

[1] The intrinsic value for stock options is defined as the difference between the current market value and the grant price.