Other Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 28, 2017	Jan. 23, 2016	Jan. 28, 2017	Jan. 23, 2016
Other Income and Expenses [Abstract]
Gain on sale of fixed assets	$ 1,729	$ 1,016	$ 3,172	$ 2,152
Miscellaneous (expense) income, net	(723)	56	(1,226)	390
Total other income, net	1,006	$ 1,072	1,946	$ 2,542
Other Financial Services Costs	$ (900)		$ (1,500)