Other Income, Net (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jan. 27, 2018	Jan. 28, 2017	Jan. 25, 2020	Jan. 26, 2019	Jul. 29, 2017
Other Income and Expenses [Abstract]
Gain on sale of fixed assets	$ 7,217		$ 14,879	$ 19,390	$ 14,866
Discount fee expense	(1,418)		(4,248)	(4,143)	(3,247)
Miscellaneous income, net	426		1,034	751	1,161
Write-off of deferred financing costs	0		0	(156)	0
Other income, net	$ 6,225	$ 1,946	$ 11,665	$ 15,842	$ 12,780