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Property and Equipment - Depreciation Expense and Repairs (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 29, 2017
Jul. 30, 2016
Jul. 25, 2015
Property, Plant and Equipment [Abstract]      
Depreciation expense $ 123,125 $ 105,514 $ 79,331
Repairs and maintenance expense $ 31,272 $ 29,487 $ 22,054