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Income Taxes - Components of Income Tax (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 29, 2017
Jul. 30, 2016
Jul. 25, 2015
Current:      
Federal $ 62,455 $ 42,096 $ 42,516
Foreign 176 310 502
State 12,344 8,399 6,998
Current taxes 74,975 50,805 50,016
Deferred:      
Federal 17,051 26,467 305
Foreign (35) (296) 268
State 1,217 611 671
Deferred taxes 18,233 26,782 1,244
Total provision for income taxes $ 93,208 $ 77,587 $ 51,260