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SIGNIFICANT ACCOUNTING POLICIES SIGNIFICANT ACCOUNTING POLICIES (Details 9) - USD ($) $ in Thousands	12 Months Ended
	Jul. 28, 2018	Jul. 29, 2017	Jul. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
income tax expense related to tax deficiencies for share-based payments	$ 1,100
Tax deficit associated with stock plans	0	$ 1,320
Tax deficit associated with stock plans			$ (83)
Deferred income taxes	0	40,635
Debt Issuance Costs, Noncurrent, Net	1,200	1,500
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	(805)
Additional Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	$ 1,314
Tax deficit associated with stock plans		$ 1,320
Tax deficit associated with stock plans			$ (83)

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