RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jan. 27, 2018	Jan. 27, 2018	Oct. 28, 2017	Jul. 30, 2017	Jul. 29, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred income taxes	$ 0	$ 0	$ 40,600		$ 40,635
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net		$ 900
Cumulative effect of change in accounting principle				$ 509
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]
Cumulative effect of change in accounting principle				$ 1,314