PENSION PLANS - Fair Value of Pension Assets (Details) - USD ($) $ in Thousands	Jul. 28, 2018	Jul. 29, 2017
Defined Benefit Plan Disclosure [Line Items]
Cash	$ 17	$ 776
Equity Securities [Abstract]
Company stock	611	636
Mutual/Collective Trust Funds - U.S.	10,213	0
Mutual/Collective Trust Funds - International	8,337	0
U.S large cap	0	20,893
U.S. small/mid cap	0	6,823
International	0	7,608
Emerging markets	0	1,277
Fixed Income Securities [Abstract]
Mutual/Collective Trust Funds - Fixed Income	41,893	0
U.S treasuries	0	9,876
Mortgage-backed	0	1,889
Corporate bonds	0	6,110
International	0	619
Total	61,071	56,507
Level 1
Defined Benefit Plan Disclosure [Line Items]
Cash	17	166
Equity Securities [Abstract]
Company stock	611	636
Mutual/Collective Trust Funds - U.S.	0	0
Mutual/Collective Trust Funds - International	0	0
U.S large cap	0	19,696
U.S. small/mid cap	0	6,644
International	0	7,187
Emerging markets	0	1,277
Fixed Income Securities [Abstract]
Mutual/Collective Trust Funds - Fixed Income	0	0
U.S treasuries	0	9,520
Mortgage-backed	0	1,783
Corporate bonds	0	2,931
International	0	619
Total	628	50,459
FairValueMeasuredAtNetAssetValuePerShareMember [Domain]
Equity Securities [Abstract]
Mutual/Collective Trust Funds - U.S.	10,213
Mutual/Collective Trust Funds - International	8,337
Fixed Income Securities [Abstract]
Mutual/Collective Trust Funds - Fixed Income	41,893
Total	60,443
Assets Measured at NAV/Level 2
Defined Benefit Plan Disclosure [Line Items]
Cash	0	610
Equity Securities [Abstract]
Company stock	0	0
Mutual/Collective Trust Funds - U.S.		0
Mutual/Collective Trust Funds - International		0
U.S large cap	0	1,197
U.S. small/mid cap	0	179
International	0	421
Emerging markets	0	0
Fixed Income Securities [Abstract]
Mutual/Collective Trust Funds - Fixed Income		0
U.S treasuries	0	356
Mortgage-backed	0	106
Corporate bonds	0	3,179
International	$ 0	0
Total		$ 6,048