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PENSION PLANS - Fair Value of Pension Assets (Details) - USD ($) $ in Thousands | Jul. 29, 2017 | Jul. 30, 2016
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Cash | $ 776 | $ 1,173
Equity Securities [Abstract] |  |
Company stock | 636 | 770
U.S large cap | 20,893 | 18,416
U.S. small/mid cap | 6,823 | 6,591
International | 7,608 | 6,752
Emerging markets | 1,277 | 1,219
Fixed Income Securities [Abstract] |  |
U.S treasuries | 9,876 | 10,560
Mortgage-backed | 1,889 | 1,918
Corporate bonds | 6,110 | 5,194
International | 619 | 688
Total | 56,507 | 53,281
Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Cash | 166 | 1,173
Equity Securities [Abstract] |  |
Company stock | 636 | 770
U.S large cap | 19,696 | 18,416
U.S. small/mid cap | 6,644 | 6,591
International | 7,187 | 6,752
Emerging markets | 1,277 | 1,219
Fixed Income Securities [Abstract] |  |
U.S treasuries | 9,520 | 10,560
Mortgage-backed | 1,783 | 0
Corporate bonds | 2,931 | 3,054
International | 619 | 688
Total | 50,459 | 49,223
Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Cash | 610 | 0
Equity Securities [Abstract] |  |
Company stock | 0 | 0
U.S large cap | 1,197 | 0
U.S. small/mid cap | 179 | 0
International | 421 | 0
Emerging markets | 0 | 0
Fixed Income Securities [Abstract] |  |
U.S treasuries | 356 | 0
Mortgage-backed | 106 | 1,918
Corporate bonds | 3,179 | 2,140
International | 0 | 0
Total | $ 6,048 | $ 4,058

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