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PENSION PLANS - Fair Value of Pension Assets (Details) - USD ($) $ in Thousands | Jul. 30, 2016 | Jul. 25, 2015
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Cash | $ 1,173 | $ 718
Equity Securities [Abstract] |  |
Company stock | 770 | 651
U.S large cap | 18,416 | 18,368
U.S. small/mid cap | 6,591 | 6,602
International | 6,752 | 6,431
Emerging markets | 1,219 | 1,193
Fixed Income Securities [Abstract] |  |
U.S treasuries | 10,560 | 9,911
Mortgage-backed | 1,918 | 2,014
Corporate bonds | 5,194 | 5,180
International | 688 | 661
Total | 53,281 | 51,729
Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Cash | 1,173 | 718
Equity Securities [Abstract] |  |
Company stock | 770 | 651
U.S large cap | 18,416 | 18,368
U.S. small/mid cap | 6,591 | 6,602
International | 6,752 | 6,431
Emerging markets | 1,219 | 1,193
Fixed Income Securities [Abstract] |  |
U.S treasuries | 10,560 | 9,911
Mortgage-backed | 0 | 0
Corporate bonds | 3,054 | 2,810
International | 688 | 661
Total | 49,223 | 47,345
Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Cash | 0 | 0
Equity Securities [Abstract] |  |
Company stock | 0 | 0
U.S large cap | 0 | 0
U.S. small/mid cap | 0 | 0
International | 0 | 0
Emerging markets | 0 | 0
Fixed Income Securities [Abstract] |  |
U.S treasuries | 0 | 0
Mortgage-backed | 1,918 | 2,014
Corporate bonds | 2,140 | 2,370
International | 0 | 0
Total | $ 4,058 | $ 4,384

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