PENSION PLANS - Fair Value of Pension Assets (Details) - USD ($) $ in Thousands	Jul. 25, 2015	Jul. 26, 2014
Defined Benefit Plan Disclosure [Line Items]
Cash	$ 718	$ 812
Equity Securities [Abstract]
Company stock	651	541
U.S large cap	18,368	17,095
U.S. small/mid cap	6,602	5,916
International	6,431	6,963
Emerging markets	1,193	1,267
Fixed Income Securities [Abstract]
U.S treasuries	9,911	9,399
Mortgage-backed	2,014	2,207
Corporate bonds	5,180	5,262
International	661	667
Total	51,729	50,129
Level 1
Defined Benefit Plan Disclosure [Line Items]
Cash	718	812
Equity Securities [Abstract]
Company stock	651	541
U.S large cap	18,368	17,095
U.S. small/mid cap	6,602	5,916
International	6,431	6,963
Emerging markets	1,193	1,267
Fixed Income Securities [Abstract]
U.S treasuries	9,911	9,399
Mortgage-backed	0	0
Corporate bonds	2,810	1,857
International	661	667
Total	47,345	44,517
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	2,014	2,207
Corporate bonds	2,370	3,405
International	0	0
Total	$ 4,384	$ 5,612