LEASES - Additional Information (Details) ft² in Thousands, $ in Thousands			1 Months Ended	12 Months Ended
	Apr. 30, 2014 ft²	Nov. 06, 2013 ft²	Nov. 30, 2012 USD ($) real_estate_partnership	Jul. 25, 2015 USD ($) real_estate_partnership store property	Jul. 26, 2014 USD ($)	Jul. 27, 2013 USD ($)
Leased Assets [Line Items]
Number of stores leased | store				23
Number of leased stores capitalized | store				5
Renewal term				5 years
Number of real estate partnerships with company ownership interests | real_estate_partnership				3
Number of partnerships to which rent was paid for leased stores | real_estate_partnership				2
Rent paid to related partnership				$ 1,300	$ 1,008	$ 834
Proceeds from partnerships			$ 1,980	0	0	1,980
Number of partnerships from which dividends were received | real_estate_partnership			2
Income from partnerships						1,450
Rent paid to Wakefern under sublease agreement				1,296
Hanover Township, New Jersey
Leased Assets [Line Items]
Square feet of store | ft²		77
Morris Plains, New Jersey
Leased Assets [Line Items]
Business exit costs					3,481
Exit costs paid				1,692
Remaining exit cost liability				1,789
New Store, Union, New Jersey
Leased Assets [Line Items]
Square feet of store | ft²	59
Union, New Jersey
Leased Assets [Line Items]
Square feet of store | ft²	40
Business exit costs				929
Exit costs paid				663
Remaining exit cost liability				$ 266
Minimum
Leased Assets [Line Items]
Lease terms				20 years
Term of non-cancelable leases				1 year
Maximum
Leased Assets [Line Items]
Lease terms				30 years
Variable Interest Entity, Not Primary Beneficiary
Leased Assets [Line Items]
Number of variable interest entity real estate partnerships | real_estate_partnership				1
Number of properties owned by VIE partnership | property				1
Percentage of profits and losses entitled to Company				33.00%
Officer
Leased Assets [Line Items]
Officer ownership percentage in leasing property realty firm				30.00%
Rent paid to related parties				$ 640	$ 640	$ 640