BUSINESS ACQUISITION (Details) $ in Thousands		6 Months Ended
	May 14, 2020 USD ($) ft² store	Jan. 23, 2021 USD ($)	Jan. 25, 2020 USD ($)	Jul. 25, 2020 USD ($)
Business Acquisition [Line Items]
Payment for acquisition, net of cash acquired		$ 0	$ (64)
Goodwill acquired in acquisition		$ 24,190		$ 24,190
Fairway Markets
Business Acquisition [Line Items]
Number of stores acquired | store	5
Average area of each supermarket acquired (in sq ft) | ft²	52,000
Average selling area of each supermarket acquired (in sq ft) | ft²	30,000
Payment for acquisition, net of cash acquired	$ 73,622
Acquisition credit	2,035
Goodwill acquired in acquisition	11,540
Trade name intangible asset	14,200
Fairway Markets | Off-Market Favorable Lease
Business Acquisition [Line Items]
Finite-lived intangible asset acquired	$ 4,360