ACQUISITIONS (Details 2) - USD ($) $ in Thousands		3 Months Ended		4 Months Ended	12 Months Ended
	Mar. 31, 2016	Apr. 29, 2017	Jan. 28, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016	Aug. 01, 2015
Assets Acquired and Liabilities Assumed
Goodwill				$ 366,168	$ 371,259	$ 366,168	$ 266,640
Goodwill, Purchase Accounting Adjustments						99,436
Nor-Cal Produce, Inc.
Business Acquisition [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual				51,400
Business acquisition, cash consideration paid	$ 67,800
Assets Acquired and Liabilities Assumed
Accounts receivable				8,483	8,483	8,483
Measurement period adjustments, accounts receivable					0
Inventories				1,902	1,902	1,902
Measurement period adjustments, inventories					0
Property and equipment				10,029	10,029	10,029
Measurement period adjustment, property and equipment					0
Other assets				125	125	125
Measurement period adjustments, other assets					0
Goodwill				40,342	36,517	40,342
Goodwill, Purchase Accounting Adjustments		$ (120)	$ (2,908)		(3,825)
Total assets				92,681	88,856	92,681
Measurement period adjustment, total assets					(3,825)
Liabilities				24,101	21,073	24,101
Measurement period adjustments, liabilities					(3,028)
Total purchase price				68,580	67,783	68,580
Measurement period adjustments, total purchase price		$ 797			$ (797)
Customer Lists | Nor-Cal Produce, Inc.
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life					13 years
Assets Acquired and Liabilities Assumed
Finite-lived intangible assets				30,300	$ 30,300	30,300
Measurement period adjustments, finite-lived intangible assets					0
Tradename | Nor-Cal Produce, Inc.
Assets Acquired and Liabilities Assumed
Finite-lived intangible assets				1,000	1,000	1,000
Measurement period adjustments, finite-lived intangible assets					$ 0
Non-compete agreements | Nor-Cal Produce, Inc.
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life					5 years
Assets Acquired and Liabilities Assumed
Finite-lived intangible assets				$ 500	$ 500	$ 500
Measurement period adjustments, finite-lived intangible assets					$ 0