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ACQUISITIONS (Details 2) - USD ($)
$ in Thousands
 3 Months Ended 4 Months Ended 12 Months Ended
Mar. 31, 2016
Apr. 28, 2018
Jan. 27, 2018
Jul. 30, 2016
Jul. 28, 2018
Jul. 29, 2017
Assets Acquired and Liabilities Assumed            
Goodwill       $ 366,168 $ 362,495 $ 371,259
Goodwill, Purchase Accounting Adjustments           $ 10,102
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  
Inventories         1,902  
Property and equipment         10,029  
Other assets         125  
Goodwill         36,517  
Goodwill, Purchase Accounting Adjustments   $ (120) $ (2,908)      
Total assets         88,856  
Liabilities         21,073  
Total purchase price         $ 67,783  
Measurement period adjustments, total purchase price   $ 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  
Tradename | Nor-Cal Produce, Inc.            
Assets Acquired and Liabilities Assumed            
Finite-lived intangible assets         $ 1,000  
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