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Property and Equipment - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
May 31, 2020
May 26, 2019
May 27, 2018
Property, Plant and Equipment [Line Items]      
Depreciation and amortization expense $ 16,300 $ 13,100 $ 11,000
Amortization of leased assets 116 100 100
Capitalized software development costs 3,100 1,000 900
Amortization related to computer software 800 900 600
Unamortized computer software cost 5,000 2,800  
Capitalized interest 1,200 700 600
Impairment of long-lived assets to be disposed of 10,900    
Property and equipment, net 192,338 200,027  
Current portion of lease liabilities 4,423 75  
Long term lease liabilities 26,378 3,532  
Proceeds from sales of property and equipment 2,434 $ 264 $ 100
O Olive & Vinegar      
Property, Plant and Equipment [Line Items]      
Impairment of property and equipment 1,300    
San Rafael      
Property, Plant and Equipment [Line Items]      
Impairment of long-lived assets to be disposed of 400    
Proceeds from sales of property and equipment 2,400    
Salad dressing plant in Ontario, CA      
Property, Plant and Equipment [Line Items]      
Impairment of long-lived assets to be disposed of 10,900    
Property and equipment, net 2,600    
Current portion of lease liabilities 300    
Long term lease liabilities $ 2,900