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Restructuring Costs - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
May 30, 2021
Feb. 28, 2021
Aug. 30, 2020
May 30, 2021
May 31, 2020
May 26, 2019
Restructuring Cost and Reserve [Line Items]            
Proceeds from sales of property and equipment       $ 12,913 $ 2,434 $ 264
Gain on disposal       (61) $ (143) $ (188)
Impairment of long-lived assets to be disposed of $ 500          
Equipment            
Restructuring Cost and Reserve [Line Items]            
Impairment of long-lived assets to be disposed of   $ 1,900        
Salad dressing plant in Ontario, California            
Restructuring Cost and Reserve [Line Items]            
Proceeds from sales of property and equipment     $ 4,900      
Gain on disposal     2,800 $ 2,800    
Manufacturing operations in Hanover, Pennsylvania            
Restructuring Cost and Reserve [Line Items]            
Impairment of long-lived assets to be disposed of     $ 8,800