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Restructuring Costs - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Feb. 28, 2021
Aug. 30, 2020
Feb. 23, 2020
Feb. 28, 2021
Feb. 23, 2020
Restructuring Cost and Reserve [Line Items]          
Proceeds from sales of property and equipment       $ 12,885 $ 2,432
Gain on sale of property       (39) $ (135)
Expected restructuring costs $ 32,000     $ 32,000  
Equipment          
Restructuring Cost and Reserve [Line Items]          
Impairment of assets held for sale $ 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 sale of property   2,800      
Impairment of assets held for sale     $ 10,900    
Manufacturing Operations in Hanover, Pennsylvania          
Restructuring Cost and Reserve [Line Items]          
Impairment of assets held for sale   $ 8,800