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Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Assets Held For Sale (Details) - USD ($)
$ in Thousands
3 Months Ended 15 Months Ended
Aug. 30, 2020
Feb. 23, 2020
Aug. 25, 2019
Aug. 30, 2020
May 31, 2020
Property, Plant and Equipment [Line Items]          
Property and equipment, net $ 171,413     $ 171,413 $ 192,338
Gain on sale of property 11   $ 7    
Restructuring costs 8,404   0 $ 25,689  
Proceeds from sales of property and equipment 4,855   $ 19    
Salad Dressing Plant In Ontario, California          
Property, Plant and Equipment [Line Items]          
Impairment of assets held for sale   $ 10,900      
Property and equipment, net         2,600
Operating and finance lease, current         300
Operating and finance lease, noncurrent         2,900
Gain on sale of property 2,800        
Proceeds from sales of property and equipment 4,900        
Manufacturing Operations in Hanover, Pennsylvania          
Property, Plant and Equipment [Line Items]          
Impairment of assets held for sale 8,800        
Property and equipment, net         $ 17,200
Asset reclassification from property and equipment to other current assets | Manufacturing Operations in Hanover, Pennsylvania          
Property, Plant and Equipment [Line Items]          
Restructuring costs $ 8,000