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Other Non-Current Assets - Investments in Unconsolidated Affiliates (Details)
$ in Thousands
9 Months Ended 12 Months Ended
Apr. 29, 2020
USD ($)
Mar. 29, 2020
USD ($)
Jun. 28, 2020
USD ($)
Jun. 27, 2021
USD ($)
Oct. 31, 2009
Sep. 30, 2000
Schedule Of Equity Method Investments [Line Items]            
Equity method investments     $ 2,171 $ 2,159    
UNF [Member]            
Schedule Of Equity Method Investments [Line Items]            
Equity method investment, ownership percentage           50.00%
UNF America [Member]            
Schedule Of Equity Method Investments [Line Items]            
Equity method investment, ownership percentage         50.00%  
UNF and UNF America [Member]            
Schedule Of Equity Method Investments [Line Items]            
Purchase commitment, remaining minimum amount committed       1,741    
Accounts payable, related parties     $ 1,166 $ 2,955    
Percentage of current and total assets and total liabilities counted for by equity method investments       3.00%    
Equity method investments       $ 2,159    
Parkdale America LLC [Member]            
Schedule Of Equity Method Investments [Line Items]            
Equity method investment, ownership percentage     34.00% 34.00%    
Equity method investment, other than temporary impairment   $ 45,194 $ 45,194      
Proceeds from sale of equity method investments $ 60,000          
Number of manufacturing facilities     10      
Parkdale America LLC [Member] | Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]            
Schedule Of Equity Method Investments [Line Items]            
Number of major customers     5      
Parkdale America LLC [Member] | Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Five Largest Customers [Member]            
Schedule Of Equity Method Investments [Line Items]            
Concentration risk, percentage     69.00%      
Parkdale America LLC [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] | Five Largest Customers [Member]            
Schedule Of Equity Method Investments [Line Items]            
Concentration risk, percentage     68.00%