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Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Jul. 27, 2019
Jul. 28, 2018
Apr. 27, 2019
Apr. 28, 2018
Disaggregation of Revenue [Line Items]        
Revenues $ 319,657 $ 337,484    
Rental income 17,430 19,639    
Contract with Customer, Liability, Current 14,188      
Contract with Customer, Asset, Net 0 0    
Deferred Revenue 14,188 15,851 $ 20,418 $ 20,144
Deferred Revenue, Additions 18,083 25,100    
Contract with Customer, Liability, Revenue Recognized (24,313) (29,393)    
Retail Segment [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 274,656 287,085    
Rental income 17,430 19,639    
Retail Segment [Member] | Retail Product [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 246,375 256,111    
Retail Segment [Member] | Service and Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 10,851 11,335    
Wholesale [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 72,309 89,944    
DSS [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 5,374 5,677    
Intersegment Eliminations [Member]        
Disaggregation of Revenue [Line Items]        
Revenues $ (32,682) $ (45,222)